e06321091d
For now, there is still a single global event queue, but this is necessary for making the steps towards a parallelized m5.
111 lines
3.3 KiB
C++
111 lines
3.3 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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*/
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/* @file
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* Device module for modelling an ethernet hub
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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/trace.hh"
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#include "dev/etherbus.hh"
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#include "dev/etherdump.hh"
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#include "dev/etherint.hh"
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#include "dev/etherpkt.hh"
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#include "params/EtherBus.hh"
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#include "sim/core.hh"
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using namespace std;
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EtherBus::EtherBus(const Params *p)
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: EtherObject(p), ticksPerByte(p->speed), loopback(p->loopback),
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event(this), sender(0), dump(p->dump)
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{
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}
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void
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EtherBus::txDone()
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{
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devlist_t::iterator i = devlist.begin();
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devlist_t::iterator end = devlist.end();
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DPRINTF(Ethernet, "ethernet packet received: length=%d\n", packet->length);
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DDUMP(EthernetData, packet->data, packet->length);
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while (i != end) {
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if (loopback || *i != sender)
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(*i)->sendPacket(packet);
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++i;
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}
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sender->sendDone();
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if (dump)
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dump->dump(packet);
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sender = 0;
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packet = 0;
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}
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EtherInt*
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EtherBus::getEthPort(const std::string &if_name, int idx)
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{
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panic("Etherbus doesn't work\n");
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}
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bool
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EtherBus::send(EtherInt *sndr, EthPacketPtr &pkt)
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{
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if (busy()) {
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DPRINTF(Ethernet, "ethernet packet not sent, bus busy\n", curTick);
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return false;
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}
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DPRINTF(Ethernet, "ethernet packet sent: length=%d\n", pkt->length);
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DDUMP(EthernetData, pkt->data, pkt->length);
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packet = pkt;
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sender = sndr;
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int delay = (int)ceil(((double)pkt->length * ticksPerByte) + 1.0);
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DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n",
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delay, ticksPerByte);
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schedule(event, curTick + delay);
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return true;
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}
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EtherBus *
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EtherBusParams::create()
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{
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return new EtherBus(this);
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}
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