/*
* Main handler for inter-processor interrupts
*/
void handle_IPI(int ipinr, struct pt_regs *regs)
{
unsigned int cpu = smp_processor_id();
struct pt_regs *old_regs = set_irq_regs(regs);
if ((unsigned)ipinr < NR_IPI) {
trace_ipi_entry(ipi_types[ipinr]);
__inc_irq_stat(cpu, ipi_irqs[ipinr]);
}
switch (ipinr) {
case IPI_RESCHEDULE:
scheduler_ipi();
break;
case IPI_CALL_FUNC:
irq_enter();
mt_trace_ISR_start(ipinr);
generic_smp_call_function_interrupt();
mt_trace_ISR_end(ipinr);
irq_exit();
break;
case IPI_CALL_FUNC_SINGLE:
irq_enter();
mt_trace_ISR_start(ipinr);
generic_smp_call_function_single_interrupt();
mt_trace_ISR_end(ipinr);
irq_exit();
break;
case IPI_CPU_STOP:
irq_enter();
mt_trace_ISR_start(ipinr);
ipi_cpu_stop(cpu);
mt_trace_ISR_end(ipinr);
irq_exit();
break;
default:
pr_crit("CPU%u: Unknown IPI message 0x%x\n", cpu, ipinr);
break;
}
if ((unsigned)ipinr < NR_IPI)
trace_ipi_exit(ipi_types[ipinr]);
set_irq_regs(old_regs);
}
/*
* handle_IRQ handles all hardware IRQ's. Decoded IRQs should
* not come via this function. Instead, they should provide their
* own 'handler'. Used by platform code implementing C-based 1st
* level decoding.
*/
void handle_IRQ(unsigned int irq, struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
#ifdef CONFIG_MTK_SCHED_TRACERS
struct irq_desc *desc;
#endif
mt_trace_ISR_start(irq);
irq_enter();
#ifdef CONFIG_MTK_SCHED_TRACERS
desc = irq_to_desc(irq);
trace_irq_entry(irq,
(desc && desc->action && desc->action->name) ? desc->action->name : "-");
#endif
/*
* Some hardware gives randomly wrong interrupts. Rather
* than crashing, do something sensible.
*/
if (unlikely(irq >= nr_irqs)) {
if (printk_ratelimit())
printk(KERN_WARNING "Bad IRQ%u\n", irq);
ack_bad_irq(irq);
} else {
generic_handle_irq(irq);
}
#ifdef CONFIG_MTK_SCHED_TRACERS
trace_irq_exit(irq);
#endif
mt_trace_ISR_end(irq);
irq_exit();
set_irq_regs(old_regs);
}