packet.cc revision 2641:6d9d837e2032
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 29/** 30 * @file 31 * Definition of the Packet Class, a packet is a transaction occuring 32 * between a single level of the memory heirarchy (ie L1->L2). 33 */ 34#include "base/misc.hh" 35#include "mem/packet.hh" 36 37static const std::string ReadReqString("ReadReq"); 38static const std::string WriteReqString("WriteReq"); 39static const std::string WriteReqNoAckString("WriteReqNoAck"); 40static const std::string ReadRespString("ReadResp"); 41static const std::string WriteRespString("WriteResp"); 42static const std::string OtherCmdString("<other>"); 43 44const std::string & 45Packet::cmdString() const 46{ 47 switch (cmd) { 48 case ReadReq: return ReadReqString; 49 case WriteReq: return WriteReqString; 50 case WriteReqNoAck: return WriteReqNoAckString; 51 case ReadResp: return ReadRespString; 52 case WriteResp: return WriteRespString; 53 default: return OtherCmdString; 54 } 55} 56 57/** delete the data pointed to in the data pointer. Ok to call to matter how 58 * data was allocted. */ 59void 60Packet::deleteData() 61{ 62 assert(staticData || dynamicData); 63 if (staticData) 64 return; 65 66 if (arrayData) 67 delete [] data; 68 else 69 delete data; 70} 71 72/** If there isn't data in the packet, allocate some. */ 73void 74Packet::allocate() 75{ 76 if (data) 77 return; 78 assert(!staticData); 79 dynamicData = true; 80 arrayData = true; 81 data = new uint8_t[getSize()]; 82} 83 84/** Do the packet modify the same addresses. */ 85bool 86Packet::intersect(Packet *p) 87{ 88 Addr s1 = getAddr(); 89 Addr e1 = getAddr() + getSize(); 90 Addr s2 = p->getAddr(); 91 Addr e2 = p->getAddr() + p->getSize(); 92 93 if (s1 >= s2 && s1 < e2) 94 return true; 95 if (e1 >= s2 && e1 < e2) 96 return true; 97 return false; 98} 99 100/** Minimally reset a packet so something like simple cpu can reuse it. */ 101void 102Packet::reset() 103{ 104 result = Unknown; 105 if (dynamicData) { 106 deleteData(); 107 dynamicData = false; 108 arrayData = false; 109 time = curTick; 110 } 111} 112 113 114bool 115fixPacket(Packet *func, Packet *timing) 116{ 117 panic("Need to implement!"); 118} 119