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Diffstat (limited to 'arch/sparc64/kernel/irq.c')
-rw-r--r--arch/sparc64/kernel/irq.c783
1 files changed, 0 insertions, 783 deletions
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
deleted file mode 100644
index 4e64724cb9a..00000000000
--- a/arch/sparc64/kernel/irq.c
+++ /dev/null
@@ -1,783 +0,0 @@
-/* $Id: irq.c,v 1.114 2002/01/11 08:45:38 davem Exp $
- * irq.c: UltraSparc IRQ handling/init/registry.
- *
- * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
- * 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/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/sbus.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>
-
-/* UPA nodes send interrupt packet to UltraSparc with first data reg
- * value low 5 (7 on Starfire) bits holding the IRQ identifier being
- * delivered. We must translate this into a non-vector IRQ so we can
- * set the softint on this cpu.
- *
- * To make processing these packets efficient and race free we use
- * an array of irq buckets below. The interrupt vector handler in
- * entry.S feeds incoming packets into per-cpu pil-indexed lists.
- * The IVEC handler does not need to act atomically, the PIL dispatch
- * code uses CAS to get an atomic snapshot of the list and clear it
- * at the same time.
- *
- * If you make changes to ino_bucket, please update hand coded assembler
- * of the vectored interrupt trap handler(s) in entry.S and sun4v_ivec.S
- */
-struct ino_bucket {
- /* Next handler in per-CPU IRQ worklist. We know that
- * bucket pointers have the high 32-bits clear, so to
- * save space we only store the bits we need.
- */
-/*0x00*/unsigned int irq_chain;
-
- /* Virtual interrupt number assigned to this INO. */
-/*0x04*/unsigned int virt_irq;
-};
-
-#define NUM_IVECS (IMAP_INR + 1)
-struct ino_bucket ivector_table[NUM_IVECS] __attribute__ ((aligned (SMP_CACHE_BYTES)));
-
-#define __irq_ino(irq) \
- (((struct ino_bucket *)(unsigned long)(irq)) - &ivector_table[0])
-#define __bucket(irq) ((struct ino_bucket *)(unsigned long)(irq))
-#define __irq(bucket) ((unsigned int)(unsigned long)(bucket))
-
-/* This has to be in the main kernel image, it cannot be
- * turned into per-cpu data. The reason is that the main
- * kernel image is locked into the TLB and this structure
- * is accessed from the vectored interrupt trap handler. If
- * access to this structure takes a TLB miss it could cause
- * the 5-level sparc v9 trap stack to overflow.
- */
-#define irq_work(__cpu) &(trap_block[(__cpu)].irq_worklist)
-
-static unsigned int virt_to_real_irq_table[NR_IRQS];
-static unsigned char virt_irq_cur = 1;
-
-static unsigned char virt_irq_alloc(unsigned int real_irq)
-{
- unsigned char ent;
-
- BUILD_BUG_ON(NR_IRQS >= 256);
-
- ent = virt_irq_cur;
- if (ent >= NR_IRQS) {
- printk(KERN_ERR "IRQ: Out of virtual IRQs.\n");
- return 0;
- }
-
- virt_irq_cur = ent + 1;
- virt_to_real_irq_table[ent] = real_irq;
-
- return ent;
-}
-
-#if 0 /* Currently unused. */
-static unsigned char real_to_virt_irq(unsigned int real_irq)
-{
- struct ino_bucket *bucket = __bucket(real_irq);
-
- return bucket->virt_irq;
-}
-#endif
-
-static unsigned int virt_to_real_irq(unsigned char virt_irq)
-{
- return virt_to_real_irq_table[virt_irq];
-}
-
-/*
- * /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;
-}
-
-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;
-}
-
-struct irq_handler_data {
- unsigned long iclr;
- unsigned long imap;
-
- void (*pre_handler)(unsigned int, void *, void *);
- void *pre_handler_arg1;
- void *pre_handler_arg2;
-};
-
-static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq)
-{
- unsigned int real_irq = virt_to_real_irq(virt_irq);
- struct ino_bucket *bucket = NULL;
-
- if (likely(real_irq))
- bucket = __bucket(real_irq);
-
- return bucket;
-}
-
-#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)
-{
- irq_desc_t *desc = irq_desc + virt_irq;
- struct irq_handler_data *data = desc->handler_data;
-
- if (likely(data)) {
- unsigned long cpuid, imap;
- unsigned int tid;
-
- cpuid = irq_choose_cpu(virt_irq);
- imap = data->imap;
-
- tid = sun4u_compute_tid(imap, cpuid);
-
- upa_writel(tid | IMAP_VALID, imap);
- }
-}
-
-static void sun4u_irq_disable(unsigned int virt_irq)
-{
- irq_desc_t *desc = irq_desc + virt_irq;
- struct irq_handler_data *data = desc->handler_data;
-
- if (likely(data)) {
- unsigned long imap = data->imap;
- u32 tmp = upa_readl(imap);
-
- tmp &= ~IMAP_VALID;
- upa_writel(tmp, imap);
- }
-}
-
-static void sun4u_irq_end(unsigned int virt_irq)
-{
- irq_desc_t *desc = irq_desc + virt_irq;
- struct irq_handler_data *data = desc->handler_data;
-
- if (likely(data))
- upa_writel(ICLR_IDLE, data->iclr);
-}
-
-static void sun4v_irq_enable(unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- unsigned long cpuid;
- int err;
-
- cpuid = irq_choose_cpu(virt_irq);
-
- 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);
- }
-}
-
-static void sun4v_irq_disable(unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- int err;
-
- err = sun4v_intr_setenabled(ino, HV_INTR_DISABLED);
- if (err != HV_EOK)
- printk("sun4v_intr_setenabled(%x): "
- "err(%d)\n", ino, err);
- }
-}
-
-static void sun4v_irq_end(unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = bucket - &ivector_table[0];
-
- if (likely(bucket)) {
- 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);
- }
-}
-
-static void run_pre_handler(unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- irq_desc_t *desc = irq_desc + virt_irq;
- struct irq_handler_data *data = desc->handler_data;
-
- if (likely(data->pre_handler)) {
- data->pre_handler(__irq_ino(__irq(bucket)),
- data->pre_handler_arg1,
- data->pre_handler_arg2);
- }
-}
-
-static struct hw_interrupt_type sun4u_irq = {
- .typename = "sun4u",
- .enable = sun4u_irq_enable,
- .disable = sun4u_irq_disable,
- .end = sun4u_irq_end,
-};
-
-static struct hw_interrupt_type sun4u_irq_ack = {
- .typename = "sun4u+ack",
- .enable = sun4u_irq_enable,
- .disable = sun4u_irq_disable,
- .ack = run_pre_handler,
- .end = sun4u_irq_end,
-};
-
-static struct hw_interrupt_type sun4v_irq = {
- .typename = "sun4v",
- .enable = sun4v_irq_enable,
- .disable = sun4v_irq_disable,
- .end = sun4v_irq_end,
-};
-
-static struct hw_interrupt_type sun4v_irq_ack = {
- .typename = "sun4v+ack",
- .enable = sun4v_irq_enable,
- .disable = sun4v_irq_disable,
- .ack = run_pre_handler,
- .end = sun4v_irq_end,
-};
-
-void irq_install_pre_handler(int virt_irq,
- void (*func)(unsigned int, void *, void *),
- void *arg1, void *arg2)
-{
- irq_desc_t *desc = irq_desc + virt_irq;
- struct irq_handler_data *data = desc->handler_data;
-
- data->pre_handler = func;
- data->pre_handler_arg1 = arg1;
- data->pre_handler_arg2 = arg2;
-
- if (desc->chip == &sun4u_irq_ack ||
- desc->chip == &sun4v_irq_ack)
- return;
-
- desc->chip = (desc->chip == &sun4u_irq ?
- &sun4u_irq_ack : &sun4v_irq_ack);
-}
-
-unsigned int build_irq(int inofixup, unsigned long iclr, unsigned long imap)
-{
- struct ino_bucket *bucket;
- struct irq_handler_data *data;
- irq_desc_t *desc;
- int ino;
-
- BUG_ON(tlb_type == hypervisor);
-
- ino = (upa_readl(imap) & (IMAP_IGN | IMAP_INO)) + inofixup;
- bucket = &ivector_table[ino];
- if (!bucket->virt_irq) {
- bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- irq_desc[bucket->virt_irq].chip = &sun4u_irq;
- }
-
- desc = irq_desc + bucket->virt_irq;
- if (unlikely(desc->handler_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();
- }
- desc->handler_data = data;
-
- data->imap = imap;
- data->iclr = iclr;
-
-out:
- return bucket->virt_irq;
-}
-
-unsigned int sun4v_build_irq(u32 devhandle, unsigned int devino)
-{
- struct ino_bucket *bucket;
- struct irq_handler_data *data;
- unsigned long sysino;
- irq_desc_t *desc;
-
- BUG_ON(tlb_type != hypervisor);
-
- sysino = sun4v_devino_to_sysino(devhandle, devino);
- bucket = &ivector_table[sysino];
- if (!bucket->virt_irq) {
- bucket->virt_irq = virt_irq_alloc(__irq(bucket));
- irq_desc[bucket->virt_irq].chip = &sun4v_irq;
- }
-
- desc = irq_desc + bucket->virt_irq;
- if (unlikely(desc->handler_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();
- }
- desc->handler_data = 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 bucket->virt_irq;
-}
-
-void hw_resend_irq(struct hw_interrupt_type *handler, unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned long pstate;
- unsigned int *ent;
-
- __asm__ __volatile__("rdpr %%pstate, %0" : "=r" (pstate));
- __asm__ __volatile__("wrpr %0, %1, %%pstate"
- : : "r" (pstate), "i" (PSTATE_IE));
- ent = irq_work(smp_processor_id());
- bucket->irq_chain = *ent;
- *ent = __irq(bucket);
- set_softint(1 << PIL_DEVICE_IRQ);
- __asm__ __volatile__("wrpr %0, 0x0, %%pstate" : : "r" (pstate));
-}
-
-void ack_bad_irq(unsigned int virt_irq)
-{
- struct ino_bucket *bucket = virt_irq_to_bucket(virt_irq);
- unsigned int ino = 0xdeadbeef;
-
- if (bucket)
- ino = bucket - &ivector_table[0];
-
- printk(KERN_CRIT "Unexpected IRQ from ino[%x] virt_irq[%u]\n",
- ino, virt_irq);
-}
-
-#ifndef CONFIG_SMP
-extern irqreturn_t timer_interrupt(int, void *, struct pt_regs *);
-
-void timer_irq(int irq, struct pt_regs *regs)
-{
- unsigned long clr_mask = 1 << irq;
- unsigned long tick_mask = tick_ops->softint_mask;
-
- if (get_softint() & tick_mask) {
- irq = 0;
- clr_mask = tick_mask;
- }
- clear_softint(clr_mask);
-
- irq_enter();
-
- kstat_this_cpu.irqs[0]++;
- timer_interrupt(irq, NULL, regs);
-
- irq_exit();
-}
-#endif
-
-void handler_irq(int irq, struct pt_regs *regs)
-{
- struct ino_bucket *bucket;
-
- clear_softint(1 << irq);
-
- irq_enter();
-
- /* Sliiiick... */
- bucket = __bucket(xchg32(irq_work(smp_processor_id()), 0));
- while (bucket) {
- struct ino_bucket *next = __bucket(bucket->irq_chain);
-
- bucket->irq_chain = 0;
- __do_IRQ(bucket->virt_irq, regs);
-
- bucket = next;
- }
-
- irq_exit();
-}
-
-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;
- 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 init_irqwork_curcpu(void)
-{
- int cpu = hard_smp_processor_id();
-
- trap_block[cpu].irq_worklist = 0;
-}
-
-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();
- }
-}
-
-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);
- }
-}
-
-static struct irqaction timer_irq_action = {
- .name = "timer",
-};
-
-/* Only invoked on boot processor. */
-void __init init_IRQ(void)
-{
- map_prom_timers();
- 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.
- */
- 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;
-}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 07:48:44 +0000