tport.cc revision 2914
1/* 2 * Copyright (c) 2006 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: Ali Saidi 29 */ 30 31#include "mem/tport.hh" 32 33void 34SimpleTimingPort::recvRetry() 35{ 36 bool result = true; 37 while (result && transmitList.size()) { 38 result = Port::sendTiming(transmitList.front()); 39 if (result) 40 transmitList.pop_front(); 41 } 42 if (transmitList.size() == 0 && drainEvent) { 43 drainEvent->process(); 44 drainEvent = NULL; 45 } 46} 47 48void 49SimpleTimingPort::SendEvent::process() 50{ 51 port->outTiming--; 52 assert(port->outTiming >= 0); 53 if (port->Port::sendTiming(packet)) 54 if (port->transmitList.size() == 0 && port->drainEvent) { 55 port->drainEvent->process(); 56 port->drainEvent = NULL; 57 } 58 return; 59 60 port->transmitList.push_back(packet); 61} 62 63void 64SimpleTimingPort::resendNacked(Packet *pkt) { 65 pkt->reinitNacked(); 66 if (transmitList.size()) { 67 transmitList.push_front(pkt); 68 } else { 69 if (!Port::sendTiming(pkt)) 70 transmitList.push_front(pkt); 71 } 72}; 73 74 75unsigned int 76SimpleTimingPort::drain(Event *de) 77{ 78 if (outTiming == 0 && transmitList.size() == 0) 79 return 0; 80 drainEvent = de; 81 return 1; 82} 83