diff options
Diffstat (limited to 'arch/parisc/kernel/time.c')
| -rw-r--r-- | arch/parisc/kernel/time.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index c17e2249115f..71c9d5426995 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -16,6 +16,7 @@ #include <linux/rtc.h> #include <linux/platform_device.h> #include <asm/processor.h> +#include <asm/pdcpat.h> static u64 cr16_clock_freq; static unsigned long clocktick; @@ -99,6 +100,22 @@ void parisc_clockevent_init(void) clockevents_config_and_register(cd, cr16_clock_freq, min_delta, max_delta); } +static void parisc_find_64bit_counter(void) +{ +#ifdef CONFIG_64BIT + uint64_t *pclock; + unsigned long freq, unique; + int ret; + + ret = pdc_pat_pd_get_platform_counter(&pclock, &freq, &unique); + if (ret == PDC_OK) + pr_info("64-bit counter found at %px, freq: %lu, unique: %lu\n", + pclock, freq, unique); + else + pr_info("64-bit counter not found.\n"); +#endif +} + unsigned long notrace profile_pc(struct pt_regs *regs) { unsigned long pc = instruction_pointer(regs); @@ -193,12 +210,9 @@ static struct clocksource clocksource_cr16 = { .read = read_cr16, .mask = CLOCKSOURCE_MASK(BITS_PER_LONG), .flags = CLOCK_SOURCE_IS_CONTINUOUS | - CLOCK_SOURCE_VALID_FOR_HRES | - CLOCK_SOURCE_MUST_VERIFY | - CLOCK_SOURCE_VERIFY_PERCPU, + CLOCK_SOURCE_VALID_FOR_HRES, }; - /* * timer interrupt and sched_clock() initialization */ @@ -213,6 +227,9 @@ void __init time_init(void) parisc_clockevent_init(); + /* check for free-running 64-bit platform counter */ + parisc_find_64bit_counter(); + /* register at clocksource framework */ clocksource_register_hz(&clocksource_cr16, cr16_clock_freq); } |