abc76f20cb
creation and initialization now happens in python. Parameter objects are generated and initialized by python. The .ini file is now solely for debugging purposes and is not used in construction of the objects in any way. --HG-- extra : convert_revision : 7e722873e417cb3d696f2e34c35ff488b7bff4ed
280 lines
7.6 KiB
C++
280 lines
7.6 KiB
C++
/*
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* Copyright (c) 2002-2005 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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* Authors: Nathan Binkert
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* Ron Dreslinski
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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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#include <cmath>
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#include <deque>
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#include <string>
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#include <vector>
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#include "base/random.hh"
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#include "base/trace.hh"
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#include "dev/etherdump.hh"
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#include "dev/etherint.hh"
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#include "dev/etherlink.hh"
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#include "dev/etherpkt.hh"
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#include "params/EtherLink.hh"
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#include "sim/serialize.hh"
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#include "sim/system.hh"
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#include "sim/core.hh"
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using namespace std;
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EtherLink::EtherLink(const string &name, EtherInt *peer0, EtherInt *peer1,
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double rate, Tick delay, Tick delayVar, EtherDump *dump)
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: SimObject(name)
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{
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link[0] = new Link(name + ".link0", this, 0, rate, delay, delayVar, dump);
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link[1] = new Link(name + ".link1", this, 1, rate, delay, delayVar, dump);
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interface[0] = new Interface(name + ".int0", link[0], link[1]);
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interface[1] = new Interface(name + ".int1", link[1], link[0]);
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interface[0]->setPeer(peer0);
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peer0->setPeer(interface[0]);
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interface[1]->setPeer(peer1);
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peer1->setPeer(interface[1]);
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}
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EtherLink::~EtherLink()
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{
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delete link[0];
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delete link[1];
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delete interface[0];
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delete interface[1];
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}
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EtherLink::Interface::Interface(const string &name, Link *tx, Link *rx)
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: EtherInt(name), txlink(tx)
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{
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tx->setTxInt(this);
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rx->setRxInt(this);
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}
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EtherLink::Link::Link(const string &name, EtherLink *p, int num,
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double rate, Tick delay, Tick delay_var, EtherDump *d)
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: objName(name), parent(p), number(num), txint(NULL), rxint(NULL),
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ticksPerByte(rate), linkDelay(delay), delayVar(delay_var), dump(d),
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doneEvent(this)
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{ }
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void
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EtherLink::serialize(ostream &os)
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{
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link[0]->serialize("link0", os);
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link[1]->serialize("link1", os);
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}
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void
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EtherLink::unserialize(Checkpoint *cp, const string §ion)
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{
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link[0]->unserialize("link0", cp, section);
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link[1]->unserialize("link1", cp, section);
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}
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void
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EtherLink::Link::txComplete(EthPacketPtr packet)
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{
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DPRINTF(Ethernet, "packet received: len=%d\n", packet->length);
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DDUMP(EthernetData, packet->data, packet->length);
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rxint->sendPacket(packet);
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}
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class LinkDelayEvent : public Event
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{
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protected:
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EtherLink::Link *link;
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EthPacketPtr packet;
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public:
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// non-scheduling version for createForUnserialize()
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LinkDelayEvent();
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LinkDelayEvent(EtherLink::Link *link, EthPacketPtr pkt, Tick when);
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void process();
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virtual void serialize(ostream &os);
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virtual void unserialize(Checkpoint *cp, const string §ion);
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static Serializable *createForUnserialize(Checkpoint *cp,
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const string §ion);
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};
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void
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EtherLink::Link::txDone()
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{
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if (dump)
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dump->dump(packet);
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if (linkDelay > 0) {
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DPRINTF(Ethernet, "packet delayed: delay=%d\n", linkDelay);
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new LinkDelayEvent(this, packet, curTick + linkDelay);
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} else {
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txComplete(packet);
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}
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packet = 0;
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assert(!busy());
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txint->sendDone();
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}
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bool
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EtherLink::Link::transmit(EthPacketPtr pkt)
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{
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if (busy()) {
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DPRINTF(Ethernet, "packet not sent, link busy\n");
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return false;
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}
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DPRINTF(Ethernet, "packet sent: len=%d\n", pkt->length);
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DDUMP(EthernetData, pkt->data, pkt->length);
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packet = pkt;
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Tick delay = (Tick)ceil(((double)pkt->length * ticksPerByte) + 1.0);
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if (delayVar != 0) {
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Random<Tick> var;
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delay += var.uniform(0, delayVar);
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}
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DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
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delay, ticksPerByte);
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doneEvent.schedule(curTick + delay);
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return true;
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}
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void
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EtherLink::Link::serialize(const string &base, ostream &os)
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{
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bool packet_exists = packet;
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paramOut(os, base + ".packet_exists", packet_exists);
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if (packet_exists)
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packet->serialize(base + ".packet", os);
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bool event_scheduled = doneEvent.scheduled();
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paramOut(os, base + ".event_scheduled", event_scheduled);
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if (event_scheduled) {
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Tick event_time = doneEvent.when();
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paramOut(os, base + ".event_time", event_time);
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}
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}
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void
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EtherLink::Link::unserialize(const string &base, Checkpoint *cp,
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const string §ion)
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{
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bool packet_exists;
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paramIn(cp, section, base + ".packet_exists", packet_exists);
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if (packet_exists) {
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packet = new EthPacketData(16384);
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packet->unserialize(base + ".packet", cp, section);
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}
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bool event_scheduled;
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paramIn(cp, section, base + ".event_scheduled", event_scheduled);
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if (event_scheduled) {
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Tick event_time;
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paramIn(cp, section, base + ".event_time", event_time);
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doneEvent.schedule(event_time);
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}
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}
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LinkDelayEvent::LinkDelayEvent()
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: Event(&mainEventQueue), link(NULL)
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{
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setFlags(AutoSerialize);
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setFlags(AutoDelete);
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}
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LinkDelayEvent::LinkDelayEvent(EtherLink::Link *l, EthPacketPtr p, Tick when)
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: Event(&mainEventQueue), link(l), packet(p)
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{
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setFlags(AutoSerialize);
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setFlags(AutoDelete);
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schedule(when);
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}
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void
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LinkDelayEvent::process()
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{
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link->txComplete(packet);
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}
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void
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LinkDelayEvent::serialize(ostream &os)
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{
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paramOut(os, "type", string("LinkDelayEvent"));
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Event::serialize(os);
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EtherLink *parent = link->parent;
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bool number = link->number;
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SERIALIZE_OBJPTR(parent);
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SERIALIZE_SCALAR(number);
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packet->serialize("packet", os);
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}
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void
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LinkDelayEvent::unserialize(Checkpoint *cp, const string §ion)
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{
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Event::unserialize(cp, section);
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EtherLink *parent;
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bool number;
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UNSERIALIZE_OBJPTR(parent);
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UNSERIALIZE_SCALAR(number);
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link = parent->link[number];
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packet = new EthPacketData(16384);
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packet->unserialize("packet", cp, section);
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}
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Serializable *
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LinkDelayEvent::createForUnserialize(Checkpoint *cp, const string §ion)
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{
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return new LinkDelayEvent();
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}
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REGISTER_SERIALIZEABLE("LinkDelayEvent", LinkDelayEvent)
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EtherLink *
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EtherLinkParams::create()
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{
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return new EtherLink(name, int1, int2, speed, delay, delay_var, dump);
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}
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