port.cc revision 5494 
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 "mem/mem_object.hh"
40#include "mem/port.hh"
41
42class DefaultPeerPort : public Port
43{
44  protected:
45    void blowUp()
46    {
47        fatal("%s: Unconnected port!", peer->name());
48    }
49
50  public:
51    DefaultPeerPort()
52        : Port("default_port")
53    { }
54
55    bool recvTiming(PacketPtr)
56    {
57        blowUp();
58        return false;
59    }
60
61    Tick recvAtomic(PacketPtr)
62    {
63        blowUp();
64        return 0;
65    }
66
67    void recvFunctional(PacketPtr)
68    {
69        blowUp();
70    }
71
72    void recvStatusChange(Status)
73    {
74        blowUp();
75    }
76
77    int deviceBlockSize()
78    {
79        blowUp();
80        return 0;
81    }
82
83    void getDeviceAddressRanges(AddrRangeList &, bool &)
84    {
85        blowUp();
86    }
87
88    bool isDefaultPort() const { return true; }
89};
90
91DefaultPeerPort defaultPeerPort;
92
93Port::Port()
94    : peer(&defaultPeerPort), owner(NULL)
95{
96}
97
98Port::Port(const std::string &_name, MemObject *_owner)
99    : portName(_name), peer(&defaultPeerPort), owner(_owner)
100{
101}
102
103Port::~Port()
104{
105}
106
107void
108Port::setPeer(Port *port)
109{
110    DPRINTF(Config, "setting peer to %s\n", port->name());
111
112    peer = port;
113}
114
115void
116Port::removeConn()
117{
118    if (peer->getOwner())
119        peer->getOwner()->deletePortRefs(peer);
120    peer = NULL;
121}
122
123void
124Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
125{
126    Request req;
127
128    for (ChunkGenerator gen(addr, size, peerBlockSize());
129         !gen.done(); gen.next()) {
130        req.setPhys(gen.addr(), gen.size(), 0);
131        Packet pkt(&req, cmd, Packet::Broadcast);
132        pkt.dataStatic(p);
133        sendFunctional(&pkt);
134        p += gen.size();
135    }
136}
137
138void
139Port::writeBlob(Addr addr, uint8_t *p, int size)
140{
141    blobHelper(addr, p, size, MemCmd::WriteReq);
142}
143
144void
145Port::readBlob(Addr addr, uint8_t *p, int size)
146{
147    blobHelper(addr, p, size, MemCmd::ReadReq);
148}
149
150void
151Port::memsetBlob(Addr addr, uint8_t val, int size)
152{
153    // quick and dirty...
154    uint8_t *buf = new uint8_t[size];
155
156    std::memset(buf, val, size);
157    blobHelper(addr, buf, size, MemCmd::WriteReq);
158
159    delete [] buf;
160}
161
162
163void
164Port::printAddr(Addr a)
165{
166    Request req(a, 1, 0);
167    Packet pkt(&req, MemCmd::PrintReq, Packet::Broadcast);
168    Packet::PrintReqState prs(std::cerr);
169    pkt.senderState = &prs;
170
171    sendFunctional(&pkt);
172}
173