text: /*
   * 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
  