static int arch_timer_dying_cpu(unsigned int cpu)
{
struct clock_event_device *clk = this_cpu_ptr(arch_timer_evt);
arch_timer_stop(clk);
return 0;
}
static void arch_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *clk)
{
switch (mode) {
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
arch_timer_stop();
break;
default:
break;
}
}
static int arch_timer_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
{
/*
* Grab cpu pointer in each case to avoid spurious
* preemptible warnings
*/
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_STARTING:
arch_timer_setup(this_cpu_ptr(arch_timer_evt));
break;
case CPU_DYING:
arch_timer_stop(this_cpu_ptr(arch_timer_evt));
break;
}
return NOTIFY_OK;
}
static void __cpuinit arch_timer_setup(struct clock_event_device *clk)
{
/* Let's make sure the timer is off before doing anything else */
arch_timer_stop();
clk->features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_C3STOP;
clk->name = "arch_sys_timer";
clk->rating = 400;
clk->set_mode = arch_timer_set_mode;
clk->set_next_event = arch_timer_set_next_event;
clk->irq = arch_timer_ppi;
clk->cpumask = cpumask_of(smp_processor_id());
clockevents_config_and_register(clk, arch_timer_rate,
0xf, 0x7fffffff);
enable_percpu_irq(clk->irq, 0);
/* Ensure the physical counter is visible to userspace for the vDSO. */
arch_counter_enable_user_access();
}
void local_timer_stop(struct clock_event_device *evt)
{
arch_timer_stop(evt);
}
