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 DECLARE_PER_CPU(unsigned long, cputime_last_delta); 56 DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta); 57 58 static inline unsigned long cputime_to_jiffies(const cputime_t ct) 59 { 60 return mulhdu(ct, __cputime_jiffies_factor); 61 } 62 63 /* Estimate the scaled cputime by scaling the real cputime based on 64 * the last scaled to real ratio */ 65 static inline cputime_t cputime_to_scaled(const cputime_t ct) 66 { 67 if (cpu_has_feature(CPU_FTR_SPURR) && 68 per_cpu(cputime_last_delta, smp_processor_id())) 69 return ct * 70 per_cpu(cputime_scaled_last_delta, smp_processor_id())/ 71 per_cpu(cputime_last_delta, smp_processor_id()); 72 return ct; 73 } 74 75 static inline cputime_t jiffies_to_cputime(const unsigned long jif) 76 { 77 cputime_t ct; 78 unsigned long sec; 79 80 /* have to be a little careful about overflow */ 81 ct = jif % HZ; 82 sec = jif / HZ; 83 if (ct) { 84 ct *= tb_ticks_per_sec; 85 do_div(ct, HZ); 86 } 87 if (sec) 88 ct += (cputime_t) sec * tb_ticks_per_sec; 89 return ct; 90 } 91 92 static inline cputime64_t jiffies64_to_cputime64(const u64 jif) 93 { 94 cputime_t ct; 95 u64 sec; 96 97 /* have to be a little careful about overflow */ 98 ct = jif % HZ; 99 sec = jif / HZ; 100 if (ct) { 101 ct *= tb_ticks_per_sec; 102 do_div(ct, HZ); 103 } 104 if (sec) 105 ct += (cputime_t) sec * tb_ticks_per_sec; 106 return ct; 107 } 108 109 static inline u64 cputime64_to_jiffies64(const cputime_t ct) 110 { 111 return mulhdu(ct, __cputime_jiffies_factor); 112 } 113 114 /* 115 * Convert cputime <-> milliseconds 116 */ 117 extern u64 __cputime_msec_factor; 118 119 static inline unsigned long cputime_to_msecs(const cputime_t ct) 120 { 121 return mulhdu(ct, __cputime_msec_factor); 122 } 123 124 static inline cputime_t msecs_to_cputime(const unsigned long ms) 125 { 126 cputime_t ct; 127 unsigned long sec; 128 129 /* have to be a little careful about overflow */ 130 ct = ms % 1000; 131 sec = ms / 1000; 132 if (ct) { 133 ct *= tb_ticks_per_sec; 134 do_div(ct, 1000); 135 } 136 if (sec) 137 ct += (cputime_t) sec * tb_ticks_per_sec; 138 return ct; 139 } 140 141 /* 142 * Convert cputime <-> seconds 143 */ 144 extern u64 __cputime_sec_factor; 145 146 static inline unsigned long cputime_to_secs(const cputime_t ct) 147 { 148 return mulhdu(ct, __cputime_sec_factor); 149 } 150 151 static inline cputime_t secs_to_cputime(const unsigned long sec) 152 { 153 return (cputime_t) sec * tb_ticks_per_sec; 154 } 155 156 /* 157 * Convert cputime <-> timespec 158 */ 159 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) 160 { 161 u64 x = ct; 162 unsigned int frac; 163 164 frac = do_div(x, tb_ticks_per_sec); 165 p->tv_sec = x; 166 x = (u64) frac * 1000000000; 167 do_div(x, tb_ticks_per_sec); 168 p->tv_nsec = x; 169 } 170 171 static inline cputime_t timespec_to_cputime(const struct timespec *p) 172 { 173 cputime_t ct; 174 175 ct = (u64) p->tv_nsec * tb_ticks_per_sec; 176 do_div(ct, 1000000000); 177 return ct + (u64) p->tv_sec * tb_ticks_per_sec; 178 } 179 180 /* 181 * Convert cputime <-> timeval 182 */ 183 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p) 184 { 185 u64 x = ct; 186 unsigned int frac; 187 188 frac = do_div(x, tb_ticks_per_sec); 189 p->tv_sec = x; 190 x = (u64) frac * 1000000; 191 do_div(x, tb_ticks_per_sec); 192 p->tv_usec = x; 193 } 194 195 static inline cputime_t timeval_to_cputime(const struct timeval *p) 196 { 197 cputime_t ct; 198 199 ct = (u64) p->tv_usec * tb_ticks_per_sec; 200 do_div(ct, 1000000); 201 return ct + (u64) p->tv_sec * tb_ticks_per_sec; 202 } 203 204 /* 205 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds) 206 */ 207 extern u64 __cputime_clockt_factor; 208 209 static inline unsigned long cputime_to_clock_t(const cputime_t ct) 210 { 211 return mulhdu(ct, __cputime_clockt_factor); 212 } 213 214 static inline cputime_t clock_t_to_cputime(const unsigned long clk) 215 { 216 cputime_t ct; 217 unsigned long sec; 218 219 /* have to be a little careful about overflow */ 220 ct = clk % USER_HZ; 221 sec = clk / USER_HZ; 222 if (ct) { 223 ct *= tb_ticks_per_sec; 224 do_div(ct, USER_HZ); 225 } 226 if (sec) 227 ct += (cputime_t) sec * tb_ticks_per_sec; 228 return ct; 229 } 230 231 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct)) 232 233 #endif /* __KERNEL__ */ 234 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */ 235 #endif /* __POWERPC_CPUTIME_H */ 236