timex.h
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上传日期:2013-02-24
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- /*
- * include/asm-s390/timex.h
- *
- * S390 version
- * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
- *
- * Derived from "include/asm-i386/timex.h"
- * Copyright (C) 1992, Linus Torvalds
- */
- #ifndef _ASM_S390_TIMEX_H
- #define _ASM_S390_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 long cycles_t;
- extern cycles_t cacheflush_time;
- static inline cycles_t get_cycles(void)
- {
- cycles_t cycles;
- __asm__("stck %0" : "=m" (cycles) : : "cc");
- return cycles >> 2;
- }
- #endif