| /* |
| * Copyright (c) 2002-2005 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. |
| * |
| * Authors: Nathan Binkert |
| */ |
| |
| /* @file |
| * Device module for modelling an ethernet hub |
| */ |
| #include "dev/net/etherbus.hh" |
| |
| #include <cmath> |
| #include <deque> |
| #include <string> |
| #include <vector> |
| |
| #include "base/misc.hh" |
| #include "base/trace.hh" |
| #include "debug/Ethernet.hh" |
| #include "debug/EthernetData.hh" |
| #include "dev/net/etherdump.hh" |
| #include "dev/net/etherint.hh" |
| #include "dev/net/etherpkt.hh" |
| #include "params/EtherBus.hh" |
| #include "sim/core.hh" |
| |
| using namespace std; |
| |
| EtherBus::EtherBus(const Params *p) |
| : EtherObject(p), ticksPerByte(p->speed), loopback(p->loopback), |
| event([this]{ txDone(); }, "ethernet bus completion"), |
| sender(0), dump(p->dump) |
| { |
| } |
| |
| void |
| EtherBus::txDone() |
| { |
| devlist_t::iterator i = devlist.begin(); |
| devlist_t::iterator end = devlist.end(); |
| |
| DPRINTF(Ethernet, "ethernet packet received: length=%d\n", packet->length); |
| DDUMP(EthernetData, packet->data, packet->length); |
| |
| while (i != end) { |
| if (loopback || *i != sender) |
| (*i)->sendPacket(packet); |
| ++i; |
| } |
| |
| sender->sendDone(); |
| |
| if (dump) |
| dump->dump(packet); |
| |
| sender = 0; |
| packet = 0; |
| } |
| |
| EtherInt* |
| EtherBus::getEthPort(const std::string &if_name, int idx) |
| { |
| panic("Etherbus doesn't work\n"); |
| } |
| |
| bool |
| EtherBus::send(EtherInt *sndr, EthPacketPtr &pkt) |
| { |
| if (busy()) { |
| DPRINTF(Ethernet, "ethernet packet not sent, bus busy\n", curTick()); |
| return false; |
| } |
| |
| DPRINTF(Ethernet, "ethernet packet sent: length=%d\n", pkt->length); |
| DDUMP(EthernetData, pkt->data, pkt->length); |
| |
| packet = pkt; |
| sender = sndr; |
| int delay = (int)ceil(((double)pkt->simLength * ticksPerByte) + 1.0); |
| DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n", |
| delay, ticksPerByte); |
| schedule(event, curTick() + delay); |
| |
| return true; |
| } |
| |
| EtherBus * |
| EtherBusParams::create() |
| { |
| return new EtherBus(this); |
| } |