* [PATCH] ixp4xx: implement sched_clock()
@ 2009-12-29 15:27 Mikael Pettersson
2010-01-08 17:27 ` Russell King - ARM Linux
2010-01-08 21:07 ` Krzysztof Halasa
0 siblings, 2 replies; 4+ messages in thread
From: Mikael Pettersson @ 2009-12-29 15:27 UTC (permalink / raw)
To: linux-arm-kernel
Add a better sched_clock() to the ixp4xx platform,
implemented via its clocksource support.
This is based on the sched_clock() I implemented for
the IOP platform. Tested on a ds101 ixp420 machine.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
---
arch/arm/mach-ixp4xx/common.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff -rupN linux-2.6.33-rc2/arch/arm/mach-ixp4xx/common.c linux-2.6.33-rc2.arm-ixp4xx-sched_clock/arch/arm/mach-ixp4xx/common.c
--- linux-2.6.33-rc2/arch/arm/mach-ixp4xx/common.c 2009-12-26 15:20:55.000000000 +0100
+++ linux-2.6.33-rc2.arm-ixp4xx-sched_clock/arch/arm/mach-ixp4xx/common.c 2009-12-26 15:39:01.000000000 +0100
@@ -427,6 +427,17 @@ static void __init ixp4xx_clocksource_in
}
/*
+ * sched_clock()
+ */
+unsigned long long sched_clock(void)
+{
+ cycle_t cyc = ixp4xx_get_cycles(NULL);
+ struct clocksource *cs = &clocksource_ixp4xx;
+
+ return clocksource_cyc2ns(cyc, cs->mult, cs->shift);
+}
+
+/*
* clockevents
*/
static int ixp4xx_set_next_event(unsigned long evt,
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ixp4xx: implement sched_clock()
2009-12-29 15:27 [PATCH] ixp4xx: implement sched_clock() Mikael Pettersson
@ 2010-01-08 17:27 ` Russell King - ARM Linux
2010-01-08 21:07 ` Krzysztof Halasa
1 sibling, 0 replies; 4+ messages in thread
From: Russell King - ARM Linux @ 2010-01-08 17:27 UTC (permalink / raw)
To: linux-arm-kernel
On Tue, Dec 29, 2009 at 04:27:12PM +0100, Mikael Pettersson wrote:
> Add a better sched_clock() to the ixp4xx platform,
> implemented via its clocksource support.
>
> This is based on the sched_clock() I implemented for
> the IOP platform. Tested on a ds101 ixp420 machine.
Great, patch system please? Thanks.
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ixp4xx: implement sched_clock()
2009-12-29 15:27 [PATCH] ixp4xx: implement sched_clock() Mikael Pettersson
2010-01-08 17:27 ` Russell King - ARM Linux
@ 2010-01-08 21:07 ` Krzysztof Halasa
2010-01-09 11:30 ` Mikael Pettersson
1 sibling, 1 reply; 4+ messages in thread
From: Krzysztof Halasa @ 2010-01-08 21:07 UTC (permalink / raw)
To: linux-arm-kernel
Mikael Pettersson <mikpe@it.uu.se> writes:
> Add a better sched_clock() to the ixp4xx platform,
> implemented via its clocksource support.
>
> This is based on the sched_clock() I implemented for
> the IOP platform. Tested on a ds101 ixp420 machine.
Good to see the confirmation, I know next to nothing about the
clocksource matter. I can pick this up if you wish, of course,
or you can send it through Russell.
--
Krzysztof Halasa
^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH] ixp4xx: implement sched_clock()
2010-01-08 21:07 ` Krzysztof Halasa
@ 2010-01-09 11:30 ` Mikael Pettersson
0 siblings, 0 replies; 4+ messages in thread
From: Mikael Pettersson @ 2010-01-09 11:30 UTC (permalink / raw)
To: linux-arm-kernel
Krzysztof Halasa writes:
> Mikael Pettersson <mikpe@it.uu.se> writes:
>
> > Add a better sched_clock() to the ixp4xx platform,
> > implemented via its clocksource support.
> >
> > This is based on the sched_clock() I implemented for
> > the IOP platform. Tested on a ds101 ixp420 machine.
>
> Good to see the confirmation, I know next to nothing about the
> clocksource matter. I can pick this up if you wish, of course,
> or you can send it through Russell.
I'll send it to the patch system later today.
/Mikael
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2010-01-09 11:30 UTC | newest]
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2009-12-29 15:27 [PATCH] ixp4xx: implement sched_clock() Mikael Pettersson
2010-01-08 17:27 ` Russell King - ARM Linux
2010-01-08 21:07 ` Krzysztof Halasa
2010-01-09 11:30 ` Mikael Pettersson
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