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
19 #include <linux/math64.h>
20
21 typedef u64 __nocast cputime_t;
22 typedef u64 __nocast cputime64_t;
23
24 #define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
25
26 #define cputime_one_jiffy jiffies_to_cputime(1)
27
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
32 /*
33 * Convert cputime <-> jiffies (HZ)
34 */
35 #define cputime_to_jiffies(__ct) \
36 cputime_div(__ct, NSEC_PER_SEC / HZ)
37 #define cputime_to_scaled(__ct) (__ct)
38 #define jiffies_to_cputime(__jif) \
39 (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
40 #define cputime64_to_jiffies64(__ct) \
41 cputime_div(__ct, NSEC_PER_SEC / HZ)
42 #define jiffies64_to_cputime64(__jif) \
43 (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
44
45
46 /*
47 * Convert cputime <-> nanoseconds
48 */
49 #define cputime_to_nsecs(__ct) \
50 (__force u64)(__ct)
51 #define nsecs_to_cputime(__nsecs) \
52 (__force cputime_t)(__nsecs)
53
54
55 /*
56 * Convert cputime <-> microseconds
57 */
58 #define cputime_to_usecs(__ct) \
59 cputime_div(__ct, NSEC_PER_USEC)
60 #define usecs_to_cputime(__usecs) \
61 (__force cputime_t)((__usecs) * NSEC_PER_USEC)
62 #define usecs_to_cputime64(__usecs) \
63 (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
64
65 /*
66 * Convert cputime <-> seconds
67 */
68 #define cputime_to_secs(__ct) \
69 cputime_div(__ct, NSEC_PER_SEC)
70 #define secs_to_cputime(__secs) \
71 (__force cputime_t)((__secs) * NSEC_PER_SEC)
72
73 /*
74 * Convert cputime <-> timespec (nsec)
75 */
timespec_to_cputime(const struct timespec * val)76 static inline cputime_t timespec_to_cputime(const struct timespec *val)
77 {
78 u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
79 return (__force cputime_t) ret;
80 }
cputime_to_timespec(const cputime_t ct,struct timespec * val)81 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
82 {
83 u32 rem;
84
85 val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
86 val->tv_nsec = rem;
87 }
88
89 /*
90 * Convert cputime <-> timeval (msec)
91 */
timeval_to_cputime(const struct timeval * val)92 static inline cputime_t timeval_to_cputime(const struct timeval *val)
93 {
94 u64 ret = (u64)val->tv_sec * NSEC_PER_SEC +
95 val->tv_usec * NSEC_PER_USEC;
96 return (__force cputime_t) ret;
97 }
cputime_to_timeval(const cputime_t ct,struct timeval * val)98 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
99 {
100 u32 rem;
101
102 val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
103 val->tv_usec = rem / NSEC_PER_USEC;
104 }
105
106 /*
107 * Convert cputime <-> clock (USER_HZ)
108 */
109 #define cputime_to_clock_t(__ct) \
110 cputime_div(__ct, (NSEC_PER_SEC / USER_HZ))
111 #define clock_t_to_cputime(__x) \
112 (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
113
114 /*
115 * Convert cputime64 to clock.
116 */
117 #define cputime64_to_clock_t(__ct) \
118 cputime_to_clock_t((__force cputime_t)__ct)
119
120 #endif
121