include/asm-generic/cputime_nsecs.h

   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 typedef u64 __nocast cputime_t;
  20 typedef u64 __nocast cputime64_t;
  21
  22 #define cputime_one_jiffy               jiffies_to_cputime(1)
  23
  24 /*
  25  * Convert cputime <-> jiffies (HZ)
  26  */
  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))
  36
  37
  38 /*
  39  * Convert cputime <-> nanoseconds
  40  */
  41 #define nsecs_to_cputime(__nsecs)       ((__force u64)(__nsecs))
  42
  43
  44 /*
  45  * Convert cputime <-> microseconds
  46  */
  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)
  53
  54 /*
  55  * Convert cputime <-> seconds
  56  */
  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)
  61
  62 /*
  63  * Convert cputime <-> timespec (nsec)
  64  */
  65 static inline cputime_t timespec_to_cputime(const struct timespec *val)
  66 {
  67         u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
  68         return (__force cputime_t) ret;
  69 }
  70 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
  71 {
  72         val->tv_sec  = (__force u64) ct / NSEC_PER_SEC;
  73         val->tv_nsec = (__force u64) ct % NSEC_PER_SEC;
  74 }
  75
  76 /*
  77  * Convert cputime <-> timeval (msec)
  78  */
  79 static inline cputime_t timeval_to_cputime(const struct timeval *val)
  80 {
  81         u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
  82         return (__force cputime_t) ret;
  83 }
  84 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
  85 {
  86         val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
  87         val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC;
  88 }
  89
  90 /*
  91  * Convert cputime <-> clock (USER_HZ)
  92  */
  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))
  97
  98 /*
  99  * Convert cputime64 to clock.
 100  */
 101 #define cputime64_to_clock_t(__ct)      \
 102         cputime_to_clock_t((__force cputime_t)__ct)
 103
 104 #endif