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[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-powerpc / cputime.h
blob310804485208d49b8f0a5438c33e04186dd2c70d
1 /*
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>
21 #else
23 #include <linux/types.h>
24 #include <linux/time.h>
25 #include <asm/div64.h>
26 #include <asm/time.h>
27 #include <asm/param.h>
29 typedef u64 cputime_t;
30 typedef u64 cputime64_t;
32 #define cputime_zero ((cputime_t)0)
33 #define cputime_max ((~((cputime_t)0) >> 1) - 1)
34 #define cputime_add(__a, __b) ((__a) + (__b))
35 #define cputime_sub(__a, __b) ((__a) - (__b))
36 #define cputime_div(__a, __n) ((__a) / (__n))
37 #define cputime_halve(__a) ((__a) >> 1)
38 #define cputime_eq(__a, __b) ((__a) == (__b))
39 #define cputime_gt(__a, __b) ((__a) > (__b))
40 #define cputime_ge(__a, __b) ((__a) >= (__b))
41 #define cputime_lt(__a, __b) ((__a) < (__b))
42 #define cputime_le(__a, __b) ((__a) <= (__b))
44 #define cputime64_zero ((cputime64_t)0)
45 #define cputime64_add(__a, __b) ((__a) + (__b))
46 #define cputime64_sub(__a, __b) ((__a) - (__b))
47 #define cputime_to_cputime64(__ct) (__ct)
49 #ifdef __KERNEL__
52 * Convert cputime <-> jiffies
54 extern u64 __cputime_jiffies_factor;
56 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
58 return mulhdu(ct, __cputime_jiffies_factor);
61 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
63 cputime_t ct;
64 unsigned long sec;
66 /* have to be a little careful about overflow */
67 ct = jif % HZ;
68 sec = jif / HZ;
69 if (ct) {
70 ct *= tb_ticks_per_sec;
71 do_div(ct, HZ);
73 if (sec)
74 ct += (cputime_t) sec * tb_ticks_per_sec;
75 return ct;
78 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
80 cputime_t ct;
81 u64 sec;
83 /* have to be a little careful about overflow */
84 ct = jif % HZ;
85 sec = jif / HZ;
86 if (ct) {
87 ct *= tb_ticks_per_sec;
88 do_div(ct, HZ);
90 if (sec)
91 ct += (cputime_t) sec * tb_ticks_per_sec;
92 return ct;
95 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
97 return mulhdu(ct, __cputime_jiffies_factor);
101 * Convert cputime <-> milliseconds
103 extern u64 __cputime_msec_factor;
105 static inline unsigned long cputime_to_msecs(const cputime_t ct)
107 return mulhdu(ct, __cputime_msec_factor);
110 static inline cputime_t msecs_to_cputime(const unsigned long ms)
112 cputime_t ct;
113 unsigned long sec;
115 /* have to be a little careful about overflow */
116 ct = ms % 1000;
117 sec = ms / 1000;
118 if (ct) {
119 ct *= tb_ticks_per_sec;
120 do_div(ct, 1000);
122 if (sec)
123 ct += (cputime_t) sec * tb_ticks_per_sec;
124 return ct;
128 * Convert cputime <-> seconds
130 extern u64 __cputime_sec_factor;
132 static inline unsigned long cputime_to_secs(const cputime_t ct)
134 return mulhdu(ct, __cputime_sec_factor);
137 static inline cputime_t secs_to_cputime(const unsigned long sec)
139 return (cputime_t) sec * tb_ticks_per_sec;
143 * Convert cputime <-> timespec
145 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
147 u64 x = ct;
148 unsigned int frac;
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;
157 static inline cputime_t timespec_to_cputime(const struct timespec *p)
159 cputime_t ct;
161 ct = (u64) p->tv_nsec * tb_ticks_per_sec;
162 do_div(ct, 1000000000);
163 return ct + (u64) p->tv_sec * tb_ticks_per_sec;
167 * Convert cputime <-> timeval
169 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
171 u64 x = ct;
172 unsigned int frac;
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;
181 static inline cputime_t timeval_to_cputime(const struct timeval *p)
183 cputime_t ct;
185 ct = (u64) p->tv_usec * tb_ticks_per_sec;
186 do_div(ct, 1000000);
187 return ct + (u64) p->tv_sec * tb_ticks_per_sec;
191 * Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
193 extern u64 __cputime_clockt_factor;
195 static inline unsigned long cputime_to_clock_t(const cputime_t ct)
197 return mulhdu(ct, __cputime_clockt_factor);
200 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
202 cputime_t ct;
203 unsigned long sec;
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);
212 if (sec)
213 ct += (cputime_t) sec * tb_ticks_per_sec;
214 return ct;
217 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
219 #endif /* __KERNEL__ */
220 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
221 #endif /* __POWERPC_CPUTIME_H */