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_NATIVE, 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_NATIVE 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 #include <asm/cpu_has_feature.h> 32 33 typedef u64 __nocast cputime_t; 34 typedef u64 __nocast cputime64_t; 35 36 #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new) 37 38 #ifdef __KERNEL__ 39 40 /* 41 * One jiffy in timebase units computed during initialization 42 */ 43 extern cputime_t cputime_one_jiffy; 44 45 /* 46 * Convert cputime <-> jiffies 47 */ 48 extern u64 __cputime_jiffies_factor; 49 50 static inline unsigned long cputime_to_jiffies(const cputime_t ct) 51 { 52 return mulhdu((__force u64) ct, __cputime_jiffies_factor); 53 } 54 55 static inline cputime_t jiffies_to_cputime(const unsigned long jif) 56 { 57 u64 ct; 58 unsigned long sec; 59 60 /* have to be a little careful about overflow */ 61 ct = jif % HZ; 62 sec = jif / HZ; 63 if (ct) { 64 ct *= tb_ticks_per_sec; 65 do_div(ct, HZ); 66 } 67 if (sec) 68 ct += (cputime_t) sec * tb_ticks_per_sec; 69 return (__force cputime_t) ct; 70 } 71 72 static inline void setup_cputime_one_jiffy(void) 73 { 74 cputime_one_jiffy = jiffies_to_cputime(1); 75 } 76 77 static inline cputime64_t jiffies64_to_cputime64(const u64 jif) 78 { 79 u64 ct; 80 u64 sec = jif; 81 82 /* have to be a little careful about overflow */ 83 ct = do_div(sec, HZ); 84 if (ct) { 85 ct *= tb_ticks_per_sec; 86 do_div(ct, HZ); 87 } 88 if (sec) 89 ct += (u64) sec * tb_ticks_per_sec; 90 return (__force cputime64_t) ct; 91 } 92 93 static inline u64 cputime64_to_jiffies64(const cputime_t ct) 94 { 95 return mulhdu((__force u64) ct, __cputime_jiffies_factor); 96 } 97 98 /* 99 * Convert cputime <-> microseconds 100 */ 101 extern u64 __cputime_usec_factor; 102 103 static inline unsigned long cputime_to_usecs(const cputime_t ct) 104 { 105 return mulhdu((__force u64) ct, __cputime_usec_factor); 106 } 107 108 static inline cputime_t usecs_to_cputime(const unsigned long us) 109 { 110 u64 ct; 111 unsigned long sec; 112 113 /* have to be a little careful about overflow */ 114 ct = us % 1000000; 115 sec = us / 1000000; 116 if (ct) { 117 ct *= tb_ticks_per_sec; 118 do_div(ct, 1000000); 119 } 120 if (sec) 121 ct += (cputime_t) sec * tb_ticks_per_sec; 122 return (__force cputime_t) ct; 123 } 124 125 #define usecs_to_cputime64(us) usecs_to_cputime(us) 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((__force u64) ct, __cputime_sec_factor); 135 } 136 137 static inline cputime_t secs_to_cputime(const unsigned long sec) 138 { 139 return (__force cputime_t)((u64) 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 = (__force u64) 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 u64 ct; 160 161 ct = (u64) p->tv_nsec * tb_ticks_per_sec; 162 do_div(ct, 1000000000); 163 return (__force cputime_t)(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 = (__force u64) 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 u64 ct; 184 185 ct = (u64) p->tv_usec * tb_ticks_per_sec; 186 do_div(ct, 1000000); 187 return (__force cputime_t)(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((__force u64) ct, __cputime_clockt_factor); 198 } 199 200 static inline cputime_t clock_t_to_cputime(const unsigned long clk) 201 { 202 u64 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 += (u64) sec * tb_ticks_per_sec; 214 return (__force cputime_t) ct; 215 } 216 217 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct)) 218 219 /* 220 * PPC64 uses PACA which is task independent for storing accounting data while 221 * PPC32 uses struct thread_info, therefore at task switch the accounting data 222 * has to be populated in the new task 223 */ 224 #ifdef CONFIG_PPC64 225 static inline void arch_vtime_task_switch(struct task_struct *tsk) { } 226 #else 227 void arch_vtime_task_switch(struct task_struct *tsk); 228 #endif 229 230 #endif /* __KERNEL__ */ 231 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 232 #endif /* __POWERPC_CPUTIME_H */ 233