timex.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * linux/include/asm-ppc/timex.h
- *
- * PPC64 architecture timex specifications
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _ASMPPC64_TIMEX_H
- #define _ASMPPC64_TIMEX_H
- #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
- #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */
- #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) *
- (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR))
- << (SHIFT_SCALE-SHIFT_HZ)) / HZ)
- typedef unsigned long cycles_t;
- extern cycles_t cacheflush_time;
- static inline cycles_t get_cycles(void)
- {
- cycles_t ret;
- __asm__ __volatile__("mftb %0" : "=r" (ret) : );
- return ret;
- }
- #define vxtime_lock() do {} while (0)
- #define vxtime_unlock() do {} while (0)
- #endif