248 lines
5.6 KiB
C
248 lines
5.6 KiB
C
/*
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* Definitions for measuring cputime on powerpc machines.
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*
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* Copyright (C) 2006 Paul Mackerras, IBM Corp.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in
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* the same units as the timebase. Otherwise we measure cpu time
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* in jiffies using the generic definitions.
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*/
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#ifndef __POWERPC_CPUTIME_H
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#define __POWERPC_CPUTIME_H
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#ifndef CONFIG_VIRT_CPU_ACCOUNTING
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#include <asm-generic/cputime.h>
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#ifdef __KERNEL__
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static inline void setup_cputime_one_jiffy(void) { }
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#endif
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#else
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#include <linux/types.h>
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#include <linux/time.h>
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#include <asm/div64.h>
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#include <asm/time.h>
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#include <asm/param.h>
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typedef u64 cputime_t;
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typedef u64 cputime64_t;
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#define cputime_zero ((cputime_t)0)
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#define cputime_max ((~((cputime_t)0) >> 1) - 1)
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#define cputime_add(__a, __b) ((__a) + (__b))
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#define cputime_sub(__a, __b) ((__a) - (__b))
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#define cputime_div(__a, __n) ((__a) / (__n))
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#define cputime_halve(__a) ((__a) >> 1)
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#define cputime_eq(__a, __b) ((__a) == (__b))
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#define cputime_gt(__a, __b) ((__a) > (__b))
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#define cputime_ge(__a, __b) ((__a) >= (__b))
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#define cputime_lt(__a, __b) ((__a) < (__b))
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#define cputime_le(__a, __b) ((__a) <= (__b))
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#define cputime64_zero ((cputime64_t)0)
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#define cputime64_add(__a, __b) ((__a) + (__b))
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#define cputime64_sub(__a, __b) ((__a) - (__b))
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#define cputime_to_cputime64(__ct) (__ct)
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#ifdef __KERNEL__
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/*
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* One jiffy in timebase units computed during initialization
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*/
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extern cputime_t cputime_one_jiffy;
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/*
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* Convert cputime <-> jiffies
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*/
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extern u64 __cputime_jiffies_factor;
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DECLARE_PER_CPU(unsigned long, cputime_last_delta);
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DECLARE_PER_CPU(unsigned long, cputime_scaled_last_delta);
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static inline unsigned long cputime_to_jiffies(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_jiffies_factor);
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}
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/* Estimate the scaled cputime by scaling the real cputime based on
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* the last scaled to real ratio */
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static inline cputime_t cputime_to_scaled(const cputime_t ct)
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{
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if (cpu_has_feature(CPU_FTR_SPURR) &&
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__get_cpu_var(cputime_last_delta))
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return ct * __get_cpu_var(cputime_scaled_last_delta) /
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__get_cpu_var(cputime_last_delta);
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return ct;
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}
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static inline cputime_t jiffies_to_cputime(const unsigned long jif)
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{
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cputime_t ct;
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unsigned long sec;
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/* have to be a little careful about overflow */
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ct = jif % HZ;
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sec = jif / HZ;
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if (ct) {
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ct *= tb_ticks_per_sec;
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do_div(ct, HZ);
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}
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if (sec)
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ct += (cputime_t) sec * tb_ticks_per_sec;
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return ct;
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}
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static inline void setup_cputime_one_jiffy(void)
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{
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cputime_one_jiffy = jiffies_to_cputime(1);
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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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cputime_t ct;
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u64 sec;
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/* have to be a little careful about overflow */
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ct = jif % HZ;
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sec = jif / HZ;
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if (ct) {
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ct *= tb_ticks_per_sec;
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do_div(ct, HZ);
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}
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if (sec)
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ct += (cputime_t) sec * tb_ticks_per_sec;
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return ct;
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}
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static inline u64 cputime64_to_jiffies64(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_jiffies_factor);
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}
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/*
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* Convert cputime <-> microseconds
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*/
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extern u64 __cputime_msec_factor;
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static inline unsigned long cputime_to_usecs(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_msec_factor) * USEC_PER_MSEC;
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}
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static inline cputime_t usecs_to_cputime(const unsigned long us)
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{
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cputime_t ct;
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unsigned long sec;
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/* have to be a little careful about overflow */
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ct = us % 1000000;
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sec = us / 1000000;
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if (ct) {
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ct *= tb_ticks_per_sec;
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do_div(ct, 1000);
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}
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if (sec)
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ct += (cputime_t) sec * tb_ticks_per_sec;
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return ct;
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}
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/*
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* Convert cputime <-> seconds
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*/
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extern u64 __cputime_sec_factor;
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static inline unsigned long cputime_to_secs(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_sec_factor);
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}
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static inline cputime_t secs_to_cputime(const unsigned long sec)
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{
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return (cputime_t) sec * tb_ticks_per_sec;
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}
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/*
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* Convert cputime <-> timespec
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*/
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static inline void cputime_to_timespec(const cputime_t ct, struct timespec *p)
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{
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u64 x = ct;
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unsigned int frac;
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frac = do_div(x, tb_ticks_per_sec);
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p->tv_sec = x;
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x = (u64) frac * 1000000000;
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do_div(x, tb_ticks_per_sec);
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p->tv_nsec = x;
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}
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static inline cputime_t timespec_to_cputime(const struct timespec *p)
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{
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cputime_t ct;
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ct = (u64) p->tv_nsec * tb_ticks_per_sec;
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do_div(ct, 1000000000);
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return ct + (u64) p->tv_sec * tb_ticks_per_sec;
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}
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/*
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* Convert cputime <-> timeval
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*/
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static inline void cputime_to_timeval(const cputime_t ct, struct timeval *p)
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{
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u64 x = ct;
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unsigned int frac;
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frac = do_div(x, tb_ticks_per_sec);
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p->tv_sec = x;
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x = (u64) frac * 1000000;
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do_div(x, tb_ticks_per_sec);
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p->tv_usec = x;
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}
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static inline cputime_t timeval_to_cputime(const struct timeval *p)
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{
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cputime_t ct;
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ct = (u64) p->tv_usec * tb_ticks_per_sec;
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do_div(ct, 1000000);
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return ct + (u64) p->tv_sec * tb_ticks_per_sec;
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}
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/*
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* Convert cputime <-> clock_t (units of 1/USER_HZ seconds)
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*/
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extern u64 __cputime_clockt_factor;
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static inline unsigned long cputime_to_clock_t(const cputime_t ct)
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{
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return mulhdu(ct, __cputime_clockt_factor);
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}
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static inline cputime_t clock_t_to_cputime(const unsigned long clk)
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{
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cputime_t ct;
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unsigned long sec;
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/* have to be a little careful about overflow */
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ct = clk % USER_HZ;
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sec = clk / USER_HZ;
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if (ct) {
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ct *= tb_ticks_per_sec;
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do_div(ct, USER_HZ);
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}
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if (sec)
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ct += (cputime_t) sec * tb_ticks_per_sec;
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return ct;
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}
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#define cputime64_to_clock_t(ct) cputime_to_clock_t((cputime_t)(ct))
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#endif /* __KERNEL__ */
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#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
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#endif /* __POWERPC_CPUTIME_H */
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