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| author | Michal Simek <monstr@monstr.eu> | 2010-06-10 16:04:05 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2010-08-04 10:22:39 +0200 |
| commit | c8f77436d11190d0d9379f4fb2c6f22a155c8d8e (patch) | |
| tree | 60a6b13d6d0f1dc86178400bc8ee789b4099fcde /arch/microblaze/kernel/timer.c | |
| parent | 615748aefa61066e8e5ec9d27521f37037b4c1a7 (diff) | |
| download | linux-c8f77436d11190d0d9379f4fb2c6f22a155c8d8e.tar.bz2 | |
microblaze: Decrease time shifting values
Lower shifting values ensure that shifted 32bit counter
value doesn't exceed 64bit cycle variable too fast.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/kernel/timer.c')
| -rw-r--r-- | arch/microblaze/kernel/timer.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c index 22e296eb871b..b1380ae93ae1 100644 --- a/arch/microblaze/kernel/timer.c +++ b/arch/microblaze/kernel/timer.c @@ -28,6 +28,7 @@ #include <asm/prom.h> #include <asm/irq.h> #include <asm/system.h> +#include <linux/cnt32_to_63.h> #ifdef CONFIG_SELFMOD_TIMER #include <asm/selfmod.h> @@ -135,7 +136,7 @@ static void microblaze_timer_set_mode(enum clock_event_mode mode, static struct clock_event_device clockevent_microblaze_timer = { .name = "microblaze_clockevent", .features = CLOCK_EVT_FEAT_ONESHOT | CLOCK_EVT_FEAT_PERIODIC, - .shift = 24, + .shift = 8, .rating = 300, .set_next_event = microblaze_timer_set_next_event, .set_mode = microblaze_timer_set_mode, @@ -195,7 +196,7 @@ static cycle_t microblaze_cc_read(const struct cyclecounter *cc) static struct cyclecounter microblaze_cc = { .read = microblaze_cc_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, + .shift = 8, }; int __init init_microblaze_timecounter(void) @@ -213,7 +214,7 @@ static struct clocksource clocksource_microblaze = { .rating = 300, .read = microblaze_read, .mask = CLOCKSOURCE_MASK(32), - .shift = 24, /* I can shift it */ + .shift = 8, /* I can shift it */ .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; @@ -302,7 +303,7 @@ unsigned long long notrace sched_clock(void) { if (timer_initialized) { struct clocksource *cs = &clocksource_microblaze; - cycle_t cyc = cs->read(NULL); + cycle_t cyc = cnt32_to_63(cs->read(NULL)); return clocksource_cyc2ns(cyc, cs->mult, cs->shift); } return 0; |