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39613766 FW |
1 | /* |
2 | * Definitions for measuring cputime in nsecs resolution. | |
3 | * | |
4 | * Based on <arch/ia64/include/asm/cputime.h> | |
5 | * | |
6 | * Copyright (C) 2007 FUJITSU LIMITED | |
7 | * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU General Public License | |
11 | * as published by the Free Software Foundation; either version | |
12 | * 2 of the License, or (at your option) any later version. | |
13 | * | |
14 | */ | |
15 | ||
16 | #ifndef _ASM_GENERIC_CPUTIME_NSECS_H | |
17 | #define _ASM_GENERIC_CPUTIME_NSECS_H | |
18 | ||
8c23b80e KH |
19 | #include <linux/math64.h> |
20 | ||
39613766 FW |
21 | typedef u64 __nocast cputime_t; |
22 | typedef u64 __nocast cputime64_t; | |
23 | ||
347abad9 RR |
24 | #define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new) |
25 | ||
39613766 FW |
26 | #define cputime_one_jiffy jiffies_to_cputime(1) |
27 | ||
8c23b80e KH |
28 | #define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor) |
29 | #define cputime_div_rem(__ct, divisor, remainder) \ | |
30 | div_u64_rem((__force u64)__ct, divisor, remainder); | |
31 | ||
39613766 FW |
32 | /* |
33 | * Convert cputime <-> jiffies (HZ) | |
34 | */ | |
35 | #define cputime_to_jiffies(__ct) \ | |
8c23b80e | 36 | cputime_div(__ct, NSEC_PER_SEC / HZ) |
abf917cd | 37 | #define cputime_to_scaled(__ct) (__ct) |
39613766 FW |
38 | #define jiffies_to_cputime(__jif) \ |
39 | (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ)) | |
40 | #define cputime64_to_jiffies64(__ct) \ | |
8c23b80e | 41 | cputime_div(__ct, NSEC_PER_SEC / HZ) |
39613766 FW |
42 | #define jiffies64_to_cputime64(__jif) \ |
43 | (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ)) | |
44 | ||
abf917cd FW |
45 | |
46 | /* | |
47 | * Convert cputime <-> nanoseconds | |
48 | */ | |
d8a9ce3f FW |
49 | #define cputime_to_nsecs(__ct) \ |
50 | (__force u64)(__ct) | |
69bb2600 FW |
51 | #define nsecs_to_cputime(__nsecs) \ |
52 | (__force cputime_t)(__nsecs) | |
57430218 RR |
53 | #define nsecs_to_cputime64(__nsecs) \ |
54 | (__force cputime64_t)(__nsecs) | |
abf917cd FW |
55 | |
56 | ||
39613766 FW |
57 | /* |
58 | * Convert cputime <-> microseconds | |
59 | */ | |
60 | #define cputime_to_usecs(__ct) \ | |
8c23b80e | 61 | cputime_div(__ct, NSEC_PER_USEC) |
39613766 FW |
62 | #define usecs_to_cputime(__usecs) \ |
63 | (__force cputime_t)((__usecs) * NSEC_PER_USEC) | |
64 | #define usecs_to_cputime64(__usecs) \ | |
65 | (__force cputime64_t)((__usecs) * NSEC_PER_USEC) | |
66 | ||
67 | /* | |
68 | * Convert cputime <-> seconds | |
69 | */ | |
70 | #define cputime_to_secs(__ct) \ | |
8c23b80e | 71 | cputime_div(__ct, NSEC_PER_SEC) |
39613766 FW |
72 | #define secs_to_cputime(__secs) \ |
73 | (__force cputime_t)((__secs) * NSEC_PER_SEC) | |
74 | ||
75 | /* | |
76 | * Convert cputime <-> timespec (nsec) | |
77 | */ | |
78 | static inline cputime_t timespec_to_cputime(const struct timespec *val) | |
79 | { | |
0f26922f | 80 | u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + val->tv_nsec; |
39613766 FW |
81 | return (__force cputime_t) ret; |
82 | } | |
83 | static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) | |
84 | { | |
8c23b80e KH |
85 | u32 rem; |
86 | ||
87 | val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); | |
88 | val->tv_nsec = rem; | |
39613766 FW |
89 | } |
90 | ||
91 | /* | |
92 | * Convert cputime <-> timeval (msec) | |
93 | */ | |
c78a4bcd | 94 | static inline cputime_t timeval_to_cputime(const struct timeval *val) |
39613766 | 95 | { |
0f26922f | 96 | u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + |
97 | val->tv_usec * NSEC_PER_USEC; | |
39613766 FW |
98 | return (__force cputime_t) ret; |
99 | } | |
100 | static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) | |
101 | { | |
8c23b80e KH |
102 | u32 rem; |
103 | ||
104 | val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); | |
105 | val->tv_usec = rem / NSEC_PER_USEC; | |
39613766 FW |
106 | } |
107 | ||
108 | /* | |
109 | * Convert cputime <-> clock (USER_HZ) | |
110 | */ | |
111 | #define cputime_to_clock_t(__ct) \ | |
8c23b80e | 112 | cputime_div(__ct, (NSEC_PER_SEC / USER_HZ)) |
39613766 FW |
113 | #define clock_t_to_cputime(__x) \ |
114 | (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ)) | |
115 | ||
116 | /* | |
117 | * Convert cputime64 to clock. | |
118 | */ | |
119 | #define cputime64_to_clock_t(__ct) \ | |
120 | cputime_to_clock_t((__force cputime_t)__ct) | |
121 | ||
122 | #endif |