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 cputime64_sub(__a, __b)         ((__a) - (__b))
  47 #define cputime_to_cputime64(__ct)      (__ct)
  48
  49 #ifdef __KERNEL__
  50
  51 /*
  52  * Convert cputime <-> jiffies
  53  */
  54 extern u64 __cputime_jiffies_factor;
  55
  56 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
  57 {
  58         return mulhdu(ct, __cputime_jiffies_factor);
  59 }
  60
  61 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
  62 {
  63         cputime_t ct;
  64         unsigned long sec;
  65
  66         /* have to be a little careful about overflow */
  67         ct = jif % HZ;
  68         sec = jif / HZ;
  69         if (ct) {
  70                 ct *= tb_ticks_per_sec;
  71                 do_div(ct, HZ);
  72         }
  73         if (sec)
  74                 ct += (cputime_t) sec * tb_ticks_per_sec;
  75         return ct;
  76 }
  77
  78 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
  79 {
  80         cputime_t ct;
  81         u64 sec;
  82
  83         /* have to be a little careful about overflow */
  84         ct = jif % HZ;
  85         sec = jif / HZ;
  86         if (ct) {
  87                 ct *= tb_ticks_per_sec;
  88                 do_div(ct, HZ);
  89         }
  90         if (sec)
  91                 ct += (cputime_t) sec * tb_ticks_per_sec;
  92         return ct;
  93 }
  94
  95 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
  96 {
  97         return mulhdu(ct, __cputime_jiffies_factor);
  98 }
  99
 100 /*
 101  * Convert cputime <-> milliseconds
 102  */
 103 extern u64 __cputime_msec_factor;
 104
 105 static inline unsigned long cputime_to_msecs(const cputime_t ct)
 106 {
 107         return mulhdu(ct, __cputime_msec_factor);
 108 }
 109
 110 static inline cputime_t msecs_to_cputime(const unsigned long ms)
 111 {
 112         cputime_t ct;
 113         unsigned long sec;
 114
 115         /* have to be a little careful about overflow */
 116         ct = ms % 1000;
 117         sec = ms / 1000;
 118         if (ct) {
 119                 ct *= tb_ticks_per_sec;
 120                 do_div(ct, 1000);
 121         }
 122         if (sec)
 123                 ct += (cputime_t) sec * tb_ticks_per_sec;
 124         return ct;
 125 }
 126
 127 /*
 128  * Convert cputime <-> seconds
 129  */
 130 extern u64 __cputime_sec_factor;
 131
 132 static inline unsigned long cputime_to_secs(const cputime_t ct)
 133 {
 134         return mulhdu(ct, __cputime_sec_factor);
 135 }
 136
 137 static inline cputime_t secs_to_cputime(const unsigned long sec)
 138 {
 139         return (cputime_t) sec * tb_ticks_per_sec;
 140 }
 141
 142 /*
 143  * Convert cputime <-> timespec
 144  */
 145 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
 146 {
 147         u64 x = ct;
 148         unsigned int frac;
 149
 150         frac = do_div(x, tb_ticks_per_sec);
 151         p->tv_sec = x;
 152         x = (u64) frac * 1000000000;
 153         do_div(x, tb_ticks_per_sec);
 154         p->tv_nsec = x;
 155 }
 156
 157 static inline cputime_t timespec_to_cputime(const struct timespec *p)
 158 {
 159         cputime_t ct;
 160
 161         ct = (u64) p->tv_nsec * tb_ticks_per_sec;
 162         do_div(ct, 1000000000);
 163         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 164 }
 165
 166 /*
 167  * Convert cputime <-> timeval
 168  */
 169 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
 170 {
 171         u64 x = ct;
 172         unsigned int frac;
 173
 174         frac = do_div(x, tb_ticks_per_sec);
 175         p->tv_sec = x;
 176         x = (u64) frac * 1000000;
 177         do_div(x, tb_ticks_per_sec);
 178         p->tv_usec = x;
 179 }
 180
 181 static inline cputime_t timeval_to_cputime(const struct timeval *p)
 182 {
 183         cputime_t ct;
 184
 185         ct = (u64) p->tv_usec * tb_ticks_per_sec;
 186         do_div(ct, 1000000);
 187         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 188 }
 189
 190 /*
 191  * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
 192  */
 193 extern u64 __cputime_clockt_factor;
 194
 195 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
 196 {
 197         return mulhdu(ct, __cputime_clockt_factor);
 198 }
 199
 200 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
 201 {
 202         cputime_t ct;
 203         unsigned long sec;
 204
 205         /* have to be a little careful about overflow */
 206         ct = clk % USER_HZ;
 207         sec = clk / USER_HZ;
 208         if (ct) {
 209                 ct *= tb_ticks_per_sec;
 210                 do_div(ct, USER_HZ);
 211         }
 212         if (sec)
 213                 ct += (cputime_t) sec * tb_ticks_per_sec;
 214         return ct;
 215 }
 216
 217 #define cputime64_to_clock_t(ct)        cputime_to_clock_t((cputime_t)(ct))
 218
 219 #endif /* __KERNEL__ */
 220 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
 221 #endif /* __POWERPC_CPUTIME_H */