diff options
Diffstat (limited to 'arch/sparc64/mm/init.c')
| -rw-r--r-- | arch/sparc64/mm/init.c | 2360 |
1 files changed, 0 insertions, 2360 deletions
diff --git a/arch/sparc64/mm/init.c b/arch/sparc64/mm/init.c deleted file mode 100644 index 4bd63968400..00000000000 --- a/arch/sparc64/mm/init.c +++ /dev/null @@ -1,2360 +0,0 @@ -/* - * arch/sparc64/mm/init.c - * - * Copyright (C) 1996-1999 David S. Miller (davem@caip.rutgers.edu) - * Copyright (C) 1997-1999 Jakub Jelinek (jj@sunsite.mff.cuni.cz) - */ - -#include <linux/module.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/init.h> -#include <linux/bootmem.h> -#include <linux/mm.h> -#include <linux/hugetlb.h> -#include <linux/slab.h> -#include <linux/initrd.h> -#include <linux/swap.h> -#include <linux/pagemap.h> -#include <linux/poison.h> -#include <linux/fs.h> -#include <linux/seq_file.h> -#include <linux/kprobes.h> -#include <linux/cache.h> -#include <linux/sort.h> -#include <linux/percpu.h> -#include <linux/lmb.h> -#include <linux/mmzone.h> - -#include <asm/head.h> -#include <asm/system.h> -#include <asm/page.h> -#include <asm/pgalloc.h> -#include <asm/pgtable.h> -#include <asm/oplib.h> -#include <asm/iommu.h> -#include <asm/io.h> -#include <asm/uaccess.h> -#include <asm/mmu_context.h> -#include <asm/tlbflush.h> -#include <asm/dma.h> -#include <asm/starfire.h> -#include <asm/tlb.h> -#include <asm/spitfire.h> -#include <asm/sections.h> -#include <asm/tsb.h> -#include <asm/hypervisor.h> -#include <asm/prom.h> -#include <asm/mdesc.h> -#include <asm/cpudata.h> -#include <asm/irq.h> - -#include "init.h" - -unsigned long kern_linear_pte_xor[2] __read_mostly; - -/* A bitmap, one bit for every 256MB of physical memory. If the bit - * is clear, we should use a 4MB page (via kern_linear_pte_xor[0]) else - * if set we should use a 256MB page (via kern_linear_pte_xor[1]). - */ -unsigned long kpte_linear_bitmap[KPTE_BITMAP_BYTES / sizeof(unsigned long)]; - -#ifndef CONFIG_DEBUG_PAGEALLOC -/* A special kernel TSB for 4MB and 256MB linear mappings. - * Space is allocated for this right after the trap table - * in arch/sparc64/kernel/head.S - */ -extern struct tsb swapper_4m_tsb[KERNEL_TSB4M_NENTRIES]; -#endif - -#define MAX_BANKS 32 - -static struct linux_prom64_registers pavail[MAX_BANKS] __initdata; -static int pavail_ents __initdata; - -static int cmp_p64(const void *a, const void *b) -{ - const struct linux_prom64_registers *x = a, *y = b; - - if (x->phys_addr > y->phys_addr) - return 1; - if (x->phys_addr < y->phys_addr) - return -1; - return 0; -} - -static void __init read_obp_memory(const char *property, - struct linux_prom64_registers *regs, - int *num_ents) -{ - int node = prom_finddevice("/memory"); - int prop_size = prom_getproplen(node, property); - int ents, ret, i; - - ents = prop_size / sizeof(struct linux_prom64_registers); - if (ents > MAX_BANKS) { - prom_printf("The machine has more %s property entries than " - "this kernel can support (%d).\n", - property, MAX_BANKS); - prom_halt(); - } - - ret = prom_getproperty(node, property, (char *) regs, prop_size); - if (ret == -1) { - prom_printf("Couldn't get %s property from /memory.\n"); - prom_halt(); - } - - /* Sanitize what we got from the firmware, by page aligning - * everything. - */ - for (i = 0; i < ents; i++) { - unsigned long base, size; - - base = regs[i].phys_addr; - size = regs[i].reg_size; - - size &= PAGE_MASK; - if (base & ~PAGE_MASK) { - unsigned long new_base = PAGE_ALIGN(base); - - size -= new_base - base; - if ((long) size < 0L) - size = 0UL; - base = new_base; - } - if (size == 0UL) { - /* If it is empty, simply get rid of it. - * This simplifies the logic of the other - * functions that process these arrays. - */ - memmove(®s[i], ®s[i + 1], - (ents - i - 1) * sizeof(regs[0])); - i--; - ents--; - continue; - } - regs[i].phys_addr = base; - regs[i].reg_size = size; - } - - *num_ents = ents; - - sort(regs, ents, sizeof(struct linux_prom64_registers), - cmp_p64, NULL); -} - -unsigned long *sparc64_valid_addr_bitmap __read_mostly; - -/* Kernel physical address base and size in bytes. */ -unsigned long kern_base __read_mostly; -unsigned long kern_size __read_mostly; - -/* Initial ramdisk setup */ -extern unsigned long sparc_ramdisk_image64; -extern unsigned int sparc_ramdisk_image; -extern unsigned int sparc_ramdisk_size; - -struct page *mem_map_zero __read_mostly; -EXPORT_SYMBOL(mem_map_zero); - -unsigned int sparc64_highest_unlocked_tlb_ent __read_mostly; - -unsigned long sparc64_kern_pri_context __read_mostly; -unsigned long sparc64_kern_pri_nuc_bits __read_mostly; -unsigned long sparc64_kern_sec_context __read_mostly; - -int num_kernel_image_mappings; - -#ifdef CONFIG_DEBUG_DCFLUSH -atomic_t dcpage_flushes = ATOMIC_INIT(0); -#ifdef CONFIG_SMP -atomic_t dcpage_flushes_xcall = ATOMIC_INIT(0); -#endif -#endif - -inline void flush_dcache_page_impl(struct page *page) -{ - BUG_ON(tlb_type == hypervisor); -#ifdef CONFIG_DEBUG_DCFLUSH - atomic_inc(&dcpage_flushes); -#endif - -#ifdef DCACHE_ALIASING_POSSIBLE - __flush_dcache_page(page_address(page), - ((tlb_type == spitfire) && - page_mapping(page) != NULL)); -#else - if (page_mapping(page) != NULL && - tlb_type == spitfire) - __flush_icache_page(__pa(page_address(page))); -#endif -} - -#define PG_dcache_dirty PG_arch_1 -#define PG_dcache_cpu_shift 32UL -#define PG_dcache_cpu_mask \ - ((1UL<<ilog2(roundup_pow_of_two(NR_CPUS)))-1UL) - -#define dcache_dirty_cpu(page) \ - (((page)->flags >> PG_dcache_cpu_shift) & PG_dcache_cpu_mask) - -static inline void set_dcache_dirty(struct page *page, int this_cpu) -{ - unsigned long mask = this_cpu; - unsigned long non_cpu_bits; - - non_cpu_bits = ~(PG_dcache_cpu_mask << PG_dcache_cpu_shift); - mask = (mask << PG_dcache_cpu_shift) | (1UL << PG_dcache_dirty); - - __asm__ __volatile__("1:\n\t" - "ldx [%2], %%g7\n\t" - "and %%g7, %1, %%g1\n\t" - "or %%g1, %0, %%g1\n\t" - "casx [%2], %%g7, %%g1\n\t" - "cmp %%g7, %%g1\n\t" - "bne,pn %%xcc, 1b\n\t" - " nop" - : /* no outputs */ - : "r" (mask), "r" (non_cpu_bits), "r" (&page->flags) - : "g1", "g7"); -} - -static inline void clear_dcache_dirty_cpu(struct page *page, unsigned long cpu) -{ - unsigned long mask = (1UL << PG_dcache_dirty); - - __asm__ __volatile__("! test_and_clear_dcache_dirty\n" - "1:\n\t" - "ldx [%2], %%g7\n\t" - "srlx %%g7, %4, %%g1\n\t" - "and %%g1, %3, %%g1\n\t" - "cmp %%g1, %0\n\t" - "bne,pn %%icc, 2f\n\t" - " andn %%g7, %1, %%g1\n\t" - "casx [%2], %%g7, %%g1\n\t" - "cmp %%g7, %%g1\n\t" - "bne,pn %%xcc, 1b\n\t" - " nop\n" - "2:" - : /* no outputs */ - : "r" (cpu), "r" (mask), "r" (&page->flags), - "i" (PG_dcache_cpu_mask), - "i" (PG_dcache_cpu_shift) - : "g1", "g7"); -} - -static inline void tsb_insert(struct tsb *ent, unsigned long tag, unsigned long pte) -{ - unsigned long tsb_addr = (unsigned long) ent; - - if (tlb_type == cheetah_plus || tlb_type == hypervisor) - tsb_addr = __pa(tsb_addr); - - __tsb_insert(tsb_addr, tag, pte); -} - -unsigned long _PAGE_ALL_SZ_BITS __read_mostly; -unsigned long _PAGE_SZBITS __read_mostly; - -void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, pte_t pte) -{ - struct mm_struct *mm; - struct tsb *tsb; - unsigned long tag, flags; - unsigned long tsb_index, tsb_hash_shift; - - if (tlb_type != hypervisor) { - unsigned long pfn = pte_pfn(pte); - unsigned long pg_flags; - struct page *page; - - if (pfn_valid(pfn) && - (page = pfn_to_page(pfn), page_mapping(page)) && - ((pg_flags = page->flags) & (1UL << PG_dcache_dirty))) { - int cpu = ((pg_flags >> PG_dcache_cpu_shift) & - PG_dcache_cpu_mask); - int this_cpu = get_cpu(); - - /* This is just to optimize away some function calls - * in the SMP case. - */ - if (cpu == this_cpu) - flush_dcache_page_impl(page); - else - smp_flush_dcache_page_impl(page, cpu); - - clear_dcache_dirty_cpu(page, cpu); - - put_cpu(); - } - } - - mm = vma->vm_mm; - - tsb_index = MM_TSB_BASE; - tsb_hash_shift = PAGE_SHIFT; - - spin_lock_irqsave(&mm->context.lock, flags); - -#ifdef CONFIG_HUGETLB_PAGE - if (mm->context.tsb_block[MM_TSB_HUGE].tsb != NULL) { - if ((tlb_type == hypervisor && - (pte_val(pte) & _PAGE_SZALL_4V) == _PAGE_SZHUGE_4V) || - (tlb_type != hypervisor && - (pte_val(pte) & _PAGE_SZALL_4U) == _PAGE_SZHUGE_4U)) { - tsb_index = MM_TSB_HUGE; - tsb_hash_shift = HPAGE_SHIFT; - } - } -#endif - - tsb = mm->context.tsb_block[tsb_index].tsb; - tsb += ((address >> tsb_hash_shift) & - (mm->context.tsb_block[tsb_index].tsb_nentries - 1UL)); - tag = (address >> 22UL); - tsb_insert(tsb, tag, pte_val(pte)); - - spin_unlock_irqrestore(&mm->context.lock, flags); -} - -void flush_dcache_page(struct page *page) -{ - struct address_space *mapping; - int this_cpu; - - if (tlb_type == hypervisor) - return; - - /* Do not bother with the expensive D-cache flush if it - * is merely the zero page. The 'bigcore' testcase in GDB - * causes this case to run millions of times. - */ - if (page == ZERO_PAGE(0)) - return; - - this_cpu = get_cpu(); - - mapping = page_mapping(page); - if (mapping && !mapping_mapped(mapping)) { - int dirty = test_bit(PG_dcache_dirty, &page->flags); - if (dirty) { - int dirty_cpu = dcache_dirty_cpu(page); - - if (dirty_cpu == this_cpu) - goto out; - smp_flush_dcache_page_impl(page, dirty_cpu); - } - set_dcache_dirty(page, this_cpu); - } else { - /* We could delay the flush for the !page_mapping - * case too. But that case is for exec env/arg - * pages and those are %99 certainly going to get - * faulted into the tlb (and thus flushed) anyways. - */ - flush_dcache_page_impl(page); - } - -out: - put_cpu(); -} - -void __kprobes flush_icache_range(unsigned long start, unsigned long end) -{ - /* Cheetah and Hypervisor platform cpus have coherent I-cache. */ - if (tlb_type == spitfire) { - unsigned long kaddr; - - /* This code only runs on Spitfire cpus so this is - * why we can assume _PAGE_PADDR_4U. - */ - for (kaddr = start; kaddr < end; kaddr += PAGE_SIZE) { - unsigned long paddr, mask = _PAGE_PADDR_4U; - - if (kaddr >= PAGE_OFFSET) - paddr = kaddr & mask; - else { - pgd_t *pgdp = pgd_offset_k(kaddr); - pud_t *pudp = pud_offset(pgdp, kaddr); - pmd_t *pmdp = pmd_offset(pudp, kaddr); - pte_t *ptep = pte_offset_kernel(pmdp, kaddr); - - paddr = pte_val(*ptep) & mask; - } - __flush_icache_page(paddr); - } - } -} - -void mmu_info(struct seq_file *m) -{ - if (tlb_type == cheetah) - seq_printf(m, "MMU Type\t: Cheetah\n"); - else if (tlb_type == cheetah_plus) - seq_printf(m, "MMU Type\t: Cheetah+\n"); - else if (tlb_type == spitfire) - seq_printf(m, "MMU Type\t: Spitfire\n"); - else if (tlb_type == hypervisor) - seq_printf(m, "MMU Type\t: Hypervisor (sun4v)\n"); - else - seq_printf(m, "MMU Type\t: ???\n"); - -#ifdef CONFIG_DEBUG_DCFLUSH - seq_printf(m, "DCPageFlushes\t: %d\n", - atomic_read(&dcpage_flushes)); -#ifdef CONFIG_SMP - seq_printf(m, "DCPageFlushesXC\t: %d\n", - atomic_read(&dcpage_flushes_xcall)); -#endif /* CONFIG_SMP */ -#endif /* CONFIG_DEBUG_DCFLUSH */ -} - -struct linux_prom_translation prom_trans[512] __read_mostly; -unsigned int prom_trans_ents __read_mostly; - -unsigned long kern_locked_tte_data; - -/* The obp translations are saved based on 8k pagesize, since obp can - * use a mixture of pagesizes. Misses to the LOW_OBP_ADDRESS -> - * HI_OBP_ADDRESS range are handled in ktlb.S. - */ -static inline int in_obp_range(unsigned long vaddr) -{ - return (vaddr >= LOW_OBP_ADDRESS && - vaddr < HI_OBP_ADDRESS); -} - -static int cmp_ptrans(const void *a, const void *b) -{ - const struct linux_prom_translation *x = a, *y = b; - - if (x->virt > y->virt) - return 1; - if (x->virt < y->virt) - return -1; - return 0; -} - -/* Read OBP translations property into 'prom_trans[]'. */ -static void __init read_obp_translations(void) -{ - int n, node, ents, first, last, i; - - node = prom_finddevice("/virtual-memory"); - n = prom_getproplen(node, "translations"); - if (unlikely(n == 0 || n == -1)) { - prom_printf("prom_mappings: Couldn't get size.\n"); - prom_halt(); - } - if (unlikely(n > sizeof(prom_trans))) { - prom_printf("prom_mappings: Size %Zd is too big.\n", n); - prom_halt(); - } - - if ((n = prom_getproperty(node, "translations", - (char *)&prom_trans[0], - sizeof(prom_trans))) == -1) { - prom_printf("prom_mappings: Couldn't get property.\n"); - prom_halt(); - } - - n = n / sizeof(struct linux_prom_translation); - - ents = n; - - sort(prom_trans, ents, sizeof(struct linux_prom_translation), - cmp_ptrans, NULL); - - /* Now kick out all the non-OBP entries. */ - for (i = 0; i < ents; i++) { - if (in_obp_range(prom_trans[i].virt)) - break; - } - first = i; - for (; i < ents; i++) { - if (!in_obp_range(prom_trans[i].virt)) - break; - } - last = i; - - for (i = 0; i < (last - first); i++) { - struct linux_prom_translation *src = &prom_trans[i + first]; - struct linux_prom_translation *dest = &prom_trans[i]; - - *dest = *src; - } - for (; i < ents; i++) { - struct linux_prom_translation *dest = &prom_trans[i]; - dest->virt = dest->size = dest->data = 0x0UL; - } - - prom_trans_ents = last - first; - - if (tlb_type == spitfire) { - /* Clear diag TTE bits. */ - for (i = 0; i < prom_trans_ents; i++) - prom_trans[i].data &= ~0x0003fe0000000000UL; - } -} - -static void __init hypervisor_tlb_lock(unsigned long vaddr, - unsigned long pte, - unsigned long mmu) -{ - unsigned long ret = sun4v_mmu_map_perm_addr(vaddr, 0, pte, mmu); - - if (ret != 0) { - prom_printf("hypervisor_tlb_lock[%lx:%lx:%lx:%lx]: " - "errors with %lx\n", vaddr, 0, pte, mmu, ret); - prom_halt(); - } -} - -static unsigned long kern_large_tte(unsigned long paddr); - -static void __init remap_kernel(void) -{ - unsigned long phys_page, tte_vaddr, tte_data; - int i, tlb_ent = sparc64_highest_locked_tlbent(); - - tte_vaddr = (unsigned long) KERNBASE; - phys_page = (prom_boot_mapping_phys_low >> 22UL) << 22UL; - tte_data = kern_large_tte(phys_page); - - kern_locked_tte_data = tte_data; - - /* Now lock us into the TLBs via Hypervisor or OBP. */ - if (tlb_type == hypervisor) { - for (i = 0; i < num_kernel_image_mappings; i++) { - hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_DMMU); - hypervisor_tlb_lock(tte_vaddr, tte_data, HV_MMU_IMMU); - tte_vaddr += 0x400000; - tte_data += 0x400000; - } - } else { - for (i = 0; i < num_kernel_image_mappings; i++) { - prom_dtlb_load(tlb_ent - i, tte_data, tte_vaddr); - prom_itlb_load(tlb_ent - i, tte_data, tte_vaddr); - tte_vaddr += 0x400000; - tte_data += 0x400000; - } - sparc64_highest_unlocked_tlb_ent = tlb_ent - i; - } - if (tlb_type == cheetah_plus) { - sparc64_kern_pri_context = (CTX_CHEETAH_PLUS_CTX0 | - CTX_CHEETAH_PLUS_NUC); - sparc64_kern_pri_nuc_bits = CTX_CHEETAH_PLUS_NUC; - sparc64_kern_sec_context = CTX_CHEETAH_PLUS_CTX0; - } -} - - -static void __init inherit_prom_mappings(void) -{ - /* Now fixup OBP's idea about where we really are mapped. */ - printk("Remapping the kernel... "); - remap_kernel(); - printk("done.\n"); -} - -void prom_world(int enter) -{ - if (!enter) - set_fs((mm_segment_t) { get_thread_current_ds() }); - - __asm__ __volatile__("flushw"); -} - -void __flush_dcache_range(unsigned long start, unsigned long end) -{ - unsigned long va; - - if (tlb_type == spitfire) { - int n = 0; - - for (va = start; va < end; va += 32) { - spitfire_put_dcache_tag(va & 0x3fe0, 0x0); - if (++n >= 512) - break; - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - start = __pa(start); - end = __pa(end); - for (va = start; va < end; va += 32) - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (va), - "i" (ASI_DCACHE_INVALIDATE)); - } -} - -/* get_new_mmu_context() uses "cache + 1". */ -DEFINE_SPINLOCK(ctx_alloc_lock); -unsigned long tlb_context_cache = CTX_FIRST_VERSION - 1; -#define MAX_CTX_NR (1UL << CTX_NR_BITS) -#define CTX_BMAP_SLOTS BITS_TO_LONGS(MAX_CTX_NR) -DECLARE_BITMAP(mmu_context_bmap, MAX_CTX_NR); - -/* Caller does TLB context flushing on local CPU if necessary. - * The caller also ensures that CTX_VALID(mm->context) is false. - * - * We must be careful about boundary cases so that we never - * let the user have CTX 0 (nucleus) or we ever use a CTX - * version of zero (and thus NO_CONTEXT would not be caught - * by version mis-match tests in mmu_context.h). - * - * Always invoked with interrupts disabled. - */ -void get_new_mmu_context(struct mm_struct *mm) -{ - unsigned long ctx, new_ctx; - unsigned long orig_pgsz_bits; - unsigned long flags; - int new_version; - - spin_lock_irqsave(&ctx_alloc_lock, flags); - orig_pgsz_bits = (mm->context.sparc64_ctx_val & CTX_PGSZ_MASK); - ctx = (tlb_context_cache + 1) & CTX_NR_MASK; - new_ctx = find_next_zero_bit(mmu_context_bmap, 1 << CTX_NR_BITS, ctx); - new_version = 0; - if (new_ctx >= (1 << CTX_NR_BITS)) { - new_ctx = find_next_zero_bit(mmu_context_bmap, ctx, 1); - if (new_ctx >= ctx) { - int i; - new_ctx = (tlb_context_cache & CTX_VERSION_MASK) + - CTX_FIRST_VERSION; - if (new_ctx == 1) - new_ctx = CTX_FIRST_VERSION; - - /* Don't call memset, for 16 entries that's just - * plain silly... - */ - mmu_context_bmap[0] = 3; - mmu_context_bmap[1] = 0; - mmu_context_bmap[2] = 0; - mmu_context_bmap[3] = 0; - for (i = 4; i < CTX_BMAP_SLOTS; i += 4) { - mmu_context_bmap[i + 0] = 0; - mmu_context_bmap[i + 1] = 0; - mmu_context_bmap[i + 2] = 0; - mmu_context_bmap[i + 3] = 0; - } - new_version = 1; - goto out; - } - } - mmu_context_bmap[new_ctx>>6] |= (1UL << (new_ctx & 63)); - new_ctx |= (tlb_context_cache & CTX_VERSION_MASK); -out: - tlb_context_cache = new_ctx; - mm->context.sparc64_ctx_val = new_ctx | orig_pgsz_bits; - spin_unlock_irqrestore(&ctx_alloc_lock, flags); - - if (unlikely(new_version)) - smp_new_mmu_context_version(); -} - -static int numa_enabled = 1; -static int numa_debug; - -static int __init early_numa(char *p) -{ - if (!p) - return 0; - - if (strstr(p, "off")) - numa_enabled = 0; - - if (strstr(p, "debug")) - numa_debug = 1; - - return 0; -} -early_param("numa", early_numa); - -#define numadbg(f, a...) \ -do { if (numa_debug) \ - printk(KERN_INFO f, ## a); \ -} while (0) - -static void __init find_ramdisk(unsigned long phys_base) -{ -#ifdef CONFIG_BLK_DEV_INITRD - if (sparc_ramdisk_image || sparc_ramdisk_image64) { - unsigned long ramdisk_image; - - /* Older versions of the bootloader only supported a - * 32-bit physical address for the ramdisk image - * location, stored at sparc_ramdisk_image. Newer - * SILO versions set sparc_ramdisk_image to zero and - * provide a full 64-bit physical address at - * sparc_ramdisk_image64. - */ - ramdisk_image = sparc_ramdisk_image; - if (!ramdisk_image) - ramdisk_image = sparc_ramdisk_image64; - - /* Another bootloader quirk. The bootloader normalizes - * the physical address to KERNBASE, so we have to - * factor that back out and add in the lowest valid - * physical page address to get the true physical address. - */ - ramdisk_image -= KERNBASE; - ramdisk_image += phys_base; - - numadbg("Found ramdisk at physical address 0x%lx, size %u\n", - ramdisk_image, sparc_ramdisk_size); - - initrd_start = ramdisk_image; - initrd_end = ramdisk_image + sparc_ramdisk_size; - - lmb_reserve(initrd_start, sparc_ramdisk_size); - - initrd_start += PAGE_OFFSET; - initrd_end += PAGE_OFFSET; - } -#endif -} - -struct node_mem_mask { - unsigned long mask; - unsigned long val; - unsigned long bootmem_paddr; -}; -static struct node_mem_mask node_masks[MAX_NUMNODES]; -static int num_node_masks; - -int numa_cpu_lookup_table[NR_CPUS]; -cpumask_t numa_cpumask_lookup_table[MAX_NUMNODES]; - -#ifdef CONFIG_NEED_MULTIPLE_NODES - -struct mdesc_mblock { - u64 base; - u64 size; - u64 offset; /* RA-to-PA */ -}; -static struct mdesc_mblock *mblocks; -static int num_mblocks; - -static unsigned long ra_to_pa(unsigned long addr) -{ - int i; - - for (i = 0; i < num_mblocks; i++) { - struct mdesc_mblock *m = &mblocks[i]; - - if (addr >= m->base && - addr < (m->base + m->size)) { - addr += m->offset; - break; - } - } - return addr; -} - -static int find_node(unsigned long addr) -{ - int i; - - addr = ra_to_pa(addr); - for (i = 0; i < num_node_masks; i++) { - struct node_mem_mask *p = &node_masks[i]; - - if ((addr & p->mask) == p->val) - return i; - } - return -1; -} - -static unsigned long nid_range(unsigned long start, unsigned long end, - int *nid) -{ - *nid = find_node(start); - start += PAGE_SIZE; - while (start < end) { - int n = find_node(start); - - if (n != *nid) - break; - start += PAGE_SIZE; - } - - if (start > end) - start = end; - - return start; -} -#else -static unsigned long nid_range(unsigned long start, unsigned long end, - int *nid) -{ - *nid = 0; - return end; -} -#endif - -/* This must be invoked after performing all of the necessary - * add_active_range() calls for 'nid'. We need to be able to get - * correct data from get_pfn_range_for_nid(). - */ -static void __init allocate_node_data(int nid) -{ - unsigned long paddr, num_pages, start_pfn, end_pfn; - struct pglist_data *p; - -#ifdef CONFIG_NEED_MULTIPLE_NODES - paddr = lmb_alloc_nid(sizeof(struct pglist_data), - SMP_CACHE_BYTES, nid, nid_range); - if (!paddr) { - prom_printf("Cannot allocate pglist_data for nid[%d]\n", nid); - prom_halt(); - } - NODE_DATA(nid) = __va(paddr); - memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); - - NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; -#endif - - p = NODE_DATA(nid); - - get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); - p->node_start_pfn = start_pfn; - p->node_spanned_pages = end_pfn - start_pfn; - - if (p->node_spanned_pages) { - num_pages = bootmem_bootmap_pages(p->node_spanned_pages); - - paddr = lmb_alloc_nid(num_pages << PAGE_SHIFT, PAGE_SIZE, nid, - nid_range); - if (!paddr) { - prom_printf("Cannot allocate bootmap for nid[%d]\n", - nid); - prom_halt(); - } - node_masks[nid].bootmem_paddr = paddr; - } -} - -static void init_node_masks_nonnuma(void) -{ - int i; - - numadbg("Initializing tables for non-numa.\n"); - - node_masks[0].mask = node_masks[0].val = 0; - num_node_masks = 1; - - for (i = 0; i < NR_CPUS; i++) - numa_cpu_lookup_table[i] = 0; - - numa_cpumask_lookup_table[0] = CPU_MASK_ALL; -} - -#ifdef CONFIG_NEED_MULTIPLE_NODES -struct pglist_data *node_data[MAX_NUMNODES]; - -EXPORT_SYMBOL(numa_cpu_lookup_table); -EXPORT_SYMBOL(numa_cpumask_lookup_table); -EXPORT_SYMBOL(node_data); - -struct mdesc_mlgroup { - u64 node; - u64 latency; - u64 match; - u64 mask; -}; -static struct mdesc_mlgroup *mlgroups; -static int num_mlgroups; - -static int scan_pio_for_cfg_handle(struct mdesc_handle *md, u64 pio, - u32 cfg_handle) -{ - u64 arc; - - mdesc_for_each_arc(arc, md, pio, MDESC_ARC_TYPE_FWD) { - u64 target = mdesc_arc_target(md, arc); - const u64 *val; - - val = mdesc_get_property(md, target, - "cfg-handle", NULL); - if (val && *val == cfg_handle) - return 0; - } - return -ENODEV; -} - -static int scan_arcs_for_cfg_handle(struct mdesc_handle *md, u64 grp, - u32 cfg_handle) -{ - u64 arc, candidate, best_latency = ~(u64)0; - - candidate = MDESC_NODE_NULL; - mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) { - u64 target = mdesc_arc_target(md, arc); - const char *name = mdesc_node_name(md, target); - const u64 *val; - - if (strcmp(name, "pio-latency-group")) - continue; - - val = mdesc_get_property(md, target, "latency", NULL); - if (!val) - continue; - - if (*val < best_latency) { - candidate = target; - best_latency = *val; - } - } - - if (candidate == MDESC_NODE_NULL) - return -ENODEV; - - return scan_pio_for_cfg_handle(md, candidate, cfg_handle); -} - -int of_node_to_nid(struct device_node *dp) -{ - const struct linux_prom64_registers *regs; - struct mdesc_handle *md; - u32 cfg_handle; - int count, nid; - u64 grp; - - /* This is the right thing to do on currently supported - * SUN4U NUMA platforms as well, as the PCI controller does - * not sit behind any particular memory controller. - */ - if (!mlgroups) - return -1; - - regs = of_get_property(dp, "reg", NULL); - if (!regs) - return -1; - - cfg_handle = (regs->phys_addr >> 32UL) & 0x0fffffff; - - md = mdesc_grab(); - - count = 0; - nid = -1; - mdesc_for_each_node_by_name(md, grp, "group") { - if (!scan_arcs_for_cfg_handle(md, grp, cfg_handle)) { - nid = count; - break; - } - count++; - } - - mdesc_release(md); - - return nid; -} - -static void __init add_node_ranges(void) -{ - int i; - - for (i = 0; i < lmb.memory.cnt; i++) { - unsigned long size = lmb_size_bytes(&lmb.memory, i); - unsigned long start, end; - - start = lmb.memory.region[i].base; - end = start + size; - while (start < end) { - unsigned long this_end; - int nid; - - this_end = nid_range(start, end, &nid); - - numadbg("Adding active range nid[%d] " - "start[%lx] end[%lx]\n", - nid, start, this_end); - - add_active_range(nid, - start >> PAGE_SHIFT, - this_end >> PAGE_SHIFT); - - start = this_end; - } - } -} - -static int __init grab_mlgroups(struct mdesc_handle *md) -{ - unsigned long paddr; - int count = 0; - u64 node; - - mdesc_for_each_node_by_name(md, node, "memory-latency-group") - count++; - if (!count) - return -ENOENT; - - paddr = lmb_alloc(count * sizeof(struct mdesc_mlgroup), - SMP_CACHE_BYTES); - if (!paddr) - return -ENOMEM; - - mlgroups = __va(paddr); - num_mlgroups = count; - - count = 0; - mdesc_for_each_node_by_name(md, node, "memory-latency-group") { - struct mdesc_mlgroup *m = &mlgroups[count++]; - const u64 *val; - - m->node = node; - - val = mdesc_get_property(md, node, "latency", NULL); - m->latency = *val; - val = mdesc_get_property(md, node, "address-match", NULL); - m->match = *val; - val = mdesc_get_property(md, node, "address-mask", NULL); - m->mask = *val; - - numadbg("MLGROUP[%d]: node[%lx] latency[%lx] " - "match[%lx] mask[%lx]\n", - count - 1, m->node, m->latency, m->match, m->mask); - } - - return 0; -} - -static int __init grab_mblocks(struct mdesc_handle *md) -{ - unsigned long paddr; - int count = 0; - u64 node; - - mdesc_for_each_node_by_name(md, node, "mblock") - count++; - if (!count) - return -ENOENT; - - paddr = lmb_alloc(count * sizeof(struct mdesc_mblock), - SMP_CACHE_BYTES); - if (!paddr) - return -ENOMEM; - - mblocks = __va(paddr); - num_mblocks = count; - - count = 0; - mdesc_for_each_node_by_name(md, node, "mblock") { - struct mdesc_mblock *m = &mblocks[count++]; - const u64 *val; - - val = mdesc_get_property(md, node, "base", NULL); - m->base = *val; - val = mdesc_get_property(md, node, "size", NULL); - m->size = *val; - val = mdesc_get_property(md, node, - "address-congruence-offset", NULL); - m->offset = *val; - - numadbg("MBLOCK[%d]: base[%lx] size[%lx] offset[%lx]\n", - count - 1, m->base, m->size, m->offset); - } - - return 0; -} - -static void __init numa_parse_mdesc_group_cpus(struct mdesc_handle *md, - u64 grp, cpumask_t *mask) -{ - u64 arc; - - cpus_clear(*mask); - - mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_BACK) { - u64 target = mdesc_arc_target(md, arc); - const char *name = mdesc_node_name(md, target); - const u64 *id; - - if (strcmp(name, "cpu")) - continue; - id = mdesc_get_property(md, target, "id", NULL); - if (*id < NR_CPUS) - cpu_set(*id, *mask); - } -} - -static struct mdesc_mlgroup * __init find_mlgroup(u64 node) -{ - int i; - - for (i = 0; i < num_mlgroups; i++) { - struct mdesc_mlgroup *m = &mlgroups[i]; - if (m->node == node) - return m; - } - return NULL; -} - -static int __init numa_attach_mlgroup(struct mdesc_handle *md, u64 grp, - int index) -{ - struct mdesc_mlgroup *candidate = NULL; - u64 arc, best_latency = ~(u64)0; - struct node_mem_mask *n; - - mdesc_for_each_arc(arc, md, grp, MDESC_ARC_TYPE_FWD) { - u64 target = mdesc_arc_target(md, arc); - struct mdesc_mlgroup *m = find_mlgroup(target); - if (!m) - continue; - if (m->latency < best_latency) { - candidate = m; - best_latency = m->latency; - } - } - if (!candidate) - return -ENOENT; - - if (num_node_masks != index) { - printk(KERN_ERR "Inconsistent NUMA state, " - "index[%d] != num_node_masks[%d]\n", - index, num_node_masks); - return -EINVAL; - } - - n = &node_masks[num_node_masks++]; - - n->mask = candidate->mask; - n->val = candidate->match; - - numadbg("NUMA NODE[%d]: mask[%lx] val[%lx] (latency[%lx])\n", - index, n->mask, n->val, candidate->latency); - - return 0; -} - -static int __init numa_parse_mdesc_group(struct mdesc_handle *md, u64 grp, - int index) -{ - cpumask_t mask; - int cpu; - - numa_parse_mdesc_group_cpus(md, grp, &mask); - - for_each_cpu_mask(cpu, mask) - numa_cpu_lookup_table[cpu] = index; - numa_cpumask_lookup_table[index] = mask; - - if (numa_debug) { - printk(KERN_INFO "NUMA GROUP[%d]: cpus [ ", index); - for_each_cpu_mask(cpu, mask) - printk("%d ", cpu); - printk("]\n"); - } - - return numa_attach_mlgroup(md, grp, index); -} - -static int __init numa_parse_mdesc(void) -{ - struct mdesc_handle *md = mdesc_grab(); - int i, err, count; - u64 node; - - node = mdesc_node_by_name(md, MDESC_NODE_NULL, "latency-groups"); - if (node == MDESC_NODE_NULL) { - mdesc_release(md); - return -ENOENT; - } - - err = grab_mblocks(md); - if (err < 0) - goto out; - - err = grab_mlgroups(md); - if (err < 0) - goto out; - - count = 0; - mdesc_for_each_node_by_name(md, node, "group") { - err = numa_parse_mdesc_group(md, node, count); - if (err < 0) - break; - count++; - } - - add_node_ranges(); - - for (i = 0; i < num_node_masks; i++) { - allocate_node_data(i); - node_set_online(i); - } - - err = 0; -out: - mdesc_release(md); - return err; -} - -static int __init numa_parse_jbus(void) -{ - unsigned long cpu, index; - - /* NUMA node id is encoded in bits 36 and higher, and there is - * a 1-to-1 mapping from CPU ID to NUMA node ID. - */ - index = 0; - for_each_present_cpu(cpu) { - numa_cpu_lookup_table[cpu] = index; - numa_cpumask_lookup_table[index] = cpumask_of_cpu(cpu); - node_masks[index].mask = ~((1UL << 36UL) - 1UL); - node_masks[index].val = cpu << 36UL; - - index++; - } - num_node_masks = index; - - add_node_ranges(); - - for (index = 0; index < num_node_masks; index++) { - allocate_node_data(index); - node_set_online(index); - } - - return 0; -} - -static int __init numa_parse_sun4u(void) -{ - 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) - return numa_parse_jbus(); - } - return -1; -} - -static int __init bootmem_init_numa(void) -{ - int err = -1; - - numadbg("bootmem_init_numa()\n"); - - if (numa_enabled) { - if (tlb_type == hypervisor) - err = numa_parse_mdesc(); - else - err = numa_parse_sun4u(); - } - return err; -} - -#else - -static int bootmem_init_numa(void) -{ - return -1; -} - -#endif - -static void __init bootmem_init_nonnuma(void) -{ - unsigned long top_of_ram = lmb_end_of_DRAM(); - unsigned long total_ram = lmb_phys_mem_size(); - unsigned int i; - - numadbg("bootmem_init_nonnuma()\n"); - - printk(KERN_INFO "Top of RAM: 0x%lx, Total RAM: 0x%lx\n", - top_of_ram, total_ram); - printk(KERN_INFO "Memory hole size: %ldMB\n", - (top_of_ram - total_ram) >> 20); - - init_node_masks_nonnuma(); - - for (i = 0; i < lmb.memory.cnt; i++) { - unsigned long size = lmb_size_bytes(&lmb.memory, i); - unsigned long start_pfn, end_pfn; - - if (!size) - continue; - - start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT; - end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i); - add_active_range(0, start_pfn, end_pfn); - } - - allocate_node_data(0); - - node_set_online(0); -} - -static void __init reserve_range_in_node(int nid, unsigned long start, - unsigned long end) -{ - numadbg(" reserve_range_in_node(nid[%d],start[%lx],end[%lx]\n", - nid, start, end); - while (start < end) { - unsigned long this_end; - int n; - - this_end = nid_range(start, end, &n); - if (n == nid) { - numadbg(" MATCH reserving range [%lx:%lx]\n", - start, this_end); - reserve_bootmem_node(NODE_DATA(nid), start, - (this_end - start), BOOTMEM_DEFAULT); - } else - numadbg(" NO MATCH, advancing start to %lx\n", - this_end); - - start = this_end; - } -} - -static void __init trim_reserved_in_node(int nid) -{ - int i; - - numadbg(" trim_reserved_in_node(%d)\n", nid); - - for (i = 0; i < lmb.reserved.cnt; i++) { - unsigned long start = lmb.reserved.region[i].base; - unsigned long size = lmb_size_bytes(&lmb.reserved, i); - unsigned long end = start + size; - - reserve_range_in_node(nid, start, end); - } -} - -static void __init bootmem_init_one_node(int nid) -{ - struct pglist_data *p; - - numadbg("bootmem_init_one_node(%d)\n", nid); - - p = NODE_DATA(nid); - - if (p->node_spanned_pages) { - unsigned long paddr = node_masks[nid].bootmem_paddr; - unsigned long end_pfn; - - end_pfn = p->node_start_pfn + p->node_spanned_pages; - - numadbg(" init_bootmem_node(%d, %lx, %lx, %lx)\n", - nid, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn); - - init_bootmem_node(p, paddr >> PAGE_SHIFT, - p->node_start_pfn, end_pfn); - - numadbg(" free_bootmem_with_active_regions(%d, %lx)\n", - nid, end_pfn); - free_bootmem_with_active_regions(nid, end_pfn); - - trim_reserved_in_node(nid); - - numadbg(" sparse_memory_present_with_active_regions(%d)\n", - nid); - sparse_memory_present_with_active_regions(nid); - } -} - -static unsigned long __init bootmem_init(unsigned long phys_base) -{ - unsigned long end_pfn; - int nid; - - end_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT; - max_pfn = max_low_pfn = end_pfn; - min_low_pfn = (phys_base >> PAGE_SHIFT); - - if (bootmem_init_numa() < 0) - bootmem_init_nonnuma(); - - /* XXX cpu notifier XXX */ - - for_each_online_node(nid) - bootmem_init_one_node(nid); - - sparse_init(); - - return end_pfn; -} - -static struct linux_prom64_registers pall[MAX_BANKS] __initdata; -static int pall_ents __initdata; - -#ifdef CONFIG_DEBUG_PAGEALLOC -static unsigned long __ref kernel_map_range(unsigned long pstart, - unsigned long pend, pgprot_t prot) -{ - unsigned long vstart = PAGE_OFFSET + pstart; - unsigned long vend = PAGE_OFFSET + pend; - unsigned long alloc_bytes = 0UL; - - if ((vstart & ~PAGE_MASK) || (vend & ~PAGE_MASK)) { - prom_printf("kernel_map: Unaligned physmem[%lx:%lx]\n", - vstart, vend); - prom_halt(); - } - - while (vstart < vend) { - unsigned long this_end, paddr = __pa(vstart); - pgd_t *pgd = pgd_offset_k(vstart); - pud_t *pud; - pmd_t *pmd; - pte_t *pte; - - pud = pud_offset(pgd, vstart); - if (pud_none(*pud)) { - pmd_t *new; - - new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); - alloc_bytes += PAGE_SIZE; - pud_populate(&init_mm, pud, new); - } - - pmd = pmd_offset(pud, vstart); - if (!pmd_present(*pmd)) { - pte_t *new; - - new = __alloc_bootmem(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); - alloc_bytes += PAGE_SIZE; - pmd_populate_kernel(&init_mm, pmd, new); - } - - pte = pte_offset_kernel(pmd, vstart); - this_end = (vstart + PMD_SIZE) & PMD_MASK; - if (this_end > vend) - this_end = vend; - - while (vstart < this_end) { - pte_val(*pte) = (paddr | pgprot_val(prot)); - - vstart += PAGE_SIZE; - paddr += PAGE_SIZE; - pte++; - } - } - - return alloc_bytes; -} - -extern unsigned int kvmap_linear_patch[1]; -#endif /* CONFIG_DEBUG_PAGEALLOC */ - -static void __init mark_kpte_bitmap(unsigned long start, unsigned long end) -{ - const unsigned long shift_256MB = 28; - const unsigned long mask_256MB = ((1UL << shift_256MB) - 1UL); - const unsigned long size_256MB = (1UL << shift_256MB); - - while (start < end) { - long remains; - - remains = end - start; - if (remains < size_256MB) - break; - - if (start & mask_256MB) { - start = (start + size_256MB) & ~mask_256MB; - continue; - } - - while (remains >= size_256MB) { - unsigned long index = start >> shift_256MB; - - __set_bit(index, kpte_linear_bitmap); - - start += size_256MB; - remains -= size_256MB; - } - } -} - -static void __init init_kpte_bitmap(void) -{ - unsigned long i; - - for (i = 0; i < pall_ents; i++) { - unsigned long phys_start, phys_end; - - phys_start = pall[i].phys_addr; - phys_end = phys_start + pall[i].reg_size; - - mark_kpte_bitmap(phys_start, phys_end); - } -} - -static void __init kernel_physical_mapping_init(void) -{ -#ifdef CONFIG_DEBUG_PAGEALLOC - unsigned long i, mem_alloced = 0UL; - - for (i = 0; i < pall_ents; i++) { - unsigned long phys_start, phys_end; - - phys_start = pall[i].phys_addr; - phys_end = phys_start + pall[i].reg_size; - - mem_alloced += kernel_map_range(phys_start, phys_end, - PAGE_KERNEL); - } - - printk("Allocated %ld bytes for kernel page tables.\n", - mem_alloced); - - kvmap_linear_patch[0] = 0x01000000; /* nop */ - flushi(&kvmap_linear_patch[0]); - - __flush_tlb_all(); -#endif -} - -#ifdef CONFIG_DEBUG_PAGEALLOC -void kernel_map_pages(struct page *page, int numpages, int enable) -{ - unsigned long phys_start = page_to_pfn(page) << PAGE_SHIFT; - unsigned long phys_end = phys_start + (numpages * PAGE_SIZE); - - kernel_map_range(phys_start, phys_end, - (enable ? PAGE_KERNEL : __pgprot(0))); - - flush_tsb_kernel_range(PAGE_OFFSET + phys_start, - PAGE_OFFSET + phys_end); - - /* we should perform an IPI and flush all tlbs, - * but that can deadlock->flush only current cpu. - */ - __flush_tlb_kernel_range(PAGE_OFFSET + phys_start, - PAGE_OFFSET + phys_end); -} -#endif - -unsigned long __init find_ecache_flush_span(unsigned long size) -{ - int i; - - for (i = 0; i < pavail_ents; i++) { - if (pavail[i].reg_size >= size) - return pavail[i].phys_addr; - } - - return ~0UL; -} - -static void __init tsb_phys_patch(void) -{ - struct tsb_ldquad_phys_patch_entry *pquad; - struct tsb_phys_patch_entry *p; - - pquad = &__tsb_ldquad_phys_patch; - while (pquad < &__tsb_ldquad_phys_patch_end) { - unsigned long addr = pquad->addr; - - if (tlb_type == hypervisor) - *(unsigned int *) addr = pquad->sun4v_insn; - else - *(unsigned int *) addr = pquad->sun4u_insn; - wmb(); - __asm__ __volatile__("flush %0" - : /* no outputs */ - : "r" (addr)); - - pquad++; - } - - p = &__tsb_phys_patch; - while (p < &__tsb_phys_patch_end) { - unsigned long addr = p->addr; - - *(unsigned int *) addr = p->insn; - wmb(); - __asm__ __volatile__("flush %0" - : /* no outputs */ - : "r" (addr)); - - p++; - } -} - -/* Don't mark as init, we give this to the Hypervisor. */ -#ifndef CONFIG_DEBUG_PAGEALLOC -#define NUM_KTSB_DESCR 2 -#else -#define NUM_KTSB_DESCR 1 -#endif -static struct hv_tsb_descr ktsb_descr[NUM_KTSB_DESCR]; -extern struct tsb swapper_tsb[KERNEL_TSB_NENTRIES]; - -static void __init sun4v_ktsb_init(void) -{ - unsigned long ktsb_pa; - - /* First KTSB for PAGE_SIZE mappings. */ - ktsb_pa = kern_base + ((unsigned long)&swapper_tsb[0] - KERNBASE); - - switch (PAGE_SIZE) { - case 8 * 1024: - default: - ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_8K; - ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_8K; - break; - - case 64 * 1024: - ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_64K; - ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_64K; - break; - - case 512 * 1024: - ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_512K; - ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_512K; - break; - - case 4 * 1024 * 1024: - ktsb_descr[0].pgsz_idx = HV_PGSZ_IDX_4MB; - ktsb_descr[0].pgsz_mask = HV_PGSZ_MASK_4MB; - break; - }; - - ktsb_descr[0].assoc = 1; - ktsb_descr[0].num_ttes = KERNEL_TSB_NENTRIES; - ktsb_descr[0].ctx_idx = 0; - ktsb_descr[0].tsb_base = ktsb_pa; - ktsb_descr[0].resv = 0; - -#ifndef CONFIG_DEBUG_PAGEALLOC - /* Second KTSB for 4MB/256MB mappings. */ - ktsb_pa = (kern_base + - ((unsigned long)&swapper_4m_tsb[0] - KERNBASE)); - - ktsb_descr[1].pgsz_idx = HV_PGSZ_IDX_4MB; - ktsb_descr[1].pgsz_mask = (HV_PGSZ_MASK_4MB | - HV_PGSZ_MASK_256MB); - ktsb_descr[1].assoc = 1; - ktsb_descr[1].num_ttes = KERNEL_TSB4M_NENTRIES; - ktsb_descr[1].ctx_idx = 0; - ktsb_descr[1].tsb_base = ktsb_pa; - ktsb_descr[1].resv = 0; -#endif -} - -void __cpuinit sun4v_ktsb_register(void) -{ - unsigned long pa, ret; - - pa = kern_base + ((unsigned long)&ktsb_descr[0] - KERNBASE); - - ret = sun4v_mmu_tsb_ctx0(NUM_KTSB_DESCR, pa); - if (ret != 0) { - prom_printf("hypervisor_mmu_tsb_ctx0[%lx]: " - "errors with %lx\n", pa, ret); - prom_halt(); - } -} - -/* paging_init() sets up the page tables */ - -static unsigned long last_valid_pfn; -pgd_t swapper_pg_dir[2048]; - -static void sun4u_pgprot_init(void); -static void sun4v_pgprot_init(void); - -/* Dummy function */ -void __init setup_per_cpu_areas(void) -{ -} - -void __init paging_init(void) -{ - unsigned long end_pfn, shift, phys_base; - unsigned long real_end, i; - - /* These build time checkes make sure that the dcache_dirty_cpu() - * page->flags usage will work. - * - * When a page gets marked as dcache-dirty, we store the - * cpu number starting at bit 32 in the page->flags. Also, - * functions like clear_dcache_dirty_cpu use the cpu mask - * in 13-bit signed-immediate instruction fields. - */ - - /* - * Page flags must not reach into upper 32 bits that are used - * for the cpu number - */ - BUILD_BUG_ON(NR_PAGEFLAGS > 32); - - /* - * The bit fields placed in the high range must not reach below - * the 32 bit boundary. Otherwise we cannot place the cpu field - * at the 32 bit boundary. - */ - BUILD_BUG_ON(SECTIONS_WIDTH + NODES_WIDTH + ZONES_WIDTH + - ilog2(roundup_pow_of_two(NR_CPUS)) > 32); - - BUILD_BUG_ON(NR_CPUS > 4096); - - kern_base = (prom_boot_mapping_phys_low >> 22UL) << 22UL; - kern_size = (unsigned long)&_end - (unsigned long)KERNBASE; - - /* Invalidate both kernel TSBs. */ - memset(swapper_tsb, 0x40, sizeof(swapper_tsb)); -#ifndef CONFIG_DEBUG_PAGEALLOC - memset(swapper_4m_tsb, 0x40, sizeof(swapper_4m_tsb)); -#endif - - if (tlb_type == hypervisor) - sun4v_pgprot_init(); - else - sun4u_pgprot_init(); - - if (tlb_type == cheetah_plus || - tlb_type == hypervisor) - tsb_phys_patch(); - - if (tlb_type == hypervisor) { - sun4v_patch_tlb_handlers(); - sun4v_ktsb_init(); - } - - lmb_init(); - - /* Find available physical memory... - * - * Read it twice in order to work around a bug in openfirmware. - * The call to grab this table itself can cause openfirmware to - * allocate memory, which in turn can take away some space from - * the list of available memory. Reading it twice makes sure - * we really do get the final value. - */ - read_obp_translations(); - read_obp_memory("reg", &pall[0], &pall_ents); - read_obp_memory("available", &pavail[0], &pavail_ents); - read_obp_memory("available", &pavail[0], &pavail_ents); - - phys_base = 0xffffffffffffffffUL; - for (i = 0; i < pavail_ents; i++) { - phys_base = min(phys_base, pavail[i].phys_addr); - lmb_add(pavail[i].phys_addr, pavail[i].reg_size); - } - - lmb_reserve(kern_base, kern_size); - - find_ramdisk(phys_base); - - lmb_enforce_memory_limit(cmdline_memory_size); - - lmb_analyze(); - lmb_dump_all(); - - set_bit(0, mmu_context_bmap); - - shift = kern_base + PAGE_OFFSET - ((unsigned long)KERNBASE); - - real_end = (unsigned long)_end; - num_kernel_image_mappings = DIV_ROUND_UP(real_end - KERNBASE, 1 << 22); - printk("Kernel: Using %d locked TLB entries for main kernel image.\n", - num_kernel_image_mappings); - - /* Set kernel pgd to upper alias so physical page computations - * work. - */ - init_mm.pgd += ((shift) / (sizeof(pgd_t))); - - memset(swapper_low_pmd_dir, 0, sizeof(swapper_low_pmd_dir)); - - /* Now can init the kernel/bad page tables. */ - pud_set(pud_offset(&swapper_pg_dir[0], 0), - swapper_low_pmd_dir + (shift / sizeof(pgd_t))); - - inherit_prom_mappings(); - - init_kpte_bitmap(); - - /* Ok, we can use our TLB miss and window trap handlers safely. */ - setup_tba(); - - __flush_tlb_all(); - - if (tlb_type == hypervisor) - sun4v_ktsb_register(); - - /* We must setup the per-cpu areas before we pull in the - * PROM and the MDESC. The code there fills in cpu and - * other information into per-cpu data structures. - */ - real_setup_per_cpu_areas(); - - prom_build_devicetree(); - - if (tlb_type == hypervisor) - sun4v_mdesc_init(); - - /* Once the OF device tree and MDESC have been setup, we know - * the list of possible cpus. Therefore we can allocate the - * IRQ stacks. - */ - for_each_possible_cpu(i) { - /* XXX Use node local allocations... XXX */ - softirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE)); - hardirq_stack[i] = __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE)); - } - - /* Setup bootmem... */ - last_valid_pfn = end_pfn = bootmem_init(phys_base); - -#ifndef CONFIG_NEED_MULTIPLE_NODES - max_mapnr = last_valid_pfn; -#endif - kernel_physical_mapping_init(); - - { - unsigned long max_zone_pfns[MAX_NR_ZONES]; - - memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); - - max_zone_pfns[ZONE_NORMAL] = end_pfn; - - free_area_init_nodes(max_zone_pfns); - } - - printk("Booting Linux...\n"); -} - -int __init page_in_phys_avail(unsigned long paddr) -{ - int i; - - paddr &= PAGE_MASK; - - for (i = 0; i < pavail_ents; i++) { - unsigned long start, end; - - start = pavail[i].phys_addr; - end = start + pavail[i].reg_size; - - if (paddr >= start && paddr < end) - return 1; - } - if (paddr >= kern_base && paddr < (kern_base + kern_size)) - return 1; -#ifdef CONFIG_BLK_DEV_INITRD - if (paddr >= __pa(initrd_start) && - paddr < __pa(PAGE_ALIGN(initrd_end))) - return 1; -#endif - - return 0; -} - -static struct linux_prom64_registers pavail_rescan[MAX_BANKS] __initdata; -static int pavail_rescan_ents __initdata; - -/* Certain OBP calls, such as fetching "available" properties, can - * claim physical memory. So, along with initializing the valid - * address bitmap, what we do here is refetch the physical available - * memory list again, and make sure it provides at least as much - * memory as 'pavail' does. - */ -static void __init setup_valid_addr_bitmap_from_pavail(void) -{ - int i; - - read_obp_memory("available", &pavail_rescan[0], &pavail_rescan_ents); - - for (i = 0; i < pavail_ents; i++) { - unsigned long old_start, old_end; - - old_start = pavail[i].phys_addr; - old_end = old_start + pavail[i].reg_size; - while (old_start < old_end) { - int n; - - for (n = 0; n < pavail_rescan_ents; n++) { - unsigned long new_start, new_end; - - new_start = pavail_rescan[n].phys_addr; - new_end = new_start + - pavail_rescan[n].reg_size; - - if (new_start <= old_start && - new_end >= (old_start + PAGE_SIZE)) { - set_bit(old_start >> 22, - sparc64_valid_addr_bitmap); - goto do_next_page; - } - } - - prom_printf("mem_init: Lost memory in pavail\n"); - prom_printf("mem_init: OLD start[%lx] size[%lx]\n", - pavail[i].phys_addr, - pavail[i].reg_size); - prom_printf("mem_init: NEW start[%lx] size[%lx]\n", - pavail_rescan[i].phys_addr, - pavail_rescan[i].reg_size); - prom_printf("mem_init: Cannot continue, aborting.\n"); - prom_halt(); - - do_next_page: - old_start += PAGE_SIZE; - } - } -} - -void __init mem_init(void) -{ - unsigned long codepages, datapages, initpages; - unsigned long addr, last; - int i; - - i = last_valid_pfn >> ((22 - PAGE_SHIFT) + 6); - i += 1; - sparc64_valid_addr_bitmap = (unsigned long *) alloc_bootmem(i << 3); - if (sparc64_valid_addr_bitmap == NULL) { - prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n"); - prom_halt(); - } - memset(sparc64_valid_addr_bitmap, 0, i << 3); - - addr = PAGE_OFFSET + kern_base; - last = PAGE_ALIGN(kern_size) + addr; - while (addr < last) { - set_bit(__pa(addr) >> 22, sparc64_valid_addr_bitmap); - addr += PAGE_SIZE; - } - - setup_valid_addr_bitmap_from_pavail(); - - high_memory = __va(last_valid_pfn << PAGE_SHIFT); - -#ifdef CONFIG_NEED_MULTIPLE_NODES - for_each_online_node(i) { - if (NODE_DATA(i)->node_spanned_pages != 0) { - totalram_pages += - free_all_bootmem_node(NODE_DATA(i)); - } - } -#else - totalram_pages = free_all_bootmem(); -#endif - - /* We subtract one to account for the mem_map_zero page - * allocated below. - */ - totalram_pages -= 1; - num_physpages = totalram_pages; - - /* - * Set up the zero page, mark it reserved, so that page count - * is not manipulated when freeing the page from user ptes. - */ - mem_map_zero = alloc_pages(GFP_KERNEL|__GFP_ZERO, 0); - if (mem_map_zero == NULL) { - prom_printf("paging_init: Cannot alloc zero page.\n"); - prom_halt(); - } - SetPageReserved(mem_map_zero); - - codepages = (((unsigned long) _etext) - ((unsigned long) _start)); - codepages = PAGE_ALIGN(codepages) >> PAGE_SHIFT; - datapages = (((unsigned long) _edata) - ((unsigned long) _etext)); - datapages = PAGE_ALIGN(datapages) >> PAGE_SHIFT; - initpages = (((unsigned long) __init_end) - ((unsigned long) __init_begin)); - initpages = PAGE_ALIGN(initpages) >> PAGE_SHIFT; - - printk("Memory: %luk available (%ldk kernel code, %ldk data, %ldk init) [%016lx,%016lx]\n", - nr_free_pages() << (PAGE_SHIFT-10), - codepages << (PAGE_SHIFT-10), - datapages << (PAGE_SHIFT-10), - initpages << (PAGE_SHIFT-10), - PAGE_OFFSET, (last_valid_pfn << PAGE_SHIFT)); - - if (tlb_type == cheetah || tlb_type == cheetah_plus) - cheetah_ecache_flush_init(); -} - -void free_initmem(void) -{ - unsigned long addr, initend; - int do_free = 1; - - /* If the physical memory maps were trimmed by kernel command - * line options, don't even try freeing this initmem stuff up. - * The kernel image could have been in the trimmed out region - * and if so the freeing below will free invalid page structs. - */ - if (cmdline_memory_size) - do_free = 0; - - /* - * The init section is aligned to 8k in vmlinux.lds. Page align for >8k pagesizes. - */ - addr = PAGE_ALIGN((unsigned long)(__init_begin)); - initend = (unsigned long)(__init_end) & PAGE_MASK; - for (; addr < initend; addr += PAGE_SIZE) { - unsigned long page; - struct page *p; - - page = (addr + - ((unsigned long) __va(kern_base)) - - ((unsigned long) KERNBASE)); - memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE); - - if (do_free) { - p = virt_to_page(page); - - ClearPageReserved(p); - init_page_count(p); - __free_page(p); - num_physpages++; - totalram_pages++; - } - } -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - if (start < end) - printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); - for (; start < end; start += PAGE_SIZE) { - struct page *p = virt_to_page(start); - - ClearPageReserved(p); - init_page_count(p); - __free_page(p); - num_physpages++; - totalram_pages++; - } -} -#endif - -#define _PAGE_CACHE_4U (_PAGE_CP_4U | _PAGE_CV_4U) -#define _PAGE_CACHE_4V (_PAGE_CP_4V | _PAGE_CV_4V) -#define __DIRTY_BITS_4U (_PAGE_MODIFIED_4U | _PAGE_WRITE_4U | _PAGE_W_4U) -#define __DIRTY_BITS_4V (_PAGE_MODIFIED_4V | _PAGE_WRITE_4V | _PAGE_W_4V) -#define __ACCESS_BITS_4U (_PAGE_ACCESSED_4U | _PAGE_READ_4U | _PAGE_R) -#define __ACCESS_BITS_4V (_PAGE_ACCESSED_4V | _PAGE_READ_4V | _PAGE_R) - -pgprot_t PAGE_KERNEL __read_mostly; -EXPORT_SYMBOL(PAGE_KERNEL); - -pgprot_t PAGE_KERNEL_LOCKED __read_mostly; -pgprot_t PAGE_COPY __read_mostly; - -pgprot_t PAGE_SHARED __read_mostly; -EXPORT_SYMBOL(PAGE_SHARED); - -unsigned long pg_iobits __read_mostly; - -unsigned long _PAGE_IE __read_mostly; -EXPORT_SYMBOL(_PAGE_IE); - -unsigned long _PAGE_E __read_mostly; -EXPORT_SYMBOL(_PAGE_E); - -unsigned long _PAGE_CACHE __read_mostly; -EXPORT_SYMBOL(_PAGE_CACHE); - -#ifdef CONFIG_SPARSEMEM_VMEMMAP -unsigned long vmemmap_table[VMEMMAP_SIZE]; - -int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node) -{ - unsigned long vstart = (unsigned long) start; - unsigned long vend = (unsigned long) (start + nr); - unsigned long phys_start = (vstart - VMEMMAP_BASE); - unsigned long phys_end = (vend - VMEMMAP_BASE); - unsigned long addr = phys_start & VMEMMAP_CHUNK_MASK; - unsigned long end = VMEMMAP_ALIGN(phys_end); - unsigned long pte_base; - - pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4U | - _PAGE_CP_4U | _PAGE_CV_4U | - _PAGE_P_4U | _PAGE_W_4U); - if (tlb_type == hypervisor) - pte_base = (_PAGE_VALID | _PAGE_SZ4MB_4V | - _PAGE_CP_4V | _PAGE_CV_4V | - _PAGE_P_4V | _PAGE_W_4V); - - for (; addr < end; addr += VMEMMAP_CHUNK) { - unsigned long *vmem_pp = - vmemmap_table + (addr >> VMEMMAP_CHUNK_SHIFT); - void *block; - - if (!(*vmem_pp & _PAGE_VALID)) { - block = vmemmap_alloc_block(1UL << 22, node); - if (!block) - return -ENOMEM; - - *vmem_pp = pte_base | __pa(block); - - printk(KERN_INFO "[%p-%p] page_structs=%lu " - "node=%d entry=%lu/%lu\n", start, block, nr, - node, - addr >> VMEMMAP_CHUNK_SHIFT, - VMEMMAP_SIZE >> VMEMMAP_CHUNK_SHIFT); - } - } - return 0; -} -#endif /* CONFIG_SPARSEMEM_VMEMMAP */ - -static void prot_init_common(unsigned long page_none, - unsigned long page_shared, - unsigned long page_copy, - unsigned long page_readonly, - unsigned long page_exec_bit) -{ - PAGE_COPY = __pgprot(page_copy); - PAGE_SHARED = __pgprot(page_shared); - - protection_map[0x0] = __pgprot(page_none); - protection_map[0x1] = __pgprot(page_readonly & ~page_exec_bit); - protection_map[0x2] = __pgprot(page_copy & ~page_exec_bit); - protection_map[0x3] = __pgprot(page_copy & ~page_exec_bit); - protection_map[0x4] = __pgprot(page_readonly); - protection_map[0x5] = __pgprot(page_readonly); - protection_map[0x6] = __pgprot(page_copy); - protection_map[0x7] = __pgprot(page_copy); - protection_map[0x8] = __pgprot(page_none); - protection_map[0x9] = __pgprot(page_readonly & ~page_exec_bit); - protection_map[0xa] = __pgprot(page_shared & ~page_exec_bit); - protection_map[0xb] = __pgprot(page_shared & ~page_exec_bit); - protection_map[0xc] = __pgprot(page_readonly); - protection_map[0xd] = __pgprot(page_readonly); - protection_map[0xe] = __pgprot(page_shared); - protection_map[0xf] = __pgprot(page_shared); -} - -static void __init sun4u_pgprot_init(void) -{ - unsigned long page_none, page_shared, page_copy, page_readonly; - unsigned long page_exec_bit; - - PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | - _PAGE_CACHE_4U | _PAGE_P_4U | - __ACCESS_BITS_4U | __DIRTY_BITS_4U | - _PAGE_EXEC_4U); - PAGE_KERNEL_LOCKED = __pgprot (_PAGE_PRESENT_4U | _PAGE_VALID | - _PAGE_CACHE_4U | _PAGE_P_4U | - __ACCESS_BITS_4U | __DIRTY_BITS_4U | - _PAGE_EXEC_4U | _PAGE_L_4U); - - _PAGE_IE = _PAGE_IE_4U; - _PAGE_E = _PAGE_E_4U; - _PAGE_CACHE = _PAGE_CACHE_4U; - - pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4U | __DIRTY_BITS_4U | - __ACCESS_BITS_4U | _PAGE_E_4U); - -#ifdef CONFIG_DEBUG_PAGEALLOC - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4U) ^ - 0xfffff80000000000UL; -#else - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4U) ^ - 0xfffff80000000000UL; -#endif - kern_linear_pte_xor[0] |= (_PAGE_CP_4U | _PAGE_CV_4U | - _PAGE_P_4U | _PAGE_W_4U); - - /* XXX Should use 256MB on Panther. XXX */ - kern_linear_pte_xor[1] = kern_linear_pte_xor[0]; - - _PAGE_SZBITS = _PAGE_SZBITS_4U; - _PAGE_ALL_SZ_BITS = (_PAGE_SZ4MB_4U | _PAGE_SZ512K_4U | - _PAGE_SZ64K_4U | _PAGE_SZ8K_4U | - _PAGE_SZ32MB_4U | _PAGE_SZ256MB_4U); - - - page_none = _PAGE_PRESENT_4U | _PAGE_ACCESSED_4U | _PAGE_CACHE_4U; - page_shared = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | - __ACCESS_BITS_4U | _PAGE_WRITE_4U | _PAGE_EXEC_4U); - page_copy = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | - __ACCESS_BITS_4U | _PAGE_EXEC_4U); - page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4U | _PAGE_CACHE_4U | - __ACCESS_BITS_4U | _PAGE_EXEC_4U); - - page_exec_bit = _PAGE_EXEC_4U; - - prot_init_common(page_none, page_shared, page_copy, page_readonly, - page_exec_bit); -} - -static void __init sun4v_pgprot_init(void) -{ - unsigned long page_none, page_shared, page_copy, page_readonly; - unsigned long page_exec_bit; - - PAGE_KERNEL = __pgprot (_PAGE_PRESENT_4V | _PAGE_VALID | - _PAGE_CACHE_4V | _PAGE_P_4V | - __ACCESS_BITS_4V | __DIRTY_BITS_4V | - _PAGE_EXEC_4V); - PAGE_KERNEL_LOCKED = PAGE_KERNEL; - - _PAGE_IE = _PAGE_IE_4V; - _PAGE_E = _PAGE_E_4V; - _PAGE_CACHE = _PAGE_CACHE_4V; - -#ifdef CONFIG_DEBUG_PAGEALLOC - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^ - 0xfffff80000000000UL; -#else - kern_linear_pte_xor[0] = (_PAGE_VALID | _PAGE_SZ4MB_4V) ^ - 0xfffff80000000000UL; -#endif - kern_linear_pte_xor[0] |= (_PAGE_CP_4V | _PAGE_CV_4V | - _PAGE_P_4V | _PAGE_W_4V); - -#ifdef CONFIG_DEBUG_PAGEALLOC - kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZBITS_4V) ^ - 0xfffff80000000000UL; -#else - kern_linear_pte_xor[1] = (_PAGE_VALID | _PAGE_SZ256MB_4V) ^ - 0xfffff80000000000UL; -#endif - kern_linear_pte_xor[1] |= (_PAGE_CP_4V | _PAGE_CV_4V | - _PAGE_P_4V | _PAGE_W_4V); - - pg_iobits = (_PAGE_VALID | _PAGE_PRESENT_4V | __DIRTY_BITS_4V | - __ACCESS_BITS_4V | _PAGE_E_4V); - - _PAGE_SZBITS = _PAGE_SZBITS_4V; - _PAGE_ALL_SZ_BITS = (_PAGE_SZ16GB_4V | _PAGE_SZ2GB_4V | - _PAGE_SZ256MB_4V | _PAGE_SZ32MB_4V | - _PAGE_SZ4MB_4V | _PAGE_SZ512K_4V | - _PAGE_SZ64K_4V | _PAGE_SZ8K_4V); - - page_none = _PAGE_PRESENT_4V | _PAGE_ACCESSED_4V | _PAGE_CACHE_4V; - page_shared = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | - __ACCESS_BITS_4V | _PAGE_WRITE_4V | _PAGE_EXEC_4V); - page_copy = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | - __ACCESS_BITS_4V | _PAGE_EXEC_4V); - page_readonly = (_PAGE_VALID | _PAGE_PRESENT_4V | _PAGE_CACHE_4V | - __ACCESS_BITS_4V | _PAGE_EXEC_4V); - - page_exec_bit = _PAGE_EXEC_4V; - - prot_init_common(page_none, page_shared, page_copy, page_readonly, - page_exec_bit); -} - -unsigned long pte_sz_bits(unsigned long sz) -{ - if (tlb_type == hypervisor) { - switch (sz) { - case 8 * 1024: - default: - return _PAGE_SZ8K_4V; - case 64 * 1024: - return _PAGE_SZ64K_4V; - case 512 * 1024: - return _PAGE_SZ512K_4V; - case 4 * 1024 * 1024: - return _PAGE_SZ4MB_4V; - }; - } else { - switch (sz) { - case 8 * 1024: - default: - return _PAGE_SZ8K_4U; - case 64 * 1024: - return _PAGE_SZ64K_4U; - case 512 * 1024: - return _PAGE_SZ512K_4U; - case 4 * 1024 * 1024: - return _PAGE_SZ4MB_4U; - }; - } -} - -pte_t mk_pte_io(unsigned long page, pgprot_t prot, int space, unsigned long page_size) -{ - pte_t pte; - - pte_val(pte) = page | pgprot_val(pgprot_noncached(prot)); - pte_val(pte) |= (((unsigned long)space) << 32); - pte_val(pte) |= pte_sz_bits(page_size); - - return pte; -} - -static unsigned long kern_large_tte(unsigned long paddr) -{ - unsigned long val; - - val = (_PAGE_VALID | _PAGE_SZ4MB_4U | - _PAGE_CP_4U | _PAGE_CV_4U | _PAGE_P_4U | - _PAGE_EXEC_4U | _PAGE_L_4U | _PAGE_W_4U); - if (tlb_type == hypervisor) - val = (_PAGE_VALID | _PAGE_SZ4MB_4V | - _PAGE_CP_4V | _PAGE_CV_4V | _PAGE_P_4V | - _PAGE_EXEC_4V | _PAGE_W_4V); - - return val | paddr; -} - -/* If not locked, zap it. */ -void __flush_tlb_all(void) -{ - unsigned long pstate; - int i; - - __asm__ __volatile__("flushw\n\t" - "rdpr %%pstate, %0\n\t" - "wrpr %0, %1, %%pstate" - : "=r" (pstate) - : "i" (PSTATE_IE)); - if (tlb_type == hypervisor) { - sun4v_mmu_demap_all(); - } else if (tlb_type == spitfire) { - for (i = 0; i < 64; i++) { - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - if (!(spitfire_get_dtlb_data(i) & _PAGE_L_4U)) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_DMMU)); - spitfire_put_dtlb_data(i, 0x0UL); - } - - /* Spitfire Errata #32 workaround */ - /* NOTE: Always runs on spitfire, so no - * cheetah+ page size encodings. - */ - __asm__ __volatile__("stxa %0, [%1] %2\n\t" - "flush %%g6" - : /* No outputs */ - : "r" (0), - "r" (PRIMARY_CONTEXT), "i" (ASI_DMMU)); - - if (!(spitfire_get_itlb_data(i) & _PAGE_L_4U)) { - __asm__ __volatile__("stxa %%g0, [%0] %1\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (TLB_TAG_ACCESS), "i" (ASI_IMMU)); - spitfire_put_itlb_data(i, 0x0UL); - } - } - } else if (tlb_type == cheetah || tlb_type == cheetah_plus) { - cheetah_flush_dtlb_all(); - cheetah_flush_itlb_all(); - } - __asm__ __volatile__("wrpr %0, 0, %%pstate" - : : "r" (pstate)); -} |