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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 | ||
24 | #define cputime_one_jiffy jiffies_to_cputime(1) | |
25 | ||
8c23b80e KH |
26 | #define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor) |
27 | #define cputime_div_rem(__ct, divisor, remainder) \ | |
28 | div_u64_rem((__force u64)__ct, divisor, remainder); | |
29 | ||
39613766 FW |
30 | /* |
31 | * Convert cputime <-> jiffies (HZ) | |
32 | */ | |
33 | #define cputime_to_jiffies(__ct) \ | |
8c23b80e | 34 | cputime_div(__ct, NSEC_PER_SEC / HZ) |
abf917cd | 35 | #define cputime_to_scaled(__ct) (__ct) |
39613766 FW |
36 | #define jiffies_to_cputime(__jif) \ |
37 | (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ)) | |
38 | #define cputime64_to_jiffies64(__ct) \ | |
8c23b80e | 39 | cputime_div(__ct, NSEC_PER_SEC / HZ) |
39613766 FW |
40 | #define jiffies64_to_cputime64(__jif) \ |
41 | (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ)) | |
42 | ||
abf917cd FW |
43 | |
44 | /* | |
45 | * Convert cputime <-> nanoseconds | |
46 | */ | |
47 | #define nsecs_to_cputime(__nsecs) ((__force u64)(__nsecs)) | |
48 | ||
49 | ||
39613766 FW |
50 | /* |
51 | * Convert cputime <-> microseconds | |
52 | */ | |
53 | #define cputime_to_usecs(__ct) \ | |
8c23b80e | 54 | cputime_div(__ct, NSEC_PER_USEC) |
39613766 FW |
55 | #define usecs_to_cputime(__usecs) \ |
56 | (__force cputime_t)((__usecs) * NSEC_PER_USEC) | |
57 | #define usecs_to_cputime64(__usecs) \ | |
58 | (__force cputime64_t)((__usecs) * NSEC_PER_USEC) | |
59 | ||
60 | /* | |
61 | * Convert cputime <-> seconds | |
62 | */ | |
63 | #define cputime_to_secs(__ct) \ | |
8c23b80e | 64 | cputime_div(__ct, NSEC_PER_SEC) |
39613766 FW |
65 | #define secs_to_cputime(__secs) \ |
66 | (__force cputime_t)((__secs) * NSEC_PER_SEC) | |
67 | ||
68 | /* | |
69 | * Convert cputime <-> timespec (nsec) | |
70 | */ | |
71 | static inline cputime_t timespec_to_cputime(const struct timespec *val) | |
72 | { | |
73 | u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec; | |
74 | return (__force cputime_t) ret; | |
75 | } | |
76 | static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val) | |
77 | { | |
8c23b80e KH |
78 | u32 rem; |
79 | ||
80 | val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); | |
81 | val->tv_nsec = rem; | |
39613766 FW |
82 | } |
83 | ||
84 | /* | |
85 | * Convert cputime <-> timeval (msec) | |
86 | */ | |
c78a4bcd | 87 | static inline cputime_t timeval_to_cputime(const struct timeval *val) |
39613766 FW |
88 | { |
89 | u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC; | |
90 | return (__force cputime_t) ret; | |
91 | } | |
92 | static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val) | |
93 | { | |
8c23b80e KH |
94 | u32 rem; |
95 | ||
96 | val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem); | |
97 | val->tv_usec = rem / NSEC_PER_USEC; | |
39613766 FW |
98 | } |
99 | ||
100 | /* | |
101 | * Convert cputime <-> clock (USER_HZ) | |
102 | */ | |
103 | #define cputime_to_clock_t(__ct) \ | |
8c23b80e | 104 | cputime_div(__ct, (NSEC_PER_SEC / USER_HZ)) |
39613766 FW |
105 | #define clock_t_to_cputime(__x) \ |
106 | (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ)) | |
107 | ||
108 | /* | |
109 | * Convert cputime64 to clock. | |
110 | */ | |
111 | #define cputime64_to_clock_t(__ct) \ | |
112 | cputime_to_clock_t((__force cputime_t)__ct) | |
113 | ||
114 | #endif |