packet.cc revision 7465
12568SN/A/* 22568SN/A * Copyright (c) 2006 The Regents of The University of Michigan 37465Ssteve.reinhardt@amd.com * Copyright (c) 2010 Advancec Micro Devices, Inc. 42568SN/A * All rights reserved. 52568SN/A * 62568SN/A * Redistribution and use in source and binary forms, with or without 72568SN/A * modification, are permitted provided that the following conditions are 82568SN/A * met: redistributions of source code must retain the above copyright 92568SN/A * notice, this list of conditions and the following disclaimer; 102568SN/A * redistributions in binary form must reproduce the above copyright 112568SN/A * notice, this list of conditions and the following disclaimer in the 122568SN/A * documentation and/or other materials provided with the distribution; 132568SN/A * neither the name of the copyright holders nor the names of its 142568SN/A * contributors may be used to endorse or promote products derived from 152568SN/A * this software without specific prior written permission. 162568SN/A * 172568SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 182568SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 192568SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 202568SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 212568SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 222568SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 232568SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 242568SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 252568SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 262568SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 272568SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 282665Ssaidi@eecs.umich.edu * 292665Ssaidi@eecs.umich.edu * Authors: Ali Saidi 302665Ssaidi@eecs.umich.edu * Steve Reinhardt 312568SN/A */ 322568SN/A 332568SN/A/** 342568SN/A * @file 352568SN/A * Definition of the Packet Class, a packet is a transaction occuring 362568SN/A * between a single level of the memory heirarchy (ie L1->L2). 372568SN/A */ 383260Ssaidi@eecs.umich.edu 393260Ssaidi@eecs.umich.edu#include <iostream> 403918Ssaidi@eecs.umich.edu#include <cstring> 415314Sstever@gmail.com#include "base/cprintf.hh" 422590SN/A#include "base/misc.hh" 433348Sbinkertn@umich.edu#include "base/trace.hh" 442568SN/A#include "mem/packet.hh" 452568SN/A 465735Snate@binkert.orgusing namespace std; 475735Snate@binkert.org 484022Sstever@eecs.umich.edu// The one downside to bitsets is that static initializers can get ugly. 494022Sstever@eecs.umich.edu#define SET1(a1) (1 << (a1)) 504022Sstever@eecs.umich.edu#define SET2(a1, a2) (SET1(a1) | SET1(a2)) 514022Sstever@eecs.umich.edu#define SET3(a1, a2, a3) (SET2(a1, a2) | SET1(a3)) 524022Sstever@eecs.umich.edu#define SET4(a1, a2, a3, a4) (SET3(a1, a2, a3) | SET1(a4)) 534022Sstever@eecs.umich.edu#define SET5(a1, a2, a3, a4, a5) (SET4(a1, a2, a3, a4) | SET1(a5)) 544022Sstever@eecs.umich.edu#define SET6(a1, a2, a3, a4, a5, a6) (SET5(a1, a2, a3, a4, a5) | SET1(a6)) 552641Sstever@eecs.umich.edu 564022Sstever@eecs.umich.educonst MemCmd::CommandInfo 574022Sstever@eecs.umich.eduMemCmd::commandInfo[] = 582641Sstever@eecs.umich.edu{ 594022Sstever@eecs.umich.edu /* InvalidCmd */ 604022Sstever@eecs.umich.edu { 0, InvalidCmd, "InvalidCmd" }, 614022Sstever@eecs.umich.edu /* ReadReq */ 624022Sstever@eecs.umich.edu { SET3(IsRead, IsRequest, NeedsResponse), ReadResp, "ReadReq" }, 634473Sstever@eecs.umich.edu /* ReadResp */ 644473Sstever@eecs.umich.edu { SET3(IsRead, IsResponse, HasData), InvalidCmd, "ReadResp" }, 655319Sstever@gmail.com /* ReadRespWithInvalidate */ 665319Sstever@gmail.com { SET4(IsRead, IsResponse, HasData, IsInvalidate), 675319Sstever@gmail.com InvalidCmd, "ReadRespWithInvalidate" }, 684022Sstever@eecs.umich.edu /* WriteReq */ 694626Sstever@eecs.umich.edu { SET5(IsWrite, NeedsExclusive, IsRequest, NeedsResponse, HasData), 704022Sstever@eecs.umich.edu WriteResp, "WriteReq" }, 714022Sstever@eecs.umich.edu /* WriteResp */ 724626Sstever@eecs.umich.edu { SET3(IsWrite, NeedsExclusive, IsResponse), InvalidCmd, "WriteResp" }, 734022Sstever@eecs.umich.edu /* Writeback */ 744628Sstever@eecs.umich.edu { SET4(IsWrite, NeedsExclusive, IsRequest, HasData), 754628Sstever@eecs.umich.edu InvalidCmd, "Writeback" }, 764022Sstever@eecs.umich.edu /* SoftPFReq */ 774022Sstever@eecs.umich.edu { SET4(IsRead, IsRequest, IsSWPrefetch, NeedsResponse), 784022Sstever@eecs.umich.edu SoftPFResp, "SoftPFReq" }, 794022Sstever@eecs.umich.edu /* HardPFReq */ 804022Sstever@eecs.umich.edu { SET4(IsRead, IsRequest, IsHWPrefetch, NeedsResponse), 814022Sstever@eecs.umich.edu HardPFResp, "HardPFReq" }, 824022Sstever@eecs.umich.edu /* SoftPFResp */ 834022Sstever@eecs.umich.edu { SET4(IsRead, IsResponse, IsSWPrefetch, HasData), 844022Sstever@eecs.umich.edu InvalidCmd, "SoftPFResp" }, 854022Sstever@eecs.umich.edu /* HardPFResp */ 864022Sstever@eecs.umich.edu { SET4(IsRead, IsResponse, IsHWPrefetch, HasData), 874022Sstever@eecs.umich.edu InvalidCmd, "HardPFResp" }, 884022Sstever@eecs.umich.edu /* WriteInvalidateReq */ 894626Sstever@eecs.umich.edu { SET6(IsWrite, NeedsExclusive, IsInvalidate, 904626Sstever@eecs.umich.edu IsRequest, HasData, NeedsResponse), 914022Sstever@eecs.umich.edu WriteInvalidateResp, "WriteInvalidateReq" }, 924022Sstever@eecs.umich.edu /* WriteInvalidateResp */ 935319Sstever@gmail.com { SET3(IsWrite, NeedsExclusive, IsResponse), 944022Sstever@eecs.umich.edu InvalidCmd, "WriteInvalidateResp" }, 954022Sstever@eecs.umich.edu /* UpgradeReq */ 967465Ssteve.reinhardt@amd.com { SET5(IsInvalidate, NeedsExclusive, IsUpgrade, IsRequest, NeedsResponse), 974628Sstever@eecs.umich.edu UpgradeResp, "UpgradeReq" }, 987465Ssteve.reinhardt@amd.com /* SCUpgradeReq: response could be UpgradeResp or UpgradeFailResp */ 997465Ssteve.reinhardt@amd.com { SET6(IsInvalidate, NeedsExclusive, IsUpgrade, IsLlsc, 1007465Ssteve.reinhardt@amd.com IsRequest, NeedsResponse), 1017465Ssteve.reinhardt@amd.com UpgradeResp, "SCUpgradeReq" }, 1024628Sstever@eecs.umich.edu /* UpgradeResp */ 1037465Ssteve.reinhardt@amd.com { SET3(NeedsExclusive, IsUpgrade, IsResponse), 1047465Ssteve.reinhardt@amd.com InvalidCmd, "UpgradeResp" }, 1057465Ssteve.reinhardt@amd.com /* SCUpgradeFailReq: generates UpgradeFailResp ASAP */ 1067465Ssteve.reinhardt@amd.com { SET5(IsInvalidate, NeedsExclusive, IsLlsc, 1077465Ssteve.reinhardt@amd.com IsRequest, NeedsResponse), 1087465Ssteve.reinhardt@amd.com UpgradeFailResp, "SCUpgradeFailReq" }, 1097465Ssteve.reinhardt@amd.com /* UpgradeFailResp */ 1105319Sstever@gmail.com { SET2(NeedsExclusive, IsResponse), 1117465Ssteve.reinhardt@amd.com InvalidCmd, "UpgradeFailResp" }, 1124022Sstever@eecs.umich.edu /* ReadExReq */ 1134626Sstever@eecs.umich.edu { SET5(IsRead, NeedsExclusive, IsInvalidate, IsRequest, NeedsResponse), 1144022Sstever@eecs.umich.edu ReadExResp, "ReadExReq" }, 1154022Sstever@eecs.umich.edu /* ReadExResp */ 1165319Sstever@gmail.com { SET4(IsRead, NeedsExclusive, IsResponse, HasData), 1174040Ssaidi@eecs.umich.edu InvalidCmd, "ReadExResp" }, 1185507Sstever@gmail.com /* LoadLockedReq: note that we use plain ReadResp as response, so that 1195507Sstever@gmail.com * we can also use ReadRespWithInvalidate when needed */ 1206076Sgblack@eecs.umich.edu { SET4(IsRead, IsLlsc, IsRequest, NeedsResponse), 1215507Sstever@gmail.com ReadResp, "LoadLockedReq" }, 1224626Sstever@eecs.umich.edu /* StoreCondReq */ 1236076Sgblack@eecs.umich.edu { SET6(IsWrite, NeedsExclusive, IsLlsc, 1244626Sstever@eecs.umich.edu IsRequest, NeedsResponse, HasData), 1254626Sstever@eecs.umich.edu StoreCondResp, "StoreCondReq" }, 1264626Sstever@eecs.umich.edu /* StoreCondResp */ 1276076Sgblack@eecs.umich.edu { SET4(IsWrite, NeedsExclusive, IsLlsc, IsResponse), 1284626Sstever@eecs.umich.edu InvalidCmd, "StoreCondResp" }, 1294040Ssaidi@eecs.umich.edu /* SwapReq -- for Swap ldstub type operations */ 1304626Sstever@eecs.umich.edu { SET6(IsRead, IsWrite, NeedsExclusive, IsRequest, HasData, NeedsResponse), 1314040Ssaidi@eecs.umich.edu SwapResp, "SwapReq" }, 1324040Ssaidi@eecs.umich.edu /* SwapResp -- for Swap ldstub type operations */ 1334626Sstever@eecs.umich.edu { SET5(IsRead, IsWrite, NeedsExclusive, IsResponse, HasData), 1344870Sstever@eecs.umich.edu InvalidCmd, "SwapResp" }, 1355650Sgblack@eecs.umich.edu /* IntReq -- for interrupts */ 1365650Sgblack@eecs.umich.edu { SET4(IsWrite, IsRequest, NeedsResponse, HasData), 1376063Sgblack@eecs.umich.edu MessageResp, "MessageReq" }, 1385650Sgblack@eecs.umich.edu /* IntResp -- for interrupts */ 1396063Sgblack@eecs.umich.edu { SET2(IsWrite, IsResponse), InvalidCmd, "MessageResp" }, 1404870Sstever@eecs.umich.edu /* NetworkNackError -- nacked at network layer (not by protocol) */ 1414986Ssaidi@eecs.umich.edu { SET2(IsResponse, IsError), InvalidCmd, "NetworkNackError" }, 1424870Sstever@eecs.umich.edu /* InvalidDestError -- packet dest field invalid */ 1434986Ssaidi@eecs.umich.edu { SET2(IsResponse, IsError), InvalidCmd, "InvalidDestError" }, 1444870Sstever@eecs.umich.edu /* BadAddressError -- memory address invalid */ 1455314Sstever@gmail.com { SET2(IsResponse, IsError), InvalidCmd, "BadAddressError" }, 1465314Sstever@gmail.com /* PrintReq */ 1475314Sstever@gmail.com { SET2(IsRequest, IsPrint), InvalidCmd, "PrintReq" } 1484022Sstever@eecs.umich.edu}; 1492592SN/A 1503607Srdreslin@umich.edubool 1515314Sstever@gmail.comPacket::checkFunctional(Printable *obj, Addr addr, int size, uint8_t *data) 1522641Sstever@eecs.umich.edu{ 1534626Sstever@eecs.umich.edu Addr func_start = getAddr(); 1544626Sstever@eecs.umich.edu Addr func_end = getAddr() + getSize() - 1; 1554626Sstever@eecs.umich.edu Addr val_start = addr; 1564626Sstever@eecs.umich.edu Addr val_end = val_start + size - 1; 1573260Ssaidi@eecs.umich.edu 1584626Sstever@eecs.umich.edu if (func_start > val_end || val_start > func_end) { 1594626Sstever@eecs.umich.edu // no intersection 1604626Sstever@eecs.umich.edu return false; 1614626Sstever@eecs.umich.edu } 1623260Ssaidi@eecs.umich.edu 1635314Sstever@gmail.com // check print first since it doesn't require data 1645314Sstever@gmail.com if (isPrint()) { 1655314Sstever@gmail.com dynamic_cast<PrintReqState*>(senderState)->printObj(obj); 1665314Sstever@gmail.com return false; 1675314Sstever@gmail.com } 1685314Sstever@gmail.com 1695314Sstever@gmail.com // if there's no data, there's no need to look further 1705314Sstever@gmail.com if (!data) { 1715314Sstever@gmail.com return false; 1725314Sstever@gmail.com } 1735314Sstever@gmail.com 1744626Sstever@eecs.umich.edu // offset of functional request into supplied value (could be 1754626Sstever@eecs.umich.edu // negative if partial overlap) 1764626Sstever@eecs.umich.edu int offset = func_start - val_start; 1773260Ssaidi@eecs.umich.edu 1784626Sstever@eecs.umich.edu if (isRead()) { 1794626Sstever@eecs.umich.edu if (func_start >= val_start && func_end <= val_end) { 1804626Sstever@eecs.umich.edu allocate(); 1815735Snate@binkert.org memcpy(getPtr<uint8_t>(), data + offset, getSize()); 1824870Sstever@eecs.umich.edu makeResponse(); 1834626Sstever@eecs.umich.edu return true; 1843260Ssaidi@eecs.umich.edu } else { 1854489Sstever@eecs.umich.edu // In this case the timing packet only partially satisfies 1864489Sstever@eecs.umich.edu // the request, so we would need more information to make 1874489Sstever@eecs.umich.edu // this work. Like bytes valid in the packet or 1884489Sstever@eecs.umich.edu // something, so the request could continue and get this 1894489Sstever@eecs.umich.edu // bit of possibly newer data along with the older data 1904489Sstever@eecs.umich.edu // not written to yet. 1914626Sstever@eecs.umich.edu panic("Memory value only partially satisfies the functional " 1924626Sstever@eecs.umich.edu "request. Now what?"); 1933260Ssaidi@eecs.umich.edu } 1944626Sstever@eecs.umich.edu } else if (isWrite()) { 1954626Sstever@eecs.umich.edu if (offset >= 0) { 1965735Snate@binkert.org memcpy(data + offset, getPtr<uint8_t>(), 1975735Snate@binkert.org (min(func_end, val_end) - func_start) + 1); 1985735Snate@binkert.org } else { 1995735Snate@binkert.org // val_start > func_start 2005735Snate@binkert.org memcpy(data, getPtr<uint8_t>() - offset, 2015735Snate@binkert.org (min(func_end, val_end) - val_start) + 1); 2023260Ssaidi@eecs.umich.edu } 2035314Sstever@gmail.com } else { 2044626Sstever@eecs.umich.edu panic("Don't know how to handle command %s\n", cmdString()); 2055314Sstever@gmail.com } 2065314Sstever@gmail.com 2075314Sstever@gmail.com // keep going with request by default 2085314Sstever@gmail.com return false; 2092641Sstever@eecs.umich.edu} 2103260Ssaidi@eecs.umich.edu 2115314Sstever@gmail.comvoid 2125735Snate@binkert.orgPacket::print(ostream &o, const int verbosity, const string &prefix) const 2133260Ssaidi@eecs.umich.edu{ 2145314Sstever@gmail.com ccprintf(o, "%s[%x:%x] %s\n", prefix, 2155314Sstever@gmail.com getAddr(), getAddr() + getSize() - 1, cmdString()); 2163260Ssaidi@eecs.umich.edu} 2173260Ssaidi@eecs.umich.edu 2185735Snate@binkert.orgPacket::PrintReqState::PrintReqState(ostream &_os, int _verbosity) 2195735Snate@binkert.org : curPrefixPtr(new string("")), os(_os), verbosity(_verbosity) 2205314Sstever@gmail.com{ 2215314Sstever@gmail.com labelStack.push_back(LabelStackEntry("", curPrefixPtr)); 2225314Sstever@gmail.com} 2235314Sstever@gmail.com 2245314Sstever@gmail.comPacket::PrintReqState::~PrintReqState() 2255314Sstever@gmail.com{ 2265314Sstever@gmail.com labelStack.pop_back(); 2275314Sstever@gmail.com assert(labelStack.empty()); 2285314Sstever@gmail.com delete curPrefixPtr; 2295314Sstever@gmail.com} 2305314Sstever@gmail.com 2315314Sstever@gmail.comPacket::PrintReqState:: 2325735Snate@binkert.orgLabelStackEntry::LabelStackEntry(const string &_label, string *_prefix) 2335314Sstever@gmail.com : label(_label), prefix(_prefix), labelPrinted(false) 2345314Sstever@gmail.com{ 2355314Sstever@gmail.com} 2365314Sstever@gmail.com 2375314Sstever@gmail.comvoid 2385735Snate@binkert.orgPacket::PrintReqState::pushLabel(const string &lbl, const string &prefix) 2395314Sstever@gmail.com{ 2405314Sstever@gmail.com labelStack.push_back(LabelStackEntry(lbl, curPrefixPtr)); 2415735Snate@binkert.org curPrefixPtr = new string(*curPrefixPtr); 2425314Sstever@gmail.com *curPrefixPtr += prefix; 2435314Sstever@gmail.com} 2445314Sstever@gmail.com 2455314Sstever@gmail.comvoid 2465314Sstever@gmail.comPacket::PrintReqState::popLabel() 2475314Sstever@gmail.com{ 2485314Sstever@gmail.com delete curPrefixPtr; 2495314Sstever@gmail.com curPrefixPtr = labelStack.back().prefix; 2505314Sstever@gmail.com labelStack.pop_back(); 2515314Sstever@gmail.com assert(!labelStack.empty()); 2525314Sstever@gmail.com} 2535314Sstever@gmail.com 2545314Sstever@gmail.comvoid 2555314Sstever@gmail.comPacket::PrintReqState::printLabels() 2565314Sstever@gmail.com{ 2575314Sstever@gmail.com if (!labelStack.back().labelPrinted) { 2585314Sstever@gmail.com LabelStack::iterator i = labelStack.begin(); 2595314Sstever@gmail.com LabelStack::iterator end = labelStack.end(); 2605314Sstever@gmail.com while (i != end) { 2615314Sstever@gmail.com if (!i->labelPrinted) { 2625314Sstever@gmail.com ccprintf(os, "%s%s\n", *(i->prefix), i->label); 2635314Sstever@gmail.com i->labelPrinted = true; 2645314Sstever@gmail.com } 2655314Sstever@gmail.com i++; 2665314Sstever@gmail.com } 2675314Sstever@gmail.com } 2685314Sstever@gmail.com} 2695314Sstever@gmail.com 2705314Sstever@gmail.com 2715314Sstever@gmail.comvoid 2725314Sstever@gmail.comPacket::PrintReqState::printObj(Printable *obj) 2735314Sstever@gmail.com{ 2745314Sstever@gmail.com printLabels(); 2755314Sstever@gmail.com obj->print(os, verbosity, curPrefix()); 2765314Sstever@gmail.com} 277