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author | Michal Simek <monstr@monstr.eu> | 2009-11-06 12:31:00 +0100 |
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committer | Michal Simek <monstr@monstr.eu> | 2009-12-14 08:40:09 +0100 |
commit | 519e9f417388ba055b7604db5f4f492f7c84f427 (patch) | |
tree | 0dc1f78f1911d342d2b10fd085a01cbaa45217b6 /arch/microblaze | |
parent | 24b45a12c21132e78e14f3aedf74bb1297228072 (diff) | |
download | op-kernel-dev-519e9f417388ba055b7604db5f4f492f7c84f427.zip op-kernel-dev-519e9f417388ba055b7604db5f4f492f7c84f427.tar.gz |
microblaze: Register timecounter/cyclecounter
It is the same counter as we use as free running one.
I would like to use it for ftrace.
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
-rw-r--r-- | arch/microblaze/kernel/timer.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/microblaze/kernel/timer.c b/arch/microblaze/kernel/timer.c index 5499dea..ed61b2f 100644 --- a/arch/microblaze/kernel/timer.c +++ b/arch/microblaze/kernel/timer.c @@ -183,6 +183,31 @@ static cycle_t microblaze_read(struct clocksource *cs) return (cycle_t) (in_be32(TIMER_BASE + TCR1)); } +static struct timecounter microblaze_tc = { + .cc = NULL, +}; + +static cycle_t microblaze_cc_read(const struct cyclecounter *cc) +{ + return microblaze_read(NULL); +} + +static struct cyclecounter microblaze_cc = { + .read = microblaze_cc_read, + .mask = CLOCKSOURCE_MASK(32), + .shift = 24, +}; + +int __init init_microblaze_timecounter(void) +{ + microblaze_cc.mult = div_sc(cpuinfo.cpu_clock_freq, NSEC_PER_SEC, + microblaze_cc.shift); + + timecounter_init(µblaze_tc, µblaze_cc, sched_clock()); + + return 0; +} + static struct clocksource clocksource_microblaze = { .name = "microblaze_clocksource", .rating = 300, @@ -204,6 +229,9 @@ static int __init microblaze_clocksource_init(void) out_be32(TIMER_BASE + TCSR1, in_be32(TIMER_BASE + TCSR1) & ~TCSR_ENT); /* start timer1 - up counting without interrupt */ out_be32(TIMER_BASE + TCSR1, TCSR_TINT|TCSR_ENT|TCSR_ARHT); + + /* register timecounter - for ftrace support */ + init_microblaze_timecounter(); return 0; } |