include/asm-alpha/timex.h

   1 /*
   2  * linux/include/asm-alpha/timex.h
   3  *
   4  * ALPHA architecture timex specifications
   5  */
   6 #ifndef _ASMALPHA_TIMEX_H
   7 #define _ASMALPHA_TIMEX_H
   8
   9 #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
  10
  11 /*
  12  * Standard way to access the cycle counter.
  13  * Currently only used on SMP for scheduling.
  14  *
  15  * Only the low 32 bits are available as a continuously counting entity.
  16  * But this only means we'll force a reschedule every 8 seconds or so,
  17  * which isn't an evil thing.
  18  */
  19
  20 typedef unsigned int cycles_t;
  21 extern cycles_t cacheflush_time;
  22
  23 static inline cycles_t get_cycles (void)
  24 {
  25         cycles_t ret;
  26         __asm__ __volatile__ ("rpcc %0" : "=r"(ret));
  27         return ret;
  28 }
  29
  30 #endif