diff options
Diffstat (limited to 'arch/sparc64/kernel/irq.c')
| -rw-r--r-- | arch/sparc64/kernel/irq.c | 1038 |
1 files changed, 0 insertions, 1038 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c deleted file mode 100644 index 52fc836f464..00000000000 --- a/arch/sparc64/kernel/irq.c +++ /dev/null @@ -1,1038 +0,0 @@ -/* irq.c: UltraSparc IRQ handling/init/registry. - * - * Copyright (C) 1997, 2007, 2008 David S. Miller (davem@davemloft.net) - * Copyright (C) 1998 Eddie C. Dost (ecd@skynet.be) - * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz) - */ - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/linkage.h> -#include <linux/ptrace.h> -#include <linux/errno.h> -#include <linux/kernel_stat.h> -#include <linux/signal.h> -#include <linux/mm.h> -#include <linux/interrupt.h> -#include <linux/slab.h> -#include <linux/random.h> -#include <linux/init.h> -#include <linux/delay.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/bootmem.h> -#include <linux/irq.h> - -#include <asm/ptrace.h> -#include <asm/processor.h> -#include <asm/atomic.h> -#include <asm/system.h> -#include <asm/irq.h> -#include <asm/io.h> -#include <asm/iommu.h> -#include <asm/upa.h> -#include <asm/oplib.h> -#include <asm/prom.h> -#include <asm/timer.h> -#include <asm/smp.h> -#include <asm/starfire.h> -#include <asm/uaccess.h> -#include <asm/cache.h> -#include <asm/cpudata.h> -#include <asm/auxio.h> -#include <asm/head.h> -#include <asm/hypervisor.h> -#include <asm/cacheflush.h> - -#include "entry.h" - -#define NUM_IVECS (IMAP_INR + 1) - -struct ino_bucket *ivector_table; -unsigned long ivector_table_pa; - -/* On several sun4u processors, it is illegal to mix bypass and - * non-bypass accesses. Therefore we access all INO buckets - * using bypass accesses only. - */ -static unsigned long bucket_get_chain_pa(unsigned long bucket_pa) -{ - unsigned long ret; - - __asm__ __volatile__("ldxa [%1] %2, %0" - : "=&r" (ret) - : "r" (bucket_pa + - offsetof(struct ino_bucket, - __irq_chain_pa)), - "i" (ASI_PHYS_USE_EC)); - - return ret; -} - -static void bucket_clear_chain_pa(unsigned long bucket_pa) -{ - __asm__ __volatile__("stxa %%g0, [%0] %1" - : /* no outputs */ - : "r" (bucket_pa + - offsetof(struct ino_bucket, - __irq_chain_pa)), - "i" (ASI_PHYS_USE_EC)); -} - -static unsigned int bucket_get_virt_irq(unsigned long bucket_pa) -{ - unsigned int ret; - - __asm__ __volatile__("lduwa [%1] %2, %0" - : "=&r" (ret) - : "r" (bucket_pa + - offsetof(struct ino_bucket, - __virt_irq)), - "i" (ASI_PHYS_USE_EC)); - - return ret; -} - -static void bucket_set_virt_irq(unsigned long bucket_pa, - unsigned int virt_irq) -{ - __asm__ __volatile__("stwa %0, [%1] %2" - : /* no outputs */ - : "r" (virt_irq), - "r" (bucket_pa + - offsetof(struct ino_bucket, - __virt_irq)), - "i" (ASI_PHYS_USE_EC)); -} - -#define irq_work_pa(__cpu) &(trap_block[(__cpu)].irq_worklist_pa) - -static struct { - unsigned int dev_handle; - unsigned int dev_ino; - unsigned int in_use; -} virt_irq_table[NR_IRQS]; -static DEFINE_SPINLOCK(virt_irq_alloc_lock); - -unsigned char virt_irq_alloc(unsigned int dev_handle, - unsigned int dev_ino) -{ - unsigned long flags; - unsigned char ent; - - BUILD_BUG_ON(NR_IRQS >= 256); - - spin_lock_irqsave(&virt_irq_alloc_lock, flags); - - for (ent = 1; ent < NR_IRQS; ent++) { - if (!virt_irq_table[ent].in_use) - break; - } - if (ent >= NR_IRQS) { - printk(KERN_ERR "IRQ: Out of virtual IRQs.\n"); - ent = 0; - } else { - virt_irq_table[ent].dev_handle = dev_handle; - virt_irq_table[ent].dev_ino = dev_ino; - virt_irq_table[ent].in_use = 1; - } - - spin_unlock_irqrestore(&virt_irq_alloc_lock, flags); - - return ent; -} - -#ifdef CONFIG_PCI_MSI -void virt_irq_free(unsigned int virt_irq) -{ - unsigned long flags; - - if (virt_irq >= NR_IRQS) - return; - - spin_lock_irqsave(&virt_irq_alloc_lock, flags); - - virt_irq_table[virt_irq].in_use = 0; - - spin_unlock_irqrestore(&virt_irq_alloc_lock, flags); -} -#endif - -/* - * /proc/interrupts printing: - */ - -int show_interrupts(struct seq_file *p, void *v) -{ - int i = *(loff_t *) v, j; - struct irqaction * action; - unsigned long flags; - - if (i == 0) { - seq_printf(p, " "); - for_each_online_cpu(j) - seq_printf(p, "CPU%d ",j); - seq_putc(p, '\n'); - } - - if (i < NR_IRQS) { - spin_lock_irqsave(&irq_desc[i].lock, flags); - action = irq_desc[i].action; - if (!action) - goto skip; - seq_printf(p, "%3d: ",i); -#ifndef CONFIG_SMP - seq_printf(p, "%10u ", kstat_irqs(i)); -#else - for_each_online_cpu(j) - seq_printf(p, "%10u ", kstat_cpu(j).irqs[i]); -#endif - seq_printf(p, " %9s", irq_desc[i].chip->typename); - seq_printf(p, " %s", action->name); - - for (action=action->next; action; action = action->next) - seq_printf(p, ", %s", action->name); - - seq_putc(p, '\n'); -skip: - spin_unlock_irqrestore(&irq_desc[i].lock, flags); - } - return 0; -} - -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; -} - -struct irq_handler_data { - unsigned long iclr; - unsigned long imap; - - void (*pre_handler)(unsigned int, void *, void *); - void *arg1; - void *arg2; -}; - -#ifdef CONFIG_SMP -static int irq_choose_cpu(unsigned int virt_irq) -{ - cpumask_t mask = irq_desc[virt_irq].affinity; - int cpuid; - - if (cpus_equal(mask, CPU_MASK_ALL)) { - static int irq_rover; - static DEFINE_SPINLOCK(irq_rover_lock); - unsigned long flags; - - /* Round-robin distribution... */ - do_round_robin: - spin_lock_irqsave(&irq_rover_lock, flags); - - while (!cpu_online(irq_rover)) { - if (++irq_rover >= NR_CPUS) - irq_rover = 0; - } - cpuid = irq_rover; - do { - if (++irq_rover >= NR_CPUS) - irq_rover = 0; - } while (!cpu_online(irq_rover)); - - spin_unlock_irqrestore(&irq_rover_lock, flags); - } else { - cpumask_t tmp; - - cpus_and(tmp, cpu_online_map, mask); - - if (cpus_empty(tmp)) - goto do_round_robin; - - cpuid = first_cpu(tmp); - } - - return cpuid; -} -#else -static int irq_choose_cpu(unsigned int virt_irq) -{ - return real_hard_smp_processor_id(); -} -#endif - -static void sun4u_irq_enable(unsigned int virt_irq) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - - if (likely(data)) { - unsigned long cpuid, imap, val; - unsigned int tid; - - cpuid = irq_choose_cpu(virt_irq); - imap = data->imap; - - tid = sun4u_compute_tid(imap, cpuid); - - val = upa_readq(imap); - val &= ~(IMAP_TID_UPA | IMAP_TID_JBUS | - IMAP_AID_SAFARI | IMAP_NID_SAFARI); - val |= tid | IMAP_VALID; - upa_writeq(val, imap); - upa_writeq(ICLR_IDLE, data->iclr); - } -} - -static void sun4u_set_affinity(unsigned int virt_irq, cpumask_t mask) -{ - sun4u_irq_enable(virt_irq); -} - -static void sun4u_irq_disable(unsigned int virt_irq) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - - if (likely(data)) { - unsigned long imap = data->imap; - unsigned long tmp = upa_readq(imap); - - tmp &= ~IMAP_VALID; - upa_writeq(tmp, imap); - } -} - -static void sun4u_irq_eoi(unsigned int virt_irq) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - struct irq_desc *desc = irq_desc + virt_irq; - - if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS))) - return; - - if (likely(data)) - upa_writeq(ICLR_IDLE, data->iclr); -} - -static void sun4v_irq_enable(unsigned int virt_irq) -{ - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - unsigned long cpuid = irq_choose_cpu(virt_irq); - int err; - - err = sun4v_intr_settarget(ino, cpuid); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): " - "err(%d)\n", ino, cpuid, err); - err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_setstate(%x): " - "err(%d)\n", ino, err); - err = sun4v_intr_setenabled(ino, HV_INTR_ENABLED); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_setenabled(%x): err(%d)\n", - ino, err); -} - -static void sun4v_set_affinity(unsigned int virt_irq, cpumask_t mask) -{ - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - unsigned long cpuid = irq_choose_cpu(virt_irq); - int err; - - err = sun4v_intr_settarget(ino, cpuid); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_settarget(%x,%lu): " - "err(%d)\n", ino, cpuid, err); -} - -static void sun4v_irq_disable(unsigned int virt_irq) -{ - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - int err; - - err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_setenabled(%x): " - "err(%d)\n", ino, err); -} - -static void sun4v_irq_eoi(unsigned int virt_irq) -{ - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - struct irq_desc *desc = irq_desc + virt_irq; - int err; - - if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS))) - return; - - err = sun4v_intr_setstate(ino, HV_INTR_STATE_IDLE); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_intr_setstate(%x): " - "err(%d)\n", ino, err); -} - -static void sun4v_virq_enable(unsigned int virt_irq) -{ - unsigned long cpuid, dev_handle, dev_ino; - int err; - - cpuid = irq_choose_cpu(virt_irq); - - dev_handle = virt_irq_table[virt_irq].dev_handle; - dev_ino = virt_irq_table[virt_irq].dev_ino; - - err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): " - "err(%d)\n", - dev_handle, dev_ino, cpuid, err); - err = sun4v_vintr_set_state(dev_handle, dev_ino, - HV_INTR_STATE_IDLE); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx," - "HV_INTR_STATE_IDLE): err(%d)\n", - dev_handle, dev_ino, err); - err = sun4v_vintr_set_valid(dev_handle, dev_ino, - HV_INTR_ENABLED); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx," - "HV_INTR_ENABLED): err(%d)\n", - dev_handle, dev_ino, err); -} - -static void sun4v_virt_set_affinity(unsigned int virt_irq, cpumask_t mask) -{ - unsigned long cpuid, dev_handle, dev_ino; - int err; - - cpuid = irq_choose_cpu(virt_irq); - - dev_handle = virt_irq_table[virt_irq].dev_handle; - dev_ino = virt_irq_table[virt_irq].dev_ino; - - err = sun4v_vintr_set_target(dev_handle, dev_ino, cpuid); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_target(%lx,%lx,%lu): " - "err(%d)\n", - dev_handle, dev_ino, cpuid, err); -} - -static void sun4v_virq_disable(unsigned int virt_irq) -{ - unsigned long dev_handle, dev_ino; - int err; - - dev_handle = virt_irq_table[virt_irq].dev_handle; - dev_ino = virt_irq_table[virt_irq].dev_ino; - - err = sun4v_vintr_set_valid(dev_handle, dev_ino, - HV_INTR_DISABLED); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx," - "HV_INTR_DISABLED): err(%d)\n", - dev_handle, dev_ino, err); -} - -static void sun4v_virq_eoi(unsigned int virt_irq) -{ - struct irq_desc *desc = irq_desc + virt_irq; - unsigned long dev_handle, dev_ino; - int err; - - if (unlikely(desc->status & (IRQ_DISABLED|IRQ_INPROGRESS))) - return; - - dev_handle = virt_irq_table[virt_irq].dev_handle; - dev_ino = virt_irq_table[virt_irq].dev_ino; - - err = sun4v_vintr_set_state(dev_handle, dev_ino, - HV_INTR_STATE_IDLE); - if (err != HV_EOK) - printk(KERN_ERR "sun4v_vintr_set_state(%lx,%lx," - "HV_INTR_STATE_IDLE): err(%d)\n", - dev_handle, dev_ino, err); -} - -static struct irq_chip sun4u_irq = { - .typename = "sun4u", - .enable = sun4u_irq_enable, - .disable = sun4u_irq_disable, - .eoi = sun4u_irq_eoi, - .set_affinity = sun4u_set_affinity, -}; - -static struct irq_chip sun4v_irq = { - .typename = "sun4v", - .enable = sun4v_irq_enable, - .disable = sun4v_irq_disable, - .eoi = sun4v_irq_eoi, - .set_affinity = sun4v_set_affinity, -}; - -static struct irq_chip sun4v_virq = { - .typename = "vsun4v", - .enable = sun4v_virq_enable, - .disable = sun4v_virq_disable, - .eoi = sun4v_virq_eoi, - .set_affinity = sun4v_virt_set_affinity, -}; - -static void pre_flow_handler(unsigned int virt_irq, - struct irq_desc *desc) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - - data->pre_handler(ino, data->arg1, data->arg2); - - handle_fasteoi_irq(virt_irq, desc); -} - -void irq_install_pre_handler(int virt_irq, - void (*func)(unsigned int, void *, void *), - void *arg1, void *arg2) -{ - struct irq_handler_data *data = get_irq_chip_data(virt_irq); - struct irq_desc *desc = irq_desc + virt_irq; - - data->pre_handler = func; - data->arg1 = arg1; - data->arg2 = arg2; - - desc->handle_irq = pre_flow_handler; -} - -unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap) -{ - struct ino_bucket *bucket; - struct irq_handler_data *data; - unsigned int virt_irq; - int ino; - - BUG_ON(tlb_type == hypervisor); - - ino = (upa_readq(imap) & (IMAP_IGN | IMAP_INO)) + inofixup; - bucket = &ivector_table[ino]; - virt_irq = bucket_get_virt_irq(__pa(bucket)); - if (!virt_irq) { - virt_irq = virt_irq_alloc(0, ino); - bucket_set_virt_irq(__pa(bucket), virt_irq); - set_irq_chip_and_handler_name(virt_irq, - &sun4u_irq, - handle_fasteoi_irq, - "IVEC"); - } - - data = get_irq_chip_data(virt_irq); - if (unlikely(data)) - goto out; - - data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); - if (unlikely(!data)) { - prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n"); - prom_halt(); - } - set_irq_chip_data(virt_irq, data); - - data->imap = imap; - data->iclr = iclr; - -out: - return virt_irq; -} - -static unsigned int sun4v_build_common(unsigned long sysino, - struct irq_chip *chip) -{ - struct ino_bucket *bucket; - struct irq_handler_data *data; - unsigned int virt_irq; - - BUG_ON(tlb_type != hypervisor); - - bucket = &ivector_table[sysino]; - virt_irq = bucket_get_virt_irq(__pa(bucket)); - if (!virt_irq) { - virt_irq = virt_irq_alloc(0, sysino); - bucket_set_virt_irq(__pa(bucket), virt_irq); - set_irq_chip_and_handler_name(virt_irq, chip, - handle_fasteoi_irq, - "IVEC"); - } - - data = get_irq_chip_data(virt_irq); - if (unlikely(data)) - goto out; - - data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); - if (unlikely(!data)) { - prom_printf("IRQ: kzalloc(irq_handler_data) failed.\n"); - prom_halt(); - } - set_irq_chip_data(virt_irq, data); - - /* Catch accidental accesses to these things. IMAP/ICLR handling - * is done by hypervisor calls on sun4v platforms, not by direct - * register accesses. - */ - data->imap = ~0UL; - data->iclr = ~0UL; - -out: - return virt_irq; -} - -unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino) -{ - unsigned long sysino = sun4v_devino_to_sysino(devhandle, devino); - - return sun4v_build_common(sysino, &sun4v_irq); -} - -unsigned int sun4v_build_virq(u32 devhandle, unsigned int devino) -{ - struct irq_handler_data *data; - unsigned long hv_err, cookie; - struct ino_bucket *bucket; - struct irq_desc *desc; - unsigned int virt_irq; - - bucket = kzalloc(sizeof(struct ino_bucket), GFP_ATOMIC); - if (unlikely(!bucket)) - return 0; - __flush_dcache_range((unsigned long) bucket, - ((unsigned long) bucket + - sizeof(struct ino_bucket))); - - virt_irq = virt_irq_alloc(devhandle, devino); - bucket_set_virt_irq(__pa(bucket), virt_irq); - - set_irq_chip_and_handler_name(virt_irq, &sun4v_virq, - handle_fasteoi_irq, - "IVEC"); - - data = kzalloc(sizeof(struct irq_handler_data), GFP_ATOMIC); - if (unlikely(!data)) - return 0; - - /* In order to make the LDC channel startup sequence easier, - * especially wrt. locking, we do not let request_irq() enable - * the interrupt. - */ - desc = irq_desc + virt_irq; - desc->status |= IRQ_NOAUTOEN; - - set_irq_chip_data(virt_irq, data); - - /* Catch accidental accesses to these things. IMAP/ICLR handling - * is done by hypervisor calls on sun4v platforms, not by direct - * register accesses. - */ - data->imap = ~0UL; - data->iclr = ~0UL; - - cookie = ~__pa(bucket); - hv_err = sun4v_vintr_set_cookie(devhandle, devino, cookie); - if (hv_err) { - prom_printf("IRQ: Fatal, cannot set cookie for [%x:%x] " - "err=%lu\n", devhandle, devino, hv_err); - prom_halt(); - } - - return virt_irq; -} - -void ack_bad_irq(unsigned int virt_irq) -{ - unsigned int ino = virt_irq_table[virt_irq].dev_ino; - - if (!ino) - ino = 0xdeadbeef; - - printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n", - ino, virt_irq); -} - -void *hardirq_stack[NR_CPUS]; -void *softirq_stack[NR_CPUS]; - -static __attribute__((always_inline)) void *set_hardirq_stack(void) -{ - void *orig_sp, *sp = hardirq_stack[smp_processor_id()]; - - __asm__ __volatile__("mov %%sp, %0" : "=r" (orig_sp)); - if (orig_sp < sp || - orig_sp > (sp + THREAD_SIZE)) { - sp += THREAD_SIZE - 192 - STACK_BIAS; - __asm__ __volatile__("mov %0, %%sp" : : "r" (sp)); - } - - return orig_sp; -} -static __attribute__((always_inline)) void restore_hardirq_stack(void *orig_sp) -{ - __asm__ __volatile__("mov %0, %%sp" : : "r" (orig_sp)); -} - -void handler_irq(int irq, struct pt_regs *regs) -{ - unsigned long pstate, bucket_pa; - struct pt_regs *old_regs; - void *orig_sp; - - clear_softint(1 << irq); - - old_regs = set_irq_regs(regs); - irq_enter(); - - /* Grab an atomic snapshot of the pending IVECs. */ - __asm__ __volatile__("rdpr %%pstate, %0\n\t" - "wrpr %0, %3, %%pstate\n\t" - "ldx [%2], %1\n\t" - "stx %%g0, [%2]\n\t" - "wrpr %0, 0x0, %%pstate\n\t" - : "=&r" (pstate), "=&r" (bucket_pa) - : "r" (irq_work_pa(smp_processor_id())), - "i" (PSTATE_IE) - : "memory"); - - orig_sp = set_hardirq_stack(); - - while (bucket_pa) { - struct irq_desc *desc; - unsigned long next_pa; - unsigned int virt_irq; - - next_pa = bucket_get_chain_pa(bucket_pa); - virt_irq = bucket_get_virt_irq(bucket_pa); - bucket_clear_chain_pa(bucket_pa); - - desc = irq_desc + virt_irq; - - desc->handle_irq(virt_irq, desc); - - bucket_pa = next_pa; - } - - restore_hardirq_stack(orig_sp); - - irq_exit(); - set_irq_regs(old_regs); -} - -void do_softirq(void) -{ - unsigned long flags; - - if (in_interrupt()) - return; - - local_irq_save(flags); - - if (local_softirq_pending()) { - void *orig_sp, *sp = softirq_stack[smp_processor_id()]; - - sp += THREAD_SIZE - 192 - STACK_BIAS; - - __asm__ __volatile__("mov %%sp, %0\n\t" - "mov %1, %%sp" - : "=&r" (orig_sp) - : "r" (sp)); - __do_softirq(); - __asm__ __volatile__("mov %0, %%sp" - : : "r" (orig_sp)); - } - - local_irq_restore(flags); -} - -#ifdef CONFIG_HOTPLUG_CPU -void fixup_irqs(void) -{ - unsigned int irq; - - for (irq = 0; irq < NR_IRQS; irq++) { - unsigned long flags; - - spin_lock_irqsave(&irq_desc[irq].lock, flags); - if (irq_desc[irq].action && - !(irq_desc[irq].status & IRQ_PER_CPU)) { - if (irq_desc[irq].chip->set_affinity) - irq_desc[irq].chip->set_affinity(irq, - irq_desc[irq].affinity); - } - spin_unlock_irqrestore(&irq_desc[irq].lock, flags); - } - - tick_ops->disable_irq(); -} -#endif - -struct sun5_timer { - u64 count0; - u64 limit0; - u64 count1; - u64 limit1; -}; - -static struct sun5_timer *prom_timers; -static u64 prom_limit0, prom_limit1; - -static void map_prom_timers(void) -{ - struct device_node *dp; - const unsigned int *addr; - - /* PROM timer node hangs out in the top level of device siblings... */ - dp = of_find_node_by_path("/"); - dp = dp->child; - while (dp) { - if (!strcmp(dp->name, "counter-timer")) - break; - dp = dp->sibling; - } - - /* Assume if node is not present, PROM uses different tick mechanism - * which we should not care about. - */ - if (!dp) { - prom_timers = (struct sun5_timer *) 0; - return; - } - - /* If PROM is really using this, it must be mapped by him. */ - addr = of_get_property(dp, "address", NULL); - if (!addr) { - prom_printf("PROM does not have timer mapped, trying to continue.\n"); - prom_timers = (struct sun5_timer *) 0; - return; - } - prom_timers = (struct sun5_timer *) ((unsigned long)addr[0]); -} - -static void kill_prom_timer(void) -{ - if (!prom_timers) - return; - - /* Save them away for later. */ - prom_limit0 = prom_timers->limit0; - prom_limit1 = prom_timers->limit1; - - /* Just as in sun4c/sun4m PROM uses timer which ticks at IRQ 14. - * We turn both off here just to be paranoid. - */ - prom_timers->limit0 = 0; - prom_timers->limit1 = 0; - - /* Wheee, eat the interrupt packet too... */ - __asm__ __volatile__( -" mov 0x40, %%g2\n" -" ldxa [%%g0] %0, %%g1\n" -" ldxa [%%g2] %1, %%g1\n" -" stxa %%g0, [%%g0] %0\n" -" membar #Sync\n" - : /* no outputs */ - : "i" (ASI_INTR_RECEIVE), "i" (ASI_INTR_R) - : "g1", "g2"); -} - -void notrace init_irqwork_curcpu(void) -{ - int cpu = hard_smp_processor_id(); - - trap_block[cpu].irq_worklist_pa = 0UL; -} - -/* Please be very careful with register_one_mondo() and - * sun4v_register_mondo_queues(). - * - * On SMP this gets invoked from the CPU trampoline before - * the cpu has fully taken over the trap table from OBP, - * and it's kernel stack + %g6 thread register state is - * not fully cooked yet. - * - * Therefore you cannot make any OBP calls, not even prom_printf, - * from these two routines. - */ -static void __cpuinit register_one_mondo(unsigned long paddr, unsigned long type, unsigned long qmask) -{ - unsigned long num_entries = (qmask + 1) / 64; - 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(); - } -} - -void __cpuinit notrace 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, - tb->cpu_mondo_qmask); - register_one_mondo(tb->dev_mondo_pa, HV_CPU_QUEUE_DEVICE_MONDO, - tb->dev_mondo_qmask); - register_one_mondo(tb->resum_mondo_pa, HV_CPU_QUEUE_RES_ERROR, - tb->resum_qmask); - register_one_mondo(tb->nonresum_mondo_pa, HV_CPU_QUEUE_NONRES_ERROR, - tb->nonresum_qmask); -} - -static void __init alloc_one_mondo(unsigned long *pa_ptr, unsigned long qmask) -{ - unsigned long size = PAGE_ALIGN(qmask + 1); - void *p = __alloc_bootmem(size, size, 0); - if (!p) { - prom_printf("SUN4V: Error, cannot allocate mondo queue.\n"); - prom_halt(); - } - - *pa_ptr = __pa(p); -} - -static void __init alloc_one_kbuf(unsigned long *pa_ptr, unsigned long qmask) -{ - unsigned long size = PAGE_ALIGN(qmask + 1); - void *p = __alloc_bootmem(size, size, 0); - - if (!p) { - prom_printf("SUN4V: Error, cannot allocate kbuf page.\n"); - prom_halt(); - } - - *pa_ptr = __pa(p); -} - -static void __init init_cpu_send_mondo_info(struct trap_per_cpu *tb) -{ -#ifdef CONFIG_SMP - void *page; - - BUILD_BUG_ON((NR_CPUS * sizeof(u16)) > (PAGE_SIZE - 64)); - - page = alloc_bootmem_pages(PAGE_SIZE); - 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 mondo and error queues for all possible cpus. */ -static void __init sun4v_init_mondo_queues(void) -{ - int cpu; - - for_each_possible_cpu(cpu) { - struct trap_per_cpu *tb = &trap_block[cpu]; - - alloc_one_mondo(&tb->cpu_mondo_pa, tb->cpu_mondo_qmask); - alloc_one_mondo(&tb->dev_mondo_pa, tb->dev_mondo_qmask); - alloc_one_mondo(&tb->resum_mondo_pa, tb->resum_qmask); - alloc_one_kbuf(&tb->resum_kernel_buf_pa, tb->resum_qmask); - alloc_one_mondo(&tb->nonresum_mondo_pa, tb->nonresum_qmask); - alloc_one_kbuf(&tb->nonresum_kernel_buf_pa, - tb->nonresum_qmask); - } -} - -static void __init init_send_mondo_info(void) -{ - int cpu; - - for_each_possible_cpu(cpu) { - struct trap_per_cpu *tb = &trap_block[cpu]; - - init_cpu_send_mondo_info(tb); - } -} - -static struct irqaction timer_irq_action = { - .name = "timer", -}; - -/* Only invoked on boot processor. */ -void __init init_IRQ(void) -{ - unsigned long size; - - map_prom_timers(); - kill_prom_timer(); - - size = sizeof(struct ino_bucket) * NUM_IVECS; - ivector_table = alloc_bootmem(size); - if (!ivector_table) { - prom_printf("Fatal error, cannot allocate ivector_table\n"); - prom_halt(); - } - __flush_dcache_range((unsigned long) ivector_table, - ((unsigned long) ivector_table) + size); - - ivector_table_pa = __pa(ivector_table); - - if (tlb_type == hypervisor) - sun4v_init_mondo_queues(); - - init_send_mondo_info(); - - if (tlb_type == hypervisor) { - /* Load up the boot cpu's entries. */ - sun4v_register_mondo_queues(hard_smp_processor_id()); - } - - /* 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. - */ - clear_softint(get_softint()); - - /* Now that ivector table is initialized, it is safe - * to receive IRQ vector traps. We will normally take - * one or two right now, in case some device PROM used - * to boot us wants to speak to us. We just ignore them. - */ - __asm__ __volatile__("rdpr %%pstate, %%g1\n\t" - "or %%g1, %0, %%g1\n\t" - "wrpr %%g1, 0x0, %%pstate" - : /* No outputs */ - : "i" (PSTATE_IE) - : "g1"); - - irq_desc[0].action = &timer_irq_action; -} |