asmlinkage
void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
{
/*
* Since current-> is always on the stack, and we always switch
* the stack NMI-atomically, it's safe to use smp_processor_id().
*/
int sum, cpu;
int irq = NMIIRQ;
u8 wdt, tmp;
wdt = WDCTR & ~WDCTR_WDCNE;
WDCTR = wdt;
tmp = WDCTR;
NMICR = NMICR_WDIF;
nmi_count(smp_processor_id())++;
kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
for_each_online_cpu(cpu) {
sum = irq_stat[cpu].__irq_count;
if ((last_irq_sums[cpu] == sum)
#if defined(CONFIG_GDBSTUB) && defined(CONFIG_SMP)
&& !(CHK_GDBSTUB_BUSY()
|| atomic_read(&cpu_doing_single_step))
#endif
) {
/*
* Ayiee, looks like this CPU is stuck ...
* wait a few IRQs (5 seconds) before doing the oops ...
*/
watchdog_alert_counter[cpu]++;
if (watchdog_alert_counter[cpu] == 5 * watchdog_hz) {
spin_lock(&watchdog_print_lock);
/*
* We are in trouble anyway, lets at least try
* to get a message out.
*/
bust_spinlocks(1);
printk(KERN_ERR
"NMI Watchdog detected LOCKUP on CPU%d,"
" pc %08lx, registers:\n",
cpu, regs->pc);
#ifdef CONFIG_SMP
printk(KERN_ERR
"--- Register Dump (CPU%d) ---\n",
CPUID);
#endif
show_registers(regs);
#ifdef CONFIG_SMP
smp_nmi_call_function(watchdog_dump_register,
NULL, 1);
#endif
printk(KERN_NOTICE "console shuts up ...\n");
console_silent();
spin_unlock(&watchdog_print_lock);
bust_spinlocks(0);
#ifdef CONFIG_GDBSTUB
if (CHK_GDBSTUB_BUSY_AND_ACTIVE())
gdbstub_exception(regs, excep);
else
gdbstub_intercept(regs, excep);
#endif
do_exit(SIGSEGV);
}
} else {
last_irq_sums[cpu] = sum;
watchdog_alert_counter[cpu] = 0;
}
}
WDCTR = wdt | WDCTR_WDRST;
tmp = WDCTR;
WDCTR = wdt | WDCTR_WDCNE;
tmp = WDCTR;
}
asmlinkage
void watchdog_interrupt(struct pt_regs *regs, enum exception_code excep)
{
/*
*/
int sum, cpu;
int irq = NMIIRQ;
u8 wdt, tmp;
wdt = WDCTR & ~WDCTR_WDCNE;
WDCTR = wdt;
tmp = WDCTR;
NMICR = NMICR_WDIF;
nmi_count(smp_processor_id())++;
kstat_incr_irqs_this_cpu(irq, irq_to_desc(irq));
for_each_online_cpu(cpu) {
sum = irq_stat[cpu].__irq_count;
if ((last_irq_sums[cpu] == sum)
#if defined(CONFIG_GDBSTUB) && defined(CONFIG_SMP)
&& !(CHK_GDBSTUB_BUSY()
|| atomic_read(&cpu_doing_single_step))
#endif
) {
/*
*/
watchdog_alert_counter[cpu]++;
if (watchdog_alert_counter[cpu] == 5 * watchdog_hz) {
spin_lock(&watchdog_print_lock);
/*
*/
bust_spinlocks(1);
printk(KERN_ERR
"NMI Watchdog detected LOCKUP on CPU%d,"
" pc %08lx, registers:\n",
cpu, regs->pc);
#ifdef CONFIG_SMP
printk(KERN_ERR
"--- Register Dump (CPU%d) ---\n",
CPUID);
#endif
show_registers(regs);
#ifdef CONFIG_SMP
smp_nmi_call_function(watchdog_dump_register,
NULL, 1);
#endif
printk(KERN_NOTICE "console shuts up ...\n");
console_silent();
spin_unlock(&watchdog_print_lock);
bust_spinlocks(0);
#ifdef CONFIG_GDBSTUB
if (CHK_GDBSTUB_BUSY_AND_ACTIVE())
gdbstub_exception(regs, excep);
else
gdbstub_intercept(regs, excep);
#endif
do_exit(SIGSEGV);
}
} else {
last_irq_sums[cpu] = sum;
watchdog_alert_counter[cpu] = 0;
}
}
WDCTR = wdt | WDCTR_WDRST;
tmp = WDCTR;
WDCTR = wdt | WDCTR_WDCNE;
tmp = WDCTR;
}
