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__ 22static 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 32typedef u64 __nocast cputime_t; 33typedef u64 __nocast cputime64_t; 34 35#define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new) 36 37#ifdef __KERNEL__ 38 39/* 40 * One jiffy in timebase units computed during initialization 41 */ 42extern cputime_t cputime_one_jiffy; 43 44/* 45 * Convert cputime <-> jiffies 46 */ 47extern u64 __cputime_jiffies_factor; 48DECLARE_PER_CPU(unsigned long, cputime_last_delta); 49DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta); 50 51static inline unsigned long cputime_to_jiffies(const cputime_t ct) 52{ 53 return mulhdu((__force u64) ct, __cputime_jiffies_factor); 54} 55 56/* Estimate the scaled cputime by scaling the real cputime based on 57 * the last scaled to real ratio */ 58static inline cputime_t cputime_to_scaled(const cputime_t ct) 59{ 60 if (cpu_has_feature(CPU_FTR_SPURR) && 61 __this_cpu_read(cputime_last_delta)) 62 return (__force u64) ct * 63 __this_cpu_read(cputime_scaled_last_delta) / 64 __this_cpu_read(cputime_last_delta); 65 return ct; 66} 67 68static inline cputime_t jiffies_to_cputime(const unsigned long jif) 69{ 70 u64 ct; 71 unsigned long sec; 72 73 /* have to be a little careful about overflow */ 74 ct = jif % HZ; 75 sec = jif / HZ; 76 if (ct) { 77 ct *= tb_ticks_per_sec; 78 do_div(ct, HZ); 79 } 80 if (sec) 81 ct += (cputime_t) sec * tb_ticks_per_sec; 82 return (__force cputime_t) ct; 83} 84 85static inline void setup_cputime_one_jiffy(void) 86{ 87 cputime_one_jiffy = jiffies_to_cputime(1); 88} 89 90static inline cputime64_t jiffies64_to_cputime64(const u64 jif) 91{ 92 u64 ct; 93 u64 sec; 94 95 /* have to be a little careful about overflow */ 96 ct = jif % HZ; 97 sec = jif / HZ; 98 if (ct) { 99 ct *= tb_ticks_per_sec; 100 do_div(ct, HZ); 101 } 102 if (sec) 103 ct += (u64) sec * tb_ticks_per_sec; 104 return (__force cputime64_t) ct; 105} 106 107static inline u64 cputime64_to_jiffies64(const cputime_t ct) 108{ 109 return mulhdu((__force u64) ct, __cputime_jiffies_factor); 110} 111 112/* 113 * Convert cputime <-> microseconds 114 */ 115extern u64 __cputime_usec_factor; 116 117static inline unsigned long cputime_to_usecs(const cputime_t ct) 118{ 119 return mulhdu((__force u64) ct, __cputime_usec_factor); 120} 121 122static inline cputime_t usecs_to_cputime(const unsigned long us) 123{ 124 u64 ct; 125 unsigned long sec; 126 127 /* have to be a little careful about overflow */ 128 ct = us % 1000000; 129 sec = us / 1000000; 130 if (ct) { 131 ct *= tb_ticks_per_sec; 132 do_div(ct, 1000000); 133 } 134 if (sec) 135 ct += (cputime_t) sec * tb_ticks_per_sec; 136 return (__force cputime_t) ct; 137} 138 139#define usecs_to_cputime64(us) usecs_to_cputime(us) 140 141/* 142 * Convert cputime <-> seconds 143 */ 144extern u64 __cputime_sec_factor; 145 146static inline unsigned long cputime_to_secs(const cputime_t ct) 147{ 148 return mulhdu((__force u64) ct, __cputime_sec_factor); 149} 150 151static inline cputime_t secs_to_cputime(const unsigned long sec) 152{ 153 return (__force cputime_t)((u64) sec * tb_ticks_per_sec); 154} 155 156/* 157 * Convert cputime <-> timespec 158 */ 159static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p) 160{ 161 u64 x = (__force u64) 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 171static inline cputime_t timespec_to_cputime(const struct timespec *p) 172{ 173 u64 ct; 174 175 ct = (u64) p->tv_nsec * tb_ticks_per_sec; 176 do_div(ct, 1000000000); 177 return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec); 178} 179 180/* 181 * Convert cputime <-> timeval 182 */ 183static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p) 184{ 185 u64 x = (__force u64) 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 195static inline cputime_t timeval_to_cputime(const struct timeval *p) 196{ 197 u64 ct; 198 199 ct = (u64) p->tv_usec * tb_ticks_per_sec; 200 do_div(ct, 1000000); 201 return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec); 202} 203 204/* 205 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds) 206 */ 207extern u64 __cputime_clockt_factor; 208 209static inline unsigned long cputime_to_clock_t(const cputime_t ct) 210{ 211 return mulhdu((__force u64) ct, __cputime_clockt_factor); 212} 213 214static inline cputime_t clock_t_to_cputime(const unsigned long clk) 215{ 216 u64 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 += (u64) sec * tb_ticks_per_sec; 228 return (__force cputime_t) ct; 229} 230 231#define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct)) 232 233static inline void arch_vtime_task_switch(struct task_struct *tsk) { } 234 235#endif /* __KERNEL__ */ 236#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ 237#endif /* __POWERPC_CPUTIME_H */ 238