mirror of https://gitee.com/openkylin/linux.git
149 lines
3.8 KiB
C
149 lines
3.8 KiB
C
/*
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* Copyright IBM Corp. 2004
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*
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* Author: Martin Schwidefsky <schwidefsky@de.ibm.com>
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*/
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#ifndef _S390_CPUTIME_H
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#define _S390_CPUTIME_H
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#include <linux/types.h>
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#include <asm/div64.h>
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#define CPUTIME_PER_USEC 4096ULL
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#define CPUTIME_PER_SEC (CPUTIME_PER_USEC * USEC_PER_SEC)
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/* We want to use full resolution of the CPU timer: 2**-12 micro-seconds. */
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typedef unsigned long long __nocast cputime_t;
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typedef unsigned long long __nocast cputime64_t;
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#define cmpxchg_cputime(ptr, old, new) cmpxchg64(ptr, old, new)
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static inline unsigned long __div(unsigned long long n, unsigned long base)
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{
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return n / base;
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}
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#define cputime_one_jiffy jiffies_to_cputime(1)
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/*
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* Convert cputime to jiffies and back.
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*/
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static inline unsigned long cputime_to_jiffies(const cputime_t cputime)
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{
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return __div((__force unsigned long long) cputime, CPUTIME_PER_SEC / HZ);
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}
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static inline cputime_t jiffies_to_cputime(const unsigned int jif)
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{
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return (__force cputime_t)(jif * (CPUTIME_PER_SEC / HZ));
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}
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static inline u64 cputime64_to_jiffies64(cputime64_t cputime)
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{
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unsigned long long jif = (__force unsigned long long) cputime;
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do_div(jif, CPUTIME_PER_SEC / HZ);
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return jif;
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}
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static inline cputime64_t jiffies64_to_cputime64(const u64 jif)
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{
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return (__force cputime64_t)(jif * (CPUTIME_PER_SEC / HZ));
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}
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/*
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* Convert cputime to microseconds and back.
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*/
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static inline unsigned int cputime_to_usecs(const cputime_t cputime)
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{
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return (__force unsigned long long) cputime >> 12;
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}
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static inline cputime_t usecs_to_cputime(const unsigned int m)
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{
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return (__force cputime_t)(m * CPUTIME_PER_USEC);
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}
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#define usecs_to_cputime64(m) usecs_to_cputime(m)
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/*
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* Convert cputime to milliseconds and back.
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*/
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static inline unsigned int cputime_to_secs(const cputime_t cputime)
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{
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return __div((__force unsigned long long) cputime, CPUTIME_PER_SEC / 2) >> 1;
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}
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static inline cputime_t secs_to_cputime(const unsigned int s)
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{
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return (__force cputime_t)(s * CPUTIME_PER_SEC);
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}
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/*
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* Convert cputime to timespec and back.
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*/
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static inline cputime_t timespec_to_cputime(const struct timespec *value)
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{
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unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC;
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return (__force cputime_t)(ret + __div(value->tv_nsec * CPUTIME_PER_USEC, NSEC_PER_USEC));
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}
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static inline void cputime_to_timespec(const cputime_t cputime,
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struct timespec *value)
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{
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unsigned long long __cputime = (__force unsigned long long) cputime;
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value->tv_nsec = (__cputime % CPUTIME_PER_SEC) * NSEC_PER_USEC / CPUTIME_PER_USEC;
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value->tv_sec = __cputime / CPUTIME_PER_SEC;
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}
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/*
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* Convert cputime to timeval and back.
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* Since cputime and timeval have the same resolution (microseconds)
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* this is easy.
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*/
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static inline cputime_t timeval_to_cputime(const struct timeval *value)
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{
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unsigned long long ret = value->tv_sec * CPUTIME_PER_SEC;
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return (__force cputime_t)(ret + value->tv_usec * CPUTIME_PER_USEC);
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}
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static inline void cputime_to_timeval(const cputime_t cputime,
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struct timeval *value)
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{
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unsigned long long __cputime = (__force unsigned long long) cputime;
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value->tv_usec = (__cputime % CPUTIME_PER_SEC) / CPUTIME_PER_USEC;
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value->tv_sec = __cputime / CPUTIME_PER_SEC;
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}
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/*
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* Convert cputime to clock and back.
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*/
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static inline clock_t cputime_to_clock_t(cputime_t cputime)
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{
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unsigned long long clock = (__force unsigned long long) cputime;
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do_div(clock, CPUTIME_PER_SEC / USER_HZ);
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return clock;
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}
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static inline cputime_t clock_t_to_cputime(unsigned long x)
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{
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return (__force cputime_t)(x * (CPUTIME_PER_SEC / USER_HZ));
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}
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/*
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* Convert cputime64 to clock.
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*/
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static inline clock_t cputime64_to_clock_t(cputime64_t cputime)
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{
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unsigned long long clock = (__force unsigned long long) cputime;
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do_div(clock, CPUTIME_PER_SEC / USER_HZ);
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return clock;
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}
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cputime64_t arch_cpu_idle_time(int cpu);
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#define arch_idle_time(cpu) arch_cpu_idle_time(cpu)
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#endif /* _S390_CPUTIME_H */
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