port.cc revision 9031:32ecc0217c5e 
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), peer(NULL), owner(_owner)
55{
56}
57
58Port::~Port()
59{
60}
61
62/**
63 * Master port
64 */
65MasterPort::MasterPort(const std::string& name, MemObject* owner, PortID _id)
66    : Port(name, *owner, _id), _slavePort(NULL)
67{
68}
69
70MasterPort::~MasterPort()
71{
72}
73
74SlavePort&
75MasterPort::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
84void
85MasterPort::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
95bool
96MasterPort::isConnected() const
97{
98    return _slavePort != NULL;
99}
100
101unsigned
102MasterPort::peerBlockSize() const
103{
104    return _slavePort->deviceBlockSize();
105}
106
107Tick
108MasterPort::sendAtomic(PacketPtr pkt)
109{
110    assert(pkt->isRequest());
111    return _slavePort->recvAtomic(pkt);
112}
113
114void
115MasterPort::sendFunctional(PacketPtr pkt)
116{
117    assert(pkt->isRequest());
118    return _slavePort->recvFunctional(pkt);
119}
120
121bool
122MasterPort::sendTimingReq(PacketPtr pkt)
123{
124    assert(pkt->isRequest());
125    return _slavePort->recvTimingReq(pkt);
126}
127
128bool
129MasterPort::sendTimingSnoopResp(PacketPtr pkt)
130{
131    assert(pkt->isResponse());
132    return _slavePort->recvTimingSnoopResp(pkt);
133}
134
135void
136MasterPort::printAddr(Addr a)
137{
138    Request req(a, 1, 0, Request::funcMasterId);
139    Packet pkt(&req, MemCmd::PrintReq);
140    Packet::PrintReqState prs(std::cerr);
141    pkt.senderState = &prs;
142
143    sendFunctional(&pkt);
144}
145
146/**
147 * Slave port
148 */
149SlavePort::SlavePort(const std::string& name, MemObject* owner, PortID id)
150    : Port(name, *owner, id), _masterPort(NULL)
151{
152}
153
154SlavePort::~SlavePort()
155{
156}
157
158void
159SlavePort::bind(MasterPort& master_port)
160{
161    _masterPort = &master_port;
162    peer = &master_port;
163}
164
165MasterPort&
166SlavePort::getMasterPort() const
167{
168    if (_masterPort == NULL)
169        panic("Cannot getMasterPort on slave port %s that is not connected\n",
170              name());
171
172    return *_masterPort;
173}
174
175unsigned
176SlavePort::peerBlockSize() const
177{
178    return _masterPort->deviceBlockSize();
179}
180
181bool
182SlavePort::isConnected() const
183{
184    return _masterPort != NULL;
185}
186
187Tick
188SlavePort::sendAtomicSnoop(PacketPtr pkt)
189{
190    assert(pkt->isRequest());
191    return _masterPort->recvAtomicSnoop(pkt);
192}
193
194void
195SlavePort::sendFunctionalSnoop(PacketPtr pkt)
196{
197    assert(pkt->isRequest());
198    return _masterPort->recvFunctionalSnoop(pkt);
199}
200
201bool
202SlavePort::sendTimingResp(PacketPtr pkt)
203{
204    assert(pkt->isResponse());
205    return _masterPort->recvTimingResp(pkt);
206}
207
208void
209SlavePort::sendTimingSnoopReq(PacketPtr pkt)
210{
211    assert(pkt->isRequest());
212    _masterPort->recvTimingSnoopReq(pkt);
213}
214