2 * include/asm-s390/timex.h
5 * Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
7 * Derived from "include/asm-i386/timex.h"
8 * Copyright (C) 1992, Linus Torvalds
11 #ifndef _ASM_S390_TIMEX_H
12 #define _ASM_S390_TIMEX_H
14 #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
15 #define CLOCK_TICK_FACTOR 20 /* Factor of both 1000000 and CLOCK_TICK_RATE */
16 #define FINETUNE ((((((long)LATCH * HZ - CLOCK_TICK_RATE) << SHIFT_HZ) * \
17 (1000000/CLOCK_TICK_FACTOR) / (CLOCK_TICK_RATE/CLOCK_TICK_FACTOR)) \
18 << (SHIFT_SCALE-SHIFT_HZ)) / HZ)
20 typedef unsigned long long cycles_t;
22 extern cycles_t cacheflush_time;
24 static inline cycles_t get_cycles(void)
28 __asm__("stck 0(%1)" : "=m" (cycles) : "a" (&cycles) : "cc");
32 static inline unsigned long long get_clock (void)
34 unsigned long long clk;
36 __asm__("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");