isa_fake.cc revision 4918:3214e3694fb2
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: Ali Saidi 29 */ 30 31/** @file 32 * Isa Fake Device implementation 33 */ 34 35#include "base/trace.hh" 36#include "dev/isa_fake.hh" 37#include "mem/packet.hh" 38#include "mem/packet_access.hh" 39#include "sim/system.hh" 40 41using namespace std; 42 43IsaFake::IsaFake(Params *p) 44 : BasicPioDevice(p) 45{ 46 if (!p->ret_bad_addr) 47 pioSize = p->pio_size; 48 49 retData8 = p->ret_data8; 50 retData16 = p->ret_data16; 51 retData32 = p->ret_data32; 52 retData64 = p->ret_data64; 53} 54 55Tick 56IsaFake::read(PacketPtr pkt) 57{ 58 59 if (params()->warn_access != "") 60 warn("Device %s accessed by read to address %#x size=%d\n", 61 name(), pkt->getAddr(), pkt->getSize()); 62 if (params()->ret_bad_addr) { 63 DPRINTF(Tsunami, "read to bad address va=%#x size=%d\n", 64 pkt->getAddr(), pkt->getSize()); 65 pkt->setBadAddress(); 66 } else { 67 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 68 DPRINTF(Tsunami, "read va=%#x size=%d\n", 69 pkt->getAddr(), pkt->getSize()); 70 switch (pkt->getSize()) { 71 case sizeof(uint64_t): 72 pkt->set(retData64); 73 break; 74 case sizeof(uint32_t): 75 pkt->set(retData32); 76 break; 77 case sizeof(uint16_t): 78 pkt->set(retData16); 79 break; 80 case sizeof(uint8_t): 81 pkt->set(retData8); 82 break; 83 default: 84 panic("invalid access size!\n"); 85 } 86 pkt->makeAtomicResponse(); 87 } 88 return pioDelay; 89} 90 91Tick 92IsaFake::write(PacketPtr pkt) 93{ 94 if (params()->warn_access != "") { 95 uint64_t data; 96 switch (pkt->getSize()) { 97 case sizeof(uint64_t): 98 data = pkt->get<uint64_t>(); 99 break; 100 case sizeof(uint32_t): 101 data = pkt->get<uint32_t>(); 102 break; 103 case sizeof(uint16_t): 104 data = pkt->get<uint16_t>(); 105 break; 106 case sizeof(uint8_t): 107 data = pkt->get<uint8_t>(); 108 break; 109 default: 110 panic("invalid access size!\n"); 111 } 112 warn("Device %s accessed by write to address %#x size=%d data=%#x\n", 113 name(), pkt->getAddr(), pkt->getSize(), data); 114 } 115 if (params()->ret_bad_addr) { 116 DPRINTF(Tsunami, "write to bad address va=%#x size=%d \n", 117 pkt->getAddr(), pkt->getSize()); 118 pkt->setBadAddress(); 119 } else { 120 DPRINTF(Tsunami, "write - va=%#x size=%d \n", 121 pkt->getAddr(), pkt->getSize()); 122 123 if (params()->update_data) { 124 switch (pkt->getSize()) { 125 case sizeof(uint64_t): 126 retData64 = pkt->get<uint64_t>(); 127 break; 128 case sizeof(uint32_t): 129 retData32 = pkt->get<uint32_t>(); 130 break; 131 case sizeof(uint16_t): 132 retData16 = pkt->get<uint16_t>(); 133 break; 134 case sizeof(uint8_t): 135 retData8 = pkt->get<uint8_t>(); 136 break; 137 default: 138 panic("invalid access size!\n"); 139 } 140 } 141 pkt->makeAtomicResponse(); 142 } 143 return pioDelay; 144} 145 146IsaFake * 147IsaFakeParams::create() 148{ 149 return new IsaFake(this); 150} 151