2 * linux/include/asm-x86_64/timex.h
4 * x86-64 architecture timex specifications
6 #ifndef _ASMx8664_TIMEX_H
7 #define _ASMx8664_TIMEX_H
9 #include <linux/config.h>
11 #include <asm/vsyscall.h>
14 #define CLOCK_TICK_RATE 1193182 /* Underlying HZ */
15 #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */
16 #define FINETUNE ((((((int)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
17 (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \
18 << (SHIFT_SCALE-SHIFT_HZ)) / HZ)
20 typedef unsigned long long cycles_t;
22 extern cycles_t cacheflush_time;
24 static inline cycles_t get_cycles (void)
26 unsigned long long ret;
32 extern unsigned int cpu_khz;
34 extern struct vxtime_data vxtime;