timing.cc revision 10030
12623SN/A/* 210030SAli.Saidi@ARM.com * Copyright (c) 2010-2013 ARM Limited 37725SAli.Saidi@ARM.com * All rights reserved 47725SAli.Saidi@ARM.com * 57725SAli.Saidi@ARM.com * The license below extends only to copyright in the software and shall 67725SAli.Saidi@ARM.com * not be construed as granting a license to any other intellectual 77725SAli.Saidi@ARM.com * property including but not limited to intellectual property relating 87725SAli.Saidi@ARM.com * to a hardware implementation of the functionality of the software 97725SAli.Saidi@ARM.com * licensed hereunder. You may use the software subject to the license 107725SAli.Saidi@ARM.com * terms below provided that you ensure that this notice is replicated 117725SAli.Saidi@ARM.com * unmodified and in its entirety in all distributions of the software, 127725SAli.Saidi@ARM.com * modified or unmodified, in source code or in binary form. 137725SAli.Saidi@ARM.com * 142623SN/A * Copyright (c) 2002-2005 The Regents of The University of Michigan 152623SN/A * All rights reserved. 162623SN/A * 172623SN/A * Redistribution and use in source and binary forms, with or without 182623SN/A * modification, are permitted provided that the following conditions are 192623SN/A * met: redistributions of source code must retain the above copyright 202623SN/A * notice, this list of conditions and the following disclaimer; 212623SN/A * redistributions in binary form must reproduce the above copyright 222623SN/A * notice, this list of conditions and the following disclaimer in the 232623SN/A * documentation and/or other materials provided with the distribution; 242623SN/A * neither the name of the copyright holders nor the names of its 252623SN/A * contributors may be used to endorse or promote products derived from 262623SN/A * this software without specific prior written permission. 272623SN/A * 282623SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 292623SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 302623SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 312623SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 322623SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 332623SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 342623SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 352623SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 362623SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 372623SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 382623SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 392665Ssaidi@eecs.umich.edu * 402665Ssaidi@eecs.umich.edu * Authors: Steve Reinhardt 412623SN/A */ 422623SN/A 433170Sstever@eecs.umich.edu#include "arch/locked_mem.hh" 448105Sgblack@eecs.umich.edu#include "arch/mmapped_ipr.hh" 452623SN/A#include "arch/utility.hh" 464040Ssaidi@eecs.umich.edu#include "base/bigint.hh" 476658Snate@binkert.org#include "config/the_isa.hh" 488229Snate@binkert.org#include "cpu/simple/timing.hh" 492623SN/A#include "cpu/exetrace.hh" 508232Snate@binkert.org#include "debug/Config.hh" 519152Satgutier@umich.edu#include "debug/Drain.hh" 528232Snate@binkert.org#include "debug/ExecFaulting.hh" 538232Snate@binkert.org#include "debug/SimpleCPU.hh" 543348Sbinkertn@umich.edu#include "mem/packet.hh" 553348Sbinkertn@umich.edu#include "mem/packet_access.hh" 564762Snate@binkert.org#include "params/TimingSimpleCPU.hh" 577678Sgblack@eecs.umich.edu#include "sim/faults.hh" 588779Sgblack@eecs.umich.edu#include "sim/full_system.hh" 592901Ssaidi@eecs.umich.edu#include "sim/system.hh" 602623SN/A 612623SN/Ausing namespace std; 622623SN/Ausing namespace TheISA; 632623SN/A 642623SN/Avoid 652623SN/ATimingSimpleCPU::init() 662623SN/A{ 672623SN/A BaseCPU::init(); 688921Sandreas.hansson@arm.com 698921Sandreas.hansson@arm.com // Initialise the ThreadContext's memory proxies 708921Sandreas.hansson@arm.com tcBase()->initMemProxies(tcBase()); 718921Sandreas.hansson@arm.com 729433SAndreas.Sandberg@ARM.com if (FullSystem && !params()->switched_out) { 738779Sgblack@eecs.umich.edu for (int i = 0; i < threadContexts.size(); ++i) { 748779Sgblack@eecs.umich.edu ThreadContext *tc = threadContexts[i]; 758779Sgblack@eecs.umich.edu // initialize CPU, including PC 768779Sgblack@eecs.umich.edu TheISA::initCPU(tc, _cpuId); 778779Sgblack@eecs.umich.edu } 782623SN/A } 792623SN/A} 802623SN/A 812623SN/Avoid 828707Sandreas.hansson@arm.comTimingSimpleCPU::TimingCPUPort::TickEvent::schedule(PacketPtr _pkt, Tick t) 832948Ssaidi@eecs.umich.edu{ 842948Ssaidi@eecs.umich.edu pkt = _pkt; 855606Snate@binkert.org cpu->schedule(this, t); 862948Ssaidi@eecs.umich.edu} 872948Ssaidi@eecs.umich.edu 885529Snate@binkert.orgTimingSimpleCPU::TimingSimpleCPU(TimingSimpleCPUParams *p) 898707Sandreas.hansson@arm.com : BaseSimpleCPU(p), fetchTranslation(this), icachePort(this), 909179Sandreas.hansson@arm.com dcachePort(this), ifetch_pkt(NULL), dcache_pkt(NULL), previousCycle(0), 919442SAndreas.Sandberg@ARM.com fetchEvent(this), drainManager(NULL) 922623SN/A{ 932623SN/A _status = Idle; 943647Srdreslin@umich.edu 957897Shestness@cs.utexas.edu system->totalNumInsts = 0; 962623SN/A} 972623SN/A 982623SN/A 9910030SAli.Saidi@ARM.com 1002623SN/ATimingSimpleCPU::~TimingSimpleCPU() 1012623SN/A{ 1022623SN/A} 1032623SN/A 1042901Ssaidi@eecs.umich.eduunsigned int 1059342SAndreas.Sandberg@arm.comTimingSimpleCPU::drain(DrainManager *drain_manager) 1062798Sktlim@umich.edu{ 1079448SAndreas.Sandberg@ARM.com assert(!drainManager); 1089448SAndreas.Sandberg@ARM.com if (switchedOut()) 1099448SAndreas.Sandberg@ARM.com return 0; 1109448SAndreas.Sandberg@ARM.com 1119342SAndreas.Sandberg@arm.com if (_status == Idle || 1129448SAndreas.Sandberg@ARM.com (_status == BaseSimpleCPU::Running && isDrained())) { 1139442SAndreas.Sandberg@ARM.com DPRINTF(Drain, "No need to drain.\n"); 1142901Ssaidi@eecs.umich.edu return 0; 1152798Sktlim@umich.edu } else { 1169342SAndreas.Sandberg@arm.com drainManager = drain_manager; 1179442SAndreas.Sandberg@ARM.com DPRINTF(Drain, "Requesting drain: %s\n", pcState()); 1189442SAndreas.Sandberg@ARM.com 1199442SAndreas.Sandberg@ARM.com // The fetch event can become descheduled if a drain didn't 1209442SAndreas.Sandberg@ARM.com // succeed on the first attempt. We need to reschedule it if 1219442SAndreas.Sandberg@ARM.com // the CPU is waiting for a microcode routine to complete. 1229448SAndreas.Sandberg@ARM.com if (_status == BaseSimpleCPU::Running && !fetchEvent.scheduled()) 1239648Sdam.sunwoo@arm.com schedule(fetchEvent, clockEdge()); 1249442SAndreas.Sandberg@ARM.com 1252901Ssaidi@eecs.umich.edu return 1; 1262798Sktlim@umich.edu } 1272623SN/A} 1282623SN/A 1292623SN/Avoid 1309342SAndreas.Sandberg@arm.comTimingSimpleCPU::drainResume() 1312623SN/A{ 1329442SAndreas.Sandberg@ARM.com assert(!fetchEvent.scheduled()); 1339448SAndreas.Sandberg@ARM.com assert(!drainManager); 1349448SAndreas.Sandberg@ARM.com if (switchedOut()) 1359448SAndreas.Sandberg@ARM.com return; 1369442SAndreas.Sandberg@ARM.com 1375221Ssaidi@eecs.umich.edu DPRINTF(SimpleCPU, "Resume\n"); 1389523SAndreas.Sandberg@ARM.com verifyMemoryMode(); 1393201Shsul@eecs.umich.edu 1409448SAndreas.Sandberg@ARM.com assert(!threadContexts.empty()); 1419448SAndreas.Sandberg@ARM.com if (threadContexts.size() > 1) 1429448SAndreas.Sandberg@ARM.com fatal("The timing CPU only supports one thread.\n"); 1439448SAndreas.Sandberg@ARM.com 1449448SAndreas.Sandberg@ARM.com if (thread->status() == ThreadContext::Active) { 1455710Scws3k@cs.virginia.edu schedule(fetchEvent, nextCycle()); 1469448SAndreas.Sandberg@ARM.com _status = BaseSimpleCPU::Running; 1479837Slena@cs.wisc,edu notIdleFraction = 1; 1489448SAndreas.Sandberg@ARM.com } else { 1499448SAndreas.Sandberg@ARM.com _status = BaseSimpleCPU::Idle; 1509837Slena@cs.wisc,edu notIdleFraction = 0; 1512623SN/A } 1529442SAndreas.Sandberg@ARM.com} 1532798Sktlim@umich.edu 1549442SAndreas.Sandberg@ARM.combool 1559442SAndreas.Sandberg@ARM.comTimingSimpleCPU::tryCompleteDrain() 1569442SAndreas.Sandberg@ARM.com{ 1579442SAndreas.Sandberg@ARM.com if (!drainManager) 1589442SAndreas.Sandberg@ARM.com return false; 1599442SAndreas.Sandberg@ARM.com 1609442SAndreas.Sandberg@ARM.com DPRINTF(Drain, "tryCompleteDrain: %s\n", pcState()); 1619442SAndreas.Sandberg@ARM.com if (!isDrained()) 1629442SAndreas.Sandberg@ARM.com return false; 1639442SAndreas.Sandberg@ARM.com 1649442SAndreas.Sandberg@ARM.com DPRINTF(Drain, "CPU done draining, processing drain event\n"); 1659442SAndreas.Sandberg@ARM.com drainManager->signalDrainDone(); 1669442SAndreas.Sandberg@ARM.com drainManager = NULL; 1679442SAndreas.Sandberg@ARM.com 1689442SAndreas.Sandberg@ARM.com return true; 1692798Sktlim@umich.edu} 1702798Sktlim@umich.edu 1712798Sktlim@umich.eduvoid 1722798Sktlim@umich.eduTimingSimpleCPU::switchOut() 1732798Sktlim@umich.edu{ 1749429SAndreas.Sandberg@ARM.com BaseSimpleCPU::switchOut(); 1759429SAndreas.Sandberg@ARM.com 1769442SAndreas.Sandberg@ARM.com assert(!fetchEvent.scheduled()); 1779342SAndreas.Sandberg@arm.com assert(_status == BaseSimpleCPU::Running || _status == Idle); 1789442SAndreas.Sandberg@ARM.com assert(!stayAtPC); 1799442SAndreas.Sandberg@ARM.com assert(microPC() == 0); 1809442SAndreas.Sandberg@ARM.com 1819179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 1822623SN/A} 1832623SN/A 1842623SN/A 1852623SN/Avoid 1862623SN/ATimingSimpleCPU::takeOverFrom(BaseCPU *oldCPU) 1872623SN/A{ 1889429SAndreas.Sandberg@ARM.com BaseSimpleCPU::takeOverFrom(oldCPU); 1892623SN/A 1909179Sandreas.hansson@arm.com previousCycle = curCycle(); 1912623SN/A} 1922623SN/A 1939523SAndreas.Sandberg@ARM.comvoid 1949523SAndreas.Sandberg@ARM.comTimingSimpleCPU::verifyMemoryMode() const 1959523SAndreas.Sandberg@ARM.com{ 1969524SAndreas.Sandberg@ARM.com if (!system->isTimingMode()) { 1979523SAndreas.Sandberg@ARM.com fatal("The timing CPU requires the memory system to be in " 1989523SAndreas.Sandberg@ARM.com "'timing' mode.\n"); 1999523SAndreas.Sandberg@ARM.com } 2009523SAndreas.Sandberg@ARM.com} 2012623SN/A 2022623SN/Avoid 2039180Sandreas.hansson@arm.comTimingSimpleCPU::activateContext(ThreadID thread_num, Cycles delay) 2042623SN/A{ 2055221Ssaidi@eecs.umich.edu DPRINTF(SimpleCPU, "ActivateContext %d (%d cycles)\n", thread_num, delay); 2065221Ssaidi@eecs.umich.edu 2072623SN/A assert(thread_num == 0); 2082683Sktlim@umich.edu assert(thread); 2092623SN/A 2102623SN/A assert(_status == Idle); 2112623SN/A 2129837Slena@cs.wisc,edu notIdleFraction = 1; 2139342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 2143686Sktlim@umich.edu 2152623SN/A // kick things off by initiating the fetch of the next instruction 2169179Sandreas.hansson@arm.com schedule(fetchEvent, clockEdge(delay)); 2172623SN/A} 2182623SN/A 2192623SN/A 2202623SN/Avoid 2218737Skoansin.tan@gmail.comTimingSimpleCPU::suspendContext(ThreadID thread_num) 2222623SN/A{ 2235221Ssaidi@eecs.umich.edu DPRINTF(SimpleCPU, "SuspendContext %d\n", thread_num); 2245221Ssaidi@eecs.umich.edu 2252623SN/A assert(thread_num == 0); 2262683Sktlim@umich.edu assert(thread); 2272623SN/A 2286043Sgblack@eecs.umich.edu if (_status == Idle) 2296043Sgblack@eecs.umich.edu return; 2306043Sgblack@eecs.umich.edu 2319342SAndreas.Sandberg@arm.com assert(_status == BaseSimpleCPU::Running); 2322623SN/A 2332644Sstever@eecs.umich.edu // just change status to Idle... if status != Running, 2342644Sstever@eecs.umich.edu // completeInst() will not initiate fetch of next instruction. 2352623SN/A 2369837Slena@cs.wisc,edu notIdleFraction = 0; 2372623SN/A _status = Idle; 2382623SN/A} 2392623SN/A 2405728Sgblack@eecs.umich.edubool 2415728Sgblack@eecs.umich.eduTimingSimpleCPU::handleReadPacket(PacketPtr pkt) 2425728Sgblack@eecs.umich.edu{ 2435728Sgblack@eecs.umich.edu RequestPtr req = pkt->req; 2448105Sgblack@eecs.umich.edu if (req->isMmappedIpr()) { 2459180Sandreas.hansson@arm.com Cycles delay = TheISA::handleIprRead(thread->getTC(), pkt); 2469179Sandreas.hansson@arm.com new IprEvent(pkt, this, clockEdge(delay)); 2475728Sgblack@eecs.umich.edu _status = DcacheWaitResponse; 2485728Sgblack@eecs.umich.edu dcache_pkt = NULL; 2498975Sandreas.hansson@arm.com } else if (!dcachePort.sendTimingReq(pkt)) { 2505728Sgblack@eecs.umich.edu _status = DcacheRetry; 2515728Sgblack@eecs.umich.edu dcache_pkt = pkt; 2525728Sgblack@eecs.umich.edu } else { 2535728Sgblack@eecs.umich.edu _status = DcacheWaitResponse; 2545728Sgblack@eecs.umich.edu // memory system takes ownership of packet 2555728Sgblack@eecs.umich.edu dcache_pkt = NULL; 2565728Sgblack@eecs.umich.edu } 2575728Sgblack@eecs.umich.edu return dcache_pkt == NULL; 2585728Sgblack@eecs.umich.edu} 2592623SN/A 2605894Sgblack@eecs.umich.eduvoid 2616973Stjones1@inf.ed.ac.ukTimingSimpleCPU::sendData(RequestPtr req, uint8_t *data, uint64_t *res, 2626973Stjones1@inf.ed.ac.uk bool read) 2635744Sgblack@eecs.umich.edu{ 2645894Sgblack@eecs.umich.edu PacketPtr pkt; 2655894Sgblack@eecs.umich.edu buildPacket(pkt, req, read); 2667691SAli.Saidi@ARM.com pkt->dataDynamicArray<uint8_t>(data); 2675894Sgblack@eecs.umich.edu if (req->getFlags().isSet(Request::NO_ACCESS)) { 2685894Sgblack@eecs.umich.edu assert(!dcache_pkt); 2695894Sgblack@eecs.umich.edu pkt->makeResponse(); 2705894Sgblack@eecs.umich.edu completeDataAccess(pkt); 2715894Sgblack@eecs.umich.edu } else if (read) { 2725894Sgblack@eecs.umich.edu handleReadPacket(pkt); 2735894Sgblack@eecs.umich.edu } else { 2745894Sgblack@eecs.umich.edu bool do_access = true; // flag to suppress cache access 2755894Sgblack@eecs.umich.edu 2766102Sgblack@eecs.umich.edu if (req->isLLSC()) { 27710030SAli.Saidi@ARM.com do_access = TheISA::handleLockedWrite(thread, req, dcachePort.cacheBlockMask); 2785894Sgblack@eecs.umich.edu } else if (req->isCondSwap()) { 2795894Sgblack@eecs.umich.edu assert(res); 2805894Sgblack@eecs.umich.edu req->setExtraData(*res); 2815894Sgblack@eecs.umich.edu } 2825894Sgblack@eecs.umich.edu 2835894Sgblack@eecs.umich.edu if (do_access) { 2845894Sgblack@eecs.umich.edu dcache_pkt = pkt; 2855894Sgblack@eecs.umich.edu handleWritePacket(); 2865894Sgblack@eecs.umich.edu } else { 2875894Sgblack@eecs.umich.edu _status = DcacheWaitResponse; 2885894Sgblack@eecs.umich.edu completeDataAccess(pkt); 2895894Sgblack@eecs.umich.edu } 2905894Sgblack@eecs.umich.edu } 2915894Sgblack@eecs.umich.edu} 2925894Sgblack@eecs.umich.edu 2935894Sgblack@eecs.umich.eduvoid 2946973Stjones1@inf.ed.ac.ukTimingSimpleCPU::sendSplitData(RequestPtr req1, RequestPtr req2, 2956973Stjones1@inf.ed.ac.uk RequestPtr req, uint8_t *data, bool read) 2965894Sgblack@eecs.umich.edu{ 2975894Sgblack@eecs.umich.edu PacketPtr pkt1, pkt2; 2985894Sgblack@eecs.umich.edu buildSplitPacket(pkt1, pkt2, req1, req2, req, data, read); 2995894Sgblack@eecs.umich.edu if (req->getFlags().isSet(Request::NO_ACCESS)) { 3005894Sgblack@eecs.umich.edu assert(!dcache_pkt); 3015894Sgblack@eecs.umich.edu pkt1->makeResponse(); 3025894Sgblack@eecs.umich.edu completeDataAccess(pkt1); 3035894Sgblack@eecs.umich.edu } else if (read) { 3047911Shestness@cs.utexas.edu SplitFragmentSenderState * send_state = 3057911Shestness@cs.utexas.edu dynamic_cast<SplitFragmentSenderState *>(pkt1->senderState); 3065894Sgblack@eecs.umich.edu if (handleReadPacket(pkt1)) { 3075894Sgblack@eecs.umich.edu send_state->clearFromParent(); 3087911Shestness@cs.utexas.edu send_state = dynamic_cast<SplitFragmentSenderState *>( 3097911Shestness@cs.utexas.edu pkt2->senderState); 3105894Sgblack@eecs.umich.edu if (handleReadPacket(pkt2)) { 3115894Sgblack@eecs.umich.edu send_state->clearFromParent(); 3125894Sgblack@eecs.umich.edu } 3135894Sgblack@eecs.umich.edu } 3145894Sgblack@eecs.umich.edu } else { 3155894Sgblack@eecs.umich.edu dcache_pkt = pkt1; 3167911Shestness@cs.utexas.edu SplitFragmentSenderState * send_state = 3177911Shestness@cs.utexas.edu dynamic_cast<SplitFragmentSenderState *>(pkt1->senderState); 3185894Sgblack@eecs.umich.edu if (handleWritePacket()) { 3195894Sgblack@eecs.umich.edu send_state->clearFromParent(); 3205894Sgblack@eecs.umich.edu dcache_pkt = pkt2; 3217911Shestness@cs.utexas.edu send_state = dynamic_cast<SplitFragmentSenderState *>( 3227911Shestness@cs.utexas.edu pkt2->senderState); 3235894Sgblack@eecs.umich.edu if (handleWritePacket()) { 3245894Sgblack@eecs.umich.edu send_state->clearFromParent(); 3255894Sgblack@eecs.umich.edu } 3265894Sgblack@eecs.umich.edu } 3275894Sgblack@eecs.umich.edu } 3285894Sgblack@eecs.umich.edu} 3295894Sgblack@eecs.umich.edu 3305894Sgblack@eecs.umich.eduvoid 3315894Sgblack@eecs.umich.eduTimingSimpleCPU::translationFault(Fault fault) 3325894Sgblack@eecs.umich.edu{ 3336739Sgblack@eecs.umich.edu // fault may be NoFault in cases where a fault is suppressed, 3346739Sgblack@eecs.umich.edu // for instance prefetches. 3359179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 3369179Sandreas.hansson@arm.com previousCycle = curCycle(); 3375894Sgblack@eecs.umich.edu 3385894Sgblack@eecs.umich.edu if (traceData) { 3395894Sgblack@eecs.umich.edu // Since there was a fault, we shouldn't trace this instruction. 3405894Sgblack@eecs.umich.edu delete traceData; 3415894Sgblack@eecs.umich.edu traceData = NULL; 3425744Sgblack@eecs.umich.edu } 3435744Sgblack@eecs.umich.edu 3445894Sgblack@eecs.umich.edu postExecute(); 3455894Sgblack@eecs.umich.edu 3469442SAndreas.Sandberg@ARM.com advanceInst(fault); 3475894Sgblack@eecs.umich.edu} 3485894Sgblack@eecs.umich.edu 3495894Sgblack@eecs.umich.eduvoid 3505894Sgblack@eecs.umich.eduTimingSimpleCPU::buildPacket(PacketPtr &pkt, RequestPtr req, bool read) 3515894Sgblack@eecs.umich.edu{ 3525894Sgblack@eecs.umich.edu MemCmd cmd; 3535894Sgblack@eecs.umich.edu if (read) { 3545894Sgblack@eecs.umich.edu cmd = MemCmd::ReadReq; 3556102Sgblack@eecs.umich.edu if (req->isLLSC()) 3565894Sgblack@eecs.umich.edu cmd = MemCmd::LoadLockedReq; 3575894Sgblack@eecs.umich.edu } else { 3585894Sgblack@eecs.umich.edu cmd = MemCmd::WriteReq; 3596102Sgblack@eecs.umich.edu if (req->isLLSC()) { 3605894Sgblack@eecs.umich.edu cmd = MemCmd::StoreCondReq; 3615894Sgblack@eecs.umich.edu } else if (req->isSwap()) { 3625894Sgblack@eecs.umich.edu cmd = MemCmd::SwapReq; 3635894Sgblack@eecs.umich.edu } 3645894Sgblack@eecs.umich.edu } 3658949Sandreas.hansson@arm.com pkt = new Packet(req, cmd); 3665894Sgblack@eecs.umich.edu} 3675894Sgblack@eecs.umich.edu 3685894Sgblack@eecs.umich.eduvoid 3695894Sgblack@eecs.umich.eduTimingSimpleCPU::buildSplitPacket(PacketPtr &pkt1, PacketPtr &pkt2, 3705894Sgblack@eecs.umich.edu RequestPtr req1, RequestPtr req2, RequestPtr req, 3715894Sgblack@eecs.umich.edu uint8_t *data, bool read) 3725894Sgblack@eecs.umich.edu{ 3735894Sgblack@eecs.umich.edu pkt1 = pkt2 = NULL; 3745894Sgblack@eecs.umich.edu 3758105Sgblack@eecs.umich.edu assert(!req1->isMmappedIpr() && !req2->isMmappedIpr()); 3765744Sgblack@eecs.umich.edu 3775894Sgblack@eecs.umich.edu if (req->getFlags().isSet(Request::NO_ACCESS)) { 3785894Sgblack@eecs.umich.edu buildPacket(pkt1, req, read); 3795894Sgblack@eecs.umich.edu return; 3805894Sgblack@eecs.umich.edu } 3815894Sgblack@eecs.umich.edu 3825894Sgblack@eecs.umich.edu buildPacket(pkt1, req1, read); 3835894Sgblack@eecs.umich.edu buildPacket(pkt2, req2, read); 3845894Sgblack@eecs.umich.edu 3858832SAli.Saidi@ARM.com req->setPhys(req1->getPaddr(), req->getSize(), req1->getFlags(), dataMasterId()); 3868949Sandreas.hansson@arm.com PacketPtr pkt = new Packet(req, pkt1->cmd.responseCommand()); 3875744Sgblack@eecs.umich.edu 3887691SAli.Saidi@ARM.com pkt->dataDynamicArray<uint8_t>(data); 3895744Sgblack@eecs.umich.edu pkt1->dataStatic<uint8_t>(data); 3905744Sgblack@eecs.umich.edu pkt2->dataStatic<uint8_t>(data + req1->getSize()); 3915744Sgblack@eecs.umich.edu 3925744Sgblack@eecs.umich.edu SplitMainSenderState * main_send_state = new SplitMainSenderState; 3935744Sgblack@eecs.umich.edu pkt->senderState = main_send_state; 3945744Sgblack@eecs.umich.edu main_send_state->fragments[0] = pkt1; 3955744Sgblack@eecs.umich.edu main_send_state->fragments[1] = pkt2; 3965744Sgblack@eecs.umich.edu main_send_state->outstanding = 2; 3975744Sgblack@eecs.umich.edu pkt1->senderState = new SplitFragmentSenderState(pkt, 0); 3985744Sgblack@eecs.umich.edu pkt2->senderState = new SplitFragmentSenderState(pkt, 1); 3995744Sgblack@eecs.umich.edu} 4005744Sgblack@eecs.umich.edu 4012623SN/AFault 4028444Sgblack@eecs.umich.eduTimingSimpleCPU::readMem(Addr addr, uint8_t *data, 4038444Sgblack@eecs.umich.edu unsigned size, unsigned flags) 4042623SN/A{ 4055728Sgblack@eecs.umich.edu Fault fault; 4065728Sgblack@eecs.umich.edu const int asid = 0; 4076221Snate@binkert.org const ThreadID tid = 0; 4087720Sgblack@eecs.umich.edu const Addr pc = thread->instAddr(); 4099814Sandreas.hansson@arm.com unsigned block_size = cacheLineSize(); 4106973Stjones1@inf.ed.ac.uk BaseTLB::Mode mode = BaseTLB::Read; 4112623SN/A 4127045Ssteve.reinhardt@amd.com if (traceData) { 4137045Ssteve.reinhardt@amd.com traceData->setAddr(addr); 4147045Ssteve.reinhardt@amd.com } 4157045Ssteve.reinhardt@amd.com 4167520Sgblack@eecs.umich.edu RequestPtr req = new Request(asid, addr, size, 4178832SAli.Saidi@ARM.com flags, dataMasterId(), pc, _cpuId, tid); 4185728Sgblack@eecs.umich.edu 41910024Sdam.sunwoo@arm.com req->taskId(taskId()); 42010024Sdam.sunwoo@arm.com 4217520Sgblack@eecs.umich.edu Addr split_addr = roundDown(addr + size - 1, block_size); 4225744Sgblack@eecs.umich.edu assert(split_addr <= addr || split_addr - addr < block_size); 4235728Sgblack@eecs.umich.edu 4245894Sgblack@eecs.umich.edu _status = DTBWaitResponse; 4255744Sgblack@eecs.umich.edu if (split_addr > addr) { 4265894Sgblack@eecs.umich.edu RequestPtr req1, req2; 4276102Sgblack@eecs.umich.edu assert(!req->isLLSC() && !req->isSwap()); 4285894Sgblack@eecs.umich.edu req->splitOnVaddr(split_addr, req1, req2); 4295894Sgblack@eecs.umich.edu 4306973Stjones1@inf.ed.ac.uk WholeTranslationState *state = 4317520Sgblack@eecs.umich.edu new WholeTranslationState(req, req1, req2, new uint8_t[size], 4326973Stjones1@inf.ed.ac.uk NULL, mode); 4338486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *trans1 = 4348486Sgblack@eecs.umich.edu new DataTranslation<TimingSimpleCPU *>(this, state, 0); 4358486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *trans2 = 4368486Sgblack@eecs.umich.edu new DataTranslation<TimingSimpleCPU *>(this, state, 1); 4376973Stjones1@inf.ed.ac.uk 4386973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req1, tc, trans1, mode); 4396973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req2, tc, trans2, mode); 4405744Sgblack@eecs.umich.edu } else { 4416973Stjones1@inf.ed.ac.uk WholeTranslationState *state = 4427520Sgblack@eecs.umich.edu new WholeTranslationState(req, new uint8_t[size], NULL, mode); 4438486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *translation 4448486Sgblack@eecs.umich.edu = new DataTranslation<TimingSimpleCPU *>(this, state); 4456973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req, tc, translation, mode); 4462623SN/A } 4472623SN/A 4485728Sgblack@eecs.umich.edu return NoFault; 4492623SN/A} 4502623SN/A 4515728Sgblack@eecs.umich.edubool 4525728Sgblack@eecs.umich.eduTimingSimpleCPU::handleWritePacket() 4535728Sgblack@eecs.umich.edu{ 4545728Sgblack@eecs.umich.edu RequestPtr req = dcache_pkt->req; 4558105Sgblack@eecs.umich.edu if (req->isMmappedIpr()) { 4569180Sandreas.hansson@arm.com Cycles delay = TheISA::handleIprWrite(thread->getTC(), dcache_pkt); 4579179Sandreas.hansson@arm.com new IprEvent(dcache_pkt, this, clockEdge(delay)); 4585728Sgblack@eecs.umich.edu _status = DcacheWaitResponse; 4595728Sgblack@eecs.umich.edu dcache_pkt = NULL; 4608975Sandreas.hansson@arm.com } else if (!dcachePort.sendTimingReq(dcache_pkt)) { 4615728Sgblack@eecs.umich.edu _status = DcacheRetry; 4625728Sgblack@eecs.umich.edu } else { 4635728Sgblack@eecs.umich.edu _status = DcacheWaitResponse; 4645728Sgblack@eecs.umich.edu // memory system takes ownership of packet 4655728Sgblack@eecs.umich.edu dcache_pkt = NULL; 4665728Sgblack@eecs.umich.edu } 4675728Sgblack@eecs.umich.edu return dcache_pkt == NULL; 4685728Sgblack@eecs.umich.edu} 4692623SN/A 4702623SN/AFault 4718444Sgblack@eecs.umich.eduTimingSimpleCPU::writeMem(uint8_t *data, unsigned size, 4728444Sgblack@eecs.umich.edu Addr addr, unsigned flags, uint64_t *res) 4732623SN/A{ 4748443Sgblack@eecs.umich.edu uint8_t *newData = new uint8_t[size]; 4758443Sgblack@eecs.umich.edu memcpy(newData, data, size); 4768443Sgblack@eecs.umich.edu 4775728Sgblack@eecs.umich.edu const int asid = 0; 4786221Snate@binkert.org const ThreadID tid = 0; 4797720Sgblack@eecs.umich.edu const Addr pc = thread->instAddr(); 4809814Sandreas.hansson@arm.com unsigned block_size = cacheLineSize(); 4816973Stjones1@inf.ed.ac.uk BaseTLB::Mode mode = BaseTLB::Write; 4823169Sstever@eecs.umich.edu 4837045Ssteve.reinhardt@amd.com if (traceData) { 4847045Ssteve.reinhardt@amd.com traceData->setAddr(addr); 4857045Ssteve.reinhardt@amd.com } 4867045Ssteve.reinhardt@amd.com 4877520Sgblack@eecs.umich.edu RequestPtr req = new Request(asid, addr, size, 4888832SAli.Saidi@ARM.com flags, dataMasterId(), pc, _cpuId, tid); 4895728Sgblack@eecs.umich.edu 49010024Sdam.sunwoo@arm.com req->taskId(taskId()); 49110024Sdam.sunwoo@arm.com 4927520Sgblack@eecs.umich.edu Addr split_addr = roundDown(addr + size - 1, block_size); 4935744Sgblack@eecs.umich.edu assert(split_addr <= addr || split_addr - addr < block_size); 4945728Sgblack@eecs.umich.edu 4955894Sgblack@eecs.umich.edu _status = DTBWaitResponse; 4965744Sgblack@eecs.umich.edu if (split_addr > addr) { 4975894Sgblack@eecs.umich.edu RequestPtr req1, req2; 4986102Sgblack@eecs.umich.edu assert(!req->isLLSC() && !req->isSwap()); 4995894Sgblack@eecs.umich.edu req->splitOnVaddr(split_addr, req1, req2); 5005894Sgblack@eecs.umich.edu 5016973Stjones1@inf.ed.ac.uk WholeTranslationState *state = 5028443Sgblack@eecs.umich.edu new WholeTranslationState(req, req1, req2, newData, res, mode); 5038486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *trans1 = 5048486Sgblack@eecs.umich.edu new DataTranslation<TimingSimpleCPU *>(this, state, 0); 5058486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *trans2 = 5068486Sgblack@eecs.umich.edu new DataTranslation<TimingSimpleCPU *>(this, state, 1); 5076973Stjones1@inf.ed.ac.uk 5086973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req1, tc, trans1, mode); 5096973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req2, tc, trans2, mode); 5105744Sgblack@eecs.umich.edu } else { 5116973Stjones1@inf.ed.ac.uk WholeTranslationState *state = 5128443Sgblack@eecs.umich.edu new WholeTranslationState(req, newData, res, mode); 5138486Sgblack@eecs.umich.edu DataTranslation<TimingSimpleCPU *> *translation = 5148486Sgblack@eecs.umich.edu new DataTranslation<TimingSimpleCPU *>(this, state); 5156973Stjones1@inf.ed.ac.uk thread->dtb->translateTiming(req, tc, translation, mode); 5162623SN/A } 5172623SN/A 5187045Ssteve.reinhardt@amd.com // Translation faults will be returned via finishTranslation() 5195728Sgblack@eecs.umich.edu return NoFault; 5202623SN/A} 5212623SN/A 5222623SN/A 5232623SN/Avoid 5246973Stjones1@inf.ed.ac.ukTimingSimpleCPU::finishTranslation(WholeTranslationState *state) 5256973Stjones1@inf.ed.ac.uk{ 5269342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 5276973Stjones1@inf.ed.ac.uk 5286973Stjones1@inf.ed.ac.uk if (state->getFault() != NoFault) { 5296973Stjones1@inf.ed.ac.uk if (state->isPrefetch()) { 5306973Stjones1@inf.ed.ac.uk state->setNoFault(); 5316973Stjones1@inf.ed.ac.uk } 5327691SAli.Saidi@ARM.com delete [] state->data; 5336973Stjones1@inf.ed.ac.uk state->deleteReqs(); 5346973Stjones1@inf.ed.ac.uk translationFault(state->getFault()); 5356973Stjones1@inf.ed.ac.uk } else { 5366973Stjones1@inf.ed.ac.uk if (!state->isSplit) { 5376973Stjones1@inf.ed.ac.uk sendData(state->mainReq, state->data, state->res, 5386973Stjones1@inf.ed.ac.uk state->mode == BaseTLB::Read); 5396973Stjones1@inf.ed.ac.uk } else { 5406973Stjones1@inf.ed.ac.uk sendSplitData(state->sreqLow, state->sreqHigh, state->mainReq, 5416973Stjones1@inf.ed.ac.uk state->data, state->mode == BaseTLB::Read); 5426973Stjones1@inf.ed.ac.uk } 5436973Stjones1@inf.ed.ac.uk } 5446973Stjones1@inf.ed.ac.uk 5456973Stjones1@inf.ed.ac.uk delete state; 5466973Stjones1@inf.ed.ac.uk} 5476973Stjones1@inf.ed.ac.uk 5486973Stjones1@inf.ed.ac.uk 5496973Stjones1@inf.ed.ac.ukvoid 5502623SN/ATimingSimpleCPU::fetch() 5512623SN/A{ 5525221Ssaidi@eecs.umich.edu DPRINTF(SimpleCPU, "Fetch\n"); 5535221Ssaidi@eecs.umich.edu 5543387Sgblack@eecs.umich.edu if (!curStaticInst || !curStaticInst->isDelayedCommit()) 5553387Sgblack@eecs.umich.edu checkForInterrupts(); 5562631SN/A 5575348Ssaidi@eecs.umich.edu checkPcEventQueue(); 5585348Ssaidi@eecs.umich.edu 5598143SAli.Saidi@ARM.com // We must have just got suspended by a PC event 5608143SAli.Saidi@ARM.com if (_status == Idle) 5618143SAli.Saidi@ARM.com return; 5628143SAli.Saidi@ARM.com 5637720Sgblack@eecs.umich.edu TheISA::PCState pcState = thread->pcState(); 5647720Sgblack@eecs.umich.edu bool needToFetch = !isRomMicroPC(pcState.microPC()) && !curMacroStaticInst; 5652623SN/A 5667720Sgblack@eecs.umich.edu if (needToFetch) { 5679342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 5685669Sgblack@eecs.umich.edu Request *ifetch_req = new Request(); 56910024Sdam.sunwoo@arm.com ifetch_req->taskId(taskId()); 5705712Shsul@eecs.umich.edu ifetch_req->setThreadContext(_cpuId, /* thread ID */ 0); 5715894Sgblack@eecs.umich.edu setupFetchRequest(ifetch_req); 5728277SAli.Saidi@ARM.com DPRINTF(SimpleCPU, "Translating address %#x\n", ifetch_req->getVaddr()); 5736023Snate@binkert.org thread->itb->translateTiming(ifetch_req, tc, &fetchTranslation, 5746023Snate@binkert.org BaseTLB::Execute); 5752623SN/A } else { 5765669Sgblack@eecs.umich.edu _status = IcacheWaitResponse; 5775669Sgblack@eecs.umich.edu completeIfetch(NULL); 5785894Sgblack@eecs.umich.edu 5799179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 5809179Sandreas.hansson@arm.com previousCycle = curCycle(); 5815894Sgblack@eecs.umich.edu } 5825894Sgblack@eecs.umich.edu} 5835894Sgblack@eecs.umich.edu 5845894Sgblack@eecs.umich.edu 5855894Sgblack@eecs.umich.eduvoid 5865894Sgblack@eecs.umich.eduTimingSimpleCPU::sendFetch(Fault fault, RequestPtr req, ThreadContext *tc) 5875894Sgblack@eecs.umich.edu{ 5885894Sgblack@eecs.umich.edu if (fault == NoFault) { 5898277SAli.Saidi@ARM.com DPRINTF(SimpleCPU, "Sending fetch for addr %#x(pa: %#x)\n", 5908277SAli.Saidi@ARM.com req->getVaddr(), req->getPaddr()); 5918949Sandreas.hansson@arm.com ifetch_pkt = new Packet(req, MemCmd::ReadReq); 5925894Sgblack@eecs.umich.edu ifetch_pkt->dataStatic(&inst); 5938277SAli.Saidi@ARM.com DPRINTF(SimpleCPU, " -- pkt addr: %#x\n", ifetch_pkt->getAddr()); 5945894Sgblack@eecs.umich.edu 5958975Sandreas.hansson@arm.com if (!icachePort.sendTimingReq(ifetch_pkt)) { 5965894Sgblack@eecs.umich.edu // Need to wait for retry 5975894Sgblack@eecs.umich.edu _status = IcacheRetry; 5985894Sgblack@eecs.umich.edu } else { 5995894Sgblack@eecs.umich.edu // Need to wait for cache to respond 6005894Sgblack@eecs.umich.edu _status = IcacheWaitResponse; 6015894Sgblack@eecs.umich.edu // ownership of packet transferred to memory system 6025894Sgblack@eecs.umich.edu ifetch_pkt = NULL; 6035894Sgblack@eecs.umich.edu } 6045894Sgblack@eecs.umich.edu } else { 6058277SAli.Saidi@ARM.com DPRINTF(SimpleCPU, "Translation of addr %#x faulted\n", req->getVaddr()); 6065894Sgblack@eecs.umich.edu delete req; 6075894Sgblack@eecs.umich.edu // fetch fault: advance directly to next instruction (fault handler) 6089342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 6095894Sgblack@eecs.umich.edu advanceInst(fault); 6102623SN/A } 6113222Sktlim@umich.edu 6129179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 6139179Sandreas.hansson@arm.com previousCycle = curCycle(); 6142623SN/A} 6152623SN/A 6162623SN/A 6172623SN/Avoid 6182644Sstever@eecs.umich.eduTimingSimpleCPU::advanceInst(Fault fault) 6192623SN/A{ 6208276SAli.Saidi@ARM.com if (_status == Faulting) 6218276SAli.Saidi@ARM.com return; 6228276SAli.Saidi@ARM.com 6238276SAli.Saidi@ARM.com if (fault != NoFault) { 6248276SAli.Saidi@ARM.com advancePC(fault); 6258276SAli.Saidi@ARM.com DPRINTF(SimpleCPU, "Fault occured, scheduling fetch event\n"); 6269648Sdam.sunwoo@arm.com reschedule(fetchEvent, clockEdge(), true); 6278276SAli.Saidi@ARM.com _status = Faulting; 6288276SAli.Saidi@ARM.com return; 6298276SAli.Saidi@ARM.com } 6308276SAli.Saidi@ARM.com 6318276SAli.Saidi@ARM.com 6328276SAli.Saidi@ARM.com if (!stayAtPC) 6335726Sgblack@eecs.umich.edu advancePC(fault); 6342623SN/A 6359442SAndreas.Sandberg@ARM.com if (tryCompleteDrain()) 6369442SAndreas.Sandberg@ARM.com return; 6379442SAndreas.Sandberg@ARM.com 6389342SAndreas.Sandberg@arm.com if (_status == BaseSimpleCPU::Running) { 6392631SN/A // kick off fetch of next instruction... callback from icache 6402631SN/A // response will cause that instruction to be executed, 6412631SN/A // keeping the CPU running. 6422631SN/A fetch(); 6432631SN/A } 6442623SN/A} 6452623SN/A 6462623SN/A 6472623SN/Avoid 6483349Sbinkertn@umich.eduTimingSimpleCPU::completeIfetch(PacketPtr pkt) 6492623SN/A{ 6508277SAli.Saidi@ARM.com DPRINTF(SimpleCPU, "Complete ICache Fetch for addr %#x\n", pkt ? 6518277SAli.Saidi@ARM.com pkt->getAddr() : 0); 6528277SAli.Saidi@ARM.com 6532623SN/A // received a response from the icache: execute the received 6542623SN/A // instruction 6555669Sgblack@eecs.umich.edu assert(!pkt || !pkt->isError()); 6562623SN/A assert(_status == IcacheWaitResponse); 6572798Sktlim@umich.edu 6589342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 6592644Sstever@eecs.umich.edu 6609179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 6619179Sandreas.hansson@arm.com previousCycle = curCycle(); 6623222Sktlim@umich.edu 66310020Smatt.horsnell@ARM.com if (pkt) 66410020Smatt.horsnell@ARM.com pkt->req->setAccessLatency(); 66510020Smatt.horsnell@ARM.com 66610020Smatt.horsnell@ARM.com 6672623SN/A preExecute(); 6687725SAli.Saidi@ARM.com if (curStaticInst && curStaticInst->isMemRef()) { 6692623SN/A // load or store: just send to dcache 6702623SN/A Fault fault = curStaticInst->initiateAcc(this, traceData); 6717945SAli.Saidi@ARM.com 6727945SAli.Saidi@ARM.com // If we're not running now the instruction will complete in a dcache 6737945SAli.Saidi@ARM.com // response callback or the instruction faulted and has started an 6747945SAli.Saidi@ARM.com // ifetch 6759342SAndreas.Sandberg@arm.com if (_status == BaseSimpleCPU::Running) { 6765894Sgblack@eecs.umich.edu if (fault != NoFault && traceData) { 6775001Sgblack@eecs.umich.edu // If there was a fault, we shouldn't trace this instruction. 6785001Sgblack@eecs.umich.edu delete traceData; 6795001Sgblack@eecs.umich.edu traceData = NULL; 6803170Sstever@eecs.umich.edu } 6814998Sgblack@eecs.umich.edu 6822644Sstever@eecs.umich.edu postExecute(); 6835103Ssaidi@eecs.umich.edu // @todo remove me after debugging with legion done 6845103Ssaidi@eecs.umich.edu if (curStaticInst && (!curStaticInst->isMicroop() || 6855103Ssaidi@eecs.umich.edu curStaticInst->isFirstMicroop())) 6865103Ssaidi@eecs.umich.edu instCnt++; 6872644Sstever@eecs.umich.edu advanceInst(fault); 6882644Sstever@eecs.umich.edu } 6895726Sgblack@eecs.umich.edu } else if (curStaticInst) { 6902623SN/A // non-memory instruction: execute completely now 6912623SN/A Fault fault = curStaticInst->execute(this, traceData); 6924998Sgblack@eecs.umich.edu 6934998Sgblack@eecs.umich.edu // keep an instruction count 6944998Sgblack@eecs.umich.edu if (fault == NoFault) 6954998Sgblack@eecs.umich.edu countInst(); 6967655Sali.saidi@arm.com else if (traceData && !DTRACE(ExecFaulting)) { 6975001Sgblack@eecs.umich.edu delete traceData; 6985001Sgblack@eecs.umich.edu traceData = NULL; 6995001Sgblack@eecs.umich.edu } 7004998Sgblack@eecs.umich.edu 7012644Sstever@eecs.umich.edu postExecute(); 7025103Ssaidi@eecs.umich.edu // @todo remove me after debugging with legion done 7035103Ssaidi@eecs.umich.edu if (curStaticInst && (!curStaticInst->isMicroop() || 7045103Ssaidi@eecs.umich.edu curStaticInst->isFirstMicroop())) 7055103Ssaidi@eecs.umich.edu instCnt++; 7062644Sstever@eecs.umich.edu advanceInst(fault); 7075726Sgblack@eecs.umich.edu } else { 7085726Sgblack@eecs.umich.edu advanceInst(NoFault); 7092623SN/A } 7103658Sktlim@umich.edu 7115669Sgblack@eecs.umich.edu if (pkt) { 7125669Sgblack@eecs.umich.edu delete pkt->req; 7135669Sgblack@eecs.umich.edu delete pkt; 7145669Sgblack@eecs.umich.edu } 7152623SN/A} 7162623SN/A 7172948Ssaidi@eecs.umich.eduvoid 7182948Ssaidi@eecs.umich.eduTimingSimpleCPU::IcachePort::ITickEvent::process() 7192948Ssaidi@eecs.umich.edu{ 7202948Ssaidi@eecs.umich.edu cpu->completeIfetch(pkt); 7212948Ssaidi@eecs.umich.edu} 7222623SN/A 7232623SN/Abool 7248975Sandreas.hansson@arm.comTimingSimpleCPU::IcachePort::recvTimingResp(PacketPtr pkt) 7252623SN/A{ 7269165Sandreas.hansson@arm.com DPRINTF(SimpleCPU, "Received timing response %#x\n", pkt->getAddr()); 7279165Sandreas.hansson@arm.com // delay processing of returned data until next CPU clock edge 7289648Sdam.sunwoo@arm.com Tick next_tick = cpu->clockEdge(); 7292948Ssaidi@eecs.umich.edu 7309165Sandreas.hansson@arm.com if (next_tick == curTick()) 7319165Sandreas.hansson@arm.com cpu->completeIfetch(pkt); 7329165Sandreas.hansson@arm.com else 7339165Sandreas.hansson@arm.com tickEvent.schedule(pkt, next_tick); 7348948Sandreas.hansson@arm.com 7354433Ssaidi@eecs.umich.edu return true; 7362623SN/A} 7372623SN/A 7382657Ssaidi@eecs.umich.eduvoid 7392623SN/ATimingSimpleCPU::IcachePort::recvRetry() 7402623SN/A{ 7412623SN/A // we shouldn't get a retry unless we have a packet that we're 7422623SN/A // waiting to transmit 7432623SN/A assert(cpu->ifetch_pkt != NULL); 7442623SN/A assert(cpu->_status == IcacheRetry); 7453349Sbinkertn@umich.edu PacketPtr tmp = cpu->ifetch_pkt; 7468975Sandreas.hansson@arm.com if (sendTimingReq(tmp)) { 7472657Ssaidi@eecs.umich.edu cpu->_status = IcacheWaitResponse; 7482657Ssaidi@eecs.umich.edu cpu->ifetch_pkt = NULL; 7492657Ssaidi@eecs.umich.edu } 7502623SN/A} 7512623SN/A 7522623SN/Avoid 7533349Sbinkertn@umich.eduTimingSimpleCPU::completeDataAccess(PacketPtr pkt) 7542623SN/A{ 7552623SN/A // received a response from the dcache: complete the load or store 7562623SN/A // instruction 7574870Sstever@eecs.umich.edu assert(!pkt->isError()); 7587516Shestness@cs.utexas.edu assert(_status == DcacheWaitResponse || _status == DTBWaitResponse || 7597516Shestness@cs.utexas.edu pkt->req->getFlags().isSet(Request::NO_ACCESS)); 7602623SN/A 76110020Smatt.horsnell@ARM.com pkt->req->setAccessLatency(); 7629179Sandreas.hansson@arm.com numCycles += curCycle() - previousCycle; 7639179Sandreas.hansson@arm.com previousCycle = curCycle(); 7643184Srdreslin@umich.edu 7655728Sgblack@eecs.umich.edu if (pkt->senderState) { 7665728Sgblack@eecs.umich.edu SplitFragmentSenderState * send_state = 7675728Sgblack@eecs.umich.edu dynamic_cast<SplitFragmentSenderState *>(pkt->senderState); 7685728Sgblack@eecs.umich.edu assert(send_state); 7695728Sgblack@eecs.umich.edu delete pkt->req; 7705728Sgblack@eecs.umich.edu delete pkt; 7715728Sgblack@eecs.umich.edu PacketPtr big_pkt = send_state->bigPkt; 7725728Sgblack@eecs.umich.edu delete send_state; 7735728Sgblack@eecs.umich.edu 7745728Sgblack@eecs.umich.edu SplitMainSenderState * main_send_state = 7755728Sgblack@eecs.umich.edu dynamic_cast<SplitMainSenderState *>(big_pkt->senderState); 7765728Sgblack@eecs.umich.edu assert(main_send_state); 7775728Sgblack@eecs.umich.edu // Record the fact that this packet is no longer outstanding. 7785728Sgblack@eecs.umich.edu assert(main_send_state->outstanding != 0); 7795728Sgblack@eecs.umich.edu main_send_state->outstanding--; 7805728Sgblack@eecs.umich.edu 7815728Sgblack@eecs.umich.edu if (main_send_state->outstanding) { 7825728Sgblack@eecs.umich.edu return; 7835728Sgblack@eecs.umich.edu } else { 7845728Sgblack@eecs.umich.edu delete main_send_state; 7855728Sgblack@eecs.umich.edu big_pkt->senderState = NULL; 7865728Sgblack@eecs.umich.edu pkt = big_pkt; 7875728Sgblack@eecs.umich.edu } 7885728Sgblack@eecs.umich.edu } 7895728Sgblack@eecs.umich.edu 7909342SAndreas.Sandberg@arm.com _status = BaseSimpleCPU::Running; 7915728Sgblack@eecs.umich.edu 7922623SN/A Fault fault = curStaticInst->completeAcc(pkt, this, traceData); 7932623SN/A 7944998Sgblack@eecs.umich.edu // keep an instruction count 7954998Sgblack@eecs.umich.edu if (fault == NoFault) 7964998Sgblack@eecs.umich.edu countInst(); 7975001Sgblack@eecs.umich.edu else if (traceData) { 7985001Sgblack@eecs.umich.edu // If there was a fault, we shouldn't trace this instruction. 7995001Sgblack@eecs.umich.edu delete traceData; 8005001Sgblack@eecs.umich.edu traceData = NULL; 8015001Sgblack@eecs.umich.edu } 8024998Sgblack@eecs.umich.edu 8035507Sstever@gmail.com // the locked flag may be cleared on the response packet, so check 8045507Sstever@gmail.com // pkt->req and not pkt to see if it was a load-locked 8056102Sgblack@eecs.umich.edu if (pkt->isRead() && pkt->req->isLLSC()) { 8063170Sstever@eecs.umich.edu TheISA::handleLockedRead(thread, pkt->req); 8073170Sstever@eecs.umich.edu } 8083170Sstever@eecs.umich.edu 8092644Sstever@eecs.umich.edu delete pkt->req; 8102644Sstever@eecs.umich.edu delete pkt; 8112644Sstever@eecs.umich.edu 8123184Srdreslin@umich.edu postExecute(); 8133227Sktlim@umich.edu 8142644Sstever@eecs.umich.edu advanceInst(fault); 8152623SN/A} 8162623SN/A 81710030SAli.Saidi@ARM.comvoid 81810030SAli.Saidi@ARM.comTimingSimpleCPU::DcachePort::recvTimingSnoopReq(PacketPtr pkt) 81910030SAli.Saidi@ARM.com{ 82010030SAli.Saidi@ARM.com TheISA::handleLockedSnoop(cpu->thread, pkt, cacheBlockMask); 82110030SAli.Saidi@ARM.com} 82210030SAli.Saidi@ARM.com 82310030SAli.Saidi@ARM.com 8242623SN/Abool 8258975Sandreas.hansson@arm.comTimingSimpleCPU::DcachePort::recvTimingResp(PacketPtr pkt) 8262623SN/A{ 8279165Sandreas.hansson@arm.com // delay processing of returned data until next CPU clock edge 8289648Sdam.sunwoo@arm.com Tick next_tick = cpu->clockEdge(); 8292948Ssaidi@eecs.umich.edu 8309165Sandreas.hansson@arm.com if (next_tick == curTick()) { 8319165Sandreas.hansson@arm.com cpu->completeDataAccess(pkt); 8329165Sandreas.hansson@arm.com } else { 8339165Sandreas.hansson@arm.com if (!tickEvent.scheduled()) { 8349165Sandreas.hansson@arm.com tickEvent.schedule(pkt, next_tick); 8355728Sgblack@eecs.umich.edu } else { 8369165Sandreas.hansson@arm.com // In the case of a split transaction and a cache that is 8379165Sandreas.hansson@arm.com // faster than a CPU we could get two responses before 8389165Sandreas.hansson@arm.com // next_tick expires 8399165Sandreas.hansson@arm.com if (!retryEvent.scheduled()) 8409165Sandreas.hansson@arm.com cpu->schedule(retryEvent, next_tick); 8419165Sandreas.hansson@arm.com return false; 8424433Ssaidi@eecs.umich.edu } 8433310Srdreslin@umich.edu } 8448948Sandreas.hansson@arm.com 8454433Ssaidi@eecs.umich.edu return true; 8462948Ssaidi@eecs.umich.edu} 8472948Ssaidi@eecs.umich.edu 8482948Ssaidi@eecs.umich.eduvoid 8492948Ssaidi@eecs.umich.eduTimingSimpleCPU::DcachePort::DTickEvent::process() 8502948Ssaidi@eecs.umich.edu{ 8512630SN/A cpu->completeDataAccess(pkt); 8522623SN/A} 8532623SN/A 8542657Ssaidi@eecs.umich.eduvoid 8552623SN/ATimingSimpleCPU::DcachePort::recvRetry() 8562623SN/A{ 8572623SN/A // we shouldn't get a retry unless we have a packet that we're 8582623SN/A // waiting to transmit 8592623SN/A assert(cpu->dcache_pkt != NULL); 8602623SN/A assert(cpu->_status == DcacheRetry); 8613349Sbinkertn@umich.edu PacketPtr tmp = cpu->dcache_pkt; 8625728Sgblack@eecs.umich.edu if (tmp->senderState) { 8635728Sgblack@eecs.umich.edu // This is a packet from a split access. 8645728Sgblack@eecs.umich.edu SplitFragmentSenderState * send_state = 8655728Sgblack@eecs.umich.edu dynamic_cast<SplitFragmentSenderState *>(tmp->senderState); 8665728Sgblack@eecs.umich.edu assert(send_state); 8675728Sgblack@eecs.umich.edu PacketPtr big_pkt = send_state->bigPkt; 8685728Sgblack@eecs.umich.edu 8695728Sgblack@eecs.umich.edu SplitMainSenderState * main_send_state = 8705728Sgblack@eecs.umich.edu dynamic_cast<SplitMainSenderState *>(big_pkt->senderState); 8715728Sgblack@eecs.umich.edu assert(main_send_state); 8725728Sgblack@eecs.umich.edu 8738975Sandreas.hansson@arm.com if (sendTimingReq(tmp)) { 8745728Sgblack@eecs.umich.edu // If we were able to send without retrying, record that fact 8755728Sgblack@eecs.umich.edu // and try sending the other fragment. 8765728Sgblack@eecs.umich.edu send_state->clearFromParent(); 8775728Sgblack@eecs.umich.edu int other_index = main_send_state->getPendingFragment(); 8785728Sgblack@eecs.umich.edu if (other_index > 0) { 8795728Sgblack@eecs.umich.edu tmp = main_send_state->fragments[other_index]; 8805728Sgblack@eecs.umich.edu cpu->dcache_pkt = tmp; 8815728Sgblack@eecs.umich.edu if ((big_pkt->isRead() && cpu->handleReadPacket(tmp)) || 8825728Sgblack@eecs.umich.edu (big_pkt->isWrite() && cpu->handleWritePacket())) { 8835728Sgblack@eecs.umich.edu main_send_state->fragments[other_index] = NULL; 8845728Sgblack@eecs.umich.edu } 8855728Sgblack@eecs.umich.edu } else { 8865728Sgblack@eecs.umich.edu cpu->_status = DcacheWaitResponse; 8875728Sgblack@eecs.umich.edu // memory system takes ownership of packet 8885728Sgblack@eecs.umich.edu cpu->dcache_pkt = NULL; 8895728Sgblack@eecs.umich.edu } 8905728Sgblack@eecs.umich.edu } 8918975Sandreas.hansson@arm.com } else if (sendTimingReq(tmp)) { 8922657Ssaidi@eecs.umich.edu cpu->_status = DcacheWaitResponse; 8933170Sstever@eecs.umich.edu // memory system takes ownership of packet 8942657Ssaidi@eecs.umich.edu cpu->dcache_pkt = NULL; 8952657Ssaidi@eecs.umich.edu } 8962623SN/A} 8972623SN/A 8985606Snate@binkert.orgTimingSimpleCPU::IprEvent::IprEvent(Packet *_pkt, TimingSimpleCPU *_cpu, 8995606Snate@binkert.org Tick t) 9005606Snate@binkert.org : pkt(_pkt), cpu(_cpu) 9015103Ssaidi@eecs.umich.edu{ 9025606Snate@binkert.org cpu->schedule(this, t); 9035103Ssaidi@eecs.umich.edu} 9045103Ssaidi@eecs.umich.edu 9055103Ssaidi@eecs.umich.eduvoid 9065103Ssaidi@eecs.umich.eduTimingSimpleCPU::IprEvent::process() 9075103Ssaidi@eecs.umich.edu{ 9085103Ssaidi@eecs.umich.edu cpu->completeDataAccess(pkt); 9095103Ssaidi@eecs.umich.edu} 9105103Ssaidi@eecs.umich.edu 9115103Ssaidi@eecs.umich.educonst char * 9125336Shines@cs.fsu.eduTimingSimpleCPU::IprEvent::description() const 9135103Ssaidi@eecs.umich.edu{ 9145103Ssaidi@eecs.umich.edu return "Timing Simple CPU Delay IPR event"; 9155103Ssaidi@eecs.umich.edu} 9165103Ssaidi@eecs.umich.edu 9172623SN/A 9185315Sstever@gmail.comvoid 9195315Sstever@gmail.comTimingSimpleCPU::printAddr(Addr a) 9205315Sstever@gmail.com{ 9215315Sstever@gmail.com dcachePort.printAddr(a); 9225315Sstever@gmail.com} 9235315Sstever@gmail.com 9245315Sstever@gmail.com 9252623SN/A//////////////////////////////////////////////////////////////////////// 9262623SN/A// 9272623SN/A// TimingSimpleCPU Simulation Object 9282623SN/A// 9294762Snate@binkert.orgTimingSimpleCPU * 9304762Snate@binkert.orgTimingSimpleCPUParams::create() 9312623SN/A{ 9325529Snate@binkert.org numThreads = 1; 9338779Sgblack@eecs.umich.edu if (!FullSystem && workload.size() != 1) 9344762Snate@binkert.org panic("only one workload allowed"); 9355529Snate@binkert.org return new TimingSimpleCPU(this); 9362623SN/A} 937