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 #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 jiffies_to_cputime(__jif)       \
  38         (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
  39 #define cputime64_to_jiffies64(__ct)    \
  40         cputime_div(__ct, NSEC_PER_SEC / HZ)
  41 #define jiffies64_to_cputime64(__jif)   \
  42         (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
  43
  44
  45 /*
  46  * Convert cputime <-> nanoseconds
  47  */
  48 #define cputime_to_nsecs(__ct)          \
  49         (__force u64)(__ct)
  50 #define nsecs_to_cputime(__nsecs)       \
  51         (__force cputime_t)(__nsecs)
  52 #define nsecs_to_cputime64(__nsecs)     \
  53         (__force cputime64_t)(__nsecs)
  54
  55
  56 /*
  57  * Convert cputime <-> microseconds
  58  */
  59 #define cputime_to_usecs(__ct)          \
  60         cputime_div(__ct, NSEC_PER_USEC)
  61 #define usecs_to_cputime(__usecs)       \
  62         (__force cputime_t)((__usecs) * NSEC_PER_USEC)
  63 #define usecs_to_cputime64(__usecs)     \
  64         (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
  65
  66 /*
  67  * Convert cputime <-> seconds
  68  */
  69 #define cputime_to_secs(__ct)           \
  70         cputime_div(__ct, NSEC_PER_SEC)
  71 #define secs_to_cputime(__secs)         \
  72         (__force cputime_t)((__secs) * NSEC_PER_SEC)
  73
  74 /*
  75  * Convert cputime <-> timespec (nsec)
  76  */
  77 static inline cputime_t timespec_to_cputime(const struct timespec *val)
  78 {
  79         u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
  80         return (__force cputime_t) ret;
  81 }
  82 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
  83 {
  84         u32 rem;
  85
  86         val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
  87         val->tv_nsec = rem;
  88 }
  89
  90 /*
  91  * Convert cputime <-> timeval (msec)
  92  */
  93 static inline cputime_t timeval_to_cputime(const struct timeval *val)
  94 {
  95         u64 ret = (u64)val->tv_sec * NSEC_PER_SEC +
  96                         val->tv_usec * NSEC_PER_USEC;
  97         return (__force cputime_t) ret;
  98 }
  99 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
 100 {
 101         u32 rem;
 102
 103         val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
 104         val->tv_usec = rem / NSEC_PER_USEC;
 105 }
 106
 107 /*
 108  * Convert cputime <-> clock (USER_HZ)
 109  */
 110 #define cputime_to_clock_t(__ct)        \
 111         cputime_div(__ct, (NSEC_PER_SEC / USER_HZ))
 112 #define clock_t_to_cputime(__x)         \
 113         (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
 114
 115 /*
 116  * Convert cputime64 to clock.
 117  */
 118 #define cputime64_to_clock_t(__ct)      \
 119         cputime_to_clock_t((__force cputime_t)__ct)
 120
 121 #endif