Commit | Line | Data |
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1da177e4 LT |
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 | ||
d54853ef MS |
14 | /* Inline functions for clock register access. */ |
15 | static 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 | ||
27 | static 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 | ||
39 | static inline void set_clock_comparator(__u64 time) | |
40 | { | |
41 | asm volatile("sckc 0(%1)" : : "m" (time), "a" (&time)); | |
42 | } | |
43 | ||
44 | static inline void store_clock_comparator(__u64 *time) | |
45 | { | |
46 | asm volatile("stckc 0(%1)" : "=m" (*time) : "a" (time)); | |
47 | } | |
48 | ||
1da177e4 LT |
49 | #define CLOCK_TICK_RATE 1193180 /* Underlying HZ */ |
50 | ||
51 | typedef unsigned long long cycles_t; | |
52 | ||
1da177e4 LT |
53 | static inline unsigned long long get_clock (void) |
54 | { | |
55 | unsigned long long clk; | |
56 | ||
94c12cc7 MS |
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__ */ | |
1da177e4 LT |
62 | return clk; |
63 | } | |
64 | ||
1b278294 JG |
65 | static 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 | ||
94c12cc7 MS |
77 | static inline cycles_t get_cycles(void) |
78 | { | |
79 | return (cycles_t) get_clock() >> 2; | |
80 | } | |
81 | ||
d54853ef | 82 | int get_sync_clock(unsigned long long *clock); |
2b67fc46 HC |
83 | void init_cpu_timer(void); |
84 | ||
1da177e4 | 85 | #endif |