gem5/src/base/time.hh
Ali Saidi 3876105bdb ARM: Add RTC device for ARM platforms.
This change implements a PL031 real time clock.

--HG--
rename : src/dev/arm/timer_sp804.cc => src/dev/arm/rtc_pl031.cc
rename : src/dev/arm/timer_sp804.hh => src/dev/arm/rtc_pl031.hh
2012-03-01 17:26:31 -06:00

273 lines
6.7 KiB
C++

/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* Authors: Steve Reinhardt
* Nathan Binkert
*/
#ifndef __BASE_TIME_HH__
#define __BASE_TIME_HH__
#include <sys/time.h>
#include <inttypes.h>
#include <cmath>
#include <cstring>
#include <ctime>
#include <iosfwd>
#include <iostream>
#include <string>
#include "base/types.hh"
class Checkpoint;
class Time
{
protected:
timespec _time;
/**
* Internal time set function
*/
void _set(bool monotonic);
public:
static const long NSEC_PER_SEC = 1000 * 1000 * 1000;
static const long NSEC_PER_MSEC = 1000 * 1000;
static const long NSEC_PER_USEC = 1000;
public:
explicit Time() { clear(); }
explicit Time(double sec) { operator=(sec); }
Time(const Time &val) : _time(val._time) { }
Time(uint64_t sec, uint64_t nsec) { set(sec, nsec); }
Time(const timeval &tv) { operator=(tv); }
Time(const timespec &ts) { operator=(ts); }
/**
* Accessors for getting and setting the current clock
*/
time_t sec() const { return _time.tv_sec; }
long msec() const { return _time.tv_nsec / NSEC_PER_MSEC; }
long usec() const { return _time.tv_nsec / NSEC_PER_USEC; }
long nsec() const { return _time.tv_nsec; }
void sec(time_t sec) { _time.tv_sec = sec; }
void msec(long msec) { _time.tv_nsec = msec * NSEC_PER_MSEC; }
void usec(long usec) { _time.tv_nsec = usec * NSEC_PER_USEC; }
void nsec(long nsec) { _time.tv_nsec = nsec; }
/**
* Clear the time
*/
void clear() { memset(&_time, 0, sizeof(_time)); }
/**
* Use this to set time for the purposes of time measurement (use
* a monotonic clock if it is available
*/
void setTimer() { _set(true); }
/**
* Use this to set the time to the actual current time
*/
void setWallclock() { _set(false); }
/**
* Set the current time
*/
void set(time_t _sec, long _nsec) { sec(_sec); nsec(_nsec); }
/**
* Set the current time from a value measured in Ticks
* @param ticks Number of ticks to convert into a time.
*/
void setTick(Tick ticks);
/**
* Get the current time from a value measured in Ticks
* @return Time value measured in Ticks.
*/
Tick getTick() const;
const Time &
operator=(const Time &other)
{
sec(other.sec());
nsec(other.nsec());
return *this;
}
const Time &
operator=(double new_time)
{
double seconds = floor(new_time);
sec((time_t)seconds);
nsec((long)((seconds - new_time) * 1e9));
return *this;
}
const Time &
operator=(const timeval &tv)
{
sec(tv.tv_sec);
nsec(tv.tv_usec * 1000);
return *this;
}
const Time &
operator=(const timespec &ts)
{
sec(ts.tv_sec);
nsec(ts.tv_nsec);
return *this;
}
/**
* Get the time in floating point seconds
*/
operator double() const
{
return (double)sec() + ((double)nsec()) * 1e-9;
}
/**
* operators for time conversion
*/
operator timespec() const { return _time; }
operator timeval() const
{
timeval tv;
tv.tv_sec = sec();
tv.tv_usec = usec();
return tv;
}
const Time &
operator+=(const Time &other)
{
_time.tv_sec += other.sec();
_time.tv_nsec += other.nsec();
if (_time.tv_nsec > NSEC_PER_SEC) {
_time.tv_sec++;
_time.tv_nsec -= NSEC_PER_SEC;
}
return *this;
}
const Time &
operator-=(const Time &other)
{
_time.tv_sec -= other.sec();
_time.tv_nsec -= other.nsec();
if (_time.tv_nsec < 0) {
_time.tv_sec--;
_time.tv_nsec += NSEC_PER_SEC;
}
return *this;
}
std::string date(const std::string &format = "") const;
std::string time() const;
void serialize(const std::string &base, std::ostream &os);
void unserialize(const std::string &base, Checkpoint *cp,
const std::string &section);
};
void sleep(const Time &time);
inline bool
operator==(const Time &l, const Time &r)
{
return l.sec() == r.sec() && l.nsec() == r.nsec();
}
inline bool
operator!=(const Time &l, const Time &r)
{
return l.sec() != r.sec() || l.nsec() != r.nsec();
}
inline bool
operator<(const Time &l, const Time &r)
{
return (l.sec() < r.sec()) ||
(l.sec() == r.sec() && l.nsec() < r.nsec());
}
inline bool
operator<=(const Time &l, const Time &r)
{
return (l.sec() < r.sec()) ||
(l.sec() == r.sec() && l.nsec() <= r.nsec());
}
inline bool
operator>(const Time &l, const Time &r)
{
return (l.sec() > r.sec()) ||
(l.sec() == r.sec() && l.nsec() > r.nsec());
}
inline bool
operator>=(const Time &l, const Time &r)
{
return (l.sec() > r.sec()) ||
(l.sec() == r.sec() && l.nsec() >= r.nsec());
}
inline Time
operator+(const Time &l, const Time &r)
{
Time time(l);
time += r;
return time;
}
inline Time
operator-(const Time &l, const Time &r)
{
Time time(l);
time -= r;
return time;
}
inline std::ostream &
operator<<(std::ostream &out, const Time &time)
{
out << time.date();
return out;
}
time_t mkutctime(struct tm *time);
#endif // __BASE_TIME_HH__