etherbus.cc revision 11263:8dcc6b40f164
1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 */ 30 31/* @file 32 * Device module for modelling an ethernet hub 33 */ 34#include "dev/net/etherbus.hh" 35 36#include <cmath> 37#include <deque> 38#include <string> 39#include <vector> 40 41#include "base/trace.hh" 42#include "debug/Ethernet.hh" 43#include "debug/EthernetData.hh" 44#include "dev/net/etherdump.hh" 45#include "dev/net/etherint.hh" 46#include "dev/net/etherpkt.hh" 47#include "params/EtherBus.hh" 48#include "sim/core.hh" 49 50using namespace std; 51 52EtherBus::EtherBus(const Params *p) 53 : EtherObject(p), ticksPerByte(p->speed), loopback(p->loopback), 54 event(this), sender(0), dump(p->dump) 55{ 56} 57 58void 59EtherBus::txDone() 60{ 61 devlist_t::iterator i = devlist.begin(); 62 devlist_t::iterator end = devlist.end(); 63 64 DPRINTF(Ethernet, "ethernet packet received: length=%d\n", packet->length); 65 DDUMP(EthernetData, packet->data, packet->length); 66 67 while (i != end) { 68 if (loopback || *i != sender) 69 (*i)->sendPacket(packet); 70 ++i; 71 } 72 73 sender->sendDone(); 74 75 if (dump) 76 dump->dump(packet); 77 78 sender = 0; 79 packet = 0; 80} 81 82EtherInt* 83EtherBus::getEthPort(const std::string &if_name, int idx) 84{ 85 panic("Etherbus doesn't work\n"); 86} 87 88bool 89EtherBus::send(EtherInt *sndr, EthPacketPtr &pkt) 90{ 91 if (busy()) { 92 DPRINTF(Ethernet, "ethernet packet not sent, bus busy\n", curTick()); 93 return false; 94 } 95 96 DPRINTF(Ethernet, "ethernet packet sent: length=%d\n", pkt->length); 97 DDUMP(EthernetData, pkt->data, pkt->length); 98 99 packet = pkt; 100 sender = sndr; 101 int delay = (int)ceil(((double)pkt->length * ticksPerByte) + 1.0); 102 DPRINTF(Ethernet, "scheduling packet: delay=%d, (rate=%f)\n", 103 delay, ticksPerByte); 104 schedule(event, curTick() + delay); 105 106 return true; 107} 108 109EtherBus * 110EtherBusParams::create() 111{ 112 return new EtherBus(this); 113} 114