arch/powerpc/include/asm/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 #ifdef __KERNEL__
  22 static inline void setup_cputime_one_jiffy(void) { }
  23 #endif
  24 #else
  25
  26 #include <linux/types.h>
  27 #include <linux/time.h>
  28 #include <asm/div64.h>
  29 #include <asm/time.h>
  30 #include <asm/param.h>
  31
  32 typedef u64 cputime_t;
  33 typedef u64 cputime64_t;
  34
  35 #define cputime_zero                    ((cputime_t)0)
  36 #define cputime_max                     ((~((cputime_t)0) >> 1) - 1)
  37 #define cputime_add(__a, __b)           ((__a) +  (__b))
  38 #define cputime_sub(__a, __b)           ((__a) -  (__b))
  39 #define cputime_div(__a, __n)           ((__a) /  (__n))
  40 #define cputime_halve(__a)              ((__a) >> 1)
  41 #define cputime_eq(__a, __b)            ((__a) == (__b))
  42 #define cputime_gt(__a, __b)            ((__a) >  (__b))
  43 #define cputime_ge(__a, __b)            ((__a) >= (__b))
  44 #define cputime_lt(__a, __b)            ((__a) <  (__b))
  45 #define cputime_le(__a, __b)            ((__a) <= (__b))
  46
  47 #define cputime64_zero                  ((cputime64_t)0)
  48 #define cputime64_add(__a, __b)         ((__a) + (__b))
  49 #define cputime64_sub(__a, __b)         ((__a) - (__b))
  50 #define cputime_to_cputime64(__ct)      (__ct)
  51
  52 #ifdef __KERNEL__
  53
  54 /*
  55  * One jiffy in timebase units computed during initialization
  56  */
  57 extern cputime_t cputime_one_jiffy;
  58
  59 /*
  60  * Convert cputime <-> jiffies
  61  */
  62 extern u64 __cputime_jiffies_factor;
  63 DECLARE_PER_CPU(unsigned long, cputime_last_delta);
  64 DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
  65
  66 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
  67 {
  68         return mulhdu(ct, __cputime_jiffies_factor);
  69 }
  70
  71 /* Estimate the scaled cputime by scaling the real cputime based on
  72  * the last scaled to real ratio */
  73 static inline cputime_t cputime_to_scaled(const cputime_t ct)
  74 {
  75         if (cpu_has_feature(CPU_FTR_SPURR) &&
  76             per_cpu(cputime_last_delta, smp_processor_id()))
  77                 return ct *
  78                         per_cpu(cputime_scaled_last_delta, smp_processor_id())/
  79                         per_cpu(cputime_last_delta, smp_processor_id());
  80         return ct;
  81 }
  82
  83 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
  84 {
  85         cputime_t ct;
  86         unsigned long sec;
  87
  88         /* have to be a little careful about overflow */
  89         ct = jif % HZ;
  90         sec = jif / HZ;
  91         if (ct) {
  92                 ct *= tb_ticks_per_sec;
  93                 do_div(ct, HZ);
  94         }
  95         if (sec)
  96                 ct += (cputime_t) sec * tb_ticks_per_sec;
  97         return ct;
  98 }
  99
 100 static inline void setup_cputime_one_jiffy(void)
 101 {
 102         cputime_one_jiffy = jiffies_to_cputime(1);
 103 }
 104
 105 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
 106 {
 107         cputime_t ct;
 108         u64 sec;
 109
 110         /* have to be a little careful about overflow */
 111         ct = jif % HZ;
 112         sec = jif / HZ;
 113         if (ct) {
 114                 ct *= tb_ticks_per_sec;
 115                 do_div(ct, HZ);
 116         }
 117         if (sec)
 118                 ct += (cputime_t) sec * tb_ticks_per_sec;
 119         return ct;
 120 }
 121
 122 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
 123 {
 124         return mulhdu(ct, __cputime_jiffies_factor);
 125 }
 126
 127 /*
 128  * Convert cputime <-> milliseconds
 129  */
 130 extern u64 __cputime_msec_factor;
 131
 132 static inline unsigned long cputime_to_msecs(const cputime_t ct)
 133 {
 134         return mulhdu(ct, __cputime_msec_factor);
 135 }
 136
 137 static inline cputime_t msecs_to_cputime(const unsigned long ms)
 138 {
 139         cputime_t ct;
 140         unsigned long sec;
 141
 142         /* have to be a little careful about overflow */
 143         ct = ms % 1000;
 144         sec = ms / 1000;
 145         if (ct) {
 146                 ct *= tb_ticks_per_sec;
 147                 do_div(ct, 1000);
 148         }
 149         if (sec)
 150                 ct += (cputime_t) sec * tb_ticks_per_sec;
 151         return ct;
 152 }
 153
 154 /*
 155  * Convert cputime <-> seconds
 156  */
 157 extern u64 __cputime_sec_factor;
 158
 159 static inline unsigned long cputime_to_secs(const cputime_t ct)
 160 {
 161         return mulhdu(ct, __cputime_sec_factor);
 162 }
 163
 164 static inline cputime_t secs_to_cputime(const unsigned long sec)
 165 {
 166         return (cputime_t) sec * tb_ticks_per_sec;
 167 }
 168
 169 /*
 170  * Convert cputime <-> timespec
 171  */
 172 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
 173 {
 174         u64 x = ct;
 175         unsigned int frac;
 176
 177         frac = do_div(x, tb_ticks_per_sec);
 178         p->tv_sec = x;
 179         x = (u64) frac * 1000000000;
 180         do_div(x, tb_ticks_per_sec);
 181         p->tv_nsec = x;
 182 }
 183
 184 static inline cputime_t timespec_to_cputime(const struct timespec *p)
 185 {
 186         cputime_t ct;
 187
 188         ct = (u64) p->tv_nsec * tb_ticks_per_sec;
 189         do_div(ct, 1000000000);
 190         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 191 }
 192
 193 /*
 194  * Convert cputime <-> timeval
 195  */
 196 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
 197 {
 198         u64 x = ct;
 199         unsigned int frac;
 200
 201         frac = do_div(x, tb_ticks_per_sec);
 202         p->tv_sec = x;
 203         x = (u64) frac * 1000000;
 204         do_div(x, tb_ticks_per_sec);
 205         p->tv_usec = x;
 206 }
 207
 208 static inline cputime_t timeval_to_cputime(const struct timeval *p)
 209 {
 210         cputime_t ct;
 211
 212         ct = (u64) p->tv_usec * tb_ticks_per_sec;
 213         do_div(ct, 1000000);
 214         return ct + (u64) p->tv_sec * tb_ticks_per_sec;
 215 }
 216
 217 /*
 218  * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
 219  */
 220 extern u64 __cputime_clockt_factor;
 221
 222 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
 223 {
 224         return mulhdu(ct, __cputime_clockt_factor);
 225 }
 226
 227 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
 228 {
 229         cputime_t ct;
 230         unsigned long sec;
 231
 232         /* have to be a little careful about overflow */
 233         ct = clk % USER_HZ;
 234         sec = clk / USER_HZ;
 235         if (ct) {
 236                 ct *= tb_ticks_per_sec;
 237                 do_div(ct, USER_HZ);
 238         }
 239         if (sec)
 240                 ct += (cputime_t) sec * tb_ticks_per_sec;
 241         return ct;
 242 }
 243
 244 #define cputime64_to_clock_t(ct)        cputime_to_clock_t((cputime_t)(ct))
 245
 246 #endif /* __KERNEL__ */
 247 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
 248 #endif /* __POWERPC_CPUTIME_H */