2 * Definitions for measuring cputime in nsecs resolution.
4 * Based on <arch/ia64/include/asm/cputime.h>
6 * Copyright (C) 2007 FUJITSU LIMITED
7 * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
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.
16 #ifndef _ASM_GENERIC_CPUTIME_NSECS_H
17 #define _ASM_GENERIC_CPUTIME_NSECS_H
19 typedef u64 __nocast cputime_t
;
20 typedef u64 __nocast cputime64_t
;
22 #define cputime_one_jiffy jiffies_to_cputime(1)
25 * Convert cputime <-> jiffies (HZ)
27 #define cputime_to_jiffies(__ct) \
28 ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
29 #define cputime_to_scaled(__ct) (__ct)
30 #define jiffies_to_cputime(__jif) \
31 (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
32 #define cputime64_to_jiffies64(__ct) \
33 ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
34 #define jiffies64_to_cputime64(__jif) \
35 (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
39 * Convert cputime <-> nanoseconds
41 #define nsecs_to_cputime(__nsecs) ((__force u64)(__nsecs))
45 * Convert cputime <-> microseconds
47 #define cputime_to_usecs(__ct) \
48 ((__force u64)(__ct) / NSEC_PER_USEC)
49 #define usecs_to_cputime(__usecs) \
50 (__force cputime_t)((__usecs) * NSEC_PER_USEC)
51 #define usecs_to_cputime64(__usecs) \
52 (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
55 * Convert cputime <-> seconds
57 #define cputime_to_secs(__ct) \
58 ((__force u64)(__ct) / NSEC_PER_SEC)
59 #define secs_to_cputime(__secs) \
60 (__force cputime_t)((__secs) * NSEC_PER_SEC)
63 * Convert cputime <-> timespec (nsec)
65 static inline cputime_t
timespec_to_cputime(const struct timespec
*val
)
67 u64 ret
= val
->tv_sec
* NSEC_PER_SEC
+ val
->tv_nsec
;
68 return (__force cputime_t
) ret
;
70 static inline void cputime_to_timespec(const cputime_t ct
, struct timespec
*val
)
72 val
->tv_sec
= (__force u64
) ct
/ NSEC_PER_SEC
;
73 val
->tv_nsec
= (__force u64
) ct
% NSEC_PER_SEC
;
77 * Convert cputime <-> timeval (msec)
79 static inline cputime_t
timeval_to_cputime(const struct timeval
*val
)
81 u64 ret
= val
->tv_sec
* NSEC_PER_SEC
+ val
->tv_usec
* NSEC_PER_USEC
;
82 return (__force cputime_t
) ret
;
84 static inline void cputime_to_timeval(const cputime_t ct
, struct timeval
*val
)
86 val
->tv_sec
= (__force u64
) ct
/ NSEC_PER_SEC
;
87 val
->tv_usec
= ((__force u64
) ct
% NSEC_PER_SEC
) / NSEC_PER_USEC
;
91 * Convert cputime <-> clock (USER_HZ)
93 #define cputime_to_clock_t(__ct) \
94 ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ))
95 #define clock_t_to_cputime(__x) \
96 (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
99 * Convert cputime64 to clock.
101 #define cputime64_to_clock_t(__ct) \
102 cputime_to_clock_t((__force cputime_t)__ct)
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