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;
35 #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
40 * One jiffy in timebase units computed during initialization
42 extern cputime_t cputime_one_jiffy;
45 * Convert cputime <-> jiffies
47 extern u64 __cputime_jiffies_factor;
48 DECLARE_PER_CPU(unsigned long, cputime_last_delta);
49 DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
51 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
53 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
56 /* Estimate the scaled cputime by scaling the real cputime based on
57 * the last scaled to real ratio */
58 static inline cputime_t cputime_to_scaled(const cputime_t ct)
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);
68 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
73 /* have to be a little careful about overflow */
77 ct *= tb_ticks_per_sec;
81 ct += (cputime_t) sec * tb_ticks_per_sec;
82 return (__force cputime_t) ct;
85 static inline void setup_cputime_one_jiffy(void)
87 cputime_one_jiffy = jiffies_to_cputime(1);
90 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
95 /* have to be a little careful about overflow */
99 ct *= tb_ticks_per_sec;
103 ct += (u64) sec * tb_ticks_per_sec;
104 return (__force cputime64_t) ct;
107 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
109 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
113 * Convert cputime <-> microseconds
115 extern u64 __cputime_usec_factor;
117 static inline unsigned long cputime_to_usecs(const cputime_t ct)
119 return mulhdu((__force u64) ct, __cputime_usec_factor);
122 static inline cputime_t usecs_to_cputime(const unsigned long us)
127 /* have to be a little careful about overflow */
131 ct *= tb_ticks_per_sec;
135 ct += (cputime_t) sec * tb_ticks_per_sec;
136 return (__force cputime_t) ct;
139 #define usecs_to_cputime64(us) usecs_to_cputime(us)
142 * Convert cputime <-> seconds
144 extern u64 __cputime_sec_factor;
146 static inline unsigned long cputime_to_secs(const cputime_t ct)
148 return mulhdu((__force u64) ct, __cputime_sec_factor);
151 static inline cputime_t secs_to_cputime(const unsigned long sec)
153 return (__force cputime_t)((u64) sec * tb_ticks_per_sec);
157 * Convert cputime <-> timespec
159 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
161 u64 x = (__force u64) ct;
164 frac = do_div(x, tb_ticks_per_sec);
166 x = (u64) frac * 1000000000;
167 do_div(x, tb_ticks_per_sec);
171 static inline cputime_t timespec_to_cputime(const struct timespec *p)
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);
181 * Convert cputime <-> timeval
183 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
185 u64 x = (__force u64) ct;
188 frac = do_div(x, tb_ticks_per_sec);
190 x = (u64) frac * 1000000;
191 do_div(x, tb_ticks_per_sec);
195 static inline cputime_t timeval_to_cputime(const struct timeval *p)
199 ct = (u64) p->tv_usec * tb_ticks_per_sec;
201 return (__force cputime_t)(ct + (u64) p->tv_sec * tb_ticks_per_sec);
205 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
207 extern u64 __cputime_clockt_factor;
209 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
211 return mulhdu((__force u64) ct, __cputime_clockt_factor);
214 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
219 /* have to be a little careful about overflow */
223 ct *= tb_ticks_per_sec;
227 ct += (u64) sec * tb_ticks_per_sec;
228 return (__force cputime_t) ct;
231 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
233 static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
235 #endif /* __KERNEL__ */
236 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
237 #endif /* __POWERPC_CPUTIME_H */