port.cc revision 13782
1/* 2 * Copyright (c) 2012,2015,2017 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 "mem/port.hh" 50 51#include "base/trace.hh" 52#include "mem/mem_object.hh" 53 54BaseMasterPort::BaseMasterPort(const std::string &name, PortID _id) 55 : Port(name, _id), _baseSlavePort(NULL) 56{ 57} 58 59BaseMasterPort::~BaseMasterPort() 60{ 61} 62 63BaseSlavePort& 64BaseMasterPort::getSlavePort() const 65{ 66 if (_baseSlavePort == NULL) 67 panic("Cannot getSlavePort on master port %s that is not connected\n", 68 name()); 69 70 return *_baseSlavePort; 71} 72 73BaseSlavePort::BaseSlavePort(const std::string &name, PortID _id) 74 : Port(name, _id), _baseMasterPort(NULL) 75{ 76} 77 78BaseSlavePort::~BaseSlavePort() 79{ 80} 81 82BaseMasterPort& 83BaseSlavePort::getMasterPort() const 84{ 85 if (_baseMasterPort == NULL) 86 panic("Cannot getMasterPort on slave port %s that is not connected\n", 87 name()); 88 89 return *_baseMasterPort; 90} 91 92/** 93 * Master port 94 */ 95MasterPort::MasterPort(const std::string& name, MemObject* _owner, PortID _id) 96 : BaseMasterPort(name, _id), _slavePort(NULL), owner(*_owner) 97{ 98} 99 100MasterPort::~MasterPort() 101{ 102} 103 104void 105MasterPort::bind(Port &peer) 106{ 107 auto *slave_port = dynamic_cast<SlavePort *>(&peer); 108 if (!slave_port) { 109 fatal("Attempt to bind port %s to non-slave port %s.", 110 name(), peer.name()); 111 } 112 // bind on the level of the base ports 113 _baseSlavePort = slave_port; 114 115 // master port keeps track of the slave port 116 _slavePort = slave_port; 117 _connected = true; 118 // slave port also keeps track of master port 119 _slavePort->slaveBind(*this); 120} 121 122void 123MasterPort::unbind() 124{ 125 if (_slavePort == NULL) 126 panic("Attempting to unbind master port %s that is not connected\n", 127 name()); 128 _slavePort->slaveUnbind(); 129 _slavePort = NULL; 130 _connected = false; 131 _baseSlavePort = NULL; 132} 133 134AddrRangeList 135MasterPort::getAddrRanges() const 136{ 137 return _slavePort->getAddrRanges(); 138} 139 140Tick 141MasterPort::sendAtomic(PacketPtr pkt) 142{ 143 assert(pkt->isRequest()); 144 return _slavePort->recvAtomic(pkt); 145} 146 147void 148MasterPort::sendFunctional(PacketPtr pkt) 149{ 150 assert(pkt->isRequest()); 151 return _slavePort->recvFunctional(pkt); 152} 153 154bool 155MasterPort::sendTimingReq(PacketPtr pkt) 156{ 157 assert(pkt->isRequest()); 158 return _slavePort->recvTimingReq(pkt); 159} 160 161bool 162MasterPort::tryTiming(PacketPtr pkt) const 163{ 164 assert(pkt->isRequest()); 165 return _slavePort->tryTiming(pkt); 166} 167 168bool 169MasterPort::sendTimingSnoopResp(PacketPtr pkt) 170{ 171 assert(pkt->isResponse()); 172 return _slavePort->recvTimingSnoopResp(pkt); 173} 174 175void 176MasterPort::sendRetryResp() 177{ 178 _slavePort->recvRespRetry(); 179} 180 181void 182MasterPort::printAddr(Addr a) 183{ 184 auto req = std::make_shared<Request>( 185 a, 1, 0, Request::funcMasterId); 186 187 Packet pkt(req, MemCmd::PrintReq); 188 Packet::PrintReqState prs(std::cerr); 189 pkt.senderState = &prs; 190 191 sendFunctional(&pkt); 192} 193 194/** 195 * Slave port 196 */ 197SlavePort::SlavePort(const std::string& name, MemObject* _owner, PortID id) 198 : BaseSlavePort(name, id), _masterPort(NULL), owner(*_owner) 199{ 200} 201 202SlavePort::~SlavePort() 203{ 204} 205 206void 207SlavePort::slaveUnbind() 208{ 209 _baseMasterPort = NULL; 210 _masterPort = NULL; 211 _connected = false; 212} 213 214void 215SlavePort::slaveBind(MasterPort& master_port) 216{ 217 _baseMasterPort = &master_port; 218 _masterPort = &master_port; 219 _connected = true; 220} 221 222Tick 223SlavePort::sendAtomicSnoop(PacketPtr pkt) 224{ 225 assert(pkt->isRequest()); 226 return _masterPort->recvAtomicSnoop(pkt); 227} 228 229void 230SlavePort::sendFunctionalSnoop(PacketPtr pkt) 231{ 232 assert(pkt->isRequest()); 233 return _masterPort->recvFunctionalSnoop(pkt); 234} 235 236bool 237SlavePort::sendTimingResp(PacketPtr pkt) 238{ 239 assert(pkt->isResponse()); 240 return _masterPort->recvTimingResp(pkt); 241} 242 243void 244SlavePort::sendTimingSnoopReq(PacketPtr pkt) 245{ 246 assert(pkt->isRequest()); 247 _masterPort->recvTimingSnoopReq(pkt); 248} 249 250void 251SlavePort::sendRetryReq() 252{ 253 _masterPort->recvReqRetry(); 254} 255 256void 257SlavePort::sendRetrySnoopResp() 258{ 259 _masterPort->recvRetrySnoopResp(); 260} 261