gem5/dev/etherlink.hh
Steve Reinhardt 777c1ebfab Stats & serialization tweaks & cleanup. Unserializing from
a checkpoint now gives identical results to running from scratch
and doing at switchover at the same cycle!
- CPUs start at cycle 0 again, not cycle 1.
- curTick is now serialized & unserialized.
- Stats get reset in main (before event loop).  Since this is done
after curTick is unserialized, simTicks gets set correctly for
running from a checkpoint.
- Simplify serialization to happen in a single pass.
- s/Serializeable/Serializable/

arch/alpha/isa_traits.hh:
dev/etherlink.hh:
sim/eventq.cc:
sim/eventq.hh:
    s/Serializeable/Serializable/
kern/tru64/tru64_system.cc:
sim/process.cc:
    Make initial CPU activation on cycle 0 again (not 1).
sim/main.cc:
    Reset stats before getting started.
    Make error message on falling out of event loop
    more meaningful.
sim/serialize.cc:
sim/serialize.hh:
    Get rid of now-useless initial pass; serialization is
    done in a single pass now.
    Serialize & unserialize curTick.
    Wrap curTick and mainEventQueue in a "globals" Serializable object.
    s/Serializeable/Serializable/
sim/sim_object.cc:
    Add static function to serialize all SimObjects.
sim/sim_object.hh:
    Add static function to serialize all SimObjects.
    s/Serializeable/Serializable/

--HG--
extra : convert_revision : 9dcc411d0009b54b8eb61c3a509680b81b9f6f68
2003-12-11 00:16:46 -08:00

127 lines
3.7 KiB
C++

/*
* Copyright (c) 2003 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 a fixed bandwidth full duplex ethernet link
*/
#ifndef __ETHERLINK_HH__
#define __ETHERLINK_HH__
#include "sim/host.hh"
#include "sim/eventq.hh"
#include "dev/etherint.hh"
#include "dev/etherpkt.hh"
#include "sim/sim_object.hh"
class EtherDump;
/*
* Model for a fixed bandwidth full duplex ethernet link
*/
class EtherLink : public SimObject
{
protected:
class Interface;
/*
* Model for a single uni-directional link
*/
class Link : public Serializable {
protected:
std::string objName;
Interface *txint;
Interface *rxint;
double ticks_per_byte;
EtherDump *dump;
protected:
/*
* Transfer is complete
*/
class DoneEvent : public Event
{
protected:
Link *link;
public:
DoneEvent(EventQueue *q, Link *l)
: Event(q), link(l) {}
virtual void process() { link->txDone(); }
virtual const char *description()
{ return "ethernet link completion"; }
};
friend class DoneEvent;
DoneEvent event;
PacketPtr packet;
void txDone();
public:
Link(const std::string &name, double rate, EtherDump *dump);
~Link() {}
virtual std::string name() const { return objName; }
bool busy() const { return (bool)packet; }
bool transmit(PacketPtr packet);
void setTxInt(Interface *i) { assert(!txint); txint = i; }
void setRxInt(Interface *i) { assert(!rxint); rxint = i; }
};
/*
* Interface at each end of the link
*/
class Interface : public EtherInt
{
private:
Link *txlink;
public:
Interface(const std::string &name, Link *txlink, Link *rxlink);
bool recvPacket(PacketPtr packet) { return txlink->transmit(packet); }
void sendDone() { }
};
Link *link1;
Link *link2;
EtherInt *int1;
EtherInt *int2;
public:
EtherLink(const std::string &name, EtherInt *i1, EtherInt *i2,
Tick speed, EtherDump *dump);
virtual ~EtherLink();
};
#endif // __ETHERLINK_HH__