/* * 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