port.cc revision 8232 
1/*
2 * Copyright (c) 2002-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Steve Reinhardt
29 */
30
31/**
32 * @file
33 * Port object definitions.
34 */
35#include <cstring>
36
37#include "base/chunk_generator.hh"
38#include "base/trace.hh"
39#include "debug/Config.hh"
40#include "mem/mem_object.hh"
41#include "mem/port.hh"
42
43class DefaultPeerPort : public Port
44{
45  protected:
46    void blowUp() const
47    {
48        fatal("%s: Unconnected port!", peer->name());
49    }
50
51  public:
52    DefaultPeerPort()
53        : Port("default_port", NULL)
54    { }
55
56    bool recvTiming(PacketPtr)
57    {
58        blowUp();
59        return false;
60    }
61
62    Tick recvAtomic(PacketPtr)
63    {
64        blowUp();
65        return 0;
66    }
67
68    void recvFunctional(PacketPtr)
69    {
70        blowUp();
71    }
72
73    void recvStatusChange(Status)
74    {
75        blowUp();
76    }
77
78    unsigned
79    deviceBlockSize() const
80    {
81        blowUp();
82        return 0;
83    }
84
85    void getDeviceAddressRanges(AddrRangeList &, bool &)
86    {
87        blowUp();
88    }
89
90    bool isDefaultPort() const { return true; }
91};
92
93DefaultPeerPort defaultPeerPort;
94
95Port::Port(const std::string &_name, MemObject *_owner)
96    : EventManager(_owner), portName(_name), peer(&defaultPeerPort),
97      owner(_owner)
98{
99}
100
101Port::~Port()
102{
103}
104
105void
106Port::setPeer(Port *port)
107{
108    DPRINTF(Config, "setting peer to %s\n", port->name());
109
110    peer = port;
111}
112
113void
114Port::setOwner(MemObject *_owner)
115{
116    eventq = _owner->queue();
117    owner = _owner;
118}
119
120void
121Port::removeConn()
122{
123    if (peer->getOwner())
124        peer->getOwner()->deletePortRefs(peer);
125    peer = NULL;
126}
127
128void
129Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
130{
131    Request req;
132
133    for (ChunkGenerator gen(addr, size, peerBlockSize());
134         !gen.done(); gen.next()) {
135        req.setPhys(gen.addr(), gen.size(), 0);
136        Packet pkt(&req, cmd, Packet::Broadcast);
137        pkt.dataStatic(p);
138        sendFunctional(&pkt);
139        p += gen.size();
140    }
141}
142
143void
144Port::writeBlob(Addr addr, uint8_t *p, int size)
145{
146    blobHelper(addr, p, size, MemCmd::WriteReq);
147}
148
149void
150Port::readBlob(Addr addr, uint8_t *p, int size)
151{
152    blobHelper(addr, p, size, MemCmd::ReadReq);
153}
154
155void
156Port::memsetBlob(Addr addr, uint8_t val, int size)
157{
158    // quick and dirty...
159    uint8_t *buf = new uint8_t[size];
160
161    std::memset(buf, val, size);
162    blobHelper(addr, buf, size, MemCmd::WriteReq);
163
164    delete [] buf;
165}
166
167
168void
169Port::printAddr(Addr a)
170{
171    Request req(a, 1, 0);
172    Packet pkt(&req, MemCmd::PrintReq, Packet::Broadcast);
173    Packet::PrintReqState prs(std::cerr);
174    pkt.senderState = &prs;
175
176    sendFunctional(&pkt);
177}
178