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Diffstat (limited to 'include/asm-x86/timex_64.h')
| -rw-r--r-- | include/asm-x86/timex_64.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-x86/timex_64.h b/include/asm-x86/timex_64.h new file mode 100644 index 000000000000..6ed21f44d308 --- /dev/null +++ b/include/asm-x86/timex_64.h @@ -0,0 +1,31 @@ +/* + * linux/include/asm-x86_64/timex.h + * + * x86-64 architecture timex specifications + */ +#ifndef _ASMx8664_TIMEX_H +#define _ASMx8664_TIMEX_H + +#include <asm/8253pit.h> +#include <asm/msr.h> +#include <asm/vsyscall.h> +#include <asm/system.h> +#include <asm/processor.h> +#include <asm/tsc.h> +#include <linux/compiler.h> + +#define CLOCK_TICK_RATE PIT_TICK_RATE /* Underlying HZ */ + +extern int read_current_timer(unsigned long *timer_value); +#define ARCH_HAS_READ_CURRENT_TIMER 1 + +#define USEC_PER_TICK (USEC_PER_SEC / HZ) +#define NSEC_PER_TICK (NSEC_PER_SEC / HZ) +#define FSEC_PER_TICK (FSEC_PER_SEC / HZ) + +#define NS_SCALE 10 /* 2^10, carefully chosen */ +#define US_SCALE 32 /* 2^32, arbitralrily chosen */ + +extern void mark_tsc_unstable(char *msg); +extern void set_cyc2ns_scale(unsigned long khz); +#endif |