etherbus.cc revision 11701
12SN/A/* 21762SN/A * Copyright (c) 2002-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665SN/A * 282665SN/A * Authors: Nathan Binkert 292SN/A */ 302SN/A 312SN/A/* @file 322SN/A * Device module for modelling an ethernet hub 332SN/A */ 3411263Sandreas.sandberg@arm.com#include "dev/net/etherbus.hh" 352SN/A 36146SN/A#include <cmath> 372SN/A#include <deque> 382SN/A#include <string> 392SN/A#include <vector> 402SN/A 41146SN/A#include "base/trace.hh" 428232SN/A#include "debug/Ethernet.hh" 438232SN/A#include "debug/EthernetData.hh" 4411263Sandreas.sandberg@arm.com#include "dev/net/etherdump.hh" 4511263Sandreas.sandberg@arm.com#include "dev/net/etherint.hh" 4611263Sandreas.sandberg@arm.com#include "dev/net/etherpkt.hh" 474762SN/A#include "params/EtherBus.hh" 484167SN/A#include "sim/core.hh" 492SN/A 502SN/Ausing namespace std; 512SN/A 524981SN/AEtherBus::EtherBus(const Params *p) 534981SN/A : EtherObject(p), ticksPerByte(p->speed), loopback(p->loopback), 545606SN/A event(this), sender(0), dump(p->dump) 551634SN/A{ 561634SN/A} 572SN/A 582SN/Avoid 592SN/AEtherBus::txDone() 602SN/A{ 612SN/A devlist_t::iterator i = devlist.begin(); 622SN/A devlist_t::iterator end = devlist.end(); 632SN/A 642SN/A DPRINTF(Ethernet, "ethernet packet received: length=%d\n", packet->length); 652SN/A DDUMP(EthernetData, packet->data, packet->length); 662SN/A 672SN/A while (i != end) { 682SN/A if (loopback || *i != sender) 692SN/A (*i)->sendPacket(packet); 702SN/A ++i; 712SN/A } 722SN/A 732SN/A sender->sendDone(); 742SN/A 752SN/A if (dump) 762SN/A dump->dump(packet); 772SN/A 782SN/A sender = 0; 792SN/A packet = 0; 802SN/A} 812SN/A 824981SN/AEtherInt* 834981SN/AEtherBus::getEthPort(const std::string &if_name, int idx) 844981SN/A{ 854981SN/A panic("Etherbus doesn't work\n"); 864981SN/A} 872SN/A 882SN/Abool 892566SN/AEtherBus::send(EtherInt *sndr, EthPacketPtr &pkt) 902SN/A{ 912SN/A if (busy()) { 927823SN/A DPRINTF(Ethernet, "ethernet packet not sent, bus busy\n", curTick()); 932SN/A return false; 942SN/A } 952SN/A 962SN/A DPRINTF(Ethernet, "ethernet packet sent: length=%d\n", pkt->length); 972SN/A DDUMP(EthernetData, pkt->data, pkt->length); 982SN/A 992SN/A packet = pkt; 1002SN/A sender = sndr; 10111701Smichael.lebeane@amd.com int delay = (int)ceil(((double)pkt->simLength * ticksPerByte) + 1.0); 1022SN/A DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n", 1031634SN/A delay, ticksPerByte); 1047823SN/A schedule(event, curTick() + delay); 1052SN/A 1062SN/A return true; 1072SN/A} 1082SN/A 1094762SN/AEtherBus * 1104762SN/AEtherBusParams::create() 1112SN/A{ 1124981SN/A return new EtherBus(this); 1132SN/A} 114