From c8f77436d11190d0d9379f4fb2c6f22a155c8d8e Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Thu, 10 Jun 2010 16:04:05 +0200 Subject: 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 --- arch/microblaze/kernel/timer.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'arch/microblaze/kernel') 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 #include #include +#include #ifdef CONFIG_SELFMOD_TIMER #include @@ -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; -- cgit v1.2.3-59-g8ed1b