src/mem/port.cc

   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
  53 Port::Port(const std::string &_name, MemObject& _owner, PortID _id)
  54     : portName(_name), id(_id), owner(_owner)
  55 {
  56 }
  57
  58 Port::~Port()
  59 {
  60 }
  61
  62 /**
  63  * Master port
  64  */
  65 MasterPort::MasterPort(const std::string& name, MemObject* owner, PortID _id)
  66     : Port(name, *owner, _id), _slavePort(NULL)
  67 {
  68 }
  69
  70 MasterPort::~MasterPort()
  71 {
  72 }
  73
  74 SlavePort&
  75 MasterPort::getSlavePort() const
  76 {
  77     if(_slavePort == NULL)
  78         panic("Cannot getSlavePort on master port %s that is not connected\n",
  79               name());
  80
  81     return *_slavePort;
  82 }
  83
  84 void
  85 MasterPort::bind(SlavePort& slave_port)
  86 {
  87     // master port keeps track of the slave port
  88     _slavePort = &slave_port;
  89
  90     // slave port also keeps track of master port
  91     _slavePort->bind(*this);
  92 }
  93
  94 bool
  95 MasterPort::isConnected() const
  96 {
  97     return _slavePort != NULL;
  98 }
  99
 100 unsigned
 101 MasterPort::peerBlockSize() const
 102 {
 103     return _slavePort->deviceBlockSize();
 104 }
 105
 106 Tick
 107 MasterPort::sendAtomic(PacketPtr pkt)
 108 {
 109     assert(pkt->isRequest());
 110     return _slavePort->recvAtomic(pkt);
 111 }
 112
 113 void
 114 MasterPort::sendFunctional(PacketPtr pkt)
 115 {
 116     assert(pkt->isRequest());
 117     return _slavePort->recvFunctional(pkt);
 118 }
 119
 120 bool
 121 MasterPort::sendTimingReq(PacketPtr pkt)
 122 {
 123     assert(pkt->isRequest());
 124     return _slavePort->recvTimingReq(pkt);
 125 }
 126
 127 bool
 128 MasterPort::sendTimingSnoopResp(PacketPtr pkt)
 129 {
 130     assert(pkt->isResponse());
 131     return _slavePort->recvTimingSnoopResp(pkt);
 132 }
 133
 134 void
 135 MasterPort::sendRetry()
 136 {
 137     _slavePort->recvRetry();
 138 }
 139
 140 void
 141 MasterPort::printAddr(Addr a)
 142 {
 143     Request req(a, 1, 0, Request::funcMasterId);
 144     Packet pkt(&req, MemCmd::PrintReq);
 145     Packet::PrintReqState prs(std::cerr);
 146     pkt.senderState = &prs;
 147
 148     sendFunctional(&pkt);
 149 }
 150
 151 /**
 152  * Slave port
 153  */
 154 SlavePort::SlavePort(const std::string& name, MemObject* owner, PortID id)
 155     : Port(name, *owner, id), _masterPort(NULL)
 156 {
 157 }
 158
 159 SlavePort::~SlavePort()
 160 {
 161 }
 162
 163 void
 164 SlavePort::bind(MasterPort& master_port)
 165 {
 166     _masterPort = &master_port;
 167 }
 168
 169 MasterPort&
 170 SlavePort::getMasterPort() const
 171 {
 172     if (_masterPort == NULL)
 173         panic("Cannot getMasterPort on slave port %s that is not connected\n",
 174               name());
 175
 176     return *_masterPort;
 177 }
 178
 179 unsigned
 180 SlavePort::peerBlockSize() const
 181 {
 182     return _masterPort->deviceBlockSize();
 183 }
 184
 185 bool
 186 SlavePort::isConnected() const
 187 {
 188     return _masterPort != NULL;
 189 }
 190
 191 Tick
 192 SlavePort::sendAtomicSnoop(PacketPtr pkt)
 193 {
 194     assert(pkt->isRequest());
 195     return _masterPort->recvAtomicSnoop(pkt);
 196 }
 197
 198 void
 199 SlavePort::sendFunctionalSnoop(PacketPtr pkt)
 200 {
 201     assert(pkt->isRequest());
 202     return _masterPort->recvFunctionalSnoop(pkt);
 203 }
 204
 205 bool
 206 SlavePort::sendTimingResp(PacketPtr pkt)
 207 {
 208     assert(pkt->isResponse());
 209     return _masterPort->recvTimingResp(pkt);
 210 }
 211
 212 void
 213 SlavePort::sendTimingSnoopReq(PacketPtr pkt)
 214 {
 215     assert(pkt->isRequest());
 216     _masterPort->recvTimingSnoopReq(pkt);
 217 }
 218
 219 void
 220 SlavePort::sendRetry()
 221 {
 222     _masterPort->recvRetry();
 223 }