2 * Definitions for measuring cputime on powerpc machines.
4 * Copyright (C) 2006 Paul Mackerras, IBM Corp.
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.
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.
16 #ifndef __POWERPC_CPUTIME_H
17 #define __POWERPC_CPUTIME_H
19 #ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
20 #include <asm-generic/cputime.h>
22 static inline void setup_cputime_one_jiffy(void) { }
26 #include <linux/types.h>
27 #include <linux/time.h>
28 #include <asm/div64.h>
30 #include <asm/param.h>
32 typedef u64 __nocast cputime_t;
33 typedef u64 __nocast cputime64_t;
38 * One jiffy in timebase units computed during initialization
40 extern cputime_t cputime_one_jiffy;
43 * Convert cputime <-> jiffies
45 extern u64 __cputime_jiffies_factor;
46 DECLARE_PER_CPU(unsigned long, cputime_last_delta);
47 DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
49 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
51 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
54 /* Estimate the scaled cputime by scaling the real cputime based on
55 * the last scaled to real ratio */
56 static inline cputime_t cputime_to_scaled(const cputime_t ct)
58 if (cpu_has_feature(CPU_FTR_SPURR) &&
59 __get_cpu_var(cputime_last_delta))
60 return (__force u64) ct *
61 __get_cpu_var(cputime_scaled_last_delta) /
62 __get_cpu_var(cputime_last_delta);
66 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
71 /* have to be a little careful about overflow */
75 ct *= tb_ticks_per_sec;
79 ct += (cputime_t) sec * tb_ticks_per_sec;
80 return (__force cputime_t) ct;
83 static inline void setup_cputime_one_jiffy(void)
85 cputime_one_jiffy = jiffies_to_cputime(1);
88 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
93 /* have to be a little careful about overflow */
97 ct *= tb_ticks_per_sec;
101 ct += (u64) sec * tb_ticks_per_sec;
102 return (__force cputime64_t) ct;
105 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
107 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
111 * Convert cputime <-> microseconds
113 extern u64 __cputime_usec_factor;
115 static inline unsigned long cputime_to_usecs(const cputime_t ct)
117 return mulhdu((__force u64) ct, __cputime_usec_factor);
120 static inline cputime_t usecs_to_cputime(const unsigned long us)
125 /* have to be a little careful about overflow */
129 ct *= tb_ticks_per_sec;
133 ct += (cputime_t) sec * tb_ticks_per_sec;
134 return (__force cputime_t) ct;
137 #define usecs_to_cputime64(us) usecs_to_cputime(us)
140 * Convert cputime <-> seconds
142 extern u64 __cputime_sec_factor;
144 static inline unsigned long cputime_to_secs(const cputime_t ct)
146 return mulhdu((__force u64) ct, __cputime_sec_factor);
149 static inline cputime_t secs_to_cputime(const unsigned long sec)
151 return (__force cputime_t)((u64) sec * tb_ticks_per_sec);
155 * Convert cputime <-> timespec
157 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
159 u64 x = (__force u64) ct;
162 frac = do_div(x, tb_ticks_per_sec);
164 x = (u64) frac * 1000000000;
165 do_div(x, tb_ticks_per_sec);
169 static inline cputime_t timespec_to_cputime(const struct timespec *p)
173 ct = (u64) p->tv_nsec * tb_ticks_per_sec;
174 do_div(ct, 1000000000);
175 return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec);
179 * Convert cputime <-> timeval
181 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
183 u64 x = (__force u64) ct;
186 frac = do_div(x, tb_ticks_per_sec);
188 x = (u64) frac * 1000000;
189 do_div(x, tb_ticks_per_sec);
193 static inline cputime_t timeval_to_cputime(const struct timeval *p)
197 ct = (u64) p->tv_usec * tb_ticks_per_sec;
199 return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec);
203 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
205 extern u64 __cputime_clockt_factor;
207 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
209 return mulhdu((__force u64) ct, __cputime_clockt_factor);
212 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
217 /* have to be a little careful about overflow */
221 ct *= tb_ticks_per_sec;
225 ct += (u64) sec * tb_ticks_per_sec;
226 return (__force cputime_t) ct;
229 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
231 static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
233 #endif /* __KERNEL__ */
234 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
235 #endif /* __POWERPC_CPUTIME_H */