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Linux/arch/ia64/include/asm/cputime.h

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  1 /*
  2  * Definitions for measuring cputime on ia64 machines.
  3  *
  4  * Based on <asm-powerpc/cputime.h>.
  5  *
  6  * Copyright (C) 2007 FUJITSU LIMITED
  7  * Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
  8  *
  9  * This program is free software; you can redistribute it and/or
 10  * modify it under the terms of the GNU General Public License
 11  * as published by the Free Software Foundation; either version
 12  * 2 of the License, or (at your option) any later version.
 13  *
 14  * If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in nsec.
 15  * Otherwise we measure cpu time in jiffies using the generic definitions.
 16  */
 17 
 18 #ifndef __IA64_CPUTIME_H
 19 #define __IA64_CPUTIME_H
 20 
 21 #ifndef CONFIG_VIRT_CPU_ACCOUNTING
 22 #include <asm-generic/cputime.h>
 23 #else
 24 
 25 #include <linux/time.h>
 26 #include <linux/jiffies.h>
 27 #include <asm/processor.h>
 28 
 29 typedef u64 __nocast cputime_t;
 30 typedef u64 __nocast cputime64_t;
 31 
 32 #define cputime_one_jiffy               jiffies_to_cputime(1)
 33 
 34 /*
 35  * Convert cputime <-> jiffies (HZ)
 36  */
 37 #define cputime_to_jiffies(__ct)        \
 38         ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
 39 #define jiffies_to_cputime(__jif)       \
 40         (__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
 41 #define cputime64_to_jiffies64(__ct)    \
 42         ((__force u64)(__ct) / (NSEC_PER_SEC / HZ))
 43 #define jiffies64_to_cputime64(__jif)   \
 44         (__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
 45 
 46 /*
 47  * Convert cputime <-> microseconds
 48  */
 49 #define cputime_to_usecs(__ct)          \
 50         ((__force u64)(__ct) / NSEC_PER_USEC)
 51 #define usecs_to_cputime(__usecs)       \
 52         (__force cputime_t)((__usecs) * NSEC_PER_USEC)
 53 #define usecs_to_cputime64(__usecs)     \
 54         (__force cputime64_t)((__usecs) * NSEC_PER_USEC)
 55 
 56 /*
 57  * Convert cputime <-> seconds
 58  */
 59 #define cputime_to_secs(__ct)           \
 60         ((__force u64)(__ct) / NSEC_PER_SEC)
 61 #define secs_to_cputime(__secs)         \
 62         (__force cputime_t)((__secs) * NSEC_PER_SEC)
 63 
 64 /*
 65  * Convert cputime <-> timespec (nsec)
 66  */
 67 static inline cputime_t timespec_to_cputime(const struct timespec *val)
 68 {
 69         u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
 70         return (__force cputime_t) ret;
 71 }
 72 static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
 73 {
 74         val->tv_sec  = (__force u64) ct / NSEC_PER_SEC;
 75         val->tv_nsec = (__force u64) ct % NSEC_PER_SEC;
 76 }
 77 
 78 /*
 79  * Convert cputime <-> timeval (msec)
 80  */
 81 static inline cputime_t timeval_to_cputime(struct timeval *val)
 82 {
 83         u64 ret = val->tv_sec * NSEC_PER_SEC + val->tv_usec * NSEC_PER_USEC;
 84         return (__force cputime_t) ret;
 85 }
 86 static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
 87 {
 88         val->tv_sec = (__force u64) ct / NSEC_PER_SEC;
 89         val->tv_usec = ((__force u64) ct % NSEC_PER_SEC) / NSEC_PER_USEC;
 90 }
 91 
 92 /*
 93  * Convert cputime <-> clock (USER_HZ)
 94  */
 95 #define cputime_to_clock_t(__ct)        \
 96         ((__force u64)(__ct) / (NSEC_PER_SEC / USER_HZ))
 97 #define clock_t_to_cputime(__x)         \
 98         (__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
 99 
100 /*
101  * Convert cputime64 to clock.
102  */
103 #define cputime64_to_clock_t(__ct)      \
104         cputime_to_clock_t((__force cputime_t)__ct)
105 
106 extern void arch_vtime_task_switch(struct task_struct *tsk);
107 
108 #endif /* CONFIG_VIRT_CPU_ACCOUNTING */
109 #endif /* __IA64_CPUTIME_H */
110 

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