#include <linux/seq_file.h>
#include <linux/module.h>
#include <linux/delay.h>
+#include <linux/ftrace.h>
#include <asm/uaccess.h>
#include <asm/io_apic.h>
#include <asm/idle.h>
#include <asm/smp.h>
-atomic_t irq_err_count;
-
-/*
- * 'what should we do if we get a hw irq event on an illegal vector'.
- * each architecture has to answer this themselves.
- */
-void ack_bad_irq(unsigned int irq)
-{
- printk(KERN_WARNING "unexpected IRQ trap at vector %02x\n", irq);
- /*
- * Currently unexpected vectors happen only on SMP and APIC.
- * We _must_ ack these because every local APIC has only N
- * irq slots per priority level, and a 'hanging, unacked' IRQ
- * holds up an irq slot - in excessive cases (when multiple
- * unexpected vectors occur) that might lock up the APIC
- * completely.
- * But don't ack when the APIC is disabled. -AK
- */
- if (!disable_apic)
- ack_APIC_irq();
-}
-
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
/*
* Probabilistic stack overflow check:
*
*/
static inline void stack_overflow_check(struct pt_regs *regs)
{
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
u64 curbase = (u64)task_stack_page(current);
- static unsigned long warned = -60*HZ;
-
- if (regs->sp >= curbase && regs->sp <= curbase + THREAD_SIZE &&
- regs->sp < curbase + sizeof(struct thread_info) + 128 &&
- time_after(jiffies, warned + 60*HZ)) {
- printk("do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
- current->comm, curbase, regs->sp);
- show_stack(NULL,NULL);
- warned = jiffies;
- }
-}
-#endif
-
-/*
- * Generic, controller-independent functions:
- */
-
-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%-8d",j);
- seq_putc(p, '\n');
- }
- if (i < NR_IRQS) {
- unsigned any_count = 0;
+ WARN_ONCE(regs->sp >= curbase &&
+ regs->sp <= curbase + THREAD_SIZE &&
+ regs->sp < curbase + sizeof(struct thread_info) +
+ sizeof(struct pt_regs) + 128,
- spin_lock_irqsave(&irq_desc[i].lock, flags);
-#ifndef CONFIG_SMP
- any_count = kstat_irqs(i);
-#else
- for_each_online_cpu(j)
- any_count |= kstat_cpu(j).irqs[i];
+ "do_IRQ: %s near stack overflow (cur:%Lx,sp:%lx)\n",
+ current->comm, curbase, regs->sp);
#endif
- action = irq_desc[i].action;
- if (!action && !any_count)
- 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, " %8s", irq_desc[i].chip->name);
- seq_printf(p, "-%-8s", irq_desc[i].name);
-
- if (action) {
- seq_printf(p, " %s", action->name);
- while ((action = action->next) != NULL)
- seq_printf(p, ", %s", action->name);
- }
- seq_putc(p, '\n');
-skip:
- spin_unlock_irqrestore(&irq_desc[i].lock, flags);
- } else if (i == NR_IRQS) {
- seq_printf(p, "NMI: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->__nmi_count);
- seq_printf(p, " Non-maskable interrupts\n");
- seq_printf(p, "LOC: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->apic_timer_irqs);
- seq_printf(p, " Local timer interrupts\n");
-#ifdef CONFIG_SMP
- seq_printf(p, "RES: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_resched_count);
- seq_printf(p, " Rescheduling interrupts\n");
- seq_printf(p, "CAL: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_call_count);
- seq_printf(p, " Function call interrupts\n");
- seq_printf(p, "TLB: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_tlb_count);
- seq_printf(p, " TLB shootdowns\n");
-#endif
-#ifdef CONFIG_X86_MCE
- seq_printf(p, "TRM: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_thermal_count);
- seq_printf(p, " Thermal event interrupts\n");
- seq_printf(p, "THR: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_threshold_count);
- seq_printf(p, " Threshold APIC interrupts\n");
-#endif
- seq_printf(p, "SPU: ");
- for_each_online_cpu(j)
- seq_printf(p, "%10u ", cpu_pda(j)->irq_spurious_count);
- seq_printf(p, " Spurious interrupts\n");
- seq_printf(p, "ERR: %10u\n", atomic_read(&irq_err_count));
- }
- return 0;
-}
-
-/*
- * /proc/stat helpers
- */
-u64 arch_irq_stat_cpu(unsigned int cpu)
-{
- u64 sum = cpu_pda(cpu)->__nmi_count;
-
- sum += cpu_pda(cpu)->apic_timer_irqs;
-#ifdef CONFIG_SMP
- sum += cpu_pda(cpu)->irq_resched_count;
- sum += cpu_pda(cpu)->irq_call_count;
- sum += cpu_pda(cpu)->irq_tlb_count;
-#endif
-#ifdef CONFIG_X86_MCE
- sum += cpu_pda(cpu)->irq_thermal_count;
- sum += cpu_pda(cpu)->irq_threshold_count;
-#endif
- sum += cpu_pda(cpu)->irq_spurious_count;
- return sum;
-}
-
-u64 arch_irq_stat(void)
-{
- return atomic_read(&irq_err_count);
}
/*
* SMP cross-CPU interrupts have their own specific
* handlers).
*/
-asmlinkage unsigned int do_IRQ(struct pt_regs *regs)
+asmlinkage unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
+ struct irq_desc *desc;
/* high bit used in ret_from_ code */
unsigned vector = ~regs->orig_ax;
irq_enter();
irq = __get_cpu_var(vector_irq)[vector];
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
stack_overflow_check(regs);
-#endif
- if (likely(irq < NR_IRQS))
- generic_handle_irq(irq);
+ desc = irq_to_desc(irq);
+ if (likely(desc))
+ generic_handle_irq_desc(irq, desc);
else {
if (!disable_apic)
ack_APIC_irq();
{
unsigned int irq;
static int warned;
+ struct irq_desc *desc;
- for (irq = 0; irq < NR_IRQS; irq++) {
+ for_each_irq_desc(irq, desc) {
cpumask_t mask;
int break_affinity = 0;
int set_affinity = 1;
continue;
/* interrupt's are disabled at this point */
- spin_lock(&irq_desc[irq].lock);
+ spin_lock(&desc->lock);
if (!irq_has_action(irq) ||
- cpus_equal(irq_desc[irq].affinity, map)) {
- spin_unlock(&irq_desc[irq].lock);
+ cpus_equal(desc->affinity, map)) {
+ spin_unlock(&desc->lock);
continue;
}
- cpus_and(mask, irq_desc[irq].affinity, map);
+ cpus_and(mask, desc->affinity, map);
if (cpus_empty(mask)) {
break_affinity = 1;
mask = map;
}
- if (irq_desc[irq].chip->mask)
- irq_desc[irq].chip->mask(irq);
+ if (desc->chip->mask)
+ desc->chip->mask(irq);
- if (irq_desc[irq].chip->set_affinity)
- irq_desc[irq].chip->set_affinity(irq, mask);
+ if (desc->chip->set_affinity)
+ desc->chip->set_affinity(irq, mask);
else if (!(warned++))
set_affinity = 0;
- if (irq_desc[irq].chip->unmask)
- irq_desc[irq].chip->unmask(irq);
+ if (desc->chip->unmask)
+ desc->chip->unmask(irq);
- spin_unlock(&irq_desc[irq].lock);
+ spin_unlock(&desc->lock);
if (break_affinity && set_affinity)
printk("Broke affinity for irq %i\n", irq);
git.openpandora.org / pandora-kernel.git / blobdiff