diff options
Diffstat (limited to 'arch/sparc64/kernel')
49 files changed, 7059 insertions, 2273 deletions
diff --git a/arch/sparc64/kernel/Makefile b/arch/sparc64/kernel/Makefile index 83d67eb1889..6f6816488b0 100644 --- a/arch/sparc64/kernel/Makefile +++ b/arch/sparc64/kernel/Makefile @@ -11,10 +11,12 @@ obj-y := process.o setup.o cpu.o idprom.o \ traps.o devices.o auxio.o una_asm.o \ irq.o ptrace.o time.o sys_sparc.o signal.o \ unaligned.o central.o pci.o starfire.o semaphore.o \ - power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o + power.o sbus.o iommu_common.o sparc64_ksyms.o chmc.o \ + visemul.o obj-$(CONFIG_PCI) += ebus.o isa.o pci_common.o pci_iommu.o \ - pci_psycho.o pci_sabre.o pci_schizo.o + pci_psycho.o pci_sabre.o pci_schizo.o \ + pci_sun4v.o pci_sun4v_asm.o obj-$(CONFIG_SMP) += smp.o trampoline.o obj-$(CONFIG_SPARC32_COMPAT) += sys32.o sys_sparc32.o signal32.o obj-$(CONFIG_BINFMT_ELF32) += binfmt_elf32.o @@ -38,5 +40,5 @@ else CMODEL_CFLAG := -m64 -mcmodel=medlow endif -head.o: head.S ttable.S itlb_base.S dtlb_base.S dtlb_backend.S dtlb_prot.S \ +head.o: head.S ttable.S itlb_miss.S dtlb_miss.S ktlb.S tsb.S \ etrap.S rtrap.S winfixup.S entry.S diff --git a/arch/sparc64/kernel/binfmt_aout32.c b/arch/sparc64/kernel/binfmt_aout32.c index 202a80c24b6..d7caa60a007 100644 --- a/arch/sparc64/kernel/binfmt_aout32.c +++ b/arch/sparc64/kernel/binfmt_aout32.c @@ -31,6 +31,7 @@ #include <asm/system.h> #include <asm/uaccess.h> #include <asm/pgalloc.h> +#include <asm/mmu_context.h> static int load_aout32_binary(struct linux_binprm *, struct pt_regs * regs); static int load_aout32_library(struct file*); @@ -238,6 +239,8 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs) (current->mm->start_data = N_DATADDR(ex)); current->mm->brk = ex.a_bss + (current->mm->start_brk = N_BSSADDR(ex)); + current->mm->free_area_cache = current->mm->mmap_base; + current->mm->cached_hole_size = 0; current->mm->mmap = NULL; compute_creds(bprm); @@ -329,15 +332,8 @@ beyond_if: current->mm->start_stack = (unsigned long) create_aout32_tables((char __user *)bprm->p, bprm); - if (!(orig_thr_flags & _TIF_32BIT)) { - unsigned long pgd_cache = get_pgd_cache(current->mm->pgd); - - __asm__ __volatile__("stxa\t%0, [%1] %2\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (pgd_cache), - "r" (TSB_REG), "i" (ASI_DMMU)); - } + tsb_context_switch(current->mm); + start_thread32(regs, ex.a_entry, current->mm->start_stack); if (current->ptrace & PT_PTRACED) send_sig(SIGTRAP, current, 0); diff --git a/arch/sparc64/kernel/binfmt_elf32.c b/arch/sparc64/kernel/binfmt_elf32.c index a1a12d2aa35..8a2abcce273 100644 --- a/arch/sparc64/kernel/binfmt_elf32.c +++ b/arch/sparc64/kernel/binfmt_elf32.c @@ -153,7 +153,9 @@ MODULE_AUTHOR("Eric Youngdale, David S. Miller, Jakub Jelinek"); #undef MODULE_DESCRIPTION #undef MODULE_AUTHOR +#include <asm/a.out.h> + #undef TASK_SIZE -#define TASK_SIZE 0xf0000000 +#define TASK_SIZE STACK_TOP32 #include "../../../fs/binfmt_elf.c" diff --git a/arch/sparc64/kernel/cpu.c b/arch/sparc64/kernel/cpu.c index 00eed88ef2e..11cc0caef59 100644 --- a/arch/sparc64/kernel/cpu.c +++ b/arch/sparc64/kernel/cpu.c @@ -13,6 +13,7 @@ #include <asm/system.h> #include <asm/fpumacro.h> #include <asm/cpudata.h> +#include <asm/spitfire.h> DEFINE_PER_CPU(cpuinfo_sparc, __cpu_data) = { 0 }; @@ -71,6 +72,12 @@ void __init cpu_probe(void) unsigned long ver, fpu_vers, manuf, impl, fprs; int i; + if (tlb_type == hypervisor) { + sparc_cpu_type = "UltraSparc T1 (Niagara)"; + sparc_fpu_type = "UltraSparc T1 integrated FPU"; + return; + } + fprs = fprs_read(); fprs_write(FPRS_FEF); __asm__ __volatile__ ("rdpr %%ver, %0; stx %%fsr, [%1]" diff --git a/arch/sparc64/kernel/devices.c b/arch/sparc64/kernel/devices.c index df9a1ca8fd7..007e8922cd1 100644 --- a/arch/sparc64/kernel/devices.c +++ b/arch/sparc64/kernel/devices.c @@ -12,6 +12,7 @@ #include <linux/string.h> #include <linux/spinlock.h> #include <linux/errno.h> +#include <linux/bootmem.h> #include <asm/page.h> #include <asm/oplib.h> @@ -20,6 +21,8 @@ #include <asm/spitfire.h> #include <asm/timer.h> #include <asm/cpudata.h> +#include <asm/vdev.h> +#include <asm/irq.h> /* Used to synchronize acceses to NatSemi SUPER I/O chip configure * operations in asm/ns87303.h @@ -29,13 +32,158 @@ DEFINE_SPINLOCK(ns87303_lock); extern void cpu_probe(void); extern void central_probe(void); -static char *cpu_mid_prop(void) +u32 sun4v_vdev_devhandle; +int sun4v_vdev_root; + +struct vdev_intmap { + unsigned int phys; + unsigned int irq; + unsigned int cnode; + unsigned int cinterrupt; +}; + +struct vdev_intmask { + unsigned int phys; + unsigned int interrupt; + unsigned int __unused; +}; + +static struct vdev_intmap *vdev_intmap; +static int vdev_num_intmap; +static struct vdev_intmask vdev_intmask; + +static void __init sun4v_virtual_device_probe(void) +{ + struct linux_prom64_registers regs; + struct vdev_intmap *ip; + int node, sz, err; + + if (tlb_type != hypervisor) + return; + + node = prom_getchild(prom_root_node); + node = prom_searchsiblings(node, "virtual-devices"); + if (!node) { + prom_printf("SUN4V: Fatal error, no virtual-devices node.\n"); + prom_halt(); + } + + sun4v_vdev_root = node; + + prom_getproperty(node, "reg", (char *)®s, sizeof(regs)); + sun4v_vdev_devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff; + + sz = prom_getproplen(node, "interrupt-map"); + if (sz <= 0) { + prom_printf("SUN4V: Error, no vdev interrupt-map.\n"); + prom_halt(); + } + + if ((sz % sizeof(*ip)) != 0) { + prom_printf("SUN4V: Bogus interrupt-map property size %d\n", + sz); + prom_halt(); + } + + vdev_intmap = ip = alloc_bootmem_low_pages(sz); + if (!vdev_intmap) { + prom_printf("SUN4V: Error, cannot allocate vdev_intmap.\n"); + prom_halt(); + } + + err = prom_getproperty(node, "interrupt-map", (char *) ip, sz); + if (err == -1) { + prom_printf("SUN4V: Fatal error, no vdev interrupt-map.\n"); + prom_halt(); + } + if (err != sz) { + prom_printf("SUN4V: Inconsistent interrupt-map size, " + "proplen(%d) vs getprop(%d).\n", sz,err); + prom_halt(); + } + + vdev_num_intmap = err / sizeof(*ip); + + err = prom_getproperty(node, "interrupt-map-mask", + (char *) &vdev_intmask, + sizeof(vdev_intmask)); + if (err <= 0) { + prom_printf("SUN4V: Fatal error, no vdev " + "interrupt-map-mask.\n"); + prom_halt(); + } + if (err % sizeof(vdev_intmask)) { + prom_printf("SUN4V: Bogus interrupt-map-mask " + "property size %d\n", err); + prom_halt(); + } + + printk("SUN4V: virtual-devices devhandle[%x]\n", + sun4v_vdev_devhandle); +} + +unsigned int sun4v_vdev_device_interrupt(unsigned int dev_node) +{ + unsigned int irq, reg; + int err, i; + + err = prom_getproperty(dev_node, "interrupts", + (char *) &irq, sizeof(irq)); + if (err <= 0) { + printk("VDEV: Cannot get \"interrupts\" " + "property for OBP node %x\n", dev_node); + return 0; + } + + err = prom_getproperty(dev_node, "reg", + (char *) ®, sizeof(reg)); + if (err <= 0) { + printk("VDEV: Cannot get \"reg\" " + "property for OBP node %x\n", dev_node); + return 0; + } + + for (i = 0; i < vdev_num_intmap; i++) { + if (vdev_intmap[i].phys == (reg & vdev_intmask.phys) && + vdev_intmap[i].irq == (irq & vdev_intmask.interrupt)) { + irq = vdev_intmap[i].cinterrupt; + break; + } + } + + if (i == vdev_num_intmap) { + printk("VDEV: No matching interrupt map entry " + "for OBP node %x\n", dev_node); + return 0; + } + + return sun4v_build_irq(sun4v_vdev_devhandle, irq, 5, 0); +} + +static const char *cpu_mid_prop(void) { if (tlb_type == spitfire) return "upa-portid"; return "portid"; } +static int get_cpu_mid(int prom_node) +{ + if (tlb_type == hypervisor) { + struct linux_prom64_registers reg; + + if (prom_getproplen(prom_node, "cpuid") == 4) + return prom_getintdefault(prom_node, "cpuid", 0); + + prom_getproperty(prom_node, "reg", (char *) ®, sizeof(reg)); + return (reg.phys_addr >> 32) & 0x0fffffffUL; + } else { + const char *prop_name = cpu_mid_prop(); + + return prom_getintdefault(prom_node, prop_name, 0); + } +} + static int check_cpu_node(int nd, int *cur_inst, int (*compare)(int, int, void *), void *compare_arg, int *prom_node, int *mid) @@ -50,7 +198,7 @@ static int check_cpu_node(int nd, int *cur_inst, if (prom_node) *prom_node = nd; if (mid) - *mid = prom_getintdefault(nd, cpu_mid_prop(), 0); + *mid = get_cpu_mid(nd); return 0; } @@ -105,7 +253,7 @@ static int cpu_mid_compare(int nd, int instance, void *_arg) int desired_mid = (int) (long) _arg; int this_mid; - this_mid = prom_getintdefault(nd, cpu_mid_prop(), 0); + this_mid = get_cpu_mid(nd); if (this_mid == desired_mid) return 0; return -ENODEV; @@ -126,7 +274,8 @@ void __init device_scan(void) #ifndef CONFIG_SMP { - int err, cpu_node; + int err, cpu_node, def; + err = cpu_find_by_instance(0, &cpu_node, NULL); if (err) { prom_printf("No cpu nodes, cannot continue\n"); @@ -135,21 +284,40 @@ void __init device_scan(void) cpu_data(0).clock_tick = prom_getintdefault(cpu_node, "clock-frequency", 0); + + def = ((tlb_type == hypervisor) ? + (8 * 1024) : + (16 * 1024)); cpu_data(0).dcache_size = prom_getintdefault(cpu_node, "dcache-size", - 16 * 1024); + def); + + def = 32; cpu_data(0).dcache_line_size = - prom_getintdefault(cpu_node, "dcache-line-size", 32); + prom_getintdefault(cpu_node, "dcache-line-size", + def); + + def = 16 * 1024; cpu_data(0).icache_size = prom_getintdefault(cpu_node, "icache-size", - 16 * 1024); + def); + + def = 32; cpu_data(0).icache_line_size = - prom_getintdefault(cpu_node, "icache-line-size", 32); + prom_getintdefault(cpu_node, "icache-line-size", + def); + + def = ((tlb_type == hypervisor) ? + (3 * 1024 * 1024) : + (4 * 1024 * 1024)); cpu_data(0).ecache_size = prom_getintdefault(cpu_node, "ecache-size", - 4 * 1024 * 1024); + def); + + def = 64; cpu_data(0).ecache_line_size = - prom_getintdefault(cpu_node, "ecache-line-size", 64); + prom_getintdefault(cpu_node, "ecache-line-size", + def); printk("CPU[0]: Caches " "D[sz(%d):line_sz(%d)] " "I[sz(%d):line_sz(%d)] " @@ -160,6 +328,7 @@ void __init device_scan(void) } #endif + sun4v_virtual_device_probe(); central_probe(); cpu_probe(); diff --git a/arch/sparc64/kernel/dtlb_backend.S b/arch/sparc64/kernel/dtlb_backend.S deleted file mode 100644 index acc889a7f9c..00000000000 --- a/arch/sparc64/kernel/dtlb_backend.S +++ /dev/null @@ -1,170 +0,0 @@ -/* $Id: dtlb_backend.S,v 1.16 2001/10/09 04:02:11 davem Exp $ - * dtlb_backend.S: Back end to DTLB miss replacement strategy. - * This is included directly into the trap table. - * - * Copyright (C) 1996,1998 David S. Miller (davem@redhat.com) - * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -#include <asm/pgtable.h> -#include <asm/mmu.h> - -#define VALID_SZ_BITS (_PAGE_VALID | _PAGE_SZBITS) - -#define VPTE_BITS (_PAGE_CP | _PAGE_CV | _PAGE_P ) -#define VPTE_SHIFT (PAGE_SHIFT - 3) - -/* Ways we can get here: - * - * 1) Nucleus loads and stores to/from PA-->VA direct mappings at tl>1. - * 2) Nucleus loads and stores to/from user/kernel window save areas. - * 3) VPTE misses from dtlb_base and itlb_base. - * - * We need to extract out the PMD and PGDIR indexes from the - * linear virtual page table access address. The PTE index - * is at the bottom, but we are not concerned with it. Bits - * 0 to 2 are clear since each PTE is 8 bytes in size. Each - * PMD and PGDIR entry are 4 bytes in size. Thus, this - * address looks something like: - * - * |---------------------------------------------------------------| - * | ... | PGDIR index | PMD index | PTE index | | - * |---------------------------------------------------------------| - * 63 F E D C B A 3 2 0 <- bit nr - * - * The variable bits above are defined as: - * A --> 3 + (PAGE_SHIFT - log2(8)) - * --> 3 + (PAGE_SHIFT - 3) - 1 - * (ie. this is "bit 3" + PAGE_SIZE - size of PTE entry in bits - 1) - * B --> A + 1 - * C --> B + (PAGE_SHIFT - log2(4)) - * --> B + (PAGE_SHIFT - 2) - 1 - * (ie. this is "bit B" + PAGE_SIZE - size of PMD entry in bits - 1) - * D --> C + 1 - * E --> D + (PAGE_SHIFT - log2(4)) - * --> D + (PAGE_SHIFT - 2) - 1 - * (ie. this is "bit D" + PAGE_SIZE - size of PGDIR entry in bits - 1) - * F --> E + 1 - * - * (Note how "B" always evalutes to PAGE_SHIFT, all the other constants - * cancel out.) - * - * For 8K PAGE_SIZE (thus, PAGE_SHIFT of 13) the bit numbers are: - * A --> 12 - * B --> 13 - * C --> 23 - * D --> 24 - * E --> 34 - * F --> 35 - * - * For 64K PAGE_SIZE (thus, PAGE_SHIFT of 16) the bit numbers are: - * A --> 15 - * B --> 16 - * C --> 29 - * D --> 30 - * E --> 43 - * F --> 44 - * - * Because bits both above and below each PGDIR and PMD index need to - * be masked out, and the index can be as long as 14 bits (when using a - * 64K PAGE_SIZE, and thus a PAGE_SHIFT of 16), we need 3 instructions - * to extract each index out. - * - * Shifts do not pair very well on UltraSPARC-I, II, IIi, and IIe, so - * we try to avoid using them for the entire operation. We could setup - * a mask anywhere from bit 31 down to bit 10 using the sethi instruction. - * - * We need a mask covering bits B --> C and one covering D --> E. - * For 8K PAGE_SIZE these masks are 0x00ffe000 and 0x7ff000000. - * For 64K PAGE_SIZE these masks are 0x3fff0000 and 0xfffc0000000. - * The second in each set cannot be loaded with a single sethi - * instruction, because the upper bits are past bit 32. We would - * need to use a sethi + a shift. - * - * For the time being, we use 2 shifts and a simple "and" mask. - * We shift left to clear the bits above the index, we shift down - * to clear the bits below the index (sans the log2(4 or 8) bits) - * and a mask to clear the log2(4 or 8) bits. We need therefore - * define 4 shift counts, all of which are relative to PAGE_SHIFT. - * - * Although unsupportable for other reasons, this does mean that - * 512K and 4MB page sizes would be generaally supported by the - * kernel. (ELF binaries would break with > 64K PAGE_SIZE since - * the sections are only aligned that strongly). - * - * The operations performed for extraction are thus: - * - * ((X << FOO_SHIFT_LEFT) >> FOO_SHIFT_RIGHT) & ~0x3 - * - */ - -#define A (3 + (PAGE_SHIFT - 3) - 1) -#define B (A + 1) -#define C (B + (PAGE_SHIFT - 2) - 1) -#define D (C + 1) -#define E (D + (PAGE_SHIFT - 2) - 1) -#define F (E + 1) - -#define PMD_SHIFT_LEFT (64 - D) -#define PMD_SHIFT_RIGHT (64 - (D - B) - 2) -#define PGDIR_SHIFT_LEFT (64 - F) -#define PGDIR_SHIFT_RIGHT (64 - (F - D) - 2) -#define LOW_MASK_BITS 0x3 - -/* TLB1 ** ICACHE line 1: tl1 DTLB and quick VPTE miss */ - ldxa [%g1 + %g1] ASI_DMMU, %g4 ! Get TAG_ACCESS - add %g3, %g3, %g5 ! Compute VPTE base - cmp %g4, %g5 ! VPTE miss? - bgeu,pt %xcc, 1f ! Continue here - andcc %g4, TAG_CONTEXT_BITS, %g5 ! tl0 miss Nucleus test - ba,a,pt %xcc, from_tl1_trap ! Fall to tl0 miss -1: sllx %g6, VPTE_SHIFT, %g4 ! Position TAG_ACCESS - or %g4, %g5, %g4 ! Prepare TAG_ACCESS - -/* TLB1 ** ICACHE line 2: Quick VPTE miss */ - mov TSB_REG, %g1 ! Grab TSB reg - ldxa [%g1] ASI_DMMU, %g5 ! Doing PGD caching? - sllx %g6, PMD_SHIFT_LEFT, %g1 ! Position PMD offset - be,pn %xcc, sparc64_vpte_nucleus ! Is it from Nucleus? - srlx %g1, PMD_SHIFT_RIGHT, %g1 ! Mask PMD offset bits - brnz,pt %g5, sparc64_vpte_continue ! Yep, go like smoke - andn %g1, LOW_MASK_BITS, %g1 ! Final PMD mask - sllx %g6, PGDIR_SHIFT_LEFT, %g5 ! Position PGD offset - -/* TLB1 ** ICACHE line 3: Quick VPTE miss */ - srlx %g5, PGDIR_SHIFT_RIGHT, %g5 ! Mask PGD offset bits - andn %g5, LOW_MASK_BITS, %g5 ! Final PGD mask - lduwa [%g7 + %g5] ASI_PHYS_USE_EC, %g5! Load PGD - brz,pn %g5, vpte_noent ! Valid? -sparc64_kpte_continue: - sllx %g5, 11, %g5 ! Shift into place -sparc64_vpte_continue: - lduwa [%g5 + %g1] ASI_PHYS_USE_EC, %g5! Load PMD - sllx %g5, 11, %g5 ! Shift into place - brz,pn %g5, vpte_noent ! Valid? - -/* TLB1 ** ICACHE line 4: Quick VPTE miss */ - mov (VALID_SZ_BITS >> 61), %g1 ! upper vpte into %g1 - sllx %g1, 61, %g1 ! finish calc - or %g5, VPTE_BITS, %g5 ! Prepare VPTE data - or %g5, %g1, %g5 ! ... - mov TLB_SFSR, %g1 ! Restore %g1 value - stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Load VPTE into TLB - stxa %g4, [%g1 + %g1] ASI_DMMU ! Restore previous TAG_ACCESS - retry ! Load PTE once again - -#undef VALID_SZ_BITS -#undef VPTE_SHIFT -#undef VPTE_BITS -#undef A -#undef B -#undef C -#undef D -#undef E -#undef F -#undef PMD_SHIFT_LEFT -#undef PMD_SHIFT_RIGHT -#undef PGDIR_SHIFT_LEFT -#undef PGDIR_SHIFT_RIGHT -#undef LOW_MASK_BITS - diff --git a/arch/sparc64/kernel/dtlb_base.S b/arch/sparc64/kernel/dtlb_base.S deleted file mode 100644 index 6528786840c..00000000000 --- a/arch/sparc64/kernel/dtlb_base.S +++ /dev/null @@ -1,109 +0,0 @@ -/* $Id: dtlb_base.S,v 1.17 2001/10/11 22:33:52 davem Exp $ - * dtlb_base.S: Front end to DTLB miss replacement strategy. - * This is included directly into the trap table. - * - * Copyright (C) 1996,1998 David S. Miller (davem@redhat.com) - * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -#include <asm/pgtable.h> -#include <asm/mmu.h> - -/* %g1 TLB_SFSR (%g1 + %g1 == TLB_TAG_ACCESS) - * %g2 (KERN_HIGHBITS | KERN_LOWBITS) - * %g3 VPTE base (0xfffffffe00000000) Spitfire/Blackbird (44-bit VA space) - * (0xffe0000000000000) Cheetah (64-bit VA space) - * %g7 __pa(current->mm->pgd) - * - * The VPTE base value is completely magic, but note that - * few places in the kernel other than these TLB miss - * handlers know anything about the VPTE mechanism or - * how it works (see VPTE_SIZE, TASK_SIZE and PTRS_PER_PGD). - * Consider the 44-bit VADDR Ultra-I/II case as an example: - * - * VA[0 : (1<<43)] produce VPTE index [%g3 : 0] - * VA[0 : -(1<<43)] produce VPTE index [%g3-(1<<(43-PAGE_SHIFT+3)) : %g3] - * - * For Cheetah's 64-bit VADDR space this is: - * - * VA[0 : (1<<63)] produce VPTE index [%g3 : 0] - * VA[0 : -(1<<63)] produce VPTE index [%g3-(1<<(63-PAGE_SHIFT+3)) : %g3] - * - * If you're paying attention you'll notice that this means half of - * the VPTE table is above %g3 and half is below, low VA addresses - * map progressively upwards from %g3, and high VA addresses map - * progressively upwards towards %g3. This trick was needed to make - * the same 8 instruction handler work both for Spitfire/Blackbird's - * peculiar VA space hole configuration and the full 64-bit VA space - * one of Cheetah at the same time. - */ - -/* Ways we can get here: - * - * 1) Nucleus loads and stores to/from PA-->VA direct mappings. - * 2) Nucleus loads and stores to/from vmalloc() areas. - * 3) User loads and stores. - * 4) User space accesses by nucleus at tl0 - */ - -#if PAGE_SHIFT == 13 -/* - * To compute vpte offset, we need to do ((addr >> 13) << 3), - * which can be optimized to (addr >> 10) if bits 10/11/12 can - * be guaranteed to be 0 ... mmu_context.h does guarantee this - * by only using 10 bits in the hwcontext value. - */ -#define CREATE_VPTE_OFFSET1(r1, r2) nop -#define CREATE_VPTE_OFFSET2(r1, r2) \ - srax r1, 10, r2 -#else -#define CREATE_VPTE_OFFSET1(r1, r2) \ - srax r1, PAGE_SHIFT, r2 -#define CREATE_VPTE_OFFSET2(r1, r2) \ - sllx r2, 3, r2 -#endif - -/* DTLB ** ICACHE line 1: Quick user TLB misses */ - mov TLB_SFSR, %g1 - ldxa [%g1 + %g1] ASI_DMMU, %g4 ! Get TAG_ACCESS - andcc %g4, TAG_CONTEXT_BITS, %g0 ! From Nucleus? -from_tl1_trap: - rdpr %tl, %g5 ! For TL==3 test - CREATE_VPTE_OFFSET1(%g4, %g6) ! Create VPTE offset - be,pn %xcc, kvmap ! Yep, special processing - CREATE_VPTE_OFFSET2(%g4, %g6) ! Create VPTE offset - cmp %g5, 4 ! Last trap level? - -/* DTLB ** ICACHE line 2: User finish + quick kernel TLB misses */ - be,pn %xcc, longpath ! Yep, cannot risk VPTE miss - nop ! delay slot - ldxa [%g3 + %g6] ASI_S, %g5 ! Load VPTE -1: brgez,pn %g5, longpath ! Invalid, branch out - nop ! Delay-slot -9: stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB - retry ! Trap return - nop - -/* DTLB ** ICACHE line 3: winfixups+real_faults */ -longpath: - rdpr %pstate, %g5 ! Move into alternate globals - wrpr %g5, PSTATE_AG|PSTATE_MG, %pstate - rdpr %tl, %g4 ! See where we came from. - cmp %g4, 1 ! Is etrap/rtrap window fault? - mov TLB_TAG_ACCESS, %g4 ! Prepare for fault processing - ldxa [%g4] ASI_DMMU, %g5 ! Load faulting VA page - be,pt %xcc, sparc64_realfault_common ! Jump to normal fault handling - mov FAULT_CODE_DTLB, %g4 ! It was read from DTLB - -/* DTLB ** ICACHE line 4: Unused... */ - ba,a,pt %xcc, winfix_trampoline ! Call window fixup code - nop - nop - nop - nop - nop - nop - nop - -#undef CREATE_VPTE_OFFSET1 -#undef CREATE_VPTE_OFFSET2 diff --git a/arch/sparc64/kernel/dtlb_miss.S b/arch/sparc64/kernel/dtlb_miss.S new file mode 100644 index 00000000000..09a6a15a710 --- /dev/null +++ b/arch/sparc64/kernel/dtlb_miss.S @@ -0,0 +1,39 @@ +/* DTLB ** ICACHE line 1: Context 0 check and TSB load */ + ldxa [%g0] ASI_DMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer + ldxa [%g0] ASI_DMMU, %g6 ! Get TAG TARGET + srlx %g6, 48, %g5 ! Get context + sllx %g6, 22, %g6 ! Zero out context + brz,pn %g5, kvmap_dtlb ! Context 0 processing + srlx %g6, 22, %g6 ! Delay slot + TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry + cmp %g4, %g6 ! Compare TAG + +/* DTLB ** ICACHE line 2: TSB compare and TLB load */ + bne,pn %xcc, tsb_miss_dtlb ! Miss + mov FAULT_CODE_DTLB, %g3 + stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Load TLB + retry ! Trap done + nop + nop + nop + nop + +/* DTLB ** ICACHE line 3: */ + nop + nop + nop + nop + nop + nop + nop + nop + +/* DTLB ** ICACHE line 4: */ + nop + nop + nop + nop + nop + nop + nop + nop diff --git a/arch/sparc64/kernel/ebus.c b/arch/sparc64/kernel/ebus.c index 7991e919d8a..c69504aa638 100644 --- a/arch/sparc64/kernel/ebus.c +++ b/arch/sparc64/kernel/ebus.c @@ -277,10 +277,9 @@ static inline void *ebus_alloc(size_t size) { void *mem; - mem = kmalloc(size, GFP_ATOMIC); + mem = kzalloc(size, GFP_ATOMIC); if (!mem) panic("ebus_alloc: out of memory"); - memset((char *)mem, 0, size); return mem; } diff --git a/arch/sparc64/kernel/entry.S b/arch/sparc64/kernel/entry.S index a73553ae7e5..6d0b3ed77a0 100644 --- a/arch/sparc64/kernel/entry.S +++ b/arch/sparc64/kernel/entry.S @@ -50,7 +50,8 @@ do_fpdis: add %g0, %g0, %g0 ba,a,pt %xcc, rtrap_clr_l6 -1: ldub [%g6 + TI_FPSAVED], %g5 +1: TRAP_LOAD_THREAD_REG(%g6, %g1) + ldub [%g6 + TI_FPSAVED], %g5 wr %g0, FPRS_FEF, %fprs andcc %g5, FPRS_FEF, %g0 be,a,pt %icc, 1f @@ -96,10 +97,22 @@ do_fpdis: add %g6, TI_FPREGS + 0x80, %g1 faddd %f0, %f2, %f4 fmuld %f0, %f2, %f6 - ldxa [%g3] ASI_DMMU, %g5 + +661: ldxa [%g3] ASI_DMMU, %g5 + .section .sun4v_1insn_patch, "ax" + .word 661b + ldxa [%g3] ASI_MMU, %g5 + .previous + sethi %hi(sparc64_kern_sec_context), %g2 ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 - stxa %g2, [%g3] ASI_DMMU + +661: stxa %g2, [%g3] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g3] ASI_MMU + .previous + membar #Sync add %g6, TI_FPREGS + 0xc0, %g2 faddd %f0, %f2, %f8 @@ -125,11 +138,23 @@ do_fpdis: fzero %f32 mov SECONDARY_CONTEXT, %g3 fzero %f34 - ldxa [%g3] ASI_DMMU, %g5 + +661: ldxa [%g3] ASI_DMMU, %g5 + .section .sun4v_1insn_patch, "ax" + .word 661b + ldxa [%g3] ASI_MMU, %g5 + .previous + add %g6, TI_FPREGS, %g1 sethi %hi(sparc64_kern_sec_context), %g2 ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 - stxa %g2, [%g3] ASI_DMMU + +661: stxa %g2, [%g3] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g3] ASI_MMU + .previous + membar #Sync add %g6, TI_FPREGS + 0x40, %g2 faddd %f32, %f34, %f36 @@ -154,10 +179,22 @@ do_fpdis: nop 3: mov SECONDARY_CONTEXT, %g3 add %g6, TI_FPREGS, %g1 - ldxa [%g3] ASI_DMMU, %g5 + +661: ldxa [%g3] ASI_DMMU, %g5 + .section .sun4v_1insn_patch, "ax" + .word 661b + ldxa [%g3] ASI_MMU, %g5 + .previous + sethi %hi(sparc64_kern_sec_context), %g2 ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 - stxa %g2, [%g3] ASI_DMMU + +661: stxa %g2, [%g3] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g3] ASI_MMU + .previous + membar #Sync mov 0x40, %g2 membar #Sync @@ -168,7 +205,13 @@ do_fpdis: ldda [%g1 + %g2] ASI_BLK_S, %f48 membar #Sync fpdis_exit: - stxa %g5, [%g3] ASI_DMMU + +661: stxa %g5, [%g3] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g5, [%g3] ASI_MMU + .previous + membar #Sync fpdis_exit2: wr %g7, 0, %gsr @@ -189,6 +232,7 @@ fp_other_bounce: .globl do_fpother_check_fitos .align 32 do_fpother_check_fitos: + TRAP_LOAD_THREAD_REG(%g6, %g1) sethi %hi(fp_other_bounce - 4), %g7 or %g7, %lo(fp_other_bounce - 4), %g7 @@ -312,6 +356,7 @@ fitos_emul_fini: .globl do_fptrap .align 32 do_fptrap: + TRAP_LOAD_THREAD_REG(%g6, %g1) stx %fsr, [%g6 + TI_XFSR] do_fptrap_after_fsr: ldub [%g6 + TI_FPSAVED], %g3 @@ -321,10 +366,22 @@ do_fptrap_after_fsr: rd %gsr, %g3 stx %g3, [%g6 + TI_GSR] mov SECONDARY_CONTEXT, %g3 - ldxa [%g3] ASI_DMMU, %g5 + +661: ldxa [%g3] ASI_DMMU, %g5 + .section .sun4v_1insn_patch, "ax" + .word 661b + ldxa [%g3] ASI_MMU, %g5 + .previous + sethi %hi(sparc64_kern_sec_context), %g2 ldx [%g2 + %lo(sparc64_kern_sec_context)], %g2 - stxa %g2, [%g3] ASI_DMMU + +661: stxa %g2, [%g3] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g3] ASI_MMU + .previous + membar #Sync add %g6, TI_FPREGS, %g2 andcc %g1, FPRS_DL, %g0 @@ -339,7 +396,13 @@ do_fptrap_after_fsr: stda %f48, [%g2 + %g3] ASI_BLK_S 5: mov SECONDARY_CONTEXT, %g1 membar #Sync - stxa %g5, [%g1] ASI_DMMU + +661: stxa %g5, [%g1] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g5, [%g1] ASI_MMU + .previous + membar #Sync ba,pt %xcc, etrap wr %g0, 0, %fprs @@ -353,8 +416,6 @@ do_fptrap_after_fsr: * * With this method we can do most of the cross-call tlb/cache * flushing very quickly. - * - * Current CPU's IRQ worklist table is locked into %g6, don't touch. */ .text .align 32 @@ -378,6 +439,8 @@ do_ivec: sllx %g2, %g4, %g2 sllx %g4, 2, %g4 + TRAP_LOAD_IRQ_WORK(%g6, %g1) + lduw [%g6 + %g4], %g5 /* g5 = irq_work(cpu, pil) */ stw %g5, [%g3 + 0x00] /* bucket->irq_chain = g5 */ stw %g3, [%g6 + %g4] /* irq_work(cpu, pil) = bucket */ @@ -399,76 +462,6 @@ do_ivec_xcall: 1: jmpl %g3, %g0 nop - .globl save_alternate_globals -save_alternate_globals: /* %o0 = save_area */ - rdpr %pstate, %o5 - andn %o5, PSTATE_IE, %o1 - wrpr %o1, PSTATE_AG, %pstate - stx %g0, [%o0 + 0x00] - stx %g1, [%o0 + 0x08] - stx %g2, [%o0 + 0x10] - stx %g3, [%o0 + 0x18] - stx %g4, [%o0 + 0x20] - stx %g5, [%o0 + 0x28] - stx %g6, [%o0 + 0x30] - stx %g7, [%o0 + 0x38] - wrpr %o1, PSTATE_IG, %pstate - stx %g0, [%o0 + 0x40] - stx %g1, [%o0 + 0x48] - stx %g2, [%o0 + 0x50] - stx %g3, [%o0 + 0x58] - stx %g4, [%o0 + 0x60] - stx %g5, [%o0 + 0x68] - stx %g6, [%o0 + 0x70] - stx %g7, [%o0 + 0x78] - wrpr %o1, PSTATE_MG, %pstate - stx %g0, [%o0 + 0x80] - stx %g1, [%o0 + 0x88] - stx %g2, [%o0 + 0x90] - stx %g3, [%o0 + 0x98] - stx %g4, [%o0 + 0xa0] - stx %g5, [%o0 + 0xa8] - stx %g6, [%o0 + 0xb0] - stx %g7, [%o0 + 0xb8] - wrpr %o5, 0x0, %pstate - retl - nop - - .globl restore_alternate_globals -restore_alternate_globals: /* %o0 = save_area */ - rdpr %pstate, %o5 - andn %o5, PSTATE_IE, %o1 - wrpr %o1, PSTATE_AG, %pstate - ldx [%o0 + 0x00], %g0 - ldx [%o0 + 0x08], %g1 - ldx [%o0 + 0x10], %g2 - ldx [%o0 + 0x18], %g3 - ldx [%o0 + 0x20], %g4 - ldx [%o0 + 0x28], %g5 - ldx [%o0 + 0x30], %g6 - ldx [%o0 + 0x38], %g7 - wrpr %o1, PSTATE_IG, %pstate - ldx [%o0 + 0x40], %g0 - ldx [%o0 + 0x48], %g1 - ldx [%o0 + 0x50], %g2 - ldx [%o0 + 0x58], %g3 - ldx [%o0 + 0x60], %g4 - ldx [%o0 + 0x68], %g5 - ldx [%o0 + 0x70], %g6 - ldx [%o0 + 0x78], %g7 - wrpr %o1, PSTATE_MG, %pstate - ldx [%o0 + 0x80], %g0 - ldx [%o0 + 0x88], %g1 - ldx [%o0 + 0x90], %g2 - ldx [%o0 + 0x98], %g3 - ldx [%o0 + 0xa0], %g4 - ldx [%o0 + 0xa8], %g5 - ldx [%o0 + 0xb0], %g6 - ldx [%o0 + 0xb8], %g7 - wrpr %o5, 0x0, %pstate - retl - nop - .globl getcc, setcc getcc: ldx [%o0 + PT_V9_TSTATE], %o1 @@ -488,9 +481,24 @@ setcc: retl stx %o1, [%o0 + PT_V9_TSTATE] - .globl utrap, utrap_ill -utrap: brz,pn %g1, etrap + .globl utrap_trap +utrap_trap: /* %g3=handler,%g4=level */ + TRAP_LOAD_THREAD_REG(%g6, %g1) + ldx [%g6 + TI_UTRAPS], %g1 + brnz,pt %g1, invoke_utrap nop + + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + call bad_trap + add %sp, PTREGS_OFF, %o0 + ba,pt %xcc, rtrap + clr %l6 + +invoke_utrap: + sllx %g3, 3, %g3 + ldx [%g1 + %g3], %g1 save %sp, -128, %sp rdpr %tstate, %l6 rdpr %cwp, %l7 @@ -500,17 +508,6 @@ utrap: brz,pn %g1, etrap rdpr %tnpc, %l7 wrpr %g1, 0, %tnpc done -utrap_ill: - call bad_trap - add %sp, PTREGS_OFF, %o0 - ba,pt %xcc, rtrap - clr %l6 - - /* XXX Here is stuff we still need to write... -DaveM XXX */ - .globl netbsd_syscall -netbsd_syscall: - retl - nop /* We need to carefully read the error status, ACK * the errors, prevent recursive traps, and pass the @@ -1001,7 +998,7 @@ dcpe_icpe_tl1_common: * %g3: scratch * %g4: AFSR * %g5: AFAR - * %g6: current thread ptr + * %g6: unused, will have current thread ptr after etrap * %g7: scratch */ __cheetah_log_error: @@ -1539,13 +1536,14 @@ ret_from_syscall: 1: b,pt %xcc, ret_sys_call ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0 -sparc_exit: wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV), %pstate +sparc_exit: rdpr %pstate, %g2 + wrpr %g2, PSTATE_IE, %pstate rdpr %otherwin, %g1 rdpr %cansave, %g3 add %g3, %g1, %g3 wrpr %g3, 0x0, %cansave wrpr %g0, 0x0, %otherwin - wrpr %g0, (PSTATE_RMO | PSTATE_PEF | PSTATE_PRIV | PSTATE_IE), %pstate + wrpr %g2, 0x0, %pstate ba,pt %xcc, sys_exit stb %g0, [%g6 + TI_WSAVED] @@ -1690,3 +1688,138 @@ __flushw_user: restore %g0, %g0, %g0 2: retl nop + +#ifdef CONFIG_SMP + .globl hard_smp_processor_id +hard_smp_processor_id: +#endif + .globl real_hard_smp_processor_id +real_hard_smp_processor_id: + __GET_CPUID(%o0) + retl + nop + + /* %o0: devhandle + * %o1: devino + * + * returns %o0: sysino + */ + .globl sun4v_devino_to_sysino +sun4v_devino_to_sysino: + mov HV_FAST_INTR_DEVINO2SYSINO, %o5 + ta HV_FAST_TRAP + retl + mov %o1, %o0 + + /* %o0: sysino + * + * returns %o0: intr_enabled (HV_INTR_{DISABLED,ENABLED}) + */ + .globl sun4v_intr_getenabled +sun4v_intr_getenabled: + mov HV_FAST_INTR_GETENABLED, %o5 + ta HV_FAST_TRAP + retl + mov %o1, %o0 + + /* %o0: sysino + * %o1: intr_enabled (HV_INTR_{DISABLED,ENABLED}) + */ + .globl sun4v_intr_setenabled +sun4v_intr_setenabled: + mov HV_FAST_INTR_SETENABLED, %o5 + ta HV_FAST_TRAP + retl + nop + + /* %o0: sysino + * + * returns %o0: intr_state (HV_INTR_STATE_*) + */ + .globl sun4v_intr_getstate +sun4v_intr_getstate: + mov HV_FAST_INTR_GETSTATE, %o5 + ta HV_FAST_TRAP + retl + mov %o1, %o0 + + /* %o0: sysino + * %o1: intr_state (HV_INTR_STATE_*) + */ + .globl sun4v_intr_setstate +sun4v_intr_setstate: + mov HV_FAST_INTR_SETSTATE, %o5 + ta HV_FAST_TRAP + retl + nop + + /* %o0: sysino + * + * returns %o0: cpuid + */ + .globl sun4v_intr_gettarget +sun4v_intr_gettarget: + mov HV_FAST_INTR_GETTARGET, %o5 + ta HV_FAST_TRAP + retl + mov %o1, %o0 + + /* %o0: sysino + * %o1: cpuid + */ + .globl sun4v_intr_settarget +sun4v_intr_settarget: + mov HV_FAST_INTR_SETTARGET, %o5 + ta HV_FAST_TRAP + retl + nop + + /* %o0: type + * %o1: queue paddr + * %o2: num queue entries + * + * returns %o0: status + */ + .globl sun4v_cpu_qconf +sun4v_cpu_qconf: + mov HV_FAST_CPU_QCONF, %o5 + ta HV_FAST_TRAP + retl + nop + + /* returns %o0: status + */ + .globl sun4v_cpu_yield +sun4v_cpu_yield: + mov HV_FAST_CPU_YIELD, %o5 + ta HV_FAST_TRAP + retl + nop + + /* %o0: num cpus in cpu list + * %o1: cpu list paddr + * %o2: mondo block paddr + * + * returns %o0: status + */ + .globl sun4v_cpu_mondo_send +sun4v_cpu_mondo_send: + mov HV_FAST_CPU_MONDO_SEND, %o5 + ta HV_FAST_TRAP + retl + nop + + /* %o0: CPU ID + * + * returns %o0: -status if status non-zero, else + * %o0: cpu state as HV_CPU_STATE_* + */ + .globl sun4v_cpu_state +sun4v_cpu_state: + mov HV_FAST_CPU_STATE, %o5 + ta HV_FAST_TRAP + brnz,pn %o0, 1f + sub %g0, %o0, %o0 + mov %o1, %o0 +1: retl + nop diff --git a/arch/sparc64/kernel/etrap.S b/arch/sparc64/kernel/etrap.S index 0d8eba21111..149383835c2 100644 --- a/arch/sparc64/kernel/etrap.S +++ b/arch/sparc64/kernel/etrap.S @@ -31,6 +31,7 @@ .globl etrap, etrap_irq, etraptl1 etrap: rdpr %pil, %g2 etrap_irq: + TRAP_LOAD_THREAD_REG(%g6, %g1) rdpr %tstate, %g1 sllx %g2, 20, %g3 andcc %g1, TSTATE_PRIV, %g0 @@ -54,7 +55,31 @@ etrap_irq: rd %y, %g3 stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TNPC] st %g3, [%g2 + STACKFRAME_SZ + PT_V9_Y] - save %g2, -STACK_BIAS, %sp ! Ordering here is critical + + rdpr %cansave, %g1 + brnz,pt %g1, etrap_save + nop + + rdpr %cwp, %g1 + add %g1, 2, %g1 + wrpr %g1, %cwp + be,pt %xcc, etrap_user_spill + mov ASI_AIUP, %g3 + + rdpr %otherwin, %g3 + brz %g3, etrap_kernel_spill + mov ASI_AIUS, %g3 + +etrap_user_spill: + + wr %g3, 0x0, %asi + ldx [%g6 + TI_FLAGS], %g3 + and %g3, _TIF_32BIT, %g3 + brnz,pt %g3, etrap_user_spill_32bit + nop + ba,a,pt %xcc, etrap_user_spill_64bit + +etrap_save: save %g2, -STACK_BIAS, %sp mov %g6, %l6 bne,pn %xcc, 3f @@ -70,42 +95,56 @@ etrap_irq: wrpr %g2, 0, %wstate sethi %hi(sparc64_kern_pri_context), %g2 ldx [%g2 + %lo(sparc64_kern_pri_context)], %g3 - stxa %g3, [%l4] ASI_DMMU - flush %l6 - wr %g0, ASI_AIUS, %asi -2: wrpr %g0, 0x0, %tl - mov %g4, %l4 + +661: stxa %g3, [%l4] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g3, [%l4] ASI_MMU + .previous + + sethi %hi(KERNBASE), %l4 + flush %l4 + mov ASI_AIUS, %l7 +2: mov %g4, %l4 mov %g5, %l5 + add %g7, 4, %l2 + + /* Go to trap time globals so we can save them. */ +661: wrpr %g0, ETRAP_PSTATE1, %pstate + .section .sun4v_1insn_patch, "ax" + .word 661b + SET_GL(0) + .previous - mov %g7, %l2 - wrpr %g0, ETRAP_PSTATE1, %pstate stx %g1, [%sp + PTREGS_OFF + PT_V9_G1] stx %g2, [%sp + PTREGS_OFF + PT_V9_G2] + sllx %l7, 24, %l7 stx %g3, [%sp + PTREGS_OFF + PT_V9_G3] + rdpr %cwp, %l0 stx %g4, [%sp + PTREGS_OFF + PT_V9_G4] stx %g5, [%sp + PTREGS_OFF + PT_V9_G5] stx %g6, [%sp + PTREGS_OFF + PT_V9_G6] - stx %g7, [%sp + PTREGS_OFF + PT_V9_G7] + or %l7, %l0, %l7 + sethi %hi(TSTATE_RMO | TSTATE_PEF), %l0 + or %l7, %l0, %l7 + wrpr %l2, %tnpc + wrpr %l7, (TSTATE_PRIV | TSTATE_IE), %tstate stx %i0, [%sp + PTREGS_OFF + PT_V9_I0] stx %i1, [%sp + PTREGS_OFF + PT_V9_I1] stx %i2, [%sp + PTREGS_OFF + PT_V9_I2] stx %i3, [%sp + PTREGS_OFF + PT_V9_I3] stx %i4, [%sp + PTREGS_OFF + PT_V9_I4] stx %i5, [%sp + PTREGS_OFF + PT_V9_I5] - stx %i6, [%sp + PTREGS_OFF + PT_V9_I6] - stx %i7, [%sp + PTREGS_OFF + PT_V9_I7] - wrpr %g0, ETRAP_PSTATE2, %pstate mov %l6, %g6 -#ifdef CONFIG_SMP - mov TSB_REG, %g3 - ldxa [%g3] ASI_IMMU, %g5 -#endif - jmpl %l2 + 0x4, %g0 - ldx [%g6 + TI_TASK], %g4 + stx %i7, [%sp + PTREGS_OFF + PT_V9_I7] + LOAD_PER_CPU_BASE(%g5, %g6, %g4, %g3, %l1) + ldx [%g6 + TI_TASK], %g4 + done -3: ldub [%l6 + TI_FPDEPTH], %l5 +3: mov ASI_P, %l7 + ldub [%l6 + TI_FPDEPTH], %l5 add %l6, TI_FPSAVED + 1, %l4 srl %l5, 1, %l3 add %l5, 2, %l5 @@ -125,6 +164,7 @@ etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself. * 0x58 TL4's TT * 0x60 TL */ + TRAP_LOAD_THREAD_REG(%g6, %g1) sub %sp, ((4 * 8) * 4) + 8, %g2 rdpr %tl, %g1 @@ -148,6 +188,11 @@ etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself. rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x38] + sethi %hi(is_sun4v), %g3 + lduw [%g3 + %lo(is_sun4v)], %g3 + brnz,pn %g3, finish_tl1_capture + nop + wrpr %g0, 3, %tl rdpr %tstate, %g3 stx %g3, [%g2 + STACK_BIAS + 0x40] @@ -168,91 +213,20 @@ etraptl1: /* Save tstate/tpc/tnpc of TL 1-->4 and the tl register itself. rdpr %tt, %g3 stx %g3, [%g2 + STACK_BIAS + 0x78] - wrpr %g1, %tl stx %g1, [%g2 + STACK_BIAS + 0x80] +finish_tl1_capture: + wrpr %g0, 1, %tl +661: nop + .section .sun4v_1insn_patch, "ax" + .word 661b + SET_GL(1) + .previous + rdpr %tstate, %g1 sub %g2, STACKFRAME_SZ + TRACEREG_SZ - STACK_BIAS, %g2 ba,pt %xcc, 1b andcc %g1, TSTATE_PRIV, %g0 - .align 64 - .globl scetrap -scetrap: rdpr %pil, %g2 - rdpr %tstate, %g1 - sllx %g2, 20, %g3 - andcc %g1, TSTATE_PRIV, %g0 - or %g1, %g3, %g1 - bne,pn %xcc, 1f - sub %sp, (STACKFRAME_SZ+TRACEREG_SZ-STACK_BIAS), %g2 - wrpr %g0, 7, %cleanwin - - sllx %g1, 51, %g3 - sethi %hi(TASK_REGOFF), %g2 - or %g2, %lo(TASK_REGOFF), %g2 - brlz,pn %g3, 1f - add %g6, %g2, %g2 - wr %g0, 0, %fprs -1: rdpr %tpc, %g3 - stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TSTATE] - - rdpr %tnpc, %g1 - stx %g3, [%g2 + STACKFRAME_SZ + PT_V9_TPC] - stx %g1, [%g2 + STACKFRAME_SZ + PT_V9_TNPC] - save %g2, -STACK_BIAS, %sp ! Ordering here is critical - mov %g6, %l6 - bne,pn %xcc, 2f - mov ASI_P, %l7 - rdpr %canrestore, %g3 - - rdpr %wstate, %g2 - wrpr %g0, 0, %canrestore - sll %g2, 3, %g2 - mov PRIMARY_CONTEXT, %l4 - wrpr %g3, 0, %otherwin - wrpr %g2, 0, %wstate - sethi %hi(sparc64_kern_pri_context), %g2 - ldx [%g2 + %lo(sparc64_kern_pri_context)], %g3 - stxa %g3, [%l4] ASI_DMMU - flush %l6 - - mov ASI_AIUS, %l7 -2: mov %g4, %l4 - mov %g5, %l5 - add %g7, 0x4, %l2 - wrpr %g0, ETRAP_PSTATE1, %pstate - stx %g1, [%sp + PTREGS_OFF + PT_V9_G1] - stx %g2, [%sp + PTREGS_OFF + PT_V9_G2] - sllx %l7, 24, %l7 - - stx %g3, [%sp + PTREGS_OFF + PT_V9_G3] - rdpr %cwp, %l0 - stx %g4, [%sp + PTREGS_OFF + PT_V9_G4] - stx %g5, [%sp + PTREGS_OFF + PT_V9_G5] - stx %g6, [%sp + PTREGS_OFF + PT_V9_G6] - stx %g7, [%sp + PTREGS_OFF + PT_V9_G7] - or %l7, %l0, %l7 - sethi %hi(TSTATE_RMO | TSTATE_PEF), %l0 - - or %l7, %l0, %l7 - wrpr %l2, %tnpc - wrpr %l7, (TSTATE_PRIV | TSTATE_IE), %tstate - stx %i0, [%sp + PTREGS_OFF + PT_V9_I0] - stx %i1, [%sp + PTREGS_OFF + PT_V9_I1] - stx %i2, [%sp + PTREGS_OFF + PT_V9_I2] - stx %i3, [%sp + PTREGS_OFF + PT_V9_I3] - stx %i4, [%sp + PTREGS_OFF + PT_V9_I4] - - stx %i5, [%sp + PTREGS_OFF + PT_V9_I5] - stx %i6, [%sp + PTREGS_OFF + PT_V9_I6] - mov %l6, %g6 - stx %i7, [%sp + PTREGS_OFF + PT_V9_I7] -#ifdef CONFIG_SMP - mov TSB_REG, %g3 - ldxa [%g3] ASI_IMMU, %g5 -#endif - ldx [%g6 + TI_TASK], %g4 - done - #undef TASK_REGOFF #undef ETRAP_PSTATE1 diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S index b49dcd4504b..3eadac5e171 100644 --- a/arch/sparc64/kernel/head.S +++ b/arch/sparc64/kernel/head.S @@ -26,6 +26,7 @@ #include <asm/head.h> #include <asm/ttable.h> #include <asm/mmu.h> +#include <asm/cpudata.h> /* This section from from _start to sparc64_boot_end should fit into * 0x0000000000404000 to 0x0000000000408000. @@ -94,12 +95,17 @@ sparc64_boot: wrpr %g1, 0x0, %pstate ba,a,pt %xcc, 1f - .globl prom_finddev_name, prom_chosen_path - .globl prom_getprop_name, prom_mmu_name - .globl prom_callmethod_name, prom_translate_name + .globl prom_finddev_name, prom_chosen_path, prom_root_node + .globl prom_getprop_name, prom_mmu_name, prom_peer_name + .globl prom_callmethod_name, prom_translate_name, prom_root_compatible .globl prom_map_name, prom_unmap_name, prom_mmu_ihandle_cache .globl prom_boot_mapped_pc, prom_boot_mapping_mode .globl prom_boot_mapping_phys_high, prom_boot_mapping_phys_low + .globl is_sun4v +prom_peer_name: + .asciz "peer" +prom_compatible_name: + .asciz "compatible" prom_finddev_name: .asciz "finddevice" prom_chosen_path: @@ -116,7 +122,13 @@ prom_map_name: .asciz "map" prom_unmap_name: .asciz "unmap" +prom_sun4v_name: + .asciz "sun4v" .align 4 +prom_root_compatible: + .skip 64 +prom_root_node: + .word 0 prom_mmu_ihandle_cache: .word 0 prom_boot_mapped_pc: @@ -128,8 +140,54 @@ prom_boot_mapping_phys_high: .xword 0 prom_boot_mapping_phys_low: .xword 0 +is_sun4v: + .word 0 1: rd %pc, %l0 + + mov (1b - prom_peer_name), %l1 + sub %l0, %l1, %l1 + mov 0, %l2 + + /* prom_root_node = prom_peer(0) */ + stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "peer" + mov 1, %l3 + stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1 + stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 + stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, 0 + stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 + call %l7 + add %sp, (2047 + 128), %o0 ! argument array + + ldx [%sp + 2047 + 128 + 0x20], %l4 ! prom root node + mov (1b - prom_root_node), %l1 + sub %l0, %l1, %l1 + stw %l4, [%l1] + + mov (1b - prom_getprop_name), %l1 + mov (1b - prom_compatible_name), %l2 + mov (1b - prom_root_compatible), %l5 + sub %l0, %l1, %l1 + sub %l0, %l2, %l2 + sub %l0, %l5, %l5 + + /* prom_getproperty(prom_root_node, "compatible", + * &prom_root_compatible, 64) + */ + stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop" + mov 4, %l3 + stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4 + mov 1, %l3 + stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 + stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, prom_root_node + stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible" + stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_root_compatible + mov 64, %l3 + stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size + stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 + call %l7 + add %sp, (2047 + 128), %o0 ! argument array + mov (1b - prom_finddev_name), %l1 mov (1b - prom_chosen_path), %l2 mov (1b - prom_boot_mapped_pc), %l3 @@ -238,6 +296,27 @@ prom_boot_mapping_phys_low: add %sp, (192 + 128), %sp sparc64_boot_after_remap: + sethi %hi(prom_root_compatible), %g1 + or %g1, %lo(prom_root_compatible), %g1 + sethi %hi(prom_sun4v_name), %g7 + or %g7, %lo(prom_sun4v_name), %g7 + mov 5, %g3 +1: ldub [%g7], %g2 + ldub [%g1], %g4 + cmp %g2, %g4 + bne,pn %icc, 2f + add %g7, 1, %g7 + subcc %g3, 1, %g3 + bne,pt %xcc, 1b + add %g1, 1, %g1 + + sethi %hi(is_sun4v), %g1 + or %g1, %lo(is_sun4v), %g1 + mov 1, %g7 + stw %g7, [%g1] + +2: + BRANCH_IF_SUN4V(g1, jump_to_sun4u_init) BRANCH_IF_CHEETAH_BASE(g1,g7,cheetah_boot) BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,cheetah_plus_boot) ba,pt %xcc, spitfire_boot @@ -301,20 +380,58 @@ jump_to_sun4u_init: nop sun4u_init: + BRANCH_IF_SUN4V(g1, sun4v_init) + /* Set ctx 0 */ - mov PRIMARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU - membar #Sync + mov PRIMARY_CONTEXT, %g7 + stxa %g0, [%g7] ASI_DMMU + membar #Sync - mov SECONDARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU + mov SECONDARY_CONTEXT, %g7 + stxa %g0, [%g7] ASI_DMMU membar #Sync - BRANCH_IF_ANY_CHEETAH(g1,g7,cheetah_tlb_fixup) + ba,pt %xcc, sun4u_continue + nop + +sun4v_init: + /* Set ctx 0 */ + mov PRIMARY_CONTEXT, %g7 + stxa %g0, [%g7] ASI_MMU + membar #Sync + + mov SECONDARY_CONTEXT, %g7 + stxa %g0, [%g7] ASI_MMU + membar #Sync + ba,pt %xcc, niagara_tlb_fixup + nop + +sun4u_continue: + BRANCH_IF_ANY_CHEETAH(g1, g7, cheetah_tlb_fixup) ba,pt %xcc, spitfire_tlb_fixup nop +niagara_tlb_fixup: + mov 3, %g2 /* Set TLB type to hypervisor. */ + sethi %hi(tlb_type), %g1 + stw %g2, [%g1 + %lo(tlb_type)] + + /* Patch copy/clear ops. */ + call niagara_patch_copyops + nop + call niagara_patch_bzero + nop + call niagara_patch_pageops + nop + + /* Patch TLB/cache ops. */ + call hypervisor_patch_cachetlbops + nop + + ba,pt %xcc, tlb_fixup_done + nop + cheetah_tlb_fixup: mov 2, %g2 /* Set TLB type to cheetah+. */ BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,1f) @@ -411,85 +528,55 @@ setup_trap_table: wrpr %g0, 15, %pil /* Make the firmware call to jump over to the Linux trap table. */ - call prom_set_trap_table - sethi %hi(sparc64_ttable_tl0), %o0 + sethi %hi(is_sun4v), %o0 + lduw [%o0 + %lo(is_sun4v)], %o0 + brz,pt %o0, 1f + nop - /* Start using proper page size encodings in ctx register. */ - sethi %hi(sparc64_kern_pri_context), %g3 - ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 - mov PRIMARY_CONTEXT, %g1 - stxa %g2, [%g1] ASI_DMMU - membar #Sync + TRAP_LOAD_TRAP_BLOCK(%g2, %g3) + add %g2, TRAP_PER_CPU_FAULT_INFO, %g2 + stxa %g2, [%g0] ASI_SCRATCHPAD - /* The Linux trap handlers expect various trap global registers - * to be setup with some fixed values. So here we set these - * up very carefully. These globals are: - * - * Alternate Globals (PSTATE_AG): - * - * %g6 --> current_thread_info() - * - * MMU Globals (PSTATE_MG): - * - * %g1 --> TLB_SFSR - * %g2 --> ((_PAGE_VALID | _PAGE_SZ4MB | - * _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W) - * ^ 0xfffff80000000000) - * (this %g2 value is used for computing the PAGE_OFFSET kernel - * TLB entries quickly, the virtual address of the fault XOR'd - * with this %g2 value is the PTE to load into the TLB) - * %g3 --> VPTE_BASE_CHEETAH or VPTE_BASE_SPITFIRE + /* Compute physical address: * - * Interrupt Globals (PSTATE_IG, setup by init_irqwork_curcpu()): - * - * %g6 --> __irq_work[smp_processor_id()] + * paddr = kern_base + (mmfsa_vaddr - KERNBASE) */ + sethi %hi(KERNBASE), %g3 + sub %g2, %g3, %g2 + sethi %hi(kern_base), %g3 + ldx [%g3 + %lo(kern_base)], %g3 + add %g2, %g3, %o1 - rdpr %pstate, %o1 - mov %g6, %o2 - wrpr %o1, PSTATE_AG, %pstate - mov %o2, %g6 - -#define KERN_HIGHBITS ((_PAGE_VALID|_PAGE_SZ4MB)^0xfffff80000000000) -#define KERN_LOWBITS (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W) - wrpr %o1, PSTATE_MG, %pstate - mov TSB_REG, %g1 - stxa %g0, [%g1] ASI_DMMU - membar #Sync - stxa %g0, [%g1] ASI_IMMU - membar #Sync - mov TLB_SFSR, %g1 - sethi %uhi(KERN_HIGHBITS), %g2 - or %g2, %ulo(KERN_HIGHBITS), %g2 - sllx %g2, 32, %g2 - or %g2, KERN_LOWBITS, %g2 - - BRANCH_IF_ANY_CHEETAH(g3,g7,8f) - ba,pt %xcc, 9f + call prom_set_trap_table_sun4v + sethi %hi(sparc64_ttable_tl0), %o0 + + ba,pt %xcc, 2f nop -8: - sethi %uhi(VPTE_BASE_CHEETAH), %g3 - or %g3, %ulo(VPTE_BASE_CHEETAH), %g3 - ba,pt %xcc, 2f - sllx %g3, 32, %g3 +1: call prom_set_trap_table + sethi %hi(sparc64_ttable_tl0), %o0 -9: - sethi %uhi(VPTE_BASE_SPITFIRE), %g3 - or %g3, %ulo(VPTE_BASE_SPITFIRE), %g3 - sllx %g3, 32, %g3 + /* Start using proper page size encodings in ctx register. */ +2: sethi %hi(sparc64_kern_pri_context), %g3 + ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 -2: - clr %g7 -#undef KERN_HIGHBITS -#undef KERN_LOWBITS + mov PRIMARY_CONTEXT, %g1 + +661: stxa %g2, [%g1] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g1] ASI_MMU + .previous + + membar #Sync /* Kill PROM timer */ sethi %hi(0x80000000), %o2 sllx %o2, 32, %o2 wr %o2, 0, %tick_cmpr - BRANCH_IF_ANY_CHEETAH(o2,o3,1f) + BRANCH_IF_SUN4V(o2, 1f) + BRANCH_IF_ANY_CHEETAH(o2, o3, 1f) ba,pt %xcc, 2f nop @@ -502,7 +589,6 @@ setup_trap_table: 2: wrpr %g0, %g0, %wstate - wrpr %o1, 0x0, %pstate call init_irqwork_curcpu nop @@ -517,7 +603,7 @@ setup_trap_table: restore .globl setup_tba -setup_tba: /* i0 = is_starfire */ +setup_tba: save %sp, -192, %sp /* The boot processor is the only cpu which invokes this @@ -536,31 +622,35 @@ setup_tba: /* i0 = is_starfire */ restore sparc64_boot_end: -#include "systbls.S" #include "ktlb.S" +#include "tsb.S" #include "etrap.S" #include "rtrap.S" #include "winfixup.S" #include "entry.S" +#include "sun4v_tlb_miss.S" +#include "sun4v_ivec.S" /* * The following skip makes sure the trap table in ttable.S is aligned * on a 32K boundary as required by the v9 specs for TBA register. + * + * We align to a 32K boundary, then we have the 32K kernel TSB, + * then the 32K aligned trap table. */ 1: .skip 0x4000 + _start - 1b -#ifdef CONFIG_SBUS -/* This is just a hack to fool make depend config.h discovering - strategy: As the .S files below need config.h, but - make depend does not find it for them, we include config.h - in head.S */ -#endif + .globl swapper_tsb +swapper_tsb: + .skip (32 * 1024) ! 0x0000000000408000 #include "ttable.S" +#include "systbls.S" + .data .align 8 .globl prom_tba, tlb_type diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c index 233526ba3ab..11e645c9ec5 100644 --- a/arch/sparc64/kernel/irq.c +++ b/arch/sparc64/kernel/irq.c @@ -21,6 +21,7 @@ #include <linux/delay.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> +#include <linux/bootmem.h> #include <asm/ptrace.h> #include <asm/processor.h> @@ -39,6 +40,7 @@ #include <asm/cache.h> #include <asm/cpudata.h> #include <asm/auxio.h> +#include <asm/head.h> #ifdef CONFIG_SMP static void distribute_irqs(void); @@ -115,9 +117,7 @@ int show_interrupts(struct seq_file *p, void *v) #ifndef CONFIG_SMP seq_printf(p, "%10u ", kstat_irqs(i)); #else - for (j = 0; j < NR_CPUS; j++) { - if (!cpu_online(j)) - continue; + for_each_online_cpu(j) { seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); } @@ -136,12 +136,48 @@ out_unlock: return 0; } +extern unsigned long real_hard_smp_processor_id(void); + +static unsigned int sun4u_compute_tid(unsigned long imap, unsigned long cpuid) +{ + unsigned int tid; + + if (this_is_starfire) { + tid = starfire_translate(imap, cpuid); + tid <<= IMAP_TID_SHIFT; + tid &= IMAP_TID_UPA; + } else { + if (tlb_type == cheetah || tlb_type == cheetah_plus) { + unsigned long ver; + + __asm__ ("rdpr %%ver, %0" : "=r" (ver)); + if ((ver >> 32UL) == __JALAPENO_ID || + (ver >> 32UL) == __SERRANO_ID) { + tid = cpuid << IMAP_TID_SHIFT; + tid &= IMAP_TID_JBUS; + } else { + unsigned int a = cpuid & 0x1f; + unsigned int n = (cpuid >> 5) & 0x1f; + + tid = ((a << IMAP_AID_SHIFT) | + (n << IMAP_NID_SHIFT)); + tid &= (IMAP_AID_SAFARI | + IMAP_NID_SAFARI);; + } + } else { + tid = cpuid << IMAP_TID_SHIFT; + tid &= IMAP_TID_UPA; + } + } + + return tid; +} + /* Now these are always passed a true fully specified sun4u INO. */ void enable_irq(unsigned int irq) { struct ino_bucket *bucket = __bucket(irq); - unsigned long imap; - unsigned long tid; + unsigned long imap, cpuid; imap = bucket->imap; if (imap == 0UL) @@ -149,47 +185,38 @@ void enable_irq(unsigned int irq) preempt_disable(); - if (tlb_type == cheetah || tlb_type == cheetah_plus) { - unsigned long ver; - - __asm__ ("rdpr %%ver, %0" : "=r" (ver)); - if ((ver >> 32) == 0x003e0016) { - /* We set it to our JBUS ID. */ - __asm__ __volatile__("ldxa [%%g0] %1, %0" - : "=r" (tid) - : "i" (ASI_JBUS_CONFIG)); - tid = ((tid & (0x1fUL<<17)) << 9); - tid &= IMAP_TID_JBUS; - } else { - /* We set it to our Safari AID. */ - __asm__ __volatile__("ldxa [%%g0] %1, %0" - : "=r" (tid) - : "i" (ASI_SAFARI_CONFIG)); - tid = ((tid & (0x3ffUL<<17)) << 9); - tid &= IMAP_AID_SAFARI; - } - } else if (this_is_starfire == 0) { - /* We set it to our UPA MID. */ - __asm__ __volatile__("ldxa [%%g0] %1, %0" - : "=r" (tid) - : "i" (ASI_UPA_CONFIG)); - tid = ((tid & UPA_CONFIG_MID) << 9); - tid &= IMAP_TID_UPA; + /* This gets the physical processor ID, even on uniprocessor, + * so we can always program the interrupt target correctly. + */ + cpuid = real_hard_smp_processor_id(); + + if (tlb_type == hypervisor) { + unsigned int ino = __irq_ino(irq); + int err; + + err = sun4v_intr_settarget(ino, cpuid); + if (err != HV_EOK) + printk("sun4v_intr_settarget(%x,%lu): err(%d)\n", + ino, cpuid, err); + err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED); + if (err != HV_EOK) + printk("sun4v_intr_setenabled(%x): err(%d)\n", + ino, err); } else { - tid = (starfire_translate(imap, smp_processor_id()) << 26); - tid &= IMAP_TID_UPA; + unsigned int tid = sun4u_compute_tid(imap, cpuid); + + /* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product + * of this SYSIO's preconfigured IGN in the SYSIO Control + * Register, the hardware just mirrors that value here. + * However for Graphics and UPA Slave devices the full + * IMAP_INR field can be set by the programmer here. + * + * Things like FFB can now be handled via the new IRQ + * mechanism. + */ + upa_writel(tid | IMAP_VALID, imap); } - /* NOTE NOTE NOTE, IGN and INO are read-only, IGN is a product - * of this SYSIO's preconfigured IGN in the SYSIO Control - * Register, the hardware just mirrors that value here. - * However for Graphics and UPA Slave devices the full - * IMAP_INR field can be set by the programmer here. - * - * Things like FFB can now be handled via the new IRQ mechanism. - */ - upa_writel(tid | IMAP_VALID, imap); - preempt_enable(); } @@ -201,16 +228,26 @@ void disable_irq(unsigned int irq) imap = bucket->imap; if (imap != 0UL) { - u32 tmp; + if (tlb_type == hypervisor) { + unsigned int ino = __irq_ino(irq); + int err; + + err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED); + if (err != HV_EOK) + printk("sun4v_intr_setenabled(%x): " + "err(%d)\n", ino, err); + } else { + u32 tmp; - /* NOTE: We do not want to futz with the IRQ clear registers - * and move the state to IDLE, the SCSI code does call - * disable_irq() to assure atomicity in the queue cmd - * SCSI adapter driver code. Thus we'd lose interrupts. - */ - tmp = upa_readl(imap); - tmp &= ~IMAP_VALID; - upa_writel(tmp, imap); + /* NOTE: We do not want to futz with the IRQ clear registers + * and move the state to IDLE, the SCSI code does call + * disable_irq() to assure atomicity in the queue cmd + * SCSI adapter driver code. Thus we'd lose interrupts. + */ + tmp = upa_readl(imap); + tmp &= ~IMAP_VALID; + upa_writel(tmp, imap); + } } } @@ -248,6 +285,8 @@ unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long return __irq(&pil0_dummy_bucket); } + BUG_ON(tlb_type == hypervisor); + /* RULE: Both must be specified in all other cases. */ if (iclr == 0UL || imap == 0UL) { prom_printf("Invalid build_irq %d %d %016lx %016lx\n", @@ -275,12 +314,11 @@ unsigned int build_irq(int pil, int inofixup, unsigned long iclr, unsigned long goto out; } - bucket->irq_info = kmalloc(sizeof(struct irq_desc), GFP_ATOMIC); + bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC); if (!bucket->irq_info) { prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n"); prom_halt(); } - memset(bucket->irq_info, 0, sizeof(struct irq_desc)); /* Ok, looks good, set it up. Don't touch the irq_chain or * the pending flag. @@ -294,6 +332,37 @@ out: return __irq(bucket); } +unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino, int pil, unsigned char flags) +{ + struct ino_bucket *bucket; + unsigned long sysino; + + sysino = sun4v_devino_to_sysino(devhandle, devino); + + bucket = &ivector_table[sysino]; + + /* Catch accidental accesses to these things. IMAP/ICLR handling + * is done by hypervisor calls on sun4v platforms, not by direct + * register accesses. + * + * But we need to make them look unique for the disable_irq() logic + * in free_irq(). + */ + bucket->imap = ~0UL - sysino; + bucket->iclr = ~0UL - sysino; + + bucket->pil = pil; + bucket->flags = flags; + + bucket->irq_info = kzalloc(sizeof(struct irq_desc), GFP_ATOMIC); + if (!bucket->irq_info) { + prom_printf("IRQ: Error, kmalloc(irq_desc) failed.\n"); + prom_halt(); + } + + return __irq(bucket); +} + static void atomic_bucket_insert(struct ino_bucket *bucket) { unsigned long pstate; @@ -482,7 +551,6 @@ void free_irq(unsigned int irq, void *dev_id) bucket = __bucket(irq); if (bucket != &pil0_dummy_bucket) { struct irq_desc *desc = bucket->irq_info; - unsigned long imap = bucket->imap; int ent, i; for (i = 0; i < MAX_IRQ_DESC_ACTION; i++) { @@ -495,6 +563,8 @@ void free_irq(unsigned int irq, void *dev_id) } if (!desc->action_active_mask) { + unsigned long imap = bucket->imap; + /* This unique interrupt source is now inactive. */ bucket->flags &= ~IBF_ACTIVE; @@ -592,7 +662,18 @@ static void process_bucket(int irq, struct ino_bucket *bp, struct pt_regs *regs) break; } if (bp->pil != 0) { - upa_writel(ICLR_IDLE, bp->iclr); + if (tlb_type == hypervisor) { + unsigned int ino = __irq_ino(bp); + int err; + + err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE); + if (err != HV_EOK) + printk("sun4v_intr_setstate(%x): " + "err(%d)\n", ino, err); + } else { + upa_writel(ICLR_IDLE, bp->iclr); + } + /* Test and add entropy */ if (random & SA_SAMPLE_RANDOM) add_interrupt_randomness(irq); @@ -646,7 +727,7 @@ void handler_irq(int irq, struct pt_regs *regs) } #ifdef CONFIG_BLK_DEV_FD -extern irqreturn_t floppy_interrupt(int, void *, struct pt_regs *);; +extern irqreturn_t floppy_interrupt(int, void *, struct pt_regs *); /* XXX No easy way to include asm/floppy.h XXX */ extern unsigned char *pdma_vaddr; @@ -694,7 +775,7 @@ irqreturn_t sparc_floppy_irq(int irq, void *dev_cookie, struct pt_regs *regs) val = readb(auxio_register); val |= AUXIO_AUX1_FTCNT; writeb(val, auxio_register); - val &= AUXIO_AUX1_FTCNT; + val &= ~AUXIO_AUX1_FTCNT; writeb(val, auxio_register); doing_pdma = 0; @@ -727,25 +808,23 @@ EXPORT_SYMBOL(probe_irq_off); static int retarget_one_irq(struct irqaction *p, int goal_cpu) { struct ino_bucket *bucket = get_ino_in_irqaction(p) + ivector_table; - unsigned long imap = bucket->imap; - unsigned int tid; while (!cpu_online(goal_cpu)) { if (++goal_cpu >= NR_CPUS) goal_cpu = 0; } - if (tlb_type == cheetah || tlb_type == cheetah_plus) { - tid = goal_cpu << 26; - tid &= IMAP_AID_SAFARI; - } else if (this_is_starfire == 0) { - tid = goal_cpu << 26; - tid &= IMAP_TID_UPA; + if (tlb_type == hypervisor) { + unsigned int ino = __irq_ino(bucket); + + sun4v_intr_settarget(ino, goal_cpu); + sun4v_intr_setenabled(ino, HV_INTR_ENABLED); } else { - tid = (starfire_translate(imap, goal_cpu) << 26); - tid &= IMAP_TID_UPA; + unsigned long imap = bucket->imap; + unsigned int tid = sun4u_compute_tid(imap, goal_cpu); + + upa_writel(tid | IMAP_VALID, imap); } - upa_writel(tid | IMAP_VALID, imap); do { if (++goal_cpu >= NR_CPUS) @@ -848,33 +927,114 @@ static void kill_prom_timer(void) void init_irqwork_curcpu(void) { - register struct irq_work_struct *workp asm("o2"); - register unsigned long tmp asm("o3"); int cpu = hard_smp_processor_id(); - memset(__irq_work + cpu, 0, sizeof(*workp)); - - /* Make sure we are called with PSTATE_IE disabled. */ - __asm__ __volatile__("rdpr %%pstate, %0\n\t" - : "=r" (tmp)); - if (tmp & PSTATE_IE) { - prom_printf("BUG: init_irqwork_curcpu() called with " - "PSTATE_IE enabled, bailing.\n"); - __asm__ __volatile__("mov %%i7, %0\n\t" - : "=r" (tmp)); - prom_printf("BUG: Called from %lx\n", tmp); + memset(__irq_work + cpu, 0, sizeof(struct irq_work_struct)); +} + +static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type) +{ + unsigned long num_entries = 128; + unsigned long status; + + status = sun4v_cpu_qconf(type, paddr, num_entries); + if (status != HV_EOK) { + prom_printf("SUN4V: sun4v_cpu_qconf(%lu:%lx:%lu) failed, " + "err %lu\n", type, paddr, num_entries, status); prom_halt(); } +} - /* Set interrupt globals. */ - workp = &__irq_work[cpu]; - __asm__ __volatile__( - "rdpr %%pstate, %0\n\t" - "wrpr %0, %1, %%pstate\n\t" - "mov %2, %%g6\n\t" - "wrpr %0, 0x0, %%pstate\n\t" - : "=&r" (tmp) - : "i" (PSTATE_IG), "r" (workp)); +static void __cpuinit sun4v_register_mondo_queues(int this_cpu) +{ + struct trap_per_cpu *tb = &trap_block[this_cpu]; + + register_one_mondo(tb->cpu_mondo_pa, HV_CPU_QUEUE_CPU_MONDO); + register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO); + register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR); + register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR); +} + +static void __cpuinit alloc_one_mondo(unsigned long *pa_ptr, int use_bootmem) +{ + void *page; + + if (use_bootmem) + page = alloc_bootmem_low_pages(PAGE_SIZE); + else + page = (void *) get_zeroed_page(GFP_ATOMIC); + + if (!page) { + prom_printf("SUN4V: Error, cannot allocate mondo queue.\n"); + prom_halt(); + } + + *pa_ptr = __pa(page); +} + +static void __cpuinit alloc_one_kbuf(unsigned long *pa_ptr, int use_bootmem) +{ + void *page; + + if (use_bootmem) + page = alloc_bootmem_low_pages(PAGE_SIZE); + else + page = (void *) get_zeroed_page(GFP_ATOMIC); + + if (!page) { + prom_printf("SUN4V: Error, cannot allocate kbuf page.\n"); + prom_halt(); + } + + *pa_ptr = __pa(page); +} + +static void __cpuinit init_cpu_send_mondo_info(struct trap_per_cpu *tb, int use_bootmem) +{ +#ifdef CONFIG_SMP + void *page; + + BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64)); + + if (use_bootmem) + page = alloc_bootmem_low_pages(PAGE_SIZE); + else + page = (void *) get_zeroed_page(GFP_ATOMIC); + + if (!page) { + prom_printf("SUN4V: Error, cannot allocate cpu mondo page.\n"); + prom_halt(); + } + + tb->cpu_mondo_block_pa = __pa(page); + tb->cpu_list_pa = __pa(page + 64); +#endif +} + +/* Allocate and register the mondo and error queues for this cpu. */ +void __cpuinit sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load) +{ + struct trap_per_cpu *tb = &trap_block[cpu]; + + if (alloc) { + alloc_one_mondo(&tb->cpu_mondo_pa, use_bootmem); + alloc_one_mondo(&tb->dev_mondo_pa, use_bootmem); + alloc_one_mondo(&tb->resum_mondo_pa, use_bootmem); + alloc_one_kbuf(&tb->resum_kernel_buf_pa, use_bootmem); + alloc_one_mondo(&tb->nonresum_mondo_pa, use_bootmem); + alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, use_bootmem); + + init_cpu_send_mondo_info(tb, use_bootmem); + } + + if (load) { + if (cpu != hard_smp_processor_id()) { + prom_printf("SUN4V: init mondo on cpu %d not %d\n", + cpu, hard_smp_processor_id()); + prom_halt(); + } + sun4v_register_mondo_queues(cpu); + } } /* Only invoked on boot processor. */ @@ -884,6 +1044,9 @@ void __init init_IRQ(void) kill_prom_timer(); memset(&ivector_table[0], 0, sizeof(ivector_table)); + if (tlb_type == hypervisor) + sun4v_init_mondo_queues(1, hard_smp_processor_id(), 1, 1); + /* We need to clear any IRQ's pending in the soft interrupt * registers, a spurious one could be left around from the * PROM timer which we just disabled. diff --git a/arch/sparc64/kernel/itlb_base.S b/arch/sparc64/kernel/itlb_base.S deleted file mode 100644 index 4951ff8f687..00000000000 --- a/arch/sparc64/kernel/itlb_base.S +++ /dev/null @@ -1,79 +0,0 @@ -/* $Id: itlb_base.S,v 1.12 2002/02/09 19:49:30 davem Exp $ - * itlb_base.S: Front end to ITLB miss replacement strategy. - * This is included directly into the trap table. - * - * Copyright (C) 1996,1998 David S. Miller (davem@redhat.com) - * Copyright (C) 1997,1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -#if PAGE_SHIFT == 13 -/* - * To compute vpte offset, we need to do ((addr >> 13) << 3), - * which can be optimized to (addr >> 10) if bits 10/11/12 can - * be guaranteed to be 0 ... mmu_context.h does guarantee this - * by only using 10 bits in the hwcontext value. - */ -#define CREATE_VPTE_OFFSET1(r1, r2) \ - srax r1, 10, r2 -#define CREATE_VPTE_OFFSET2(r1, r2) nop -#else /* PAGE_SHIFT */ -#define CREATE_VPTE_OFFSET1(r1, r2) \ - srax r1, PAGE_SHIFT, r2 -#define CREATE_VPTE_OFFSET2(r1, r2) \ - sllx r2, 3, r2 -#endif /* PAGE_SHIFT */ - - -/* Ways we can get here: - * - * 1) Nucleus instruction misses from module code. - * 2) All user instruction misses. - * - * All real page faults merge their code paths to the - * sparc64_realfault_common label below. - */ - -/* ITLB ** ICACHE line 1: Quick user TLB misses */ - mov TLB_SFSR, %g1 - ldxa [%g1 + %g1] ASI_IMMU, %g4 ! Get TAG_ACCESS - CREATE_VPTE_OFFSET1(%g4, %g6) ! Create VPTE offset - CREATE_VPTE_OFFSET2(%g4, %g6) ! Create VPTE offset - ldxa [%g3 + %g6] ASI_P, %g5 ! Load VPTE -1: brgez,pn %g5, 3f ! Not valid, branch out - sethi %hi(_PAGE_EXEC), %g4 ! Delay-slot - andcc %g5, %g4, %g0 ! Executable? - -/* ITLB ** ICACHE line 2: Real faults */ - be,pn %xcc, 3f ! Nope, branch. - nop ! Delay-slot -2: stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load PTE into TLB - retry ! Trap return -3: rdpr %pstate, %g4 ! Move into alt-globals - wrpr %g4, PSTATE_AG|PSTATE_MG, %pstate - rdpr %tpc, %g5 ! And load faulting VA - mov FAULT_CODE_ITLB, %g4 ! It was read from ITLB - -/* ITLB ** ICACHE line 3: Finish faults */ -sparc64_realfault_common: ! Called by dtlb_miss - stb %g4, [%g6 + TI_FAULT_CODE] - stx %g5, [%g6 + TI_FAULT_ADDR] - ba,pt %xcc, etrap ! Save state -1: rd %pc, %g7 ! ... - call do_sparc64_fault ! Call fault handler - add %sp, PTREGS_OFF, %o0! Compute pt_regs arg - ba,pt %xcc, rtrap_clr_l6 ! Restore cpu state - nop - -/* ITLB ** ICACHE line 4: Window fixups */ -winfix_trampoline: - rdpr %tpc, %g3 ! Prepare winfixup TNPC - or %g3, 0x7c, %g3 ! Compute branch offset - wrpr %g3, %tnpc ! Write it into TNPC - done ! Do it to it - nop - nop - nop - nop - -#undef CREATE_VPTE_OFFSET1 -#undef CREATE_VPTE_OFFSET2 diff --git a/arch/sparc64/kernel/itlb_miss.S b/arch/sparc64/kernel/itlb_miss.S new file mode 100644 index 00000000000..ad46e2024f4 --- /dev/null +++ b/arch/sparc64/kernel/itlb_miss.S @@ -0,0 +1,39 @@ +/* ITLB ** ICACHE line 1: Context 0 check and TSB load */ + ldxa [%g0] ASI_IMMU_TSB_8KB_PTR, %g1 ! Get TSB 8K pointer + ldxa [%g0] ASI_IMMU, %g6 ! Get TAG TARGET + srlx %g6, 48, %g5 ! Get context + sllx %g6, 22, %g6 ! Zero out context + brz,pn %g5, kvmap_itlb ! Context 0 processing + srlx %g6, 22, %g6 ! Delay slot + TSB_LOAD_QUAD(%g1, %g4) ! Load TSB entry + cmp %g4, %g6 ! Compare TAG + +/* ITLB ** ICACHE line 2: TSB compare and TLB load */ + bne,pn %xcc, tsb_miss_itlb ! Miss + mov FAULT_CODE_ITLB, %g3 + andcc %g5, _PAGE_EXEC_4U, %g0 ! Executable? + be,pn %xcc, tsb_do_fault + nop ! Delay slot, fill me + stxa %g5, [%g0] ASI_ITLB_DATA_IN ! Load TLB + retry ! Trap done + nop + +/* ITLB ** ICACHE line 3: */ + nop + nop + nop + nop + nop + nop + nop + nop + +/* ITLB ** ICACHE line 4: */ + nop + nop + nop + nop + nop + nop + nop + nop diff --git a/arch/sparc64/kernel/kprobes.c b/arch/sparc64/kernel/kprobes.c index b9a9ce70e55..ffc7309e9f2 100644 --- a/arch/sparc64/kernel/kprobes.c +++ b/arch/sparc64/kernel/kprobes.c @@ -6,9 +6,11 @@ #include <linux/config.h> #include <linux/kernel.h> #include <linux/kprobes.h> +#include <linux/module.h> #include <asm/kdebug.h> #include <asm/signal.h> #include <asm/cacheflush.h> +#include <asm/uaccess.h> /* We do not have hardware single-stepping on sparc64. * So we implement software single-stepping with breakpoint @@ -302,16 +304,68 @@ static inline int kprobe_fault_handler(struct pt_regs *regs, int trapnr) { struct kprobe *cur = kprobe_running(); struct kprobe_ctlblk *kcb = get_kprobe_ctlblk(); + const struct exception_table_entry *entry; + + switch(kcb->kprobe_status) { + case KPROBE_HIT_SS: + case KPROBE_REENTER: + /* + * We are here because the instruction being single + * stepped caused a page fault. We reset the current + * kprobe and the tpc points back to the probe address + * and allow the page fault handler to continue as a + * normal page fault. + */ + regs->tpc = (unsigned long)cur->addr; + regs->tnpc = kcb->kprobe_orig_tnpc; + regs->tstate = ((regs->tstate & ~TSTATE_PIL) | + kcb->kprobe_orig_tstate_pil); + if (kcb->kprobe_status == KPROBE_REENTER) + restore_previous_kprobe(kcb); + else + reset_current_kprobe(); + preempt_enable_no_resched(); + break; + case KPROBE_HIT_ACTIVE: + case KPROBE_HIT_SSDONE: + /* + * We increment the nmissed count for accounting, + * we can also use npre/npostfault count for accouting + * these specific fault cases. + */ + kprobes_inc_nmissed_count(cur); + + /* + * We come here because instructions in the pre/post + * handler caused the page_fault, this could happen + * if handler tries to access user space by + * copy_from_user(), get_user() etc. Let the + * user-specified handler try to fix it first. + */ + if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr)) + return 1; - if (cur->fault_handler && cur->fault_handler(cur, regs, trapnr)) - return 1; + /* + * In case the user-specified fault handler returned + * zero, try to fix up. + */ - if (kcb->kprobe_status & KPROBE_HIT_SS) { - resume_execution(cur, regs, kcb); + entry = search_exception_tables(regs->tpc); + if (entry) { + regs->tpc = entry->fixup; + regs->tnpc = regs->tpc + 4; + return 1; + } - reset_current_kprobe(); - preempt_enable_no_resched(); + /* + * fixup_exception() could not handle it, + * Let do_page_fault() fix it. + */ + break; + default: + break; } + return 0; } @@ -324,6 +378,9 @@ int __kprobes kprobe_exceptions_notify(struct notifier_block *self, struct die_args *args = (struct die_args *)data; int ret = NOTIFY_DONE; + if (args->regs && user_mode(args->regs)) + return ret; + switch (val) { case DIE_DEBUG: if (kprobe_handler(args->regs)) diff --git a/arch/sparc64/kernel/ktlb.S b/arch/sparc64/kernel/ktlb.S index d9244d3c9f7..31da1e564c9 100644 --- a/arch/sparc64/kernel/ktlb.S +++ b/arch/sparc64/kernel/ktlb.S @@ -4,191 +4,276 @@ * Copyright (C) 1996 Eddie C. Dost (ecd@brainaid.de) * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) * Copyright (C) 1996,98,99 Jakub Jelinek (jj@sunsite.mff.cuni.cz) -*/ + */ #include <linux/config.h> #include <asm/head.h> #include <asm/asi.h> #include <asm/page.h> #include <asm/pgtable.h> +#include <asm/tsb.h> .text .align 32 -/* - * On a second level vpte miss, check whether the original fault is to the OBP - * range (note that this is only possible for instruction miss, data misses to - * obp range do not use vpte). If so, go back directly to the faulting address. - * This is because we want to read the tpc, otherwise we have no way of knowing - * the 8k aligned faulting address if we are using >8k kernel pagesize. This - * also ensures no vpte range addresses are dropped into tlb while obp is - * executing (see inherit_locked_prom_mappings() rant). - */ -sparc64_vpte_nucleus: - /* Note that kvmap below has verified that the address is - * in the range MODULES_VADDR --> VMALLOC_END already. So - * here we need only check if it is an OBP address or not. +kvmap_itlb: + /* g6: TAG TARGET */ + mov TLB_TAG_ACCESS, %g4 + ldxa [%g4] ASI_IMMU, %g4 + + /* sun4v_itlb_miss branches here with the missing virtual + * address already loaded into %g4 */ +kvmap_itlb_4v: + +kvmap_itlb_nonlinear: + /* Catch kernel NULL pointer calls. */ + sethi %hi(PAGE_SIZE), %g5 + cmp %g4, %g5 + bleu,pn %xcc, kvmap_dtlb_longpath + nop + + KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_itlb_load) + +kvmap_itlb_tsb_miss: sethi %hi(LOW_OBP_ADDRESS), %g5 cmp %g4, %g5 - blu,pn %xcc, kern_vpte + blu,pn %xcc, kvmap_itlb_vmalloc_addr mov 0x1, %g5 sllx %g5, 32, %g5 cmp %g4, %g5 - blu,pn %xcc, vpte_insn_obp + blu,pn %xcc, kvmap_itlb_obp nop - /* These two instructions are patched by paginig_init(). */ -kern_vpte: - sethi %hi(swapper_pgd_zero), %g5 - lduw [%g5 + %lo(swapper_pgd_zero)], %g5 +kvmap_itlb_vmalloc_addr: + KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_itlb_longpath) - /* With kernel PGD in %g5, branch back into dtlb_backend. */ - ba,pt %xcc, sparc64_kpte_continue - andn %g1, 0x3, %g1 /* Finish PMD offset adjustment. */ + KTSB_LOCK_TAG(%g1, %g2, %g7) -vpte_noent: - /* Restore previous TAG_ACCESS, %g5 is zero, and we will - * skip over the trap instruction so that the top level - * TLB miss handler will thing this %g5 value is just an - * invalid PTE, thus branching to full fault processing. - */ - mov TLB_SFSR, %g1 - stxa %g4, [%g1 + %g1] ASI_DMMU - done - -vpte_insn_obp: - /* Behave as if we are at TL0. */ - wrpr %g0, 1, %tl - rdpr %tpc, %g4 /* Find original faulting iaddr */ - srlx %g4, 13, %g4 /* Throw out context bits */ - sllx %g4, 13, %g4 /* g4 has vpn + ctx0 now */ - - /* Restore previous TAG_ACCESS. */ - mov TLB_SFSR, %g1 - stxa %g4, [%g1 + %g1] ASI_IMMU - - sethi %hi(prom_trans), %g5 - or %g5, %lo(prom_trans), %g5 - -1: ldx [%g5 + 0x00], %g6 ! base - brz,a,pn %g6, longpath ! no more entries, fail - mov TLB_SFSR, %g1 ! and restore %g1 - ldx [%g5 + 0x08], %g1 ! len - add %g6, %g1, %g1 ! end - cmp %g6, %g4 - bgu,pt %xcc, 2f - cmp %g4, %g1 - bgeu,pt %xcc, 2f - ldx [%g5 + 0x10], %g1 ! PTE - - /* TLB load, restore %g1, and return from trap. */ - sub %g4, %g6, %g6 - add %g1, %g6, %g5 - mov TLB_SFSR, %g1 - stxa %g5, [%g0] ASI_ITLB_DATA_IN - retry + /* Load and check PTE. */ + ldxa [%g5] ASI_PHYS_USE_EC, %g5 + mov 1, %g7 + sllx %g7, TSB_TAG_INVALID_BIT, %g7 + brgez,a,pn %g5, kvmap_itlb_longpath + KTSB_STORE(%g1, %g7) + + KTSB_WRITE(%g1, %g5, %g6) + + /* fallthrough to TLB load */ -2: ba,pt %xcc, 1b - add %g5, (3 * 8), %g5 ! next entry - -kvmap_do_obp: - sethi %hi(prom_trans), %g5 - or %g5, %lo(prom_trans), %g5 - srlx %g4, 13, %g4 - sllx %g4, 13, %g4 - -1: ldx [%g5 + 0x00], %g6 ! base - brz,a,pn %g6, longpath ! no more entries, fail - mov TLB_SFSR, %g1 ! and restore %g1 - ldx [%g5 + 0x08], %g1 ! len - add %g6, %g1, %g1 ! end - cmp %g6, %g4 - bgu,pt %xcc, 2f - cmp %g4, %g1 - bgeu,pt %xcc, 2f - ldx [%g5 + 0x10], %g1 ! PTE - - /* TLB load, restore %g1, and return from trap. */ - sub %g4, %g6, %g6 - add %g1, %g6, %g5 - mov TLB_SFSR, %g1 - stxa %g5, [%g0] ASI_DTLB_DATA_IN +kvmap_itlb_load: + +661: stxa %g5, [%g0] ASI_ITLB_DATA_IN retry + .section .sun4v_2insn_patch, "ax" + .word 661b + nop + nop + .previous + + /* For sun4v the ASI_ITLB_DATA_IN store and the retry + * instruction get nop'd out and we get here to branch + * to the sun4v tlb load code. The registers are setup + * as follows: + * + * %g4: vaddr + * %g5: PTE + * %g6: TAG + * + * The sun4v TLB load wants the PTE in %g3 so we fix that + * up here. + */ + ba,pt %xcc, sun4v_itlb_load + mov %g5, %g3 -2: ba,pt %xcc, 1b - add %g5, (3 * 8), %g5 ! next entry +kvmap_itlb_longpath: + +661: rdpr %pstate, %g5 + wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate + .section .sun4v_2insn_patch, "ax" + .word 661b + SET_GL(1) + nop + .previous + + rdpr %tpc, %g5 + ba,pt %xcc, sparc64_realfault_common + mov FAULT_CODE_ITLB, %g4 + +kvmap_itlb_obp: + OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_itlb_longpath) + + KTSB_LOCK_TAG(%g1, %g2, %g7) + + KTSB_WRITE(%g1, %g5, %g6) + + ba,pt %xcc, kvmap_itlb_load + nop + +kvmap_dtlb_obp: + OBP_TRANS_LOOKUP(%g4, %g5, %g2, %g3, kvmap_dtlb_longpath) + + KTSB_LOCK_TAG(%g1, %g2, %g7) + + KTSB_WRITE(%g1, %g5, %g6) + + ba,pt %xcc, kvmap_dtlb_load + nop -/* - * On a first level data miss, check whether this is to the OBP range (note - * that such accesses can be made by prom, as well as by kernel using - * prom_getproperty on "address"), and if so, do not use vpte access ... - * rather, use information saved during inherit_prom_mappings() using 8k - * pagesize. - */ .align 32 -kvmap: - brgez,pn %g4, kvmap_nonlinear +kvmap_dtlb_tsb4m_load: + KTSB_LOCK_TAG(%g1, %g2, %g7) + KTSB_WRITE(%g1, %g5, %g6) + ba,pt %xcc, kvmap_dtlb_load nop -#ifdef CONFIG_DEBUG_PAGEALLOC +kvmap_dtlb: + /* %g6: TAG TARGET */ + mov TLB_TAG_ACCESS, %g4 + ldxa [%g4] ASI_DMMU, %g4 + + /* sun4v_dtlb_miss branches here with the missing virtual + * address already loaded into %g4 + */ +kvmap_dtlb_4v: + brgez,pn %g4, kvmap_dtlb_nonlinear + nop + + /* Correct TAG_TARGET is already in %g6, check 4mb TSB. */ + KERN_TSB4M_LOOKUP_TL1(%g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load) + + /* TSB entry address left in %g1, lookup linear PTE. + * Must preserve %g1 and %g6 (TAG). + */ +kvmap_dtlb_tsb4m_miss: + sethi %hi(kpte_linear_bitmap), %g2 + or %g2, %lo(kpte_linear_bitmap), %g2 + + /* Clear the PAGE_OFFSET top virtual bits, then shift + * down to get a 256MB physical address index. + */ + sllx %g4, 21, %g5 + mov 1, %g7 + srlx %g5, 21 + 28, %g5 + + /* Don't try this at home kids... this depends upon srlx + * only taking the low 6 bits of the shift count in %g5. + */ + sllx %g7, %g5, %g7 + + /* Divide by 64 to get the offset into the bitmask. */ + srlx %g5, 6, %g5 + sllx %g5, 3, %g5 + + /* kern_linear_pte_xor[((mask & bit) ? 1 : 0)] */ + ldx [%g2 + %g5], %g2 + andcc %g2, %g7, %g0 + sethi %hi(kern_linear_pte_xor), %g5 + or %g5, %lo(kern_linear_pte_xor), %g5 + bne,a,pt %xcc, 1f + add %g5, 8, %g5 + +1: ldx [%g5], %g2 + .globl kvmap_linear_patch kvmap_linear_patch: -#endif - ba,pt %xcc, kvmap_load + ba,pt %xcc, kvmap_dtlb_tsb4m_load xor %g2, %g4, %g5 -#ifdef CONFIG_DEBUG_PAGEALLOC - sethi %hi(swapper_pg_dir), %g5 - or %g5, %lo(swapper_pg_dir), %g5 - sllx %g4, 64 - (PGDIR_SHIFT + PGDIR_BITS), %g6 - srlx %g6, 64 - PAGE_SHIFT, %g6 - andn %g6, 0x3, %g6 - lduw [%g5 + %g6], %g5 - brz,pn %g5, longpath - sllx %g4, 64 - (PMD_SHIFT + PMD_BITS), %g6 - srlx %g6, 64 - PAGE_SHIFT, %g6 - sllx %g5, 11, %g5 - andn %g6, 0x3, %g6 - lduwa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 - brz,pn %g5, longpath - sllx %g4, 64 - PMD_SHIFT, %g6 - srlx %g6, 64 - PAGE_SHIFT, %g6 - sllx %g5, 11, %g5 - andn %g6, 0x7, %g6 - ldxa [%g5 + %g6] ASI_PHYS_USE_EC, %g5 - brz,pn %g5, longpath +kvmap_dtlb_vmalloc_addr: + KERN_PGTABLE_WALK(%g4, %g5, %g2, kvmap_dtlb_longpath) + + KTSB_LOCK_TAG(%g1, %g2, %g7) + + /* Load and check PTE. */ + ldxa [%g5] ASI_PHYS_USE_EC, %g5 + mov 1, %g7 + sllx %g7, TSB_TAG_INVALID_BIT, %g7 + brgez,a,pn %g5, kvmap_dtlb_longpath + KTSB_STORE(%g1, %g7) + + KTSB_WRITE(%g1, %g5, %g6) + + /* fallthrough to TLB load */ + +kvmap_dtlb_load: + +661: stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB + retry + .section .sun4v_2insn_patch, "ax" + .word 661b + nop + nop + .previous + + /* For sun4v the ASI_DTLB_DATA_IN store and the retry + * instruction get nop'd out and we get here to branch + * to the sun4v tlb load code. The registers are setup + * as follows: + * + * %g4: vaddr + * %g5: PTE + * %g6: TAG + * + * The sun4v TLB load wants the PTE in %g3 so we fix that + * up here. + */ + ba,pt %xcc, sun4v_dtlb_load + mov %g5, %g3 + +kvmap_dtlb_nonlinear: + /* Catch kernel NULL pointer derefs. */ + sethi %hi(PAGE_SIZE), %g5 + cmp %g4, %g5 + bleu,pn %xcc, kvmap_dtlb_longpath nop - ba,a,pt %xcc, kvmap_load -#endif -kvmap_nonlinear: + KERN_TSB_LOOKUP_TL1(%g4, %g6, %g5, %g1, %g2, %g3, kvmap_dtlb_load) + +kvmap_dtlb_tsbmiss: sethi %hi(MODULES_VADDR), %g5 cmp %g4, %g5 - blu,pn %xcc, longpath + blu,pn %xcc, kvmap_dtlb_longpath mov (VMALLOC_END >> 24), %g5 sllx %g5, 24, %g5 cmp %g4, %g5 - bgeu,pn %xcc, longpath + bgeu,pn %xcc, kvmap_dtlb_longpath nop kvmap_check_obp: sethi %hi(LOW_OBP_ADDRESS), %g5 cmp %g4, %g5 - blu,pn %xcc, kvmap_vmalloc_addr + blu,pn %xcc, kvmap_dtlb_vmalloc_addr mov 0x1, %g5 sllx %g5, 32, %g5 cmp %g4, %g5 - blu,pn %xcc, kvmap_do_obp + blu,pn %xcc, kvmap_dtlb_obp nop - -kvmap_vmalloc_addr: - /* If we get here, a vmalloc addr was accessed, load kernel VPTE. */ - ldxa [%g3 + %g6] ASI_N, %g5 - brgez,pn %g5, longpath + ba,pt %xcc, kvmap_dtlb_vmalloc_addr nop -kvmap_load: - /* PTE is valid, load into TLB and return from trap. */ - stxa %g5, [%g0] ASI_DTLB_DATA_IN ! Reload TLB - retry +kvmap_dtlb_longpath: + +661: rdpr %pstate, %g5 + wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate + .section .sun4v_2insn_patch, "ax" + .word 661b + SET_GL(1) + ldxa [%g0] ASI_SCRATCHPAD, %g5 + .previous + + rdpr %tl, %g3 + cmp %g3, 1 + +661: mov TLB_TAG_ACCESS, %g4 + ldxa [%g4] ASI_DMMU, %g5 + .section .sun4v_2insn_patch, "ax" + .word 661b + ldx [%g5 + HV_FAULT_D_ADDR_OFFSET], %g5 + nop + .previous + + be,pt %xcc, sparc64_realfault_common + mov FAULT_CODE_DTLB, %g4 + ba,pt %xcc, winfix_trampoline + nop diff --git a/arch/sparc64/kernel/pci.c b/arch/sparc64/kernel/pci.c index 2ff7c32ab0c..dfccff29e18 100644 --- a/arch/sparc64/kernel/pci.c +++ b/arch/sparc64/kernel/pci.c @@ -188,6 +188,7 @@ extern void psycho_init(int, char *); extern void schizo_init(int, char *); extern void schizo_plus_init(int, char *); extern void tomatillo_init(int, char *); +extern void sun4v_pci_init(int, char *); static struct { char *model_name; @@ -204,6 +205,7 @@ static struct { { "pci108e,8002", schizo_plus_init }, { "SUNW,tomatillo", tomatillo_init }, { "pci108e,a801", tomatillo_init }, + { "SUNW,sun4v-pci", sun4v_pci_init }, }; #define PCI_NUM_CONTROLLER_TYPES (sizeof(pci_controller_table) / \ sizeof(pci_controller_table[0])) @@ -283,6 +285,12 @@ int __init pcic_present(void) return pci_controller_scan(pci_is_controller); } +struct pci_iommu_ops *pci_iommu_ops; +EXPORT_SYMBOL(pci_iommu_ops); + +extern struct pci_iommu_ops pci_sun4u_iommu_ops, + pci_sun4v_iommu_ops; + /* Find each controller in the system, attach and initialize * software state structure for each and link into the * pci_controller_root. Setup the controller enough such @@ -290,6 +298,11 @@ int __init pcic_present(void) */ static void __init pci_controller_probe(void) { + if (tlb_type == hypervisor) + pci_iommu_ops = &pci_sun4v_iommu_ops; + else + pci_iommu_ops = &pci_sun4u_iommu_ops; + printk("PCI: Probing for controllers.\n"); pci_controller_scan(pci_controller_init); @@ -643,6 +656,7 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, __pci_mmap_set_flags(dev, vma, mmap_state); __pci_mmap_set_pgprot(dev, vma, mmap_state); + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); ret = io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, vma->vm_end - vma->vm_start, @@ -650,7 +664,6 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, if (ret) return ret; - vma->vm_flags |= VM_IO; return 0; } diff --git a/arch/sparc64/kernel/pci_common.c b/arch/sparc64/kernel/pci_common.c index 58310aacea2..33dedb1aacd 100644 --- a/arch/sparc64/kernel/pci_common.c +++ b/arch/sparc64/kernel/pci_common.c @@ -39,6 +39,8 @@ static int __init find_device_prom_node(struct pci_pbm_info *pbm, { int node; + *nregs = 0; + /* * Return the PBM's PROM node in case we are it's PCI device, * as the PBM's reg property is different to standard PCI reg @@ -51,10 +53,8 @@ static int __init find_device_prom_node(struct pci_pbm_info *pbm, pdev->device == PCI_DEVICE_ID_SUN_SCHIZO || pdev->device == PCI_DEVICE_ID_SUN_TOMATILLO || pdev->device == PCI_DEVICE_ID_SUN_SABRE || - pdev->device == PCI_DEVICE_ID_SUN_HUMMINGBIRD)) { - *nregs = 0; + pdev->device == PCI_DEVICE_ID_SUN_HUMMINGBIRD)) return bus_prom_node; - } node = prom_getchild(bus_prom_node); while (node != 0) { @@ -541,135 +541,183 @@ void __init pci_assign_unassigned(struct pci_pbm_info *pbm, pci_assign_unassigned(pbm, bus); } -static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt) +static inline unsigned int pci_slot_swivel(struct pci_pbm_info *pbm, + struct pci_dev *toplevel_pdev, + struct pci_dev *pdev, + unsigned int interrupt) { - struct linux_prom_pci_intmap bridge_local_intmap[PROM_PCIIMAP_MAX], *intmap; - struct linux_prom_pci_intmask bridge_local_intmask, *intmask; - struct pcidev_cookie *dev_pcp = pdev->sysdata; - struct pci_pbm_info *pbm = dev_pcp->pbm; - struct linux_prom_pci_registers *pregs = dev_pcp->prom_regs; - unsigned int hi, mid, lo, irq; - int i, num_intmap, map_slot; + unsigned int ret; - intmap = &pbm->pbm_intmap[0]; - intmask = &pbm->pbm_intmask; - num_intmap = pbm->num_pbm_intmap; - map_slot = 0; + if (unlikely(interrupt < 1 || interrupt > 4)) { + printk("%s: Device %s interrupt value of %u is strange.\n", + pbm->name, pci_name(pdev), interrupt); + return interrupt; + } - /* If we are underneath a PCI bridge, use PROM register - * property of the parent bridge which is closest to - * the PBM. - * - * However if that parent bridge has interrupt map/mask - * properties of its own we use the PROM register property - * of the next child device on the path to PDEV. - * - * In detail the two cases are (note that the 'X' below is the - * 'next child on the path to PDEV' mentioned above): - * - * 1) PBM --> PCI bus lacking int{map,mask} --> X ... PDEV - * - * Here we use regs of 'PCI bus' device. - * - * 2) PBM --> PCI bus with int{map,mask} --> X ... PDEV - * - * Here we use regs of 'X'. Note that X can be PDEV. - */ - if (pdev->bus->number != pbm->pci_first_busno) { - struct pcidev_cookie *bus_pcp, *regs_pcp; - struct pci_dev *bus_dev, *regs_dev; - int plen; + ret = ((interrupt - 1 + (PCI_SLOT(pdev->devfn) & 3)) & 3) + 1; + + printk("%s: %s IRQ Swivel %s [%x:%x] -> [%x]\n", + pbm->name, pci_name(toplevel_pdev), pci_name(pdev), + interrupt, PCI_SLOT(pdev->devfn), ret); + + return ret; +} + +static inline unsigned int pci_apply_intmap(struct pci_pbm_info *pbm, + struct pci_dev *toplevel_pdev, + struct pci_dev *pbus, + struct pci_dev *pdev, + unsigned int interrupt, + unsigned int *cnode) +{ + struct linux_prom_pci_intmap imap[PROM_PCIIMAP_MAX]; + struct linux_prom_pci_intmask imask; + struct pcidev_cookie *pbus_pcp = pbus->sysdata; + struct pcidev_cookie *pdev_pcp = pdev->sysdata; + struct linux_prom_pci_registers *pregs = pdev_pcp->prom_regs; + int plen, num_imap, i; + unsigned int hi, mid, lo, irq, orig_interrupt; + + *cnode = pbus_pcp->prom_node; + + plen = prom_getproperty(pbus_pcp->prom_node, "interrupt-map", + (char *) &imap[0], sizeof(imap)); + if (plen <= 0 || + (plen % sizeof(struct linux_prom_pci_intmap)) != 0) { + printk("%s: Device %s interrupt-map has bad len %d\n", + pbm->name, pci_name(pbus), plen); + goto no_intmap; + } + num_imap = plen / sizeof(struct linux_prom_pci_intmap); + + plen = prom_getproperty(pbus_pcp->prom_node, "interrupt-map-mask", + (char *) &imask, sizeof(imask)); + if (plen <= 0 || + (plen % sizeof(struct linux_prom_pci_intmask)) != 0) { + printk("%s: Device %s interrupt-map-mask has bad len %d\n", + pbm->name, pci_name(pbus), plen); + goto no_intmap; + } + + orig_interrupt = interrupt; - bus_dev = pdev->bus->self; - regs_dev = pdev; + hi = pregs->phys_hi & imask.phys_hi; + mid = pregs->phys_mid & imask.phys_mid; + lo = pregs->phys_lo & imask.phys_lo; + irq = interrupt & imask.interrupt; - while (bus_dev->bus && - bus_dev->bus->number != pbm->pci_first_busno) { - regs_dev = bus_dev; - bus_dev = bus_dev->bus->self; + for (i = 0; i < num_imap; i++) { + if (imap[i].phys_hi == hi && + imap[i].phys_mid == mid && + imap[i].phys_lo == lo && + imap[i].interrupt == irq) { + *cnode = imap[i].cnode; + interrupt = imap[i].cinterrupt; } + } - regs_pcp = regs_dev->sysdata; - pregs = regs_pcp->prom_regs; + printk("%s: %s MAP BUS %s DEV %s [%x] -> [%x]\n", + pbm->name, pci_name(toplevel_pdev), + pci_name(pbus), pci_name(pdev), + orig_interrupt, interrupt); - bus_pcp = bus_dev->sysdata; +no_intmap: + return interrupt; +} - /* But if the PCI bridge has it's own interrupt map - * and mask properties, use that and the regs of the - * PCI entity at the next level down on the path to the - * device. - */ - plen = prom_getproperty(bus_pcp->prom_node, "interrupt-map", - (char *) &bridge_local_intmap[0], - sizeof(bridge_local_intmap)); - if (plen != -1) { - intmap = &bridge_local_intmap[0]; - num_intmap = plen / sizeof(struct linux_prom_pci_intmap); - plen = prom_getproperty(bus_pcp->prom_node, - "interrupt-map-mask", - (char *) &bridge_local_intmask, - sizeof(bridge_local_intmask)); - if (plen == -1) { - printk("pci_intmap_match: Warning! Bridge has intmap " - "but no intmask.\n"); - printk("pci_intmap_match: Trying to recover.\n"); - return 0; - } +/* For each PCI bus on the way to the root: + * 1) If it has an interrupt-map property, apply it. + * 2) Else, swivel the interrupt number based upon the PCI device number. + * + * Return the "IRQ controller" node. If this is the PBM's device node, + * all interrupt translations are complete, else we should use that node's + * "reg" property to apply the PBM's "interrupt-{map,mask}" to the interrupt. + */ +static unsigned int __init pci_intmap_match_to_root(struct pci_pbm_info *pbm, + struct pci_dev *pdev, + unsigned int *interrupt) +{ + struct pci_dev *toplevel_pdev = pdev; + struct pcidev_cookie *toplevel_pcp = toplevel_pdev->sysdata; + unsigned int cnode = toplevel_pcp->prom_node; + + while (pdev->bus->number != pbm->pci_first_busno) { + struct pci_dev *pbus = pdev->bus->self; + struct pcidev_cookie *pcp = pbus->sysdata; + int plen; - if (pdev->bus->self != bus_dev) - map_slot = 1; + plen = prom_getproplen(pcp->prom_node, "interrupt-map"); + if (plen <= 0) { + *interrupt = pci_slot_swivel(pbm, toplevel_pdev, + pdev, *interrupt); + cnode = pcp->prom_node; } else { - pregs = bus_pcp->prom_regs; - map_slot = 1; + *interrupt = pci_apply_intmap(pbm, toplevel_pdev, + pbus, pdev, + *interrupt, &cnode); + + while (pcp->prom_node != cnode && + pbus->bus->number != pbm->pci_first_busno) { + pbus = pbus->bus->self; + pcp = pbus->sysdata; + } } - } + pdev = pbus; - if (map_slot) { - *interrupt = ((*interrupt - - 1 - + PCI_SLOT(pdev->devfn)) & 0x3) + 1; + if (cnode == pbm->prom_node) + break; } - hi = pregs->phys_hi & intmask->phys_hi; - mid = pregs->phys_mid & intmask->phys_mid; - lo = pregs->phys_lo & intmask->phys_lo; - irq = *interrupt & intmask->interrupt; - - for (i = 0; i < num_intmap; i++) { - if (intmap[i].phys_hi == hi && - intmap[i].phys_mid == mid && - intmap[i].phys_lo == lo && - intmap[i].interrupt == irq) { - *interrupt = intmap[i].cinterrupt; - printk("PCI-IRQ: Routing bus[%2x] slot[%2x] map[%d] to INO[%02x]\n", - pdev->bus->number, PCI_SLOT(pdev->devfn), - map_slot, *interrupt); - return 1; - } + return cnode; +} + +static int __init pci_intmap_match(struct pci_dev *pdev, unsigned int *interrupt) +{ + struct pcidev_cookie *dev_pcp = pdev->sysdata; + struct pci_pbm_info *pbm = dev_pcp->pbm; + struct linux_prom_pci_registers reg[PROMREG_MAX]; + unsigned int hi, mid, lo, irq; + int i, cnode, plen; + + cnode = pci_intmap_match_to_root(pbm, pdev, interrupt); + if (cnode == pbm->prom_node) + goto success; + + plen = prom_getproperty(cnode, "reg", (char *) reg, sizeof(reg)); + if (plen <= 0 || + (plen % sizeof(struct linux_prom_pci_registers)) != 0) { + printk("%s: OBP node %x reg property has bad len %d\n", + pbm->name, cnode, plen); + goto fail; } - /* We will run this code even if pbm->num_pbm_intmap is zero, just so - * we can apply the slot mapping to the PROM interrupt property value. - * So do not spit out these warnings in that case. - */ - if (num_intmap != 0) { - /* Print it both to OBP console and kernel one so that if bootup - * hangs here the user has the information to report. - */ - prom_printf("pci_intmap_match: bus %02x, devfn %02x: ", - pdev->bus->number, pdev->devfn); - prom_printf("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n", - pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt); - prom_printf("Please email this information to davem@redhat.com\n"); - - printk("pci_intmap_match: bus %02x, devfn %02x: ", - pdev->bus->number, pdev->devfn); - printk("IRQ [%08x.%08x.%08x.%08x] not found in interrupt-map\n", - pregs->phys_hi, pregs->phys_mid, pregs->phys_lo, *interrupt); - printk("Please email this information to davem@redhat.com\n"); + hi = reg[0].phys_hi & pbm->pbm_intmask.phys_hi; + mid = reg[0].phys_mid & pbm->pbm_intmask.phys_mid; + lo = reg[0].phys_lo & pbm->pbm_intmask.phys_lo; + irq = *interrupt & pbm->pbm_intmask.interrupt; + + for (i = 0; i < pbm->num_pbm_intmap; i++) { + struct linux_prom_pci_intmap *intmap; + + intmap = &pbm->pbm_intmap[i]; + + if (intmap->phys_hi == hi && + intmap->phys_mid == mid && + intmap->phys_lo == lo && + intmap->interrupt == irq) { + *interrupt = intmap->cinterrupt; + goto success; + } } +fail: return 0; + +success: + printk("PCI-IRQ: Routing bus[%2x] slot[%2x] to INO[%02x]\n", + pdev->bus->number, PCI_SLOT(pdev->devfn), + *interrupt); + return 1; } static void __init pdev_fixup_irq(struct pci_dev *pdev) @@ -703,16 +751,18 @@ static void __init pdev_fixup_irq(struct pci_dev *pdev) return; } - /* Fully specified already? */ - if (((prom_irq & PCI_IRQ_IGN) >> 6) == portid) { - pdev->irq = p->irq_build(pbm, pdev, prom_irq); - goto have_irq; - } + if (tlb_type != hypervisor) { + /* Fully specified already? */ + if (((prom_irq & PCI_IRQ_IGN) >> 6) == portid) { + pdev->irq = p->irq_build(pbm, pdev, prom_irq); + goto have_irq; + } - /* An onboard device? (bit 5 set) */ - if ((prom_irq & PCI_IRQ_INO) & 0x20) { - pdev->irq = p->irq_build(pbm, pdev, (portid << 6 | prom_irq)); - goto have_irq; + /* An onboard device? (bit 5 set) */ + if ((prom_irq & PCI_IRQ_INO) & 0x20) { + pdev->irq = p->irq_build(pbm, pdev, (portid << 6 | prom_irq)); + goto have_irq; + } } /* Can we find a matching entry in the interrupt-map? */ @@ -927,33 +977,30 @@ void pci_register_legacy_regions(struct resource *io_res, struct resource *p; /* VGA Video RAM. */ - p = kmalloc(sizeof(*p), GFP_KERNEL); + p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) return; - memset(p, 0, sizeof(*p)); p->name = "Video RAM area"; p->start = mem_res->start + 0xa0000UL; p->end = p->start + 0x1ffffUL; p->flags = IORESOURCE_BUSY; request_resource(mem_res, p); - p = kmalloc(sizeof(*p), GFP_KERNEL); + p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) return; - memset(p, 0, sizeof(*p)); p->name = "System ROM"; p->start = mem_res->start + 0xf0000UL; p->end = p->start + 0xffffUL; p->flags = IORESOURCE_BUSY; request_resource(mem_res, p); - p = kmalloc(sizeof(*p), GFP_KERNEL); + p = kzalloc(sizeof(*p), GFP_KERNEL); if (!p) return; - memset(p, 0, sizeof(*p)); p->name = "Video ROM"; p->start = mem_res->start + 0xc0000UL; p->end = p->start + 0x7fffUL; diff --git a/arch/sparc64/kernel/pci_iommu.c b/arch/sparc64/kernel/pci_iommu.c index a11910be101..8efbc139769 100644 --- a/arch/sparc64/kernel/pci_iommu.c +++ b/arch/sparc64/kernel/pci_iommu.c @@ -139,12 +139,11 @@ void pci_iommu_table_init(struct pci_iommu *iommu, int tsbsize, u32 dma_offset, /* Allocate and initialize the free area map. */ sz = num_tsb_entries / 8; sz = (sz + 7UL) & ~7UL; - iommu->arena.map = kmalloc(sz, GFP_KERNEL); + iommu->arena.map = kzalloc(sz, GFP_KERNEL); if (!iommu->arena.map) { prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n"); prom_halt(); } - memset(iommu->arena.map, 0, sz); iommu->arena.limit = num_tsb_entries; /* Allocate and initialize the dummy page which we @@ -219,7 +218,7 @@ static inline void iommu_free_ctx(struct pci_iommu *iommu, int ctx) * DMA for PCI device PDEV. Return non-NULL cpu-side address if * successful and set *DMA_ADDRP to the PCI side dma address. */ -void *pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) +static void *pci_4u_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -267,7 +266,7 @@ void *pci_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_ad } /* Free and unmap a consistent DMA translation. */ -void pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_t dvma) +static void pci_4u_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_t dvma) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -294,7 +293,7 @@ void pci_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_ /* Map a single buffer at PTR of SZ bytes for PCI DMA * in streaming mode. */ -dma_addr_t pci_map_single(struct pci_dev *pdev, void *ptr, size_t sz, int direction) +static dma_addr_t pci_4u_map_single(struct pci_dev *pdev, void *ptr, size_t sz, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -415,7 +414,7 @@ do_flush_sync: } /* Unmap a single streaming mode DMA translation. */ -void pci_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) +static void pci_4u_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -548,7 +547,7 @@ static inline void fill_sg(iopte_t *iopte, struct scatterlist *sg, * When making changes here, inspect the assembly output. I was having * hard time to kepp this routine out of using stack slots for holding variables. */ -int pci_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +static int pci_4u_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -562,9 +561,9 @@ int pci_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int /* Fast path single entry scatterlists. */ if (nelems == 1) { sglist->dma_address = - pci_map_single(pdev, - (page_address(sglist->page) + sglist->offset), - sglist->length, direction); + pci_4u_map_single(pdev, + (page_address(sglist->page) + sglist->offset), + sglist->length, direction); if (unlikely(sglist->dma_address == PCI_DMA_ERROR_CODE)) return 0; sglist->dma_length = sglist->length; @@ -635,7 +634,7 @@ bad_no_ctx: } /* Unmap a set of streaming mode DMA translations. */ -void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +static void pci_4u_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -695,7 +694,7 @@ void pci_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, /* Make physical memory consistent for a single * streaming mode DMA translation after a transfer. */ -void pci_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) +static void pci_4u_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -735,7 +734,7 @@ void pci_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size /* Make physical memory consistent for a set of streaming * mode DMA translations after a transfer. */ -void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +static void pci_4u_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) { struct pcidev_cookie *pcp; struct pci_iommu *iommu; @@ -776,6 +775,17 @@ void pci_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, i spin_unlock_irqrestore(&iommu->lock, flags); } +struct pci_iommu_ops pci_sun4u_iommu_ops = { + .alloc_consistent = pci_4u_alloc_consistent, + .free_consistent = pci_4u_free_consistent, + .map_single = pci_4u_map_single, + .unmap_single = pci_4u_unmap_single, + .map_sg = pci_4u_map_sg, + .unmap_sg = pci_4u_unmap_sg, + .dma_sync_single_for_cpu = pci_4u_dma_sync_single_for_cpu, + .dma_sync_sg_for_cpu = pci_4u_dma_sync_sg_for_cpu, +}; + static void ali_sound_dma_hack(struct pci_dev *pdev, int set_bit) { struct pci_dev *ali_isa_bridge; diff --git a/arch/sparc64/kernel/pci_psycho.c b/arch/sparc64/kernel/pci_psycho.c index c03ed5f49d3..d17878b145c 100644 --- a/arch/sparc64/kernel/pci_psycho.c +++ b/arch/sparc64/kernel/pci_psycho.c @@ -286,17 +286,17 @@ static unsigned char psycho_pil_table[] = { /*0x14*/0, 0, 0, 0, /* PCI B slot 1 Int A, B, C, D */ /*0x18*/0, 0, 0, 0, /* PCI B slot 2 Int A, B, C, D */ /*0x1c*/0, 0, 0, 0, /* PCI B slot 3 Int A, B, C, D */ -/*0x20*/4, /* SCSI */ +/*0x20*/5, /* SCSI */ /*0x21*/5, /* Ethernet */ /*0x22*/8, /* Parallel Port */ /*0x23*/13, /* Audio Record */ /*0x24*/14, /* Audio Playback */ /*0x25*/15, /* PowerFail */ -/*0x26*/4, /* second SCSI */ +/*0x26*/5, /* second SCSI */ /*0x27*/11, /* Floppy */ -/*0x28*/4, /* Spare Hardware */ +/*0x28*/5, /* Spare Hardware */ /*0x29*/9, /* Keyboard */ -/*0x2a*/4, /* Mouse */ +/*0x2a*/5, /* Mouse */ /*0x2b*/12, /* Serial */ /*0x2c*/10, /* Timer 0 */ /*0x2d*/11, /* Timer 1 */ @@ -313,11 +313,11 @@ static int psycho_ino_to_pil(struct pci_dev *pdev, unsigned int ino) ret = psycho_pil_table[ino]; if (ret == 0 && pdev == NULL) { - ret = 4; + ret = 5; } else if (ret == 0) { switch ((pdev->class >> 16) & 0xff) { case PCI_BASE_CLASS_STORAGE: - ret = 4; + ret = 5; break; case PCI_BASE_CLASS_NETWORK: @@ -336,7 +336,7 @@ static int psycho_ino_to_pil(struct pci_dev *pdev, unsigned int ino) break; default: - ret = 4; + ret = 5; break; }; } @@ -1164,7 +1164,7 @@ static void pbm_config_busmastering(struct pci_pbm_info *pbm) static void pbm_scan_bus(struct pci_controller_info *p, struct pci_pbm_info *pbm) { - struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL); + struct pcidev_cookie *cookie = kzalloc(sizeof(*cookie), GFP_KERNEL); if (!cookie) { prom_printf("PSYCHO: Critical allocation failure.\n"); @@ -1172,7 +1172,6 @@ static void pbm_scan_bus(struct pci_controller_info *p, } /* All we care about is the PBM. */ - memset(cookie, 0, sizeof(*cookie)); cookie->pbm = pbm; pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, @@ -1465,18 +1464,16 @@ void psycho_init(int node, char *model_name) } } - p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); + p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); if (!p) { prom_printf("PSYCHO: Fatal memory allocation error.\n"); prom_halt(); } - memset(p, 0, sizeof(*p)); - iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC); + iommu = kzalloc(sizeof(struct pci_iommu), GFP_ATOMIC); if (!iommu) { prom_printf("PSYCHO: Fatal memory allocation error.\n"); prom_halt(); } - memset(iommu, 0, sizeof(*iommu)); p->pbm_A.iommu = p->pbm_B.iommu = iommu; p->next = pci_controller_root; diff --git a/arch/sparc64/kernel/pci_sabre.c b/arch/sparc64/kernel/pci_sabre.c index da8e1364194..f67bb7f078c 100644 --- a/arch/sparc64/kernel/pci_sabre.c +++ b/arch/sparc64/kernel/pci_sabre.c @@ -533,17 +533,17 @@ static unsigned char sabre_pil_table[] = { /*0x14*/0, 0, 0, 0, /* PCI B slot 1 Int A, B, C, D */ /*0x18*/0, 0, 0, 0, /* PCI B slot 2 Int A, B, C, D */ /*0x1c*/0, 0, 0, 0, /* PCI B slot 3 Int A, B, C, D */ -/*0x20*/4, /* SCSI */ +/*0x20*/5, /* SCSI */ /*0x21*/5, /* Ethernet */ /*0x22*/8, /* Parallel Port */ /*0x23*/13, /* Audio Record */ /*0x24*/14, /* Audio Playback */ /*0x25*/15, /* PowerFail */ -/*0x26*/4, /* second SCSI */ +/*0x26*/5, /* second SCSI */ /*0x27*/11, /* Floppy */ -/*0x28*/4, /* Spare Hardware */ +/*0x28*/5, /* Spare Hardware */ /*0x29*/9, /* Keyboard */ -/*0x2a*/4, /* Mouse */ +/*0x2a*/5, /* Mouse */ /*0x2b*/12, /* Serial */ /*0x2c*/10, /* Timer 0 */ /*0x2d*/11, /* Timer 1 */ @@ -565,11 +565,11 @@ static int sabre_ino_to_pil(struct pci_dev *pdev, unsigned int ino) ret = sabre_pil_table[ino]; if (ret == 0 && pdev == NULL) { - ret = 4; + ret = 5; } else if (ret == 0) { switch ((pdev->class >> 16) & 0xff) { case PCI_BASE_CLASS_STORAGE: - ret = 4; + ret = 5; break; case PCI_BASE_CLASS_NETWORK: @@ -588,7 +588,7 @@ static int sabre_ino_to_pil(struct pci_dev *pdev, unsigned int ino) break; default: - ret = 4; + ret = 5; break; }; } @@ -1167,7 +1167,7 @@ static void apb_init(struct pci_controller_info *p, struct pci_bus *sabre_bus) static struct pcidev_cookie *alloc_bridge_cookie(struct pci_pbm_info *pbm) { - struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL); + struct pcidev_cookie *cookie = kzalloc(sizeof(*cookie), GFP_KERNEL); if (!cookie) { prom_printf("SABRE: Critical allocation failure.\n"); @@ -1175,7 +1175,6 @@ static struct pcidev_cookie *alloc_bridge_cookie(struct pci_pbm_info *pbm) } /* All we care about is the PBM. */ - memset(cookie, 0, sizeof(*cookie)); cookie->pbm = pbm; return cookie; @@ -1556,19 +1555,17 @@ void sabre_init(int pnode, char *model_name) } } - p = kmalloc(sizeof(*p), GFP_ATOMIC); + p = kzalloc(sizeof(*p), GFP_ATOMIC); if (!p) { prom_printf("SABRE: Error, kmalloc(pci_controller_info) failed.\n"); prom_halt(); } - memset(p, 0, sizeof(*p)); - iommu = kmalloc(sizeof(*iommu), GFP_ATOMIC); + iommu = kzalloc(sizeof(*iommu), GFP_ATOMIC); if (!iommu) { prom_printf("SABRE: Error, kmalloc(pci_iommu) failed.\n"); prom_halt(); } - memset(iommu, 0, sizeof(*iommu)); p->pbm_A.iommu = p->pbm_B.iommu = iommu; upa_portid = prom_getintdefault(pnode, "upa-portid", 0xff); diff --git a/arch/sparc64/kernel/pci_schizo.c b/arch/sparc64/kernel/pci_schizo.c index d8c4e0919b4..7fe4de03ac2 100644 --- a/arch/sparc64/kernel/pci_schizo.c +++ b/arch/sparc64/kernel/pci_schizo.c @@ -243,8 +243,8 @@ static unsigned char schizo_pil_table[] = { /*0x0c*/0, 0, 0, 0, /* PCI slot 3 Int A, B, C, D */ /*0x10*/0, 0, 0, 0, /* PCI slot 4 Int A, B, C, D */ /*0x14*/0, 0, 0, 0, /* PCI slot 5 Int A, B, C, D */ -/*0x18*/4, /* SCSI */ -/*0x19*/4, /* second SCSI */ +/*0x18*/5, /* SCSI */ +/*0x19*/5, /* second SCSI */ /*0x1a*/0, /* UNKNOWN */ /*0x1b*/0, /* UNKNOWN */ /*0x1c*/8, /* Parallel */ @@ -254,7 +254,7 @@ static unsigned char schizo_pil_table[] = { /*0x20*/13, /* Audio Record */ /*0x21*/14, /* Audio Playback */ /*0x22*/12, /* Serial */ -/*0x23*/4, /* EBUS I2C */ +/*0x23*/5, /* EBUS I2C */ /*0x24*/10, /* RTC Clock */ /*0x25*/11, /* Floppy */ /*0x26*/0, /* UNKNOWN */ @@ -296,11 +296,11 @@ static int schizo_ino_to_pil(struct pci_dev *pdev, unsigned int ino) ret = schizo_pil_table[ino]; if (ret == 0 && pdev == NULL) { - ret = 4; + ret = 5; } else if (ret == 0) { switch ((pdev->class >> 16) & 0xff) { case PCI_BASE_CLASS_STORAGE: - ret = 4; + ret = 5; break; case PCI_BASE_CLASS_NETWORK: @@ -319,7 +319,7 @@ static int schizo_ino_to_pil(struct pci_dev *pdev, unsigned int ino) break; default: - ret = 4; + ret = 5; break; }; } @@ -1525,7 +1525,7 @@ static void pbm_config_busmastering(struct pci_pbm_info *pbm) static void pbm_scan_bus(struct pci_controller_info *p, struct pci_pbm_info *pbm) { - struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL); + struct pcidev_cookie *cookie = kzalloc(sizeof(*cookie), GFP_KERNEL); if (!cookie) { prom_printf("%s: Critical allocation failure.\n", pbm->name); @@ -1533,7 +1533,6 @@ static void pbm_scan_bus(struct pci_controller_info *p, } /* All we care about is the PBM. */ - memset(cookie, 0, sizeof(*cookie)); cookie->pbm = pbm; pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, @@ -2120,27 +2119,24 @@ static void __schizo_init(int node, char *model_name, int chip_type) } } - p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); + p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); if (!p) { prom_printf("SCHIZO: Fatal memory allocation error.\n"); prom_halt(); } - memset(p, 0, sizeof(*p)); - iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC); + iommu = kzalloc(sizeof(struct pci_iommu), GFP_ATOMIC); if (!iommu) { prom_printf("SCHIZO: Fatal memory allocation error.\n"); prom_halt(); } - memset(iommu, 0, sizeof(*iommu)); p->pbm_A.iommu = iommu; - iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC); + iommu = kzalloc(sizeof(struct pci_iommu), GFP_ATOMIC); if (!iommu) { prom_printf("SCHIZO: Fatal memory allocation error.\n"); prom_halt(); } - memset(iommu, 0, sizeof(*iommu)); p->pbm_B.iommu = iommu; p->next = pci_controller_root; diff --git a/arch/sparc64/kernel/pci_sun4v.c b/arch/sparc64/kernel/pci_sun4v.c new file mode 100644 index 00000000000..9372d4f376d --- /dev/null +++ b/arch/sparc64/kernel/pci_sun4v.c @@ -0,0 +1,1147 @@ +/* pci_sun4v.c: SUN4V specific PCI controller support. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/slab.h> +#include <linux/interrupt.h> +#include <linux/percpu.h> + +#include <asm/pbm.h> +#include <asm/iommu.h> +#include <asm/irq.h> +#include <asm/upa.h> +#include <asm/pstate.h> +#include <asm/oplib.h> +#include <asm/hypervisor.h> + +#include "pci_impl.h" +#include "iommu_common.h" + +#include "pci_sun4v.h" + +#define PGLIST_NENTS (PAGE_SIZE / sizeof(u64)) + +struct pci_iommu_batch { + struct pci_dev *pdev; /* Device mapping is for. */ + unsigned long prot; /* IOMMU page protections */ + unsigned long entry; /* Index into IOTSB. */ + u64 *pglist; /* List of physical pages */ + unsigned long npages; /* Number of pages in list. */ +}; + +static DEFINE_PER_CPU(struct pci_iommu_batch, pci_iommu_batch); + +/* Interrupts must be disabled. */ +static inline void pci_iommu_batch_start(struct pci_dev *pdev, unsigned long prot, unsigned long entry) +{ + struct pci_iommu_batch *p = &__get_cpu_var(pci_iommu_batch); + + p->pdev = pdev; + p->prot = prot; + p->entry = entry; + p->npages = 0; +} + +/* Interrupts must be disabled. */ +static long pci_iommu_batch_flush(struct pci_iommu_batch *p) +{ + struct pcidev_cookie *pcp = p->pdev->sysdata; + unsigned long devhandle = pcp->pbm->devhandle; + unsigned long prot = p->prot; + unsigned long entry = p->entry; + u64 *pglist = p->pglist; + unsigned long npages = p->npages; + + while (npages != 0) { + long num; + + num = pci_sun4v_iommu_map(devhandle, HV_PCI_TSBID(0, entry), + npages, prot, __pa(pglist)); + if (unlikely(num < 0)) { + if (printk_ratelimit()) + printk("pci_iommu_batch_flush: IOMMU map of " + "[%08lx:%08lx:%lx:%lx:%lx] failed with " + "status %ld\n", + devhandle, HV_PCI_TSBID(0, entry), + npages, prot, __pa(pglist), num); + return -1; + } + + entry += num; + npages -= num; + pglist += num; + } + + p->entry = entry; + p->npages = 0; + + return 0; +} + +/* Interrupts must be disabled. */ +static inline long pci_iommu_batch_add(u64 phys_page) +{ + struct pci_iommu_batch *p = &__get_cpu_var(pci_iommu_batch); + + BUG_ON(p->npages >= PGLIST_NENTS); + + p->pglist[p->npages++] = phys_page; + if (p->npages == PGLIST_NENTS) + return pci_iommu_batch_flush(p); + + return 0; +} + +/* Interrupts must be disabled. */ +static inline long pci_iommu_batch_end(void) +{ + struct pci_iommu_batch *p = &__get_cpu_var(pci_iommu_batch); + + BUG_ON(p->npages >= PGLIST_NENTS); + + return pci_iommu_batch_flush(p); +} + +static long pci_arena_alloc(struct pci_iommu_arena *arena, unsigned long npages) +{ + unsigned long n, i, start, end, limit; + int pass; + + limit = arena->limit; + start = arena->hint; + pass = 0; + +again: + n = find_next_zero_bit(arena->map, limit, start); + end = n + npages; + if (unlikely(end >= limit)) { + if (likely(pass < 1)) { + limit = start; + start = 0; + pass++; + goto again; + } else { + /* Scanned the whole thing, give up. */ + return -1; + } + } + + for (i = n; i < end; i++) { + if (test_bit(i, arena->map)) { + start = i + 1; + goto again; + } + } + + for (i = n; i < end; i++) + __set_bit(i, arena->map); + + arena->hint = end; + + return n; +} + +static void pci_arena_free(struct pci_iommu_arena *arena, unsigned long base, unsigned long npages) +{ + unsigned long i; + + for (i = base; i < (base + npages); i++) + __clear_bit(i, arena->map); +} + +static void *pci_4v_alloc_consistent(struct pci_dev *pdev, size_t size, dma_addr_t *dma_addrp) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, order, first_page, npages, n; + void *ret; + long entry; + + size = IO_PAGE_ALIGN(size); + order = get_order(size); + if (unlikely(order >= MAX_ORDER)) + return NULL; + + npages = size >> IO_PAGE_SHIFT; + + first_page = __get_free_pages(GFP_ATOMIC, order); + if (unlikely(first_page == 0UL)) + return NULL; + + memset((char *)first_page, 0, PAGE_SIZE << order); + + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + + spin_lock_irqsave(&iommu->lock, flags); + entry = pci_arena_alloc(&iommu->arena, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + + if (unlikely(entry < 0L)) + goto arena_alloc_fail; + + *dma_addrp = (iommu->page_table_map_base + + (entry << IO_PAGE_SHIFT)); + ret = (void *) first_page; + first_page = __pa(first_page); + + local_irq_save(flags); + + pci_iommu_batch_start(pdev, + (HV_PCI_MAP_ATTR_READ | + HV_PCI_MAP_ATTR_WRITE), + entry); + + for (n = 0; n < npages; n++) { + long err = pci_iommu_batch_add(first_page + (n * PAGE_SIZE)); + if (unlikely(err < 0L)) + goto iommu_map_fail; + } + + if (unlikely(pci_iommu_batch_end() < 0L)) + goto iommu_map_fail; + + local_irq_restore(flags); + + return ret; + +iommu_map_fail: + /* Interrupts are disabled. */ + spin_lock(&iommu->lock); + pci_arena_free(&iommu->arena, entry, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + +arena_alloc_fail: + free_pages(first_page, order); + return NULL; +} + +static void pci_4v_free_consistent(struct pci_dev *pdev, size_t size, void *cpu, dma_addr_t dvma) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, order, npages, entry; + u32 devhandle; + + npages = IO_PAGE_ALIGN(size) >> IO_PAGE_SHIFT; + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + devhandle = pcp->pbm->devhandle; + entry = ((dvma - iommu->page_table_map_base) >> IO_PAGE_SHIFT); + + spin_lock_irqsave(&iommu->lock, flags); + + pci_arena_free(&iommu->arena, entry, npages); + + do { + unsigned long num; + + num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), + npages); + entry += num; + npages -= num; + } while (npages != 0); + + spin_unlock_irqrestore(&iommu->lock, flags); + + order = get_order(size); + if (order < 10) + free_pages((unsigned long)cpu, order); +} + +static dma_addr_t pci_4v_map_single(struct pci_dev *pdev, void *ptr, size_t sz, int direction) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, npages, oaddr; + unsigned long i, base_paddr; + u32 bus_addr, ret; + unsigned long prot; + long entry; + + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + + if (unlikely(direction == PCI_DMA_NONE)) + goto bad; + + oaddr = (unsigned long)ptr; + npages = IO_PAGE_ALIGN(oaddr + sz) - (oaddr & IO_PAGE_MASK); + npages >>= IO_PAGE_SHIFT; + + spin_lock_irqsave(&iommu->lock, flags); + entry = pci_arena_alloc(&iommu->arena, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + + if (unlikely(entry < 0L)) + goto bad; + + bus_addr = (iommu->page_table_map_base + + (entry << IO_PAGE_SHIFT)); + ret = bus_addr | (oaddr & ~IO_PAGE_MASK); + base_paddr = __pa(oaddr & IO_PAGE_MASK); + prot = HV_PCI_MAP_ATTR_READ; + if (direction != PCI_DMA_TODEVICE) + prot |= HV_PCI_MAP_ATTR_WRITE; + + local_irq_save(flags); + + pci_iommu_batch_start(pdev, prot, entry); + + for (i = 0; i < npages; i++, base_paddr += IO_PAGE_SIZE) { + long err = pci_iommu_batch_add(base_paddr); + if (unlikely(err < 0L)) + goto iommu_map_fail; + } + if (unlikely(pci_iommu_batch_end() < 0L)) + goto iommu_map_fail; + + local_irq_restore(flags); + + return ret; + +bad: + if (printk_ratelimit()) + WARN_ON(1); + return PCI_DMA_ERROR_CODE; + +iommu_map_fail: + /* Interrupts are disabled. */ + spin_lock(&iommu->lock); + pci_arena_free(&iommu->arena, entry, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + + return PCI_DMA_ERROR_CODE; +} + +static void pci_4v_unmap_single(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, npages; + long entry; + u32 devhandle; + + if (unlikely(direction == PCI_DMA_NONE)) { + if (printk_ratelimit()) + WARN_ON(1); + return; + } + + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + devhandle = pcp->pbm->devhandle; + + npages = IO_PAGE_ALIGN(bus_addr + sz) - (bus_addr & IO_PAGE_MASK); + npages >>= IO_PAGE_SHIFT; + bus_addr &= IO_PAGE_MASK; + + spin_lock_irqsave(&iommu->lock, flags); + + entry = (bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT; + pci_arena_free(&iommu->arena, entry, npages); + + do { + unsigned long num; + + num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), + npages); + entry += num; + npages -= num; + } while (npages != 0); + + spin_unlock_irqrestore(&iommu->lock, flags); +} + +#define SG_ENT_PHYS_ADDRESS(SG) \ + (__pa(page_address((SG)->page)) + (SG)->offset) + +static inline long fill_sg(long entry, struct pci_dev *pdev, + struct scatterlist *sg, + int nused, int nelems, unsigned long prot) +{ + struct scatterlist *dma_sg = sg; + struct scatterlist *sg_end = sg + nelems; + unsigned long flags; + int i; + + local_irq_save(flags); + + pci_iommu_batch_start(pdev, prot, entry); + + for (i = 0; i < nused; i++) { + unsigned long pteval = ~0UL; + u32 dma_npages; + + dma_npages = ((dma_sg->dma_address & (IO_PAGE_SIZE - 1UL)) + + dma_sg->dma_length + + ((IO_PAGE_SIZE - 1UL))) >> IO_PAGE_SHIFT; + do { + unsigned long offset; + signed int len; + + /* If we are here, we know we have at least one + * more page to map. So walk forward until we + * hit a page crossing, and begin creating new + * mappings from that spot. + */ + for (;;) { + unsigned long tmp; + + tmp = SG_ENT_PHYS_ADDRESS(sg); + len = sg->length; + if (((tmp ^ pteval) >> IO_PAGE_SHIFT) != 0UL) { + pteval = tmp & IO_PAGE_MASK; + offset = tmp & (IO_PAGE_SIZE - 1UL); + break; + } + if (((tmp ^ (tmp + len - 1UL)) >> IO_PAGE_SHIFT) != 0UL) { + pteval = (tmp + IO_PAGE_SIZE) & IO_PAGE_MASK; + offset = 0UL; + len -= (IO_PAGE_SIZE - (tmp & (IO_PAGE_SIZE - 1UL))); + break; + } + sg++; + } + + pteval = (pteval & IOPTE_PAGE); + while (len > 0) { + long err; + + err = pci_iommu_batch_add(pteval); + if (unlikely(err < 0L)) + goto iommu_map_failed; + + pteval += IO_PAGE_SIZE; + len -= (IO_PAGE_SIZE - offset); + offset = 0; + dma_npages--; + } + + pteval = (pteval & IOPTE_PAGE) + len; + sg++; + + /* Skip over any tail mappings we've fully mapped, + * adjusting pteval along the way. Stop when we + * detect a page crossing event. + */ + while (sg < sg_end && + (pteval << (64 - IO_PAGE_SHIFT)) != 0UL && + (pteval == SG_ENT_PHYS_ADDRESS(sg)) && + ((pteval ^ + (SG_ENT_PHYS_ADDRESS(sg) + sg->length - 1UL)) >> IO_PAGE_SHIFT) == 0UL) { + pteval += sg->length; + sg++; + } + if ((pteval << (64 - IO_PAGE_SHIFT)) == 0UL) + pteval = ~0UL; + } while (dma_npages != 0); + dma_sg++; + } + + if (unlikely(pci_iommu_batch_end() < 0L)) + goto iommu_map_failed; + + local_irq_restore(flags); + return 0; + +iommu_map_failed: + local_irq_restore(flags); + return -1L; +} + +static int pci_4v_map_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, npages, prot; + u32 dma_base; + struct scatterlist *sgtmp; + long entry, err; + int used; + + /* Fast path single entry scatterlists. */ + if (nelems == 1) { + sglist->dma_address = + pci_4v_map_single(pdev, + (page_address(sglist->page) + sglist->offset), + sglist->length, direction); + if (unlikely(sglist->dma_address == PCI_DMA_ERROR_CODE)) + return 0; + sglist->dma_length = sglist->length; + return 1; + } + + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + + if (unlikely(direction == PCI_DMA_NONE)) + goto bad; + + /* Step 1: Prepare scatter list. */ + npages = prepare_sg(sglist, nelems); + + /* Step 2: Allocate a cluster and context, if necessary. */ + spin_lock_irqsave(&iommu->lock, flags); + entry = pci_arena_alloc(&iommu->arena, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + + if (unlikely(entry < 0L)) + goto bad; + + dma_base = iommu->page_table_map_base + + (entry << IO_PAGE_SHIFT); + + /* Step 3: Normalize DMA addresses. */ + used = nelems; + + sgtmp = sglist; + while (used && sgtmp->dma_length) { + sgtmp->dma_address += dma_base; + sgtmp++; + used--; + } + used = nelems - used; + + /* Step 4: Create the mappings. */ + prot = HV_PCI_MAP_ATTR_READ; + if (direction != PCI_DMA_TODEVICE) + prot |= HV_PCI_MAP_ATTR_WRITE; + + err = fill_sg(entry, pdev, sglist, used, nelems, prot); + if (unlikely(err < 0L)) + goto iommu_map_failed; + + return used; + +bad: + if (printk_ratelimit()) + WARN_ON(1); + return 0; + +iommu_map_failed: + spin_lock_irqsave(&iommu->lock, flags); + pci_arena_free(&iommu->arena, entry, npages); + spin_unlock_irqrestore(&iommu->lock, flags); + + return 0; +} + +static void pci_4v_unmap_sg(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +{ + struct pcidev_cookie *pcp; + struct pci_iommu *iommu; + unsigned long flags, i, npages; + long entry; + u32 devhandle, bus_addr; + + if (unlikely(direction == PCI_DMA_NONE)) { + if (printk_ratelimit()) + WARN_ON(1); + } + + pcp = pdev->sysdata; + iommu = pcp->pbm->iommu; + devhandle = pcp->pbm->devhandle; + + bus_addr = sglist->dma_address & IO_PAGE_MASK; + + for (i = 1; i < nelems; i++) + if (sglist[i].dma_length == 0) + break; + i--; + npages = (IO_PAGE_ALIGN(sglist[i].dma_address + sglist[i].dma_length) - + bus_addr) >> IO_PAGE_SHIFT; + + entry = ((bus_addr - iommu->page_table_map_base) >> IO_PAGE_SHIFT); + + spin_lock_irqsave(&iommu->lock, flags); + + pci_arena_free(&iommu->arena, entry, npages); + + do { + unsigned long num; + + num = pci_sun4v_iommu_demap(devhandle, HV_PCI_TSBID(0, entry), + npages); + entry += num; + npages -= num; + } while (npages != 0); + + spin_unlock_irqrestore(&iommu->lock, flags); +} + +static void pci_4v_dma_sync_single_for_cpu(struct pci_dev *pdev, dma_addr_t bus_addr, size_t sz, int direction) +{ + /* Nothing to do... */ +} + +static void pci_4v_dma_sync_sg_for_cpu(struct pci_dev *pdev, struct scatterlist *sglist, int nelems, int direction) +{ + /* Nothing to do... */ +} + +struct pci_iommu_ops pci_sun4v_iommu_ops = { + .alloc_consistent = pci_4v_alloc_consistent, + .free_consistent = pci_4v_free_consistent, + .map_single = pci_4v_map_single, + .unmap_single = pci_4v_unmap_single, + .map_sg = pci_4v_map_sg, + .unmap_sg = pci_4v_unmap_sg, + .dma_sync_single_for_cpu = pci_4v_dma_sync_single_for_cpu, + .dma_sync_sg_for_cpu = pci_4v_dma_sync_sg_for_cpu, +}; + +/* SUN4V PCI configuration space accessors. */ + +static inline int pci_sun4v_out_of_range(struct pci_pbm_info *pbm, unsigned int bus, unsigned int device, unsigned int func) +{ + if (bus == pbm->pci_first_busno) { + if (device == 0 && func == 0) + return 0; + return 1; + } + + if (bus < pbm->pci_first_busno || + bus > pbm->pci_last_busno) + return 1; + return 0; +} + +static int pci_sun4v_read_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 *value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + u32 devhandle = pbm->devhandle; + unsigned int bus = bus_dev->number; + unsigned int device = PCI_SLOT(devfn); + unsigned int func = PCI_FUNC(devfn); + unsigned long ret; + + if (pci_sun4v_out_of_range(pbm, bus, device, func)) { + ret = ~0UL; + } else { + ret = pci_sun4v_config_get(devhandle, + HV_PCI_DEVICE_BUILD(bus, device, func), + where, size); +#if 0 + printk("rcfg: [%x:%x:%x:%d]=[%lx]\n", + devhandle, HV_PCI_DEVICE_BUILD(bus, device, func), + where, size, ret); +#endif + } + switch (size) { + case 1: + *value = ret & 0xff; + break; + case 2: + *value = ret & 0xffff; + break; + case 4: + *value = ret & 0xffffffff; + break; + }; + + + return PCIBIOS_SUCCESSFUL; +} + +static int pci_sun4v_write_pci_cfg(struct pci_bus *bus_dev, unsigned int devfn, + int where, int size, u32 value) +{ + struct pci_pbm_info *pbm = bus_dev->sysdata; + u32 devhandle = pbm->devhandle; + unsigned int bus = bus_dev->number; + unsigned int device = PCI_SLOT(devfn); + unsigned int func = PCI_FUNC(devfn); + unsigned long ret; + + if (pci_sun4v_out_of_range(pbm, bus, device, func)) { + /* Do nothing. */ + } else { + ret = pci_sun4v_config_put(devhandle, + HV_PCI_DEVICE_BUILD(bus, device, func), + where, size, value); +#if 0 + printk("wcfg: [%x:%x:%x:%d] v[%x] == [%lx]\n", + devhandle, HV_PCI_DEVICE_BUILD(bus, device, func), + where, size, value, ret); +#endif + } + return PCIBIOS_SUCCESSFUL; +} + +static struct pci_ops pci_sun4v_ops = { + .read = pci_sun4v_read_pci_cfg, + .write = pci_sun4v_write_pci_cfg, +}; + + +static void pbm_scan_bus(struct pci_controller_info *p, + struct pci_pbm_info *pbm) +{ + struct pcidev_cookie *cookie = kmalloc(sizeof(*cookie), GFP_KERNEL); + + if (!cookie) { + prom_printf("%s: Critical allocation failure.\n", pbm->name); + prom_halt(); + } + + /* All we care about is the PBM. */ + memset(cookie, 0, sizeof(*cookie)); + cookie->pbm = pbm; + + pbm->pci_bus = pci_scan_bus(pbm->pci_first_busno, p->pci_ops, pbm); +#if 0 + pci_fixup_host_bridge_self(pbm->pci_bus); + pbm->pci_bus->self->sysdata = cookie; +#endif + pci_fill_in_pbm_cookies(pbm->pci_bus, pbm, + pbm->prom_node); + pci_record_assignments(pbm, pbm->pci_bus); + pci_assign_unassigned(pbm, pbm->pci_bus); + pci_fixup_irq(pbm, pbm->pci_bus); + pci_determine_66mhz_disposition(pbm, pbm->pci_bus); + pci_setup_busmastering(pbm, pbm->pci_bus); +} + +static void pci_sun4v_scan_bus(struct pci_controller_info *p) +{ + if (p->pbm_A.prom_node) { + p->pbm_A.is_66mhz_capable = + prom_getbool(p->pbm_A.prom_node, "66mhz-capable"); + + pbm_scan_bus(p, &p->pbm_A); + } + if (p->pbm_B.prom_node) { + p->pbm_B.is_66mhz_capable = + prom_getbool(p->pbm_B.prom_node, "66mhz-capable"); + + pbm_scan_bus(p, &p->pbm_B); + } + + /* XXX register error interrupt handlers XXX */ +} + +static unsigned int pci_sun4v_irq_build(struct pci_pbm_info *pbm, + struct pci_dev *pdev, + unsigned int devino) +{ + u32 devhandle = pbm->devhandle; + int pil; + + pil = 5; + if (pdev) { + switch ((pdev->class >> 16) & 0xff) { + case PCI_BASE_CLASS_STORAGE: + pil = 5; + break; + + case PCI_BASE_CLASS_NETWORK: + pil = 6; + break; + + case PCI_BASE_CLASS_DISPLAY: + pil = 9; + break; + + case PCI_BASE_CLASS_MULTIMEDIA: + case PCI_BASE_CLASS_MEMORY: + case PCI_BASE_CLASS_BRIDGE: + case PCI_BASE_CLASS_SERIAL: + pil = 10; + break; + + default: + pil = 5; + break; + }; + } + BUG_ON(PIL_RESERVED(pil)); + + return sun4v_build_irq(devhandle, devino, pil, IBF_PCI); +} + +static void pci_sun4v_base_address_update(struct pci_dev *pdev, int resource) +{ + struct pcidev_cookie *pcp = pdev->sysdata; + struct pci_pbm_info *pbm = pcp->pbm; + struct resource *res, *root; + u32 reg; + int where, size, is_64bit; + + res = &pdev->resource[resource]; + if (resource < 6) { + where = PCI_BASE_ADDRESS_0 + (resource * 4); + } else if (resource == PCI_ROM_RESOURCE) { + where = pdev->rom_base_reg; + } else { + /* Somebody might have asked allocation of a non-standard resource */ + return; + } + + /* XXX 64-bit MEM handling is not %100 correct... XXX */ + is_64bit = 0; + if (res->flags & IORESOURCE_IO) + root = &pbm->io_space; + else { + root = &pbm->mem_space; + if ((res->flags & PCI_BASE_ADDRESS_MEM_TYPE_MASK) + == PCI_BASE_ADDRESS_MEM_TYPE_64) + is_64bit = 1; + } + + size = res->end - res->start; + pci_read_config_dword(pdev, where, ®); + reg = ((reg & size) | + (((u32)(res->start - root->start)) & ~size)); + if (resource == PCI_ROM_RESOURCE) { + reg |= PCI_ROM_ADDRESS_ENABLE; + res->flags |= IORESOURCE_ROM_ENABLE; + } + pci_write_config_dword(pdev, where, reg); + + /* This knows that the upper 32-bits of the address + * must be zero. Our PCI common layer enforces this. + */ + if (is_64bit) + pci_write_config_dword(pdev, where + 4, 0); +} + +static void pci_sun4v_resource_adjust(struct pci_dev *pdev, + struct resource *res, + struct resource *root) +{ + res->start += root->start; + res->end += root->start; +} + +/* Use ranges property to determine where PCI MEM, I/O, and Config + * space are for this PCI bus module. + */ +static void pci_sun4v_determine_mem_io_space(struct pci_pbm_info *pbm) +{ + int i, saw_mem, saw_io; + + saw_mem = saw_io = 0; + for (i = 0; i < pbm->num_pbm_ranges; i++) { + struct linux_prom_pci_ranges *pr = &pbm->pbm_ranges[i]; + unsigned long a; + int type; + + type = (pr->child_phys_hi >> 24) & 0x3; + a = (((unsigned long)pr->parent_phys_hi << 32UL) | + ((unsigned long)pr->parent_phys_lo << 0UL)); + + switch (type) { + case 1: + /* 16-bit IO space, 16MB */ + pbm->io_space.start = a; + pbm->io_space.end = a + ((16UL*1024UL*1024UL) - 1UL); + pbm->io_space.flags = IORESOURCE_IO; + saw_io = 1; + break; + + case 2: + /* 32-bit MEM space, 2GB */ + pbm->mem_space.start = a; + pbm->mem_space.end = a + (0x80000000UL - 1UL); + pbm->mem_space.flags = IORESOURCE_MEM; + saw_mem = 1; + break; + + case 3: + /* XXX 64-bit MEM handling XXX */ + + default: + break; + }; + } + + if (!saw_io || !saw_mem) { + prom_printf("%s: Fatal error, missing %s PBM range.\n", + pbm->name, + (!saw_io ? "IO" : "MEM")); + prom_halt(); + } + + printk("%s: PCI IO[%lx] MEM[%lx]\n", + pbm->name, + pbm->io_space.start, + pbm->mem_space.start); +} + +static void pbm_register_toplevel_resources(struct pci_controller_info *p, + struct pci_pbm_info *pbm) +{ + pbm->io_space.name = pbm->mem_space.name = pbm->name; + + request_resource(&ioport_resource, &pbm->io_space); + request_resource(&iomem_resource, &pbm->mem_space); + pci_register_legacy_regions(&pbm->io_space, + &pbm->mem_space); +} + +static unsigned long probe_existing_entries(struct pci_pbm_info *pbm, + struct pci_iommu *iommu) +{ + struct pci_iommu_arena *arena = &iommu->arena; + unsigned long i, cnt = 0; + u32 devhandle; + + devhandle = pbm->devhandle; + for (i = 0; i < arena->limit; i++) { + unsigned long ret, io_attrs, ra; + + ret = pci_sun4v_iommu_getmap(devhandle, + HV_PCI_TSBID(0, i), + &io_attrs, &ra); + if (ret == HV_EOK) { + cnt++; + __set_bit(i, arena->map); + } + } + + return cnt; +} + +static void pci_sun4v_iommu_init(struct pci_pbm_info *pbm) +{ + struct pci_iommu *iommu = pbm->iommu; + unsigned long num_tsb_entries, sz; + u32 vdma[2], dma_mask, dma_offset; + int err, tsbsize; + + err = prom_getproperty(pbm->prom_node, "virtual-dma", + (char *)&vdma[0], sizeof(vdma)); + if (err == 0 || err == -1) { + /* No property, use default values. */ + vdma[0] = 0x80000000; + vdma[1] = 0x80000000; + } + + dma_mask = vdma[0]; + switch (vdma[1]) { + case 0x20000000: + dma_mask |= 0x1fffffff; + tsbsize = 64; + break; + + case 0x40000000: + dma_mask |= 0x3fffffff; + tsbsize = 128; + break; + + case 0x80000000: + dma_mask |= 0x7fffffff; + tsbsize = 256; + break; + + default: + prom_printf("PCI-SUN4V: strange virtual-dma size.\n"); + prom_halt(); + }; + + tsbsize *= (8 * 1024); + + num_tsb_entries = tsbsize / sizeof(iopte_t); + + dma_offset = vdma[0]; + + /* Setup initial software IOMMU state. */ + spin_lock_init(&iommu->lock); + iommu->ctx_lowest_free = 1; + iommu->page_table_map_base = dma_offset; + iommu->dma_addr_mask = dma_mask; + + /* Allocate and initialize the free area map. */ + sz = num_tsb_entries / 8; + sz = (sz + 7UL) & ~7UL; + iommu->arena.map = kmalloc(sz, GFP_KERNEL); + if (!iommu->arena.map) { + prom_printf("PCI_IOMMU: Error, kmalloc(arena.map) failed.\n"); + prom_halt(); + } + memset(iommu->arena.map, 0, sz); + iommu->arena.limit = num_tsb_entries; + + sz = probe_existing_entries(pbm, iommu); + + printk("%s: TSB entries [%lu], existing mapings [%lu]\n", + pbm->name, num_tsb_entries, sz); +} + +static void pci_sun4v_get_bus_range(struct pci_pbm_info *pbm) +{ + unsigned int busrange[2]; + int prom_node = pbm->prom_node; + int err; + + err = prom_getproperty(prom_node, "bus-range", + (char *)&busrange[0], + sizeof(busrange)); + if (err == 0 || err == -1) { + prom_printf("%s: Fatal error, no bus-range.\n", pbm->name); + prom_halt(); + } + + pbm->pci_first_busno = busrange[0]; + pbm->pci_last_busno = busrange[1]; + +} + +static void pci_sun4v_pbm_init(struct pci_controller_info *p, int prom_node, u32 devhandle) +{ + struct pci_pbm_info *pbm; + int err, i; + + if (devhandle & 0x40) + pbm = &p->pbm_B; + else + pbm = &p->pbm_A; + + pbm->parent = p; + pbm->prom_node = prom_node; + pbm->pci_first_slot = 1; + + pbm->devhandle = devhandle; + + sprintf(pbm->name, "SUN4V-PCI%d PBM%c", + p->index, (pbm == &p->pbm_A ? 'A' : 'B')); + + printk("%s: devhandle[%x] prom_node[%x:%x]\n", + pbm->name, pbm->devhandle, + pbm->prom_node, prom_getchild(pbm->prom_node)); + + prom_getstring(prom_node, "name", + pbm->prom_name, sizeof(pbm->prom_name)); + + err = prom_getproperty(prom_node, "ranges", + (char *) pbm->pbm_ranges, + sizeof(pbm->pbm_ranges)); + if (err == 0 || err == -1) { + prom_printf("%s: Fatal error, no ranges property.\n", + pbm->name); + prom_halt(); + } + + pbm->num_pbm_ranges = + (err / sizeof(struct linux_prom_pci_ranges)); + + /* Mask out the top 8 bits of the ranges, leaving the real + * physical address. + */ + for (i = 0; i < pbm->num_pbm_ranges; i++) + pbm->pbm_ranges[i].parent_phys_hi &= 0x0fffffff; + + pci_sun4v_determine_mem_io_space(pbm); + pbm_register_toplevel_resources(p, pbm); + + err = prom_getproperty(prom_node, "interrupt-map", + (char *)pbm->pbm_intmap, + sizeof(pbm->pbm_intmap)); + if (err == 0 || err == -1) { + prom_printf("%s: Fatal error, no interrupt-map property.\n", + pbm->name); + prom_halt(); + } + + pbm->num_pbm_intmap = (err / sizeof(struct linux_prom_pci_intmap)); + err = prom_getproperty(prom_node, "interrupt-map-mask", + (char *)&pbm->pbm_intmask, + sizeof(pbm->pbm_intmask)); + if (err == 0 || err == -1) { + prom_printf("%s: Fatal error, no interrupt-map-mask.\n", + pbm->name); + prom_halt(); + } + + pci_sun4v_get_bus_range(pbm); + pci_sun4v_iommu_init(pbm); +} + +void sun4v_pci_init(int node, char *model_name) +{ + struct pci_controller_info *p; + struct pci_iommu *iommu; + struct linux_prom64_registers regs; + u32 devhandle; + int i; + + prom_getproperty(node, "reg", (char *)®s, sizeof(regs)); + devhandle = (regs.phys_addr >> 32UL) & 0x0fffffff; + + for (p = pci_controller_root; p; p = p->next) { + struct pci_pbm_info *pbm; + + if (p->pbm_A.prom_node && p->pbm_B.prom_node) + continue; + + pbm = (p->pbm_A.prom_node ? + &p->pbm_A : + &p->pbm_B); + + if (pbm->devhandle == (devhandle ^ 0x40)) { + pci_sun4v_pbm_init(p, node, devhandle); + return; + } + } + + for_each_cpu(i) { + unsigned long page = get_zeroed_page(GFP_ATOMIC); + + if (!page) + goto fatal_memory_error; + + per_cpu(pci_iommu_batch, i).pglist = (u64 *) page; + } + + p = kmalloc(sizeof(struct pci_controller_info), GFP_ATOMIC); + if (!p) + goto fatal_memory_error; + + memset(p, 0, sizeof(*p)); + + iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC); + if (!iommu) + goto fatal_memory_error; + + memset(iommu, 0, sizeof(*iommu)); + p->pbm_A.iommu = iommu; + + iommu = kmalloc(sizeof(struct pci_iommu), GFP_ATOMIC); + if (!iommu) + goto fatal_memory_error; + + memset(iommu, 0, sizeof(*iommu)); + p->pbm_B.iommu = iommu; + + p->next = pci_controller_root; + pci_controller_root = p; + + p->index = pci_num_controllers++; + p->pbms_same_domain = 0; + + p->scan_bus = pci_sun4v_scan_bus; + p->irq_build = pci_sun4v_irq_build; + p->base_address_update = pci_sun4v_base_address_update; + p->resource_adjust = pci_sun4v_resource_adjust; + p->pci_ops = &pci_sun4v_ops; + + /* Like PSYCHO and SCHIZO we have a 2GB aligned area + * for memory space. + */ + pci_memspace_mask = 0x7fffffffUL; + + pci_sun4v_pbm_init(p, node, devhandle); + return; + +fatal_memory_error: + prom_printf("SUN4V_PCI: Fatal memory allocation error.\n"); + prom_halt(); +} diff --git a/arch/sparc64/kernel/pci_sun4v.h b/arch/sparc64/kernel/pci_sun4v.h new file mode 100644 index 00000000000..884d25f6158 --- /dev/null +++ b/arch/sparc64/kernel/pci_sun4v.h @@ -0,0 +1,31 @@ +/* pci_sun4v.h: SUN4V specific PCI controller support. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ + +#ifndef _PCI_SUN4V_H +#define _PCI_SUN4V_H + +extern long pci_sun4v_iommu_map(unsigned long devhandle, + unsigned long tsbid, + unsigned long num_ttes, + unsigned long io_attributes, + unsigned long io_page_list_pa); +extern unsigned long pci_sun4v_iommu_demap(unsigned long devhandle, + unsigned long tsbid, + unsigned long num_ttes); +extern unsigned long pci_sun4v_iommu_getmap(unsigned long devhandle, + unsigned long tsbid, + unsigned long *io_attributes, + unsigned long *real_address); +extern unsigned long pci_sun4v_config_get(unsigned long devhandle, + unsigned long pci_device, + unsigned long config_offset, + unsigned long size); +extern int pci_sun4v_config_put(unsigned long devhandle, + unsigned long pci_device, + unsigned long config_offset, + unsigned long size, + unsigned long data); + +#endif /* !(_PCI_SUN4V_H) */ diff --git a/arch/sparc64/kernel/pci_sun4v_asm.S b/arch/sparc64/kernel/pci_sun4v_asm.S new file mode 100644 index 00000000000..6604fdbf746 --- /dev/null +++ b/arch/sparc64/kernel/pci_sun4v_asm.S @@ -0,0 +1,95 @@ +/* pci_sun4v_asm: Hypervisor calls for PCI support. + * + * Copyright (C) 2006 David S. Miller <davem@davemloft.net> + */ + +#include <asm/hypervisor.h> + + /* %o0: devhandle + * %o1: tsbid + * %o2: num ttes + * %o3: io_attributes + * %o4: io_page_list phys address + * + * returns %o0: -status if status was non-zero, else + * %o0: num pages mapped + */ + .globl pci_sun4v_iommu_map +pci_sun4v_iommu_map: + mov %o5, %g1 + mov HV_FAST_PCI_IOMMU_MAP, %o5 + ta HV_FAST_TRAP + brnz,pn %o0, 1f + sub %g0, %o0, %o0 + mov %o1, %o0 +1: retl + nop + + /* %o0: devhandle + * %o1: tsbid + * %o2: num ttes + * + * returns %o0: num ttes demapped + */ + .globl pci_sun4v_iommu_demap +pci_sun4v_iommu_demap: + mov HV_FAST_PCI_IOMMU_DEMAP, %o5 + ta HV_FAST_TRAP + retl + mov %o1, %o0 + + /* %o0: devhandle + * %o1: tsbid + * %o2: &io_attributes + * %o3: &real_address + * + * returns %o0: status + */ + .globl pci_sun4v_iommu_getmap +pci_sun4v_iommu_getmap: + mov %o2, %o4 + mov HV_FAST_PCI_IOMMU_GETMAP, %o5 + ta HV_FAST_TRAP + stx %o1, [%o4] + stx %o2, [%o3] + retl + mov %o0, %o0 + + /* %o0: devhandle + * %o1: pci_device + * %o2: pci_config_offset + * %o3: size + * + * returns %o0: data + * + * If there is an error, the data will be returned + * as all 1's. + */ + .globl pci_sun4v_config_get +pci_sun4v_config_get: + mov HV_FAST_PCI_CONFIG_GET, %o5 + ta HV_FAST_TRAP + brnz,a,pn %o1, 1f + mov -1, %o2 +1: retl + mov %o2, %o0 + + /* %o0: devhandle + * %o1: pci_device + * %o2: pci_config_offset + * %o3: size + * %o4: data + * + * returns %o0: status + * + * status will be zero if the operation completed + * successfully, else -1 if not + */ + .globl pci_sun4v_config_put +pci_sun4v_config_put: + mov HV_FAST_PCI_CONFIG_PUT, %o5 + ta HV_FAST_TRAP + brnz,a,pn %o1, 1f + mov -1, %o1 +1: retl + mov %o1, %o0 diff --git a/arch/sparc64/kernel/process.c b/arch/sparc64/kernel/process.c index 059b0d02522..1c7ca2f712d 100644 --- a/arch/sparc64/kernel/process.c +++ b/arch/sparc64/kernel/process.c @@ -44,83 +44,61 @@ #include <asm/fpumacro.h> #include <asm/head.h> #include <asm/cpudata.h> +#include <asm/mmu_context.h> #include <asm/unistd.h> +#include <asm/hypervisor.h> /* #define VERBOSE_SHOWREGS */ -/* - * Nothing special yet... - */ -void default_idle(void) -{ -} - -#ifndef CONFIG_SMP - -/* - * the idle loop on a Sparc... ;) - */ -void cpu_idle(void) +static void sparc64_yield(void) { - /* endless idle loop with no priority at all */ - for (;;) { - /* If current->work.need_resched is zero we should really - * setup for a system wakup event and execute a shutdown - * instruction. - * - * But this requires writing back the contents of the - * L2 cache etc. so implement this later. -DaveM - */ - while (!need_resched()) - barrier(); + if (tlb_type != hypervisor) + return; - preempt_enable_no_resched(); - schedule(); - preempt_disable(); - check_pgt_cache(); + clear_thread_flag(TIF_POLLING_NRFLAG); + smp_mb__after_clear_bit(); + + while (!need_resched()) { + unsigned long pstate; + + /* Disable interrupts. */ + __asm__ __volatile__( + "rdpr %%pstate, %0\n\t" + "andn %0, %1, %0\n\t" + "wrpr %0, %%g0, %%pstate" + : "=&r" (pstate) + : "i" (PSTATE_IE)); + + if (!need_resched()) + sun4v_cpu_yield(); + + /* Re-enable interrupts. */ + __asm__ __volatile__( + "rdpr %%pstate, %0\n\t" + "or %0, %1, %0\n\t" + "wrpr %0, %%g0, %%pstate" + : "=&r" (pstate) + : "i" (PSTATE_IE)); } -} -#else + set_thread_flag(TIF_POLLING_NRFLAG); +} -/* - * the idle loop on a UltraMultiPenguin... - * - * TIF_POLLING_NRFLAG is set because we do not sleep the cpu - * inside of the idler task, so an interrupt is not needed - * to get a clean fast response. - * - * XXX Reverify this assumption... -DaveM - * - * Addendum: We do want it to do something for the signal - * delivery case, we detect that by just seeing - * if we are trying to send this to an idler or not. - */ +/* The idle loop on sparc64. */ void cpu_idle(void) { - cpuinfo_sparc *cpuinfo = &local_cpu_data(); set_thread_flag(TIF_POLLING_NRFLAG); while(1) { if (need_resched()) { - cpuinfo->idle_volume = 0; preempt_enable_no_resched(); schedule(); preempt_disable(); - check_pgt_cache(); } - cpuinfo->idle_volume++; - - /* The store ordering is so that IRQ handlers on - * other cpus see our increasing idleness for the buddy - * redistribution algorithm. -DaveM - */ - membar_storeload_storestore(); + sparc64_yield(); } } -#endif - extern char reboot_command []; extern void (*prom_palette)(int); @@ -354,6 +332,7 @@ void show_regs(struct pt_regs *regs) extern long etrap, etraptl1; #endif __show_regs(regs); +#if 0 #ifdef CONFIG_SMP { extern void smp_report_regs(void); @@ -361,6 +340,7 @@ void show_regs(struct pt_regs *regs) smp_report_regs(); } #endif +#endif #ifdef VERBOSE_SHOWREGS if (regs->tpc >= &etrap && regs->tpc < &etraptl1 && @@ -433,30 +413,15 @@ void exit_thread(void) void flush_thread(void) { struct thread_info *t = current_thread_info(); + struct mm_struct *mm; if (t->flags & _TIF_ABI_PENDING) t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT); - if (t->task->mm) { - unsigned long pgd_cache = 0UL; - if (test_thread_flag(TIF_32BIT)) { - struct mm_struct *mm = t->task->mm; - pgd_t *pgd0 = &mm->pgd[0]; - pud_t *pud0 = pud_offset(pgd0, 0); + mm = t->task->mm; + if (mm) + tsb_context_switch(mm); - if (pud_none(*pud0)) { - pmd_t *page = pmd_alloc_one(mm, 0); - pud_set(pud0, page); - } - pgd_cache = get_pgd_cache(pgd0); - } - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (pgd_cache), - "r" (TSB_REG), - "i" (ASI_DMMU)); - } set_thread_wsaved(0); /* Turn off performance counters if on. */ @@ -555,6 +520,18 @@ void synchronize_user_stack(void) } } +static void stack_unaligned(unsigned long sp) +{ + siginfo_t info; + + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_ADRALN; + info.si_addr = (void __user *) sp; + info.si_trapno = 0; + force_sig_info(SIGBUS, &info, current); +} + void fault_in_user_windows(void) { struct thread_info *t = current_thread_info(); @@ -570,13 +547,17 @@ void fault_in_user_windows(void) flush_user_windows(); window = get_thread_wsaved(); - if (window != 0) { + if (likely(window != 0)) { window -= 1; do { unsigned long sp = (t->rwbuf_stkptrs[window] + bias); struct reg_window *rwin = &t->reg_window[window]; - if (copy_to_user((char __user *)sp, rwin, winsize)) + if (unlikely(sp & 0x7UL)) + stack_unaligned(sp); + + if (unlikely(copy_to_user((char __user *)sp, + rwin, winsize))) goto barf; } while (window--); } diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c index 3f9746f856d..eb93e9c5284 100644 --- a/arch/sparc64/kernel/ptrace.c +++ b/arch/sparc64/kernel/ptrace.c @@ -124,6 +124,9 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, { BUG_ON(len > PAGE_SIZE); + if (tlb_type == hypervisor) + return; + #ifdef DCACHE_ALIASING_POSSIBLE /* If bit 13 of the kernel address we used to access the * user page is the same as the virtual address that page diff --git a/arch/sparc64/kernel/rtrap.S b/arch/sparc64/kernel/rtrap.S index b80eba0081c..7130e866f93 100644 --- a/arch/sparc64/kernel/rtrap.S +++ b/arch/sparc64/kernel/rtrap.S @@ -223,12 +223,26 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 ldx [%sp + PTREGS_OFF + PT_V9_G3], %g3 ldx [%sp + PTREGS_OFF + PT_V9_G4], %g4 ldx [%sp + PTREGS_OFF + PT_V9_G5], %g5 - mov TSB_REG, %g6 - brnz,a,pn %l3, 1f - ldxa [%g6] ASI_IMMU, %g5 -1: ldx [%sp + PTREGS_OFF + PT_V9_G6], %g6 + brz,pt %l3, 1f + mov %g6, %l2 + + /* Must do this before thread reg is clobbered below. */ + LOAD_PER_CPU_BASE(%g5, %g6, %i0, %i1, %i2) +1: + ldx [%sp + PTREGS_OFF + PT_V9_G6], %g6 ldx [%sp + PTREGS_OFF + PT_V9_G7], %g7 - wrpr %g0, RTRAP_PSTATE_AG_IRQOFF, %pstate + + /* Normal globals are restored, go to trap globals. */ +661: wrpr %g0, RTRAP_PSTATE_AG_IRQOFF, %pstate + nop + .section .sun4v_2insn_patch, "ax" + .word 661b + wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate + SET_GL(1) + .previous + + mov %l2, %g6 + ldx [%sp + PTREGS_OFF + PT_V9_I0], %i0 ldx [%sp + PTREGS_OFF + PT_V9_I1], %i1 @@ -252,27 +266,108 @@ rt_continue: ldx [%sp + PTREGS_OFF + PT_V9_G1], %g1 brnz,pn %l3, kern_rtt mov PRIMARY_CONTEXT, %l7 - ldxa [%l7 + %l7] ASI_DMMU, %l0 + +661: ldxa [%l7 + %l7] ASI_DMMU, %l0 + .section .sun4v_1insn_patch, "ax" + .word 661b + ldxa [%l7 + %l7] ASI_MMU, %l0 + .previous + sethi %hi(sparc64_kern_pri_nuc_bits), %l1 ldx [%l1 + %lo(sparc64_kern_pri_nuc_bits)], %l1 or %l0, %l1, %l0 - stxa %l0, [%l7] ASI_DMMU - flush %g6 + +661: stxa %l0, [%l7] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %l0, [%l7] ASI_MMU + .previous + + sethi %hi(KERNBASE), %l7 + flush %l7 rdpr %wstate, %l1 rdpr %otherwin, %l2 srl %l1, 3, %l1 wrpr %l2, %g0, %canrestore wrpr %l1, %g0, %wstate - wrpr %g0, %g0, %otherwin + brnz,pt %l2, user_rtt_restore + wrpr %g0, %g0, %otherwin + + ldx [%g6 + TI_FLAGS], %g3 + wr %g0, ASI_AIUP, %asi + rdpr %cwp, %g1 + andcc %g3, _TIF_32BIT, %g0 + sub %g1, 1, %g1 + bne,pt %xcc, user_rtt_fill_32bit + wrpr %g1, %cwp + ba,a,pt %xcc, user_rtt_fill_64bit + +user_rtt_fill_fixup: + rdpr %cwp, %g1 + add %g1, 1, %g1 + wrpr %g1, 0x0, %cwp + + rdpr %wstate, %g2 + sll %g2, 3, %g2 + wrpr %g2, 0x0, %wstate + + /* We know %canrestore and %otherwin are both zero. */ + + sethi %hi(sparc64_kern_pri_context), %g2 + ldx [%g2 + %lo(sparc64_kern_pri_context)], %g2 + mov PRIMARY_CONTEXT, %g1 + +661: stxa %g2, [%g1] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g1] ASI_MMU + .previous + + sethi %hi(KERNBASE), %g1 + flush %g1 + + or %g4, FAULT_CODE_WINFIXUP, %g4 + stb %g4, [%g6 + TI_FAULT_CODE] + stx %g5, [%g6 + TI_FAULT_ADDR] + + mov %g6, %l1 + wrpr %g0, 0x0, %tl + +661: nop + .section .sun4v_1insn_patch, "ax" + .word 661b + SET_GL(0) + .previous + + wrpr %g0, RTRAP_PSTATE, %pstate + + mov %l1, %g6 + ldx [%g6 + TI_TASK], %g4 + LOAD_PER_CPU_BASE(%g5, %g6, %g1, %g2, %g3) + call do_sparc64_fault + add %sp, PTREGS_OFF, %o0 + ba,pt %xcc, rtrap + nop + +user_rtt_pre_restore: + add %g1, 1, %g1 + wrpr %g1, 0x0, %cwp + +user_rtt_restore: restore rdpr %canrestore, %g1 wrpr %g1, 0x0, %cleanwin retry nop -kern_rtt: restore +kern_rtt: rdpr %canrestore, %g1 + brz,pn %g1, kern_rtt_fill + nop +kern_rtt_restore: + restore retry + to_kernel: #ifdef CONFIG_PREEMPT ldsw [%g6 + TI_PRE_COUNT], %l5 diff --git a/arch/sparc64/kernel/sbus.c b/arch/sparc64/kernel/sbus.c index d95a1bcf163..1d6ffdeabd4 100644 --- a/arch/sparc64/kernel/sbus.c +++ b/arch/sparc64/kernel/sbus.c @@ -693,11 +693,11 @@ void sbus_set_sbus64(struct sbus_dev *sdev, int bursts) /* SBUS SYSIO INO number to Sparc PIL level. */ static unsigned char sysio_ino_to_pil[] = { - 0, 4, 4, 7, 5, 7, 8, 9, /* SBUS slot 0 */ - 0, 4, 4, 7, 5, 7, 8, 9, /* SBUS slot 1 */ - 0, 4, 4, 7, 5, 7, 8, 9, /* SBUS slot 2 */ - 0, 4, 4, 7, 5, 7, 8, 9, /* SBUS slot 3 */ - 4, /* Onboard SCSI */ + 0, 5, 5, 7, 5, 7, 8, 9, /* SBUS slot 0 */ + 0, 5, 5, 7, 5, 7, 8, 9, /* SBUS slot 1 */ + 0, 5, 5, 7, 5, 7, 8, 9, /* SBUS slot 2 */ + 0, 5, 5, 7, 5, 7, 8, 9, /* SBUS slot 3 */ + 5, /* Onboard SCSI */ 5, /* Onboard Ethernet */ /*XXX*/ 8, /* Onboard BPP */ 0, /* Bogon */ diff --git a/arch/sparc64/kernel/setup.c b/arch/sparc64/kernel/setup.c index 158bd31e15b..7d0e67c1ce5 100644 --- a/arch/sparc64/kernel/setup.c +++ b/arch/sparc64/kernel/setup.c @@ -64,12 +64,6 @@ struct screen_info screen_info = { 16 /* orig-video-points */ }; -/* Typing sync at the prom prompt calls the function pointed to by - * the sync callback which I set to the following function. - * This should sync all filesystems and return, for now it just - * prints out pretty messages and returns. - */ - void (*prom_palette)(int); void (*prom_keyboard)(void); @@ -79,259 +73,6 @@ prom_console_write(struct console *con, const char *s, unsigned n) prom_write(s, n); } -static struct console prom_console = { - .name = "prom", - .write = prom_console_write, - .flags = CON_CONSDEV | CON_ENABLED, - .index = -1, -}; - -#define PROM_TRUE -1 -#define PROM_FALSE 0 - -/* Pretty sick eh? */ -int prom_callback(long *args) -{ - struct console *cons, *saved_console = NULL; - unsigned long flags; - char *cmd; - extern spinlock_t prom_entry_lock; - - if (!args) - return -1; - if (!(cmd = (char *)args[0])) - return -1; - - /* - * The callback can be invoked on the cpu that first dropped - * into prom_cmdline after taking the serial interrupt, or on - * a slave processor that was smp_captured() if the - * administrator has done a switch-cpu inside obp. In either - * case, the cpu is marked as in-interrupt. Drop IRQ locks. - */ - irq_exit(); - - /* XXX Revisit the locking here someday. This is a debugging - * XXX feature so it isnt all that critical. -DaveM - */ - local_irq_save(flags); - - spin_unlock(&prom_entry_lock); - cons = console_drivers; - while (cons) { - unregister_console(cons); - cons->flags &= ~(CON_PRINTBUFFER); - cons->next = saved_console; - saved_console = cons; - cons = console_drivers; - } - register_console(&prom_console); - if (!strcmp(cmd, "sync")) { - prom_printf("PROM `%s' command...\n", cmd); - show_free_areas(); - if (current->pid != 0) { - local_irq_enable(); - sys_sync(); - local_irq_disable(); - } - args[2] = 0; - args[args[1] + 3] = -1; - prom_printf("Returning to PROM\n"); - } else if (!strcmp(cmd, "va>tte-data")) { - unsigned long ctx, va; - unsigned long tte = 0; - long res = PROM_FALSE; - - ctx = args[3]; - va = args[4]; - if (ctx) { - /* - * Find process owning ctx, lookup mapping. - */ - struct task_struct *p; - struct mm_struct *mm = NULL; - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep; - pte_t pte; - - for_each_process(p) { - mm = p->mm; - if (CTX_NRBITS(mm->context) == ctx) - break; - } - if (!mm || - CTX_NRBITS(mm->context) != ctx) - goto done; - - pgdp = pgd_offset(mm, va); - if (pgd_none(*pgdp)) - goto done; - pudp = pud_offset(pgdp, va); - if (pud_none(*pudp)) - goto done; - pmdp = pmd_offset(pudp, va); - if (pmd_none(*pmdp)) - goto done; - - /* Preemption implicitly disabled by virtue of - * being called from inside OBP. - */ - ptep = pte_offset_map(pmdp, va); - pte = *ptep; - if (pte_present(pte)) { - tte = pte_val(pte); - res = PROM_TRUE; - } - pte_unmap(ptep); - goto done; - } - - if ((va >= KERNBASE) && (va < (KERNBASE + (4 * 1024 * 1024)))) { - extern unsigned long sparc64_kern_pri_context; - - /* Spitfire Errata #32 workaround */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (sparc64_kern_pri_context), - "r" (PRIMARY_CONTEXT), - "i" (ASI_DMMU)); - - /* - * Locked down tlb entry. - */ - - if (tlb_type == spitfire) - tte = spitfire_get_dtlb_data(SPITFIRE_HIGHEST_LOCKED_TLBENT); - else if (tlb_type == cheetah || tlb_type == cheetah_plus) - tte = cheetah_get_ldtlb_data(CHEETAH_HIGHEST_LOCKED_TLBENT); - - res = PROM_TRUE; - goto done; - } - - if (va < PGDIR_SIZE) { - /* - * vmalloc or prom_inherited mapping. - */ - pgd_t *pgdp; - pud_t *pudp; - pmd_t *pmdp; - pte_t *ptep; - pte_t pte; - int error; - - if ((va >= LOW_OBP_ADDRESS) && (va < HI_OBP_ADDRESS)) { - tte = prom_virt_to_phys(va, &error); - if (!error) - res = PROM_TRUE; - goto done; - } - pgdp = pgd_offset_k(va); - if (pgd_none(*pgdp)) - goto done; - pudp = pud_offset(pgdp, va); - if (pud_none(*pudp)) - goto done; - pmdp = pmd_offset(pudp, va); - if (pmd_none(*pmdp)) - goto done; - - /* Preemption implicitly disabled by virtue of - * being called from inside OBP. - */ - ptep = pte_offset_kernel(pmdp, va); - pte = *ptep; - if (pte_present(pte)) { - tte = pte_val(pte); - res = PROM_TRUE; - } - goto done; - } - - if (va < PAGE_OFFSET) { - /* - * No mappings here. - */ - goto done; - } - - if (va & (1UL << 40)) { - /* - * I/O page. - */ - - tte = (__pa(va) & _PAGE_PADDR) | - _PAGE_VALID | _PAGE_SZ4MB | - _PAGE_E | _PAGE_P | _PAGE_W; - res = PROM_TRUE; - goto done; - } - - /* - * Normal page. - */ - tte = (__pa(va) & _PAGE_PADDR) | - _PAGE_VALID | _PAGE_SZ4MB | - _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W; - res = PROM_TRUE; - - done: - if (res == PROM_TRUE) { - args[2] = 3; - args[args[1] + 3] = 0; - args[args[1] + 4] = res; - args[args[1] + 5] = tte; - } else { - args[2] = 2; - args[args[1] + 3] = 0; - args[args[1] + 4] = res; - } - } else if (!strcmp(cmd, ".soft1")) { - unsigned long tte; - - tte = args[3]; - prom_printf("%lx:\"%s%s%s%s%s\" ", - (tte & _PAGE_SOFT) >> 7, - tte & _PAGE_MODIFIED ? "M" : "-", - tte & _PAGE_ACCESSED ? "A" : "-", - tte & _PAGE_READ ? "W" : "-", - tte & _PAGE_WRITE ? "R" : "-", - tte & _PAGE_PRESENT ? "P" : "-"); - - args[2] = 2; - args[args[1] + 3] = 0; - args[args[1] + 4] = PROM_TRUE; - } else if (!strcmp(cmd, ".soft2")) { - unsigned long tte; - - tte = args[3]; - prom_printf("%lx ", (tte & 0x07FC000000000000UL) >> 50); - - args[2] = 2; - args[args[1] + 3] = 0; - args[args[1] + 4] = PROM_TRUE; - } else { - prom_printf("unknown PROM `%s' command...\n", cmd); - } - unregister_console(&prom_console); - while (saved_console) { - cons = saved_console; - saved_console = cons->next; - register_console(cons); - } - spin_lock(&prom_entry_lock); - local_irq_restore(flags); - - /* - * Restore in-interrupt status for a resume from obp. - */ - irq_enter(); - return 0; -} - unsigned int boot_flags = 0; #define BOOTME_DEBUG 0x1 #define BOOTME_SINGLE 0x2 @@ -479,15 +220,99 @@ char reboot_command[COMMAND_LINE_SIZE]; static struct pt_regs fake_swapper_regs = { { 0, }, 0, 0, 0, 0 }; -void register_prom_callbacks(void) +static void __init per_cpu_patch(void) { - prom_setcallback(prom_callback); - prom_feval(": linux-va>tte-data 2 \" va>tte-data\" $callback drop ; " - "' linux-va>tte-data to va>tte-data"); - prom_feval(": linux-.soft1 1 \" .soft1\" $callback 2drop ; " - "' linux-.soft1 to .soft1"); - prom_feval(": linux-.soft2 1 \" .soft2\" $callback 2drop ; " - "' linux-.soft2 to .soft2"); + struct cpuid_patch_entry *p; + unsigned long ver; + int is_jbus; + + if (tlb_type == spitfire && !this_is_starfire) + return; + + is_jbus = 0; + if (tlb_type != hypervisor) { + __asm__ ("rdpr %%ver, %0" : "=r" (ver)); + is_jbus = ((ver >> 32UL) == __JALAPENO_ID || + (ver >> 32UL) == __SERRANO_ID); + } + + p = &__cpuid_patch; + while (p < &__cpuid_patch_end) { + unsigned long addr = p->addr; + unsigned int *insns; + + switch (tlb_type) { + case spitfire: + insns = &p->starfire[0]; + break; + case cheetah: + case cheetah_plus: + if (is_jbus) + insns = &p->cheetah_jbus[0]; + else + insns = &p->cheetah_safari[0]; + break; + case hypervisor: + insns = &p->sun4v[0]; + break; + default: + prom_printf("Unknown cpu type, halting.\n"); + prom_halt(); + }; + + *(unsigned int *) (addr + 0) = insns[0]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 0)); + + *(unsigned int *) (addr + 4) = insns[1]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 4)); + + *(unsigned int *) (addr + 8) = insns[2]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 8)); + + *(unsigned int *) (addr + 12) = insns[3]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 12)); + + p++; + } +} + +static void __init sun4v_patch(void) +{ + struct sun4v_1insn_patch_entry *p1; + struct sun4v_2insn_patch_entry *p2; + + if (tlb_type != hypervisor) + return; + + p1 = &__sun4v_1insn_patch; + while (p1 < &__sun4v_1insn_patch_end) { + unsigned long addr = p1->addr; + + *(unsigned int *) (addr + 0) = p1->insn; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 0)); + + p1++; + } + + p2 = &__sun4v_2insn_patch; + while (p2 < &__sun4v_2insn_patch_end) { + unsigned long addr = p2->addr; + + *(unsigned int *) (addr + 0) = p2->insns[0]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 0)); + + *(unsigned int *) (addr + 4) = p2->insns[1]; + wmb(); + __asm__ __volatile__("flush %0" : : "r" (addr + 4)); + + p2++; + } } void __init setup_arch(char **cmdline_p) @@ -496,7 +321,10 @@ void __init setup_arch(char **cmdline_p) *cmdline_p = prom_getbootargs(); strcpy(saved_command_line, *cmdline_p); - printk("ARCH: SUN4U\n"); + if (tlb_type == hypervisor) + printk("ARCH: SUN4V\n"); + else + printk("ARCH: SUN4U\n"); #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -507,6 +335,13 @@ void __init setup_arch(char **cmdline_p) /* Work out if we are starfire early on */ check_if_starfire(); + /* Now we know enough to patch the get_cpuid sequences + * used by trap code. + */ + per_cpu_patch(); + + sun4v_patch(); + boot_flags_init(*cmdline_p); idprom_init(); @@ -514,7 +349,7 @@ void __init setup_arch(char **cmdline_p) if (!root_flags) root_mountflags &= ~MS_RDONLY; ROOT_DEV = old_decode_dev(root_dev); -#ifdef CONFIG_BLK_DEV_INITRD +#ifdef CONFIG_BLK_DEV_RAM rd_image_start = ram_flags & RAMDISK_IMAGE_START_MASK; rd_prompt = ((ram_flags & RAMDISK_PROMPT_FLAG) != 0); rd_doload = ((ram_flags & RAMDISK_LOAD_FLAG) != 0); @@ -544,6 +379,9 @@ void __init setup_arch(char **cmdline_p) smp_setup_cpu_possible_map(); + /* Get boot processor trap_block[] setup. */ + init_cur_cpu_trap(current_thread_info()); + paging_init(); } @@ -565,6 +403,12 @@ static int __init set_preferred_console(void) serial_console = 2; } else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) { serial_console = 3; + } else if (idev == PROMDEV_IVCONS && odev == PROMDEV_OVCONS) { + /* sunhv_console_init() doesn't check the serial_console + * value anyways... + */ + serial_console = 4; + return add_preferred_console("ttyHV", 0, NULL); } else { prom_printf("Inconsistent console: " "input %d, output %d\n", @@ -598,9 +442,8 @@ static int show_cpuinfo(struct seq_file *m, void *__unused) seq_printf(m, "cpu\t\t: %s\n" "fpu\t\t: %s\n" - "promlib\t\t: Version 3 Revision %d\n" - "prom\t\t: %d.%d.%d\n" - "type\t\t: sun4u\n" + "prom\t\t: %s\n" + "type\t\t: %s\n" "ncpus probed\t: %d\n" "ncpus active\t: %d\n" "D$ parity tl1\t: %u\n" @@ -612,10 +455,10 @@ static int show_cpuinfo(struct seq_file *m, void *__unused) , sparc_cpu_type, sparc_fpu_type, - prom_rev, - prom_prev >> 16, - (prom_prev >> 8) & 0xff, - prom_prev & 0xff, + prom_version, + ((tlb_type == hypervisor) ? + "sun4v" : + "sun4u"), ncpus_probed, num_online_cpus(), dcache_parity_tl1_occurred, @@ -692,15 +535,11 @@ static int __init topology_init(void) while (!cpu_find_by_instance(ncpus_probed, NULL, NULL)) ncpus_probed++; - for (i = 0; i < NR_CPUS; i++) { - if (cpu_possible(i)) { - struct cpu *p = kmalloc(sizeof(*p), GFP_KERNEL); - - if (p) { - memset(p, 0, sizeof(*p)); - register_cpu(p, i, NULL); - err = 0; - } + for_each_cpu(i) { + struct cpu *p = kzalloc(sizeof(*p), GFP_KERNEL); + if (p) { + register_cpu(p, i, NULL); + err = 0; } } diff --git a/arch/sparc64/kernel/smp.c b/arch/sparc64/kernel/smp.c index 1f7ad8a6905..7dc28a48426 100644 --- a/arch/sparc64/kernel/smp.c +++ b/arch/sparc64/kernel/smp.c @@ -38,6 +38,7 @@ #include <asm/timer.h> #include <asm/starfire.h> #include <asm/tlb.h> +#include <asm/sections.h> extern void calibrate_delay(void); @@ -46,6 +47,8 @@ static unsigned char boot_cpu_id; cpumask_t cpu_online_map __read_mostly = CPU_MASK_NONE; cpumask_t phys_cpu_present_map __read_mostly = CPU_MASK_NONE; +cpumask_t cpu_sibling_map[NR_CPUS] __read_mostly = + { [0 ... NR_CPUS-1] = CPU_MASK_NONE }; static cpumask_t smp_commenced_mask; static cpumask_t cpu_callout_map; @@ -54,30 +57,26 @@ void smp_info(struct seq_file *m) int i; seq_printf(m, "State:\n"); - for (i = 0; i < NR_CPUS; i++) { - if (cpu_online(i)) - seq_printf(m, - "CPU%d:\t\tonline\n", i); - } + for_each_online_cpu(i) + seq_printf(m, "CPU%d:\t\tonline\n", i); } void smp_bogo(struct seq_file *m) { int i; - for (i = 0; i < NR_CPUS; i++) - if (cpu_online(i)) - seq_printf(m, - "Cpu%dBogo\t: %lu.%02lu\n" - "Cpu%dClkTck\t: %016lx\n", - i, cpu_data(i).udelay_val / (500000/HZ), - (cpu_data(i).udelay_val / (5000/HZ)) % 100, - i, cpu_data(i).clock_tick); + for_each_online_cpu(i) + seq_printf(m, + "Cpu%dBogo\t: %lu.%02lu\n" + "Cpu%dClkTck\t: %016lx\n", + i, cpu_data(i).udelay_val / (500000/HZ), + (cpu_data(i).udelay_val / (5000/HZ)) % 100, + i, cpu_data(i).clock_tick); } void __init smp_store_cpu_info(int id) { - int cpu_node; + int cpu_node, def; /* multiplier and counter set by smp_setup_percpu_timer() */ @@ -87,24 +86,32 @@ void __init smp_store_cpu_info(int id) cpu_data(id).clock_tick = prom_getintdefault(cpu_node, "clock-frequency", 0); - cpu_data(id).pgcache_size = 0; - cpu_data(id).pte_cache[0] = NULL; - cpu_data(id).pte_cache[1] = NULL; - cpu_data(id).pgd_cache = NULL; - cpu_data(id).idle_volume = 1; - + def = ((tlb_type == hypervisor) ? (8 * 1024) : (16 * 1024)); cpu_data(id).dcache_size = prom_getintdefault(cpu_node, "dcache-size", - 16 * 1024); + def); + + def = 32; cpu_data(id).dcache_line_size = - prom_getintdefault(cpu_node, "dcache-line-size", 32); + prom_getintdefault(cpu_node, "dcache-line-size", def); + + def = 16 * 1024; cpu_data(id).icache_size = prom_getintdefault(cpu_node, "icache-size", - 16 * 1024); + def); + + def = 32; cpu_data(id).icache_line_size = - prom_getintdefault(cpu_node, "icache-line-size", 32); + prom_getintdefault(cpu_node, "icache-line-size", def); + + def = ((tlb_type == hypervisor) ? + (3 * 1024 * 1024) : + (4 * 1024 * 1024)); cpu_data(id).ecache_size = prom_getintdefault(cpu_node, "ecache-size", - 4 * 1024 * 1024); + def); + + def = 64; cpu_data(id).ecache_line_size = - prom_getintdefault(cpu_node, "ecache-line-size", 64); + prom_getintdefault(cpu_node, "ecache-line-size", def); + printk("CPU[%d]: Caches " "D[sz(%d):line_sz(%d)] " "I[sz(%d):line_sz(%d)] " @@ -119,27 +126,16 @@ static void smp_setup_percpu_timer(void); static volatile unsigned long callin_flag = 0; -extern void inherit_locked_prom_mappings(int save_p); - -static inline void cpu_setup_percpu_base(unsigned long cpu_id) -{ - __asm__ __volatile__("mov %0, %%g5\n\t" - "stxa %0, [%1] %2\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (__per_cpu_offset(cpu_id)), - "r" (TSB_REG), "i" (ASI_IMMU)); -} - void __init smp_callin(void) { int cpuid = hard_smp_processor_id(); - inherit_locked_prom_mappings(0); + __local_per_cpu_offset = __per_cpu_offset(cpuid); - __flush_tlb_all(); + if (tlb_type == hypervisor) + sun4v_ktsb_register(); - cpu_setup_percpu_base(cpuid); + __flush_tlb_all(); smp_setup_percpu_timer(); @@ -316,6 +312,8 @@ static void smp_synchronize_one_tick(int cpu) spin_unlock_irqrestore(&itc_sync_lock, flags); } +extern void sun4v_init_mondo_queues(int use_bootmem, int cpu, int alloc, int load); + extern unsigned long sparc64_cpu_startup; /* The OBP cpu startup callback truncates the 3rd arg cookie to @@ -331,21 +329,31 @@ static int __devinit smp_boot_one_cpu(unsigned int cpu) unsigned long cookie = (unsigned long)(&cpu_new_thread); struct task_struct *p; - int timeout, ret, cpu_node; + int timeout, ret; p = fork_idle(cpu); callin_flag = 0; cpu_new_thread = task_thread_info(p); cpu_set(cpu, cpu_callout_map); - cpu_find_by_mid(cpu, &cpu_node); - prom_startcpu(cpu_node, entry, cookie); + if (tlb_type == hypervisor) { + /* Alloc the mondo queues, cpu will load them. */ + sun4v_init_mondo_queues(0, cpu, 1, 0); + + prom_startcpu_cpuid(cpu, entry, cookie); + } else { + int cpu_node; + + cpu_find_by_mid(cpu, &cpu_node); + prom_startcpu(cpu_node, entry, cookie); + } for (timeout = 0; timeout < 5000000; timeout++) { if (callin_flag) break; udelay(100); } + if (callin_flag) { ret = 0; } else { @@ -441,7 +449,7 @@ static __inline__ void spitfire_xcall_deliver(u64 data0, u64 data1, u64 data2, c static void cheetah_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask) { u64 pstate, ver; - int nack_busy_id, is_jalapeno; + int nack_busy_id, is_jbus; if (cpus_empty(mask)) return; @@ -451,7 +459,8 @@ static void cheetah_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mas * derivative processor. */ __asm__ ("rdpr %%ver, %0" : "=r" (ver)); - is_jalapeno = ((ver >> 32) == 0x003e0016); + is_jbus = ((ver >> 32) == __JALAPENO_ID || + (ver >> 32) == __SERRANO_ID); __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate)); @@ -476,7 +485,7 @@ retry: for_each_cpu_mask(i, mask) { u64 target = (i << 14) | 0x70; - if (!is_jalapeno) + if (!is_jbus) target |= (nack_busy_id << 24); __asm__ __volatile__( "stxa %%g0, [%0] %1\n\t" @@ -529,7 +538,7 @@ retry: for_each_cpu_mask(i, mask) { u64 check_mask; - if (is_jalapeno) + if (is_jbus) check_mask = (0x2UL << (2*i)); else check_mask = (0x2UL << @@ -544,6 +553,155 @@ retry: } } +/* Multi-cpu list version. */ +static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t mask) +{ + struct trap_per_cpu *tb; + u16 *cpu_list; + u64 *mondo; + cpumask_t error_mask; + unsigned long flags, status; + int cnt, retries, this_cpu, prev_sent, i; + + /* We have to do this whole thing with interrupts fully disabled. + * Otherwise if we send an xcall from interrupt context it will + * corrupt both our mondo block and cpu list state. + * + * One consequence of this is that we cannot use timeout mechanisms + * that depend upon interrupts being delivered locally. So, for + * example, we cannot sample jiffies and expect it to advance. + * + * Fortunately, udelay() uses %stick/%tick so we can use that. + */ + local_irq_save(flags); + + this_cpu = smp_processor_id(); + tb = &trap_block[this_cpu]; + + mondo = __va(tb->cpu_mondo_block_pa); + mondo[0] = data0; + mondo[1] = data1; + mondo[2] = data2; + wmb(); + + cpu_list = __va(tb->cpu_list_pa); + + /* Setup the initial cpu list. */ + cnt = 0; + for_each_cpu_mask(i, mask) + cpu_list[cnt++] = i; + + cpus_clear(error_mask); + retries = 0; + prev_sent = 0; + do { + int forward_progress, n_sent; + + status = sun4v_cpu_mondo_send(cnt, + tb->cpu_list_pa, + tb->cpu_mondo_block_pa); + + /* HV_EOK means all cpus received the xcall, we're done. */ + if (likely(status == HV_EOK)) + break; + + /* First, see if we made any forward progress. + * + * The hypervisor indicates successful sends by setting + * cpu list entries to the value 0xffff. + */ + n_sent = 0; + for (i = 0; i < cnt; i++) { + if (likely(cpu_list[i] == 0xffff)) + n_sent++; + } + + forward_progress = 0; + if (n_sent > prev_sent) + forward_progress = 1; + + prev_sent = n_sent; + + /* If we get a HV_ECPUERROR, then one or more of the cpus + * in the list are in error state. Use the cpu_state() + * hypervisor call to find out which cpus are in error state. + */ + if (unlikely(status == HV_ECPUERROR)) { + for (i = 0; i < cnt; i++) { + long err; + u16 cpu; + + cpu = cpu_list[i]; + if (cpu == 0xffff) + continue; + + err = sun4v_cpu_state(cpu); + if (err >= 0 && + err == HV_CPU_STATE_ERROR) { + cpu_list[i] = 0xffff; + cpu_set(cpu, error_mask); + } + } + } else if (unlikely(status != HV_EWOULDBLOCK)) + goto fatal_mondo_error; + + /* Don't bother rewriting the CPU list, just leave the + * 0xffff and non-0xffff entries in there and the + * hypervisor will do the right thing. + * + * Only advance timeout state if we didn't make any + * forward progress. + */ + if (unlikely(!forward_progress)) { + if (unlikely(++retries > 10000)) + goto fatal_mondo_timeout; + + /* Delay a little bit to let other cpus catch up + * on their cpu mondo queue work. + */ + udelay(2 * cnt); + } + } while (1); + + local_irq_restore(flags); + + if (unlikely(!cpus_empty(error_mask))) + goto fatal_mondo_cpu_error; + + return; + +fatal_mondo_cpu_error: + printk(KERN_CRIT "CPU[%d]: SUN4V mondo cpu error, some target cpus " + "were in error state\n", + this_cpu); + printk(KERN_CRIT "CPU[%d]: Error mask [ ", this_cpu); + for_each_cpu_mask(i, error_mask) + printk("%d ", i); + printk("]\n"); + return; + +fatal_mondo_timeout: + local_irq_restore(flags); + printk(KERN_CRIT "CPU[%d]: SUN4V mondo timeout, no forward " + " progress after %d retries.\n", + this_cpu, retries); + goto dump_cpu_list_and_out; + +fatal_mondo_error: + local_irq_restore(flags); + printk(KERN_CRIT "CPU[%d]: Unexpected SUN4V mondo error %lu\n", + this_cpu, status); + printk(KERN_CRIT "CPU[%d]: Args were cnt(%d) cpulist_pa(%lx) " + "mondo_block_pa(%lx)\n", + this_cpu, cnt, tb->cpu_list_pa, tb->cpu_mondo_block_pa); + +dump_cpu_list_and_out: + printk(KERN_CRIT "CPU[%d]: CPU list [ ", this_cpu); + for (i = 0; i < cnt; i++) + printk("%u ", cpu_list[i]); + printk("]\n"); +} + /* Send cross call to all processors mentioned in MASK * except self. */ @@ -557,8 +715,10 @@ static void smp_cross_call_masked(unsigned long *func, u32 ctx, u64 data1, u64 d if (tlb_type == spitfire) spitfire_xcall_deliver(data0, data1, data2, mask); - else + else if (tlb_type == cheetah || tlb_type == cheetah_plus) cheetah_xcall_deliver(data0, data1, data2, mask); + else + hypervisor_xcall_deliver(data0, data1, data2, mask); /* NOTE: Caller runs local copy on master. */ put_cpu(); @@ -594,16 +754,13 @@ extern unsigned long xcall_call_function; * You must not call this function with disabled interrupts or from a * hardware interrupt handler or from a bottom half handler. */ -int smp_call_function(void (*func)(void *info), void *info, - int nonatomic, int wait) +static int smp_call_function_mask(void (*func)(void *info), void *info, + int nonatomic, int wait, cpumask_t mask) { struct call_data_struct data; - int cpus = num_online_cpus() - 1; + int cpus; long timeout; - if (!cpus) - return 0; - /* Can deadlock when called with interrupts disabled */ WARN_ON(irqs_disabled()); @@ -614,9 +771,14 @@ int smp_call_function(void (*func)(void *info), void *info, spin_lock(&call_lock); + cpu_clear(smp_processor_id(), mask); + cpus = cpus_weight(mask); + if (!cpus) + goto out_unlock; + call_data = &data; - smp_cross_call(&xcall_call_function, 0, 0, 0); + smp_cross_call_masked(&xcall_call_function, 0, 0, 0, mask); /* * Wait for other cpus to complete function or at @@ -630,18 +792,25 @@ int smp_call_function(void (*func)(void *info), void *info, udelay(1); } +out_unlock: spin_unlock(&call_lock); return 0; out_timeout: spin_unlock(&call_lock); - printk("XCALL: Remote cpus not responding, ncpus=%ld finished=%ld\n", - (long) num_online_cpus() - 1L, - (long) atomic_read(&data.finished)); + printk("XCALL: Remote cpus not responding, ncpus=%d finished=%d\n", + cpus, atomic_read(&data.finished)); return 0; } +int smp_call_function(void (*func)(void *info), void *info, + int nonatomic, int wait) +{ + return smp_call_function_mask(func, info, nonatomic, wait, + cpu_online_map); +} + void smp_call_function_client(int irq, struct pt_regs *regs) { void (*func) (void *info) = call_data->func; @@ -659,13 +828,25 @@ void smp_call_function_client(int irq, struct pt_regs *regs) } } +static void tsb_sync(void *info) +{ + struct mm_struct *mm = info; + + if (current->active_mm == mm) + tsb_context_switch(mm); +} + +void smp_tsb_sync(struct mm_struct *mm) +{ + smp_call_function_mask(tsb_sync, mm, 0, 1, mm->cpu_vm_mask); +} + extern unsigned long xcall_flush_tlb_mm; extern unsigned long xcall_flush_tlb_pending; extern unsigned long xcall_flush_tlb_kernel_range; -extern unsigned long xcall_flush_tlb_all_spitfire; -extern unsigned long xcall_flush_tlb_all_cheetah; extern unsigned long xcall_report_regs; extern unsigned long xcall_receive_signal; +extern unsigned long xcall_new_mmu_context_version; #ifdef DCACHE_ALIASING_POSSIBLE extern unsigned long xcall_flush_dcache_page_cheetah; @@ -693,11 +874,17 @@ static __inline__ void __local_flush_dcache_page(struct page *page) void smp_flush_dcache_page_impl(struct page *page, int cpu) { cpumask_t mask = cpumask_of_cpu(cpu); - int this_cpu = get_cpu(); + int this_cpu; + + if (tlb_type == hypervisor) + return; #ifdef CONFIG_DEBUG_DCFLUSH atomic_inc(&dcpage_flushes); #endif + + this_cpu = get_cpu(); + if (cpu == this_cpu) { __local_flush_dcache_page(page); } else if (cpu_online(cpu)) { @@ -713,7 +900,7 @@ void smp_flush_dcache_page_impl(struct page *page, int cpu) __pa(pg_addr), (u64) pg_addr, mask); - } else { + } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { #ifdef DCACHE_ALIASING_POSSIBLE data0 = ((u64)&xcall_flush_dcache_page_cheetah); @@ -735,7 +922,12 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page) void *pg_addr = page_address(page); cpumask_t mask = cpu_online_map; u64 data0; - int this_cpu = get_cpu(); + int this_cpu; + + if (tlb_type == hypervisor) + return; + + this_cpu = get_cpu(); cpu_clear(this_cpu, mask); @@ -752,7 +944,7 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page) __pa(pg_addr), (u64) pg_addr, mask); - } else { + } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { #ifdef DCACHE_ALIASING_POSSIBLE data0 = ((u64)&xcall_flush_dcache_page_cheetah); cheetah_xcall_deliver(data0, @@ -769,38 +961,58 @@ void flush_dcache_page_all(struct mm_struct *mm, struct page *page) put_cpu(); } +static void __smp_receive_signal_mask(cpumask_t mask) +{ + smp_cross_call_masked(&xcall_receive_signal, 0, 0, 0, mask); +} + void smp_receive_signal(int cpu) { cpumask_t mask = cpumask_of_cpu(cpu); - if (cpu_online(cpu)) { - u64 data0 = (((u64)&xcall_receive_signal) & 0xffffffff); - - if (tlb_type == spitfire) - spitfire_xcall_deliver(data0, 0, 0, mask); - else - cheetah_xcall_deliver(data0, 0, 0, mask); - } + if (cpu_online(cpu)) + __smp_receive_signal_mask(mask); } void smp_receive_signal_client(int irq, struct pt_regs *regs) { - /* Just return, rtrap takes care of the rest. */ clear_softint(1 << irq); } -void smp_report_regs(void) +void smp_new_mmu_context_version_client(int irq, struct pt_regs *regs) { - smp_cross_call(&xcall_report_regs, 0, 0, 0); + struct mm_struct *mm; + unsigned long flags; + + clear_softint(1 << irq); + + /* See if we need to allocate a new TLB context because + * the version of the one we are using is now out of date. + */ + mm = current->active_mm; + if (unlikely(!mm || (mm == &init_mm))) + return; + + spin_lock_irqsave(&mm->context.lock, flags); + + if (unlikely(!CTX_VALID(mm->context))) + get_new_mmu_context(mm); + + spin_unlock_irqrestore(&mm->context.lock, flags); + + load_secondary_context(mm); + __flush_tlb_mm(CTX_HWBITS(mm->context), + SECONDARY_CONTEXT); } -void smp_flush_tlb_all(void) +void smp_new_mmu_context_version(void) { - if (tlb_type == spitfire) - smp_cross_call(&xcall_flush_tlb_all_spitfire, 0, 0, 0); - else - smp_cross_call(&xcall_flush_tlb_all_cheetah, 0, 0, 0); - __flush_tlb_all(); + smp_cross_call(&xcall_new_mmu_context_version, 0, 0, 0); +} + +void smp_report_regs(void) +{ + smp_cross_call(&xcall_report_regs, 0, 0, 0); } /* We know that the window frames of the user have been flushed @@ -944,24 +1156,19 @@ void smp_release(void) * can service tlb flush xcalls... */ extern void prom_world(int); -extern void save_alternate_globals(unsigned long *); -extern void restore_alternate_globals(unsigned long *); + void smp_penguin_jailcell(int irq, struct pt_regs *regs) { - unsigned long global_save[24]; - clear_softint(1 << irq); preempt_disable(); __asm__ __volatile__("flushw"); - save_alternate_globals(global_save); prom_world(1); atomic_inc(&smp_capture_registry); membar_storeload_storestore(); while (penguins_are_doing_time) rmb(); - restore_alternate_globals(global_save); atomic_dec(&smp_capture_registry); prom_world(0); @@ -1071,7 +1278,7 @@ int setup_profiling_timer(unsigned int multiplier) return -EINVAL; spin_lock_irqsave(&prof_setup_lock, flags); - for (i = 0; i < NR_CPUS; i++) + for_each_cpu(i) prof_multiplier(i) = multiplier; current_tick_offset = (timer_tick_offset / multiplier); spin_unlock_irqrestore(&prof_setup_lock, flags); @@ -1082,6 +1289,8 @@ int setup_profiling_timer(unsigned int multiplier) /* Constrain the number of cpus to max_cpus. */ void __init smp_prepare_cpus(unsigned int max_cpus) { + int i; + if (num_possible_cpus() > max_cpus) { int instance, mid; @@ -1089,6 +1298,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus) while (!cpu_find_by_instance(instance, NULL, &mid)) { if (mid != boot_cpu_id) { cpu_clear(mid, phys_cpu_present_map); + cpu_clear(mid, cpu_present_map); if (num_possible_cpus() <= max_cpus) break; } @@ -1096,6 +1306,20 @@ void __init smp_prepare_cpus(unsigned int max_cpus) } } + for_each_cpu(i) { + if (tlb_type == hypervisor) { + int j; + + /* XXX get this mapping from machine description */ + for_each_cpu(j) { + if ((j >> 2) == (i >> 2)) + cpu_set(j, cpu_sibling_map[i]); + } + } else { + cpu_set(i, cpu_sibling_map[i]); + } + } + smp_store_cpu_info(boot_cpu_id); } @@ -1109,20 +1333,25 @@ void __init smp_setup_cpu_possible_map(void) instance = 0; while (!cpu_find_by_instance(instance, NULL, &mid)) { - if (mid < NR_CPUS) + if (mid < NR_CPUS) { cpu_set(mid, phys_cpu_present_map); + cpu_set(mid, cpu_present_map); + } instance++; } } void __devinit smp_prepare_boot_cpu(void) { - if (hard_smp_processor_id() >= NR_CPUS) { + int cpu = hard_smp_processor_id(); + + if (cpu >= NR_CPUS) { prom_printf("Serious problem, boot cpu id >= NR_CPUS\n"); prom_halt(); } - current_thread_info()->cpu = hard_smp_processor_id(); + current_thread_info()->cpu = cpu; + __local_per_cpu_offset = __per_cpu_offset(cpu); cpu_set(smp_processor_id(), cpu_online_map); cpu_set(smp_processor_id(), phys_cpu_present_map); @@ -1139,7 +1368,11 @@ int __devinit __cpu_up(unsigned int cpu) if (!cpu_isset(cpu, cpu_online_map)) { ret = -ENODEV; } else { - smp_synchronize_one_tick(cpu); + /* On SUN4V, writes to %tick and %stick are + * not allowed. + */ + if (tlb_type != hypervisor) + smp_synchronize_one_tick(cpu); } } return ret; @@ -1150,10 +1383,8 @@ void __init smp_cpus_done(unsigned int max_cpus) unsigned long bogosum = 0; int i; - for (i = 0; i < NR_CPUS; i++) { - if (cpu_online(i)) - bogosum += cpu_data(i).udelay_val; - } + for_each_online_cpu(i) + bogosum += cpu_data(i).udelay_val; printk("Total of %ld processors activated " "(%lu.%02lu BogoMIPS).\n", (long) num_online_cpus(), @@ -1183,12 +1414,9 @@ void __init setup_per_cpu_areas(void) { unsigned long goal, size, i; char *ptr; - /* Created by linker magic */ - extern char __per_cpu_start[], __per_cpu_end[]; /* Copy section for each CPU (we discard the original) */ - goal = ALIGN(__per_cpu_end - __per_cpu_start, PAGE_SIZE); - + goal = ALIGN(__per_cpu_end - __per_cpu_start, SMP_CACHE_BYTES); #ifdef CONFIG_MODULES if (goal < PERCPU_ENOUGH_ROOM) goal = PERCPU_ENOUGH_ROOM; @@ -1197,31 +1425,10 @@ void __init setup_per_cpu_areas(void) for (size = 1UL; size < goal; size <<= 1UL) __per_cpu_shift++; - /* Make sure the resulting __per_cpu_base value - * will fit in the 43-bit sign extended IMMU - * TSB register. - */ - ptr = __alloc_bootmem(size * NR_CPUS, PAGE_SIZE, - (unsigned long) __per_cpu_start); + ptr = alloc_bootmem(size * NR_CPUS); __per_cpu_base = ptr - __per_cpu_start; - if ((__per_cpu_shift < PAGE_SHIFT) || - (__per_cpu_base & ~PAGE_MASK) || - (__per_cpu_base != (((long) __per_cpu_base << 20) >> 20))) { - prom_printf("PER_CPU: Invalid layout, " - "ptr[%p] shift[%lx] base[%lx]\n", - ptr, __per_cpu_shift, __per_cpu_base); - prom_halt(); - } - for (i = 0; i < NR_CPUS; i++, ptr += size) memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start); - - /* Finally, load in the boot cpu's base value. - * We abuse the IMMU TSB register for trap handler - * entry and exit loading of %g5. That is why it - * has to be page aligned. - */ - cpu_setup_percpu_base(hard_smp_processor_id()); } diff --git a/arch/sparc64/kernel/sparc64_ksyms.c b/arch/sparc64/kernel/sparc64_ksyms.c index 3c06bfb92a8..f5e8db1de76 100644 --- a/arch/sparc64/kernel/sparc64_ksyms.c +++ b/arch/sparc64/kernel/sparc64_ksyms.c @@ -95,9 +95,6 @@ extern int __ashrdi3(int, int); extern int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs); -extern unsigned long phys_base; -extern unsigned long pfn_base; - extern unsigned int sys_call_table[]; extern void xor_vis_2(unsigned long, unsigned long *, unsigned long *); @@ -108,6 +105,14 @@ extern void xor_vis_4(unsigned long, unsigned long *, unsigned long *, extern void xor_vis_5(unsigned long, unsigned long *, unsigned long *, unsigned long *, unsigned long *, unsigned long *); +extern void xor_niagara_2(unsigned long, unsigned long *, unsigned long *); +extern void xor_niagara_3(unsigned long, unsigned long *, unsigned long *, + unsigned long *); +extern void xor_niagara_4(unsigned long, unsigned long *, unsigned long *, + unsigned long *, unsigned long *); +extern void xor_niagara_5(unsigned long, unsigned long *, unsigned long *, + unsigned long *, unsigned long *, unsigned long *); + /* Per-CPU information table */ EXPORT_PER_CPU_SYMBOL(__cpu_data); @@ -170,11 +175,6 @@ EXPORT_SYMBOL(set_bit); EXPORT_SYMBOL(clear_bit); EXPORT_SYMBOL(change_bit); -/* Bit searching */ -EXPORT_SYMBOL(find_next_bit); -EXPORT_SYMBOL(find_next_zero_bit); -EXPORT_SYMBOL(find_next_zero_le_bit); - EXPORT_SYMBOL(ivector_table); EXPORT_SYMBOL(enable_irq); EXPORT_SYMBOL(disable_irq); @@ -241,10 +241,6 @@ EXPORT_SYMBOL(verify_compat_iovec); #endif EXPORT_SYMBOL(dump_fpu); -EXPORT_SYMBOL(pte_alloc_one_kernel); -#ifndef CONFIG_SMP -EXPORT_SYMBOL(pgt_quicklists); -#endif EXPORT_SYMBOL(put_fs_struct); /* math-emu wants this */ @@ -278,18 +274,9 @@ EXPORT_SYMBOL(__prom_getsibling); /* sparc library symbols */ EXPORT_SYMBOL(strlen); -EXPORT_SYMBOL(strnlen); EXPORT_SYMBOL(__strlen_user); EXPORT_SYMBOL(__strnlen_user); -EXPORT_SYMBOL(strcpy); -EXPORT_SYMBOL(strncpy); -EXPORT_SYMBOL(strcat); -EXPORT_SYMBOL(strncat); -EXPORT_SYMBOL(strcmp); -EXPORT_SYMBOL(strchr); -EXPORT_SYMBOL(strrchr); EXPORT_SYMBOL(strpbrk); -EXPORT_SYMBOL(strstr); #ifdef CONFIG_SOLARIS_EMUL_MODULE EXPORT_SYMBOL(linux_sparc_syscall); @@ -323,7 +310,6 @@ EXPORT_SYMBOL(__memscan_zero); EXPORT_SYMBOL(__memscan_generic); EXPORT_SYMBOL(__memcmp); EXPORT_SYMBOL(__memset); -EXPORT_SYMBOL(memchr); EXPORT_SYMBOL(csum_partial); EXPORT_SYMBOL(csum_partial_copy_nocheck); @@ -339,14 +325,10 @@ EXPORT_SYMBOL(copy_to_user_fixup); EXPORT_SYMBOL(copy_from_user_fixup); EXPORT_SYMBOL(copy_in_user_fixup); EXPORT_SYMBOL(__strncpy_from_user); -EXPORT_SYMBOL(__bzero_noasi); +EXPORT_SYMBOL(__clear_user); /* Various address conversion macros use this. */ -EXPORT_SYMBOL(phys_base); -EXPORT_SYMBOL(pfn_base); EXPORT_SYMBOL(sparc64_valid_addr_bitmap); -EXPORT_SYMBOL(page_to_pfn); -EXPORT_SYMBOL(pfn_to_page); /* No version information on this, heavily used in inline asm, * and will always be 'void __ret_efault(void)'. @@ -392,4 +374,9 @@ EXPORT_SYMBOL(xor_vis_3); EXPORT_SYMBOL(xor_vis_4); EXPORT_SYMBOL(xor_vis_5); +EXPORT_SYMBOL(xor_niagara_2); +EXPORT_SYMBOL(xor_niagara_3); +EXPORT_SYMBOL(xor_niagara_4); +EXPORT_SYMBOL(xor_niagara_5); + EXPORT_SYMBOL(prom_palette); diff --git a/arch/sparc64/kernel/sun4v_ivec.S b/arch/sparc64/kernel/sun4v_ivec.S new file mode 100644 index 00000000000..b49a68bdda4 --- /dev/null +++ b/arch/sparc64/kernel/sun4v_ivec.S @@ -0,0 +1,334 @@ +/* sun4v_ivec.S: Sun4v interrupt vector handling. + * + * Copyright (C) 2006 <davem@davemloft.net> + */ + +#include <asm/cpudata.h> +#include <asm/intr_queue.h> + + .text + .align 32 + +sun4v_cpu_mondo: + /* Head offset in %g2, tail offset in %g4. + * If they are the same, no work. + */ + mov INTRQ_CPU_MONDO_HEAD, %g2 + ldxa [%g2] ASI_QUEUE, %g2 + mov INTRQ_CPU_MONDO_TAIL, %g4 + ldxa [%g4] ASI_QUEUE, %g4 + cmp %g2, %g4 + be,pn %xcc, sun4v_cpu_mondo_queue_empty + nop + + /* Get &trap_block[smp_processor_id()] into %g3. */ + ldxa [%g0] ASI_SCRATCHPAD, %g3 + sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 + + /* Get CPU mondo queue base phys address into %g7. */ + ldx [%g3 + TRAP_PER_CPU_CPU_MONDO_PA], %g7 + + /* Now get the cross-call arguments and handler PC, same + * layout as sun4u: + * + * 1st 64-bit word: low half is 32-bit PC, put into %g3 and jmpl to it + * high half is context arg to MMU flushes, into %g5 + * 2nd 64-bit word: 64-bit arg, load into %g1 + * 3rd 64-bit word: 64-bit arg, load into %g7 + */ + ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g3 + add %g2, 0x8, %g2 + srlx %g3, 32, %g5 + ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 + add %g2, 0x8, %g2 + srl %g3, 0, %g3 + ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g7 + add %g2, 0x40 - 0x8 - 0x8, %g2 + + /* Update queue head pointer. */ + sethi %hi(8192 - 1), %g4 + or %g4, %lo(8192 - 1), %g4 + and %g2, %g4, %g2 + + mov INTRQ_CPU_MONDO_HEAD, %g4 + stxa %g2, [%g4] ASI_QUEUE + membar #Sync + + jmpl %g3, %g0 + nop + +sun4v_cpu_mondo_queue_empty: + retry + +sun4v_dev_mondo: + /* Head offset in %g2, tail offset in %g4. */ + mov INTRQ_DEVICE_MONDO_HEAD, %g2 + ldxa [%g2] ASI_QUEUE, %g2 + mov INTRQ_DEVICE_MONDO_TAIL, %g4 + ldxa [%g4] ASI_QUEUE, %g4 + cmp %g2, %g4 + be,pn %xcc, sun4v_dev_mondo_queue_empty + nop + + /* Get &trap_block[smp_processor_id()] into %g3. */ + ldxa [%g0] ASI_SCRATCHPAD, %g3 + sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 + + /* Get DEV mondo queue base phys address into %g5. */ + ldx [%g3 + TRAP_PER_CPU_DEV_MONDO_PA], %g5 + + /* Load IVEC into %g3. */ + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + add %g2, 0x40, %g2 + + /* XXX There can be a full 64-byte block of data here. + * XXX This is how we can get at MSI vector data. + * XXX Current we do not capture this, but when we do we'll + * XXX need to add a 64-byte storage area in the struct ino_bucket + * XXX or the struct irq_desc. + */ + + /* Update queue head pointer, this frees up some registers. */ + sethi %hi(8192 - 1), %g4 + or %g4, %lo(8192 - 1), %g4 + and %g2, %g4, %g2 + + mov INTRQ_DEVICE_MONDO_HEAD, %g4 + stxa %g2, [%g4] ASI_QUEUE + membar #Sync + + /* Get &__irq_work[smp_processor_id()] into %g1. */ + TRAP_LOAD_IRQ_WORK(%g1, %g4) + + /* Get &ivector_table[IVEC] into %g4. */ + sethi %hi(ivector_table), %g4 + sllx %g3, 5, %g3 + or %g4, %lo(ivector_table), %g4 + add %g4, %g3, %g4 + + /* Load IRQ %pil into %g5. */ + ldub [%g4 + 0x04], %g5 + + /* Insert ivector_table[] entry into __irq_work[] queue. */ + sllx %g5, 2, %g3 + lduw [%g1 + %g3], %g2 /* g2 = irq_work(cpu, pil) */ + stw %g2, [%g4 + 0x00] /* bucket->irq_chain = g2 */ + stw %g4, [%g1 + %g3] /* irq_work(cpu, pil) = bucket */ + + /* Signal the interrupt by setting (1 << pil) in %softint. */ + mov 1, %g2 + sllx %g2, %g5, %g2 + wr %g2, 0x0, %set_softint + +sun4v_dev_mondo_queue_empty: + retry + +sun4v_res_mondo: + /* Head offset in %g2, tail offset in %g4. */ + mov INTRQ_RESUM_MONDO_HEAD, %g2 + ldxa [%g2] ASI_QUEUE, %g2 + mov INTRQ_RESUM_MONDO_TAIL, %g4 + ldxa [%g4] ASI_QUEUE, %g4 + cmp %g2, %g4 + be,pn %xcc, sun4v_res_mondo_queue_empty + nop + + /* Get &trap_block[smp_processor_id()] into %g3. */ + ldxa [%g0] ASI_SCRATCHPAD, %g3 + sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 + + /* Get RES mondo queue base phys address into %g5. */ + ldx [%g3 + TRAP_PER_CPU_RESUM_MONDO_PA], %g5 + + /* Get RES kernel buffer base phys address into %g7. */ + ldx [%g3 + TRAP_PER_CPU_RESUM_KBUF_PA], %g7 + + /* If the first word is non-zero, queue is full. */ + ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 + brnz,pn %g1, sun4v_res_mondo_queue_full + nop + + /* Remember this entry's offset in %g1. */ + mov %g2, %g1 + + /* Copy 64-byte queue entry into kernel buffer. */ + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + + /* Update queue head pointer. */ + sethi %hi(8192 - 1), %g4 + or %g4, %lo(8192 - 1), %g4 + and %g2, %g4, %g2 + + mov INTRQ_RESUM_MONDO_HEAD, %g4 + stxa %g2, [%g4] ASI_QUEUE + membar #Sync + + /* Disable interrupts and save register state so we can call + * C code. The etrap handling will leave %g4 in %l4 for us + * when it's done. + */ + rdpr %pil, %g2 + wrpr %g0, 15, %pil + mov %g1, %g4 + ba,pt %xcc, etrap_irq + rd %pc, %g7 + + /* Log the event. */ + add %sp, PTREGS_OFF, %o0 + call sun4v_resum_error + mov %l4, %o1 + + /* Return from trap. */ + ba,pt %xcc, rtrap_irq + nop + +sun4v_res_mondo_queue_empty: + retry + +sun4v_res_mondo_queue_full: + /* The queue is full, consolidate our damage by setting + * the head equal to the tail. We'll just trap again otherwise. + * Call C code to log the event. + */ + mov INTRQ_RESUM_MONDO_HEAD, %g2 + stxa %g4, [%g2] ASI_QUEUE + membar #Sync + + rdpr %pil, %g2 + wrpr %g0, 15, %pil + ba,pt %xcc, etrap_irq + rd %pc, %g7 + + call sun4v_resum_overflow + add %sp, PTREGS_OFF, %o0 + + ba,pt %xcc, rtrap_irq + nop + +sun4v_nonres_mondo: + /* Head offset in %g2, tail offset in %g4. */ + mov INTRQ_NONRESUM_MONDO_HEAD, %g2 + ldxa [%g2] ASI_QUEUE, %g2 + mov INTRQ_NONRESUM_MONDO_TAIL, %g4 + ldxa [%g4] ASI_QUEUE, %g4 + cmp %g2, %g4 + be,pn %xcc, sun4v_nonres_mondo_queue_empty + nop + + /* Get &trap_block[smp_processor_id()] into %g3. */ + ldxa [%g0] ASI_SCRATCHPAD, %g3 + sub %g3, TRAP_PER_CPU_FAULT_INFO, %g3 + + /* Get RES mondo queue base phys address into %g5. */ + ldx [%g3 + TRAP_PER_CPU_NONRESUM_MONDO_PA], %g5 + + /* Get RES kernel buffer base phys address into %g7. */ + ldx [%g3 + TRAP_PER_CPU_NONRESUM_KBUF_PA], %g7 + + /* If the first word is non-zero, queue is full. */ + ldxa [%g7 + %g2] ASI_PHYS_USE_EC, %g1 + brnz,pn %g1, sun4v_nonres_mondo_queue_full + nop + + /* Remember this entry's offset in %g1. */ + mov %g2, %g1 + + /* Copy 64-byte queue entry into kernel buffer. */ + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + ldxa [%g5 + %g2] ASI_PHYS_USE_EC, %g3 + stxa %g3, [%g7 + %g2] ASI_PHYS_USE_EC + add %g2, 0x08, %g2 + + /* Update queue head pointer. */ + sethi %hi(8192 - 1), %g4 + or %g4, %lo(8192 - 1), %g4 + and %g2, %g4, %g2 + + mov INTRQ_NONRESUM_MONDO_HEAD, %g4 + stxa %g2, [%g4] ASI_QUEUE + membar #Sync + + /* Disable interrupts and save register state so we can call + * C code. The etrap handling will leave %g4 in %l4 for us + * when it's done. + */ + rdpr %pil, %g2 + wrpr %g0, 15, %pil + mov %g1, %g4 + ba,pt %xcc, etrap_irq + rd %pc, %g7 + + /* Log the event. */ + add %sp, PTREGS_OFF, %o0 + call sun4v_nonresum_error + mov %l4, %o1 + + /* Return from trap. */ + ba,pt %xcc, rtrap_irq + nop + +sun4v_nonres_mondo_queue_empty: + retry + +sun4v_nonres_mondo_queue_full: + /* The queue is full, consolidate our damage by setting + * the head equal to the tail. We'll just trap again otherwise. + * Call C code to log the event. + */ + mov INTRQ_NONRESUM_MONDO_HEAD, %g2 + stxa %g4, [%g2] ASI_QUEUE + membar #Sync + + rdpr %pil, %g2 + wrpr %g0, 15, %pil + ba,pt %xcc, etrap_irq + rd %pc, %g7 + + call sun4v_nonresum_overflow + add %sp, PTREGS_OFF, %o0 + + ba,pt %xcc, rtrap_irq + nop diff --git a/arch/sparc64/kernel/sun4v_tlb_miss.S b/arch/sparc64/kernel/sun4v_tlb_miss.S new file mode 100644 index 00000000000..b731881224e --- /dev/null +++ b/arch/sparc64/kernel/sun4v_tlb_miss.S @@ -0,0 +1,426 @@ +/* sun4v_tlb_miss.S: Sun4v TLB miss handlers. + * + * Copyright (C) 2006 <davem@davemloft.net> + */ + + .text + .align 32 + + /* Load ITLB fault information into VADDR and CTX, using BASE. */ +#define LOAD_ITLB_INFO(BASE, VADDR, CTX) \ + ldx [BASE + HV_FAULT_I_ADDR_OFFSET], VADDR; \ + ldx [BASE + HV_FAULT_I_CTX_OFFSET], CTX; + + /* Load DTLB fault information into VADDR and CTX, using BASE. */ +#define LOAD_DTLB_INFO(BASE, VADDR, CTX) \ + ldx [BASE + HV_FAULT_D_ADDR_OFFSET], VADDR; \ + ldx [BASE + HV_FAULT_D_CTX_OFFSET], CTX; + + /* DEST = (VADDR >> 22) + * + * Branch to ZERO_CTX_LABEL if context is zero. + */ +#define COMPUTE_TAG_TARGET(DEST, VADDR, CTX, ZERO_CTX_LABEL) \ + srlx VADDR, 22, DEST; \ + brz,pn CTX, ZERO_CTX_LABEL; \ + nop; + + /* Create TSB pointer. This is something like: + * + * index_mask = (512 << (tsb_reg & 0x7UL)) - 1UL; + * tsb_base = tsb_reg & ~0x7UL; + * tsb_index = ((vaddr >> HASH_SHIFT) & tsb_mask); + * tsb_ptr = tsb_base + (tsb_index * 16); + */ +#define COMPUTE_TSB_PTR(TSB_PTR, VADDR, HASH_SHIFT, TMP1, TMP2) \ + and TSB_PTR, 0x7, TMP1; \ + mov 512, TMP2; \ + andn TSB_PTR, 0x7, TSB_PTR; \ + sllx TMP2, TMP1, TMP2; \ + srlx VADDR, HASH_SHIFT, TMP1; \ + sub TMP2, 1, TMP2; \ + and TMP1, TMP2, TMP1; \ + sllx TMP1, 4, TMP1; \ + add TSB_PTR, TMP1, TSB_PTR; + +sun4v_itlb_miss: + /* Load MMU Miss base into %g2. */ + ldxa [%g0] ASI_SCRATCHPAD, %g2 + + /* Load UTSB reg into %g1. */ + mov SCRATCHPAD_UTSBREG1, %g1 + ldxa [%g1] ASI_SCRATCHPAD, %g1 + + LOAD_ITLB_INFO(%g2, %g4, %g5) + COMPUTE_TAG_TARGET(%g6, %g4, %g5, kvmap_itlb_4v) + COMPUTE_TSB_PTR(%g1, %g4, PAGE_SHIFT, %g3, %g7) + + /* Load TSB tag/pte into %g2/%g3 and compare the tag. */ + ldda [%g1] ASI_QUAD_LDD_PHYS_4V, %g2 + cmp %g2, %g6 + bne,a,pn %xcc, tsb_miss_page_table_walk + mov FAULT_CODE_ITLB, %g3 + andcc %g3, _PAGE_EXEC_4V, %g0 + be,a,pn %xcc, tsb_do_fault + mov FAULT_CODE_ITLB, %g3 + + /* We have a valid entry, make hypervisor call to load + * I-TLB and return from trap. + * + * %g3: PTE + * %g4: vaddr + */ +sun4v_itlb_load: + ldxa [%g0] ASI_SCRATCHPAD, %g6 + mov %o0, %g1 ! save %o0 + mov %o1, %g2 ! save %o1 + mov %o2, %g5 ! save %o2 + mov %o3, %g7 ! save %o3 + mov %g4, %o0 ! vaddr + ldx [%g6 + HV_FAULT_I_CTX_OFFSET], %o1 ! ctx + mov %g3, %o2 ! PTE + mov HV_MMU_IMMU, %o3 ! flags + ta HV_MMU_MAP_ADDR_TRAP + brnz,pn %o0, sun4v_itlb_error + mov %g2, %o1 ! restore %o1 + mov %g1, %o0 ! restore %o0 + mov %g5, %o2 ! restore %o2 + mov %g7, %o3 ! restore %o3 + + retry + +sun4v_dtlb_miss: + /* Load MMU Miss base into %g2. */ + ldxa [%g0] ASI_SCRATCHPAD, %g2 + + /* Load UTSB reg into %g1. */ + mov SCRATCHPAD_UTSBREG1, %g1 + ldxa [%g1] ASI_SCRATCHPAD, %g1 + + LOAD_DTLB_INFO(%g2, %g4, %g5) + COMPUTE_TAG_TARGET(%g6, %g4, %g5, kvmap_dtlb_4v) + COMPUTE_TSB_PTR(%g1, %g4, PAGE_SHIFT, %g3, %g7) + + /* Load TSB tag/pte into %g2/%g3 and compare the tag. */ + ldda [%g1] ASI_QUAD_LDD_PHYS_4V, %g2 + cmp %g2, %g6 + bne,a,pn %xcc, tsb_miss_page_table_walk + mov FAULT_CODE_DTLB, %g3 + + /* We have a valid entry, make hypervisor call to load + * D-TLB and return from trap. + * + * %g3: PTE + * %g4: vaddr + */ +sun4v_dtlb_load: + ldxa [%g0] ASI_SCRATCHPAD, %g6 + mov %o0, %g1 ! save %o0 + mov %o1, %g2 ! save %o1 + mov %o2, %g5 ! save %o2 + mov %o3, %g7 ! save %o3 + mov %g4, %o0 ! vaddr + ldx [%g6 + HV_FAULT_D_CTX_OFFSET], %o1 ! ctx + mov %g3, %o2 ! PTE + mov HV_MMU_DMMU, %o3 ! flags + ta HV_MMU_MAP_ADDR_TRAP + brnz,pn %o0, sun4v_dtlb_error + mov %g2, %o1 ! restore %o1 + mov %g1, %o0 ! restore %o0 + mov %g5, %o2 ! restore %o2 + mov %g7, %o3 ! restore %o3 + + retry + +sun4v_dtlb_prot: + SET_GL(1) + + /* Load MMU Miss base into %g5. */ + ldxa [%g0] ASI_SCRATCHPAD, %g5 + + ldx [%g5 + HV_FAULT_D_ADDR_OFFSET], %g5 + rdpr %tl, %g1 + cmp %g1, 1 + bgu,pn %xcc, winfix_trampoline + nop + ba,pt %xcc, sparc64_realfault_common + mov FAULT_CODE_DTLB | FAULT_CODE_WRITE, %g4 + + /* Called from trap table: + * %g4: vaddr + * %g5: context + * %g6: TAG TARGET + */ +sun4v_itsb_miss: + mov SCRATCHPAD_UTSBREG1, %g1 + ldxa [%g1] ASI_SCRATCHPAD, %g1 + brz,pn %g5, kvmap_itlb_4v + mov FAULT_CODE_ITLB, %g3 + ba,a,pt %xcc, sun4v_tsb_miss_common + + /* Called from trap table: + * %g4: vaddr + * %g5: context + * %g6: TAG TARGET + */ +sun4v_dtsb_miss: + mov SCRATCHPAD_UTSBREG1, %g1 + ldxa [%g1] ASI_SCRATCHPAD, %g1 + brz,pn %g5, kvmap_dtlb_4v + mov FAULT_CODE_DTLB, %g3 + + /* fallthrough */ + +sun4v_tsb_miss_common: + COMPUTE_TSB_PTR(%g1, %g4, PAGE_SHIFT, %g5, %g7) + + sub %g2, TRAP_PER_CPU_FAULT_INFO, %g2 + +#ifdef CONFIG_HUGETLB_PAGE + mov SCRATCHPAD_UTSBREG2, %g5 + ldxa [%g5] ASI_SCRATCHPAD, %g5 + cmp %g5, -1 + be,pt %xcc, 80f + nop + COMPUTE_TSB_PTR(%g5, %g4, HPAGE_SHIFT, %g2, %g7) + + /* That clobbered %g2, reload it. */ + ldxa [%g0] ASI_SCRATCHPAD, %g2 + sub %g2, TRAP_PER_CPU_FAULT_INFO, %g2 + +80: stx %g5, [%g2 + TRAP_PER_CPU_TSB_HUGE_TEMP] +#endif + + ba,pt %xcc, tsb_miss_page_table_walk_sun4v_fastpath + ldx [%g2 + TRAP_PER_CPU_PGD_PADDR], %g7 + +sun4v_itlb_error: + sethi %hi(sun4v_err_itlb_vaddr), %g1 + stx %g4, [%g1 + %lo(sun4v_err_itlb_vaddr)] + sethi %hi(sun4v_err_itlb_ctx), %g1 + ldxa [%g0] ASI_SCRATCHPAD, %g6 + ldx [%g6 + HV_FAULT_I_CTX_OFFSET], %o1 + stx %o1, [%g1 + %lo(sun4v_err_itlb_ctx)] + sethi %hi(sun4v_err_itlb_pte), %g1 + stx %g3, [%g1 + %lo(sun4v_err_itlb_pte)] + sethi %hi(sun4v_err_itlb_error), %g1 + stx %o0, [%g1 + %lo(sun4v_err_itlb_error)] + + rdpr %tl, %g4 + cmp %g4, 1 + ble,pt %icc, 1f + sethi %hi(2f), %g7 + ba,pt %xcc, etraptl1 + or %g7, %lo(2f), %g7 + +1: ba,pt %xcc, etrap +2: or %g7, %lo(2b), %g7 + call sun4v_itlb_error_report + add %sp, PTREGS_OFF, %o0 + + /* NOTREACHED */ + +sun4v_dtlb_error: + sethi %hi(sun4v_err_dtlb_vaddr), %g1 + stx %g4, [%g1 + %lo(sun4v_err_dtlb_vaddr)] + sethi %hi(sun4v_err_dtlb_ctx), %g1 + ldxa [%g0] ASI_SCRATCHPAD, %g6 + ldx [%g6 + HV_FAULT_D_CTX_OFFSET], %o1 + stx %o1, [%g1 + %lo(sun4v_err_dtlb_ctx)] + sethi %hi(sun4v_err_dtlb_pte), %g1 + stx %g3, [%g1 + %lo(sun4v_err_dtlb_pte)] + sethi %hi(sun4v_err_dtlb_error), %g1 + stx %o0, [%g1 + %lo(sun4v_err_dtlb_error)] + + rdpr %tl, %g4 + cmp %g4, 1 + ble,pt %icc, 1f + sethi %hi(2f), %g7 + ba,pt %xcc, etraptl1 + or %g7, %lo(2f), %g7 + +1: ba,pt %xcc, etrap +2: or %g7, %lo(2b), %g7 + call sun4v_dtlb_error_report + add %sp, PTREGS_OFF, %o0 + + /* NOTREACHED */ + + /* Instruction Access Exception, tl0. */ +sun4v_iacc: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_I_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call sun4v_insn_access_exception + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Instruction Access Exception, tl1. */ +sun4v_iacc_tl1: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_I_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_I_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_I_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etraptl1 + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call sun4v_insn_access_exception_tl1 + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Data Access Exception, tl0. */ +sun4v_dacc: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call sun4v_data_access_exception + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Data Access Exception, tl1. */ +sun4v_dacc_tl1: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etraptl1 + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call sun4v_data_access_exception_tl1 + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Memory Address Unaligned. */ +sun4v_mna: + /* Window fixup? */ + rdpr %tl, %g2 + cmp %g2, 1 + ble,pt %icc, 1f + nop + + SET_GL(1) + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g5 + mov HV_FAULT_TYPE_UNALIGNED, %g3 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g4 + sllx %g3, 16, %g3 + or %g4, %g3, %g4 + ba,pt %xcc, winfix_mna + rdpr %tpc, %g3 + /* not reached */ + +1: ldxa [%g0] ASI_SCRATCHPAD, %g2 + mov HV_FAULT_TYPE_UNALIGNED, %g3 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call sun4v_do_mna + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Privileged Action. */ +sun4v_privact: + ba,pt %xcc, etrap + rd %pc, %g7 + call do_privact + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Unaligned ldd float, tl0. */ +sun4v_lddfmna: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call handle_lddfmna + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + + /* Unaligned std float, tl0. */ +sun4v_stdfmna: + ldxa [%g0] ASI_SCRATCHPAD, %g2 + ldx [%g2 + HV_FAULT_D_TYPE_OFFSET], %g3 + ldx [%g2 + HV_FAULT_D_ADDR_OFFSET], %g4 + ldx [%g2 + HV_FAULT_D_CTX_OFFSET], %g5 + sllx %g3, 16, %g3 + or %g5, %g3, %g5 + ba,pt %xcc, etrap + rd %pc, %g7 + mov %l4, %o1 + mov %l5, %o2 + call handle_stdfmna + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define SUN4V_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + sll %g1, 11, %g1; \ + srl %g1, 11 + 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + + .globl sun4v_patch_tlb_handlers + .type sun4v_patch_tlb_handlers,#function +sun4v_patch_tlb_handlers: + SUN4V_DO_PATCH(tl0_iamiss, sun4v_itlb_miss) + SUN4V_DO_PATCH(tl1_iamiss, sun4v_itlb_miss) + SUN4V_DO_PATCH(tl0_damiss, sun4v_dtlb_miss) + SUN4V_DO_PATCH(tl1_damiss, sun4v_dtlb_miss) + SUN4V_DO_PATCH(tl0_daprot, sun4v_dtlb_prot) + SUN4V_DO_PATCH(tl1_daprot, sun4v_dtlb_prot) + SUN4V_DO_PATCH(tl0_iax, sun4v_iacc) + SUN4V_DO_PATCH(tl1_iax, sun4v_iacc_tl1) + SUN4V_DO_PATCH(tl0_dax, sun4v_dacc) + SUN4V_DO_PATCH(tl1_dax, sun4v_dacc_tl1) + SUN4V_DO_PATCH(tl0_mna, sun4v_mna) + SUN4V_DO_PATCH(tl1_mna, sun4v_mna) + SUN4V_DO_PATCH(tl0_lddfmna, sun4v_lddfmna) + SUN4V_DO_PATCH(tl0_stdfmna, sun4v_stdfmna) + SUN4V_DO_PATCH(tl0_privact, sun4v_privact) + retl + nop + .size sun4v_patch_tlb_handlers,.-sun4v_patch_tlb_handlers diff --git a/arch/sparc64/kernel/sys_sparc.c b/arch/sparc64/kernel/sys_sparc.c index 5f8c822a2b4..7a869138c37 100644 --- a/arch/sparc64/kernel/sys_sparc.c +++ b/arch/sparc64/kernel/sys_sparc.c @@ -25,25 +25,93 @@ #include <linux/syscalls.h> #include <linux/ipc.h> #include <linux/personality.h> +#include <linux/random.h> #include <asm/uaccess.h> #include <asm/ipc.h> #include <asm/utrap.h> #include <asm/perfctr.h> +#include <asm/a.out.h> /* #define DEBUG_UNIMP_SYSCALL */ -/* XXX Make this per-binary type, this way we can detect the type of - * XXX a binary. Every Sparc executable calls this very early on. - */ asmlinkage unsigned long sys_getpagesize(void) { return PAGE_SIZE; } -#define COLOUR_ALIGN(addr,pgoff) \ - ((((addr)+SHMLBA-1)&~(SHMLBA-1)) + \ - (((pgoff)<<PAGE_SHIFT) & (SHMLBA-1))) +#define VA_EXCLUDE_START (0x0000080000000000UL - (1UL << 32UL)) +#define VA_EXCLUDE_END (0xfffff80000000000UL + (1UL << 32UL)) + +/* Does addr --> addr+len fall within 4GB of the VA-space hole or + * overflow past the end of the 64-bit address space? + */ +static inline int invalid_64bit_range(unsigned long addr, unsigned long len) +{ + unsigned long va_exclude_start, va_exclude_end; + + va_exclude_start = VA_EXCLUDE_START; + va_exclude_end = VA_EXCLUDE_END; + + if (unlikely(len >= va_exclude_start)) + return 1; + + if (unlikely((addr + len) < addr)) + return 1; + + if (unlikely((addr >= va_exclude_start && addr < va_exclude_end) || + ((addr + len) >= va_exclude_start && + (addr + len) < va_exclude_end))) + return 1; + + return 0; +} + +/* Does start,end straddle the VA-space hole? */ +static inline int straddles_64bit_va_hole(unsigned long start, unsigned long end) +{ + unsigned long va_exclude_start, va_exclude_end; + + va_exclude_start = VA_EXCLUDE_START; + va_exclude_end = VA_EXCLUDE_END; + + if (likely(start < va_exclude_start && end < va_exclude_start)) + return 0; + + if (likely(start >= va_exclude_end && end >= va_exclude_end)) + return 0; + + return 1; +} + +/* These functions differ from the default implementations in + * mm/mmap.c in two ways: + * + * 1) For file backed MAP_SHARED mmap()'s we D-cache color align, + * for fixed such mappings we just validate what the user gave us. + * 2) For 64-bit tasks we avoid mapping anything within 4GB of + * the spitfire/niagara VA-hole. + */ + +static inline unsigned long COLOUR_ALIGN(unsigned long addr, + unsigned long pgoff) +{ + unsigned long base = (addr+SHMLBA-1)&~(SHMLBA-1); + unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); + + return base + off; +} + +static inline unsigned long COLOUR_ALIGN_DOWN(unsigned long addr, + unsigned long pgoff) +{ + unsigned long base = addr & ~(SHMLBA-1); + unsigned long off = (pgoff<<PAGE_SHIFT) & (SHMLBA-1); + + if (base + off <= addr) + return base + off; + return base - off; +} unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags) { @@ -64,8 +132,8 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi } if (test_thread_flag(TIF_32BIT)) - task_size = 0xf0000000UL; - if (len > task_size || len > -PAGE_OFFSET) + task_size = STACK_TOP32; + if (unlikely(len > task_size || len >= VA_EXCLUDE_START)) return -ENOMEM; do_color_align = 0; @@ -84,11 +152,12 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsi return addr; } - if (len <= mm->cached_hole_size) { + if (len > mm->cached_hole_size) { + start_addr = addr = mm->free_area_cache; + } else { + start_addr = addr = TASK_UNMAPPED_BASE; mm->cached_hole_size = 0; - mm->free_area_cache = TASK_UNMAPPED_BASE; } - start_addr = addr = mm->free_area_cache; task_size -= len; @@ -100,11 +169,12 @@ full_search: for (vma = find_vma(mm, addr); ; vma = vma->vm_next) { /* At this point: (!vma || addr < vma->vm_end). */ - if (addr < PAGE_OFFSET && -PAGE_OFFSET - len < addr) { - addr = PAGE_OFFSET; - vma = find_vma(mm, PAGE_OFFSET); + if (addr < VA_EXCLUDE_START && + (addr + len) >= VA_EXCLUDE_START) { + addr = VA_EXCLUDE_END; + vma = find_vma(mm, VA_EXCLUDE_END); } - if (task_size < addr) { + if (unlikely(task_size < addr)) { if (start_addr != TASK_UNMAPPED_BASE) { start_addr = addr = TASK_UNMAPPED_BASE; mm->cached_hole_size = 0; @@ -112,7 +182,7 @@ full_search: } return -ENOMEM; } - if (!vma || addr + len <= vma->vm_start) { + if (likely(!vma || addr + len <= vma->vm_start)) { /* * Remember the place where we stopped the search: */ @@ -128,6 +198,121 @@ full_search: } } +unsigned long +arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, + const unsigned long len, const unsigned long pgoff, + const unsigned long flags) +{ + struct vm_area_struct *vma; + struct mm_struct *mm = current->mm; + unsigned long task_size = STACK_TOP32; + unsigned long addr = addr0; + int do_color_align; + + /* This should only ever run for 32-bit processes. */ + BUG_ON(!test_thread_flag(TIF_32BIT)); + + if (flags & MAP_FIXED) { + /* We do not accept a shared mapping if it would violate + * cache aliasing constraints. + */ + if ((flags & MAP_SHARED) && + ((addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1))) + return -EINVAL; + return addr; + } + + if (unlikely(len > task_size)) + return -ENOMEM; + + do_color_align = 0; + if (filp || (flags & MAP_SHARED)) + do_color_align = 1; + + /* requesting a specific address */ + if (addr) { + if (do_color_align) + addr = COLOUR_ALIGN(addr, pgoff); + else + addr = PAGE_ALIGN(addr); + + vma = find_vma(mm, addr); + if (task_size - len >= addr && + (!vma || addr + len <= vma->vm_start)) + return addr; + } + + /* check if free_area_cache is useful for us */ + if (len <= mm->cached_hole_size) { + mm->cached_hole_size = 0; + mm->free_area_cache = mm->mmap_base; + } + + /* either no address requested or can't fit in requested address hole */ + addr = mm->free_area_cache; + if (do_color_align) { + unsigned long base = COLOUR_ALIGN_DOWN(addr-len, pgoff); + + addr = base + len; + } + + /* make sure it can fit in the remaining address space */ + if (likely(addr > len)) { + vma = find_vma(mm, addr-len); + if (!vma || addr <= vma->vm_start) { + /* remember the address as a hint for next time */ + return (mm->free_area_cache = addr-len); + } + } + + if (unlikely(mm->mmap_base < len)) + goto bottomup; + + addr = mm->mmap_base-len; + if (do_color_align) + addr = COLOUR_ALIGN_DOWN(addr, pgoff); + + do { + /* + * Lookup failure means no vma is above this address, + * else if new region fits below vma->vm_start, + * return with success: + */ + vma = find_vma(mm, addr); + if (likely(!vma || addr+len <= vma->vm_start)) { + /* remember the address as a hint for next time */ + return (mm->free_area_cache = addr); + } + + /* remember the largest hole we saw so far */ + if (addr + mm->cached_hole_size < vma->vm_start) + mm->cached_hole_size = vma->vm_start - addr; + + /* try just below the current vma->vm_start */ + addr = vma->vm_start-len; + if (do_color_align) + addr = COLOUR_ALIGN_DOWN(addr, pgoff); + } while (likely(len < vma->vm_start)); + +bottomup: + /* + * A failed mmap() very likely causes application failure, + * so fall back to the bottom-up function here. This scenario + * can happen with large stack limits and large mmap() + * allocations. + */ + mm->cached_hole_size = ~0UL; + mm->free_area_cache = TASK_UNMAPPED_BASE; + addr = arch_get_unmapped_area(filp, addr0, len, pgoff, flags); + /* + * Restore the topdown base: + */ + mm->free_area_cache = mm->mmap_base; + mm->cached_hole_size = ~0UL; + + return addr; +} + /* Try to align mapping such that we align it as much as possible. */ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, unsigned long len, unsigned long pgoff, unsigned long flags) { @@ -171,15 +356,57 @@ unsigned long get_fb_unmapped_area(struct file *filp, unsigned long orig_addr, u return addr; } +/* Essentially the same as PowerPC... */ +void arch_pick_mmap_layout(struct mm_struct *mm) +{ + unsigned long random_factor = 0UL; + + if (current->flags & PF_RANDOMIZE) { + random_factor = get_random_int(); + if (test_thread_flag(TIF_32BIT)) + random_factor &= ((1 * 1024 * 1024) - 1); + else + random_factor = ((random_factor << PAGE_SHIFT) & + 0xffffffffUL); + } + + /* + * Fall back to the standard layout if the personality + * bit is set, or if the expected stack growth is unlimited: + */ + if (!test_thread_flag(TIF_32BIT) || + (current->personality & ADDR_COMPAT_LAYOUT) || + current->signal->rlim[RLIMIT_STACK].rlim_cur == RLIM_INFINITY || + sysctl_legacy_va_layout) { + mm->mmap_base = TASK_UNMAPPED_BASE + random_factor; + mm->get_unmapped_area = arch_get_unmapped_area; + mm->unmap_area = arch_unmap_area; + } else { + /* We know it's 32-bit */ + unsigned long task_size = STACK_TOP32; + unsigned long gap; + + gap = current->signal->rlim[RLIMIT_STACK].rlim_cur; + if (gap < 128 * 1024 * 1024) + gap = 128 * 1024 * 1024; + if (gap > (task_size / 6 * 5)) + gap = (task_size / 6 * 5); + + mm->mmap_base = PAGE_ALIGN(task_size - gap - random_factor); + mm->get_unmapped_area = arch_get_unmapped_area_topdown; + mm->unmap_area = arch_unmap_area_topdown; + } +} + asmlinkage unsigned long sparc_brk(unsigned long brk) { /* People could try to be nasty and use ta 0x6d in 32bit programs */ - if (test_thread_flag(TIF_32BIT) && - brk >= 0xf0000000UL) + if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32) return current->mm->brk; - if ((current->mm->brk & PAGE_OFFSET) != (brk & PAGE_OFFSET)) + if (unlikely(straddles_64bit_va_hole(current->mm->brk, brk))) return current->mm->brk; + return sys_brk(brk); } @@ -340,13 +567,16 @@ asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, retval = -EINVAL; if (test_thread_flag(TIF_32BIT)) { - if (len > 0xf0000000UL || - ((flags & MAP_FIXED) && addr > 0xf0000000UL - len)) + if (len >= STACK_TOP32) + goto out_putf; + + if ((flags & MAP_FIXED) && addr > STACK_TOP32 - len) goto out_putf; } else { - if (len > -PAGE_OFFSET || - ((flags & MAP_FIXED) && - addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET)) + if (len >= VA_EXCLUDE_START) + goto out_putf; + + if ((flags & MAP_FIXED) && invalid_64bit_range(addr, len)) goto out_putf; } @@ -365,9 +595,9 @@ asmlinkage long sys64_munmap(unsigned long addr, size_t len) { long ret; - if (len > -PAGE_OFFSET || - (addr < PAGE_OFFSET && addr + len > -PAGE_OFFSET)) + if (invalid_64bit_range(addr, len)) return -EINVAL; + down_write(¤t->mm->mmap_sem); ret = do_munmap(current->mm, addr, len); up_write(¤t->mm->mmap_sem); @@ -384,18 +614,19 @@ asmlinkage unsigned long sys64_mremap(unsigned long addr, { struct vm_area_struct *vma; unsigned long ret = -EINVAL; + if (test_thread_flag(TIF_32BIT)) goto out; - if (old_len > -PAGE_OFFSET || new_len > -PAGE_OFFSET) + if (unlikely(new_len >= VA_EXCLUDE_START)) goto out; - if (addr < PAGE_OFFSET && addr + old_len > -PAGE_OFFSET) + if (unlikely(invalid_64bit_range(addr, old_len))) goto out; + down_write(¤t->mm->mmap_sem); if (flags & MREMAP_FIXED) { - if (new_addr < PAGE_OFFSET && - new_addr + new_len > -PAGE_OFFSET) + if (invalid_64bit_range(new_addr, new_len)) goto out_sem; - } else if (addr < PAGE_OFFSET && addr + new_len > -PAGE_OFFSET) { + } else if (invalid_64bit_range(addr, new_len)) { unsigned long map_flags = 0; struct file *file = NULL; @@ -554,12 +785,10 @@ asmlinkage long sys_utrap_install(utrap_entry_t type, } if (!current_thread_info()->utraps) { current_thread_info()->utraps = - kmalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); + kzalloc((UT_TRAP_INSTRUCTION_31+1)*sizeof(long), GFP_KERNEL); if (!current_thread_info()->utraps) return -ENOMEM; current_thread_info()->utraps[0] = 1; - memset(current_thread_info()->utraps+1, 0, - UT_TRAP_INSTRUCTION_31*sizeof(long)); } else { if ((utrap_handler_t)current_thread_info()->utraps[type] != new_p && current_thread_info()->utraps[0] > 1) { diff --git a/arch/sparc64/kernel/sys_sparc32.c b/arch/sparc64/kernel/sys_sparc32.c index 417727bd87b..2e906bad56f 100644 --- a/arch/sparc64/kernel/sys_sparc32.c +++ b/arch/sparc64/kernel/sys_sparc32.c @@ -19,7 +19,6 @@ #include <linux/resource.h> #include <linux/times.h> #include <linux/utsname.h> -#include <linux/timex.h> #include <linux/smp.h> #include <linux/smp_lock.h> #include <linux/sem.h> @@ -62,6 +61,7 @@ #include <asm/fpumacro.h> #include <asm/semaphore.h> #include <asm/mmu_context.h> +#include <asm/a.out.h> asmlinkage long sys32_chown16(const char __user * filename, u16 user, u16 group) { @@ -944,79 +944,6 @@ asmlinkage long compat_sys_sendfile64(int out_fd, int in_fd, return ret; } -/* Handle adjtimex compatibility. */ - -struct timex32 { - u32 modes; - s32 offset, freq, maxerror, esterror; - s32 status, constant, precision, tolerance; - struct compat_timeval time; - s32 tick; - s32 ppsfreq, jitter, shift, stabil; - s32 jitcnt, calcnt, errcnt, stbcnt; - s32 :32; s32 :32; s32 :32; s32 :32; - s32 :32; s32 :32; s32 :32; s32 :32; - s32 :32; s32 :32; s32 :32; s32 :32; -}; - -extern int do_adjtimex(struct timex *); - -asmlinkage long sys32_adjtimex(struct timex32 __user *utp) -{ - struct timex txc; - int ret; - - memset(&txc, 0, sizeof(struct timex)); - - if (get_user(txc.modes, &utp->modes) || - __get_user(txc.offset, &utp->offset) || - __get_user(txc.freq, &utp->freq) || - __get_user(txc.maxerror, &utp->maxerror) || - __get_user(txc.esterror, &utp->esterror) || - __get_user(txc.status, &utp->status) || - __get_user(txc.constant, &utp->constant) || - __get_user(txc.precision, &utp->precision) || - __get_user(txc.tolerance, &utp->tolerance) || - __get_user(txc.time.tv_sec, &utp->time.tv_sec) || - __get_user(txc.time.tv_usec, &utp->time.tv_usec) || - __get_user(txc.tick, &utp->tick) || - __get_user(txc.ppsfreq, &utp->ppsfreq) || - __get_user(txc.jitter, &utp->jitter) || - __get_user(txc.shift, &utp->shift) || - __get_user(txc.stabil, &utp->stabil) || - __get_user(txc.jitcnt, &utp->jitcnt) || - __get_user(txc.calcnt, &utp->calcnt) || - __get_user(txc.errcnt, &utp->errcnt) || - __get_user(txc.stbcnt, &utp->stbcnt)) - return -EFAULT; - - ret = do_adjtimex(&txc); - - if (put_user(txc.modes, &utp->modes) || - __put_user(txc.offset, &utp->offset) || - __put_user(txc.freq, &utp->freq) || - __put_user(txc.maxerror, &utp->maxerror) || - __put_user(txc.esterror, &utp->esterror) || - __put_user(txc.status, &utp->status) || - __put_user(txc.constant, &utp->constant) || - __put_user(txc.precision, &utp->precision) || - __put_user(txc.tolerance, &utp->tolerance) || - __put_user(txc.time.tv_sec, &utp->time.tv_sec) || - __put_user(txc.time.tv_usec, &utp->time.tv_usec) || - __put_user(txc.tick, &utp->tick) || - __put_user(txc.ppsfreq, &utp->ppsfreq) || - __put_user(txc.jitter, &utp->jitter) || - __put_user(txc.shift, &utp->shift) || - __put_user(txc.stabil, &utp->stabil) || - __put_user(txc.jitcnt, &utp->jitcnt) || - __put_user(txc.calcnt, &utp->calcnt) || - __put_user(txc.errcnt, &utp->errcnt) || - __put_user(txc.stbcnt, &utp->stbcnt)) - ret = -EFAULT; - - return ret; -} - /* This is just a version for 32-bit applications which does * not force O_LARGEFILE on. */ @@ -1039,15 +966,15 @@ asmlinkage unsigned long sys32_mremap(unsigned long addr, unsigned long ret = -EINVAL; unsigned long new_addr = __new_addr; - if (old_len > 0xf0000000UL || new_len > 0xf0000000UL) + if (old_len > STACK_TOP32 || new_len > STACK_TOP32) goto out; - if (addr > 0xf0000000UL - old_len) + if (addr > STACK_TOP32 - old_len) goto out; down_write(¤t->mm->mmap_sem); if (flags & MREMAP_FIXED) { - if (new_addr > 0xf0000000UL - new_len) + if (new_addr > STACK_TOP32 - new_len) goto out_sem; - } else if (addr > 0xf0000000UL - new_len) { + } else if (addr > STACK_TOP32 - new_len) { unsigned long map_flags = 0; struct file *file = NULL; diff --git a/arch/sparc64/kernel/systbls.S b/arch/sparc64/kernel/systbls.S index c3adb7ac167..3b250f2318f 100644 --- a/arch/sparc64/kernel/systbls.S +++ b/arch/sparc64/kernel/systbls.S @@ -63,7 +63,7 @@ sys_call_table32: /*200*/ .word sys32_ssetmask, sys_sigsuspend, compat_sys_newlstat, sys_uselib, compat_sys_old_readdir .word sys32_readahead, sys32_socketcall, sys32_syslog, sys32_lookup_dcookie, sys32_fadvise64 /*210*/ .word sys32_fadvise64_64, sys32_tgkill, sys32_waitpid, sys_swapoff, sys32_sysinfo - .word sys32_ipc, sys32_sigreturn, sys_clone, sys32_ioprio_get, sys32_adjtimex + .word sys32_ipc, sys32_sigreturn, sys_clone, sys32_ioprio_get, compat_sys_adjtimex /*220*/ .word sys32_sigprocmask, sys_ni_syscall, sys32_delete_module, sys_ni_syscall, sys32_getpgid .word sys32_bdflush, sys32_sysfs, sys_nis_syscall, sys32_setfsuid16, sys32_setfsgid16 /*230*/ .word sys32_select, compat_sys_time, sys_nis_syscall, compat_sys_stime, compat_sys_statfs64 diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c index a22930d62ad..e55b5c6ece0 100644 --- a/arch/sparc64/kernel/time.c +++ b/arch/sparc64/kernel/time.c @@ -30,6 +30,8 @@ #include <linux/cpufreq.h> #include <linux/percpu.h> #include <linux/profile.h> +#include <linux/miscdevice.h> +#include <linux/rtc.h> #include <asm/oplib.h> #include <asm/mostek.h> @@ -45,6 +47,7 @@ #include <asm/smp.h> #include <asm/sections.h> #include <asm/cpudata.h> +#include <asm/uaccess.h> DEFINE_SPINLOCK(mostek_lock); DEFINE_SPINLOCK(rtc_lock); @@ -193,16 +196,22 @@ struct sparc64_tick_ops *tick_ops __read_mostly = &tick_operations; static void stick_init_tick(unsigned long offset) { - tick_disable_protection(); - - /* Let the user get at STICK too. */ - __asm__ __volatile__( - " rd %%asr24, %%g2\n" - " andn %%g2, %0, %%g2\n" - " wr %%g2, 0, %%asr24" - : /* no outputs */ - : "r" (TICK_PRIV_BIT) - : "g1", "g2"); + /* Writes to the %tick and %stick register are not + * allowed on sun4v. The Hypervisor controls that + * bit, per-strand. + */ + if (tlb_type != hypervisor) { + tick_disable_protection(); + + /* Let the user get at STICK too. */ + __asm__ __volatile__( + " rd %%asr24, %%g2\n" + " andn %%g2, %0, %%g2\n" + " wr %%g2, 0, %%asr24" + : /* no outputs */ + : "r" (TICK_PRIV_BIT) + : "g1", "g2"); + } __asm__ __volatile__( " rd %%asr24, %%g1\n" @@ -632,23 +641,8 @@ static void __init set_system_time(void) mon = MSTK_REG_MONTH(mregs); year = MSTK_CVT_YEAR( MSTK_REG_YEAR(mregs) ); } else { - int i; - /* Dallas 12887 RTC chip. */ - /* Stolen from arch/i386/kernel/time.c, see there for - * credits and descriptive comments. - */ - for (i = 0; i < 1000000; i++) { - if (CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP) - break; - udelay(10); - } - for (i = 0; i < 1000000; i++) { - if (!(CMOS_READ(RTC_FREQ_SELECT) & RTC_UIP)) - break; - udelay(10); - } do { sec = CMOS_READ(RTC_SECONDS); min = CMOS_READ(RTC_MINUTES); @@ -657,6 +651,7 @@ static void __init set_system_time(void) mon = CMOS_READ(RTC_MONTH); year = CMOS_READ(RTC_YEAR); } while (sec != CMOS_READ(RTC_SECONDS)); + if (!(CMOS_READ(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) { BCD_TO_BIN(sec); BCD_TO_BIN(min); @@ -683,6 +678,83 @@ static void __init set_system_time(void) } } +/* davem suggests we keep this within the 4M locked kernel image */ +static u32 starfire_get_time(void) +{ + static char obp_gettod[32]; + static u32 unix_tod; + + sprintf(obp_gettod, "h# %08x unix-gettod", + (unsigned int) (long) &unix_tod); + prom_feval(obp_gettod); + + return unix_tod; +} + +static int starfire_set_time(u32 val) +{ + /* Do nothing, time is set using the service processor + * console on this platform. + */ + return 0; +} + +static u32 hypervisor_get_time(void) +{ + register unsigned long func asm("%o5"); + register unsigned long arg0 asm("%o0"); + register unsigned long arg1 asm("%o1"); + int retries = 10000; + +retry: + func = HV_FAST_TOD_GET; + arg0 = 0; + arg1 = 0; + __asm__ __volatile__("ta %6" + : "=&r" (func), "=&r" (arg0), "=&r" (arg1) + : "0" (func), "1" (arg0), "2" (arg1), + "i" (HV_FAST_TRAP)); + if (arg0 == HV_EOK) + return arg1; + if (arg0 == HV_EWOULDBLOCK) { + if (--retries > 0) { + udelay(100); + goto retry; + } + printk(KERN_WARNING "SUN4V: tod_get() timed out.\n"); + return 0; + } + printk(KERN_WARNING "SUN4V: tod_get() not supported.\n"); + return 0; +} + +static int hypervisor_set_time(u32 secs) +{ + register unsigned long func asm("%o5"); + register unsigned long arg0 asm("%o0"); + int retries = 10000; + +retry: + func = HV_FAST_TOD_SET; + arg0 = secs; + __asm__ __volatile__("ta %4" + : "=&r" (func), "=&r" (arg0) + : "0" (func), "1" (arg0), + "i" (HV_FAST_TRAP)); + if (arg0 == HV_EOK) + return 0; + if (arg0 == HV_EWOULDBLOCK) { + if (--retries > 0) { + udelay(100); + goto retry; + } + printk(KERN_WARNING "SUN4V: tod_set() timed out.\n"); + return -EAGAIN; + } + printk(KERN_WARNING "SUN4V: tod_set() not supported.\n"); + return -EOPNOTSUPP; +} + void __init clock_probe(void) { struct linux_prom_registers clk_reg[2]; @@ -702,14 +774,14 @@ void __init clock_probe(void) if (this_is_starfire) { - /* davem suggests we keep this within the 4M locked kernel image */ - static char obp_gettod[256]; - static u32 unix_tod; - - sprintf(obp_gettod, "h# %08x unix-gettod", - (unsigned int) (long) &unix_tod); - prom_feval(obp_gettod); - xtime.tv_sec = unix_tod; + xtime.tv_sec = starfire_get_time(); + xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ); + set_normalized_timespec(&wall_to_monotonic, + -xtime.tv_sec, -xtime.tv_nsec); + return; + } + if (tlb_type == hypervisor) { + xtime.tv_sec = hypervisor_get_time(); xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ); set_normalized_timespec(&wall_to_monotonic, -xtime.tv_sec, -xtime.tv_nsec); @@ -981,11 +1053,10 @@ static void sparc64_start_timers(irqreturn_t (*cfunc)(int, void *, struct pt_reg } struct freq_table { - unsigned long udelay_val_ref; unsigned long clock_tick_ref; unsigned int ref_freq; }; -static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0, 0 }; +static DEFINE_PER_CPU(struct freq_table, sparc64_freq_table) = { 0, 0 }; unsigned long sparc64_get_clock_tick(unsigned int cpu) { @@ -1007,16 +1078,11 @@ static int sparc64_cpufreq_notifier(struct notifier_block *nb, unsigned long val if (!ft->ref_freq) { ft->ref_freq = freq->old; - ft->udelay_val_ref = cpu_data(cpu).udelay_val; ft->clock_tick_ref = cpu_data(cpu).clock_tick; } if ((val == CPUFREQ_PRECHANGE && freq->old < freq->new) || (val == CPUFREQ_POSTCHANGE && freq->old > freq->new) || (val == CPUFREQ_RESUMECHANGE)) { - cpu_data(cpu).udelay_val = - cpufreq_scale(ft->udelay_val_ref, - ft->ref_freq, - freq->new); cpu_data(cpu).clock_tick = cpufreq_scale(ft->clock_tick_ref, ft->ref_freq, @@ -1179,3 +1245,246 @@ static int set_rtc_mmss(unsigned long nowtime) return retval; } } + +#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */ +static unsigned char mini_rtc_status; /* bitmapped status byte. */ + +/* months start at 0 now */ +static unsigned char days_in_mo[] = +{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; + +#define FEBRUARY 2 +#define STARTOFTIME 1970 +#define SECDAY 86400L +#define SECYR (SECDAY * 365) +#define leapyear(year) ((year) % 4 == 0 && \ + ((year) % 100 != 0 || (year) % 400 == 0)) +#define days_in_year(a) (leapyear(a) ? 366 : 365) +#define days_in_month(a) (month_days[(a) - 1]) + +static int month_days[12] = { + 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 +}; + +/* + * This only works for the Gregorian calendar - i.e. after 1752 (in the UK) + */ +static void GregorianDay(struct rtc_time * tm) +{ + int leapsToDate; + int lastYear; + int day; + int MonthOffset[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; + + lastYear = tm->tm_year - 1; + + /* + * Number of leap corrections to apply up to end of last year + */ + leapsToDate = lastYear / 4 - lastYear / 100 + lastYear / 400; + + /* + * This year is a leap year if it is divisible by 4 except when it is + * divisible by 100 unless it is divisible by 400 + * + * e.g. 1904 was a leap year, 1900 was not, 1996 is, and 2000 was + */ + day = tm->tm_mon > 2 && leapyear(tm->tm_year); + + day += lastYear*365 + leapsToDate + MonthOffset[tm->tm_mon-1] + + tm->tm_mday; + + tm->tm_wday = day % 7; +} + +static void to_tm(int tim, struct rtc_time *tm) +{ + register int i; + register long hms, day; + + day = tim / SECDAY; + hms = tim % SECDAY; + + /* Hours, minutes, seconds are easy */ + tm->tm_hour = hms / 3600; + tm->tm_min = (hms % 3600) / 60; + tm->tm_sec = (hms % 3600) % 60; + + /* Number of years in days */ + for (i = STARTOFTIME; day >= days_in_year(i); i++) + day -= days_in_year(i); + tm->tm_year = i; + + /* Number of months in days left */ + if (leapyear(tm->tm_year)) + days_in_month(FEBRUARY) = 29; + for (i = 1; day >= days_in_month(i); i++) + day -= days_in_month(i); + days_in_month(FEBRUARY) = 28; + tm->tm_mon = i; + + /* Days are what is left over (+1) from all that. */ + tm->tm_mday = day + 1; + + /* + * Determine the day of week + */ + GregorianDay(tm); +} + +/* Both Starfire and SUN4V give us seconds since Jan 1st, 1970, + * aka Unix time. So we have to convert to/from rtc_time. + */ +static inline void mini_get_rtc_time(struct rtc_time *time) +{ + unsigned long flags; + u32 seconds; + + spin_lock_irqsave(&rtc_lock, flags); + seconds = 0; + if (this_is_starfire) + seconds = starfire_get_time(); + else if (tlb_type == hypervisor) + seconds = hypervisor_get_time(); + spin_unlock_irqrestore(&rtc_lock, flags); + + to_tm(seconds, time); + time->tm_year -= 1900; + time->tm_mon -= 1; +} + +static inline int mini_set_rtc_time(struct rtc_time *time) +{ + u32 seconds = mktime(time->tm_year + 1900, time->tm_mon + 1, + time->tm_mday, time->tm_hour, + time->tm_min, time->tm_sec); + unsigned long flags; + int err; + + spin_lock_irqsave(&rtc_lock, flags); + err = -ENODEV; + if (this_is_starfire) + err = starfire_set_time(seconds); + else if (tlb_type == hypervisor) + err = hypervisor_set_time(seconds); + spin_unlock_irqrestore(&rtc_lock, flags); + + return err; +} + +static int mini_rtc_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + struct rtc_time wtime; + void __user *argp = (void __user *)arg; + + switch (cmd) { + + case RTC_PLL_GET: + return -EINVAL; + + case RTC_PLL_SET: + return -EINVAL; + + case RTC_UIE_OFF: /* disable ints from RTC updates. */ + return 0; + + case RTC_UIE_ON: /* enable ints for RTC updates. */ + return -EINVAL; + + case RTC_RD_TIME: /* Read the time/date from RTC */ + /* this doesn't get week-day, who cares */ + memset(&wtime, 0, sizeof(wtime)); + mini_get_rtc_time(&wtime); + + return copy_to_user(argp, &wtime, sizeof(wtime)) ? -EFAULT : 0; + + case RTC_SET_TIME: /* Set the RTC */ + { + int year; + unsigned char leap_yr; + + if (!capable(CAP_SYS_TIME)) + return -EACCES; + + if (copy_from_user(&wtime, argp, sizeof(wtime))) + return -EFAULT; + + year = wtime.tm_year + 1900; + leap_yr = ((!(year % 4) && (year % 100)) || + !(year % 400)); + + if ((wtime.tm_mon < 0 || wtime.tm_mon > 11) || (wtime.tm_mday < 1)) + return -EINVAL; + + if (wtime.tm_mday < 0 || wtime.tm_mday > + (days_in_mo[wtime.tm_mon] + ((wtime.tm_mon == 1) && leap_yr))) + return -EINVAL; + + if (wtime.tm_hour < 0 || wtime.tm_hour >= 24 || + wtime.tm_min < 0 || wtime.tm_min >= 60 || + wtime.tm_sec < 0 || wtime.tm_sec >= 60) + return -EINVAL; + + return mini_set_rtc_time(&wtime); + } + } + + return -EINVAL; +} + +static int mini_rtc_open(struct inode *inode, struct file *file) +{ + if (mini_rtc_status & RTC_IS_OPEN) + return -EBUSY; + + mini_rtc_status |= RTC_IS_OPEN; + + return 0; +} + +static int mini_rtc_release(struct inode *inode, struct file *file) +{ + mini_rtc_status &= ~RTC_IS_OPEN; + return 0; +} + + +static struct file_operations mini_rtc_fops = { + .owner = THIS_MODULE, + .ioctl = mini_rtc_ioctl, + .open = mini_rtc_open, + .release = mini_rtc_release, +}; + +static struct miscdevice rtc_mini_dev = +{ + .minor = RTC_MINOR, + .name = "rtc", + .fops = &mini_rtc_fops, +}; + +static int __init rtc_mini_init(void) +{ + int retval; + + if (tlb_type != hypervisor && !this_is_starfire) + return -ENODEV; + + printk(KERN_INFO "Mini RTC Driver\n"); + + retval = misc_register(&rtc_mini_dev); + if (retval < 0) + return retval; + + return 0; +} + +static void __exit rtc_mini_exit(void) +{ + misc_deregister(&rtc_mini_dev); +} + + +module_init(rtc_mini_init); +module_exit(rtc_mini_exit); diff --git a/arch/sparc64/kernel/trampoline.S b/arch/sparc64/kernel/trampoline.S index 9478551cb02..a4dc01a3d23 100644 --- a/arch/sparc64/kernel/trampoline.S +++ b/arch/sparc64/kernel/trampoline.S @@ -16,6 +16,8 @@ #include <asm/processor.h> #include <asm/thread_info.h> #include <asm/mmu.h> +#include <asm/hypervisor.h> +#include <asm/cpudata.h> .data .align 8 @@ -28,14 +30,19 @@ itlb_load: dtlb_load: .asciz "SUNW,dtlb-load" + /* XXX __cpuinit this thing XXX */ +#define TRAMP_STACK_SIZE 1024 + .align 16 +tramp_stack: + .skip TRAMP_STACK_SIZE + .text .align 8 .globl sparc64_cpu_startup, sparc64_cpu_startup_end sparc64_cpu_startup: - flushw - - BRANCH_IF_CHEETAH_BASE(g1,g5,cheetah_startup) - BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g5,cheetah_plus_startup) + BRANCH_IF_SUN4V(g1, niagara_startup) + BRANCH_IF_CHEETAH_BASE(g1, g5, cheetah_startup) + BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1, g5, cheetah_plus_startup) ba,pt %xcc, spitfire_startup nop @@ -55,6 +62,7 @@ cheetah_startup: or %g5, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g5 stxa %g5, [%g0] ASI_DCU_CONTROL_REG membar #Sync + /* fallthru */ cheetah_generic_startup: mov TSB_EXTENSION_P, %g3 @@ -70,7 +78,9 @@ cheetah_generic_startup: stxa %g0, [%g3] ASI_DMMU stxa %g0, [%g3] ASI_IMMU membar #Sync + /* fallthru */ +niagara_startup: /* Disable STICK_INT interrupts. */ sethi %hi(0x80000000), %g5 sllx %g5, 32, %g5 @@ -85,17 +95,17 @@ spitfire_startup: membar #Sync startup_continue: - wrpr %g0, 15, %pil - sethi %hi(0x80000000), %g2 sllx %g2, 32, %g2 wr %g2, 0, %tick_cmpr + mov %o0, %l0 + + BRANCH_IF_SUN4V(g1, niagara_lock_tlb) + /* Call OBP by hand to lock KERNBASE into i/d tlbs. * We lock 2 consequetive entries if we are 'bigkernel'. */ - mov %o0, %l0 - sethi %hi(prom_entry_lock), %g2 1: ldstub [%g2 + %lo(prom_entry_lock)], %g1 membar #StoreLoad | #StoreStore @@ -105,7 +115,6 @@ startup_continue: sethi %hi(p1275buf), %g2 or %g2, %lo(p1275buf), %g2 ldx [%g2 + 0x10], %l2 - mov %sp, %l1 add %l2, -(192 + 128), %sp flushw @@ -142,8 +151,7 @@ startup_continue: sethi %hi(bigkernel), %g2 lduw [%g2 + %lo(bigkernel)], %g2 - cmp %g2, 0 - be,pt %icc, do_dtlb + brz,pt %g2, do_dtlb nop sethi %hi(call_method), %g2 @@ -214,8 +222,7 @@ do_dtlb: sethi %hi(bigkernel), %g2 lduw [%g2 + %lo(bigkernel)], %g2 - cmp %g2, 0 - be,pt %icc, do_unlock + brz,pt %g2, do_unlock nop sethi %hi(call_method), %g2 @@ -257,99 +264,180 @@ do_unlock: stb %g0, [%g2 + %lo(prom_entry_lock)] membar #StoreStore | #StoreLoad - mov %l1, %sp - flushw + ba,pt %xcc, after_lock_tlb + nop + +niagara_lock_tlb: + mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 + sethi %hi(KERNBASE), %o0 + clr %o1 + sethi %hi(kern_locked_tte_data), %o2 + ldx [%o2 + %lo(kern_locked_tte_data)], %o2 + mov HV_MMU_IMMU, %o3 + ta HV_FAST_TRAP + + mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 + sethi %hi(KERNBASE), %o0 + clr %o1 + sethi %hi(kern_locked_tte_data), %o2 + ldx [%o2 + %lo(kern_locked_tte_data)], %o2 + mov HV_MMU_DMMU, %o3 + ta HV_FAST_TRAP - mov %l0, %o0 + sethi %hi(bigkernel), %g2 + lduw [%g2 + %lo(bigkernel)], %g2 + brz,pt %g2, after_lock_tlb + nop + mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 + sethi %hi(KERNBASE + 0x400000), %o0 + clr %o1 + sethi %hi(kern_locked_tte_data), %o2 + ldx [%o2 + %lo(kern_locked_tte_data)], %o2 + sethi %hi(0x400000), %o3 + add %o2, %o3, %o2 + mov HV_MMU_IMMU, %o3 + ta HV_FAST_TRAP + + mov HV_FAST_MMU_MAP_PERM_ADDR, %o5 + sethi %hi(KERNBASE + 0x400000), %o0 + clr %o1 + sethi %hi(kern_locked_tte_data), %o2 + ldx [%o2 + %lo(kern_locked_tte_data)], %o2 + sethi %hi(0x400000), %o3 + add %o2, %o3, %o2 + mov HV_MMU_DMMU, %o3 + ta HV_FAST_TRAP + +after_lock_tlb: wrpr %g0, (PSTATE_PRIV | PSTATE_PEF), %pstate wr %g0, 0, %fprs - /* XXX Buggy PROM... */ - srl %o0, 0, %o0 - ldx [%o0], %g6 - wr %g0, ASI_P, %asi mov PRIMARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU + +661: stxa %g0, [%g7] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g0, [%g7] ASI_MMU + .previous + membar #Sync mov SECONDARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU + +661: stxa %g0, [%g7] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g0, [%g7] ASI_MMU + .previous + membar #Sync - mov 1, %g5 - sllx %g5, THREAD_SHIFT, %g5 - sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5 - add %g6, %g5, %sp + /* Everything we do here, until we properly take over the + * trap table, must be done with extreme care. We cannot + * make any references to %g6 (current thread pointer), + * %g4 (current task pointer), or %g5 (base of current cpu's + * per-cpu area) until we properly take over the trap table + * from the firmware and hypervisor. + * + * Get onto temporary stack which is in the locked kernel image. + */ + sethi %hi(tramp_stack), %g1 + or %g1, %lo(tramp_stack), %g1 + add %g1, TRAMP_STACK_SIZE, %g1 + sub %g1, STACKFRAME_SZ + STACK_BIAS, %sp mov 0, %fp - wrpr %g0, 0, %wstate - wrpr %g0, 0, %tl + /* Put garbage in these registers to trap any access to them. */ + set 0xdeadbeef, %g4 + set 0xdeadbeef, %g5 + set 0xdeadbeef, %g6 - /* Setup the trap globals, then we can resurface. */ - rdpr %pstate, %o1 - mov %g6, %o2 - wrpr %o1, PSTATE_AG, %pstate - sethi %hi(sparc64_ttable_tl0), %g5 - wrpr %g5, %tba - mov %o2, %g6 - - wrpr %o1, PSTATE_MG, %pstate -#define KERN_HIGHBITS ((_PAGE_VALID|_PAGE_SZ4MB)^0xfffff80000000000) -#define KERN_LOWBITS (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W) - - mov TSB_REG, %g1 - stxa %g0, [%g1] ASI_DMMU - membar #Sync - mov TLB_SFSR, %g1 - sethi %uhi(KERN_HIGHBITS), %g2 - or %g2, %ulo(KERN_HIGHBITS), %g2 - sllx %g2, 32, %g2 - or %g2, KERN_LOWBITS, %g2 + call init_irqwork_curcpu + nop - BRANCH_IF_ANY_CHEETAH(g3,g7,9f) + sethi %hi(tlb_type), %g3 + lduw [%g3 + %lo(tlb_type)], %g2 + cmp %g2, 3 + bne,pt %icc, 1f + nop - ba,pt %xcc, 1f + call hard_smp_processor_id nop + + mov %o0, %o1 + mov 0, %o0 + mov 0, %o2 + call sun4v_init_mondo_queues + mov 1, %o3 -9: - sethi %uhi(VPTE_BASE_CHEETAH), %g3 - or %g3, %ulo(VPTE_BASE_CHEETAH), %g3 - ba,pt %xcc, 2f - sllx %g3, 32, %g3 -1: - sethi %uhi(VPTE_BASE_SPITFIRE), %g3 - or %g3, %ulo(VPTE_BASE_SPITFIRE), %g3 - sllx %g3, 32, %g3 +1: call init_cur_cpu_trap + ldx [%l0], %o0 + + /* Start using proper page size encodings in ctx register. */ + sethi %hi(sparc64_kern_pri_context), %g3 + ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 + mov PRIMARY_CONTEXT, %g1 -2: - clr %g7 -#undef KERN_HIGHBITS -#undef KERN_LOWBITS +661: stxa %g2, [%g1] ASI_DMMU + .section .sun4v_1insn_patch, "ax" + .word 661b + stxa %g2, [%g1] ASI_MMU + .previous - wrpr %o1, 0x0, %pstate - ldx [%g6 + TI_TASK], %g4 + membar #Sync wrpr %g0, 0, %wstate - call init_irqwork_curcpu + /* As a hack, put &init_thread_union into %g6. + * prom_world() loads from here to restore the %asi + * register. + */ + sethi %hi(init_thread_union), %g6 + or %g6, %lo(init_thread_union), %g6 + + sethi %hi(is_sun4v), %o0 + lduw [%o0 + %lo(is_sun4v)], %o0 + brz,pt %o0, 1f nop - /* Start using proper page size encodings in ctx register. */ - sethi %hi(sparc64_kern_pri_context), %g3 - ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 - mov PRIMARY_CONTEXT, %g1 - stxa %g2, [%g1] ASI_DMMU - membar #Sync + TRAP_LOAD_TRAP_BLOCK(%g2, %g3) + add %g2, TRAP_PER_CPU_FAULT_INFO, %g2 + stxa %g2, [%g0] ASI_SCRATCHPAD + + /* Compute physical address: + * + * paddr = kern_base + (mmfsa_vaddr - KERNBASE) + */ + sethi %hi(KERNBASE), %g3 + sub %g2, %g3, %g2 + sethi %hi(kern_base), %g3 + ldx [%g3 + %lo(kern_base)], %g3 + add %g2, %g3, %o1 + + call prom_set_trap_table_sun4v + sethi %hi(sparc64_ttable_tl0), %o0 + + ba,pt %xcc, 2f + nop + +1: call prom_set_trap_table + sethi %hi(sparc64_ttable_tl0), %o0 + +2: ldx [%l0], %g6 + ldx [%g6 + TI_TASK], %g4 + + mov 1, %g5 + sllx %g5, THREAD_SHIFT, %g5 + sub %g5, (STACKFRAME_SZ + STACK_BIAS), %g5 + add %g6, %g5, %sp + mov 0, %fp rdpr %pstate, %o1 or %o1, PSTATE_IE, %o1 wrpr %o1, 0, %pstate - call prom_set_trap_table - sethi %hi(sparc64_ttable_tl0), %o0 - call smp_callin nop call cpu_idle diff --git a/arch/sparc64/kernel/traps.c b/arch/sparc64/kernel/traps.c index 8d44ae5a15e..ff090bb9734 100644 --- a/arch/sparc64/kernel/traps.c +++ b/arch/sparc64/kernel/traps.c @@ -38,22 +38,24 @@ #include <asm/processor.h> #include <asm/timer.h> #include <asm/kdebug.h> +#include <asm/head.h> #ifdef CONFIG_KMOD #include <linux/kmod.h> #endif -struct notifier_block *sparc64die_chain; -static DEFINE_SPINLOCK(die_notifier_lock); +ATOMIC_NOTIFIER_HEAD(sparc64die_chain); int register_die_notifier(struct notifier_block *nb) { - int err = 0; - unsigned long flags; - spin_lock_irqsave(&die_notifier_lock, flags); - err = notifier_chain_register(&sparc64die_chain, nb); - spin_unlock_irqrestore(&die_notifier_lock, flags); - return err; + return atomic_notifier_chain_register(&sparc64die_chain, nb); } +EXPORT_SYMBOL(register_die_notifier); + +int unregister_die_notifier(struct notifier_block *nb) +{ + return atomic_notifier_chain_unregister(&sparc64die_chain, nb); +} +EXPORT_SYMBOL(unregister_die_notifier); /* When an irrecoverable trap occurs at tl > 0, the trap entry * code logs the trap state registers at every level in the trap @@ -72,12 +74,14 @@ struct tl1_traplog { static void dump_tl1_traplog(struct tl1_traplog *p) { - int i; + int i, limit; + + printk(KERN_EMERG "TRAPLOG: Error at trap level 0x%lx, " + "dumping track stack.\n", p->tl); - printk("TRAPLOG: Error at trap level 0x%lx, dumping track stack.\n", - p->tl); - for (i = 0; i < 4; i++) { - printk(KERN_CRIT + limit = (tlb_type == hypervisor) ? 2 : 4; + for (i = 0; i < limit; i++) { + printk(KERN_EMERG "TRAPLOG: Trap level %d TSTATE[%016lx] TPC[%016lx] " "TNPC[%016lx] TT[%lx]\n", i + 1, @@ -179,6 +183,45 @@ void spitfire_insn_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr spitfire_insn_access_exception(regs, sfsr, sfar); } +void sun4v_insn_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) +{ + unsigned short type = (type_ctx >> 16); + unsigned short ctx = (type_ctx & 0xffff); + siginfo_t info; + + if (notify_die(DIE_TRAP, "instruction access exception", regs, + 0, 0x8, SIGTRAP) == NOTIFY_STOP) + return; + + if (regs->tstate & TSTATE_PRIV) { + printk("sun4v_insn_access_exception: ADDR[%016lx] " + "CTX[%04x] TYPE[%04x], going.\n", + addr, ctx, type); + die_if_kernel("Iax", regs); + } + + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = SEGV_MAPERR; + info.si_addr = (void __user *) addr; + info.si_trapno = 0; + force_sig_info(SIGSEGV, &info, current); +} + +void sun4v_insn_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) +{ + if (notify_die(DIE_TRAP_TL1, "instruction access exception tl1", regs, + 0, 0x8, SIGTRAP) == NOTIFY_STOP) + return; + + dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); + sun4v_insn_access_exception(regs, addr, type_ctx); +} + void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar) { siginfo_t info; @@ -227,6 +270,45 @@ void spitfire_data_access_exception_tl1(struct pt_regs *regs, unsigned long sfsr spitfire_data_access_exception(regs, sfsr, sfar); } +void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) +{ + unsigned short type = (type_ctx >> 16); + unsigned short ctx = (type_ctx & 0xffff); + siginfo_t info; + + if (notify_die(DIE_TRAP, "data access exception", regs, + 0, 0x8, SIGTRAP) == NOTIFY_STOP) + return; + + if (regs->tstate & TSTATE_PRIV) { + printk("sun4v_data_access_exception: ADDR[%016lx] " + "CTX[%04x] TYPE[%04x], going.\n", + addr, ctx, type); + die_if_kernel("Dax", regs); + } + + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + info.si_signo = SIGSEGV; + info.si_errno = 0; + info.si_code = SEGV_MAPERR; + info.si_addr = (void __user *) addr; + info.si_trapno = 0; + force_sig_info(SIGSEGV, &info, current); +} + +void sun4v_data_access_exception_tl1(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) +{ + if (notify_die(DIE_TRAP_TL1, "data access exception tl1", regs, + 0, 0x8, SIGTRAP) == NOTIFY_STOP) + return; + + dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); + sun4v_data_access_exception(regs, addr, type_ctx); +} + #ifdef CONFIG_PCI /* This is really pathetic... */ extern volatile int pci_poke_in_progress; @@ -788,7 +870,8 @@ void __init cheetah_ecache_flush_init(void) cheetah_error_log[i].afsr = CHAFSR_INVALID; __asm__ ("rdpr %%ver, %0" : "=r" (ver)); - if ((ver >> 32) == 0x003e0016) { + if ((ver >> 32) == __JALAPENO_ID || + (ver >> 32) == __SERRANO_ID) { cheetah_error_table = &__jalapeno_error_table[0]; cheetah_afsr_errors = JPAFSR_ERRORS; } else if ((ver >> 32) == 0x003e0015) { @@ -1666,6 +1749,238 @@ void cheetah_plus_parity_error(int type, struct pt_regs *regs) regs->tpc); } +struct sun4v_error_entry { + u64 err_handle; + u64 err_stick; + + u32 err_type; +#define SUN4V_ERR_TYPE_UNDEFINED 0 +#define SUN4V_ERR_TYPE_UNCORRECTED_RES 1 +#define SUN4V_ERR_TYPE_PRECISE_NONRES 2 +#define SUN4V_ERR_TYPE_DEFERRED_NONRES 3 +#define SUN4V_ERR_TYPE_WARNING_RES 4 + + u32 err_attrs; +#define SUN4V_ERR_ATTRS_PROCESSOR 0x00000001 +#define SUN4V_ERR_ATTRS_MEMORY 0x00000002 +#define SUN4V_ERR_ATTRS_PIO 0x00000004 +#define SUN4V_ERR_ATTRS_INT_REGISTERS 0x00000008 +#define SUN4V_ERR_ATTRS_FPU_REGISTERS 0x00000010 +#define SUN4V_ERR_ATTRS_USER_MODE 0x01000000 +#define SUN4V_ERR_ATTRS_PRIV_MODE 0x02000000 +#define SUN4V_ERR_ATTRS_RES_QUEUE_FULL 0x80000000 + + u64 err_raddr; + u32 err_size; + u16 err_cpu; + u16 err_pad; +}; + +static atomic_t sun4v_resum_oflow_cnt = ATOMIC_INIT(0); +static atomic_t sun4v_nonresum_oflow_cnt = ATOMIC_INIT(0); + +static const char *sun4v_err_type_to_str(u32 type) +{ + switch (type) { + case SUN4V_ERR_TYPE_UNDEFINED: + return "undefined"; + case SUN4V_ERR_TYPE_UNCORRECTED_RES: + return "uncorrected resumable"; + case SUN4V_ERR_TYPE_PRECISE_NONRES: + return "precise nonresumable"; + case SUN4V_ERR_TYPE_DEFERRED_NONRES: + return "deferred nonresumable"; + case SUN4V_ERR_TYPE_WARNING_RES: + return "warning resumable"; + default: + return "unknown"; + }; +} + +static void sun4v_log_error(struct sun4v_error_entry *ent, int cpu, const char *pfx, atomic_t *ocnt) +{ + int cnt; + + printk("%s: Reporting on cpu %d\n", pfx, cpu); + printk("%s: err_handle[%lx] err_stick[%lx] err_type[%08x:%s]\n", + pfx, + ent->err_handle, ent->err_stick, + ent->err_type, + sun4v_err_type_to_str(ent->err_type)); + printk("%s: err_attrs[%08x:%s %s %s %s %s %s %s %s]\n", + pfx, + ent->err_attrs, + ((ent->err_attrs & SUN4V_ERR_ATTRS_PROCESSOR) ? + "processor" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_MEMORY) ? + "memory" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_PIO) ? + "pio" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_INT_REGISTERS) ? + "integer-regs" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_FPU_REGISTERS) ? + "fpu-regs" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_USER_MODE) ? + "user" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_PRIV_MODE) ? + "privileged" : ""), + ((ent->err_attrs & SUN4V_ERR_ATTRS_RES_QUEUE_FULL) ? + "queue-full" : "")); + printk("%s: err_raddr[%016lx] err_size[%u] err_cpu[%u]\n", + pfx, + ent->err_raddr, ent->err_size, ent->err_cpu); + + if ((cnt = atomic_read(ocnt)) != 0) { + atomic_set(ocnt, 0); + wmb(); + printk("%s: Queue overflowed %d times.\n", + pfx, cnt); + } +} + +/* We run with %pil set to 15 and PSTATE_IE enabled in %pstate. + * Log the event and clear the first word of the entry. + */ +void sun4v_resum_error(struct pt_regs *regs, unsigned long offset) +{ + struct sun4v_error_entry *ent, local_copy; + struct trap_per_cpu *tb; + unsigned long paddr; + int cpu; + + cpu = get_cpu(); + + tb = &trap_block[cpu]; + paddr = tb->resum_kernel_buf_pa + offset; + ent = __va(paddr); + + memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); + + /* We have a local copy now, so release the entry. */ + ent->err_handle = 0; + wmb(); + + put_cpu(); + + sun4v_log_error(&local_copy, cpu, + KERN_ERR "RESUMABLE ERROR", + &sun4v_resum_oflow_cnt); +} + +/* If we try to printk() we'll probably make matters worse, by trying + * to retake locks this cpu already holds or causing more errors. So + * just bump a counter, and we'll report these counter bumps above. + */ +void sun4v_resum_overflow(struct pt_regs *regs) +{ + atomic_inc(&sun4v_resum_oflow_cnt); +} + +/* We run with %pil set to 15 and PSTATE_IE enabled in %pstate. + * Log the event, clear the first word of the entry, and die. + */ +void sun4v_nonresum_error(struct pt_regs *regs, unsigned long offset) +{ + struct sun4v_error_entry *ent, local_copy; + struct trap_per_cpu *tb; + unsigned long paddr; + int cpu; + + cpu = get_cpu(); + + tb = &trap_block[cpu]; + paddr = tb->nonresum_kernel_buf_pa + offset; + ent = __va(paddr); + + memcpy(&local_copy, ent, sizeof(struct sun4v_error_entry)); + + /* We have a local copy now, so release the entry. */ + ent->err_handle = 0; + wmb(); + + put_cpu(); + +#ifdef CONFIG_PCI + /* Check for the special PCI poke sequence. */ + if (pci_poke_in_progress && pci_poke_cpu == cpu) { + pci_poke_faulted = 1; + regs->tpc += 4; + regs->tnpc = regs->tpc + 4; + return; + } +#endif + + sun4v_log_error(&local_copy, cpu, + KERN_EMERG "NON-RESUMABLE ERROR", + &sun4v_nonresum_oflow_cnt); + + panic("Non-resumable error."); +} + +/* If we try to printk() we'll probably make matters worse, by trying + * to retake locks this cpu already holds or causing more errors. So + * just bump a counter, and we'll report these counter bumps above. + */ +void sun4v_nonresum_overflow(struct pt_regs *regs) +{ + /* XXX Actually even this can make not that much sense. Perhaps + * XXX we should just pull the plug and panic directly from here? + */ + atomic_inc(&sun4v_nonresum_oflow_cnt); +} + +unsigned long sun4v_err_itlb_vaddr; +unsigned long sun4v_err_itlb_ctx; +unsigned long sun4v_err_itlb_pte; +unsigned long sun4v_err_itlb_error; + +void sun4v_itlb_error_report(struct pt_regs *regs, int tl) +{ + if (tl > 1) + dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); + + printk(KERN_EMERG "SUN4V-ITLB: Error at TPC[%lx], tl %d\n", + regs->tpc, tl); + printk(KERN_EMERG "SUN4V-ITLB: vaddr[%lx] ctx[%lx] " + "pte[%lx] error[%lx]\n", + sun4v_err_itlb_vaddr, sun4v_err_itlb_ctx, + sun4v_err_itlb_pte, sun4v_err_itlb_error); + + prom_halt(); +} + +unsigned long sun4v_err_dtlb_vaddr; +unsigned long sun4v_err_dtlb_ctx; +unsigned long sun4v_err_dtlb_pte; +unsigned long sun4v_err_dtlb_error; + +void sun4v_dtlb_error_report(struct pt_regs *regs, int tl) +{ + if (tl > 1) + dump_tl1_traplog((struct tl1_traplog *)(regs + 1)); + + printk(KERN_EMERG "SUN4V-DTLB: Error at TPC[%lx], tl %d\n", + regs->tpc, tl); + printk(KERN_EMERG "SUN4V-DTLB: vaddr[%lx] ctx[%lx] " + "pte[%lx] error[%lx]\n", + sun4v_err_dtlb_vaddr, sun4v_err_dtlb_ctx, + sun4v_err_dtlb_pte, sun4v_err_dtlb_error); + + prom_halt(); +} + +void hypervisor_tlbop_error(unsigned long err, unsigned long op) +{ + printk(KERN_CRIT "SUN4V: TLB hv call error %lu for op %lu\n", + err, op); +} + +void hypervisor_tlbop_error_xcall(unsigned long err, unsigned long op) +{ + printk(KERN_CRIT "SUN4V: XCALL TLB hv call error %lu for op %lu\n", + err, op); +} + void do_fpe_common(struct pt_regs *regs) { if (regs->tstate & TSTATE_PRIV) { @@ -1924,10 +2239,11 @@ void die_if_kernel(char *str, struct pt_regs *regs) } user_instruction_dump ((unsigned int __user *) regs->tpc); } +#if 0 #ifdef CONFIG_SMP smp_report_regs(); #endif - +#endif if (regs->tstate & TSTATE_PRIV) do_exit(SIGKILL); do_exit(SIGSEGV); @@ -1958,6 +2274,11 @@ void do_illegal_instruction(struct pt_regs *regs) } else if ((insn & 0xc1580000) == 0xc1100000) /* LDQ/STQ */ { if (handle_ldf_stq(insn, regs)) return; + } else if (tlb_type == hypervisor) { + extern int vis_emul(struct pt_regs *, unsigned int); + + if (!vis_emul(regs, insn)) + return; } } info.si_signo = SIGILL; @@ -1968,6 +2289,8 @@ void do_illegal_instruction(struct pt_regs *regs) force_sig_info(SIGILL, &info, current); } +extern void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn); + void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr) { siginfo_t info; @@ -1977,13 +2300,7 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo return; if (regs->tstate & TSTATE_PRIV) { - extern void kernel_unaligned_trap(struct pt_regs *regs, - unsigned int insn, - unsigned long sfar, - unsigned long sfsr); - - kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc), - sfar, sfsr); + kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); return; } info.si_signo = SIGBUS; @@ -1994,6 +2311,26 @@ void mem_address_unaligned(struct pt_regs *regs, unsigned long sfar, unsigned lo force_sig_info(SIGBUS, &info, current); } +void sun4v_do_mna(struct pt_regs *regs, unsigned long addr, unsigned long type_ctx) +{ + siginfo_t info; + + if (notify_die(DIE_TRAP, "memory address unaligned", regs, + 0, 0x34, SIGSEGV) == NOTIFY_STOP) + return; + + if (regs->tstate & TSTATE_PRIV) { + kernel_unaligned_trap(regs, *((unsigned int *)regs->tpc)); + return; + } + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_ADRALN; + info.si_addr = (void __user *) addr; + info.si_trapno = 0; + force_sig_info(SIGBUS, &info, current); +} + void do_privop(struct pt_regs *regs) { siginfo_t info; @@ -2130,7 +2467,23 @@ void do_getpsr(struct pt_regs *regs) } } +struct trap_per_cpu trap_block[NR_CPUS]; + +/* This can get invoked before sched_init() so play it super safe + * and use hard_smp_processor_id(). + */ +void init_cur_cpu_trap(struct thread_info *t) +{ + int cpu = hard_smp_processor_id(); + struct trap_per_cpu *p = &trap_block[cpu]; + + p->thread = t; + p->pgd_paddr = 0; +} + extern void thread_info_offsets_are_bolixed_dave(void); +extern void trap_per_cpu_offsets_are_bolixed_dave(void); +extern void tsb_config_offsets_are_bolixed_dave(void); /* Only invoked on boot processor. */ void __init trap_init(void) @@ -2154,7 +2507,6 @@ void __init trap_init(void) TI_KERN_CNTD0 != offsetof(struct thread_info, kernel_cntd0) || TI_KERN_CNTD1 != offsetof(struct thread_info, kernel_cntd1) || TI_PCR != offsetof(struct thread_info, pcr_reg) || - TI_CEE_STUFF != offsetof(struct thread_info, cee_stuff) || TI_PRE_COUNT != offsetof(struct thread_info, preempt_count) || TI_NEW_CHILD != offsetof(struct thread_info, new_child) || TI_SYS_NOERROR != offsetof(struct thread_info, syscall_noerror) || @@ -2165,6 +2517,47 @@ void __init trap_init(void) (TI_FPREGS & (64 - 1))) thread_info_offsets_are_bolixed_dave(); + if (TRAP_PER_CPU_THREAD != offsetof(struct trap_per_cpu, thread) || + (TRAP_PER_CPU_PGD_PADDR != + offsetof(struct trap_per_cpu, pgd_paddr)) || + (TRAP_PER_CPU_CPU_MONDO_PA != + offsetof(struct trap_per_cpu, cpu_mondo_pa)) || + (TRAP_PER_CPU_DEV_MONDO_PA != + offsetof(struct trap_per_cpu, dev_mondo_pa)) || + (TRAP_PER_CPU_RESUM_MONDO_PA != + offsetof(struct trap_per_cpu, resum_mondo_pa)) || + (TRAP_PER_CPU_RESUM_KBUF_PA != + offsetof(struct trap_per_cpu, resum_kernel_buf_pa)) || + (TRAP_PER_CPU_NONRESUM_MONDO_PA != + offsetof(struct trap_per_cpu, nonresum_mondo_pa)) || + (TRAP_PER_CPU_NONRESUM_KBUF_PA != + offsetof(struct trap_per_cpu, nonresum_kernel_buf_pa)) || + (TRAP_PER_CPU_FAULT_INFO != + offsetof(struct trap_per_cpu, fault_info)) || + (TRAP_PER_CPU_CPU_MONDO_BLOCK_PA != + offsetof(struct trap_per_cpu, cpu_mondo_block_pa)) || + (TRAP_PER_CPU_CPU_LIST_PA != + offsetof(struct trap_per_cpu, cpu_list_pa)) || + (TRAP_PER_CPU_TSB_HUGE != + offsetof(struct trap_per_cpu, tsb_huge)) || + (TRAP_PER_CPU_TSB_HUGE_TEMP != + offsetof(struct trap_per_cpu, tsb_huge_temp))) + trap_per_cpu_offsets_are_bolixed_dave(); + + if ((TSB_CONFIG_TSB != + offsetof(struct tsb_config, tsb)) || + (TSB_CONFIG_RSS_LIMIT != + offsetof(struct tsb_config, tsb_rss_limit)) || + (TSB_CONFIG_NENTRIES != + offsetof(struct tsb_config, tsb_nentries)) || + (TSB_CONFIG_REG_VAL != + offsetof(struct tsb_config, tsb_reg_val)) || + (TSB_CONFIG_MAP_VADDR != + offsetof(struct tsb_config, tsb_map_vaddr)) || + (TSB_CONFIG_MAP_PTE != + offsetof(struct tsb_config, tsb_map_pte))) + tsb_config_offsets_are_bolixed_dave(); + /* Attach to the address space of init_task. On SMP we * do this in smp.c:smp_callin for other cpus. */ diff --git a/arch/sparc64/kernel/tsb.S b/arch/sparc64/kernel/tsb.S new file mode 100644 index 00000000000..a0c8ba58920 --- /dev/null +++ b/arch/sparc64/kernel/tsb.S @@ -0,0 +1,552 @@ +/* tsb.S: Sparc64 TSB table handling. + * + * Copyright (C) 2006 David S. Miller <davem@davemloft.net> + */ + +#include <linux/config.h> + +#include <asm/tsb.h> +#include <asm/hypervisor.h> +#include <asm/page.h> +#include <asm/cpudata.h> +#include <asm/mmu.h> + + .text + .align 32 + + /* Invoked from TLB miss handler, we are in the + * MMU global registers and they are setup like + * this: + * + * %g1: TSB entry pointer + * %g2: available temporary + * %g3: FAULT_CODE_{D,I}TLB + * %g4: available temporary + * %g5: available temporary + * %g6: TAG TARGET + * %g7: available temporary, will be loaded by us with + * the physical address base of the linux page + * tables for the current address space + */ +tsb_miss_dtlb: + mov TLB_TAG_ACCESS, %g4 + ba,pt %xcc, tsb_miss_page_table_walk + ldxa [%g4] ASI_DMMU, %g4 + +tsb_miss_itlb: + mov TLB_TAG_ACCESS, %g4 + ba,pt %xcc, tsb_miss_page_table_walk + ldxa [%g4] ASI_IMMU, %g4 + + /* At this point we have: + * %g1 -- PAGE_SIZE TSB entry address + * %g3 -- FAULT_CODE_{D,I}TLB + * %g4 -- missing virtual address + * %g6 -- TAG TARGET (vaddr >> 22) + */ +tsb_miss_page_table_walk: + TRAP_LOAD_TRAP_BLOCK(%g7, %g5) + + /* Before committing to a full page table walk, + * check the huge page TSB. + */ +#ifdef CONFIG_HUGETLB_PAGE + +661: ldx [%g7 + TRAP_PER_CPU_TSB_HUGE], %g5 + nop + .section .sun4v_2insn_patch, "ax" + .word 661b + mov SCRATCHPAD_UTSBREG2, %g5 + ldxa [%g5] ASI_SCRATCHPAD, %g5 + .previous + + cmp %g5, -1 + be,pt %xcc, 80f + nop + + /* We need an aligned pair of registers containing 2 values + * which can be easily rematerialized. %g6 and %g7 foot the + * bill just nicely. We'll save %g6 away into %g2 for the + * huge page TSB TAG comparison. + * + * Perform a huge page TSB lookup. + */ + mov %g6, %g2 + and %g5, 0x7, %g6 + mov 512, %g7 + andn %g5, 0x7, %g5 + sllx %g7, %g6, %g7 + srlx %g4, HPAGE_SHIFT, %g6 + sub %g7, 1, %g7 + and %g6, %g7, %g6 + sllx %g6, 4, %g6 + add %g5, %g6, %g5 + + TSB_LOAD_QUAD(%g5, %g6) + cmp %g6, %g2 + be,a,pt %xcc, tsb_tlb_reload + mov %g7, %g5 + + /* No match, remember the huge page TSB entry address, + * and restore %g6 and %g7. + */ + TRAP_LOAD_TRAP_BLOCK(%g7, %g6) + srlx %g4, 22, %g6 +80: stx %g5, [%g7 + TRAP_PER_CPU_TSB_HUGE_TEMP] + +#endif + + ldx [%g7 + TRAP_PER_CPU_PGD_PADDR], %g7 + + /* At this point we have: + * %g1 -- TSB entry address + * %g3 -- FAULT_CODE_{D,I}TLB + * %g4 -- missing virtual address + * %g6 -- TAG TARGET (vaddr >> 22) + * %g7 -- page table physical address + * + * We know that both the base PAGE_SIZE TSB and the HPAGE_SIZE + * TSB both lack a matching entry. + */ +tsb_miss_page_table_walk_sun4v_fastpath: + USER_PGTABLE_WALK_TL1(%g4, %g7, %g5, %g2, tsb_do_fault) + + /* Load and check PTE. */ + ldxa [%g5] ASI_PHYS_USE_EC, %g5 + brgez,pn %g5, tsb_do_fault + nop + +#ifdef CONFIG_HUGETLB_PAGE +661: sethi %uhi(_PAGE_SZALL_4U), %g7 + sllx %g7, 32, %g7 + .section .sun4v_2insn_patch, "ax" + .word 661b + mov _PAGE_SZALL_4V, %g7 + nop + .previous + + and %g5, %g7, %g2 + +661: sethi %uhi(_PAGE_SZHUGE_4U), %g7 + sllx %g7, 32, %g7 + .section .sun4v_2insn_patch, "ax" + .word 661b + mov _PAGE_SZHUGE_4V, %g7 + nop + .previous + + cmp %g2, %g7 + bne,pt %xcc, 60f + nop + + /* It is a huge page, use huge page TSB entry address we + * calculated above. + */ + TRAP_LOAD_TRAP_BLOCK(%g7, %g2) + ldx [%g7 + TRAP_PER_CPU_TSB_HUGE_TEMP], %g2 + cmp %g2, -1 + movne %xcc, %g2, %g1 +60: +#endif + + /* At this point we have: + * %g1 -- TSB entry address + * %g3 -- FAULT_CODE_{D,I}TLB + * %g5 -- valid PTE + * %g6 -- TAG TARGET (vaddr >> 22) + */ +tsb_reload: + TSB_LOCK_TAG(%g1, %g2, %g7) + TSB_WRITE(%g1, %g5, %g6) + + /* Finally, load TLB and return from trap. */ +tsb_tlb_reload: + cmp %g3, FAULT_CODE_DTLB + bne,pn %xcc, tsb_itlb_load + nop + +tsb_dtlb_load: + +661: stxa %g5, [%g0] ASI_DTLB_DATA_IN + retry + .section .sun4v_2insn_patch, "ax" + .word 661b + nop + nop + .previous + + /* For sun4v the ASI_DTLB_DATA_IN store and the retry + * instruction get nop'd out and we get here to branch + * to the sun4v tlb load code. The registers are setup + * as follows: + * + * %g4: vaddr + * %g5: PTE + * %g6: TAG + * + * The sun4v TLB load wants the PTE in %g3 so we fix that + * up here. + */ + ba,pt %xcc, sun4v_dtlb_load + mov %g5, %g3 + +tsb_itlb_load: + /* Executable bit must be set. */ +661: andcc %g5, _PAGE_EXEC_4U, %g0 + .section .sun4v_1insn_patch, "ax" + .word 661b + andcc %g5, _PAGE_EXEC_4V, %g0 + .previous + + be,pn %xcc, tsb_do_fault + nop + +661: stxa %g5, [%g0] ASI_ITLB_DATA_IN + retry + .section .sun4v_2insn_patch, "ax" + .word 661b + nop + nop + .previous + + /* For sun4v the ASI_ITLB_DATA_IN store and the retry + * instruction get nop'd out and we get here to branch + * to the sun4v tlb load code. The registers are setup + * as follows: + * + * %g4: vaddr + * %g5: PTE + * %g6: TAG + * + * The sun4v TLB load wants the PTE in %g3 so we fix that + * up here. + */ + ba,pt %xcc, sun4v_itlb_load + mov %g5, %g3 + + /* No valid entry in the page tables, do full fault + * processing. + */ + + .globl tsb_do_fault +tsb_do_fault: + cmp %g3, FAULT_CODE_DTLB + +661: rdpr %pstate, %g5 + wrpr %g5, PSTATE_AG | PSTATE_MG, %pstate + .section .sun4v_2insn_patch, "ax" + .word 661b + SET_GL(1) + ldxa [%g0] ASI_SCRATCHPAD, %g4 + .previous + + bne,pn %xcc, tsb_do_itlb_fault + nop + +tsb_do_dtlb_fault: + rdpr %tl, %g3 + cmp %g3, 1 + +661: mov TLB_TAG_ACCESS, %g4 + ldxa [%g4] ASI_DMMU, %g5 + .section .sun4v_2insn_patch, "ax" + .word 661b + ldx [%g4 + HV_FAULT_D_ADDR_OFFSET], %g5 + nop + .previous + + be,pt %xcc, sparc64_realfault_common + mov FAULT_CODE_DTLB, %g4 + ba,pt %xcc, winfix_trampoline + nop + +tsb_do_itlb_fault: + rdpr %tpc, %g5 + ba,pt %xcc, sparc64_realfault_common + mov FAULT_CODE_ITLB, %g4 + + .globl sparc64_realfault_common +sparc64_realfault_common: + /* fault code in %g4, fault address in %g5, etrap will + * preserve these two values in %l4 and %l5 respectively + */ + ba,pt %xcc, etrap ! Save trap state +1: rd %pc, %g7 ! ... + stb %l4, [%g6 + TI_FAULT_CODE] ! Save fault code + stx %l5, [%g6 + TI_FAULT_ADDR] ! Save fault address + call do_sparc64_fault ! Call fault handler + add %sp, PTREGS_OFF, %o0 ! Compute pt_regs arg + ba,pt %xcc, rtrap_clr_l6 ! Restore cpu state + nop ! Delay slot (fill me) + +winfix_trampoline: + rdpr %tpc, %g3 ! Prepare winfixup TNPC + or %g3, 0x7c, %g3 ! Compute branch offset + wrpr %g3, %tnpc ! Write it into TNPC + done ! Trap return + + /* Insert an entry into the TSB. + * + * %o0: TSB entry pointer (virt or phys address) + * %o1: tag + * %o2: pte + */ + .align 32 + .globl __tsb_insert +__tsb_insert: + rdpr %pstate, %o5 + wrpr %o5, PSTATE_IE, %pstate + TSB_LOCK_TAG(%o0, %g2, %g3) + TSB_WRITE(%o0, %o2, %o1) + wrpr %o5, %pstate + retl + nop + .size __tsb_insert, .-__tsb_insert + + /* Flush the given TSB entry if it has the matching + * tag. + * + * %o0: TSB entry pointer (virt or phys address) + * %o1: tag + */ + .align 32 + .globl tsb_flush + .type tsb_flush,#function +tsb_flush: + sethi %hi(TSB_TAG_LOCK_HIGH), %g2 +1: TSB_LOAD_TAG(%o0, %g1) + srlx %g1, 32, %o3 + andcc %o3, %g2, %g0 + bne,pn %icc, 1b + membar #LoadLoad + cmp %g1, %o1 + mov 1, %o3 + bne,pt %xcc, 2f + sllx %o3, TSB_TAG_INVALID_BIT, %o3 + TSB_CAS_TAG(%o0, %g1, %o3) + cmp %g1, %o3 + bne,pn %xcc, 1b + nop +2: retl + TSB_MEMBAR + .size tsb_flush, .-tsb_flush + + /* Reload MMU related context switch state at + * schedule() time. + * + * %o0: page table physical address + * %o1: TSB base config pointer + * %o2: TSB huge config pointer, or NULL if none + * %o3: Hypervisor TSB descriptor physical address + * + * We have to run this whole thing with interrupts + * disabled so that the current cpu doesn't change + * due to preemption. + */ + .align 32 + .globl __tsb_context_switch + .type __tsb_context_switch,#function +__tsb_context_switch: + rdpr %pstate, %g1 + wrpr %g1, PSTATE_IE, %pstate + + TRAP_LOAD_TRAP_BLOCK(%g2, %g3) + + stx %o0, [%g2 + TRAP_PER_CPU_PGD_PADDR] + + ldx [%o1 + TSB_CONFIG_REG_VAL], %o0 + brz,pt %o2, 1f + mov -1, %g3 + + ldx [%o2 + TSB_CONFIG_REG_VAL], %g3 + +1: stx %g3, [%g2 + TRAP_PER_CPU_TSB_HUGE] + + sethi %hi(tlb_type), %g2 + lduw [%g2 + %lo(tlb_type)], %g2 + cmp %g2, 3 + bne,pt %icc, 50f + nop + + /* Hypervisor TSB switch. */ + mov SCRATCHPAD_UTSBREG1, %o5 + stxa %o0, [%o5] ASI_SCRATCHPAD + mov SCRATCHPAD_UTSBREG2, %o5 + stxa %g3, [%o5] ASI_SCRATCHPAD + + mov 2, %o0 + cmp %g3, -1 + move %xcc, 1, %o0 + + mov HV_FAST_MMU_TSB_CTXNON0, %o5 + mov %o3, %o1 + ta HV_FAST_TRAP + + /* Finish up. */ + ba,pt %xcc, 9f + nop + + /* SUN4U TSB switch. */ +50: mov TSB_REG, %o5 + stxa %o0, [%o5] ASI_DMMU + membar #Sync + stxa %o0, [%o5] ASI_IMMU + membar #Sync + +2: ldx [%o1 + TSB_CONFIG_MAP_VADDR], %o4 + brz %o4, 9f + ldx [%o1 + TSB_CONFIG_MAP_PTE], %o5 + + sethi %hi(sparc64_highest_unlocked_tlb_ent), %g2 + mov TLB_TAG_ACCESS, %g3 + lduw [%g2 + %lo(sparc64_highest_unlocked_tlb_ent)], %g2 + stxa %o4, [%g3] ASI_DMMU + membar #Sync + sllx %g2, 3, %g2 + stxa %o5, [%g2] ASI_DTLB_DATA_ACCESS + membar #Sync + + brz,pt %o2, 9f + nop + + ldx [%o2 + TSB_CONFIG_MAP_VADDR], %o4 + ldx [%o2 + TSB_CONFIG_MAP_PTE], %o5 + mov TLB_TAG_ACCESS, %g3 + stxa %o4, [%g3] ASI_DMMU + membar #Sync + sub %g2, (1 << 3), %g2 + stxa %o5, [%g2] ASI_DTLB_DATA_ACCESS + membar #Sync + +9: + wrpr %g1, %pstate + + retl + nop + .size __tsb_context_switch, .-__tsb_context_switch + +#define TSB_PASS_BITS ((1 << TSB_TAG_LOCK_BIT) | \ + (1 << TSB_TAG_INVALID_BIT)) + + .align 32 + .globl copy_tsb + .type copy_tsb,#function +copy_tsb: /* %o0=old_tsb_base, %o1=old_tsb_size + * %o2=new_tsb_base, %o3=new_tsb_size + */ + sethi %uhi(TSB_PASS_BITS), %g7 + srlx %o3, 4, %o3 + add %o0, %o1, %g1 /* end of old tsb */ + sllx %g7, 32, %g7 + sub %o3, 1, %o3 /* %o3 == new tsb hash mask */ + +661: prefetcha [%o0] ASI_N, #one_read + .section .tsb_phys_patch, "ax" + .word 661b + prefetcha [%o0] ASI_PHYS_USE_EC, #one_read + .previous + +90: andcc %o0, (64 - 1), %g0 + bne 1f + add %o0, 64, %o5 + +661: prefetcha [%o5] ASI_N, #one_read + .section .tsb_phys_patch, "ax" + .word 661b + prefetcha [%o5] ASI_PHYS_USE_EC, #one_read + .previous + +1: TSB_LOAD_QUAD(%o0, %g2) /* %g2/%g3 == TSB entry */ + andcc %g2, %g7, %g0 /* LOCK or INVALID set? */ + bne,pn %xcc, 80f /* Skip it */ + sllx %g2, 22, %o4 /* TAG --> VADDR */ + + /* This can definitely be computed faster... */ + srlx %o0, 4, %o5 /* Build index */ + and %o5, 511, %o5 /* Mask index */ + sllx %o5, PAGE_SHIFT, %o5 /* Put into vaddr position */ + or %o4, %o5, %o4 /* Full VADDR. */ + srlx %o4, PAGE_SHIFT, %o4 /* Shift down to create index */ + and %o4, %o3, %o4 /* Mask with new_tsb_nents-1 */ + sllx %o4, 4, %o4 /* Shift back up into tsb ent offset */ + TSB_STORE(%o2 + %o4, %g2) /* Store TAG */ + add %o4, 0x8, %o4 /* Advance to TTE */ + TSB_STORE(%o2 + %o4, %g3) /* Store TTE */ + +80: add %o0, 16, %o0 + cmp %o0, %g1 + bne,pt %xcc, 90b + nop + + retl + TSB_MEMBAR + .size copy_tsb, .-copy_tsb + + /* Set the invalid bit in all TSB entries. */ + .align 32 + .globl tsb_init + .type tsb_init,#function +tsb_init: /* %o0 = TSB vaddr, %o1 = size in bytes */ + prefetch [%o0 + 0x000], #n_writes + mov 1, %g1 + prefetch [%o0 + 0x040], #n_writes + sllx %g1, TSB_TAG_INVALID_BIT, %g1 + prefetch [%o0 + 0x080], #n_writes +1: prefetch [%o0 + 0x0c0], #n_writes + stx %g1, [%o0 + 0x00] + stx %g1, [%o0 + 0x10] + stx %g1, [%o0 + 0x20] + stx %g1, [%o0 + 0x30] + prefetch [%o0 + 0x100], #n_writes + stx %g1, [%o0 + 0x40] + stx %g1, [%o0 + 0x50] + stx %g1, [%o0 + 0x60] + stx %g1, [%o0 + 0x70] + prefetch [%o0 + 0x140], #n_writes + stx %g1, [%o0 + 0x80] + stx %g1, [%o0 + 0x90] + stx %g1, [%o0 + 0xa0] + stx %g1, [%o0 + 0xb0] + prefetch [%o0 + 0x180], #n_writes + stx %g1, [%o0 + 0xc0] + stx %g1, [%o0 + 0xd0] + stx %g1, [%o0 + 0xe0] + stx %g1, [%o0 + 0xf0] + subcc %o1, 0x100, %o1 + bne,pt %xcc, 1b + add %o0, 0x100, %o0 + retl + nop + nop + nop + .size tsb_init, .-tsb_init + + .globl NGtsb_init + .type NGtsb_init,#function +NGtsb_init: + rd %asi, %g2 + mov 1, %g1 + wr %g0, ASI_BLK_INIT_QUAD_LDD_P, %asi + sllx %g1, TSB_TAG_INVALID_BIT, %g1 +1: stxa %g1, [%o0 + 0x00] %asi + stxa %g1, [%o0 + 0x10] %asi + stxa %g1, [%o0 + 0x20] %asi + stxa %g1, [%o0 + 0x30] %asi + stxa %g1, [%o0 + 0x40] %asi + stxa %g1, [%o0 + 0x50] %asi + stxa %g1, [%o0 + 0x60] %asi + stxa %g1, [%o0 + 0x70] %asi + stxa %g1, [%o0 + 0x80] %asi + stxa %g1, [%o0 + 0x90] %asi + stxa %g1, [%o0 + 0xa0] %asi + stxa %g1, [%o0 + 0xb0] %asi + stxa %g1, [%o0 + 0xc0] %asi + stxa %g1, [%o0 + 0xd0] %asi + stxa %g1, [%o0 + 0xe0] %asi + stxa %g1, [%o0 + 0xf0] %asi + subcc %o1, 0x100, %o1 + bne,pt %xcc, 1b + add %o0, 0x100, %o0 + retl + wr %g2, 0x0, %asi + .size NGtsb_init, .-NGtsb_init diff --git a/arch/sparc64/kernel/ttable.S b/arch/sparc64/kernel/ttable.S index 8365bc1f81f..5d901519db5 100644 --- a/arch/sparc64/kernel/ttable.S +++ b/arch/sparc64/kernel/ttable.S @@ -1,7 +1,6 @@ -/* $Id: ttable.S,v 1.38 2002/02/09 19:49:30 davem Exp $ - * ttable.S: Sparc V9 Trap Table(s) with SpitFire/Cheetah extensions. +/* ttable.S: Sparc V9 Trap Table(s) with SpitFire/Cheetah/SUN4V extensions. * - * Copyright (C) 1996, 2001 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1996, 2001, 2006 David S. Miller (davem@davemloft.net) */ #include <linux/config.h> @@ -19,7 +18,7 @@ tl0_resv000: BOOT_KERNEL BTRAP(0x1) BTRAP(0x2) BTRAP(0x3) tl0_resv004: BTRAP(0x4) BTRAP(0x5) BTRAP(0x6) BTRAP(0x7) tl0_iax: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_insn_access_exception) -tl0_resv009: BTRAP(0x9) +tl0_itsb_4v: SUN4V_ITSB_MISS tl0_iae: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_access_error) tl0_resv00b: BTRAP(0xb) BTRAP(0xc) BTRAP(0xd) BTRAP(0xe) BTRAP(0xf) @@ -38,7 +37,7 @@ tl0_div0: TRAP(do_div0) tl0_resv029: BTRAP(0x29) BTRAP(0x2a) BTRAP(0x2b) BTRAP(0x2c) BTRAP(0x2d) BTRAP(0x2e) tl0_resv02f: BTRAP(0x2f) tl0_dax: TRAP_NOSAVE(__spitfire_data_access_exception) -tl0_resv031: BTRAP(0x31) +tl0_dtsb_4v: SUN4V_DTSB_MISS tl0_dae: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_access_error) tl0_resv033: BTRAP(0x33) @@ -52,12 +51,13 @@ tl0_resv03e: BTRAP(0x3e) BTRAP(0x3f) BTRAP(0x40) tl0_irq1: TRAP_IRQ(smp_call_function_client, 1) tl0_irq2: TRAP_IRQ(smp_receive_signal_client, 2) tl0_irq3: TRAP_IRQ(smp_penguin_jailcell, 3) +tl0_irq4: TRAP_IRQ(smp_new_mmu_context_version_client, 4) #else tl0_irq1: BTRAP(0x41) tl0_irq2: BTRAP(0x42) tl0_irq3: BTRAP(0x43) +tl0_irq4: BTRAP(0x44) #endif -tl0_irq4: TRAP_IRQ(handler_irq, 4) tl0_irq5: TRAP_IRQ(handler_irq, 5) TRAP_IRQ(handler_irq, 6) tl0_irq7: TRAP_IRQ(handler_irq, 7) TRAP_IRQ(handler_irq, 8) tl0_irq9: TRAP_IRQ(handler_irq, 9) TRAP_IRQ(handler_irq, 10) @@ -78,9 +78,9 @@ tl0_vaw: TRAP(do_vaw) tl0_cee: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_cee_trap) tl0_iamiss: -#include "itlb_base.S" +#include "itlb_miss.S" tl0_damiss: -#include "dtlb_base.S" +#include "dtlb_miss.S" tl0_daprot: #include "dtlb_prot.S" tl0_fecc: BTRAP(0x70) /* Fast-ECC on Cheetah */ @@ -88,15 +88,18 @@ tl0_dcpe: BTRAP(0x71) /* D-cache Parity Error on Cheetah+ */ tl0_icpe: BTRAP(0x72) /* I-cache Parity Error on Cheetah+ */ tl0_resv073: BTRAP(0x73) BTRAP(0x74) BTRAP(0x75) tl0_resv076: BTRAP(0x76) BTRAP(0x77) BTRAP(0x78) BTRAP(0x79) BTRAP(0x7a) BTRAP(0x7b) -tl0_resv07c: BTRAP(0x7c) BTRAP(0x7d) BTRAP(0x7e) BTRAP(0x7f) +tl0_cpu_mondo: TRAP_NOSAVE(sun4v_cpu_mondo) +tl0_dev_mondo: TRAP_NOSAVE(sun4v_dev_mondo) +tl0_res_mondo: TRAP_NOSAVE(sun4v_res_mondo) +tl0_nres_mondo: TRAP_NOSAVE(sun4v_nonres_mondo) tl0_s0n: SPILL_0_NORMAL tl0_s1n: SPILL_1_NORMAL tl0_s2n: SPILL_2_NORMAL -tl0_s3n: SPILL_3_NORMAL -tl0_s4n: SPILL_4_NORMAL -tl0_s5n: SPILL_5_NORMAL -tl0_s6n: SPILL_6_NORMAL -tl0_s7n: SPILL_7_NORMAL +tl0_s3n: SPILL_0_NORMAL_ETRAP +tl0_s4n: SPILL_1_GENERIC_ETRAP +tl0_s5n: SPILL_1_GENERIC_ETRAP_FIXUP +tl0_s6n: SPILL_2_GENERIC_ETRAP +tl0_s7n: SPILL_2_GENERIC_ETRAP_FIXUP tl0_s0o: SPILL_0_OTHER tl0_s1o: SPILL_1_OTHER tl0_s2o: SPILL_2_OTHER @@ -110,9 +113,9 @@ tl0_f1n: FILL_1_NORMAL tl0_f2n: FILL_2_NORMAL tl0_f3n: FILL_3_NORMAL tl0_f4n: FILL_4_NORMAL -tl0_f5n: FILL_5_NORMAL -tl0_f6n: FILL_6_NORMAL -tl0_f7n: FILL_7_NORMAL +tl0_f5n: FILL_0_NORMAL_RTRAP +tl0_f6n: FILL_1_GENERIC_RTRAP +tl0_f7n: FILL_2_GENERIC_RTRAP tl0_f0o: FILL_0_OTHER tl0_f1o: FILL_1_OTHER tl0_f2o: FILL_2_OTHER @@ -128,7 +131,7 @@ tl0_flushw: FLUSH_WINDOW_TRAP tl0_resv104: BTRAP(0x104) BTRAP(0x105) BTRAP(0x106) BTRAP(0x107) .globl tl0_solaris tl0_solaris: SOLARIS_SYSCALL_TRAP -tl0_netbsd: NETBSD_SYSCALL_TRAP +tl0_resv109: BTRAP(0x109) tl0_resv10a: BTRAP(0x10a) BTRAP(0x10b) BTRAP(0x10c) BTRAP(0x10d) BTRAP(0x10e) tl0_resv10f: BTRAP(0x10f) tl0_linux32: LINUX_32BIT_SYSCALL_TRAP @@ -179,7 +182,7 @@ sparc64_ttable_tl1: tl1_resv000: BOOT_KERNEL BTRAPTL1(0x1) BTRAPTL1(0x2) BTRAPTL1(0x3) tl1_resv004: BTRAPTL1(0x4) BTRAPTL1(0x5) BTRAPTL1(0x6) BTRAPTL1(0x7) tl1_iax: TRAP_NOSAVE(__spitfire_insn_access_exception_tl1) -tl1_resv009: BTRAPTL1(0x9) +tl1_itsb_4v: SUN4V_ITSB_MISS tl1_iae: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_access_error) tl1_resv00b: BTRAPTL1(0xb) BTRAPTL1(0xc) BTRAPTL1(0xd) BTRAPTL1(0xe) BTRAPTL1(0xf) @@ -198,7 +201,7 @@ tl1_div0: TRAPTL1(do_div0_tl1) tl1_resv029: BTRAPTL1(0x29) BTRAPTL1(0x2a) BTRAPTL1(0x2b) BTRAPTL1(0x2c) tl1_resv02d: BTRAPTL1(0x2d) BTRAPTL1(0x2e) BTRAPTL1(0x2f) tl1_dax: TRAP_NOSAVE(__spitfire_data_access_exception_tl1) -tl1_resv031: BTRAPTL1(0x31) +tl1_dtsb_4v: SUN4V_DTSB_MISS tl1_dae: membar #Sync TRAP_NOSAVE_7INSNS(__spitfire_access_error) tl1_resv033: BTRAPTL1(0x33) @@ -222,26 +225,10 @@ tl1_resv05c: BTRAPTL1(0x5c) BTRAPTL1(0x5d) BTRAPTL1(0x5e) BTRAPTL1(0x5f) tl1_ivec: TRAP_IVEC tl1_paw: TRAPTL1(do_paw_tl1) tl1_vaw: TRAPTL1(do_vaw_tl1) - - /* The grotty trick to save %g1 into current->thread.cee_stuff - * is because when we take this trap we could be interrupting - * trap code already using the trap alternate global registers. - * - * We cross our fingers and pray that this store/load does - * not cause yet another CEE trap. - */ -tl1_cee: membar #Sync - stx %g1, [%g6 + TI_CEE_STUFF] - ldxa [%g0] ASI_AFSR, %g1 - membar #Sync - stxa %g1, [%g0] ASI_AFSR - membar #Sync - ldx [%g6 + TI_CEE_STUFF], %g1 - retry - +tl1_cee: BTRAPTL1(0x63) tl1_iamiss: BTRAPTL1(0x64) BTRAPTL1(0x65) BTRAPTL1(0x66) BTRAPTL1(0x67) tl1_damiss: -#include "dtlb_backend.S" +#include "dtlb_miss.S" tl1_daprot: #include "dtlb_prot.S" tl1_fecc: BTRAPTL1(0x70) /* Fast-ECC on Cheetah */ diff --git a/arch/sparc64/kernel/unaligned.c b/arch/sparc64/kernel/unaligned.c index 70faf630603..001e8518331 100644 --- a/arch/sparc64/kernel/unaligned.c +++ b/arch/sparc64/kernel/unaligned.c @@ -277,7 +277,7 @@ static void kernel_mna_trap_fault(void) regs->tstate |= (ASI_AIUS << 24UL); } -asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn, unsigned long sfar, unsigned long sfsr) +asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn) { enum direction dir = decode_direction(insn); int size = decode_access_size(insn); @@ -405,6 +405,9 @@ extern void do_privact(struct pt_regs *regs); extern void spitfire_data_access_exception(struct pt_regs *regs, unsigned long sfsr, unsigned long sfar); +extern void sun4v_data_access_exception(struct pt_regs *regs, + unsigned long addr, + unsigned long type_ctx); int handle_ldf_stq(u32 insn, struct pt_regs *regs) { @@ -447,14 +450,20 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs) break; } default: - spitfire_data_access_exception(regs, 0, addr); + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, addr, 0); + else + spitfire_data_access_exception(regs, 0, addr); return 1; } if (put_user (first >> 32, (u32 __user *)addr) || __put_user ((u32)first, (u32 __user *)(addr + 4)) || __put_user (second >> 32, (u32 __user *)(addr + 8)) || __put_user ((u32)second, (u32 __user *)(addr + 12))) { - spitfire_data_access_exception(regs, 0, addr); + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, addr, 0); + else + spitfire_data_access_exception(regs, 0, addr); return 1; } } else { @@ -467,7 +476,10 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs) do_privact(regs); return 1; } else if (asi > ASI_SNFL) { - spitfire_data_access_exception(regs, 0, addr); + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, addr, 0); + else + spitfire_data_access_exception(regs, 0, addr); return 1; } switch (insn & 0x180000) { @@ -484,7 +496,10 @@ int handle_ldf_stq(u32 insn, struct pt_regs *regs) err |= __get_user (data[i], (u32 __user *)(addr + 4*i)); } if (err && !(asi & 0x2 /* NF */)) { - spitfire_data_access_exception(regs, 0, addr); + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, addr, 0); + else + spitfire_data_access_exception(regs, 0, addr); return 1; } if (asi & 0x8) /* Little */ { @@ -548,7 +563,7 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr u32 insn; u32 first, second; u64 value; - u8 asi, freg; + u8 freg; int flag; struct fpustate *f = FPUSTATE; @@ -557,7 +572,7 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr if (test_thread_flag(TIF_32BIT)) pc = (u32)pc; if (get_user(insn, (u32 __user *) pc) != -EFAULT) { - asi = sfsr >> 16; + int asi = decode_asi(insn, regs); if ((asi > ASI_SNFL) || (asi < ASI_P)) goto daex; @@ -587,7 +602,11 @@ void handle_lddfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr *(u64 *)(f->regs + freg) = value; current_thread_info()->fpsaved[0] |= flag; } else { -daex: spitfire_data_access_exception(regs, sfsr, sfar); +daex: + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, sfar, sfsr); + else + spitfire_data_access_exception(regs, sfsr, sfar); return; } advance(regs); @@ -600,7 +619,7 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr unsigned long tstate = regs->tstate; u32 insn; u64 value; - u8 asi, freg; + u8 freg; int flag; struct fpustate *f = FPUSTATE; @@ -609,8 +628,8 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr if (test_thread_flag(TIF_32BIT)) pc = (u32)pc; if (get_user(insn, (u32 __user *) pc) != -EFAULT) { + int asi = decode_asi(insn, regs); freg = ((insn >> 25) & 0x1e) | ((insn >> 20) & 0x20); - asi = sfsr >> 16; value = 0; flag = (freg < 32) ? FPRS_DL : FPRS_DU; if ((asi > ASI_SNFL) || @@ -631,7 +650,11 @@ void handle_stdfmna(struct pt_regs *regs, unsigned long sfar, unsigned long sfsr __put_user ((u32)value, (u32 __user *)(sfar + 4))) goto daex; } else { -daex: spitfire_data_access_exception(regs, sfsr, sfar); +daex: + if (tlb_type == hypervisor) + sun4v_data_access_exception(regs, sfar, sfsr); + else + spitfire_data_access_exception(regs, sfsr, sfar); return; } advance(regs); diff --git a/arch/sparc64/kernel/us2e_cpufreq.c b/arch/sparc64/kernel/us2e_cpufreq.c index b35dc8dc995..1f83fe6a82d 100644 --- a/arch/sparc64/kernel/us2e_cpufreq.c +++ b/arch/sparc64/kernel/us2e_cpufreq.c @@ -346,6 +346,9 @@ static int __init us2e_freq_init(void) unsigned long manuf, impl, ver; int ret; + if (tlb_type != spitfire) + return -ENODEV; + __asm__("rdpr %%ver, %0" : "=r" (ver)); manuf = ((ver >> 48) & 0xffff); impl = ((ver >> 32) & 0xffff); @@ -354,20 +357,16 @@ static int __init us2e_freq_init(void) struct cpufreq_driver *driver; ret = -ENOMEM; - driver = kmalloc(sizeof(struct cpufreq_driver), GFP_KERNEL); + driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL); if (!driver) goto err_out; - memset(driver, 0, sizeof(*driver)); - us2e_freq_table = kmalloc( + us2e_freq_table = kzalloc( (NR_CPUS * sizeof(struct us2e_freq_percpu_info)), GFP_KERNEL); if (!us2e_freq_table) goto err_out; - memset(us2e_freq_table, 0, - (NR_CPUS * sizeof(struct us2e_freq_percpu_info))); - driver->init = us2e_freq_cpu_init; driver->verify = us2e_freq_verify; driver->target = us2e_freq_target; diff --git a/arch/sparc64/kernel/us3_cpufreq.c b/arch/sparc64/kernel/us3_cpufreq.c index 6d1f9a3c464..47e3acafb5b 100644 --- a/arch/sparc64/kernel/us3_cpufreq.c +++ b/arch/sparc64/kernel/us3_cpufreq.c @@ -203,6 +203,9 @@ static int __init us3_freq_init(void) unsigned long manuf, impl, ver; int ret; + if (tlb_type != cheetah && tlb_type != cheetah_plus) + return -ENODEV; + __asm__("rdpr %%ver, %0" : "=r" (ver)); manuf = ((ver >> 48) & 0xffff); impl = ((ver >> 32) & 0xffff); @@ -215,20 +218,16 @@ static int __init us3_freq_init(void) struct cpufreq_driver *driver; ret = -ENOMEM; - driver = kmalloc(sizeof(struct cpufreq_driver), GFP_KERNEL); + driver = kzalloc(sizeof(struct cpufreq_driver), GFP_KERNEL); if (!driver) goto err_out; - memset(driver, 0, sizeof(*driver)); - us3_freq_table = kmalloc( + us3_freq_table = kzalloc( (NR_CPUS * sizeof(struct us3_freq_percpu_info)), GFP_KERNEL); if (!us3_freq_table) goto err_out; - memset(us3_freq_table, 0, - (NR_CPUS * sizeof(struct us3_freq_percpu_info))); - driver->init = us3_freq_cpu_init; driver->verify = us3_freq_verify; driver->target = us3_freq_target; diff --git a/arch/sparc64/kernel/visemul.c b/arch/sparc64/kernel/visemul.c new file mode 100644 index 00000000000..84fedaa38aa --- /dev/null +++ b/arch/sparc64/kernel/visemul.c @@ -0,0 +1,894 @@ +/* visemul.c: Emulation of VIS instructions. + * + * Copyright (C) 2006 David S. Miller (davem@davemloft.net) + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/thread_info.h> + +#include <asm/ptrace.h> +#include <asm/pstate.h> +#include <asm/system.h> +#include <asm/fpumacro.h> +#include <asm/uaccess.h> + +/* OPF field of various VIS instructions. */ + +/* 000111011 - four 16-bit packs */ +#define FPACK16_OPF 0x03b + +/* 000111010 - two 32-bit packs */ +#define FPACK32_OPF 0x03a + +/* 000111101 - four 16-bit packs */ +#define FPACKFIX_OPF 0x03d + +/* 001001101 - four 16-bit expands */ +#define FEXPAND_OPF 0x04d + +/* 001001011 - two 32-bit merges */ +#define FPMERGE_OPF 0x04b + +/* 000110001 - 8-by-16-bit partitoned product */ +#define FMUL8x16_OPF 0x031 + +/* 000110011 - 8-by-16-bit upper alpha partitioned product */ +#define FMUL8x16AU_OPF 0x033 + +/* 000110101 - 8-by-16-bit lower alpha partitioned product */ +#define FMUL8x16AL_OPF 0x035 + +/* 000110110 - upper 8-by-16-bit partitioned product */ +#define FMUL8SUx16_OPF 0x036 + +/* 000110111 - lower 8-by-16-bit partitioned product */ +#define FMUL8ULx16_OPF 0x037 + +/* 000111000 - upper 8-by-16-bit partitioned product */ +#define FMULD8SUx16_OPF 0x038 + +/* 000111001 - lower unsigned 8-by-16-bit partitioned product */ +#define FMULD8ULx16_OPF 0x039 + +/* 000101000 - four 16-bit compare; set rd if src1 > src2 */ +#define FCMPGT16_OPF 0x028 + +/* 000101100 - two 32-bit compare; set rd if src1 > src2 */ +#define FCMPGT32_OPF 0x02c + +/* 000100000 - four 16-bit compare; set rd if src1 <= src2 */ +#define FCMPLE16_OPF 0x020 + +/* 000100100 - two 32-bit compare; set rd if src1 <= src2 */ +#define FCMPLE32_OPF 0x024 + +/* 000100010 - four 16-bit compare; set rd if src1 != src2 */ +#define FCMPNE16_OPF 0x022 + +/* 000100110 - two 32-bit compare; set rd if src1 != src2 */ +#define FCMPNE32_OPF 0x026 + +/* 000101010 - four 16-bit compare; set rd if src1 == src2 */ +#define FCMPEQ16_OPF 0x02a + +/* 000101110 - two 32-bit compare; set rd if src1 == src2 */ +#define FCMPEQ32_OPF 0x02e + +/* 000000000 - Eight 8-bit edge boundary processing */ +#define EDGE8_OPF 0x000 + +/* 000000001 - Eight 8-bit edge boundary processing, no CC */ +#define EDGE8N_OPF 0x001 + +/* 000000010 - Eight 8-bit edge boundary processing, little-endian */ +#define EDGE8L_OPF 0x002 + +/* 000000011 - Eight 8-bit edge boundary processing, little-endian, no CC */ +#define EDGE8LN_OPF 0x003 + +/* 000000100 - Four 16-bit edge boundary processing */ +#define EDGE16_OPF 0x004 + +/* 000000101 - Four 16-bit edge boundary processing, no CC */ +#define EDGE16N_OPF 0x005 + +/* 000000110 - Four 16-bit edge boundary processing, little-endian */ +#define EDGE16L_OPF 0x006 + +/* 000000111 - Four 16-bit edge boundary processing, little-endian, no CC */ +#define EDGE16LN_OPF 0x007 + +/* 000001000 - Two 32-bit edge boundary processing */ +#define EDGE32_OPF 0x008 + +/* 000001001 - Two 32-bit edge boundary processing, no CC */ +#define EDGE32N_OPF 0x009 + +/* 000001010 - Two 32-bit edge boundary processing, little-endian */ +#define EDGE32L_OPF 0x00a + +/* 000001011 - Two 32-bit edge boundary processing, little-endian, no CC */ +#define EDGE32LN_OPF 0x00b + +/* 000111110 - distance between 8 8-bit components */ +#define PDIST_OPF 0x03e + +/* 000010000 - convert 8-bit 3-D address to blocked byte address */ +#define ARRAY8_OPF 0x010 + +/* 000010010 - convert 16-bit 3-D address to blocked byte address */ +#define ARRAY16_OPF 0x012 + +/* 000010100 - convert 32-bit 3-D address to blocked byte address */ +#define ARRAY32_OPF 0x014 + +/* 000011001 - Set the GSR.MASK field in preparation for a BSHUFFLE */ +#define BMASK_OPF 0x019 + +/* 001001100 - Permute bytes as specified by GSR.MASK */ +#define BSHUFFLE_OPF 0x04c + +#define VIS_OPCODE_MASK ((0x3 << 30) | (0x3f << 19)) +#define VIS_OPCODE_VAL ((0x2 << 30) | (0x36 << 19)) + +#define VIS_OPF_SHIFT 5 +#define VIS_OPF_MASK (0x1ff << VIS_OPF_SHIFT) + +#define RS1(INSN) (((INSN) >> 24) & 0x1f) +#define RS2(INSN) (((INSN) >> 0) & 0x1f) +#define RD(INSN) (((INSN) >> 25) & 0x1f) + +static inline void maybe_flush_windows(unsigned int rs1, unsigned int rs2, + unsigned int rd, int from_kernel) +{ + if (rs2 >= 16 || rs1 >= 16 || rd >= 16) { + if (from_kernel != 0) + __asm__ __volatile__("flushw"); + else + flushw_user(); + } +} + +static unsigned long fetch_reg(unsigned int reg, struct pt_regs *regs) +{ + unsigned long value; + + if (reg < 16) + return (!reg ? 0 : regs->u_regs[reg]); + if (regs->tstate & TSTATE_PRIV) { + struct reg_window *win; + win = (struct reg_window *)(regs->u_regs[UREG_FP] + STACK_BIAS); + value = win->locals[reg - 16]; + } else if (test_thread_flag(TIF_32BIT)) { + struct reg_window32 __user *win32; + win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP])); + get_user(value, &win32->locals[reg - 16]); + } else { + struct reg_window __user *win; + win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS); + get_user(value, &win->locals[reg - 16]); + } + return value; +} + +static inline unsigned long __user *__fetch_reg_addr_user(unsigned int reg, + struct pt_regs *regs) +{ + BUG_ON(reg < 16); + BUG_ON(regs->tstate & TSTATE_PRIV); + + if (test_thread_flag(TIF_32BIT)) { + struct reg_window32 __user *win32; + win32 = (struct reg_window32 __user *)((unsigned long)((u32)regs->u_regs[UREG_FP])); + return (unsigned long __user *)&win32->locals[reg - 16]; + } else { + struct reg_window __user *win; + win = (struct reg_window __user *)(regs->u_regs[UREG_FP] + STACK_BIAS); + return &win->locals[reg - 16]; + } +} + +static inline unsigned long *__fetch_reg_addr_kern(unsigned int reg, + struct pt_regs *regs) +{ + BUG_ON(reg >= 16); + BUG_ON(regs->tstate & TSTATE_PRIV); + + return ®s->u_regs[reg]; +} + +static void store_reg(struct pt_regs *regs, unsigned long val, unsigned long rd) +{ + if (rd < 16) { + unsigned long *rd_kern = __fetch_reg_addr_kern(rd, regs); + + *rd_kern = val; + } else { + unsigned long __user *rd_user = __fetch_reg_addr_user(rd, regs); + + if (test_thread_flag(TIF_32BIT)) + __put_user((u32)val, (u32 __user *)rd_user); + else + __put_user(val, rd_user); + } +} + +static inline unsigned long fpd_regval(struct fpustate *f, + unsigned int insn_regnum) +{ + insn_regnum = (((insn_regnum & 1) << 5) | + (insn_regnum & 0x1e)); + + return *(unsigned long *) &f->regs[insn_regnum]; +} + +static inline unsigned long *fpd_regaddr(struct fpustate *f, + unsigned int insn_regnum) +{ + insn_regnum = (((insn_regnum & 1) << 5) | + (insn_regnum & 0x1e)); + + return (unsigned long *) &f->regs[insn_regnum]; +} + +static inline unsigned int fps_regval(struct fpustate *f, + unsigned int insn_regnum) +{ + return f->regs[insn_regnum]; +} + +static inline unsigned int *fps_regaddr(struct fpustate *f, + unsigned int insn_regnum) +{ + return &f->regs[insn_regnum]; +} + +struct edge_tab { + u16 left, right; +}; +struct edge_tab edge8_tab[8] = { + { 0xff, 0x80 }, + { 0x7f, 0xc0 }, + { 0x3f, 0xe0 }, + { 0x1f, 0xf0 }, + { 0x0f, 0xf8 }, + { 0x07, 0xfc }, + { 0x03, 0xfe }, + { 0x01, 0xff }, +}; +struct edge_tab edge8_tab_l[8] = { + { 0xff, 0x01 }, + { 0xfe, 0x03 }, + { 0xfc, 0x07 }, + { 0xf8, 0x0f }, + { 0xf0, 0x1f }, + { 0xe0, 0x3f }, + { 0xc0, 0x7f }, + { 0x80, 0xff }, +}; +struct edge_tab edge16_tab[4] = { + { 0xf, 0x8 }, + { 0x7, 0xc }, + { 0x3, 0xe }, + { 0x1, 0xf }, +}; +struct edge_tab edge16_tab_l[4] = { + { 0xf, 0x1 }, + { 0xe, 0x3 }, + { 0xc, 0x7 }, + { 0x8, 0xf }, +}; +struct edge_tab edge32_tab[2] = { + { 0x3, 0x2 }, + { 0x1, 0x3 }, +}; +struct edge_tab edge32_tab_l[2] = { + { 0x3, 0x1 }, + { 0x2, 0x3 }, +}; + +static void edge(struct pt_regs *regs, unsigned int insn, unsigned int opf) +{ + unsigned long orig_rs1, rs1, orig_rs2, rs2, rd_val; + u16 left, right; + + maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0); + orig_rs1 = rs1 = fetch_reg(RS1(insn), regs); + orig_rs2 = rs2 = fetch_reg(RS2(insn), regs); + + if (test_thread_flag(TIF_32BIT)) { + rs1 = rs1 & 0xffffffff; + rs2 = rs2 & 0xffffffff; + } + switch (opf) { + default: + case EDGE8_OPF: + case EDGE8N_OPF: + left = edge8_tab[rs1 & 0x7].left; + right = edge8_tab[rs2 & 0x7].right; + break; + case EDGE8L_OPF: + case EDGE8LN_OPF: + left = edge8_tab_l[rs1 & 0x7].left; + right = edge8_tab_l[rs2 & 0x7].right; + break; + + case EDGE16_OPF: + case EDGE16N_OPF: + left = edge16_tab[(rs1 >> 1) & 0x3].left; + right = edge16_tab[(rs2 >> 1) & 0x3].right; + break; + + case EDGE16L_OPF: + case EDGE16LN_OPF: + left = edge16_tab_l[(rs1 >> 1) & 0x3].left; + right = edge16_tab_l[(rs2 >> 1) & 0x3].right; + break; + + case EDGE32_OPF: + case EDGE32N_OPF: + left = edge32_tab[(rs1 >> 2) & 0x1].left; + right = edge32_tab[(rs2 >> 2) & 0x1].right; + break; + + case EDGE32L_OPF: + case EDGE32LN_OPF: + left = edge32_tab_l[(rs1 >> 2) & 0x1].left; + right = edge32_tab_l[(rs2 >> 2) & 0x1].right; + break; + }; + + if ((rs1 & ~0x7UL) == (rs2 & ~0x7UL)) + rd_val = right & left; + else + rd_val = left; + + store_reg(regs, rd_val, RD(insn)); + + switch (opf) { + case EDGE8_OPF: + case EDGE8L_OPF: + case EDGE16_OPF: + case EDGE16L_OPF: + case EDGE32_OPF: + case EDGE32L_OPF: { + unsigned long ccr, tstate; + + __asm__ __volatile__("subcc %1, %2, %%g0\n\t" + "rd %%ccr, %0" + : "=r" (ccr) + : "r" (orig_rs1), "r" (orig_rs2) + : "cc"); + tstate = regs->tstate & ~(TSTATE_XCC | TSTATE_ICC); + regs->tstate = tstate | (ccr << 32UL); + } + }; +} + +static void array(struct pt_regs *regs, unsigned int insn, unsigned int opf) +{ + unsigned long rs1, rs2, rd_val; + unsigned int bits, bits_mask; + + maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0); + rs1 = fetch_reg(RS1(insn), regs); + rs2 = fetch_reg(RS2(insn), regs); + + bits = (rs2 > 5 ? 5 : rs2); + bits_mask = (1UL << bits) - 1UL; + + rd_val = ((((rs1 >> 11) & 0x3) << 0) | + (((rs1 >> 33) & 0x3) << 2) | + (((rs1 >> 55) & 0x1) << 4) | + (((rs1 >> 13) & 0xf) << 5) | + (((rs1 >> 35) & 0xf) << 9) | + (((rs1 >> 56) & 0xf) << 13) | + (((rs1 >> 17) & bits_mask) << 17) | + (((rs1 >> 39) & bits_mask) << (17 + bits)) | + (((rs1 >> 60) & 0xf) << (17 + (2*bits)))); + + switch (opf) { + case ARRAY16_OPF: + rd_val <<= 1; + break; + + case ARRAY32_OPF: + rd_val <<= 2; + }; + + store_reg(regs, rd_val, RD(insn)); +} + +static void bmask(struct pt_regs *regs, unsigned int insn) +{ + unsigned long rs1, rs2, rd_val, gsr; + + maybe_flush_windows(RS1(insn), RS2(insn), RD(insn), 0); + rs1 = fetch_reg(RS1(insn), regs); + rs2 = fetch_reg(RS2(insn), regs); + rd_val = rs1 + rs2; + + store_reg(regs, rd_val, RD(insn)); + + gsr = current_thread_info()->gsr[0] & 0xffffffff; + gsr |= rd_val << 32UL; + current_thread_info()->gsr[0] = gsr; +} + +static void bshuffle(struct pt_regs *regs, unsigned int insn) +{ + struct fpustate *f = FPUSTATE; + unsigned long rs1, rs2, rd_val; + unsigned long bmask, i; + + bmask = current_thread_info()->gsr[0] >> 32UL; + + rs1 = fpd_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS2(insn)); + + rd_val = 0UL; + for (i = 0; i < 8; i++) { + unsigned long which = (bmask >> (i * 4)) & 0xf; + unsigned long byte; + + if (which < 8) + byte = (rs1 >> (which * 8)) & 0xff; + else + byte = (rs2 >> ((which-8)*8)) & 0xff; + rd_val |= (byte << (i * 8)); + } + + *fpd_regaddr(f, RD(insn)) = rd_val; +} + +static void pdist(struct pt_regs *regs, unsigned int insn) +{ + struct fpustate *f = FPUSTATE; + unsigned long rs1, rs2, *rd, rd_val; + unsigned long i; + + rs1 = fpd_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS1(insn)); + rd = fpd_regaddr(f, RD(insn)); + + rd_val = *rd; + + for (i = 0; i < 8; i++) { + s16 s1, s2; + + s1 = (rs1 >> (56 - (i * 8))) & 0xff; + s2 = (rs2 >> (56 - (i * 8))) & 0xff; + + /* Absolute value of difference. */ + s1 -= s2; + if (s1 < 0) + s1 = ~s1 + 1; + + rd_val += s1; + } + + *rd = rd_val; +} + +static void pformat(struct pt_regs *regs, unsigned int insn, unsigned int opf) +{ + struct fpustate *f = FPUSTATE; + unsigned long rs1, rs2, gsr, scale, rd_val; + + gsr = current_thread_info()->gsr[0]; + scale = (gsr >> 3) & (opf == FPACK16_OPF ? 0xf : 0x1f); + switch (opf) { + case FPACK16_OPF: { + unsigned long byte; + + rs2 = fpd_regval(f, RS2(insn)); + rd_val = 0; + for (byte = 0; byte < 4; byte++) { + unsigned int val; + s16 src = (rs2 >> (byte * 16UL)) & 0xffffUL; + int scaled = src << scale; + int from_fixed = scaled >> 7; + + val = ((from_fixed < 0) ? + 0 : + (from_fixed > 255) ? + 255 : from_fixed); + + rd_val |= (val << (8 * byte)); + } + *fps_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FPACK32_OPF: { + unsigned long word; + + rs1 = fpd_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS2(insn)); + rd_val = (rs1 << 8) & ~(0x000000ff000000ffUL); + for (word = 0; word < 2; word++) { + unsigned long val; + s32 src = (rs2 >> (word * 32UL)); + s64 scaled = src << scale; + s64 from_fixed = scaled >> 23; + + val = ((from_fixed < 0) ? + 0 : + (from_fixed > 255) ? + 255 : from_fixed); + + rd_val |= (val << (32 * word)); + } + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FPACKFIX_OPF: { + unsigned long word; + + rs2 = fpd_regval(f, RS2(insn)); + + rd_val = 0; + for (word = 0; word < 2; word++) { + long val; + s32 src = (rs2 >> (word * 32UL)); + s64 scaled = src << scale; + s64 from_fixed = scaled >> 16; + + val = ((from_fixed < -32768) ? + -32768 : + (from_fixed > 32767) ? + 32767 : from_fixed); + + rd_val |= ((val & 0xffff) << (word * 16)); + } + *fps_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FEXPAND_OPF: { + unsigned long byte; + + rs2 = fps_regval(f, RS2(insn)); + + rd_val = 0; + for (byte = 0; byte < 4; byte++) { + unsigned long val; + u8 src = (rs2 >> (byte * 8)) & 0xff; + + val = src << 4; + + rd_val |= (val << (byte * 16)); + } + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FPMERGE_OPF: { + rs1 = fps_regval(f, RS1(insn)); + rs2 = fps_regval(f, RS2(insn)); + + rd_val = (((rs2 & 0x000000ff) << 0) | + ((rs1 & 0x000000ff) << 8) | + ((rs2 & 0x0000ff00) << 8) | + ((rs1 & 0x0000ff00) << 16) | + ((rs2 & 0x00ff0000) << 16) | + ((rs1 & 0x00ff0000) << 24) | + ((rs2 & 0xff000000) << 24) | + ((rs1 & 0xff000000) << 32)); + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + }; +} + +static void pmul(struct pt_regs *regs, unsigned int insn, unsigned int opf) +{ + struct fpustate *f = FPUSTATE; + unsigned long rs1, rs2, rd_val; + + switch (opf) { + case FMUL8x16_OPF: { + unsigned long byte; + + rs1 = fps_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS2(insn)); + + rd_val = 0; + for (byte = 0; byte < 4; byte++) { + u16 src1 = (rs1 >> (byte * 8)) & 0x00ff; + s16 src2 = (rs2 >> (byte * 16)) & 0xffff; + u32 prod = src1 * src2; + u16 scaled = ((prod & 0x00ffff00) >> 8); + + /* Round up. */ + if (prod & 0x80) + scaled++; + rd_val |= ((scaled & 0xffffUL) << (byte * 16UL)); + } + + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FMUL8x16AU_OPF: + case FMUL8x16AL_OPF: { + unsigned long byte; + s16 src2; + + rs1 = fps_regval(f, RS1(insn)); + rs2 = fps_regval(f, RS2(insn)); + + rd_val = 0; + src2 = (rs2 >> (opf == FMUL8x16AU_OPF) ? 16 : 0); + for (byte = 0; byte < 4; byte++) { + u16 src1 = (rs1 >> (byte * 8)) & 0x00ff; + u32 prod = src1 * src2; + u16 scaled = ((prod & 0x00ffff00) >> 8); + + /* Round up. */ + if (prod & 0x80) + scaled++; + rd_val |= ((scaled & 0xffffUL) << (byte * 16UL)); + } + + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FMUL8SUx16_OPF: + case FMUL8ULx16_OPF: { + unsigned long byte, ushift; + + rs1 = fpd_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS2(insn)); + + rd_val = 0; + ushift = (opf == FMUL8SUx16_OPF) ? 8 : 0; + for (byte = 0; byte < 4; byte++) { + u16 src1; + s16 src2; + u32 prod; + u16 scaled; + + src1 = ((rs1 >> ((16 * byte) + ushift)) & 0x00ff); + src2 = ((rs2 >> (16 * byte)) & 0xffff); + prod = src1 * src2; + scaled = ((prod & 0x00ffff00) >> 8); + + /* Round up. */ + if (prod & 0x80) + scaled++; + rd_val |= ((scaled & 0xffffUL) << (byte * 16UL)); + } + + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + + case FMULD8SUx16_OPF: + case FMULD8ULx16_OPF: { + unsigned long byte, ushift; + + rs1 = fps_regval(f, RS1(insn)); + rs2 = fps_regval(f, RS2(insn)); + + rd_val = 0; + ushift = (opf == FMULD8SUx16_OPF) ? 8 : 0; + for (byte = 0; byte < 2; byte++) { + u16 src1; + s16 src2; + u32 prod; + u16 scaled; + + src1 = ((rs1 >> ((16 * byte) + ushift)) & 0x00ff); + src2 = ((rs2 >> (16 * byte)) & 0xffff); + prod = src1 * src2; + scaled = ((prod & 0x00ffff00) >> 8); + + /* Round up. */ + if (prod & 0x80) + scaled++; + rd_val |= ((scaled & 0xffffUL) << + ((byte * 32UL) + 7UL)); + } + *fpd_regaddr(f, RD(insn)) = rd_val; + break; + } + }; +} + +static void pcmp(struct pt_regs *regs, unsigned int insn, unsigned int opf) +{ + struct fpustate *f = FPUSTATE; + unsigned long rs1, rs2, rd_val, i; + + rs1 = fpd_regval(f, RS1(insn)); + rs2 = fpd_regval(f, RS2(insn)); + + rd_val = 0; + + switch (opf) { + case FCMPGT16_OPF: + for (i = 0; i < 4; i++) { + s16 a = (rs1 >> (i * 16)) & 0xffff; + s16 b = (rs2 >> (i * 16)) & 0xffff; + + if (a > b) + rd_val |= 1 << i; + } + break; + + case FCMPGT32_OPF: + for (i = 0; i < 2; i++) { + s32 a = (rs1 >> (i * 32)) & 0xffff; + s32 b = (rs2 >> (i * 32)) & 0xffff; + + if (a > b) + rd_val |= 1 << i; + } + break; + + case FCMPLE16_OPF: + for (i = 0; i < 4; i++) { + s16 a = (rs1 >> (i * 16)) & 0xffff; + s16 b = (rs2 >> (i * 16)) & 0xffff; + + if (a <= b) + rd_val |= 1 << i; + } + break; + + case FCMPLE32_OPF: + for (i = 0; i < 2; i++) { + s32 a = (rs1 >> (i * 32)) & 0xffff; + s32 b = (rs2 >> (i * 32)) & 0xffff; + + if (a <= b) + rd_val |= 1 << i; + } + break; + + case FCMPNE16_OPF: + for (i = 0; i < 4; i++) { + s16 a = (rs1 >> (i * 16)) & 0xffff; + s16 b = (rs2 >> (i * 16)) & 0xffff; + + if (a != b) + rd_val |= 1 << i; + } + break; + + case FCMPNE32_OPF: + for (i = 0; i < 2; i++) { + s32 a = (rs1 >> (i * 32)) & 0xffff; + s32 b = (rs2 >> (i * 32)) & 0xffff; + + if (a != b) + rd_val |= 1 << i; + } + break; + + case FCMPEQ16_OPF: + for (i = 0; i < 4; i++) { + s16 a = (rs1 >> (i * 16)) & 0xffff; + s16 b = (rs2 >> (i * 16)) & 0xffff; + + if (a == b) + rd_val |= 1 << i; + } + break; + + case FCMPEQ32_OPF: + for (i = 0; i < 2; i++) { + s32 a = (rs1 >> (i * 32)) & 0xffff; + s32 b = (rs2 >> (i * 32)) & 0xffff; + + if (a == b) + rd_val |= 1 << i; + } + break; + }; + + maybe_flush_windows(0, 0, RD(insn), 0); + store_reg(regs, rd_val, RD(insn)); +} + +/* Emulate the VIS instructions which are not implemented in + * hardware on Niagara. + */ +int vis_emul(struct pt_regs *regs, unsigned int insn) +{ + unsigned long pc = regs->tpc; + unsigned int opf; + + BUG_ON(regs->tstate & TSTATE_PRIV); + + if (test_thread_flag(TIF_32BIT)) + pc = (u32)pc; + + if (get_user(insn, (u32 __user *) pc)) + return -EFAULT; + + if ((insn & VIS_OPCODE_MASK) != VIS_OPCODE_VAL) + return -EINVAL; + + opf = (insn & VIS_OPF_MASK) >> VIS_OPF_SHIFT; + switch (opf) { + default: + return -EINVAL; + + /* Pixel Formatting Instructions. */ + case FPACK16_OPF: + case FPACK32_OPF: + case FPACKFIX_OPF: + case FEXPAND_OPF: + case FPMERGE_OPF: + pformat(regs, insn, opf); + break; + + /* Partitioned Multiply Instructions */ + case FMUL8x16_OPF: + case FMUL8x16AU_OPF: + case FMUL8x16AL_OPF: + case FMUL8SUx16_OPF: + case FMUL8ULx16_OPF: + case FMULD8SUx16_OPF: + case FMULD8ULx16_OPF: + pmul(regs, insn, opf); + break; + + /* Pixel Compare Instructions */ + case FCMPGT16_OPF: + case FCMPGT32_OPF: + case FCMPLE16_OPF: + case FCMPLE32_OPF: + case FCMPNE16_OPF: + case FCMPNE32_OPF: + case FCMPEQ16_OPF: + case FCMPEQ32_OPF: + pcmp(regs, insn, opf); + break; + + /* Edge Handling Instructions */ + case EDGE8_OPF: + case EDGE8N_OPF: + case EDGE8L_OPF: + case EDGE8LN_OPF: + case EDGE16_OPF: + case EDGE16N_OPF: + case EDGE16L_OPF: + case EDGE16LN_OPF: + case EDGE32_OPF: + case EDGE32N_OPF: + case EDGE32L_OPF: + case EDGE32LN_OPF: + edge(regs, insn, opf); + break; + + /* Pixel Component Distance */ + case PDIST_OPF: + pdist(regs, insn); + break; + + /* Three-Dimensional Array Addressing Instructions */ + case ARRAY8_OPF: + case ARRAY16_OPF: + case ARRAY32_OPF: + array(regs, insn, opf); + break; + + /* Byte Mask and Shuffle Instructions */ + case BMASK_OPF: + bmask(regs, insn); + break; + + case BSHUFFLE_OPF: + bshuffle(regs, insn); + break; + }; + + regs->tpc = regs->tnpc; + regs->tnpc += 4; + return 0; +} diff --git a/arch/sparc64/kernel/vmlinux.lds.S b/arch/sparc64/kernel/vmlinux.lds.S index 467d13a0d5c..b097379a49a 100644 --- a/arch/sparc64/kernel/vmlinux.lds.S +++ b/arch/sparc64/kernel/vmlinux.lds.S @@ -70,6 +70,22 @@ SECTIONS .con_initcall.init : { *(.con_initcall.init) } __con_initcall_end = .; SECURITY_INIT + . = ALIGN(4); + __tsb_ldquad_phys_patch = .; + .tsb_ldquad_phys_patch : { *(.tsb_ldquad_phys_patch) } + __tsb_ldquad_phys_patch_end = .; + __tsb_phys_patch = .; + .tsb_phys_patch : { *(.tsb_phys_patch) } + __tsb_phys_patch_end = .; + __cpuid_patch = .; + .cpuid_patch : { *(.cpuid_patch) } + __cpuid_patch_end = .; + __sun4v_1insn_patch = .; + .sun4v_1insn_patch : { *(.sun4v_1insn_patch) } + __sun4v_1insn_patch_end = .; + __sun4v_2insn_patch = .; + .sun4v_2insn_patch : { *(.sun4v_2insn_patch) } + __sun4v_2insn_patch_end = .; . = ALIGN(8192); __initramfs_start = .; .init.ramfs : { *(.init.ramfs) } diff --git a/arch/sparc64/kernel/winfixup.S b/arch/sparc64/kernel/winfixup.S index 39160926267..c4aa110a10e 100644 --- a/arch/sparc64/kernel/winfixup.S +++ b/arch/sparc64/kernel/winfixup.S @@ -1,8 +1,6 @@ -/* $Id: winfixup.S,v 1.30 2002/02/09 19:49:30 davem Exp $ +/* winfixup.S: Handle cases where user stack pointer is found to be bogus. * - * winfixup.S: Handle cases where user stack pointer is found to be bogus. - * - * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1997, 2006 David S. Miller (davem@davemloft.net) */ #include <asm/asi.h> @@ -15,374 +13,144 @@ .text -set_pcontext: - sethi %hi(sparc64_kern_pri_context), %l1 - ldx [%l1 + %lo(sparc64_kern_pri_context)], %l1 - mov PRIMARY_CONTEXT, %g1 - stxa %l1, [%g1] ASI_DMMU - flush %g6 - retl - nop + /* It used to be the case that these register window fault + * handlers could run via the save and restore instructions + * done by the trap entry and exit code. They now do the + * window spill/fill by hand, so that case no longer can occur. + */ .align 32 - - /* Here are the rules, pay attention. - * - * The kernel is disallowed from touching user space while - * the trap level is greater than zero, except for from within - * the window spill/fill handlers. This must be followed - * so that we can easily detect the case where we tried to - * spill/fill with a bogus (or unmapped) user stack pointer. - * - * These are layed out in a special way for cache reasons, - * don't touch... - */ - .globl fill_fixup, spill_fixup fill_fixup: - rdpr %tstate, %g1 - andcc %g1, TSTATE_PRIV, %g0 - or %g4, FAULT_CODE_WINFIXUP, %g4 - be,pt %xcc, window_scheisse_from_user_common - and %g1, TSTATE_CWP, %g1 - - /* This is the extremely complex case, but it does happen from - * time to time if things are just right. Essentially the restore - * done in rtrap right before going back to user mode, with tl=1 - * and that levels trap stack registers all setup, took a fill trap, - * the user stack was not mapped in the tlb, and tlb miss occurred, - * the pte found was not valid, and a simple ref bit watch update - * could not satisfy the miss, so we got here. - * - * We must carefully unwind the state so we get back to tl=0, preserve - * all the register values we were going to give to the user. Luckily - * most things are where they need to be, we also have the address - * which triggered the fault handy as well. - * - * Also note that we must preserve %l5 and %l6. If the user was - * returning from a system call, we must make it look this way - * after we process the fill fault on the users stack. - * - * First, get into the window where the original restore was executed. - */ - - rdpr %wstate, %g2 ! Grab user mode wstate. - wrpr %g1, %cwp ! Get into the right window. - sll %g2, 3, %g2 ! NORMAL-->OTHER - - wrpr %g0, 0x0, %canrestore ! Standard etrap stuff. - wrpr %g2, 0x0, %wstate ! This must be consistent. - wrpr %g0, 0x0, %otherwin ! We know this. - call set_pcontext ! Change contexts... + TRAP_LOAD_THREAD_REG(%g6, %g1) + rdpr %tstate, %g1 + and %g1, TSTATE_CWP, %g1 + or %g4, FAULT_CODE_WINFIXUP, %g4 + stb %g4, [%g6 + TI_FAULT_CODE] + stx %g5, [%g6 + TI_FAULT_ADDR] + wrpr %g1, %cwp + ba,pt %xcc, etrap + rd %pc, %g7 + call do_sparc64_fault + add %sp, PTREGS_OFF, %o0 + ba,pt %xcc, rtrap_clr_l6 nop - rdpr %pstate, %l1 ! Prepare to change globals. - mov %g6, %o7 ! Get current. - - andn %l1, PSTATE_MM, %l1 ! We want to be in RMO - stb %g4, [%g6 + TI_FAULT_CODE] - stx %g5, [%g6 + TI_FAULT_ADDR] - wrpr %g0, 0x0, %tl ! Out of trap levels. - wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate - mov %o7, %g6 - ldx [%g6 + TI_TASK], %g4 -#ifdef CONFIG_SMP - mov TSB_REG, %g1 - ldxa [%g1] ASI_IMMU, %g5 -#endif - /* This is the same as below, except we handle this a bit special - * since we must preserve %l5 and %l6, see comment above. - */ - call do_sparc64_fault - add %sp, PTREGS_OFF, %o0 - ba,pt %xcc, rtrap - nop ! yes, nop is correct - - /* Be very careful about usage of the alternate globals here. - * You cannot touch %g4/%g5 as that has the fault information - * should this be from usermode. Also be careful for the case - * where we get here from the save instruction in etrap.S when - * coming from either user or kernel (does not matter which, it - * is the same problem in both cases). Essentially this means - * do not touch %g7 or %g2 so we handle the two cases fine. + /* Be very careful about usage of the trap globals here. + * You cannot touch %g5 as that has the fault information. */ spill_fixup: - ldx [%g6 + TI_FLAGS], %g1 - andcc %g1, _TIF_32BIT, %g0 - ldub [%g6 + TI_WSAVED], %g1 - - sll %g1, 3, %g3 - add %g6, %g3, %g3 - stx %sp, [%g3 + TI_RWIN_SPTRS] - sll %g1, 7, %g3 - bne,pt %xcc, 1f - add %g6, %g3, %g3 - stx %l0, [%g3 + TI_REG_WINDOW + 0x00] - stx %l1, [%g3 + TI_REG_WINDOW + 0x08] - - stx %l2, [%g3 + TI_REG_WINDOW + 0x10] - stx %l3, [%g3 + TI_REG_WINDOW + 0x18] - stx %l4, [%g3 + TI_REG_WINDOW + 0x20] - stx %l5, [%g3 + TI_REG_WINDOW + 0x28] - stx %l6, [%g3 + TI_REG_WINDOW + 0x30] - stx %l7, [%g3 + TI_REG_WINDOW + 0x38] - stx %i0, [%g3 + TI_REG_WINDOW + 0x40] - stx %i1, [%g3 + TI_REG_WINDOW + 0x48] - - stx %i2, [%g3 + TI_REG_WINDOW + 0x50] - stx %i3, [%g3 + TI_REG_WINDOW + 0x58] - stx %i4, [%g3 + TI_REG_WINDOW + 0x60] - stx %i5, [%g3 + TI_REG_WINDOW + 0x68] - stx %i6, [%g3 + TI_REG_WINDOW + 0x70] - b,pt %xcc, 2f - stx %i7, [%g3 + TI_REG_WINDOW + 0x78] -1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00] - - stw %l1, [%g3 + TI_REG_WINDOW + 0x04] - stw %l2, [%g3 + TI_REG_WINDOW + 0x08] - stw %l3, [%g3 + TI_REG_WINDOW + 0x0c] - stw %l4, [%g3 + TI_REG_WINDOW + 0x10] - stw %l5, [%g3 + TI_REG_WINDOW + 0x14] - stw %l6, [%g3 + TI_REG_WINDOW + 0x18] - stw %l7, [%g3 + TI_REG_WINDOW + 0x1c] - stw %i0, [%g3 + TI_REG_WINDOW + 0x20] - - stw %i1, [%g3 + TI_REG_WINDOW + 0x24] - stw %i2, [%g3 + TI_REG_WINDOW + 0x28] - stw %i3, [%g3 + TI_REG_WINDOW + 0x2c] - stw %i4, [%g3 + TI_REG_WINDOW + 0x30] - stw %i5, [%g3 + TI_REG_WINDOW + 0x34] - stw %i6, [%g3 + TI_REG_WINDOW + 0x38] - stw %i7, [%g3 + TI_REG_WINDOW + 0x3c] -2: add %g1, 1, %g1 - - stb %g1, [%g6 + TI_WSAVED] - rdpr %tstate, %g1 - andcc %g1, TSTATE_PRIV, %g0 +spill_fixup_mna: +spill_fixup_dax: + TRAP_LOAD_THREAD_REG(%g6, %g1) + ldx [%g6 + TI_FLAGS], %g1 + andcc %g1, _TIF_32BIT, %g0 + ldub [%g6 + TI_WSAVED], %g1 + sll %g1, 3, %g3 + add %g6, %g3, %g3 + stx %sp, [%g3 + TI_RWIN_SPTRS] + sll %g1, 7, %g3 + bne,pt %xcc, 1f + add %g6, %g3, %g3 + stx %l0, [%g3 + TI_REG_WINDOW + 0x00] + stx %l1, [%g3 + TI_REG_WINDOW + 0x08] + stx %l2, [%g3 + TI_REG_WINDOW + 0x10] + stx %l3, [%g3 + TI_REG_WINDOW + 0x18] + stx %l4, [%g3 + TI_REG_WINDOW + 0x20] + stx %l5, [%g3 + TI_REG_WINDOW + 0x28] + stx %l6, [%g3 + TI_REG_WINDOW + 0x30] + stx %l7, [%g3 + TI_REG_WINDOW + 0x38] + stx %i0, [%g3 + TI_REG_WINDOW + 0x40] + stx %i1, [%g3 + TI_REG_WINDOW + 0x48] + stx %i2, [%g3 + TI_REG_WINDOW + 0x50] + stx %i3, [%g3 + TI_REG_WINDOW + 0x58] + stx %i4, [%g3 + TI_REG_WINDOW + 0x60] + stx %i5, [%g3 + TI_REG_WINDOW + 0x68] + stx %i6, [%g3 + TI_REG_WINDOW + 0x70] + ba,pt %xcc, 2f + stx %i7, [%g3 + TI_REG_WINDOW + 0x78] +1: stw %l0, [%g3 + TI_REG_WINDOW + 0x00] + stw %l1, [%g3 + TI_REG_WINDOW + 0x04] + stw %l2, [%g3 + TI_REG_WINDOW + 0x08] + stw %l3, [%g3 + TI_REG_WINDOW + 0x0c] + stw %l4, [%g3 + TI_REG_WINDOW + 0x10] + stw %l5, [%g3 + TI_REG_WINDOW + 0x14] + stw %l6, [%g3 + TI_REG_WINDOW + 0x18] + stw %l7, [%g3 + TI_REG_WINDOW + 0x1c] + stw %i0, [%g3 + TI_REG_WINDOW + 0x20] + stw %i1, [%g3 + TI_REG_WINDOW + 0x24] + stw %i2, [%g3 + TI_REG_WINDOW + 0x28] + stw %i3, [%g3 + TI_REG_WINDOW + 0x2c] + stw %i4, [%g3 + TI_REG_WINDOW + 0x30] + stw %i5, [%g3 + TI_REG_WINDOW + 0x34] + stw %i6, [%g3 + TI_REG_WINDOW + 0x38] + stw %i7, [%g3 + TI_REG_WINDOW + 0x3c] +2: add %g1, 1, %g1 + stb %g1, [%g6 + TI_WSAVED] + rdpr %tstate, %g1 + andcc %g1, TSTATE_PRIV, %g0 saved - and %g1, TSTATE_CWP, %g1 - be,pn %xcc, window_scheisse_from_user_common - mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4 + be,pn %xcc, 1f + and %g1, TSTATE_CWP, %g1 retry +1: mov FAULT_CODE_WRITE | FAULT_CODE_DTLB | FAULT_CODE_WINFIXUP, %g4 + stb %g4, [%g6 + TI_FAULT_CODE] + stx %g5, [%g6 + TI_FAULT_ADDR] + wrpr %g1, %cwp + ba,pt %xcc, etrap + rd %pc, %g7 + call do_sparc64_fault + add %sp, PTREGS_OFF, %o0 + ba,a,pt %xcc, rtrap_clr_l6 -window_scheisse_from_user_common: - stb %g4, [%g6 + TI_FAULT_CODE] - stx %g5, [%g6 + TI_FAULT_ADDR] - wrpr %g1, %cwp - ba,pt %xcc, etrap - rd %pc, %g7 - call do_sparc64_fault - add %sp, PTREGS_OFF, %o0 - ba,a,pt %xcc, rtrap_clr_l6 - - .globl winfix_mna, fill_fixup_mna, spill_fixup_mna winfix_mna: - andn %g3, 0x7f, %g3 - add %g3, 0x78, %g3 - wrpr %g3, %tnpc + andn %g3, 0x7f, %g3 + add %g3, 0x78, %g3 + wrpr %g3, %tnpc done -fill_fixup_mna: - rdpr %tstate, %g1 - andcc %g1, TSTATE_PRIV, %g0 - be,pt %xcc, window_mna_from_user_common - and %g1, TSTATE_CWP, %g1 - /* Please, see fill_fixup commentary about why we must preserve - * %l5 and %l6 to preserve absolute correct semantics. - */ - rdpr %wstate, %g2 ! Grab user mode wstate. - wrpr %g1, %cwp ! Get into the right window. - sll %g2, 3, %g2 ! NORMAL-->OTHER - wrpr %g0, 0x0, %canrestore ! Standard etrap stuff. - - wrpr %g2, 0x0, %wstate ! This must be consistent. - wrpr %g0, 0x0, %otherwin ! We know this. - call set_pcontext ! Change contexts... +fill_fixup_mna: + rdpr %tstate, %g1 + and %g1, TSTATE_CWP, %g1 + wrpr %g1, %cwp + ba,pt %xcc, etrap + rd %pc, %g7 + sethi %hi(tlb_type), %g1 + lduw [%g1 + %lo(tlb_type)], %g1 + cmp %g1, 3 + bne,pt %icc, 1f + add %sp, PTREGS_OFF, %o0 + mov %l4, %o2 + call sun4v_do_mna + mov %l5, %o1 + ba,a,pt %xcc, rtrap_clr_l6 +1: mov %l4, %o1 + mov %l5, %o2 + call mem_address_unaligned nop - rdpr %pstate, %l1 ! Prepare to change globals. - mov %g4, %o2 ! Setup args for - mov %g5, %o1 ! final call to mem_address_unaligned. - andn %l1, PSTATE_MM, %l1 ! We want to be in RMO + ba,a,pt %xcc, rtrap_clr_l6 - mov %g6, %o7 ! Stash away current. - wrpr %g0, 0x0, %tl ! Out of trap levels. - wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate - mov %o7, %g6 ! Get current back. - ldx [%g6 + TI_TASK], %g4 ! Finish it. -#ifdef CONFIG_SMP - mov TSB_REG, %g1 - ldxa [%g1] ASI_IMMU, %g5 -#endif - call mem_address_unaligned - add %sp, PTREGS_OFF, %o0 - - b,pt %xcc, rtrap - nop ! yes, the nop is correct -spill_fixup_mna: - ldx [%g6 + TI_FLAGS], %g1 - andcc %g1, _TIF_32BIT, %g0 - ldub [%g6 + TI_WSAVED], %g1 - sll %g1, 3, %g3 - add %g6, %g3, %g3 - stx %sp, [%g3 + TI_RWIN_SPTRS] - - sll %g1, 7, %g3 - bne,pt %xcc, 1f - add %g6, %g3, %g3 - stx %l0, [%g3 + TI_REG_WINDOW + 0x00] - stx %l1, [%g3 + TI_REG_WINDOW + 0x08] - stx %l2, [%g3 + TI_REG_WINDOW + 0x10] - stx %l3, [%g3 + TI_REG_WINDOW + 0x18] - stx %l4, [%g3 + TI_REG_WINDOW + 0x20] - - stx %l5, [%g3 + TI_REG_WINDOW + 0x28] - stx %l6, [%g3 + TI_REG_WINDOW + 0x30] - stx %l7, [%g3 + TI_REG_WINDOW + 0x38] - stx %i0, [%g3 + TI_REG_WINDOW + 0x40] - stx %i1, [%g3 + TI_REG_WINDOW + 0x48] - stx %i2, [%g3 + TI_REG_WINDOW + 0x50] - stx %i3, [%g3 + TI_REG_WINDOW + 0x58] - stx %i4, [%g3 + TI_REG_WINDOW + 0x60] - - stx %i5, [%g3 + TI_REG_WINDOW + 0x68] - stx %i6, [%g3 + TI_REG_WINDOW + 0x70] - stx %i7, [%g3 + TI_REG_WINDOW + 0x78] - b,pt %xcc, 2f - add %g1, 1, %g1 -1: std %l0, [%g3 + TI_REG_WINDOW + 0x00] - std %l2, [%g3 + TI_REG_WINDOW + 0x08] - std %l4, [%g3 + TI_REG_WINDOW + 0x10] - - std %l6, [%g3 + TI_REG_WINDOW + 0x18] - std %i0, [%g3 + TI_REG_WINDOW + 0x20] - std %i2, [%g3 + TI_REG_WINDOW + 0x28] - std %i4, [%g3 + TI_REG_WINDOW + 0x30] - std %i6, [%g3 + TI_REG_WINDOW + 0x38] - add %g1, 1, %g1 -2: stb %g1, [%g6 + TI_WSAVED] - rdpr %tstate, %g1 - - andcc %g1, TSTATE_PRIV, %g0 - saved - be,pn %xcc, window_mna_from_user_common - and %g1, TSTATE_CWP, %g1 - retry -window_mna_from_user_common: - wrpr %g1, %cwp - sethi %hi(109f), %g7 - ba,pt %xcc, etrap -109: or %g7, %lo(109b), %g7 - mov %l4, %o2 - mov %l5, %o1 - call mem_address_unaligned - add %sp, PTREGS_OFF, %o0 - ba,pt %xcc, rtrap - clr %l6 - - /* These are only needed for 64-bit mode processes which - * put their stack pointer into the VPTE area and there - * happens to be a VPTE tlb entry mapped there during - * a spill/fill trap to that stack frame. - */ - .globl winfix_dax, fill_fixup_dax, spill_fixup_dax winfix_dax: - andn %g3, 0x7f, %g3 - add %g3, 0x74, %g3 - wrpr %g3, %tnpc + andn %g3, 0x7f, %g3 + add %g3, 0x74, %g3 + wrpr %g3, %tnpc done -fill_fixup_dax: - rdpr %tstate, %g1 - andcc %g1, TSTATE_PRIV, %g0 - be,pt %xcc, window_dax_from_user_common - and %g1, TSTATE_CWP, %g1 - - /* Please, see fill_fixup commentary about why we must preserve - * %l5 and %l6 to preserve absolute correct semantics. - */ - rdpr %wstate, %g2 ! Grab user mode wstate. - wrpr %g1, %cwp ! Get into the right window. - sll %g2, 3, %g2 ! NORMAL-->OTHER - wrpr %g0, 0x0, %canrestore ! Standard etrap stuff. - wrpr %g2, 0x0, %wstate ! This must be consistent. - wrpr %g0, 0x0, %otherwin ! We know this. - call set_pcontext ! Change contexts... +fill_fixup_dax: + rdpr %tstate, %g1 + and %g1, TSTATE_CWP, %g1 + wrpr %g1, %cwp + ba,pt %xcc, etrap + rd %pc, %g7 + sethi %hi(tlb_type), %g1 + mov %l4, %o1 + lduw [%g1 + %lo(tlb_type)], %g1 + mov %l5, %o2 + cmp %g1, 3 + bne,pt %icc, 1f + add %sp, PTREGS_OFF, %o0 + call sun4v_data_access_exception nop - rdpr %pstate, %l1 ! Prepare to change globals. - mov %g4, %o1 ! Setup args for - mov %g5, %o2 ! final call to spitfire_data_access_exception. - andn %l1, PSTATE_MM, %l1 ! We want to be in RMO - - mov %g6, %o7 ! Stash away current. - wrpr %g0, 0x0, %tl ! Out of trap levels. - wrpr %l1, (PSTATE_IE | PSTATE_AG | PSTATE_RMO), %pstate - mov %o7, %g6 ! Get current back. - ldx [%g6 + TI_TASK], %g4 ! Finish it. -#ifdef CONFIG_SMP - mov TSB_REG, %g1 - ldxa [%g1] ASI_IMMU, %g5 -#endif - call spitfire_data_access_exception - add %sp, PTREGS_OFF, %o0 - - b,pt %xcc, rtrap - nop ! yes, the nop is correct -spill_fixup_dax: - ldx [%g6 + TI_FLAGS], %g1 - andcc %g1, _TIF_32BIT, %g0 - ldub [%g6 + TI_WSAVED], %g1 - sll %g1, 3, %g3 - add %g6, %g3, %g3 - stx %sp, [%g3 + TI_RWIN_SPTRS] - - sll %g1, 7, %g3 - bne,pt %xcc, 1f - add %g6, %g3, %g3 - stx %l0, [%g3 + TI_REG_WINDOW + 0x00] - stx %l1, [%g3 + TI_REG_WINDOW + 0x08] - stx %l2, [%g3 + TI_REG_WINDOW + 0x10] - stx %l3, [%g3 + TI_REG_WINDOW + 0x18] - stx %l4, [%g3 + TI_REG_WINDOW + 0x20] - - stx %l5, [%g3 + TI_REG_WINDOW + 0x28] - stx %l6, [%g3 + TI_REG_WINDOW + 0x30] - stx %l7, [%g3 + TI_REG_WINDOW + 0x38] - stx %i0, [%g3 + TI_REG_WINDOW + 0x40] - stx %i1, [%g3 + TI_REG_WINDOW + 0x48] - stx %i2, [%g3 + TI_REG_WINDOW + 0x50] - stx %i3, [%g3 + TI_REG_WINDOW + 0x58] - stx %i4, [%g3 + TI_REG_WINDOW + 0x60] - - stx %i5, [%g3 + TI_REG_WINDOW + 0x68] - stx %i6, [%g3 + TI_REG_WINDOW + 0x70] - stx %i7, [%g3 + TI_REG_WINDOW + 0x78] - b,pt %xcc, 2f - add %g1, 1, %g1 -1: std %l0, [%g3 + TI_REG_WINDOW + 0x00] - std %l2, [%g3 + TI_REG_WINDOW + 0x08] - std %l4, [%g3 + TI_REG_WINDOW + 0x10] - - std %l6, [%g3 + TI_REG_WINDOW + 0x18] - std %i0, [%g3 + TI_REG_WINDOW + 0x20] - std %i2, [%g3 + TI_REG_WINDOW + 0x28] - std %i4, [%g3 + TI_REG_WINDOW + 0x30] - std %i6, [%g3 + TI_REG_WINDOW + 0x38] - add %g1, 1, %g1 -2: stb %g1, [%g6 + TI_WSAVED] - rdpr %tstate, %g1 - - andcc %g1, TSTATE_PRIV, %g0 - saved - be,pn %xcc, window_dax_from_user_common - and %g1, TSTATE_CWP, %g1 - retry -window_dax_from_user_common: - wrpr %g1, %cwp - sethi %hi(109f), %g7 - ba,pt %xcc, etrap -109: or %g7, %lo(109b), %g7 - mov %l4, %o1 - mov %l5, %o2 - call spitfire_data_access_exception - add %sp, PTREGS_OFF, %o0 - ba,pt %xcc, rtrap - clr %l6 + ba,a,pt %xcc, rtrap_clr_l6 +1: call spitfire_data_access_exception + nop + ba,a,pt %xcc, rtrap_clr_l6 |