Commit 62c544bc authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Detect 64-bit free running platform counter 



Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent e3217ddf

arch/parisc/kernel/time.c

+20 −0
Original line number Diff line number Diff line
@@ -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);
@@ -213,6 +230,9 @@ 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);

}