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)
  54     : portName(_name), peer(NULL), 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)
  66     : Port(name, *owner), _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     peer = &slave_port;
  90
  91     // slave port also keeps track of master port
  92     _slavePort->bind(*this);
  93 }
  94
  95 bool
  96 MasterPort::isConnected() const
  97 {
  98     return _slavePort != NULL;
  99 }
 100
 101 unsigned
 102 MasterPort::peerBlockSize() const
 103 {
 104     return _slavePort->deviceBlockSize();
 105 }
 106
 107 Tick
 108 MasterPort::sendAtomic(PacketPtr pkt)
 109 {
 110     return _slavePort->recvAtomic(pkt);
 111 }
 112
 113 void
 114 MasterPort::sendFunctional(PacketPtr pkt)
 115 {
 116     return _slavePort->recvFunctional(pkt);
 117 }
 118
 119 void
 120 MasterPort::printAddr(Addr a)
 121 {
 122     Request req(a, 1, 0, Request::funcMasterId);
 123     Packet pkt(&req, MemCmd::PrintReq);
 124     Packet::PrintReqState prs(std::cerr);
 125     pkt.senderState = &prs;
 126
 127     sendFunctional(&pkt);
 128 }
 129
 130 /**
 131  * Slave port
 132  */
 133 SlavePort::SlavePort(const std::string& name, MemObject* owner)
 134     : Port(name, *owner), _masterPort(NULL)
 135 {
 136 }
 137
 138 SlavePort::~SlavePort()
 139 {
 140 }
 141
 142 void
 143 SlavePort::bind(MasterPort& master_port)
 144 {
 145     _masterPort = &master_port;
 146     peer = &master_port;
 147 }
 148
 149 MasterPort&
 150 SlavePort::getMasterPort() const
 151 {
 152     if (_masterPort == NULL)
 153         panic("Cannot getMasterPort on slave port %s that is not connected\n",
 154               name());
 155
 156     return *_masterPort;
 157 }
 158
 159 unsigned
 160 SlavePort::peerBlockSize() const
 161 {
 162     return _masterPort->deviceBlockSize();
 163 }
 164
 165 bool
 166 SlavePort::isConnected() const
 167 {
 168     return _masterPort != NULL;
 169 }
 170
 171 Tick
 172 SlavePort::sendAtomicSnoop(PacketPtr pkt)
 173 {
 174     return _masterPort->recvAtomicSnoop(pkt);
 175 }
 176
 177 void
 178 SlavePort::sendFunctionalSnoop(PacketPtr pkt)
 179 {
 180     return _masterPort->recvFunctionalSnoop(pkt);
 181 }