cmos.cc revision 5827
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#include "dev/x86/intdev.hh" 33#include "mem/packet_access.hh" 34 35void 36X86ISA::Cmos::X86RTC::handleEvent() 37{ 38 assert(intPin); 39 intPin->raise(); 40 //XXX This is a hack. 41 intPin->lower(); 42} 43 44Tick 45X86ISA::Cmos::read(PacketPtr pkt) 46{ 47 assert(pkt->getSize() == 1); 48 switch(pkt->getAddr() - pioAddr) 49 { 50 case 0x0: 51 pkt->set(address); 52 break; 53 case 0x1: 54 pkt->set(readRegister(address)); 55 break; 56 default: 57 panic("Read from undefined CMOS port.\n"); 58 } 59 return latency; 60} 61 62Tick 63X86ISA::Cmos::write(PacketPtr pkt) 64{ 65 assert(pkt->getSize() == 1); 66 switch(pkt->getAddr() - pioAddr) 67 { 68 case 0x0: 69 address = pkt->get<uint8_t>(); 70 break; 71 case 0x1: 72 writeRegister(address, pkt->get<uint8_t>()); 73 break; 74 default: 75 panic("Write to undefined CMOS port.\n"); 76 } 77 return latency; 78} 79 80uint8_t 81X86ISA::Cmos::readRegister(uint8_t reg) 82{ 83 assert(reg < numRegs); 84 uint8_t val; 85 if (reg <= 0xD) { 86 val = rtc.readData(reg); 87 DPRINTF(CMOS, 88 "Reading CMOS RTC reg %x as %x.\n", reg, val); 89 } else { 90 val = regs[reg]; 91 DPRINTF(CMOS, 92 "Reading non-volitile CMOS address %x as %x.\n", reg, val); 93 } 94 return val; 95} 96 97void 98X86ISA::Cmos::writeRegister(uint8_t reg, uint8_t val) 99{ 100 assert(reg < numRegs); 101 if (reg <= 0xD) { 102 DPRINTF(CMOS, "Writing CMOS RTC reg %x with %x.\n", 103 reg, val); 104 rtc.writeData(reg, val); 105 } else { 106 DPRINTF(CMOS, "Writing non-volitile CMOS address %x with %x.\n", 107 reg, val); 108 regs[reg] = val; 109 } 110} 111 112X86ISA::Cmos * 113CmosParams::create() 114{ 115 return new X86ISA::Cmos(this); 116} 117