include/asm-powerpc/cputime.h

   1 /*
   2  * Definitions for measuring cputime on powerpc machines.
   3  *
   4  * Copyright (C) 2006 Paul Mackerras, IBM Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in
  12  * the same units as the timebase.  Otherwise we measure cpu time
  13  * in jiffies using the generic definitions.
  14  */
  15
  16 #ifndef __POWERPC_CPUTIME_H
  17 #define __POWERPC_CPUTIME_H
  18
  19 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
  20 #include <asm-generic/cputime.h>
  21 #else
  22
  23 #include <linux/types.h>
  24 #include <linux/time.h>
  25 #include <asm/div64.h>
  26 #include <asm/time.h>
  27 #include <asm/param.h>
  28
  29 typedef u64 cputime_t;
  30 typedef u64 cputime64_t;
  31
  32 #define cputime_zero                    ((cputime_t)0)
  33 #define cputime_max                     ((~((cputime_t)0) >> 1) - 1)
  34 #define cputime_add(__a, __b)           ((__a) +  (__b))
  35 #define cputime_sub(__a, __b)           ((__a) -  (__b))
  36 #define cputime_div(__a, __n)           ((__a) /  (__n))
  37 #define cputime_halve(__a)              ((__a) >> 1)
  38 #define cputime_eq(__a, __b)            ((__a) == (__b))
  39 #define cputime_gt(__a, __b)            ((__a) >  (__b))
  40 #define cputime_ge(__a, __b)            ((__a) >= (__b))
  41 #define cputime_lt(__a, __b)            ((__a) <  (__b))
  42 #define cputime_le(__a, __b)            ((__a) <= (__b))
  43
  44 #define cputime64_zero                  ((cputime64_t)0)
  45 #define cputime64_add(__a, __b)         ((__a) + (__b))
  46 #define cputime_to_cputime64(__ct)      (__ct)
  47
  48 #ifdef __KERNEL__
  49
  50 /*
  51  * Convert cputime <-> jiffies
  52  */
  53 extern u64 __cputime_jiffies_factor;
  54
  55 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
  56 {
  57         return mulhdu(ct, __cputime_jiffies_factor);
  58 }
  59
  60 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
  61 {
  62         cputime_t ct;
  63         unsigned long sec;
  64
  65         /* have to be a little careful about overflow */
  66         ct = jif % HZ;
  67         sec = jif / HZ;
  68         if (ct) {
  69                 ct *= tb_ticks_per_sec;
  70                 do_div(ct, HZ);
  71         }
  72         if (sec)
  73                 ct += (cputime_t) sec * tb_ticks_per_sec;
  74         return ct;
  75 }
  76
  77 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
  78 {
  79         return mulhdu(ct, __cputime_jiffies_factor);
  80 }
  81
  82 /*
  83  * Convert cputime <-> milliseconds
  84  */
  85 extern u64 __cputime_msec_factor;
  86
  87 static inline unsigned long cputime_to_msecs(const cputime_t ct)
  88 {
  89         return mulhdu(ct, __cputime_msec_factor);
  90 }
  91
  92 static inline cputime_t msecs_to_cputime(const unsigned long ms)
  93 {
  94         cputime_t ct;
  95         unsigned long sec;
  96
  97         /* have to be a little careful about overflow */
  98         ct = ms % 1000;
  99         sec = ms / 1000;
 100         if (ct) {
 101                 ct *= tb_ticks_per_sec;
 102                 do_div(ct, 1000);
 103         }
 104         if (sec)
 105                 ct += (cputime_t) sec * tb_ticks_per_sec;
 106         return ct;
 107 }
 108
 109 /*
 110  * Convert cputime <-> seconds
 111  */
 112 extern u64 __cputime_sec_factor;
 113
 114 static inline unsigned long cputime_to_secs(const cputime_t ct)
 115 {
 116         return mulhdu(ct, __cputime_sec_factor);
 117 }
 118
 119 static inline cputime_t secs_to_cputime(const unsigned long sec)
 120 {
 121         return (cputime_t) sec * tb_ticks_per_sec;
 122 }
 123
 124 /*
 125  * Convert cputime <-> timespec
 126  */
 127 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
 128 {
 129         u64 x = ct;
 130         unsigned int frac;
 131
 132         frac = do_div(x, tb_ticks_per_sec);
 133         p->tv_sec = x;
 134         x = (u64) frac * 1000000000;
 135         do_div(x, tb_ticks_per_sec);
 136         p->tv_nsec = x;
 137 }
 138
 139 static inline cputime_t timespec_to_cputime(const struct timespec *p)
 140 {
 141         cputime_t ct;
 142
 143         ct = (u64) p->tv_nsec * tb_ticks_per_sec;
 144         do_div(ct, 1000000000);
 145         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 146 }
 147
 148 /*
 149  * Convert cputime <-> timeval
 150  */
 151 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
 152 {
 153         u64 x = ct;
 154         unsigned int frac;
 155
 156         frac = do_div(x, tb_ticks_per_sec);
 157         p->tv_sec = x;
 158         x = (u64) frac * 1000000;
 159         do_div(x, tb_ticks_per_sec);
 160         p->tv_usec = x;
 161 }
 162
 163 static inline cputime_t timeval_to_cputime(const struct timeval *p)
 164 {
 165         cputime_t ct;
 166
 167         ct = (u64) p->tv_usec * tb_ticks_per_sec;
 168         do_div(ct, 1000000);
 169         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 170 }
 171
 172 /*
 173  * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
 174  */
 175 extern u64 __cputime_clockt_factor;
 176
 177 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
 178 {
 179         return mulhdu(ct, __cputime_clockt_factor);
 180 }
 181
 182 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
 183 {
 184         cputime_t ct;
 185         unsigned long sec;
 186
 187         /* have to be a little careful about overflow */
 188         ct = clk % USER_HZ;
 189         sec = clk / USER_HZ;
 190         if (ct) {
 191                 ct *= tb_ticks_per_sec;
 192                 do_div(ct, USER_HZ);
 193         }
 194         if (sec)
 195                 ct += (cputime_t) sec * tb_ticks_per_sec;
 196         return ct;
 197 }
 198
 199 #define cputime64_to_clock_t(ct)        cputime_to_clock_t((cputime_t)(ct))
 200
 201 #endif /* __KERNEL__ */
 202 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
 203 #endif /* __POWERPC_CPUTIME_H */