blob: 98229db243141ba189a0f75927da5a351af7d992 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Martin Schwidefskyd54853e2007-02-05 21:18:19 +010014/* 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#define CLOCK_TICK_RATE 1193180 /* Underlying HZ */
50
51typedef unsigned long long cycles_t;
52
Linus Torvalds1da177e2005-04-16 15:20:36 -070053static inline unsigned long long get_clock (void)
54{
55 unsigned long long clk;
56
Martin Schwidefsky94c12cc2006-09-28 16:56:43 +020057#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__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 return clk;
63}
64
Jan Glauber1b278292007-02-05 21:18:22 +010065static 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
Martin Schwidefsky94c12cc2006-09-28 16:56:43 +020077static inline cycles_t get_cycles(void)
78{
79 return (cycles_t) get_clock() >> 2;
80}
81
Martin Schwidefskyd54853e2007-02-05 21:18:19 +010082int get_sync_clock(unsigned long long *clock);
Heiko Carstens2b67fc42007-02-05 21:16:47 +010083void init_cpu_timer(void);
84
Linus Torvalds1da177e2005-04-16 15:20:36 -070085#endif