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 <asm/8253pit.h>
  10 #include <asm/msr.h>
  11 #include <asm/vsyscall.h>
  12 #include <asm/hpet.h>
  13
  14 #define CLOCK_TICK_RATE PIT_TICK_RATE   /* Underlying HZ */
  15
  16 typedef unsigned long long cycles_t;
  17
  18 static inline cycles_t get_cycles (void)
  19 {
  20         unsigned long long ret;
  21
  22         rdtscll(ret);
  23         return ret;
  24 }
  25
  26 extern unsigned int cpu_khz;
  27
  28 extern int read_current_timer(unsigned long *timer_value);
  29 #define ARCH_HAS_READ_CURRENT_TIMER     1
  30
  31 extern struct vxtime_data vxtime;
  32
  33 #endif