packet.cc revision 3260
12568SN/A/* 22568SN/A * Copyright (c) 2006 The Regents of The University of Michigan 32568SN/A * All rights reserved. 42568SN/A * 52568SN/A * Redistribution and use in source and binary forms, with or without 62568SN/A * modification, are permitted provided that the following conditions are 72568SN/A * met: redistributions of source code must retain the above copyright 82568SN/A * notice, this list of conditions and the following disclaimer; 92568SN/A * redistributions in binary form must reproduce the above copyright 102568SN/A * notice, this list of conditions and the following disclaimer in the 112568SN/A * documentation and/or other materials provided with the distribution; 122568SN/A * neither the name of the copyright holders nor the names of its 132568SN/A * contributors may be used to endorse or promote products derived from 142568SN/A * this software without specific prior written permission. 152568SN/A * 162568SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172568SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182568SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192568SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202568SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212568SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222568SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232568SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242568SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252568SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262568SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 292665Ssaidi@eecs.umich.edu * Steve Reinhardt 302568SN/A */ 312568SN/A 322568SN/A/** 332568SN/A * @file 342568SN/A * Definition of the Packet Class, a packet is a transaction occuring 352568SN/A * between a single level of the memory heirarchy (ie L1->L2). 362568SN/A */ 373260Ssaidi@eecs.umich.edu 383260Ssaidi@eecs.umich.edu#include <iostream> 392590SN/A#include "base/misc.hh" 402568SN/A#include "mem/packet.hh" 413260Ssaidi@eecs.umich.edu#include "base/trace.hh" 422568SN/A 432641Sstever@eecs.umich.edustatic const std::string ReadReqString("ReadReq"); 442641Sstever@eecs.umich.edustatic const std::string WriteReqString("WriteReq"); 452641Sstever@eecs.umich.edustatic const std::string WriteReqNoAckString("WriteReqNoAck"); 462641Sstever@eecs.umich.edustatic const std::string ReadRespString("ReadResp"); 472641Sstever@eecs.umich.edustatic const std::string WriteRespString("WriteResp"); 482641Sstever@eecs.umich.edustatic const std::string OtherCmdString("<other>"); 492641Sstever@eecs.umich.edu 502641Sstever@eecs.umich.educonst std::string & 512641Sstever@eecs.umich.eduPacket::cmdString() const 522641Sstever@eecs.umich.edu{ 532641Sstever@eecs.umich.edu switch (cmd) { 542641Sstever@eecs.umich.edu case ReadReq: return ReadReqString; 552641Sstever@eecs.umich.edu case WriteReq: return WriteReqString; 562641Sstever@eecs.umich.edu case WriteReqNoAck: return WriteReqNoAckString; 572641Sstever@eecs.umich.edu case ReadResp: return ReadRespString; 582641Sstever@eecs.umich.edu case WriteResp: return WriteRespString; 592641Sstever@eecs.umich.edu default: return OtherCmdString; 602641Sstever@eecs.umich.edu } 612641Sstever@eecs.umich.edu} 622592SN/A 632811Srdreslin@umich.educonst std::string & 642811Srdreslin@umich.eduPacket::cmdIdxToString(Packet::Command idx) 652811Srdreslin@umich.edu{ 662811Srdreslin@umich.edu switch (idx) { 672811Srdreslin@umich.edu case ReadReq: return ReadReqString; 682811Srdreslin@umich.edu case WriteReq: return WriteReqString; 692811Srdreslin@umich.edu case WriteReqNoAck: return WriteReqNoAckString; 702811Srdreslin@umich.edu case ReadResp: return ReadRespString; 712811Srdreslin@umich.edu case WriteResp: return WriteRespString; 722811Srdreslin@umich.edu default: return OtherCmdString; 732811Srdreslin@umich.edu } 742811Srdreslin@umich.edu} 752811Srdreslin@umich.edu 762592SN/A/** delete the data pointed to in the data pointer. Ok to call to matter how 772592SN/A * data was allocted. */ 782592SN/Avoid 792641Sstever@eecs.umich.eduPacket::deleteData() 802641Sstever@eecs.umich.edu{ 812592SN/A assert(staticData || dynamicData); 822592SN/A if (staticData) 832592SN/A return; 842592SN/A 852592SN/A if (arrayData) 862592SN/A delete [] data; 872592SN/A else 882592SN/A delete data; 892592SN/A} 902592SN/A 912592SN/A/** If there isn't data in the packet, allocate some. */ 922592SN/Avoid 932641Sstever@eecs.umich.eduPacket::allocate() 942641Sstever@eecs.umich.edu{ 952592SN/A if (data) 962592SN/A return; 972592SN/A assert(!staticData); 982592SN/A dynamicData = true; 992592SN/A arrayData = true; 1002641Sstever@eecs.umich.edu data = new uint8_t[getSize()]; 1012592SN/A} 1022592SN/A 1032592SN/A/** Do the packet modify the same addresses. */ 1042592SN/Abool 1052641Sstever@eecs.umich.eduPacket::intersect(Packet *p) 1062641Sstever@eecs.umich.edu{ 1072641Sstever@eecs.umich.edu Addr s1 = getAddr(); 1083242Sgblack@eecs.umich.edu Addr e1 = getAddr() + getSize() - 1; 1092641Sstever@eecs.umich.edu Addr s2 = p->getAddr(); 1103242Sgblack@eecs.umich.edu Addr e2 = p->getAddr() + p->getSize() - 1; 1112592SN/A 1123242Sgblack@eecs.umich.edu return !(s1 > e2 || e1 < s2); 1132592SN/A} 1142592SN/A 1152641Sstever@eecs.umich.edubool 1162641Sstever@eecs.umich.edufixPacket(Packet *func, Packet *timing) 1172641Sstever@eecs.umich.edu{ 1183260Ssaidi@eecs.umich.edu Addr funcStart = func->getAddr(); 1193260Ssaidi@eecs.umich.edu Addr funcEnd = func->getAddr() + func->getSize() - 1; 1203260Ssaidi@eecs.umich.edu Addr timingStart = timing->getAddr(); 1213260Ssaidi@eecs.umich.edu Addr timingEnd = timing->getAddr() + timing->getSize() - 1; 1223260Ssaidi@eecs.umich.edu 1233260Ssaidi@eecs.umich.edu assert(!(funcStart > timingEnd || timingStart < funcEnd)); 1243260Ssaidi@eecs.umich.edu 1253260Ssaidi@eecs.umich.edu if (DTRACE(FunctionalAccess)) { 1263260Ssaidi@eecs.umich.edu DebugOut() << func; 1273260Ssaidi@eecs.umich.edu DebugOut() << timing; 1283260Ssaidi@eecs.umich.edu } 1293260Ssaidi@eecs.umich.edu 1303260Ssaidi@eecs.umich.edu // this packet can't solve our problem, continue on 1313260Ssaidi@eecs.umich.edu if (!timing->hasData()) 1323260Ssaidi@eecs.umich.edu return true; 1333260Ssaidi@eecs.umich.edu 1343260Ssaidi@eecs.umich.edu if (func->isRead()) { 1353260Ssaidi@eecs.umich.edu if (funcStart >= timingStart && funcEnd <= timingEnd) { 1363260Ssaidi@eecs.umich.edu func->allocate(); 1373260Ssaidi@eecs.umich.edu memcpy(func->getPtr<uint8_t>(), timing->getPtr<uint8_t>() + 1383260Ssaidi@eecs.umich.edu funcStart - timingStart, func->getSize()); 1393260Ssaidi@eecs.umich.edu func->result = Packet::Success; 1403260Ssaidi@eecs.umich.edu return false; 1413260Ssaidi@eecs.umich.edu } else { 1423260Ssaidi@eecs.umich.edu // In this case the timing packet only partially satisfies the 1433260Ssaidi@eecs.umich.edu // requset, so we would need more information to make this work. 1443260Ssaidi@eecs.umich.edu // Like bytes valid in the packet or something, so the request could 1453260Ssaidi@eecs.umich.edu // continue and get this bit of possibly newer data along with the 1463260Ssaidi@eecs.umich.edu // older data not written to yet. 1473260Ssaidi@eecs.umich.edu panic("Timing packet only partially satisfies the functional" 1483260Ssaidi@eecs.umich.edu "request. Now what?"); 1493260Ssaidi@eecs.umich.edu } 1503260Ssaidi@eecs.umich.edu } else if (func->isWrite()) { 1513260Ssaidi@eecs.umich.edu if (funcStart >= timingStart) { 1523260Ssaidi@eecs.umich.edu memcpy(timing->getPtr<uint8_t>() + (funcStart - timingStart), 1533260Ssaidi@eecs.umich.edu func->getPtr<uint8_t>(), 1543260Ssaidi@eecs.umich.edu funcStart - std::min(funcEnd, timingEnd)); 1553260Ssaidi@eecs.umich.edu } else { // timingStart > funcStart 1563260Ssaidi@eecs.umich.edu memcpy(timing->getPtr<uint8_t>(), 1573260Ssaidi@eecs.umich.edu func->getPtr<uint8_t>() + (timingStart - funcStart), 1583260Ssaidi@eecs.umich.edu timingStart - std::min(funcEnd, timingEnd)); 1593260Ssaidi@eecs.umich.edu } 1603260Ssaidi@eecs.umich.edu // we always want to keep going with a write 1613260Ssaidi@eecs.umich.edu return true; 1623260Ssaidi@eecs.umich.edu } else 1633260Ssaidi@eecs.umich.edu panic("Don't know how to handle command type %#x\n", 1643260Ssaidi@eecs.umich.edu func->cmdToIndex()); 1653260Ssaidi@eecs.umich.edu 1662641Sstever@eecs.umich.edu} 1673260Ssaidi@eecs.umich.edu 1683260Ssaidi@eecs.umich.edu 1693260Ssaidi@eecs.umich.edustd::ostream & 1703260Ssaidi@eecs.umich.eduoperator<<(std::ostream &o, const Packet &p) 1713260Ssaidi@eecs.umich.edu{ 1723260Ssaidi@eecs.umich.edu 1733260Ssaidi@eecs.umich.edu o << "[0x"; 1743260Ssaidi@eecs.umich.edu o.setf(std::ios_base::hex, std::ios_base::showbase); 1753260Ssaidi@eecs.umich.edu o << p.getAddr(); 1763260Ssaidi@eecs.umich.edu o.unsetf(std::ios_base::hex| std::ios_base::showbase); 1773260Ssaidi@eecs.umich.edu o << ":"; 1783260Ssaidi@eecs.umich.edu o.setf(std::ios_base::hex, std::ios_base::showbase); 1793260Ssaidi@eecs.umich.edu o << p.getAddr() + p.getSize() - 1 << "] "; 1803260Ssaidi@eecs.umich.edu o.unsetf(std::ios_base::hex| std::ios_base::showbase); 1813260Ssaidi@eecs.umich.edu 1823260Ssaidi@eecs.umich.edu if (p.result == Packet::Success) 1833260Ssaidi@eecs.umich.edu o << "Successful "; 1843260Ssaidi@eecs.umich.edu if (p.result == Packet::BadAddress) 1853260Ssaidi@eecs.umich.edu o << "BadAddress "; 1863260Ssaidi@eecs.umich.edu if (p.result == Packet::Nacked) 1873260Ssaidi@eecs.umich.edu o << "Nacked "; 1883260Ssaidi@eecs.umich.edu if (p.result == Packet::Unknown) 1893260Ssaidi@eecs.umich.edu o << "Inflight "; 1903260Ssaidi@eecs.umich.edu 1913260Ssaidi@eecs.umich.edu if (p.isRead()) 1923260Ssaidi@eecs.umich.edu o << "Read "; 1933260Ssaidi@eecs.umich.edu if (p.isWrite()) 1943260Ssaidi@eecs.umich.edu o << "Read "; 1953260Ssaidi@eecs.umich.edu if (p.isInvalidate()) 1963260Ssaidi@eecs.umich.edu o << "Read "; 1973260Ssaidi@eecs.umich.edu if (p.isRequest()) 1983260Ssaidi@eecs.umich.edu o << "Request "; 1993260Ssaidi@eecs.umich.edu if (p.isResponse()) 2003260Ssaidi@eecs.umich.edu o << "Response "; 2013260Ssaidi@eecs.umich.edu if (p.hasData()) 2023260Ssaidi@eecs.umich.edu o << "w/Data "; 2033260Ssaidi@eecs.umich.edu 2043260Ssaidi@eecs.umich.edu o << std::endl; 2053260Ssaidi@eecs.umich.edu return o; 2063260Ssaidi@eecs.umich.edu} 2073260Ssaidi@eecs.umich.edu 208