c74cb77fa4
delay is more or less folded into the packet time, but an additional delay is possible representing crossing a long haul link, or some switches, etc. --HG-- extra : convert_revision : 8fd689c2a7e3051e77f47a4cd5f51c6999d92c8f
127 lines
3.8 KiB
C++
127 lines
3.8 KiB
C++
/*
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* Copyright (c) 2003 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* @file
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* Device module for modelling a fixed bandwidth full duplex ethernet link
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*/
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#ifndef __ETHERLINK_HH__
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#define __ETHERLINK_HH__
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#include "sim/host.hh"
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#include "sim/eventq.hh"
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#include "dev/etherint.hh"
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#include "dev/etherpkt.hh"
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#include "sim/sim_object.hh"
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class EtherDump;
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/*
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* Model for a fixed bandwidth full duplex ethernet link
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*/
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class EtherLink : public SimObject
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{
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protected:
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class Interface;
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friend class LinkDelayEvent;
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/*
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* Model for a single uni-directional link
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*/
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class Link : public Serializable {
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protected:
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std::string objName;
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Interface *txint;
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Interface *rxint;
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double ticksPerByte;
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Tick linkDelay;
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EtherDump *dump;
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protected:
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/*
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* Transfer is complete
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*/
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PacketPtr packet;
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void txDone();
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typedef EventWrapper<Link, &Link::txDone> DoneEvent;
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friend class DoneEvent;
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DoneEvent doneEvent;
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friend class LinkDelayEvent;
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void txComplete(PacketPtr &packet);
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public:
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Link(const std::string &name, double rate, Tick delay,
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EtherDump *dump);
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~Link() {}
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virtual const std::string name() const { return objName; }
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bool busy() const { return (bool)packet; }
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bool transmit(PacketPtr &packet);
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void setTxInt(Interface *i) { assert(!txint); txint = i; }
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void setRxInt(Interface *i) { assert(!rxint); rxint = i; }
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virtual void serialize(std::ostream &os);
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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/*
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* Interface at each end of the link
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*/
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class Interface : public EtherInt
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{
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private:
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Link *txlink;
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public:
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Interface(const std::string &name, Link *txlink, Link *rxlink);
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bool recvPacket(PacketPtr &packet) { return txlink->transmit(packet); }
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void sendDone() { }
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};
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Link *link1;
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Link *link2;
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EtherInt *int1;
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EtherInt *int2;
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public:
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EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
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Tick speed, Tick delay, EtherDump *dump);
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virtual ~EtherLink();
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virtual void serialize(std::ostream &os);
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virtual void unserialize(Checkpoint *cp, const std::string §ion);
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};
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#endif // __ETHERLINK_HH__
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