port.cc revision 9294
1/* 2 * Copyright (c) 2012 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2002-2005 The Regents of The University of Michigan 15 * All rights reserved. 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions are 19 * met: redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer; 21 * redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution; 24 * neither the name of the copyright holders nor the names of its 25 * contributors may be used to endorse or promote products derived from 26 * this software without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 39 * 40 * Authors: Steve Reinhardt 41 * Andreas Hansson 42 * William Wang 43 */ 44 45/** 46 * @file 47 * Port object definitions. 48 */ 49#include "base/trace.hh" 50#include "mem/mem_object.hh" 51#include "mem/port.hh" 52 53Port::Port(const std::string &_name, MemObject& _owner, PortID _id) 54 : portName(_name), id(_id), owner(_owner) 55{ 56} 57 58Port::~Port() 59{ 60} 61 62BaseMasterPort::BaseMasterPort(const std::string& name, MemObject* owner, 63 PortID _id) 64 : Port(name, *owner, _id), _baseSlavePort(NULL) 65{ 66} 67 68BaseMasterPort::~BaseMasterPort() 69{ 70} 71 72BaseSlavePort& 73BaseMasterPort::getSlavePort() const 74{ 75 if(_baseSlavePort == NULL) 76 panic("Cannot getSlavePort on master port %s that is not connected\n", 77 name()); 78 79 return *_baseSlavePort; 80} 81 82bool 83BaseMasterPort::isConnected() const 84{ 85 return _baseSlavePort != NULL; 86} 87 88BaseSlavePort::BaseSlavePort(const std::string& name, MemObject* owner, 89 PortID _id) 90 : Port(name, *owner, _id), _baseMasterPort(NULL) 91{ 92} 93 94BaseSlavePort::~BaseSlavePort() 95{ 96} 97 98BaseMasterPort& 99BaseSlavePort::getMasterPort() const 100{ 101 if(_baseMasterPort == NULL) 102 panic("Cannot getMasterPort on slave port %s that is not connected\n", 103 name()); 104 105 return *_baseMasterPort; 106} 107 108bool 109BaseSlavePort::isConnected() const 110{ 111 return _baseMasterPort != NULL; 112} 113 114/** 115 * Master port 116 */ 117MasterPort::MasterPort(const std::string& name, MemObject* owner, PortID _id) 118 : BaseMasterPort(name, owner, _id), _slavePort(NULL) 119{ 120} 121 122MasterPort::~MasterPort() 123{ 124} 125 126void 127MasterPort::bind(BaseSlavePort& slave_port) 128{ 129 // bind on the level of the base ports 130 _baseSlavePort = &slave_port; 131 132 // also attempt to base the slave to the appropriate type 133 SlavePort* cast_slave_port = dynamic_cast<SlavePort*>(&slave_port); 134 135 // if this port is compatible, then proceed with the binding 136 if (cast_slave_port != NULL) { 137 // master port keeps track of the slave port 138 _slavePort = cast_slave_port; 139 // slave port also keeps track of master port 140 _slavePort->bind(*this); 141 } else { 142 fatal("Master port %s cannot bind to %s\n", name(), 143 slave_port.name()); 144 } 145} 146 147void 148MasterPort::unbind() 149{ 150 if (_slavePort == NULL) 151 panic("Attempting to unbind master port %s that is not connected\n", 152 name()); 153 _slavePort->unbind(); 154 _slavePort = NULL; 155 _baseSlavePort = NULL; 156} 157 158unsigned 159MasterPort::peerBlockSize() const 160{ 161 return _slavePort->deviceBlockSize(); 162} 163 164AddrRangeList 165MasterPort::getAddrRanges() const 166{ 167 return _slavePort->getAddrRanges(); 168} 169 170Tick 171MasterPort::sendAtomic(PacketPtr pkt) 172{ 173 assert(pkt->isRequest()); 174 return _slavePort->recvAtomic(pkt); 175} 176 177void 178MasterPort::sendFunctional(PacketPtr pkt) 179{ 180 assert(pkt->isRequest()); 181 return _slavePort->recvFunctional(pkt); 182} 183 184bool 185MasterPort::sendTimingReq(PacketPtr pkt) 186{ 187 assert(pkt->isRequest()); 188 return _slavePort->recvTimingReq(pkt); 189} 190 191bool 192MasterPort::sendTimingSnoopResp(PacketPtr pkt) 193{ 194 assert(pkt->isResponse()); 195 return _slavePort->recvTimingSnoopResp(pkt); 196} 197 198void 199MasterPort::sendRetry() 200{ 201 _slavePort->recvRetry(); 202} 203 204void 205MasterPort::printAddr(Addr a) 206{ 207 Request req(a, 1, 0, Request::funcMasterId); 208 Packet pkt(&req, MemCmd::PrintReq); 209 Packet::PrintReqState prs(std::cerr); 210 pkt.senderState = &prs; 211 212 sendFunctional(&pkt); 213} 214 215/** 216 * Slave port 217 */ 218SlavePort::SlavePort(const std::string& name, MemObject* owner, PortID id) 219 : BaseSlavePort(name, owner, id), _masterPort(NULL) 220{ 221} 222 223SlavePort::~SlavePort() 224{ 225} 226 227void 228SlavePort::unbind() 229{ 230 _baseMasterPort = NULL; 231 _masterPort = NULL; 232} 233 234void 235SlavePort::bind(MasterPort& master_port) 236{ 237 _baseMasterPort = &master_port; 238 _masterPort = &master_port; 239} 240 241unsigned 242SlavePort::peerBlockSize() const 243{ 244 return _masterPort->deviceBlockSize(); 245} 246 247Tick 248SlavePort::sendAtomicSnoop(PacketPtr pkt) 249{ 250 assert(pkt->isRequest()); 251 return _masterPort->recvAtomicSnoop(pkt); 252} 253 254void 255SlavePort::sendFunctionalSnoop(PacketPtr pkt) 256{ 257 assert(pkt->isRequest()); 258 return _masterPort->recvFunctionalSnoop(pkt); 259} 260 261bool 262SlavePort::sendTimingResp(PacketPtr pkt) 263{ 264 assert(pkt->isResponse()); 265 return _masterPort->recvTimingResp(pkt); 266} 267 268void 269SlavePort::sendTimingSnoopReq(PacketPtr pkt) 270{ 271 assert(pkt->isRequest()); 272 _masterPort->recvTimingSnoopReq(pkt); 273} 274 275void 276SlavePort::sendRetry() 277{ 278 _masterPort->recvRetry(); 279} 280