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, 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
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 cputime_t;
33 typedef u64 cputime64_t;
35 #define cputime_zero ((cputime_t)0)
36 #define cputime_max ((~((cputime_t)0) >> 1) - 1)
37 #define cputime_add(__a, __b) ((__a) + (__b))
38 #define cputime_sub(__a, __b) ((__a) - (__b))
39 #define cputime_div(__a, __n) ((__a) / (__n))
40 #define cputime_halve(__a) ((__a) >> 1)
41 #define cputime_eq(__a, __b) ((__a) == (__b))
42 #define cputime_gt(__a, __b) ((__a) > (__b))
43 #define cputime_ge(__a, __b) ((__a) >= (__b))
44 #define cputime_lt(__a, __b) ((__a) < (__b))
45 #define cputime_le(__a, __b) ((__a) <= (__b))
47 #define cputime64_zero ((cputime64_t)0)
48 #define cputime64_add(__a, __b) ((__a) + (__b))
49 #define cputime64_sub(__a, __b) ((__a) - (__b))
50 #define cputime_to_cputime64(__ct) (__ct)
55 * One jiffy in timebase units computed during initialization
57 extern cputime_t cputime_one_jiffy;
60 * Convert cputime <-> jiffies
62 extern u64 __cputime_jiffies_factor;
63 DECLARE_PER_CPU(unsigned long, cputime_last_delta);
64 DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
66 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
68 return mulhdu(ct, __cputime_jiffies_factor);
71 /* Estimate the scaled cputime by scaling the real cputime based on
72 * the last scaled to real ratio */
73 static inline cputime_t cputime_to_scaled(const cputime_t ct)
75 if (cpu_has_feature(CPU_FTR_SPURR) &&
76 __get_cpu_var(cputime_last_delta))
77 return ct * __get_cpu_var(cputime_scaled_last_delta) /
78 __get_cpu_var(cputime_last_delta);
82 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
87 /* have to be a little careful about overflow */
91 ct *= tb_ticks_per_sec;
95 ct += (cputime_t) sec * tb_ticks_per_sec;
99 static inline void setup_cputime_one_jiffy(void)
101 cputime_one_jiffy = jiffies_to_cputime(1);
104 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
109 /* have to be a little careful about overflow */
113 ct *= tb_ticks_per_sec;
117 ct += (cputime_t) sec * tb_ticks_per_sec;
121 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
123 return mulhdu(ct, __cputime_jiffies_factor);
127 * Convert cputime <-> microseconds
129 extern u64 __cputime_msec_factor;
131 static inline unsigned long cputime_to_usecs(const cputime_t ct)
133 return mulhdu(ct, __cputime_msec_factor) * USEC_PER_MSEC;
136 static inline cputime_t usecs_to_cputime(const unsigned long us)
141 /* have to be a little careful about overflow */
145 ct *= tb_ticks_per_sec;
149 ct += (cputime_t) sec * tb_ticks_per_sec;
154 * Convert cputime <-> seconds
156 extern u64 __cputime_sec_factor;
158 static inline unsigned long cputime_to_secs(const cputime_t ct)
160 return mulhdu(ct, __cputime_sec_factor);
163 static inline cputime_t secs_to_cputime(const unsigned long sec)
165 return (cputime_t) sec * tb_ticks_per_sec;
169 * Convert cputime <-> timespec
171 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
176 frac = do_div(x, tb_ticks_per_sec);
178 x = (u64) frac * 1000000000;
179 do_div(x, tb_ticks_per_sec);
183 static inline cputime_t timespec_to_cputime(const struct timespec *p)
187 ct = (u64) p->tv_nsec * tb_ticks_per_sec;
188 do_div(ct, 1000000000);
189 return ct + (u64) p->tv_sec * tb_ticks_per_sec;
193 * Convert cputime <-> timeval
195 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
200 frac = do_div(x, tb_ticks_per_sec);
202 x = (u64) frac * 1000000;
203 do_div(x, tb_ticks_per_sec);
207 static inline cputime_t timeval_to_cputime(const struct timeval *p)
211 ct = (u64) p->tv_usec * tb_ticks_per_sec;
213 return ct + (u64) p->tv_sec * tb_ticks_per_sec;
217 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
219 extern u64 __cputime_clockt_factor;
221 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
223 return mulhdu(ct, __cputime_clockt_factor);
226 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
231 /* have to be a little careful about overflow */
235 ct *= tb_ticks_per_sec;
239 ct += (cputime_t) sec * tb_ticks_per_sec;
243 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
245 #endif /* __KERNEL__ */
246 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
247 #endif /* __POWERPC_CPUTIME_H */