pagetable_walker.cc revision 8096
15245Sgblack@eecs.umich.edu/* 25245Sgblack@eecs.umich.edu * Copyright (c) 2007 The Hewlett-Packard Development Company 35245Sgblack@eecs.umich.edu * All rights reserved. 45245Sgblack@eecs.umich.edu * 57087Snate@binkert.org * The license below extends only to copyright in the software and shall 67087Snate@binkert.org * not be construed as granting a license to any other intellectual 77087Snate@binkert.org * property including but not limited to intellectual property relating 87087Snate@binkert.org * to a hardware implementation of the functionality of the software 97087Snate@binkert.org * licensed hereunder. You may use the software subject to the license 107087Snate@binkert.org * terms below provided that you ensure that this notice is replicated 117087Snate@binkert.org * unmodified and in its entirety in all distributions of the software, 127087Snate@binkert.org * modified or unmodified, in source code or in binary form. 135245Sgblack@eecs.umich.edu * 147087Snate@binkert.org * Redistribution and use in source and binary forms, with or without 157087Snate@binkert.org * modification, are permitted provided that the following conditions are 167087Snate@binkert.org * met: redistributions of source code must retain the above copyright 177087Snate@binkert.org * notice, this list of conditions and the following disclaimer; 187087Snate@binkert.org * redistributions in binary form must reproduce the above copyright 197087Snate@binkert.org * notice, this list of conditions and the following disclaimer in the 207087Snate@binkert.org * documentation and/or other materials provided with the distribution; 217087Snate@binkert.org * neither the name of the copyright holders nor the names of its 225245Sgblack@eecs.umich.edu * contributors may be used to endorse or promote products derived from 237087Snate@binkert.org * this software without specific prior written permission. 245245Sgblack@eecs.umich.edu * 255245Sgblack@eecs.umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 265245Sgblack@eecs.umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 275245Sgblack@eecs.umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 285245Sgblack@eecs.umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 295245Sgblack@eecs.umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 305245Sgblack@eecs.umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 315245Sgblack@eecs.umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 325245Sgblack@eecs.umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 335245Sgblack@eecs.umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 345245Sgblack@eecs.umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 355245Sgblack@eecs.umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 365245Sgblack@eecs.umich.edu * 375245Sgblack@eecs.umich.edu * Authors: Gabe Black 385245Sgblack@eecs.umich.edu */ 395245Sgblack@eecs.umich.edu 405245Sgblack@eecs.umich.edu#include "arch/x86/pagetable.hh" 415245Sgblack@eecs.umich.edu#include "arch/x86/pagetable_walker.hh" 425245Sgblack@eecs.umich.edu#include "arch/x86/tlb.hh" 437912Shestness@cs.utexas.edu#include "arch/x86/vtophys.hh" 445245Sgblack@eecs.umich.edu#include "base/bitfield.hh" 455245Sgblack@eecs.umich.edu#include "cpu/thread_context.hh" 465245Sgblack@eecs.umich.edu#include "cpu/base.hh" 475245Sgblack@eecs.umich.edu#include "mem/packet_access.hh" 485245Sgblack@eecs.umich.edu#include "mem/request.hh" 495245Sgblack@eecs.umich.edu#include "sim/system.hh" 505245Sgblack@eecs.umich.edu 515245Sgblack@eecs.umich.edunamespace X86ISA { 525245Sgblack@eecs.umich.edu 535245Sgblack@eecs.umich.edu// Unfortunately, the placement of the base field in a page table entry is 545245Sgblack@eecs.umich.edu// very erratic and would make a mess here. It might be moved here at some 555245Sgblack@eecs.umich.edu// point in the future. 565245Sgblack@eecs.umich.eduBitUnion64(PageTableEntry) 575245Sgblack@eecs.umich.edu Bitfield<63> nx; 585245Sgblack@eecs.umich.edu Bitfield<11, 9> avl; 595245Sgblack@eecs.umich.edu Bitfield<8> g; 605245Sgblack@eecs.umich.edu Bitfield<7> ps; 615245Sgblack@eecs.umich.edu Bitfield<6> d; 625245Sgblack@eecs.umich.edu Bitfield<5> a; 635245Sgblack@eecs.umich.edu Bitfield<4> pcd; 645245Sgblack@eecs.umich.edu Bitfield<3> pwt; 655245Sgblack@eecs.umich.edu Bitfield<2> u; 665245Sgblack@eecs.umich.edu Bitfield<1> w; 675245Sgblack@eecs.umich.edu Bitfield<0> p; 685245Sgblack@eecs.umich.eduEndBitUnion(PageTableEntry) 695245Sgblack@eecs.umich.edu 705895Sgblack@eecs.umich.eduFault 717912Shestness@cs.utexas.eduWalker::start(ThreadContext * _tc, BaseTLB::Translation *_translation, 727912Shestness@cs.utexas.edu RequestPtr _req, BaseTLB::Mode _mode) 735245Sgblack@eecs.umich.edu{ 747912Shestness@cs.utexas.edu // TODO: in timing mode, instead of blocking when there are other 757912Shestness@cs.utexas.edu // outstanding requests, see if this request can be coalesced with 767912Shestness@cs.utexas.edu // another one (i.e. either coalesce or start walk) 777912Shestness@cs.utexas.edu WalkerState * newState = new WalkerState(this, _translation, _req); 787912Shestness@cs.utexas.edu newState->initState(_tc, _mode, sys->getMemoryMode() == Enums::timing); 797912Shestness@cs.utexas.edu if (currStates.size()) { 807912Shestness@cs.utexas.edu assert(newState->isTiming()); 817912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, "Walks in progress: %d\n", currStates.size()); 827912Shestness@cs.utexas.edu currStates.push_back(newState); 837912Shestness@cs.utexas.edu return NoFault; 847912Shestness@cs.utexas.edu } else { 857912Shestness@cs.utexas.edu currStates.push_back(newState); 867912Shestness@cs.utexas.edu Fault fault = newState->startWalk(); 877912Shestness@cs.utexas.edu if (!newState->isTiming()) { 887912Shestness@cs.utexas.edu currStates.pop_front(); 897912Shestness@cs.utexas.edu delete newState; 905895Sgblack@eecs.umich.edu } 917912Shestness@cs.utexas.edu return fault; 925245Sgblack@eecs.umich.edu } 935245Sgblack@eecs.umich.edu} 945245Sgblack@eecs.umich.edu 955895Sgblack@eecs.umich.eduFault 967912Shestness@cs.utexas.eduWalker::startFunctional(ThreadContext * _tc, Addr &addr, Addr &pageSize, 977912Shestness@cs.utexas.edu BaseTLB::Mode _mode) 985245Sgblack@eecs.umich.edu{ 997912Shestness@cs.utexas.edu funcState.initState(_tc, _mode); 1007912Shestness@cs.utexas.edu return funcState.startFunctional(addr, pageSize); 1015245Sgblack@eecs.umich.edu} 1025245Sgblack@eecs.umich.edu 1035245Sgblack@eecs.umich.edubool 1045245Sgblack@eecs.umich.eduWalker::WalkerPort::recvTiming(PacketPtr pkt) 1055245Sgblack@eecs.umich.edu{ 1065245Sgblack@eecs.umich.edu return walker->recvTiming(pkt); 1075245Sgblack@eecs.umich.edu} 1085245Sgblack@eecs.umich.edu 1095245Sgblack@eecs.umich.edubool 1105245Sgblack@eecs.umich.eduWalker::recvTiming(PacketPtr pkt) 1115245Sgblack@eecs.umich.edu{ 1127912Shestness@cs.utexas.edu if (pkt->isResponse() || pkt->wasNacked()) { 1137912Shestness@cs.utexas.edu WalkerSenderState * senderState = 1147912Shestness@cs.utexas.edu dynamic_cast<WalkerSenderState *>(pkt->senderState); 1157912Shestness@cs.utexas.edu pkt->senderState = senderState->saved; 1167912Shestness@cs.utexas.edu WalkerState * senderWalk = senderState->senderWalk; 1177912Shestness@cs.utexas.edu bool walkComplete = senderWalk->recvPacket(pkt); 1187912Shestness@cs.utexas.edu delete senderState; 1197912Shestness@cs.utexas.edu if (walkComplete) { 1207912Shestness@cs.utexas.edu std::list<WalkerState *>::iterator iter; 1217912Shestness@cs.utexas.edu for (iter = currStates.begin(); iter != currStates.end(); iter++) { 1227912Shestness@cs.utexas.edu WalkerState * walkerState = *(iter); 1237912Shestness@cs.utexas.edu if (walkerState == senderWalk) { 1247912Shestness@cs.utexas.edu iter = currStates.erase(iter); 1257912Shestness@cs.utexas.edu break; 1267912Shestness@cs.utexas.edu } 1275245Sgblack@eecs.umich.edu } 1287912Shestness@cs.utexas.edu delete senderWalk; 1297912Shestness@cs.utexas.edu // Since we block requests when another is outstanding, we 1307912Shestness@cs.utexas.edu // need to check if there is a waiting request to be serviced 1317912Shestness@cs.utexas.edu if (currStates.size()) { 1327912Shestness@cs.utexas.edu WalkerState * newState = currStates.front(); 1337912Shestness@cs.utexas.edu if (!newState->wasStarted()) 1347912Shestness@cs.utexas.edu newState->startWalk(); 1355895Sgblack@eecs.umich.edu } 1365245Sgblack@eecs.umich.edu } 1377912Shestness@cs.utexas.edu } else { 1387912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, "Received strange packet\n"); 1395245Sgblack@eecs.umich.edu } 1405245Sgblack@eecs.umich.edu return true; 1415245Sgblack@eecs.umich.edu} 1425245Sgblack@eecs.umich.edu 1435245Sgblack@eecs.umich.eduTick 1445245Sgblack@eecs.umich.eduWalker::WalkerPort::recvAtomic(PacketPtr pkt) 1455245Sgblack@eecs.umich.edu{ 1465245Sgblack@eecs.umich.edu return 0; 1475245Sgblack@eecs.umich.edu} 1485245Sgblack@eecs.umich.edu 1495245Sgblack@eecs.umich.eduvoid 1505245Sgblack@eecs.umich.eduWalker::WalkerPort::recvFunctional(PacketPtr pkt) 1515245Sgblack@eecs.umich.edu{ 1525245Sgblack@eecs.umich.edu return; 1535245Sgblack@eecs.umich.edu} 1545245Sgblack@eecs.umich.edu 1555245Sgblack@eecs.umich.eduvoid 1565245Sgblack@eecs.umich.eduWalker::WalkerPort::recvStatusChange(Status status) 1575245Sgblack@eecs.umich.edu{ 1585245Sgblack@eecs.umich.edu if (status == RangeChange) { 1595245Sgblack@eecs.umich.edu if (!snoopRangeSent) { 1605245Sgblack@eecs.umich.edu snoopRangeSent = true; 1615245Sgblack@eecs.umich.edu sendStatusChange(Port::RangeChange); 1625245Sgblack@eecs.umich.edu } 1635245Sgblack@eecs.umich.edu return; 1645245Sgblack@eecs.umich.edu } 1655245Sgblack@eecs.umich.edu 1665245Sgblack@eecs.umich.edu panic("Unexpected recvStatusChange.\n"); 1675245Sgblack@eecs.umich.edu} 1685245Sgblack@eecs.umich.edu 1695245Sgblack@eecs.umich.eduvoid 1705245Sgblack@eecs.umich.eduWalker::WalkerPort::recvRetry() 1715245Sgblack@eecs.umich.edu{ 1725245Sgblack@eecs.umich.edu walker->recvRetry(); 1735245Sgblack@eecs.umich.edu} 1745245Sgblack@eecs.umich.edu 1755245Sgblack@eecs.umich.eduvoid 1765245Sgblack@eecs.umich.eduWalker::recvRetry() 1775245Sgblack@eecs.umich.edu{ 1787912Shestness@cs.utexas.edu std::list<WalkerState *>::iterator iter; 1797912Shestness@cs.utexas.edu for (iter = currStates.begin(); iter != currStates.end(); iter++) { 1807912Shestness@cs.utexas.edu WalkerState * walkerState = *(iter); 1817912Shestness@cs.utexas.edu if (walkerState->isRetrying()) { 1827912Shestness@cs.utexas.edu walkerState->retry(); 1837912Shestness@cs.utexas.edu } 1847912Shestness@cs.utexas.edu } 1857912Shestness@cs.utexas.edu} 1867912Shestness@cs.utexas.edu 1877912Shestness@cs.utexas.edubool Walker::sendTiming(WalkerState* sendingState, PacketPtr pkt) 1887912Shestness@cs.utexas.edu{ 1897912Shestness@cs.utexas.edu pkt->senderState = new WalkerSenderState(sendingState, pkt->senderState); 1907912Shestness@cs.utexas.edu return port.sendTiming(pkt); 1917912Shestness@cs.utexas.edu} 1927912Shestness@cs.utexas.edu 1937912Shestness@cs.utexas.eduPort * 1947912Shestness@cs.utexas.eduWalker::getPort(const std::string &if_name, int idx) 1957912Shestness@cs.utexas.edu{ 1967912Shestness@cs.utexas.edu if (if_name == "port") 1977912Shestness@cs.utexas.edu return &port; 1987912Shestness@cs.utexas.edu else 1997912Shestness@cs.utexas.edu panic("No page table walker port named %s!\n", if_name); 2005245Sgblack@eecs.umich.edu} 2015245Sgblack@eecs.umich.edu 2025245Sgblack@eecs.umich.eduvoid 2037912Shestness@cs.utexas.eduWalker::WalkerState::initState(ThreadContext * _tc, 2047912Shestness@cs.utexas.edu BaseTLB::Mode _mode, bool _isTiming) 2057912Shestness@cs.utexas.edu{ 2067912Shestness@cs.utexas.edu assert(state == Ready); 2077912Shestness@cs.utexas.edu started = false; 2087912Shestness@cs.utexas.edu tc = _tc; 2097912Shestness@cs.utexas.edu mode = _mode; 2107912Shestness@cs.utexas.edu timing = _isTiming; 2117912Shestness@cs.utexas.edu} 2127912Shestness@cs.utexas.edu 2137912Shestness@cs.utexas.eduFault 2147912Shestness@cs.utexas.eduWalker::WalkerState::startWalk() 2157912Shestness@cs.utexas.edu{ 2167912Shestness@cs.utexas.edu Fault fault = NoFault; 2177912Shestness@cs.utexas.edu assert(started == false); 2187912Shestness@cs.utexas.edu started = true; 2197912Shestness@cs.utexas.edu setupWalk(req->getVaddr()); 2207912Shestness@cs.utexas.edu if (timing) { 2217912Shestness@cs.utexas.edu nextState = state; 2227912Shestness@cs.utexas.edu state = Waiting; 2237912Shestness@cs.utexas.edu timingFault = NoFault; 2247912Shestness@cs.utexas.edu sendPackets(); 2257912Shestness@cs.utexas.edu } else { 2267912Shestness@cs.utexas.edu do { 2277912Shestness@cs.utexas.edu walker->port.sendAtomic(read); 2287912Shestness@cs.utexas.edu PacketPtr write = NULL; 2297912Shestness@cs.utexas.edu fault = stepWalk(write); 2307912Shestness@cs.utexas.edu assert(fault == NoFault || read == NULL); 2317912Shestness@cs.utexas.edu state = nextState; 2327912Shestness@cs.utexas.edu nextState = Ready; 2337912Shestness@cs.utexas.edu if (write) 2347912Shestness@cs.utexas.edu walker->port.sendAtomic(write); 2357912Shestness@cs.utexas.edu } while(read); 2367912Shestness@cs.utexas.edu state = Ready; 2377912Shestness@cs.utexas.edu nextState = Waiting; 2387912Shestness@cs.utexas.edu } 2397912Shestness@cs.utexas.edu return fault; 2407912Shestness@cs.utexas.edu} 2417912Shestness@cs.utexas.edu 2427912Shestness@cs.utexas.eduFault 2437912Shestness@cs.utexas.eduWalker::WalkerState::startFunctional(Addr &addr, Addr &pageSize) 2447912Shestness@cs.utexas.edu{ 2457912Shestness@cs.utexas.edu Fault fault = NoFault; 2467912Shestness@cs.utexas.edu assert(started == false); 2477912Shestness@cs.utexas.edu started = true; 2487912Shestness@cs.utexas.edu setupWalk(addr); 2497912Shestness@cs.utexas.edu 2507912Shestness@cs.utexas.edu do { 2517912Shestness@cs.utexas.edu walker->port.sendFunctional(read); 2527912Shestness@cs.utexas.edu // On a functional access (page table lookup), writes should 2537912Shestness@cs.utexas.edu // not happen so this pointer is ignored after stepWalk 2547912Shestness@cs.utexas.edu PacketPtr write = NULL; 2557912Shestness@cs.utexas.edu fault = stepWalk(write); 2567912Shestness@cs.utexas.edu assert(fault == NoFault || read == NULL); 2577912Shestness@cs.utexas.edu state = nextState; 2587912Shestness@cs.utexas.edu nextState = Ready; 2597912Shestness@cs.utexas.edu } while(read); 2607912Shestness@cs.utexas.edu pageSize = entry.size; 2617912Shestness@cs.utexas.edu addr = entry.paddr; 2627912Shestness@cs.utexas.edu 2637912Shestness@cs.utexas.edu return fault; 2647912Shestness@cs.utexas.edu} 2657912Shestness@cs.utexas.edu 2667912Shestness@cs.utexas.eduFault 2677912Shestness@cs.utexas.eduWalker::WalkerState::stepWalk(PacketPtr &write) 2687912Shestness@cs.utexas.edu{ 2697912Shestness@cs.utexas.edu assert(state != Ready && state != Waiting); 2707912Shestness@cs.utexas.edu Fault fault = NoFault; 2717912Shestness@cs.utexas.edu write = NULL; 2727912Shestness@cs.utexas.edu PageTableEntry pte; 2737912Shestness@cs.utexas.edu if (dataSize == 8) 2747912Shestness@cs.utexas.edu pte = read->get<uint64_t>(); 2757912Shestness@cs.utexas.edu else 2767912Shestness@cs.utexas.edu pte = read->get<uint32_t>(); 2777912Shestness@cs.utexas.edu VAddr vaddr = entry.vaddr; 2787912Shestness@cs.utexas.edu bool uncacheable = pte.pcd; 2797912Shestness@cs.utexas.edu Addr nextRead = 0; 2807912Shestness@cs.utexas.edu bool doWrite = false; 2817912Shestness@cs.utexas.edu bool doTLBInsert = false; 2827912Shestness@cs.utexas.edu bool doEndWalk = false; 2837912Shestness@cs.utexas.edu bool badNX = pte.nx && mode == BaseTLB::Execute && enableNX; 2847912Shestness@cs.utexas.edu switch(state) { 2857912Shestness@cs.utexas.edu case LongPML4: 2867912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 2877912Shestness@cs.utexas.edu "Got long mode PML4 entry %#016x.\n", (uint64_t)pte); 2887912Shestness@cs.utexas.edu nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.longl3 * dataSize; 2897912Shestness@cs.utexas.edu doWrite = !pte.a; 2907912Shestness@cs.utexas.edu pte.a = 1; 2917912Shestness@cs.utexas.edu entry.writable = pte.w; 2927912Shestness@cs.utexas.edu entry.user = pte.u; 2937912Shestness@cs.utexas.edu if (badNX || !pte.p) { 2947912Shestness@cs.utexas.edu doEndWalk = true; 2957912Shestness@cs.utexas.edu fault = pageFault(pte.p); 2967912Shestness@cs.utexas.edu break; 2977912Shestness@cs.utexas.edu } 2987912Shestness@cs.utexas.edu entry.noExec = pte.nx; 2997912Shestness@cs.utexas.edu nextState = LongPDP; 3007912Shestness@cs.utexas.edu break; 3017912Shestness@cs.utexas.edu case LongPDP: 3027912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 3037912Shestness@cs.utexas.edu "Got long mode PDP entry %#016x.\n", (uint64_t)pte); 3047912Shestness@cs.utexas.edu nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.longl2 * dataSize; 3057912Shestness@cs.utexas.edu doWrite = !pte.a; 3067912Shestness@cs.utexas.edu pte.a = 1; 3077912Shestness@cs.utexas.edu entry.writable = entry.writable && pte.w; 3087912Shestness@cs.utexas.edu entry.user = entry.user && pte.u; 3097912Shestness@cs.utexas.edu if (badNX || !pte.p) { 3107912Shestness@cs.utexas.edu doEndWalk = true; 3117912Shestness@cs.utexas.edu fault = pageFault(pte.p); 3127912Shestness@cs.utexas.edu break; 3137912Shestness@cs.utexas.edu } 3147912Shestness@cs.utexas.edu nextState = LongPD; 3157912Shestness@cs.utexas.edu break; 3167912Shestness@cs.utexas.edu case LongPD: 3177912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 3187912Shestness@cs.utexas.edu "Got long mode PD entry %#016x.\n", (uint64_t)pte); 3197912Shestness@cs.utexas.edu doWrite = !pte.a; 3207912Shestness@cs.utexas.edu pte.a = 1; 3217912Shestness@cs.utexas.edu entry.writable = entry.writable && pte.w; 3227912Shestness@cs.utexas.edu entry.user = entry.user && pte.u; 3237912Shestness@cs.utexas.edu if (badNX || !pte.p) { 3247912Shestness@cs.utexas.edu doEndWalk = true; 3257912Shestness@cs.utexas.edu fault = pageFault(pte.p); 3267912Shestness@cs.utexas.edu break; 3277912Shestness@cs.utexas.edu } 3287912Shestness@cs.utexas.edu if (!pte.ps) { 3297912Shestness@cs.utexas.edu // 4 KB page 3307912Shestness@cs.utexas.edu entry.size = 4 * (1 << 10); 3317912Shestness@cs.utexas.edu nextRead = 3327912Shestness@cs.utexas.edu ((uint64_t)pte & (mask(40) << 12)) + vaddr.longl1 * dataSize; 3337912Shestness@cs.utexas.edu nextState = LongPTE; 3347912Shestness@cs.utexas.edu break; 3357912Shestness@cs.utexas.edu } else { 3367912Shestness@cs.utexas.edu // 2 MB page 3377912Shestness@cs.utexas.edu entry.size = 2 * (1 << 20); 3387912Shestness@cs.utexas.edu entry.paddr = (uint64_t)pte & (mask(31) << 21); 3397912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 3407912Shestness@cs.utexas.edu entry.global = pte.g; 3417912Shestness@cs.utexas.edu entry.patBit = bits(pte, 12); 3427912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((2 * (1 << 20)) - 1); 3437912Shestness@cs.utexas.edu doTLBInsert = true; 3447912Shestness@cs.utexas.edu doEndWalk = true; 3457912Shestness@cs.utexas.edu break; 3467912Shestness@cs.utexas.edu } 3477912Shestness@cs.utexas.edu case LongPTE: 3487912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 3497912Shestness@cs.utexas.edu "Got long mode PTE entry %#016x.\n", (uint64_t)pte); 3507912Shestness@cs.utexas.edu doWrite = !pte.a; 3517912Shestness@cs.utexas.edu pte.a = 1; 3527912Shestness@cs.utexas.edu entry.writable = entry.writable && pte.w; 3537912Shestness@cs.utexas.edu entry.user = entry.user && pte.u; 3547912Shestness@cs.utexas.edu if (badNX || !pte.p) { 3557912Shestness@cs.utexas.edu doEndWalk = true; 3567912Shestness@cs.utexas.edu fault = pageFault(pte.p); 3577912Shestness@cs.utexas.edu break; 3587912Shestness@cs.utexas.edu } 3597912Shestness@cs.utexas.edu entry.paddr = (uint64_t)pte & (mask(40) << 12); 3607912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 3617912Shestness@cs.utexas.edu entry.global = pte.g; 3627912Shestness@cs.utexas.edu entry.patBit = bits(pte, 12); 3637912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((4 * (1 << 10)) - 1); 3647912Shestness@cs.utexas.edu doTLBInsert = true; 3657912Shestness@cs.utexas.edu doEndWalk = true; 3667912Shestness@cs.utexas.edu break; 3677912Shestness@cs.utexas.edu case PAEPDP: 3687912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 3697912Shestness@cs.utexas.edu "Got legacy mode PAE PDP entry %#08x.\n", (uint32_t)pte); 3707912Shestness@cs.utexas.edu nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.pael2 * dataSize; 3717912Shestness@cs.utexas.edu if (!pte.p) { 3727912Shestness@cs.utexas.edu doEndWalk = true; 3737912Shestness@cs.utexas.edu fault = pageFault(pte.p); 3747912Shestness@cs.utexas.edu break; 3757912Shestness@cs.utexas.edu } 3767912Shestness@cs.utexas.edu nextState = PAEPD; 3777912Shestness@cs.utexas.edu break; 3787912Shestness@cs.utexas.edu case PAEPD: 3797912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 3807912Shestness@cs.utexas.edu "Got legacy mode PAE PD entry %#08x.\n", (uint32_t)pte); 3817912Shestness@cs.utexas.edu doWrite = !pte.a; 3827912Shestness@cs.utexas.edu pte.a = 1; 3837912Shestness@cs.utexas.edu entry.writable = pte.w; 3847912Shestness@cs.utexas.edu entry.user = pte.u; 3857912Shestness@cs.utexas.edu if (badNX || !pte.p) { 3867912Shestness@cs.utexas.edu doEndWalk = true; 3877912Shestness@cs.utexas.edu fault = pageFault(pte.p); 3887912Shestness@cs.utexas.edu break; 3897912Shestness@cs.utexas.edu } 3907912Shestness@cs.utexas.edu if (!pte.ps) { 3917912Shestness@cs.utexas.edu // 4 KB page 3927912Shestness@cs.utexas.edu entry.size = 4 * (1 << 10); 3937912Shestness@cs.utexas.edu nextRead = ((uint64_t)pte & (mask(40) << 12)) + vaddr.pael1 * dataSize; 3947912Shestness@cs.utexas.edu nextState = PAEPTE; 3957912Shestness@cs.utexas.edu break; 3967912Shestness@cs.utexas.edu } else { 3977912Shestness@cs.utexas.edu // 2 MB page 3987912Shestness@cs.utexas.edu entry.size = 2 * (1 << 20); 3997912Shestness@cs.utexas.edu entry.paddr = (uint64_t)pte & (mask(31) << 21); 4007912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 4017912Shestness@cs.utexas.edu entry.global = pte.g; 4027912Shestness@cs.utexas.edu entry.patBit = bits(pte, 12); 4037912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((2 * (1 << 20)) - 1); 4047912Shestness@cs.utexas.edu doTLBInsert = true; 4057912Shestness@cs.utexas.edu doEndWalk = true; 4067912Shestness@cs.utexas.edu break; 4077912Shestness@cs.utexas.edu } 4087912Shestness@cs.utexas.edu case PAEPTE: 4097912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 4107912Shestness@cs.utexas.edu "Got legacy mode PAE PTE entry %#08x.\n", (uint32_t)pte); 4117912Shestness@cs.utexas.edu doWrite = !pte.a; 4127912Shestness@cs.utexas.edu pte.a = 1; 4137912Shestness@cs.utexas.edu entry.writable = entry.writable && pte.w; 4147912Shestness@cs.utexas.edu entry.user = entry.user && pte.u; 4157912Shestness@cs.utexas.edu if (badNX || !pte.p) { 4167912Shestness@cs.utexas.edu doEndWalk = true; 4177912Shestness@cs.utexas.edu fault = pageFault(pte.p); 4187912Shestness@cs.utexas.edu break; 4197912Shestness@cs.utexas.edu } 4207912Shestness@cs.utexas.edu entry.paddr = (uint64_t)pte & (mask(40) << 12); 4217912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 4227912Shestness@cs.utexas.edu entry.global = pte.g; 4237912Shestness@cs.utexas.edu entry.patBit = bits(pte, 7); 4247912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((4 * (1 << 10)) - 1); 4257912Shestness@cs.utexas.edu doTLBInsert = true; 4267912Shestness@cs.utexas.edu doEndWalk = true; 4277912Shestness@cs.utexas.edu break; 4287912Shestness@cs.utexas.edu case PSEPD: 4297912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 4307912Shestness@cs.utexas.edu "Got legacy mode PSE PD entry %#08x.\n", (uint32_t)pte); 4317912Shestness@cs.utexas.edu doWrite = !pte.a; 4327912Shestness@cs.utexas.edu pte.a = 1; 4337912Shestness@cs.utexas.edu entry.writable = pte.w; 4347912Shestness@cs.utexas.edu entry.user = pte.u; 4357912Shestness@cs.utexas.edu if (!pte.p) { 4367912Shestness@cs.utexas.edu doEndWalk = true; 4377912Shestness@cs.utexas.edu fault = pageFault(pte.p); 4387912Shestness@cs.utexas.edu break; 4397912Shestness@cs.utexas.edu } 4407912Shestness@cs.utexas.edu if (!pte.ps) { 4417912Shestness@cs.utexas.edu // 4 KB page 4427912Shestness@cs.utexas.edu entry.size = 4 * (1 << 10); 4437912Shestness@cs.utexas.edu nextRead = 4447912Shestness@cs.utexas.edu ((uint64_t)pte & (mask(20) << 12)) + vaddr.norml2 * dataSize; 4457912Shestness@cs.utexas.edu nextState = PTE; 4467912Shestness@cs.utexas.edu break; 4477912Shestness@cs.utexas.edu } else { 4487912Shestness@cs.utexas.edu // 4 MB page 4497912Shestness@cs.utexas.edu entry.size = 4 * (1 << 20); 4507912Shestness@cs.utexas.edu entry.paddr = bits(pte, 20, 13) << 32 | bits(pte, 31, 22) << 22; 4517912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 4527912Shestness@cs.utexas.edu entry.global = pte.g; 4537912Shestness@cs.utexas.edu entry.patBit = bits(pte, 12); 4547912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((4 * (1 << 20)) - 1); 4557912Shestness@cs.utexas.edu doTLBInsert = true; 4567912Shestness@cs.utexas.edu doEndWalk = true; 4577912Shestness@cs.utexas.edu break; 4587912Shestness@cs.utexas.edu } 4597912Shestness@cs.utexas.edu case PD: 4607912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 4617912Shestness@cs.utexas.edu "Got legacy mode PD entry %#08x.\n", (uint32_t)pte); 4627912Shestness@cs.utexas.edu doWrite = !pte.a; 4637912Shestness@cs.utexas.edu pte.a = 1; 4647912Shestness@cs.utexas.edu entry.writable = pte.w; 4657912Shestness@cs.utexas.edu entry.user = pte.u; 4667912Shestness@cs.utexas.edu if (!pte.p) { 4677912Shestness@cs.utexas.edu doEndWalk = true; 4687912Shestness@cs.utexas.edu fault = pageFault(pte.p); 4697912Shestness@cs.utexas.edu break; 4707912Shestness@cs.utexas.edu } 4717912Shestness@cs.utexas.edu // 4 KB page 4727912Shestness@cs.utexas.edu entry.size = 4 * (1 << 10); 4737912Shestness@cs.utexas.edu nextRead = ((uint64_t)pte & (mask(20) << 12)) + vaddr.norml2 * dataSize; 4747912Shestness@cs.utexas.edu nextState = PTE; 4757912Shestness@cs.utexas.edu break; 4767912Shestness@cs.utexas.edu case PTE: 4777912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, 4787912Shestness@cs.utexas.edu "Got legacy mode PTE entry %#08x.\n", (uint32_t)pte); 4797912Shestness@cs.utexas.edu doWrite = !pte.a; 4807912Shestness@cs.utexas.edu pte.a = 1; 4817912Shestness@cs.utexas.edu entry.writable = pte.w; 4827912Shestness@cs.utexas.edu entry.user = pte.u; 4837912Shestness@cs.utexas.edu if (!pte.p) { 4847912Shestness@cs.utexas.edu doEndWalk = true; 4857912Shestness@cs.utexas.edu fault = pageFault(pte.p); 4867912Shestness@cs.utexas.edu break; 4877912Shestness@cs.utexas.edu } 4887912Shestness@cs.utexas.edu entry.paddr = (uint64_t)pte & (mask(20) << 12); 4897912Shestness@cs.utexas.edu entry.uncacheable = uncacheable; 4907912Shestness@cs.utexas.edu entry.global = pte.g; 4917912Shestness@cs.utexas.edu entry.patBit = bits(pte, 7); 4927912Shestness@cs.utexas.edu entry.vaddr = entry.vaddr & ~((4 * (1 << 10)) - 1); 4937912Shestness@cs.utexas.edu doTLBInsert = true; 4947912Shestness@cs.utexas.edu doEndWalk = true; 4957912Shestness@cs.utexas.edu break; 4967912Shestness@cs.utexas.edu default: 4977912Shestness@cs.utexas.edu panic("Unknown page table walker state %d!\n"); 4987912Shestness@cs.utexas.edu } 4997912Shestness@cs.utexas.edu if (doEndWalk) { 5007912Shestness@cs.utexas.edu if (doTLBInsert) 5017912Shestness@cs.utexas.edu if (!functional) 5027912Shestness@cs.utexas.edu walker->tlb->insert(entry.vaddr, entry); 5037912Shestness@cs.utexas.edu endWalk(); 5047912Shestness@cs.utexas.edu } else { 5057912Shestness@cs.utexas.edu PacketPtr oldRead = read; 5067912Shestness@cs.utexas.edu //If we didn't return, we're setting up another read. 5077912Shestness@cs.utexas.edu Request::Flags flags = oldRead->req->getFlags(); 5087912Shestness@cs.utexas.edu flags.set(Request::UNCACHEABLE, uncacheable); 5097912Shestness@cs.utexas.edu RequestPtr request = 5107912Shestness@cs.utexas.edu new Request(nextRead, oldRead->getSize(), flags); 5118096Sgblack@eecs.umich.edu read = new Packet(request, MemCmd::ReadReq, Packet::Broadcast); 5127912Shestness@cs.utexas.edu read->allocate(); 5137912Shestness@cs.utexas.edu // If we need to write, adjust the read packet to write the modified 5147912Shestness@cs.utexas.edu // value back to memory. 5157912Shestness@cs.utexas.edu if (doWrite) { 5167912Shestness@cs.utexas.edu write = oldRead; 5177912Shestness@cs.utexas.edu write->set<uint64_t>(pte); 5187912Shestness@cs.utexas.edu write->cmd = MemCmd::WriteReq; 5197912Shestness@cs.utexas.edu write->setDest(Packet::Broadcast); 5207912Shestness@cs.utexas.edu } else { 5217912Shestness@cs.utexas.edu write = NULL; 5227912Shestness@cs.utexas.edu delete oldRead->req; 5237912Shestness@cs.utexas.edu delete oldRead; 5247912Shestness@cs.utexas.edu } 5257912Shestness@cs.utexas.edu } 5267912Shestness@cs.utexas.edu return fault; 5277912Shestness@cs.utexas.edu} 5287912Shestness@cs.utexas.edu 5297912Shestness@cs.utexas.eduvoid 5307912Shestness@cs.utexas.eduWalker::WalkerState::endWalk() 5317912Shestness@cs.utexas.edu{ 5327912Shestness@cs.utexas.edu nextState = Ready; 5337912Shestness@cs.utexas.edu delete read->req; 5347912Shestness@cs.utexas.edu delete read; 5357912Shestness@cs.utexas.edu read = NULL; 5367912Shestness@cs.utexas.edu} 5377912Shestness@cs.utexas.edu 5387912Shestness@cs.utexas.eduvoid 5397912Shestness@cs.utexas.eduWalker::WalkerState::setupWalk(Addr vaddr) 5407912Shestness@cs.utexas.edu{ 5417912Shestness@cs.utexas.edu VAddr addr = vaddr; 5427912Shestness@cs.utexas.edu CR3 cr3 = tc->readMiscRegNoEffect(MISCREG_CR3); 5437912Shestness@cs.utexas.edu // Check if we're in long mode or not 5447912Shestness@cs.utexas.edu Efer efer = tc->readMiscRegNoEffect(MISCREG_EFER); 5457912Shestness@cs.utexas.edu dataSize = 8; 5467912Shestness@cs.utexas.edu Addr topAddr; 5477912Shestness@cs.utexas.edu if (efer.lma) { 5487912Shestness@cs.utexas.edu // Do long mode. 5497912Shestness@cs.utexas.edu state = LongPML4; 5507912Shestness@cs.utexas.edu topAddr = (cr3.longPdtb << 12) + addr.longl4 * dataSize; 5517912Shestness@cs.utexas.edu enableNX = efer.nxe; 5527912Shestness@cs.utexas.edu } else { 5537912Shestness@cs.utexas.edu // We're in some flavor of legacy mode. 5547912Shestness@cs.utexas.edu CR4 cr4 = tc->readMiscRegNoEffect(MISCREG_CR4); 5557912Shestness@cs.utexas.edu if (cr4.pae) { 5567912Shestness@cs.utexas.edu // Do legacy PAE. 5577912Shestness@cs.utexas.edu state = PAEPDP; 5587912Shestness@cs.utexas.edu topAddr = (cr3.paePdtb << 5) + addr.pael3 * dataSize; 5597912Shestness@cs.utexas.edu enableNX = efer.nxe; 5607912Shestness@cs.utexas.edu } else { 5617912Shestness@cs.utexas.edu dataSize = 4; 5627912Shestness@cs.utexas.edu topAddr = (cr3.pdtb << 12) + addr.norml2 * dataSize; 5637912Shestness@cs.utexas.edu if (cr4.pse) { 5647912Shestness@cs.utexas.edu // Do legacy PSE. 5657912Shestness@cs.utexas.edu state = PSEPD; 5667912Shestness@cs.utexas.edu } else { 5677912Shestness@cs.utexas.edu // Do legacy non PSE. 5687912Shestness@cs.utexas.edu state = PD; 5697912Shestness@cs.utexas.edu } 5707912Shestness@cs.utexas.edu enableNX = false; 5717912Shestness@cs.utexas.edu } 5727912Shestness@cs.utexas.edu } 5737912Shestness@cs.utexas.edu 5747912Shestness@cs.utexas.edu nextState = Ready; 5757912Shestness@cs.utexas.edu entry.vaddr = vaddr; 5767912Shestness@cs.utexas.edu 5777912Shestness@cs.utexas.edu Request::Flags flags = Request::PHYSICAL; 5787912Shestness@cs.utexas.edu if (cr3.pcd) 5797912Shestness@cs.utexas.edu flags.set(Request::UNCACHEABLE); 5807912Shestness@cs.utexas.edu RequestPtr request = new Request(topAddr, dataSize, flags); 5818096Sgblack@eecs.umich.edu read = new Packet(request, MemCmd::ReadReq, Packet::Broadcast); 5827912Shestness@cs.utexas.edu read->allocate(); 5837912Shestness@cs.utexas.edu} 5847912Shestness@cs.utexas.edu 5857912Shestness@cs.utexas.edubool 5867912Shestness@cs.utexas.eduWalker::WalkerState::recvPacket(PacketPtr pkt) 5877912Shestness@cs.utexas.edu{ 5887912Shestness@cs.utexas.edu if (pkt->isResponse() && !pkt->wasNacked()) { 5897912Shestness@cs.utexas.edu assert(inflight); 5907912Shestness@cs.utexas.edu assert(state == Waiting); 5917912Shestness@cs.utexas.edu assert(!read); 5927912Shestness@cs.utexas.edu inflight--; 5937912Shestness@cs.utexas.edu if (pkt->isRead()) { 5947912Shestness@cs.utexas.edu state = nextState; 5957912Shestness@cs.utexas.edu nextState = Ready; 5967912Shestness@cs.utexas.edu PacketPtr write = NULL; 5977912Shestness@cs.utexas.edu read = pkt; 5987912Shestness@cs.utexas.edu timingFault = stepWalk(write); 5997912Shestness@cs.utexas.edu state = Waiting; 6007912Shestness@cs.utexas.edu assert(timingFault == NoFault || read == NULL); 6017912Shestness@cs.utexas.edu if (write) { 6027912Shestness@cs.utexas.edu writes.push_back(write); 6037912Shestness@cs.utexas.edu } 6047912Shestness@cs.utexas.edu sendPackets(); 6057912Shestness@cs.utexas.edu } else { 6067912Shestness@cs.utexas.edu sendPackets(); 6077912Shestness@cs.utexas.edu } 6087912Shestness@cs.utexas.edu if (inflight == 0 && read == NULL && writes.size() == 0) { 6097912Shestness@cs.utexas.edu state = Ready; 6107912Shestness@cs.utexas.edu nextState = Waiting; 6117912Shestness@cs.utexas.edu if (timingFault == NoFault) { 6127912Shestness@cs.utexas.edu /* 6137912Shestness@cs.utexas.edu * Finish the translation. Now that we now the right entry is 6147912Shestness@cs.utexas.edu * in the TLB, this should work with no memory accesses. 6157912Shestness@cs.utexas.edu * There could be new faults unrelated to the table walk like 6167912Shestness@cs.utexas.edu * permissions violations, so we'll need the return value as 6177912Shestness@cs.utexas.edu * well. 6187912Shestness@cs.utexas.edu */ 6197912Shestness@cs.utexas.edu bool delayedResponse; 6207912Shestness@cs.utexas.edu Fault fault = walker->tlb->translate(req, tc, NULL, mode, 6217912Shestness@cs.utexas.edu delayedResponse, true); 6227912Shestness@cs.utexas.edu assert(!delayedResponse); 6237912Shestness@cs.utexas.edu // Let the CPU continue. 6247912Shestness@cs.utexas.edu translation->finish(fault, req, tc, mode); 6257912Shestness@cs.utexas.edu } else { 6267912Shestness@cs.utexas.edu // There was a fault during the walk. Let the CPU know. 6277912Shestness@cs.utexas.edu translation->finish(timingFault, req, tc, mode); 6287912Shestness@cs.utexas.edu } 6297912Shestness@cs.utexas.edu return true; 6307912Shestness@cs.utexas.edu } 6317912Shestness@cs.utexas.edu } else if (pkt->wasNacked()) { 6327912Shestness@cs.utexas.edu DPRINTF(PageTableWalker, "Request was nacked. Entering retry state\n"); 6337912Shestness@cs.utexas.edu pkt->reinitNacked(); 6347912Shestness@cs.utexas.edu if (!walker->sendTiming(this, pkt)) { 6357912Shestness@cs.utexas.edu inflight--; 6367912Shestness@cs.utexas.edu retrying = true; 6377912Shestness@cs.utexas.edu if (pkt->isWrite()) { 6387912Shestness@cs.utexas.edu writes.push_back(pkt); 6397912Shestness@cs.utexas.edu } else { 6407912Shestness@cs.utexas.edu assert(!read); 6417912Shestness@cs.utexas.edu read = pkt; 6427912Shestness@cs.utexas.edu } 6437912Shestness@cs.utexas.edu } 6447912Shestness@cs.utexas.edu } 6457912Shestness@cs.utexas.edu return false; 6467912Shestness@cs.utexas.edu} 6477912Shestness@cs.utexas.edu 6487912Shestness@cs.utexas.eduvoid 6497912Shestness@cs.utexas.eduWalker::WalkerState::sendPackets() 6505245Sgblack@eecs.umich.edu{ 6515245Sgblack@eecs.umich.edu //If we're already waiting for the port to become available, just return. 6525245Sgblack@eecs.umich.edu if (retrying) 6535245Sgblack@eecs.umich.edu return; 6545245Sgblack@eecs.umich.edu 6555245Sgblack@eecs.umich.edu //Reads always have priority 6565245Sgblack@eecs.umich.edu if (read) { 6575897Sgblack@eecs.umich.edu PacketPtr pkt = read; 6585897Sgblack@eecs.umich.edu read = NULL; 6595897Sgblack@eecs.umich.edu inflight++; 6607912Shestness@cs.utexas.edu if (!walker->sendTiming(this, pkt)) { 6615245Sgblack@eecs.umich.edu retrying = true; 6625897Sgblack@eecs.umich.edu read = pkt; 6635897Sgblack@eecs.umich.edu inflight--; 6645245Sgblack@eecs.umich.edu return; 6655245Sgblack@eecs.umich.edu } 6665245Sgblack@eecs.umich.edu } 6675245Sgblack@eecs.umich.edu //Send off as many of the writes as we can. 6685245Sgblack@eecs.umich.edu while (writes.size()) { 6695245Sgblack@eecs.umich.edu PacketPtr write = writes.back(); 6705897Sgblack@eecs.umich.edu writes.pop_back(); 6715897Sgblack@eecs.umich.edu inflight++; 6727912Shestness@cs.utexas.edu if (!walker->sendTiming(this, write)) { 6735245Sgblack@eecs.umich.edu retrying = true; 6745897Sgblack@eecs.umich.edu writes.push_back(write); 6755897Sgblack@eecs.umich.edu inflight--; 6765245Sgblack@eecs.umich.edu return; 6775245Sgblack@eecs.umich.edu } 6785245Sgblack@eecs.umich.edu } 6795245Sgblack@eecs.umich.edu} 6805245Sgblack@eecs.umich.edu 6817912Shestness@cs.utexas.edubool 6827912Shestness@cs.utexas.eduWalker::WalkerState::isRetrying() 6835245Sgblack@eecs.umich.edu{ 6847912Shestness@cs.utexas.edu return retrying; 6857912Shestness@cs.utexas.edu} 6867912Shestness@cs.utexas.edu 6877912Shestness@cs.utexas.edubool 6887912Shestness@cs.utexas.eduWalker::WalkerState::isTiming() 6897912Shestness@cs.utexas.edu{ 6907912Shestness@cs.utexas.edu return timing; 6917912Shestness@cs.utexas.edu} 6927912Shestness@cs.utexas.edu 6937912Shestness@cs.utexas.edubool 6947912Shestness@cs.utexas.eduWalker::WalkerState::wasStarted() 6957912Shestness@cs.utexas.edu{ 6967912Shestness@cs.utexas.edu return started; 6977912Shestness@cs.utexas.edu} 6987912Shestness@cs.utexas.edu 6997912Shestness@cs.utexas.eduvoid 7007912Shestness@cs.utexas.eduWalker::WalkerState::retry() 7017912Shestness@cs.utexas.edu{ 7027912Shestness@cs.utexas.edu retrying = false; 7037912Shestness@cs.utexas.edu sendPackets(); 7045245Sgblack@eecs.umich.edu} 7055245Sgblack@eecs.umich.edu 7065895Sgblack@eecs.umich.eduFault 7077912Shestness@cs.utexas.eduWalker::WalkerState::pageFault(bool present) 7085895Sgblack@eecs.umich.edu{ 7095904Sgblack@eecs.umich.edu DPRINTF(PageTableWalker, "Raising page fault.\n"); 7105895Sgblack@eecs.umich.edu HandyM5Reg m5reg = tc->readMiscRegNoEffect(MISCREG_M5_REG); 7116023Snate@binkert.org if (mode == BaseTLB::Execute && !enableNX) 7126023Snate@binkert.org mode = BaseTLB::Read; 7136023Snate@binkert.org return new PageFault(entry.vaddr, present, mode, m5reg.cpl == 3, false); 7145895Sgblack@eecs.umich.edu} 7155895Sgblack@eecs.umich.edu 7167912Shestness@cs.utexas.edu/* end namespace X86ISA */ } 7175245Sgblack@eecs.umich.edu 7185245Sgblack@eecs.umich.eduX86ISA::Walker * 7195245Sgblack@eecs.umich.eduX86PagetableWalkerParams::create() 7205245Sgblack@eecs.umich.edu{ 7215245Sgblack@eecs.umich.edu return new X86ISA::Walker(this); 7225245Sgblack@eecs.umich.edu} 723