io_device.cc revision 2532
1/* 2 * Copyright (c) 2006 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, Platform *p) 34 : device(dev), platform(p) 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 &resp, AddrRangeList &snoop) 52{ 53 snoop.clear(); 54 device->addressRanges(resp); 55} 56 57 58Packet * 59PioPort::recvRetry() 60{ 61 Packet* pkt = transmitList.front(); 62 transmitList.pop_front(); 63 return pkt; 64} 65 66 67void 68PioPort::SendEvent::process() 69{ 70 if (port->Port::sendTiming(packet) == Success) 71 return; 72 73 port->transmitList.push_back(&packet); 74} 75 76 77bool 78PioPort::recvTiming(Packet &pkt) 79{ 80 device->recvAtomic(pkt); 81 sendTiming(pkt, pkt.time-pkt.req->getTime()); 82 return Success; 83} 84 85PioDevice::~PioDevice() 86{ 87 if (pioPort) 88 delete pioPort; 89} 90 91 92DmaPort::DmaPort(DmaDevice *dev) 93 : device(dev) 94{ } 95 96bool 97DmaPort::recvTiming(Packet &pkt) 98{ 99 completionEvent->schedule(curTick+1); 100 completionEvent = NULL; 101 return Success; 102} 103 104DmaDevice::DmaDevice(Params *p) 105 : PioDevice(p) 106{ 107 dmaPort = new DmaPort(this); 108} 109 110void 111DmaPort::SendEvent::process() 112{ 113 if (port->Port::sendTiming(packet) == Success) 114 return; 115 116 port->transmitList.push_back(&packet); 117} 118 119Packet * 120DmaPort::recvRetry() 121{ 122 Packet* pkt = transmitList.front(); 123 transmitList.pop_front(); 124 return pkt; 125} 126void 127DmaPort::dmaAction(Command cmd, DmaPort port, Addr addr, int size, 128 Event *event, uint8_t *data) 129{ 130 131 assert(event); 132 133 int prevSize = 0; 134 Packet basePkt; 135 Request baseReq(false); 136 137 basePkt.flags = 0; 138 basePkt.coherence = NULL; 139 basePkt.senderState = NULL; 140 basePkt.src = 0; 141 basePkt.dest = 0; 142 basePkt.cmd = cmd; 143 basePkt.result = Unknown; 144 basePkt.req = NULL; 145// baseReq.nicReq = true; 146 baseReq.setTime(curTick); 147 148 completionEvent = event; 149 150 for (ChunkGenerator gen(addr, size, peerBlockSize()); 151 !gen.done(); gen.next()) { 152 Packet *pkt = new Packet(basePkt); 153 Request *req = new Request(baseReq); 154 pkt->addr = gen.addr(); 155 pkt->size = gen.size(); 156 pkt->req = req; 157 pkt->req->setPaddr(pkt->addr); 158 pkt->req->setSize(pkt->size); 159 // Increment the data pointer on a write 160 pkt->data = data ? data + prevSize : NULL ; 161 prevSize += pkt->size; 162 163 sendDma(*pkt); 164 } 165} 166 167 168void 169DmaPort::sendDma(Packet &pkt) 170{ 171 // some kind of selction between access methods 172 // more work is going to have to be done to make 173 // switching actually work 174 /* MemState state = device->platform->system->memState; 175 176 if (state == Timing) { 177 if (sendTiming(pkt) == Failure) 178 transmitList.push_back(&packet); 179 } else if (state == Atomic) {*/ 180 sendAtomic(pkt); 181 completionEvent->schedule(pkt.time - pkt.req->getTime()); 182 completionEvent = NULL; 183/* } else if (state == Functional) { 184 sendFunctional(pkt); 185 // Is this correct??? 186 completionEvent->schedule(pkt.req->responseTime - pkt.req->requestTime); 187 completionEvent == NULL; 188 } else 189 panic("Unknown memory command state."); 190 */ 191} 192 193DmaDevice::~DmaDevice() 194{ 195 if (dmaPort) 196 delete dmaPort; 197} 198 199 200