include/asm-x86_64/timex.h

   1 /*
   2  * linux/include/asm-x86_64/timex.h
   3  *
   4  * x86-64 architecture timex specifications
   5  */
   6 #ifndef _ASMx8664_TIMEX_H
   7 #define _ASMx8664_TIMEX_H
   8
   9 #include <linux/config.h>
  10 #include <asm/8253pit.h>
  11 #include <asm/msr.h>
  12 #include <asm/vsyscall.h>
  13 #include <asm/hpet.h>
  14
  15 #define CLOCK_TICK_RATE PIT_TICK_RATE   /* Underlying HZ */
  16
  17 typedef unsigned long long cycles_t;
  18
  19 static inline cycles_t get_cycles (void)
  20 {
  21         unsigned long long ret;
  22
  23         rdtscll(ret);
  24         return ret;
  25 }
  26
  27 extern unsigned int cpu_khz;
  28
  29 extern int read_current_timer(unsigned long *timer_value);
  30 #define ARCH_HAS_READ_CURRENT_TIMER     1
  31
  32 extern struct vxtime_data vxtime;
  33
  34 #endif