diff options
| author | Rabin Vincent <rabin@rab.in> | 2015-03-09 18:51:31 +0100 |
|---|---|---|
| committer | Jesper Nilsson <jespern@axis.com> | 2015-03-25 11:03:41 +0100 |
| commit | d3dad475b2839b9964ef54211e135eb6fb9952f9 (patch) | |
| tree | fcb7df761ed78f5899df8a74dd1726c0fdb43030 /arch | |
| parent | CRISv32: use MMIO clocksource (diff) | |
| download | linux-d3dad475b2839b9964ef54211e135eb6fb9952f9.tar.xz linux-d3dad475b2839b9964ef54211e135eb6fb9952f9.zip | |
CRISv32: use GENERIC_SCHED_CLOCK
Provide a fast sched clock using the free-running timer and the generic
sched_clock infrastructure.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Signed-off-by: Jesper Nilsson <jespern@axis.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/cris/Kconfig | 1 | ||||
| -rw-r--r-- | arch/cris/arch-v32/kernel/time.c | 9 | ||||
| -rw-r--r-- | arch/cris/kernel/time.c | 2 |
3 files changed, 12 insertions, 0 deletions
diff --git a/arch/cris/Kconfig b/arch/cris/Kconfig index bd920ccbef6f..0314e325a669 100644 --- a/arch/cris/Kconfig +++ b/arch/cris/Kconfig @@ -57,6 +57,7 @@ config CRIS select OF_EARLY_FLATTREE if ETRAX_ARCH_V32 select CLKSRC_MMIO if ETRAX_ARCH_V32 select GENERIC_CLOCKEVENTS if ETRAX_ARCH_V32 + select GENERIC_SCHED_CLOCK if ETRAX_ARCH_V32 config HZ int diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c index 7c802121c0c3..4fce9f1f7cc0 100644 --- a/arch/cris/arch-v32/kernel/time.c +++ b/arch/cris/arch-v32/kernel/time.c @@ -15,6 +15,7 @@ #include <linux/init.h> #include <linux/threads.h> #include <linux/cpufreq.h> +#include <linux/sched_clock.h> #include <linux/mm.h> #include <asm/types.h> #include <asm/signal.h> @@ -242,6 +243,11 @@ static struct irqaction irq_timer = { .dev_id = &crisv32_clockevent, }; +static u64 notrace crisv32_timer_sched_clock(void) +{ + return REG_RD(timer, timer_base, r_time); +} + static void __init crisv32_timer_init(void) { reg_timer_rw_intr_mask timer_intr_mask; @@ -275,6 +281,9 @@ void __init time_init(void) crisv32_timer_init(); + sched_clock_register(crisv32_timer_sched_clock, 32, + CRISV32_TIMER_FREQ); + clocksource_mmio_init(timer_base + REG_RD_ADDR_timer_r_time, "crisv32-timer", CRISV32_TIMER_FREQ, 300, 32, clocksource_mmio_readl_up); diff --git a/arch/cris/kernel/time.c b/arch/cris/kernel/time.c index fe6acdabbc8d..7780d379522f 100644 --- a/arch/cris/kernel/time.c +++ b/arch/cris/kernel/time.c @@ -79,11 +79,13 @@ cris_do_profile(struct pt_regs* regs) #endif } +#ifndef CONFIG_GENERIC_SCHED_CLOCK unsigned long long sched_clock(void) { return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ) + get_ns_in_jiffie(); } +#endif static int __init init_udelay(void) |