port.cc revision 5283:3ab643fa74be 
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 defaultPeerPortClass: public Port
43{
44  protected:
45    void blowUp()
46    {
47        fatal("Unconnected port!");
48    }
49
50  public:
51    defaultPeerPortClass() : Port("default_port")
52    {}
53
54    bool recvTiming(PacketPtr)
55    {
56        blowUp();
57        return false;
58    }
59
60    Tick recvAtomic(PacketPtr)
61    {
62        blowUp();
63        return 0;
64    }
65
66    void recvFunctional(PacketPtr)
67    {
68        blowUp();
69    }
70
71    void recvStatusChange(Status)
72    {
73        blowUp();
74    }
75
76    int deviceBlockSize()
77    {
78        blowUp();
79        return 0;
80    }
81
82    void getDeviceAddressRanges(AddrRangeList &, bool &)
83    {
84        blowUp();
85    }
86
87    bool isDefaultPort() { return true; }
88
89} defaultPeerPort;
90
91Port::Port() : peer(&defaultPeerPort), owner(NULL)
92{
93}
94
95Port::Port(const std::string &_name, MemObject *_owner) :
96    portName(_name), peer(&defaultPeerPort), owner(_owner)
97{
98}
99
100void
101Port::setPeer(Port *port)
102{
103    DPRINTF(Config, "setting peer to %s\n", port->name());
104    peer = port;
105}
106
107void
108Port::removeConn()
109{
110    if (peer->getOwner())
111        peer->getOwner()->deletePortRefs(peer);
112    peer = NULL;
113}
114
115void
116Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
117{
118    Request req;
119
120    for (ChunkGenerator gen(addr, size, peerBlockSize());
121         !gen.done(); gen.next()) {
122        req.setPhys(gen.addr(), gen.size(), 0);
123        Packet pkt(&req, cmd, Packet::Broadcast);
124        pkt.dataStatic(p);
125        sendFunctional(&pkt);
126        p += gen.size();
127    }
128}
129
130void
131Port::writeBlob(Addr addr, uint8_t *p, int size)
132{
133    blobHelper(addr, p, size, MemCmd::WriteReq);
134}
135
136void
137Port::readBlob(Addr addr, uint8_t *p, int size)
138{
139    blobHelper(addr, p, size, MemCmd::ReadReq);
140}
141
142void
143Port::memsetBlob(Addr addr, uint8_t val, int size)
144{
145    // quick and dirty...
146    uint8_t *buf = new uint8_t[size];
147
148    std::memset(buf, val, size);
149    blobHelper(addr, buf, size, MemCmd::WriteReq);
150
151    delete [] buf;
152}
153