mc146818.hh revision 5392
15392Sgblack@eecs.umich.edu/* 25392Sgblack@eecs.umich.edu * Copyright (c) 2004-2005 The Regents of The University of Michigan 35392Sgblack@eecs.umich.edu * All rights reserved. 45392Sgblack@eecs.umich.edu * 55392Sgblack@eecs.umich.edu * Redistribution and use in source and binary forms, with or without 65392Sgblack@eecs.umich.edu * modification, are permitted provided that the following conditions are 75392Sgblack@eecs.umich.edu * met: redistributions of source code must retain the above copyright 85392Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer; 95392Sgblack@eecs.umich.edu * redistributions in binary form must reproduce the above copyright 105392Sgblack@eecs.umich.edu * notice, this list of conditions and the following disclaimer in the 115392Sgblack@eecs.umich.edu * documentation and/or other materials provided with the distribution; 125392Sgblack@eecs.umich.edu * neither the name of the copyright holders nor the names of its 135392Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 145392Sgblack@eecs.umich.edu * this software without specific prior written permission. 155392Sgblack@eecs.umich.edu * 165392Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 175392Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 185392Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 195392Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 205392Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 215392Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 225392Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 235392Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 245392Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 255392Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 265392Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 275392Sgblack@eecs.umich.edu * 285392Sgblack@eecs.umich.edu * Authors: Ali Saidi 295392Sgblack@eecs.umich.edu * Andrew Schultz 305392Sgblack@eecs.umich.edu * Miguel Serrano 315392Sgblack@eecs.umich.edu */ 325392Sgblack@eecs.umich.edu 335392Sgblack@eecs.umich.edu#ifndef __DEV_MC146818_HH__ 345392Sgblack@eecs.umich.edu#define __DEV_MC146818_HH__ 355392Sgblack@eecs.umich.edu 365392Sgblack@eecs.umich.edu#include "base/range.hh" 375392Sgblack@eecs.umich.edu#include "sim/eventq.hh" 385392Sgblack@eecs.umich.edu 395392Sgblack@eecs.umich.edu/** Real-Time Clock (MC146818) */ 405392Sgblack@eecs.umich.educlass MC146818 415392Sgblack@eecs.umich.edu{ 425392Sgblack@eecs.umich.edu protected: 435392Sgblack@eecs.umich.edu virtual void handleEvent() 445392Sgblack@eecs.umich.edu { 455392Sgblack@eecs.umich.edu warn("No RTC event handler defined.\n"); 465392Sgblack@eecs.umich.edu } 475392Sgblack@eecs.umich.edu 485392Sgblack@eecs.umich.edu private: 495392Sgblack@eecs.umich.edu /** Event for RTC periodic interrupt */ 505392Sgblack@eecs.umich.edu struct RTCEvent : public Event 515392Sgblack@eecs.umich.edu { 525392Sgblack@eecs.umich.edu MC146818 * parent; 535392Sgblack@eecs.umich.edu Tick interval; 545392Sgblack@eecs.umich.edu 555392Sgblack@eecs.umich.edu RTCEvent(MC146818 * _parent, Tick i); 565392Sgblack@eecs.umich.edu 575392Sgblack@eecs.umich.edu /** Schedule the RTC periodic interrupt */ 585392Sgblack@eecs.umich.edu void scheduleIntr(); 595392Sgblack@eecs.umich.edu 605392Sgblack@eecs.umich.edu /** Event process to occur at interrupt*/ 615392Sgblack@eecs.umich.edu virtual void process(); 625392Sgblack@eecs.umich.edu 635392Sgblack@eecs.umich.edu /** Event description */ 645392Sgblack@eecs.umich.edu virtual const char *description() const; 655392Sgblack@eecs.umich.edu }; 665392Sgblack@eecs.umich.edu 675392Sgblack@eecs.umich.edu private: 685392Sgblack@eecs.umich.edu std::string _name; 695392Sgblack@eecs.umich.edu const std::string &name() const { return _name; } 705392Sgblack@eecs.umich.edu 715392Sgblack@eecs.umich.edu /** RTC periodic interrupt event */ 725392Sgblack@eecs.umich.edu RTCEvent event; 735392Sgblack@eecs.umich.edu 745392Sgblack@eecs.umich.edu /** Data for real-time clock function */ 755392Sgblack@eecs.umich.edu union { 765392Sgblack@eecs.umich.edu uint8_t clock_data[10]; 775392Sgblack@eecs.umich.edu 785392Sgblack@eecs.umich.edu struct { 795392Sgblack@eecs.umich.edu uint8_t sec; 805392Sgblack@eecs.umich.edu uint8_t sec_alrm; 815392Sgblack@eecs.umich.edu uint8_t min; 825392Sgblack@eecs.umich.edu uint8_t min_alrm; 835392Sgblack@eecs.umich.edu uint8_t hour; 845392Sgblack@eecs.umich.edu uint8_t hour_alrm; 855392Sgblack@eecs.umich.edu uint8_t wday; 865392Sgblack@eecs.umich.edu uint8_t mday; 875392Sgblack@eecs.umich.edu uint8_t mon; 885392Sgblack@eecs.umich.edu uint8_t year; 895392Sgblack@eecs.umich.edu }; 905392Sgblack@eecs.umich.edu }; 915392Sgblack@eecs.umich.edu 925392Sgblack@eecs.umich.edu /** RTC status register A */ 935392Sgblack@eecs.umich.edu uint8_t stat_regA; 945392Sgblack@eecs.umich.edu 955392Sgblack@eecs.umich.edu /** RTC status register B */ 965392Sgblack@eecs.umich.edu uint8_t stat_regB; 975392Sgblack@eecs.umich.edu 985392Sgblack@eecs.umich.edu public: 995392Sgblack@eecs.umich.edu virtual ~MC146818() 1005392Sgblack@eecs.umich.edu {} 1015392Sgblack@eecs.umich.edu 1025392Sgblack@eecs.umich.edu MC146818(const std::string &name, const struct tm time, 1035392Sgblack@eecs.umich.edu bool bcd, Tick frequency); 1045392Sgblack@eecs.umich.edu 1055392Sgblack@eecs.umich.edu /** RTC write data */ 1065392Sgblack@eecs.umich.edu void writeData(const uint8_t addr, const uint8_t data); 1075392Sgblack@eecs.umich.edu 1085392Sgblack@eecs.umich.edu /** RTC read data */ 1095392Sgblack@eecs.umich.edu uint8_t readData(const uint8_t addr); 1105392Sgblack@eecs.umich.edu 1115392Sgblack@eecs.umich.edu /** 1125392Sgblack@eecs.umich.edu * Serialize this object to the given output stream. 1135392Sgblack@eecs.umich.edu * @param base The base name of the counter object. 1145392Sgblack@eecs.umich.edu * @param os The stream to serialize to. 1155392Sgblack@eecs.umich.edu */ 1165392Sgblack@eecs.umich.edu void serialize(const std::string &base, std::ostream &os); 1175392Sgblack@eecs.umich.edu 1185392Sgblack@eecs.umich.edu /** 1195392Sgblack@eecs.umich.edu * Reconstruct the state of this object from a checkpoint. 1205392Sgblack@eecs.umich.edu * @param base The base name of the counter object. 1215392Sgblack@eecs.umich.edu * @param cp The checkpoint use. 1225392Sgblack@eecs.umich.edu * @param section The section name of this object 1235392Sgblack@eecs.umich.edu */ 1245392Sgblack@eecs.umich.edu void unserialize(const std::string &base, Checkpoint *cp, 1255392Sgblack@eecs.umich.edu const std::string §ion); 1265392Sgblack@eecs.umich.edu}; 1275392Sgblack@eecs.umich.edu 1285392Sgblack@eecs.umich.edu#endif // __DEV_MC146818_HH__ 129