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authorDeng-Cheng Zhu <dengcheng.zhu@imgtec.com>2015-03-07 18:30:34 (GMT)
committerRalf Baechle <ralf@linux-mips.org>2015-04-01 15:21:33 (GMT)
commit262f1c92912fcf4150cafb1b1e78a2e4e646d008 (patch)
tree89f284c735770ee55f77b09da48876de4423869b
parent0dc886aba2c170118da8986c8ec73cc9902f7340 (diff)
downloadlinux-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>
-rw-r--r--arch/mips/kernel/csrc-sb1250.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kernel/csrc-sb1250.c b/arch/mips/kernel/csrc-sb1250.c
index 1ecfa4b..d915652 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);
}