linux/include/asm-generic/cputime_nsecs.h
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   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
  19typedef u64 __nocast cputime_t;
  20typedef 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 */
  65static 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}
  70static 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 */
  79static 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}
  84static 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
 105
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