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>
31 #include <asm/cpu_has_feature.h>
33 typedef u64 __nocast cputime_t;
34 typedef u64 __nocast cputime64_t;
36 #define cmpxchg_cputime(ptr, old, new) cmpxchg(ptr, old, new)
41 * One jiffy in timebase units computed during initialization
43 extern cputime_t cputime_one_jiffy;
46 * Convert cputime <-> jiffies
48 extern u64 __cputime_jiffies_factor;
50 static inline unsigned long cputime_to_jiffies(const cputime_t ct)
52 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
55 static inline cputime_t jiffies_to_cputime(const unsigned long jif)
60 /* have to be a little careful about overflow */
64 ct *= tb_ticks_per_sec;
68 ct += (cputime_t) sec * tb_ticks_per_sec;
69 return (__force cputime_t) ct;
72 static inline void setup_cputime_one_jiffy(void)
74 cputime_one_jiffy = jiffies_to_cputime(1);
77 static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
82 /* have to be a little careful about overflow */
85 ct *= tb_ticks_per_sec;
89 ct += (u64) sec * tb_ticks_per_sec;
90 return (__force cputime64_t) ct;
93 static inline u64 cputime64_to_jiffies64(const cputime_t ct)
95 return mulhdu((__force u64) ct, __cputime_jiffies_factor);
99 * Convert cputime <-> microseconds
101 extern u64 __cputime_usec_factor;
103 static inline unsigned long cputime_to_usecs(const cputime_t ct)
105 return mulhdu((__force u64) ct, __cputime_usec_factor);
108 static inline cputime_t usecs_to_cputime(const unsigned long us)
113 /* have to be a little careful about overflow */
117 ct *= tb_ticks_per_sec;
121 ct += (cputime_t) sec * tb_ticks_per_sec;
122 return (__force cputime_t) ct;
125 #define usecs_to_cputime64(us) usecs_to_cputime(us)
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((__force u64) ct, __cputime_sec_factor);
137 static inline cputime_t secs_to_cputime(const unsigned long sec)
139 return (__force cputime_t)((u64) 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 = (__force u64) ct;
150 frac = do_div(x, tb_ticks_per_sec);
152 x = (u64) frac * 1000000000;
153 do_div(x, tb_ticks_per_sec);
157 static inline cputime_t timespec_to_cputime(const struct timespec *p)
161 ct = (u64) p->tv_nsec * tb_ticks_per_sec;
162 do_div(ct, 1000000000);
163 return (__force cputime_t)(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 = (__force u64) ct;
174 frac = do_div(x, tb_ticks_per_sec);
176 x = (u64) frac * 1000000;
177 do_div(x, tb_ticks_per_sec);
181 static inline cputime_t timeval_to_cputime(const struct timeval *p)
185 ct = (u64) p->tv_usec * tb_ticks_per_sec;
187 return (__force cputime_t)(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((__force u64) ct, __cputime_clockt_factor);
200 static inline cputime_t clock_t_to_cputime(const unsigned long clk)
205 /* have to be a little careful about overflow */
209 ct *= tb_ticks_per_sec;
213 ct += (u64) sec * tb_ticks_per_sec;
214 return (__force cputime_t) ct;
217 #define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
220 * PPC64 uses PACA which is task independent for storing accounting data while
221 * PPC32 uses struct thread_info, therefore at task switch the accounting data
222 * has to be populated in the new task
225 static inline void arch_vtime_task_switch(struct task_struct *tsk) { }
227 void arch_vtime_task_switch(struct task_struct *tsk);
230 #endif /* __KERNEL__ */
231 #endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
232 #endif /* __POWERPC_CPUTIME_H */