release/src-rt-6.x.4708/linux/linux-2.6.36/arch/blackfin/include/asm/timex.h

   1 /*
   2  * asm-blackfin/timex.h: cpu cycles!
   3  *
   4  * Copyright 2004-2008 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8
   9 #ifndef _ASM_BLACKFIN_TIMEX_H
  10 #define _ASM_BLACKFIN_TIMEX_H
  11
  12 #define CLOCK_TICK_RATE 1000000 /* Underlying HZ */
  13
  14 typedef unsigned long long cycles_t;
  15
  16 static inline cycles_t get_cycles(void)
  17 {
  18         unsigned long tmp, tmp2;
  19         __asm__ __volatile__("%0 = cycles; %1 = cycles2;" : "=d"(tmp), "=d"(tmp2));
  20         return tmp | ((cycles_t)tmp2 << 32);
  21 }
  22
  23 #endif