arch/ia64/include/asm/cputime.h

   1 /*
   2  * Definitions for measuring cputime on ia64 machines.
   3  *
   4  * Based on <asm-powerpc/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  * If we have CONFIG_VIRT_CPU_ACCOUNTING_NATIVE, we measure cpu time in nsec.
  15  * Otherwise we measure cpu time in jiffies using the generic definitions.
  16  */
  17
  18 #ifndef __IA64_CPUTIME_H
  19 #define __IA64_CPUTIME_H
  20
  21 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
  22 # include <asm-generic/cputime.h>
  23
  24 #else
  25
  26 #include <asm/processor.h>
  27 #include <linux/math64.h>
  28
  29 typedef u64 __nocast cputime_t;
  30 typedef u64 __nocast cputime64_t;
  31
  32 #define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
  33
  34 #define cputime_one_jiffy               jiffies_to_cputime(1)
  35
  36 #define cputime_div(__ct, divisor)  div_u64((__force u64)__ct, divisor)
  37 #define cputime_div_rem(__ct, divisor, remainder) \
  38         div_u64_rem((__force u64)__ct, divisor, remainder);
  39
  40 /*
  41  * Convert cputime <-> jiffies (HZ)
  42  */
  43 #define cputime_to_jiffies(__ct)        \
  44         cputime_div(__ct, NSEC_PER_SEC / HZ)
  45 #define jiffies_to_cputime(__jif)       \
  46         (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
  47 #define cputime64_to_jiffies64(__ct)    \
  48         cputime_div(__ct, NSEC_PER_SEC / HZ)
  49 #define jiffies64_to_cputime64(__jif)   \
  50         (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
  51
  52
  53 /*
  54  * Convert cputime <-> nanoseconds
  55  */
  56 #define cputime_to_nsecs(__ct)          \
  57         (__force u64)(__ct)
  58 #define nsecs_to_cputime(__nsecs)       \
  59         (__force cputime_t)(__nsecs)
  60 #define nsecs_to_cputime64(__nsecs)     \
  61         (__force cputime64_t)(__nsecs)
  62
  63
  64 /*
  65  * Convert cputime <-> microseconds
  66  */
  67 #define cputime_to_usecs(__ct)          \
  68         cputime_div(__ct, NSEC_PER_USEC)
  69 #define usecs_to_cputime(__usecs)       \
  70         (__force cputime_t)((__usecs) * NSEC_PER_USEC)
  71 #define usecs_to_cputime64(__usecs)     \
  72         (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
  73
  74 /*
  75  * Convert cputime <-> seconds
  76  */
  77 #define cputime_to_secs(__ct)           \
  78         cputime_div(__ct, NSEC_PER_SEC)
  79 #define secs_to_cputime(__secs)         \
  80         (__force cputime_t)((__secs) * NSEC_PER_SEC)
  81
  82 /*
  83  * Convert cputime <-> timespec (nsec)
  84  */
  85 static inline cputime_t timespec_to_cputime(const struct timespec *val)
  86 {
  87         u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
  88         return (__force cputime_t) ret;
  89 }
  90 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
  91 {
  92         u32 rem;
  93
  94         val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
  95         val->tv_nsec = rem;
  96 }
  97
  98 /*
  99  * Convert cputime <-> timeval (msec)
 100  */
 101 static inline cputime_t timeval_to_cputime(const struct timeval *val)
 102 {
 103         u64 ret = (u64)val->tv_sec * NSEC_PER_SEC +
 104                         val->tv_usec * NSEC_PER_USEC;
 105         return (__force cputime_t) ret;
 106 }
 107 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
 108 {
 109         u32 rem;
 110
 111         val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
 112         val->tv_usec = rem / NSEC_PER_USEC;
 113 }
 114
 115 /*
 116  * Convert cputime <-> clock (USER_HZ)
 117  */
 118 #define cputime_to_clock_t(__ct)        \
 119         cputime_div(__ct, (NSEC_PER_SEC / USER_HZ))
 120 #define clock_t_to_cputime(__x)         \
 121         (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
 122
 123 /*
 124  * Convert cputime64 to clock.
 125  */
 126 #define cputime64_to_clock_t(__ct)      \
 127         cputime_to_clock_t((__force cputime_t)__ct)
 128
 129
 130 extern void arch_vtime_task_switch(struct task_struct *tsk);
 131 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
 132
 133 #endif /* __IA64_CPUTIME_H */