cmos.cc revision 11793
1/* 2 * Copyright (c) 2004-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 */ 30 31#include "dev/x86/cmos.hh" 32 33#include "debug/CMOS.hh" 34#include "dev/x86/intdev.hh" 35#include "mem/packet_access.hh" 36 37void 38X86ISA::Cmos::X86RTC::handleEvent() 39{ 40 assert(intPin); 41 intPin->raise(); 42 //XXX This is a hack. 43 intPin->lower(); 44} 45 46Tick 47X86ISA::Cmos::read(PacketPtr pkt) 48{ 49 assert(pkt->getSize() == 1); 50 switch(pkt->getAddr() - pioAddr) 51 { 52 case 0x0: 53 pkt->set(address); 54 break; 55 case 0x1: 56 pkt->set(readRegister(address)); 57 break; 58 default: 59 panic("Read from undefined CMOS port.\n"); 60 } 61 pkt->makeAtomicResponse(); 62 return latency; 63} 64 65Tick 66X86ISA::Cmos::write(PacketPtr pkt) 67{ 68 assert(pkt->getSize() == 1); 69 switch(pkt->getAddr() - pioAddr) 70 { 71 case 0x0: 72 address = pkt->get<uint8_t>(); 73 break; 74 case 0x1: 75 writeRegister(address, pkt->get<uint8_t>()); 76 break; 77 default: 78 panic("Write to undefined CMOS port.\n"); 79 } 80 pkt->makeAtomicResponse(); 81 return latency; 82} 83 84uint8_t 85X86ISA::Cmos::readRegister(uint8_t reg) 86{ 87 assert(reg < numRegs); 88 uint8_t val; 89 if (reg <= 0xD) { 90 val = rtc.readData(reg); 91 DPRINTF(CMOS, 92 "Reading CMOS RTC reg %x as %x.\n", reg, val); 93 } else { 94 val = regs[reg]; 95 DPRINTF(CMOS, 96 "Reading non-volitile CMOS address %x as %x.\n", reg, val); 97 } 98 return val; 99} 100 101void 102X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val) 103{ 104 assert(reg < numRegs); 105 if (reg <= 0xD) { 106 DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n", 107 reg, val); 108 rtc.writeData(reg, val); 109 } else { 110 DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n", 111 reg, val); 112 regs[reg] = val; 113 } 114} 115 116void 117X86ISA::Cmos::startup() 118{ 119 rtc.startup(); 120} 121 122void 123X86ISA::Cmos::serialize(CheckpointOut &cp) const 124{ 125 SERIALIZE_SCALAR(address); 126 SERIALIZE_ARRAY(regs, numRegs); 127 128 // Serialize the timer 129 rtc.serialize("rtc", cp); 130} 131 132void 133X86ISA::Cmos::unserialize(CheckpointIn &cp) 134{ 135 UNSERIALIZE_SCALAR(address); 136 UNSERIALIZE_ARRAY(regs, numRegs); 137 138 // Serialize the timer 139 rtc.unserialize("rtc", cp); 140} 141 142X86ISA::Cmos * 143CmosParams::create() 144{ 145 return new X86ISA::Cmos(this); 146} 147