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Diffstat (limited to 'arch/xtensa/kernel/time.c')
-rw-r--r--arch/xtensa/kernel/time.c61
1 files changed, 34 insertions, 27 deletions
diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
index 9af3dd88ad7e..08b769d3b3a1 100644
--- a/arch/xtensa/kernel/time.c
+++ b/arch/xtensa/kernel/time.c
@@ -36,7 +36,7 @@ static cycle_t ccount_read(struct clocksource *cs)
return (cycle_t)get_ccount();
}
-static u32 notrace ccount_sched_clock_read(void)
+static u64 notrace ccount_sched_clock_read(void)
{
return get_ccount();
}
@@ -46,24 +46,19 @@ static struct clocksource ccount_clocksource = {
.rating = 200,
.read = ccount_read,
.mask = CLOCKSOURCE_MASK(32),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
static int ccount_timer_set_next_event(unsigned long delta,
struct clock_event_device *dev);
static void ccount_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt);
-static struct ccount_timer_t {
+struct ccount_timer {
struct clock_event_device evt;
int irq_enabled;
-} ccount_timer = {
- .evt = {
- .name = "ccount_clockevent",
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .rating = 300,
- .set_next_event = ccount_timer_set_next_event,
- .set_mode = ccount_timer_set_mode,
- },
+ char name[24];
};
+static DEFINE_PER_CPU(struct ccount_timer, ccount_timer);
static int ccount_timer_set_next_event(unsigned long delta,
struct clock_event_device *dev)
@@ -84,8 +79,8 @@ static int ccount_timer_set_next_event(unsigned long delta,
static void ccount_timer_set_mode(enum clock_event_mode mode,
struct clock_event_device *evt)
{
- struct ccount_timer_t *timer =
- container_of(evt, struct ccount_timer_t, evt);
+ struct ccount_timer *timer =
+ container_of(evt, struct ccount_timer, evt);
/*
* There is no way to disable the timer interrupt at the device level,
@@ -117,9 +112,28 @@ static struct irqaction timer_irqaction = {
.handler = timer_interrupt,
.flags = IRQF_TIMER,
.name = "timer",
- .dev_id = &ccount_timer,
};
+void local_timer_setup(unsigned cpu)
+{
+ struct ccount_timer *timer = &per_cpu(ccount_timer, cpu);
+ struct clock_event_device *clockevent = &timer->evt;
+
+ timer->irq_enabled = 1;
+ clockevent->name = timer->name;
+ snprintf(timer->name, sizeof(timer->name), "ccount_clockevent_%u", cpu);
+ clockevent->features = CLOCK_EVT_FEAT_ONESHOT;
+ clockevent->rating = 300;
+ clockevent->set_next_event = ccount_timer_set_next_event;
+ clockevent->set_mode = ccount_timer_set_mode;
+ clockevent->cpumask = cpumask_of(cpu);
+ clockevent->irq = irq_create_mapping(NULL, LINUX_TIMER_INT);
+ if (WARN(!clockevent->irq, "error: can't map timer irq"))
+ return;
+ clockevents_config_and_register(clockevent, ccount_freq,
+ 0xf, 0xffffffff);
+}
+
void __init time_init(void)
{
#ifdef CONFIG_XTENSA_CALIBRATE_CCOUNT
@@ -131,28 +145,21 @@ void __init time_init(void)
ccount_freq = CONFIG_XTENSA_CPU_CLOCK*1000000UL;
#endif
clocksource_register_hz(&ccount_clocksource, ccount_freq);
-
- ccount_timer.evt.cpumask = cpumask_of(0);
- ccount_timer.evt.irq = irq_create_mapping(NULL, LINUX_TIMER_INT);
- if (WARN(!ccount_timer.evt.irq, "error: can't map timer irq"))
- return;
- clockevents_config_and_register(&ccount_timer.evt, ccount_freq, 0xf,
- 0xffffffff);
- setup_irq(ccount_timer.evt.irq, &timer_irqaction);
- ccount_timer.irq_enabled = 1;
-
- setup_sched_clock(ccount_sched_clock_read, 32, ccount_freq);
+ local_timer_setup(0);
+ setup_irq(this_cpu_ptr(&ccount_timer)->evt.irq, &timer_irqaction);
+ sched_clock_register(ccount_sched_clock_read, 32, ccount_freq);
+ clocksource_of_init();
}
/*
* The timer interrupt is called HZ times per second.
*/
-irqreturn_t timer_interrupt (int irq, void *dev_id)
+irqreturn_t timer_interrupt(int irq, void *dev_id)
{
- struct ccount_timer_t *timer = dev_id;
- struct clock_event_device *evt = &timer->evt;
+ struct clock_event_device *evt = &this_cpu_ptr(&ccount_timer)->evt;
+ set_linux_timer(get_linux_timer());
evt->event_handler(evt);
/* Allow platform to do something useful (Wdog). */