packet.cc revision 2665:a124942bacb8
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 * Steve Reinhardt 30 */ 31 32/** 33 * @file 34 * Definition of the Packet Class, a packet is a transaction occuring 35 * between a single level of the memory heirarchy (ie L1->L2). 36 */ 37#include "base/misc.hh" 38#include "mem/packet.hh" 39 40static const std::string ReadReqString("ReadReq"); 41static const std::string WriteReqString("WriteReq"); 42static const std::string WriteReqNoAckString("WriteReqNoAck"); 43static const std::string ReadRespString("ReadResp"); 44static const std::string WriteRespString("WriteResp"); 45static const std::string OtherCmdString("<other>"); 46 47const std::string & 48Packet::cmdString() const 49{ 50 switch (cmd) { 51 case ReadReq: return ReadReqString; 52 case WriteReq: return WriteReqString; 53 case WriteReqNoAck: return WriteReqNoAckString; 54 case ReadResp: return ReadRespString; 55 case WriteResp: return WriteRespString; 56 default: return OtherCmdString; 57 } 58} 59 60/** delete the data pointed to in the data pointer. Ok to call to matter how 61 * data was allocted. */ 62void 63Packet::deleteData() 64{ 65 assert(staticData || dynamicData); 66 if (staticData) 67 return; 68 69 if (arrayData) 70 delete [] data; 71 else 72 delete data; 73} 74 75/** If there isn't data in the packet, allocate some. */ 76void 77Packet::allocate() 78{ 79 if (data) 80 return; 81 assert(!staticData); 82 dynamicData = true; 83 arrayData = true; 84 data = new uint8_t[getSize()]; 85} 86 87/** Do the packet modify the same addresses. */ 88bool 89Packet::intersect(Packet *p) 90{ 91 Addr s1 = getAddr(); 92 Addr e1 = getAddr() + getSize(); 93 Addr s2 = p->getAddr(); 94 Addr e2 = p->getAddr() + p->getSize(); 95 96 if (s1 >= s2 && s1 < e2) 97 return true; 98 if (e1 >= s2 && e1 < e2) 99 return true; 100 return false; 101} 102 103bool 104fixPacket(Packet *func, Packet *timing) 105{ 106 panic("Need to implement!"); 107} 108