io_device.cc revision 2489
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 29#include "dev/io_device.hh" 30#include "sim/builder.hh" 31 32 33PioPort::PioPort(PioDevice *dev) 34 : device(dev) 35{ } 36 37 38Tick 39PioPort::recvAtomic(Packet &pkt) 40{ 41 return device->recvAtomic(pkt); 42} 43 44void 45PioPort::recvFunctional(Packet &pkt) 46{ 47 device->recvAtomic(pkt); 48} 49 50void 51PioPort::getDeviceAddressRanges(AddrRangeList &range_list, bool &owner) 52{ 53 device->addressRanges(range_list, owner); 54} 55 56 57Packet * 58PioPort::recvRetry() 59{ 60 Packet* pkt = transmitList.front(); 61 transmitList.pop_front(); 62 return pkt; 63} 64 65 66void 67PioPort::SendEvent::process() 68{ 69 if (port->Port::sendTiming(packet) == Success) 70 return; 71 72 port->transmitList.push_back(&packet); 73} 74 75PioDevice::PioDevice(const std::string &name, Platform *p) 76 : SimObject(name), platform(p) 77{ 78 pioPort = new PioPort(this); 79} 80 81 82bool 83PioPort::recvTiming(Packet &pkt) 84{ 85 device->recvAtomic(pkt); 86 sendTiming(pkt, pkt.req->responseTime-pkt.req->requestTime); 87 return Success; 88} 89 90PioDevice::~PioDevice() 91{ 92 if (pioPort) 93 delete pioPort; 94} 95 96 97DmaPort::DmaPort(DmaDevice *dev) 98 : device(dev) 99{ } 100 101bool 102DmaPort::recvTiming(Packet &pkt) 103{ 104 completionEvent->schedule(curTick+1); 105 completionEvent = NULL; 106 return Success; 107} 108 109DmaDevice::DmaDevice(const std::string &name, Platform *p) 110 : PioDevice(name, p) 111{ 112 dmaPort = new DmaPort(this); 113} 114 115void 116DmaPort::SendEvent::process() 117{ 118 if (port->Port::sendTiming(packet) == Success) 119 return; 120 121 port->transmitList.push_back(&packet); 122} 123 124Packet * 125DmaPort::recvRetry() 126{ 127 Packet* pkt = transmitList.front(); 128 transmitList.pop_front(); 129 return pkt; 130} 131void 132DmaPort::dmaAction(Command cmd, DmaPort port, Addr addr, int size, 133 Event *event, uint8_t *data) 134{ 135 136 assert(event); 137 138 int prevSize = 0; 139 Packet basePkt; 140 Request baseReq; 141 142 basePkt.flags = 0; 143 basePkt.coherence = NULL; 144 basePkt.senderState = NULL; 145 basePkt.src = 0; 146 basePkt.dest = 0; 147 basePkt.cmd = cmd; 148 basePkt.result = Unknown; 149 basePkt.req = NULL; 150 baseReq.nicReq = true; 151 baseReq.requestTime = curTick; 152 153 completionEvent = event; 154 155 for (ChunkGenerator gen(addr, size, peerBlockSize()); 156 !gen.done(); gen.next()) { 157 Packet *pkt = new Packet(basePkt); 158 Request *req = new Request(baseReq); 159 pkt->addr = gen.addr(); 160 pkt->size = gen.size(); 161 pkt->req = req; 162 pkt->req->paddr = pkt->addr; 163 pkt->req->size = pkt->size; 164 // Increment the data pointer on a write 165 pkt->data = data ? data + prevSize : NULL ; 166 prevSize += pkt->size; 167 168 sendDma(*pkt); 169 } 170} 171 172 173void 174DmaPort::sendDma(Packet &pkt) 175{ 176 // some kind of selction between access methods 177 // more work is going to have to be done to make 178 // switching actually work 179 /* MemState state = device->platform->system->memState; 180 181 if (state == Timing) { 182 if (sendTiming(pkt) == Failure) 183 transmitList.push_back(&packet); 184 } else if (state == Atomic) {*/ 185 sendAtomic(pkt); 186 completionEvent->schedule(pkt.req->responseTime - pkt.req->requestTime); 187 completionEvent = NULL; 188/* } else if (state == Functional) { 189 sendFunctional(pkt); 190 // Is this correct??? 191 completionEvent->schedule(pkt.req->responseTime - pkt.req->requestTime); 192 completionEvent == NULL; 193 } else 194 panic("Unknown memory command state."); 195 */ 196} 197 198DmaDevice::~DmaDevice() 199{ 200 if (dmaPort) 201 delete dmaPort; 202} 203 204 205