io_device.cc revision 2542
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 91void 92PioDevice::init() 93{ 94 if (!pioPort) 95 panic("Pio port not connected to anything!"); 96 pioPort->sendStatusChange(Port::RangeChange); 97} 98 99void 100BasicPioDevice::addressRanges(AddrRangeList &range_list) 101{ 102 assert(pioSize != 0); 103 range_list.clear(); 104 range_list.push_back(RangeSize(pioAddr, pioSize)); 105} 106 107 108DmaPort::DmaPort(DmaDevice *dev) 109 : device(dev) 110{ } 111 112bool 113DmaPort::recvTiming(Packet &pkt) 114{ 115 completionEvent->schedule(curTick+1); 116 completionEvent = NULL; 117 return Success; 118} 119 120DmaDevice::DmaDevice(Params *p) 121 : PioDevice(p) 122{ 123 dmaPort = new DmaPort(this); 124} 125 126void 127DmaPort::SendEvent::process() 128{ 129 if (port->Port::sendTiming(packet) == Success) 130 return; 131 132 port->transmitList.push_back(&packet); 133} 134 135Packet * 136DmaPort::recvRetry() 137{ 138 Packet* pkt = transmitList.front(); 139 transmitList.pop_front(); 140 return pkt; 141} 142void 143DmaPort::dmaAction(Command cmd, DmaPort port, Addr addr, int size, 144 Event *event, uint8_t *data) 145{ 146 147 assert(event); 148 149 int prevSize = 0; 150 Packet basePkt; 151 Request baseReq(false); 152 153 basePkt.flags = 0; 154 basePkt.coherence = NULL; 155 basePkt.senderState = NULL; 156 basePkt.src = 0; 157 basePkt.dest = 0; 158 basePkt.cmd = cmd; 159 basePkt.result = Unknown; 160 basePkt.req = NULL; 161// baseReq.nicReq = true; 162 baseReq.setTime(curTick); 163 164 completionEvent = event; 165 166 for (ChunkGenerator gen(addr, size, peerBlockSize()); 167 !gen.done(); gen.next()) { 168 Packet *pkt = new Packet(basePkt); 169 Request *req = new Request(baseReq); 170 pkt->addr = gen.addr(); 171 pkt->size = gen.size(); 172 pkt->req = req; 173 pkt->req->setPaddr(pkt->addr); 174 pkt->req->setSize(pkt->size); 175 // Increment the data pointer on a write 176 pkt->data = data ? data + prevSize : NULL ; 177 prevSize += pkt->size; 178 179 sendDma(*pkt); 180 } 181} 182 183 184void 185DmaPort::sendDma(Packet &pkt) 186{ 187 // some kind of selction between access methods 188 // more work is going to have to be done to make 189 // switching actually work 190 /* MemState state = device->platform->system->memState; 191 192 if (state == Timing) { 193 if (sendTiming(pkt) == Failure) 194 transmitList.push_back(&packet); 195 } else if (state == Atomic) {*/ 196 sendAtomic(pkt); 197 completionEvent->schedule(pkt.time - pkt.req->getTime()); 198 completionEvent = NULL; 199/* } else if (state == Functional) { 200 sendFunctional(pkt); 201 // Is this correct??? 202 completionEvent->schedule(pkt.req->responseTime - pkt.req->requestTime); 203 completionEvent == NULL; 204 } else 205 panic("Unknown memory command state."); 206 */ 207} 208 209DmaDevice::~DmaDevice() 210{ 211 if (dmaPort) 212 delete dmaPort; 213} 214 215 216