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 "debug/Config.hh"
  40 #include "mem/mem_object.hh"
  41 #include "mem/port.hh"
  42
  43 class 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
  93 DefaultPeerPort defaultPeerPort;
  94
  95 Port::Port(const std::string &_name, MemObject *_owner)
  96     : portName(_name), peer(&defaultPeerPort), 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     owner = _owner;
 116 }
 117
 118 void
 119 Port::removeConn()
 120 {
 121     if (peer->getOwner())
 122         peer->getOwner()->deletePortRefs(peer);
 123     peer = NULL;
 124 }
 125
 126 void
 127 Port::blobHelper(Addr addr, uint8_t *p, int size, MemCmd cmd)
 128 {
 129     Request req;
 130
 131     for (ChunkGenerator gen(addr, size, peerBlockSize());
 132          !gen.done(); gen.next()) {
 133         req.setPhys(gen.addr(), gen.size(), 0);
 134         Packet pkt(&req, cmd, Packet::Broadcast);
 135         pkt.dataStatic(p);
 136         sendFunctional(&pkt);
 137         p += gen.size();
 138     }
 139 }
 140
 141 void
 142 Port::writeBlob(Addr addr, uint8_t *p, int size)
 143 {
 144     blobHelper(addr, p, size, MemCmd::WriteReq);
 145 }
 146
 147 void
 148 Port::readBlob(Addr addr, uint8_t *p, int size)
 149 {
 150     blobHelper(addr, p, size, MemCmd::ReadReq);
 151 }
 152
 153 void
 154 Port::memsetBlob(Addr addr, uint8_t val, int size)
 155 {
 156     // quick and dirty...
 157     uint8_t *buf = new uint8_t[size];
 158
 159     std::memset(buf, val, size);
 160     blobHelper(addr, buf, size, MemCmd::WriteReq);
 161
 162     delete [] buf;
 163 }
 164
 165
 166 void
 167 Port::printAddr(Addr a)
 168 {
 169     Request req(a, 1, 0);
 170     Packet pkt(&req, MemCmd::PrintReq, Packet::Broadcast);
 171     Packet::PrintReqState prs(std::cerr);
 172     pkt.senderState = &prs;
 173
 174     sendFunctional(&pkt);
 175 }