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-rw-r--r--arch/i386/kernel/timers/common.c9
-rw-r--r--arch/i386/kernel/timers/timer.c9
-rw-r--r--arch/i386/kernel/timers/timer_hpet.c1
-rw-r--r--arch/i386/kernel/timers/timer_pm.c1
-rw-r--r--arch/i386/kernel/timers/timer_tsc.c1
-rw-r--r--arch/x86_64/lib/delay.c7
6 files changed, 28 insertions, 0 deletions
diff --git a/arch/i386/kernel/timers/common.c b/arch/i386/kernel/timers/common.c
index 8e201219f52..b38cc0d0c71 100644
--- a/arch/i386/kernel/timers/common.c
+++ b/arch/i386/kernel/timers/common.c
@@ -139,6 +139,15 @@ bad_calibration:
}
#endif
+
+unsigned long read_timer_tsc(void)
+{
+ unsigned long retval;
+ rdtscl(retval);
+ return retval;
+}
+
+
/* calculate cpu_khz */
void init_cpu_khz(void)
{
diff --git a/arch/i386/kernel/timers/timer.c b/arch/i386/kernel/timers/timer.c
index a3d6a288088..7e39ed8e33f 100644
--- a/arch/i386/kernel/timers/timer.c
+++ b/arch/i386/kernel/timers/timer.c
@@ -64,3 +64,12 @@ struct timer_opts* __init select_timer(void)
panic("select_timer: Cannot find a suitable timer\n");
return NULL;
}
+
+int read_current_timer(unsigned long *timer_val)
+{
+ if (cur_timer->read_timer) {
+ *timer_val = cur_timer->read_timer();
+ return 0;
+ }
+ return -1;
+}
diff --git a/arch/i386/kernel/timers/timer_hpet.c b/arch/i386/kernel/timers/timer_hpet.c
index f778f471a09..15a7d727bd6 100644
--- a/arch/i386/kernel/timers/timer_hpet.c
+++ b/arch/i386/kernel/timers/timer_hpet.c
@@ -186,6 +186,7 @@ static struct timer_opts timer_hpet = {
.get_offset = get_offset_hpet,
.monotonic_clock = monotonic_clock_hpet,
.delay = delay_hpet,
+ .read_timer = read_timer_tsc,
};
struct init_timer_opts __initdata timer_hpet_init = {
diff --git a/arch/i386/kernel/timers/timer_pm.c b/arch/i386/kernel/timers/timer_pm.c
index d77f22030fe..4ef20e66349 100644
--- a/arch/i386/kernel/timers/timer_pm.c
+++ b/arch/i386/kernel/timers/timer_pm.c
@@ -246,6 +246,7 @@ static struct timer_opts timer_pmtmr = {
.get_offset = get_offset_pmtmr,
.monotonic_clock = monotonic_clock_pmtmr,
.delay = delay_pmtmr,
+ .read_timer = read_timer_tsc,
};
struct init_timer_opts __initdata timer_pmtmr_init = {
diff --git a/arch/i386/kernel/timers/timer_tsc.c b/arch/i386/kernel/timers/timer_tsc.c
index 180444d8782..27f08ae9120 100644
--- a/arch/i386/kernel/timers/timer_tsc.c
+++ b/arch/i386/kernel/timers/timer_tsc.c
@@ -572,6 +572,7 @@ static struct timer_opts timer_tsc = {
.get_offset = get_offset_tsc,
.monotonic_clock = monotonic_clock_tsc,
.delay = delay_tsc,
+ .read_timer = read_timer_tsc,
};
struct init_timer_opts __initdata timer_tsc_init = {
diff --git a/arch/x86_64/lib/delay.c b/arch/x86_64/lib/delay.c
index aed61a668a1..33a873a3c22 100644
--- a/arch/x86_64/lib/delay.c
+++ b/arch/x86_64/lib/delay.c
@@ -12,6 +12,7 @@
#include <linux/sched.h>
#include <linux/delay.h>
#include <asm/delay.h>
+#include <asm/msr.h>
#ifdef CONFIG_SMP
#include <asm/smp.h>
@@ -19,6 +20,12 @@
int x86_udelay_tsc = 0; /* Delay via TSC */
+int read_current_timer(unsigned long *timer_value)
+{
+ rdtscll(*timer_value);
+ return 0;
+}
+
void __delay(unsigned long loops)
{
unsigned bclock, now;