src/mem/port.cc

   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
  42 class DefaultPeerPort : public Port
  43 {
  44   protected:
  45     void blowUp() const
  46     {
  47         fatal("%s: Unconnected port!", peer->name());
  48     }
  49
  50   public:
  51     DefaultPeerPort()
  52         : Port("default_port", NULL)
  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     unsigned
  78     deviceBlockSize() const
  79     {
  80         blowUp();
  81         return 0;
  82     }
  83
  84     void getDeviceAddressRanges(AddrRangeList &, bool &)
  85     {
  86         blowUp();
  87     }
  88
  89     bool isDefaultPort() const { return true; }
  90 };
  91
  92 DefaultPeerPort defaultPeerPort;
  93
  94 Port::Port(const std::string &_name, MemObject *_owner)
  95     : EventManager(_owner), portName(_name), peer(&defaultPeerPort),
  96       owner(_owner)
  97 {
  98 }
  99
 100 Port::~Port()
 101 {
 102 }
 103
 104 void
 105 Port::setPeer(Port *port)
 106 {
 107     DPRINTF(Config, "setting peer to %s\n", port->name());
 108
 109     peer = port;
 110 }
 111
 112 void
 113 Port::setOwner(MemObject *_owner)
 114 {
 115     eventq = _owner->queue();
 116     owner = _owner;
 117 }
 118
 119 void
 120 Port::removeConn()
 121 {
 122     if (peer->getOwner())
 123         peer->getOwner()->deletePortRefs(peer);
 124     peer = NULL;
 125 }
 126
 127 void
 128 Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
 129 {
 130     Request req;
 131
 132     for (ChunkGenerator gen(addr, size, peerBlockSize());
 133          !gen.done(); gen.next()) {
 134         req.setPhys(gen.addr(), gen.size(), 0);
 135         Packet pkt(&req, cmd, Packet::Broadcast);
 136         pkt.dataStatic(p);
 137         sendFunctional(&pkt);
 138         p += gen.size();
 139     }
 140 }
 141
 142 void
 143 Port::writeBlob(Addr addr, uint8_t *p, int size)
 144 {
 145     blobHelper(addr, p, size, MemCmd::WriteReq);
 146 }
 147
 148 void
 149 Port::readBlob(Addr addr, uint8_t *p, int size)
 150 {
 151     blobHelper(addr, p, size, MemCmd::ReadReq);
 152 }
 153
 154 void
 155 Port::memsetBlob(Addr addr, uint8_t val, int size)
 156 {
 157     // quick and dirty...
 158     uint8_t *buf = new uint8_t[size];
 159
 160     std::memset(buf, val, size);
 161     blobHelper(addr, buf, size, MemCmd::WriteReq);
 162
 163     delete [] buf;
 164 }
 165
 166
 167 void
 168 Port::printAddr(Addr a)
 169 {
 170     Request req(a, 1, 0);
 171     Packet pkt(&req, MemCmd::PrintReq, Packet::Broadcast);
 172     Packet::PrintReqState prs(std::cerr);
 173     pkt.senderState = &prs;
 174
 175     sendFunctional(&pkt);
 176 }