e5bdae15f3
--HG-- extra : convert_revision : 1e7f5185654ed0845678c2169c702d3b977159ed
128 lines
3.9 KiB
C++
128 lines
3.9 KiB
C++
/*
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* Copyright (c) 2004-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ali Saidi
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* Andrew Schultz
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* Miguel Serrano
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*/
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#ifndef __DEV_MC146818_HH__
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#define __DEV_MC146818_HH__
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#include "base/range.hh"
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#include "sim/eventq.hh"
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/** Real-Time Clock (MC146818) */
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class MC146818
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{
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protected:
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virtual void handleEvent()
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{
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warn("No RTC event handler defined.\n");
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}
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private:
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/** Event for RTC periodic interrupt */
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struct RTCEvent : public Event
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{
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MC146818 * parent;
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Tick interval;
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RTCEvent(MC146818 * _parent, Tick i);
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/** Schedule the RTC periodic interrupt */
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void scheduleIntr();
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/** Event process to occur at interrupt*/
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virtual void process();
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/** Event description */
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virtual const char *description() const;
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};
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private:
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std::string _name;
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const std::string &name() const { return _name; }
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/** RTC periodic interrupt event */
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RTCEvent event;
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/** Data for real-time clock function */
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union {
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uint8_t clock_data[10];
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struct {
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uint8_t sec;
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uint8_t sec_alrm;
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uint8_t min;
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uint8_t min_alrm;
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uint8_t hour;
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uint8_t hour_alrm;
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uint8_t wday;
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uint8_t mday;
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uint8_t mon;
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uint8_t year;
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};
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};
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/** RTC status register A */
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uint8_t stat_regA;
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/** RTC status register B */
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uint8_t stat_regB;
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public:
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virtual ~MC146818()
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{}
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MC146818(const std::string &name, const struct tm time,
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bool bcd, Tick frequency);
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/** RTC write data */
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void writeData(const uint8_t addr, const uint8_t data);
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/** RTC read data */
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uint8_t readData(const uint8_t addr);
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/**
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* Serialize this object to the given output stream.
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* @param base The base name of the counter object.
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* @param os The stream to serialize to.
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*/
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void serialize(const std::string &base, std::ostream &os);
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/**
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* Reconstruct the state of this object from a checkpoint.
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* @param base The base name of the counter object.
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* @param cp The checkpoint use.
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* @param section The section name of this object
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*/
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void unserialize(const std::string &base, Checkpoint *cp,
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const std::string §ion);
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};
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#endif // __DEV_MC146818_HH__
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