diff options
| author | Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> | 2015-03-07 10:30:34 -0800 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-01 17:21:33 +0200 |
| commit | 262f1c92912fcf4150cafb1b1e78a2e4e646d008 (patch) | |
| tree | 89f284c735770ee55f77b09da48876de4423869b /arch/mips/kernel/csrc-sb1250.c | |
| parent | 0dc886aba2c170118da8986c8ec73cc9902f7340 (diff) | |
| download | linux-0-day-262f1c92912fcf4150cafb1b1e78a2e4e646d008.tar.gz linux-0-day-262f1c92912fcf4150cafb1b1e78a2e4e646d008.tar.xz | |
MIPS: csrc-sb1250: Implement read_sched_clock
Use sb1250 hpt for sched_clock source. This implementation will give high
resolution cputime accounting.
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: macro@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9488/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/csrc-sb1250.c')
| -rw-r--r-- | arch/mips/kernel/csrc-sb1250.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/csrc-sb1250.c b/arch/mips/kernel/csrc-sb1250.c index 1ecfa4bc842a6..d915652b4d56f 100644 --- a/arch/mips/kernel/csrc-sb1250.c +++ b/arch/mips/kernel/csrc-sb1250.c @@ -12,6 +12,7 @@ * GNU General Public License for more details. */ #include <linux/clocksource.h> +#include <linux/sched_clock.h> #include <asm/addrspace.h> #include <asm/io.h> @@ -53,6 +54,11 @@ struct clocksource bcm1250_clocksource = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +static u64 notrace sb1250_read_sched_clock(void) +{ + return sb1250_hpt_get_cycles(); +} + void __init sb1250_clocksource_init(void) { struct clocksource *cs = &bcm1250_clocksource; @@ -69,4 +75,6 @@ void __init sb1250_clocksource_init(void) R_SCD_TIMER_CFG))); clocksource_register_hz(cs, V_SCD_TIMER_FREQ); + + sched_clock_register(sb1250_read_sched_clock, 23, V_SCD_TIMER_FREQ); } |