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timex.h
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 1k
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Linux-Unix program

Development Platform:

Unix_Linux

timex.h：Code Content
  1. /*
  2.  * BK Id: SCCS/s.timex.h 1.8 08/15/01 22:43:07 paulus
  3.  */
  4. /*
  5.  * linux/include/asm-ppc/timex.h
  6.  *
  7.  * ppc architecture timex specifications
  8.  */
  9. #ifdef __KERNEL__
  10. #ifndef _ASMppc_TIMEX_H
  11. #define _ASMppc_TIMEX_H
  13. #include <linux/config.h>
  14. #include <asm/cputable.h>
  16. #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
  17. #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */
  18. #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * 
  19. (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) 
  20. << (SHIFT_SCALE-SHIFT_HZ)) / HZ)
  22. typedef unsigned long cycles_t;
  24. /*
  25.  * For the "cycle" counter we use the timebase lower half.
  26.  * Currently only used on SMP.
  27.  */
  29. extern cycles_t cacheflush_time;
  31. static inline cycles_t get_cycles(void)
  32. {
  33. cycles_t ret = 0;
  35. __asm__ __volatile__(
  36. "98: mftb %0n"
  37. "99:n"
  38. ".section __ftr_fixup,"a"n"
  39. " .long %1n"
  40. " .long 0n"
  41. " .long 98bn"
  42. " .long 99bn"
  43. ".previous"
  44. : "=r" (ret) : "i" (CPU_FTR_601));
  45. return ret;
  46. }
  48. #endif
  50. #define vxtime_lock() do {} while (0)
  51. #define vxtime_unlock() do {} while (0)
  53. #endif /* __KERNEL__ */