1/*
2 *  include/asm-s390/timex.h
3 *
4 *  S390 version
5 *    Copyright (C) 1999 IBM Deutschland Entwicklung GmbH, IBM Corporation
6 *
7 *  Derived from "include/asm-i386/timex.h"
8 *    Copyright (C) 1992, Linus Torvalds
9 */
10
11#ifndef _ASM_S390_TIMEX_H
12#define _ASM_S390_TIMEX_H
13
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)
19
20typedef unsigned long long cycles_t;
21
22extern cycles_t cacheflush_time;
23
24static inline cycles_t get_cycles(void)
25{
26	cycles_t cycles;
27
28	__asm__("stck 0(%0)" : : "a" (&(cycles)) : "memory", "cc");
29	return cycles >> 2;
30}
31
32static inline unsigned long long get_clock (void)
33{
34	unsigned long long clk;
35
36	__asm__("stck 0(%0)" : : "a" (&(clk)) : "memory", "cc");
37	return clk;
38}
39
40#define vxtime_lock()		do {} while (0)
41#define vxtime_unlock()		do {} while (0)
42
43#endif
44