timex.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:1k
- /*
- * linux/include/asm-alpha/timex.h
- *
- * ALPHA architecture timex specifications
- */
- #ifndef _ASMALPHA_TIMEX_H
- #define _ASMALPHA_TIMEX_H
- #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
- /*
- * Standard way to access the cycle counter.
- * Currently only used on SMP for scheduling.
- *
- * Only the low 32 bits are available as a continuously counting entity.
- * But this only means we'll force a reschedule every 8 seconds or so,
- * which isn't an evil thing.
- */
- typedef unsigned int cycles_t;
- extern cycles_t cacheflush_time;
- static inline cycles_t get_cycles (void)
- {
- cycles_t ret;
- __asm__ __volatile__ ("rpcc %0" : "=r"(ret));
- return ret;
- }
- #endif