From c6a3c851a287980e47b45bf191a3b78d9d8508e2 Mon Sep 17 00:00:00 2001 From: David Daney Date: Wed, 23 Dec 2009 13:18:54 -0800 Subject: MIPS: Octeon: Add sched_clock() to csrc-octeon.c With the advent of function graph tracing on MIPS, Octeon needs a high precision sched_clock() implementation. Without it, most timing numbers are reported as 0.000. This new sched_clock just uses the 64-bit cycle counter appropriately scaled. Signed-off-by: David Daney Patchwork: http://patchwork.linux-mips.org/patch/805/ Signed-off-by: Ralf Baechle --- arch/mips/cavium-octeon/csrc-octeon.c | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'arch') diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c index 96110f217dcd..96df821fbd81 100644 --- a/arch/mips/cavium-octeon/csrc-octeon.c +++ b/arch/mips/cavium-octeon/csrc-octeon.c @@ -50,6 +50,13 @@ static struct clocksource clocksource_mips = { .flags = CLOCK_SOURCE_IS_CONTINUOUS, }; +unsigned long long notrace sched_clock(void) +{ + return clocksource_cyc2ns(read_c0_cvmcount(), + clocksource_mips.mult, + clocksource_mips.shift); +} + void __init plat_time_init(void) { clocksource_mips.rating = 300; -- cgit v1.2.3