src/dev/etherbus.hh

   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: Nathan Binkert
  29  */
  30
  31 /* @file
  32  * Device module for modelling an ethernet hub
  33  */
  34
  35 #ifndef __ETHERBUS_H__
  36 #define __ETHERBUS_H__
  37
  38 #include "sim/eventq.hh"
  39 #include "dev/etherpkt.hh"
  40 #include "sim/sim_object.hh"
  41
  42 class EtherDump;
  43 class EtherInt;
  44 class EtherBus : public SimObject
  45 {
  46   protected:
  47     typedef std::list<EtherInt *> devlist_t;
  48     devlist_t devlist;
  49     double ticksPerByte;
  50     bool loopback;
  51
  52   protected:
  53     class DoneEvent : public Event
  54     {
  55       protected:
  56         EtherBus *bus;
  57
  58       public:
  59         DoneEvent(EventQueue *q, EtherBus *b)
  60             : Event(q), bus(b) {}
  61         virtual void process() { bus->txDone(); }
  62         virtual const char *description() { return "ethernet bus completion"; }
  63     };
  64
  65     DoneEvent event;
  66     EthPacketPtr packet;
  67     EtherInt *sender;
  68     EtherDump *dump;
  69
  70   public:
  71     EtherBus(const std::string &name, double speed, bool loopback,
  72              EtherDump *dump);
  73     virtual ~EtherBus() {}
  74
  75     void txDone();
  76     void reg(EtherInt *dev);
  77     bool busy() const { return (bool)packet; }
  78     bool send(EtherInt *sender, EthPacketPtr &packet);
  79 };
  80
  81 #endif // __ETHERBUS_H__