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/*
* Copyright (c) 2002-2004 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* @file
* Device module for modelling an ethernet hub
*/
#ifndef __ETHERBUS_H__
#define __ETHERBUS_H__
#include "sim/eventq.hh"
#include "dev/etherpkt.hh"
#include "sim/sim_object.hh"
class EtherDump;
class EtherInt;
class EtherBus : public SimObject
{
protected:
typedef std::list<EtherInt *> devlist_t;
devlist_t devlist;
double ticks_per_byte;
bool loopback;
protected:
class DoneEvent : public Event
{
protected:
EtherBus *bus;
public:
DoneEvent(EventQueue *q, EtherBus *b)
: Event(q), bus(b) {}
virtual void process() { bus->txDone(); }
virtual const char *description() { return "ethernet bus completion"; }
};
DoneEvent event;
PacketPtr packet;
EtherInt *sender;
EtherDump *dump;
public:
EtherBus(const std::string &name, double ticks_per_byte, bool loopback,
EtherDump *dump);
virtual ~EtherBus() {}
void txDone();
void reg(EtherInt *dev);
bool busy() const { return (bool)packet; }
bool send(EtherInt *sender, PacketPtr &packet);
};
#endif // __ETHERBUS_H__
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