isa_fake.cc revision 8461:7d0669201f80
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 "debug/IsaFake.hh" 37#include "dev/isa_fake.hh" 38#include "mem/packet.hh" 39#include "mem/packet_access.hh" 40#include "sim/system.hh" 41 42using namespace std; 43 44IsaFake::IsaFake(Params *p) 45 : BasicPioDevice(p) 46{ 47 if (!p->ret_bad_addr) 48 pioSize = p->pio_size; 49 50 retData8 = p->ret_data8; 51 retData16 = p->ret_data16; 52 retData32 = p->ret_data32; 53 retData64 = p->ret_data64; 54} 55 56Tick 57IsaFake::read(PacketPtr pkt) 58{ 59 pkt->allocate(); 60 pkt->makeAtomicResponse(); 61 62 if (params()->warn_access != "") 63 warn("Device %s accessed by read to address %#x size=%d\n", 64 name(), pkt->getAddr(), pkt->getSize()); 65 if (params()->ret_bad_addr) { 66 DPRINTF(IsaFake, "read to bad address va=%#x size=%d\n", 67 pkt->getAddr(), pkt->getSize()); 68 pkt->setBadAddress(); 69 } else { 70 assert(pkt->getAddr() >= pioAddr && pkt->getAddr() < pioAddr + pioSize); 71 DPRINTF(IsaFake, "read va=%#x size=%d\n", 72 pkt->getAddr(), pkt->getSize()); 73 switch (pkt->getSize()) { 74 case sizeof(uint64_t): 75 pkt->set(retData64); 76 break; 77 case sizeof(uint32_t): 78 pkt->set(retData32); 79 break; 80 case sizeof(uint16_t): 81 pkt->set(retData16); 82 break; 83 case sizeof(uint8_t): 84 pkt->set(retData8); 85 break; 86 default: 87 if (params()->fake_mem) 88 std::memset(pkt->getPtr<uint8_t>(), 0, pkt->getSize()); 89 else 90 panic("invalid access size! Device being accessed by cache?\n"); 91 } 92 } 93 return pioDelay; 94} 95 96Tick 97IsaFake::write(PacketPtr pkt) 98{ 99 pkt->makeAtomicResponse(); 100 if (params()->warn_access != "") { 101 uint64_t data; 102 switch (pkt->getSize()) { 103 case sizeof(uint64_t): 104 data = pkt->get<uint64_t>(); 105 break; 106 case sizeof(uint32_t): 107 data = pkt->get<uint32_t>(); 108 break; 109 case sizeof(uint16_t): 110 data = pkt->get<uint16_t>(); 111 break; 112 case sizeof(uint8_t): 113 data = pkt->get<uint8_t>(); 114 break; 115 default: 116 panic("invalid access size!\n"); 117 } 118 warn("Device %s accessed by write to address %#x size=%d data=%#x\n", 119 name(), pkt->getAddr(), pkt->getSize(), data); 120 } 121 if (params()->ret_bad_addr) { 122 DPRINTF(IsaFake, "write to bad address va=%#x size=%d \n", 123 pkt->getAddr(), pkt->getSize()); 124 pkt->setBadAddress(); 125 } else { 126 DPRINTF(IsaFake, "write - va=%#x size=%d \n", 127 pkt->getAddr(), pkt->getSize()); 128 129 if (params()->update_data) { 130 switch (pkt->getSize()) { 131 case sizeof(uint64_t): 132 retData64 = pkt->get<uint64_t>(); 133 break; 134 case sizeof(uint32_t): 135 retData32 = pkt->get<uint32_t>(); 136 break; 137 case sizeof(uint16_t): 138 retData16 = pkt->get<uint16_t>(); 139 break; 140 case sizeof(uint8_t): 141 retData8 = pkt->get<uint8_t>(); 142 break; 143 default: 144 panic("invalid access size!\n"); 145 } 146 } 147 } 148 return pioDelay; 149} 150 151IsaFake * 152IsaFakeParams::create() 153{ 154 return new IsaFake(this); 155} 156