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/*
* Definitions for measuring cputime in nsecs resolution.
*
* Based on <arch/ia64/include/asm/cputime.h>
*
* Copyright (C) 2007 FUJITSU LIMITED
* Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
*/
#ifndef _ASM_GENERIC_CPUTIME_NSECS_H
#define _ASM_GENERIC_CPUTIME_NSECS_H
#include <linux/math64.h>
typedef u64 __nocast cputime_t;
typedef u64 __nocast cputime64_t;
#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
#define cputime_one_jiffy jiffies_to_cputime(1)
#define cputime_div(__ct, divisor) div_u64((__force u64)__ct, divisor)
#define cputime_div_rem(__ct, divisor, remainder) \
div_u64_rem((__force u64)__ct, divisor, remainder);
/*
* Convert cputime <-> jiffies (HZ)
*/
#define cputime_to_jiffies(__ct) \
cputime_div(__ct, NSEC_PER_SEC / HZ)
#define cputime_to_scaled(__ct) (__ct)
#define jiffies_to_cputime(__jif) \
(__force cputime_t)((__jif) * (NSEC_PER_SEC / HZ))
#define cputime64_to_jiffies64(__ct) \
cputime_div(__ct, NSEC_PER_SEC / HZ)
#define jiffies64_to_cputime64(__jif) \
(__force cputime64_t)((__jif) * (NSEC_PER_SEC / HZ))
/*
* Convert cputime <-> nanoseconds
*/
#define cputime_to_nsecs(__ct) \
(__force u64)(__ct)
#define nsecs_to_cputime(__nsecs) \
(__force cputime_t)(__nsecs)
/*
* Convert cputime <-> microseconds
*/
#define cputime_to_usecs(__ct) \
cputime_div(__ct, NSEC_PER_USEC)
#define usecs_to_cputime(__usecs) \
(__force cputime_t)((__usecs) * NSEC_PER_USEC)
#define usecs_to_cputime64(__usecs) \
(__force cputime64_t)((__usecs) * NSEC_PER_USEC)
/*
* Convert cputime <-> seconds
*/
#define cputime_to_secs(__ct) \
cputime_div(__ct, NSEC_PER_SEC)
#define secs_to_cputime(__secs) \
(__force cputime_t)((__secs) * NSEC_PER_SEC)
/*
* Convert cputime <-> timespec (nsec)
*/
static inline cputime_t timespec_to_cputime(const struct timespec *val)
{
u64 ret = (u64)val->tv_sec * NSEC_PER_SEC + val->tv_nsec;
return (__force cputime_t) ret;
}
static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
{
u32 rem;
val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
val->tv_nsec = rem;
}
/*
* Convert cputime <-> timeval (msec)
*/
static inline cputime_t timeval_to_cputime(const struct timeval *val)
{
u64 ret = (u64)val->tv_sec * NSEC_PER_SEC +
val->tv_usec * NSEC_PER_USEC;
return (__force cputime_t) ret;
}
static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
{
u32 rem;
val->tv_sec = cputime_div_rem(ct, NSEC_PER_SEC, &rem);
val->tv_usec = rem / NSEC_PER_USEC;
}
/*
* Convert cputime <-> clock (USER_HZ)
*/
#define cputime_to_clock_t(__ct) \
cputime_div(__ct, (NSEC_PER_SEC / USER_HZ))
#define clock_t_to_cputime(__x) \
(__force cputime_t)((__x) * (NSEC_PER_SEC / USER_HZ))
/*
* Convert cputime64 to clock.
*/
#define cputime64_to_clock_t(__ct) \
cputime_to_clock_t((__force cputime_t)__ct)
#endif