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/* Inline functions for clock register access. */
15static inline int set_clock(__u64 time)
16{
17	int cc;
18
19	asm volatile(
20		"   sck   0(%2)\n"
21		"   ipm   %0\n"
22		"   srl   %0,28\n"
23		: "=d" (cc) : "m" (time), "a" (&time) : "cc");
24	return cc;
25}
26
27static inline int store_clock(__u64 *time)
28{
29	int cc;
30
31	asm volatile(
32		"   stck  0(%2)\n"
33		"   ipm   %0\n"
34		"   srl   %0,28\n"
35		: "=d" (cc), "=m" (*time) : "a" (time) : "cc");
36	return cc;
37}
38
39static inline void set_clock_comparator(__u64 time)
40{
41	asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time));
42}
43
44static inline void store_clock_comparator(__u64 *time)
45{
46	asm volatile("stckc 0(%1)" : "=m" (*time) : "a" (time));
47}
48
49#define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
50
51typedef unsigned long long cycles_t;
52
53static inline unsigned long long get_clock (void)
54{
55	unsigned long long clk;
56
57#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
58	asm volatile("stck %0" : "=Q" (clk) : : "cc");
59#else /* __GNUC__ */
60	asm volatile("stck 0(%1)" : "=m" (clk) : "a" (&clk) : "cc");
61#endif /* __GNUC__ */
62	return clk;
63}
64
65static inline void get_clock_extended(void *dest)
66{
67	typedef struct { unsigned long long clk[2]; } __clock_t;
68
69#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
70	asm volatile("stcke %0" : "=Q" (*((__clock_t *)dest)) : : "cc");
71#else /* __GNUC__ */
72	asm volatile("stcke 0(%1)" : "=m" (*((__clock_t *)dest))
73				   : "a" ((__clock_t *)dest) : "cc");
74#endif /* __GNUC__ */
75}
76
77static inline cycles_t get_cycles(void)
78{
79	return (cycles_t) get_clock() >> 2;
80}
81
82int get_sync_clock(unsigned long long *clock);
83void init_cpu_timer(void);
84
85#endif
86