cmos.hh revision 5634
1/* 2 * Copyright (c) 2008 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#ifndef __DEV_X86_CMOS_HH__ 32#define __DEV_X86_CMOS_HH__ 33 34#include "dev/io_device.hh" 35#include "dev/mc146818.hh" 36#include "params/Cmos.hh" 37 38namespace X86ISA 39{ 40 41class IntPin; 42 43class Cmos : public BasicPioDevice 44{ 45 protected: 46 Tick latency; 47 48 uint8_t address; 49 50 static const int numRegs = 128; 51 52 uint8_t regs[numRegs]; 53 54 uint8_t readRegister(uint8_t reg); 55 void writeRegister(uint8_t reg, uint8_t val); 56 57 class X86RTC : public MC146818 58 { 59 protected: 60 IntPin * intPin; 61 public: 62 X86RTC(EventManager *em, const std::string &n, const struct tm time, 63 bool bcd, Tick frequency, IntPin * _intPin) : 64 MC146818(em, n, time, bcd, frequency), intPin(_intPin) 65 { 66 } 67 protected: 68 void handleEvent(); 69 } rtc; 70 71 public: 72 typedef CmosParams Params; 73 74 Cmos(const Params *p) : BasicPioDevice(p), latency(p->pio_latency), 75 rtc(this, "rtc", p->time, true, ULL(5000000000), p->int_pin) 76 { 77 pioSize = 2; 78 memset(regs, 0, numRegs * sizeof(uint8_t)); 79 address = 0; 80 } 81 82 Tick read(PacketPtr pkt); 83 84 Tick write(PacketPtr pkt); 85}; 86 87}; // namespace X86ISA 88 89#endif //__DEV_X86_CMOS_HH__ 90