tlb.cc revision 10873
16019Shines@cs.fsu.edu/* 210037SARM gem5 Developers * Copyright (c) 2010-2013 ARM Limited 37093Sgblack@eecs.umich.edu * All rights reserved 47093Sgblack@eecs.umich.edu * 57093Sgblack@eecs.umich.edu * The license below extends only to copyright in the software and shall 67093Sgblack@eecs.umich.edu * not be construed as granting a license to any other intellectual 77093Sgblack@eecs.umich.edu * property including but not limited to intellectual property relating 87093Sgblack@eecs.umich.edu * to a hardware implementation of the functionality of the software 97093Sgblack@eecs.umich.edu * licensed hereunder. You may use the software subject to the license 107093Sgblack@eecs.umich.edu * terms below provided that you ensure that this notice is replicated 117093Sgblack@eecs.umich.edu * unmodified and in its entirety in all distributions of the software, 127093Sgblack@eecs.umich.edu * modified or unmodified, in source code or in binary form. 137093Sgblack@eecs.umich.edu * 146019Shines@cs.fsu.edu * Copyright (c) 2001-2005 The Regents of The University of Michigan 156019Shines@cs.fsu.edu * All rights reserved. 166019Shines@cs.fsu.edu * 176019Shines@cs.fsu.edu * Redistribution and use in source and binary forms, with or without 186019Shines@cs.fsu.edu * modification, are permitted provided that the following conditions are 196019Shines@cs.fsu.edu * met: redistributions of source code must retain the above copyright 206019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer; 216019Shines@cs.fsu.edu * redistributions in binary form must reproduce the above copyright 226019Shines@cs.fsu.edu * notice, this list of conditions and the following disclaimer in the 236019Shines@cs.fsu.edu * documentation and/or other materials provided with the distribution; 246019Shines@cs.fsu.edu * neither the name of the copyright holders nor the names of its 256019Shines@cs.fsu.edu * contributors may be used to endorse or promote products derived from 266019Shines@cs.fsu.edu * this software without specific prior written permission. 276019Shines@cs.fsu.edu * 286019Shines@cs.fsu.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 296019Shines@cs.fsu.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 306019Shines@cs.fsu.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 316019Shines@cs.fsu.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 326019Shines@cs.fsu.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 336019Shines@cs.fsu.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 346019Shines@cs.fsu.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 356019Shines@cs.fsu.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 366019Shines@cs.fsu.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 376019Shines@cs.fsu.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 386019Shines@cs.fsu.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 396019Shines@cs.fsu.edu * 407399SAli.Saidi@ARM.com * Authors: Ali Saidi 417399SAli.Saidi@ARM.com * Nathan Binkert 426019Shines@cs.fsu.edu * Steve Reinhardt 436019Shines@cs.fsu.edu */ 446019Shines@cs.fsu.edu 4510873Sandreas.sandberg@arm.com#include "arch/arm/tlb.hh" 4610873Sandreas.sandberg@arm.com 4710474Sandreas.hansson@arm.com#include <memory> 486019Shines@cs.fsu.edu#include <string> 496019Shines@cs.fsu.edu#include <vector> 506019Shines@cs.fsu.edu 516116Snate@binkert.org#include "arch/arm/faults.hh" 526019Shines@cs.fsu.edu#include "arch/arm/pagetable.hh" 538782Sgblack@eecs.umich.edu#include "arch/arm/system.hh" 548756Sgblack@eecs.umich.edu#include "arch/arm/table_walker.hh" 5510037SARM gem5 Developers#include "arch/arm/stage2_lookup.hh" 5610037SARM gem5 Developers#include "arch/arm/stage2_mmu.hh" 576019Shines@cs.fsu.edu#include "arch/arm/utility.hh" 586019Shines@cs.fsu.edu#include "base/inifile.hh" 596019Shines@cs.fsu.edu#include "base/str.hh" 606019Shines@cs.fsu.edu#include "base/trace.hh" 6110024Sdam.sunwoo@arm.com#include "cpu/base.hh" 626019Shines@cs.fsu.edu#include "cpu/thread_context.hh" 638232Snate@binkert.org#include "debug/Checkpoint.hh" 648232Snate@binkert.org#include "debug/TLB.hh" 658232Snate@binkert.org#include "debug/TLBVerbose.hh" 666116Snate@binkert.org#include "mem/page_table.hh" 676116Snate@binkert.org#include "params/ArmTLB.hh" 688756Sgblack@eecs.umich.edu#include "sim/full_system.hh" 696019Shines@cs.fsu.edu#include "sim/process.hh" 706019Shines@cs.fsu.edu 716019Shines@cs.fsu.eduusing namespace std; 726019Shines@cs.fsu.eduusing namespace ArmISA; 736019Shines@cs.fsu.edu 7410037SARM gem5 DevelopersTLB::TLB(const ArmTLBParams *p) 7510037SARM gem5 Developers : BaseTLB(p), table(new TlbEntry[p->size]), size(p->size), 7610418Sandreas.hansson@arm.com isStage2(p->is_stage2), stage2Req(false), _attr(0), 7710418Sandreas.hansson@arm.com directToStage2(false), tableWalker(p->walker), stage2Tlb(NULL), 7810822Sandreas.hansson@arm.com stage2Mmu(NULL), rangeMRU(1), 7910537Sandreas.hansson@arm.com aarch64(false), aarch64EL(EL0), isPriv(false), isSecure(false), 8010537Sandreas.hansson@arm.com isHyp(false), asid(0), vmid(0), dacr(0), 8110418Sandreas.hansson@arm.com miscRegValid(false), curTranType(NormalTran) 826019Shines@cs.fsu.edu{ 8310037SARM gem5 Developers tableWalker->setTlb(this); 847399SAli.Saidi@ARM.com 8510037SARM gem5 Developers // Cache system-level properties 8610037SARM gem5 Developers haveLPAE = tableWalker->haveLPAE(); 8710037SARM gem5 Developers haveVirtualization = tableWalker->haveVirtualization(); 8810037SARM gem5 Developers haveLargeAsid64 = tableWalker->haveLargeAsid64(); 896019Shines@cs.fsu.edu} 906019Shines@cs.fsu.edu 916019Shines@cs.fsu.eduTLB::~TLB() 926019Shines@cs.fsu.edu{ 9310037SARM gem5 Developers delete[] table; 9410037SARM gem5 Developers} 9510037SARM gem5 Developers 9610037SARM gem5 Developersvoid 9710037SARM gem5 DevelopersTLB::init() 9810037SARM gem5 Developers{ 9910037SARM gem5 Developers if (stage2Mmu && !isStage2) 10010037SARM gem5 Developers stage2Tlb = stage2Mmu->stage2Tlb(); 10110037SARM gem5 Developers} 10210037SARM gem5 Developers 10310037SARM gem5 Developersvoid 10410717Sandreas.hansson@arm.comTLB::setMMU(Stage2MMU *m, MasterID master_id) 10510037SARM gem5 Developers{ 10610037SARM gem5 Developers stage2Mmu = m; 10710717Sandreas.hansson@arm.com tableWalker->setMMU(m, master_id); 1086019Shines@cs.fsu.edu} 1096019Shines@cs.fsu.edu 1107694SAli.Saidi@ARM.combool 1117694SAli.Saidi@ARM.comTLB::translateFunctional(ThreadContext *tc, Addr va, Addr &pa) 1127694SAli.Saidi@ARM.com{ 11310037SARM gem5 Developers updateMiscReg(tc); 11410037SARM gem5 Developers 11510037SARM gem5 Developers if (directToStage2) { 11610037SARM gem5 Developers assert(stage2Tlb); 11710037SARM gem5 Developers return stage2Tlb->translateFunctional(tc, va, pa); 11810037SARM gem5 Developers } 11910037SARM gem5 Developers 12010037SARM gem5 Developers TlbEntry *e = lookup(va, asid, vmid, isHyp, isSecure, true, false, 12110037SARM gem5 Developers aarch64 ? aarch64EL : EL1); 1227694SAli.Saidi@ARM.com if (!e) 1237694SAli.Saidi@ARM.com return false; 1247694SAli.Saidi@ARM.com pa = e->pAddr(va); 1257694SAli.Saidi@ARM.com return true; 1267694SAli.Saidi@ARM.com} 1277694SAli.Saidi@ARM.com 1289738Sandreas@sandberg.pp.seFault 1299738Sandreas@sandberg.pp.seTLB::finalizePhysical(RequestPtr req, ThreadContext *tc, Mode mode) const 1309738Sandreas@sandberg.pp.se{ 1319738Sandreas@sandberg.pp.se return NoFault; 1329738Sandreas@sandberg.pp.se} 1339738Sandreas@sandberg.pp.se 1347404SAli.Saidi@ARM.comTlbEntry* 13510037SARM gem5 DevelopersTLB::lookup(Addr va, uint16_t asn, uint8_t vmid, bool hyp, bool secure, 13610037SARM gem5 Developers bool functional, bool ignore_asn, uint8_t target_el) 1376019Shines@cs.fsu.edu{ 1387404SAli.Saidi@ARM.com 1397404SAli.Saidi@ARM.com TlbEntry *retval = NULL; 1407404SAli.Saidi@ARM.com 14110037SARM gem5 Developers // Maintaining LRU array 1427404SAli.Saidi@ARM.com int x = 0; 1437404SAli.Saidi@ARM.com while (retval == NULL && x < size) { 14410037SARM gem5 Developers if ((!ignore_asn && table[x].match(va, asn, vmid, hyp, secure, false, 14510037SARM gem5 Developers target_el)) || 14610037SARM gem5 Developers (ignore_asn && table[x].match(va, vmid, hyp, secure, target_el))) { 14710037SARM gem5 Developers // We only move the hit entry ahead when the position is higher 14810037SARM gem5 Developers // than rangeMRU 1499535Smrinmoy.ghosh@arm.com if (x > rangeMRU && !functional) { 1507697SAli.Saidi@ARM.com TlbEntry tmp_entry = table[x]; 1517697SAli.Saidi@ARM.com for(int i = x; i > 0; i--) 15210037SARM gem5 Developers table[i] = table[i - 1]; 1537697SAli.Saidi@ARM.com table[0] = tmp_entry; 1547697SAli.Saidi@ARM.com retval = &table[0]; 1557697SAli.Saidi@ARM.com } else { 1567697SAli.Saidi@ARM.com retval = &table[x]; 1577697SAli.Saidi@ARM.com } 1587404SAli.Saidi@ARM.com break; 1597404SAli.Saidi@ARM.com } 16010037SARM gem5 Developers ++x; 1617404SAli.Saidi@ARM.com } 1627404SAli.Saidi@ARM.com 16310037SARM gem5 Developers DPRINTF(TLBVerbose, "Lookup %#x, asn %#x -> %s vmn 0x%x hyp %d secure %d " 16410037SARM gem5 Developers "ppn %#x size: %#x pa: %#x ap:%d ns:%d nstid:%d g:%d asid: %d " 16510037SARM gem5 Developers "el: %d\n", 16610037SARM gem5 Developers va, asn, retval ? "hit" : "miss", vmid, hyp, secure, 16710037SARM gem5 Developers retval ? retval->pfn : 0, retval ? retval->size : 0, 16810037SARM gem5 Developers retval ? retval->pAddr(va) : 0, retval ? retval->ap : 0, 16910037SARM gem5 Developers retval ? retval->ns : 0, retval ? retval->nstid : 0, 17010037SARM gem5 Developers retval ? retval->global : 0, retval ? retval->asid : 0, 17110367SAndrew.Bardsley@arm.com retval ? retval->el : 0); 17210037SARM gem5 Developers 1737404SAli.Saidi@ARM.com return retval; 1746019Shines@cs.fsu.edu} 1756019Shines@cs.fsu.edu 1766019Shines@cs.fsu.edu// insert a new TLB entry 1776019Shines@cs.fsu.eduvoid 1787404SAli.Saidi@ARM.comTLB::insert(Addr addr, TlbEntry &entry) 1796019Shines@cs.fsu.edu{ 1807404SAli.Saidi@ARM.com DPRINTF(TLB, "Inserting entry into TLB with pfn:%#x size:%#x vpn: %#x" 18110037SARM gem5 Developers " asid:%d vmid:%d N:%d global:%d valid:%d nc:%d xn:%d" 18210037SARM gem5 Developers " ap:%#x domain:%#x ns:%d nstid:%d isHyp:%d\n", entry.pfn, 18310037SARM gem5 Developers entry.size, entry.vpn, entry.asid, entry.vmid, entry.N, 18410037SARM gem5 Developers entry.global, entry.valid, entry.nonCacheable, entry.xn, 18510037SARM gem5 Developers entry.ap, static_cast<uint8_t>(entry.domain), entry.ns, entry.nstid, 18610037SARM gem5 Developers entry.isHyp); 1877404SAli.Saidi@ARM.com 18810037SARM gem5 Developers if (table[size - 1].valid) 18910037SARM gem5 Developers DPRINTF(TLB, " - Replacing Valid entry %#x, asn %d vmn %d ppn %#x " 19010037SARM gem5 Developers "size: %#x ap:%d ns:%d nstid:%d g:%d isHyp:%d el: %d\n", 1917697SAli.Saidi@ARM.com table[size-1].vpn << table[size-1].N, table[size-1].asid, 19210037SARM gem5 Developers table[size-1].vmid, table[size-1].pfn << table[size-1].N, 19310037SARM gem5 Developers table[size-1].size, table[size-1].ap, table[size-1].ns, 19410037SARM gem5 Developers table[size-1].nstid, table[size-1].global, table[size-1].isHyp, 19510037SARM gem5 Developers table[size-1].el); 1967404SAli.Saidi@ARM.com 1977697SAli.Saidi@ARM.com //inserting to MRU position and evicting the LRU one 1987404SAli.Saidi@ARM.com 19910037SARM gem5 Developers for (int i = size - 1; i > 0; --i) 20010037SARM gem5 Developers table[i] = table[i-1]; 2017697SAli.Saidi@ARM.com table[0] = entry; 2027734SAli.Saidi@ARM.com 2037734SAli.Saidi@ARM.com inserts++; 20410463SAndreas.Sandberg@ARM.com ppRefills->notify(1); 2056019Shines@cs.fsu.edu} 2066019Shines@cs.fsu.edu 2076019Shines@cs.fsu.eduvoid 20810037SARM gem5 DevelopersTLB::printTlb() const 2097404SAli.Saidi@ARM.com{ 2107404SAli.Saidi@ARM.com int x = 0; 2117404SAli.Saidi@ARM.com TlbEntry *te; 2127404SAli.Saidi@ARM.com DPRINTF(TLB, "Current TLB contents:\n"); 2137404SAli.Saidi@ARM.com while (x < size) { 21410037SARM gem5 Developers te = &table[x]; 21510037SARM gem5 Developers if (te->valid) 21610037SARM gem5 Developers DPRINTF(TLB, " * %s\n", te->print()); 21710037SARM gem5 Developers ++x; 2187404SAli.Saidi@ARM.com } 2197404SAli.Saidi@ARM.com} 2207404SAli.Saidi@ARM.com 2217404SAli.Saidi@ARM.comvoid 22210037SARM gem5 DevelopersTLB::flushAllSecurity(bool secure_lookup, uint8_t target_el, bool ignore_el) 2236019Shines@cs.fsu.edu{ 22410037SARM gem5 Developers DPRINTF(TLB, "Flushing all TLB entries (%s lookup)\n", 22510037SARM gem5 Developers (secure_lookup ? "secure" : "non-secure")); 2267404SAli.Saidi@ARM.com int x = 0; 2277404SAli.Saidi@ARM.com TlbEntry *te; 2287404SAli.Saidi@ARM.com while (x < size) { 22910037SARM gem5 Developers te = &table[x]; 23010037SARM gem5 Developers if (te->valid && secure_lookup == !te->nstid && 23110037SARM gem5 Developers (te->vmid == vmid || secure_lookup) && 23210037SARM gem5 Developers checkELMatch(target_el, te->el, ignore_el)) { 23310037SARM gem5 Developers 23410037SARM gem5 Developers DPRINTF(TLB, " - %s\n", te->print()); 23510037SARM gem5 Developers te->valid = false; 23610037SARM gem5 Developers flushedEntries++; 23710037SARM gem5 Developers } 23810037SARM gem5 Developers ++x; 2397404SAli.Saidi@ARM.com } 2407404SAli.Saidi@ARM.com 24110037SARM gem5 Developers flushTlb++; 24210037SARM gem5 Developers 24310037SARM gem5 Developers // If there's a second stage TLB (and we're not it) then flush it as well 24410037SARM gem5 Developers // if we're currently in hyp mode 24510037SARM gem5 Developers if (!isStage2 && isHyp) { 24610037SARM gem5 Developers stage2Tlb->flushAllSecurity(secure_lookup, true); 24710037SARM gem5 Developers } 24810037SARM gem5 Developers} 24910037SARM gem5 Developers 25010037SARM gem5 Developersvoid 25110037SARM gem5 DevelopersTLB::flushAllNs(bool hyp, uint8_t target_el, bool ignore_el) 25210037SARM gem5 Developers{ 25310037SARM gem5 Developers DPRINTF(TLB, "Flushing all NS TLB entries (%s lookup)\n", 25410037SARM gem5 Developers (hyp ? "hyp" : "non-hyp")); 25510037SARM gem5 Developers int x = 0; 25610037SARM gem5 Developers TlbEntry *te; 25710037SARM gem5 Developers while (x < size) { 25810037SARM gem5 Developers te = &table[x]; 25910037SARM gem5 Developers if (te->valid && te->nstid && te->isHyp == hyp && 26010037SARM gem5 Developers checkELMatch(target_el, te->el, ignore_el)) { 26110037SARM gem5 Developers 26210037SARM gem5 Developers DPRINTF(TLB, " - %s\n", te->print()); 26310037SARM gem5 Developers flushedEntries++; 26410037SARM gem5 Developers te->valid = false; 26510037SARM gem5 Developers } 26610037SARM gem5 Developers ++x; 26710037SARM gem5 Developers } 2687734SAli.Saidi@ARM.com 2697734SAli.Saidi@ARM.com flushTlb++; 27010037SARM gem5 Developers 27110037SARM gem5 Developers // If there's a second stage TLB (and we're not it) then flush it as well 27210037SARM gem5 Developers if (!isStage2 && !hyp) { 27310037SARM gem5 Developers stage2Tlb->flushAllNs(false, true); 27410037SARM gem5 Developers } 2756019Shines@cs.fsu.edu} 2766019Shines@cs.fsu.edu 2777404SAli.Saidi@ARM.comvoid 27810037SARM gem5 DevelopersTLB::flushMvaAsid(Addr mva, uint64_t asn, bool secure_lookup, uint8_t target_el) 2797404SAli.Saidi@ARM.com{ 28010037SARM gem5 Developers DPRINTF(TLB, "Flushing TLB entries with mva: %#x, asid: %#x " 28110037SARM gem5 Developers "(%s lookup)\n", mva, asn, (secure_lookup ? 28210037SARM gem5 Developers "secure" : "non-secure")); 28310037SARM gem5 Developers _flushMva(mva, asn, secure_lookup, false, false, target_el); 2847734SAli.Saidi@ARM.com flushTlbMvaAsid++; 2857404SAli.Saidi@ARM.com} 2867404SAli.Saidi@ARM.com 2877404SAli.Saidi@ARM.comvoid 28810037SARM gem5 DevelopersTLB::flushAsid(uint64_t asn, bool secure_lookup, uint8_t target_el) 2897404SAli.Saidi@ARM.com{ 29010037SARM gem5 Developers DPRINTF(TLB, "Flushing TLB entries with asid: %#x (%s lookup)\n", asn, 29110037SARM gem5 Developers (secure_lookup ? "secure" : "non-secure")); 2927404SAli.Saidi@ARM.com 29310037SARM gem5 Developers int x = 0 ; 2947404SAli.Saidi@ARM.com TlbEntry *te; 2957404SAli.Saidi@ARM.com 2967404SAli.Saidi@ARM.com while (x < size) { 2977404SAli.Saidi@ARM.com te = &table[x]; 29810037SARM gem5 Developers if (te->valid && te->asid == asn && secure_lookup == !te->nstid && 29910037SARM gem5 Developers (te->vmid == vmid || secure_lookup) && 30010037SARM gem5 Developers checkELMatch(target_el, te->el, false)) { 30110037SARM gem5 Developers 3027404SAli.Saidi@ARM.com te->valid = false; 30310037SARM gem5 Developers DPRINTF(TLB, " - %s\n", te->print()); 3047734SAli.Saidi@ARM.com flushedEntries++; 3057404SAli.Saidi@ARM.com } 30610037SARM gem5 Developers ++x; 3077404SAli.Saidi@ARM.com } 3087734SAli.Saidi@ARM.com flushTlbAsid++; 3097404SAli.Saidi@ARM.com} 3107404SAli.Saidi@ARM.com 3117404SAli.Saidi@ARM.comvoid 31210037SARM gem5 DevelopersTLB::flushMva(Addr mva, bool secure_lookup, bool hyp, uint8_t target_el) 3137404SAli.Saidi@ARM.com{ 31410037SARM gem5 Developers DPRINTF(TLB, "Flushing TLB entries with mva: %#x (%s lookup)\n", mva, 31510037SARM gem5 Developers (secure_lookup ? "secure" : "non-secure")); 31610037SARM gem5 Developers _flushMva(mva, 0xbeef, secure_lookup, hyp, true, target_el); 31710037SARM gem5 Developers flushTlbMva++; 31810037SARM gem5 Developers} 3197404SAli.Saidi@ARM.com 32010037SARM gem5 Developersvoid 32110037SARM gem5 DevelopersTLB::_flushMva(Addr mva, uint64_t asn, bool secure_lookup, bool hyp, 32210037SARM gem5 Developers bool ignore_asn, uint8_t target_el) 32310037SARM gem5 Developers{ 3247404SAli.Saidi@ARM.com TlbEntry *te; 32510037SARM gem5 Developers // D5.7.2: Sign-extend address to 64 bits 32610037SARM gem5 Developers mva = sext<56>(mva); 32710037SARM gem5 Developers te = lookup(mva, asn, vmid, hyp, secure_lookup, false, ignore_asn, 32810037SARM gem5 Developers target_el); 32910037SARM gem5 Developers while (te != NULL) { 33010037SARM gem5 Developers if (secure_lookup == !te->nstid) { 33110037SARM gem5 Developers DPRINTF(TLB, " - %s\n", te->print()); 3327404SAli.Saidi@ARM.com te->valid = false; 3337734SAli.Saidi@ARM.com flushedEntries++; 3347404SAli.Saidi@ARM.com } 33510037SARM gem5 Developers te = lookup(mva, asn, vmid, hyp, secure_lookup, false, ignore_asn, 33610037SARM gem5 Developers target_el); 3377404SAli.Saidi@ARM.com } 33810037SARM gem5 Developers} 33910037SARM gem5 Developers 34010037SARM gem5 Developersbool 34110037SARM gem5 DevelopersTLB::checkELMatch(uint8_t target_el, uint8_t tentry_el, bool ignore_el) 34210037SARM gem5 Developers{ 34310037SARM gem5 Developers bool elMatch = true; 34410037SARM gem5 Developers if (!ignore_el) { 34510037SARM gem5 Developers if (target_el == 2 || target_el == 3) { 34610037SARM gem5 Developers elMatch = (tentry_el == target_el); 34710037SARM gem5 Developers } else { 34810037SARM gem5 Developers elMatch = (tentry_el == 0) || (tentry_el == 1); 34910037SARM gem5 Developers } 35010037SARM gem5 Developers } 35110037SARM gem5 Developers return elMatch; 3527404SAli.Saidi@ARM.com} 3537404SAli.Saidi@ARM.com 3546019Shines@cs.fsu.eduvoid 3559439SAndreas.Sandberg@ARM.comTLB::drainResume() 3569439SAndreas.Sandberg@ARM.com{ 3579439SAndreas.Sandberg@ARM.com // We might have unserialized something or switched CPUs, so make 3589439SAndreas.Sandberg@ARM.com // sure to re-read the misc regs. 3599439SAndreas.Sandberg@ARM.com miscRegValid = false; 3609439SAndreas.Sandberg@ARM.com} 3619439SAndreas.Sandberg@ARM.com 3629439SAndreas.Sandberg@ARM.comvoid 36310194SGeoffrey.Blake@arm.comTLB::takeOverFrom(BaseTLB *_otlb) 36410194SGeoffrey.Blake@arm.com{ 36510194SGeoffrey.Blake@arm.com TLB *otlb = dynamic_cast<TLB*>(_otlb); 36610194SGeoffrey.Blake@arm.com /* Make sure we actually have a valid type */ 36710194SGeoffrey.Blake@arm.com if (otlb) { 36810194SGeoffrey.Blake@arm.com _attr = otlb->_attr; 36910194SGeoffrey.Blake@arm.com haveLPAE = otlb->haveLPAE; 37010194SGeoffrey.Blake@arm.com directToStage2 = otlb->directToStage2; 37110194SGeoffrey.Blake@arm.com stage2Req = otlb->stage2Req; 37210194SGeoffrey.Blake@arm.com 37310194SGeoffrey.Blake@arm.com /* Sync the stage2 MMU if they exist in both 37410194SGeoffrey.Blake@arm.com * the old CPU and the new 37510194SGeoffrey.Blake@arm.com */ 37610194SGeoffrey.Blake@arm.com if (!isStage2 && 37710194SGeoffrey.Blake@arm.com stage2Tlb && otlb->stage2Tlb) { 37810194SGeoffrey.Blake@arm.com stage2Tlb->takeOverFrom(otlb->stage2Tlb); 37910194SGeoffrey.Blake@arm.com } 38010194SGeoffrey.Blake@arm.com } else { 38110194SGeoffrey.Blake@arm.com panic("Incompatible TLB type!"); 38210194SGeoffrey.Blake@arm.com } 38310194SGeoffrey.Blake@arm.com} 38410194SGeoffrey.Blake@arm.com 38510194SGeoffrey.Blake@arm.comvoid 3866019Shines@cs.fsu.eduTLB::serialize(ostream &os) 3876019Shines@cs.fsu.edu{ 3887733SAli.Saidi@ARM.com DPRINTF(Checkpoint, "Serializing Arm TLB\n"); 3897733SAli.Saidi@ARM.com 3907733SAli.Saidi@ARM.com SERIALIZE_SCALAR(_attr); 39110037SARM gem5 Developers SERIALIZE_SCALAR(haveLPAE); 39210037SARM gem5 Developers SERIALIZE_SCALAR(directToStage2); 39310037SARM gem5 Developers SERIALIZE_SCALAR(stage2Req); 3948353SAli.Saidi@ARM.com 3958353SAli.Saidi@ARM.com int num_entries = size; 3968353SAli.Saidi@ARM.com SERIALIZE_SCALAR(num_entries); 3977733SAli.Saidi@ARM.com for(int i = 0; i < size; i++){ 3987733SAli.Saidi@ARM.com nameOut(os, csprintf("%s.TlbEntry%d", name(), i)); 3997733SAli.Saidi@ARM.com table[i].serialize(os); 4007733SAli.Saidi@ARM.com } 4016019Shines@cs.fsu.edu} 4026019Shines@cs.fsu.edu 4036019Shines@cs.fsu.eduvoid 4046019Shines@cs.fsu.eduTLB::unserialize(Checkpoint *cp, const string §ion) 4056019Shines@cs.fsu.edu{ 4067733SAli.Saidi@ARM.com DPRINTF(Checkpoint, "Unserializing Arm TLB\n"); 4076019Shines@cs.fsu.edu 4087733SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(_attr); 40910037SARM gem5 Developers UNSERIALIZE_SCALAR(haveLPAE); 41010037SARM gem5 Developers UNSERIALIZE_SCALAR(directToStage2); 41110037SARM gem5 Developers UNSERIALIZE_SCALAR(stage2Req); 41210037SARM gem5 Developers 4138353SAli.Saidi@ARM.com int num_entries; 4148353SAli.Saidi@ARM.com UNSERIALIZE_SCALAR(num_entries); 4158353SAli.Saidi@ARM.com for(int i = 0; i < min(size, num_entries); i++){ 4167733SAli.Saidi@ARM.com table[i].unserialize(cp, csprintf("%s.TlbEntry%d", section, i)); 4177733SAli.Saidi@ARM.com } 4186019Shines@cs.fsu.edu} 4196019Shines@cs.fsu.edu 4206019Shines@cs.fsu.eduvoid 4216019Shines@cs.fsu.eduTLB::regStats() 4226019Shines@cs.fsu.edu{ 4237734SAli.Saidi@ARM.com instHits 4247734SAli.Saidi@ARM.com .name(name() + ".inst_hits") 4257734SAli.Saidi@ARM.com .desc("ITB inst hits") 4267734SAli.Saidi@ARM.com ; 4277734SAli.Saidi@ARM.com 4287734SAli.Saidi@ARM.com instMisses 4297734SAli.Saidi@ARM.com .name(name() + ".inst_misses") 4307734SAli.Saidi@ARM.com .desc("ITB inst misses") 4317734SAli.Saidi@ARM.com ; 4327734SAli.Saidi@ARM.com 4337734SAli.Saidi@ARM.com instAccesses 4347734SAli.Saidi@ARM.com .name(name() + ".inst_accesses") 4357734SAli.Saidi@ARM.com .desc("ITB inst accesses") 4367734SAli.Saidi@ARM.com ; 4377734SAli.Saidi@ARM.com 4387734SAli.Saidi@ARM.com readHits 4396019Shines@cs.fsu.edu .name(name() + ".read_hits") 4406019Shines@cs.fsu.edu .desc("DTB read hits") 4416019Shines@cs.fsu.edu ; 4426019Shines@cs.fsu.edu 4437734SAli.Saidi@ARM.com readMisses 4446019Shines@cs.fsu.edu .name(name() + ".read_misses") 4456019Shines@cs.fsu.edu .desc("DTB read misses") 4466019Shines@cs.fsu.edu ; 4476019Shines@cs.fsu.edu 4487734SAli.Saidi@ARM.com readAccesses 4496019Shines@cs.fsu.edu .name(name() + ".read_accesses") 4506019Shines@cs.fsu.edu .desc("DTB read accesses") 4516019Shines@cs.fsu.edu ; 4526019Shines@cs.fsu.edu 4537734SAli.Saidi@ARM.com writeHits 4546019Shines@cs.fsu.edu .name(name() + ".write_hits") 4556019Shines@cs.fsu.edu .desc("DTB write hits") 4566019Shines@cs.fsu.edu ; 4576019Shines@cs.fsu.edu 4587734SAli.Saidi@ARM.com writeMisses 4596019Shines@cs.fsu.edu .name(name() + ".write_misses") 4606019Shines@cs.fsu.edu .desc("DTB write misses") 4616019Shines@cs.fsu.edu ; 4626019Shines@cs.fsu.edu 4637734SAli.Saidi@ARM.com writeAccesses 4646019Shines@cs.fsu.edu .name(name() + ".write_accesses") 4656019Shines@cs.fsu.edu .desc("DTB write accesses") 4666019Shines@cs.fsu.edu ; 4676019Shines@cs.fsu.edu 4686019Shines@cs.fsu.edu hits 4696019Shines@cs.fsu.edu .name(name() + ".hits") 4706019Shines@cs.fsu.edu .desc("DTB hits") 4716019Shines@cs.fsu.edu ; 4726019Shines@cs.fsu.edu 4736019Shines@cs.fsu.edu misses 4746019Shines@cs.fsu.edu .name(name() + ".misses") 4756019Shines@cs.fsu.edu .desc("DTB misses") 4766019Shines@cs.fsu.edu ; 4776019Shines@cs.fsu.edu 4786019Shines@cs.fsu.edu accesses 4796019Shines@cs.fsu.edu .name(name() + ".accesses") 4806019Shines@cs.fsu.edu .desc("DTB accesses") 4816019Shines@cs.fsu.edu ; 4826019Shines@cs.fsu.edu 4837734SAli.Saidi@ARM.com flushTlb 4847734SAli.Saidi@ARM.com .name(name() + ".flush_tlb") 4857734SAli.Saidi@ARM.com .desc("Number of times complete TLB was flushed") 4867734SAli.Saidi@ARM.com ; 4877734SAli.Saidi@ARM.com 4887734SAli.Saidi@ARM.com flushTlbMva 4897734SAli.Saidi@ARM.com .name(name() + ".flush_tlb_mva") 4907734SAli.Saidi@ARM.com .desc("Number of times TLB was flushed by MVA") 4917734SAli.Saidi@ARM.com ; 4927734SAli.Saidi@ARM.com 4937734SAli.Saidi@ARM.com flushTlbMvaAsid 4947734SAli.Saidi@ARM.com .name(name() + ".flush_tlb_mva_asid") 4957734SAli.Saidi@ARM.com .desc("Number of times TLB was flushed by MVA & ASID") 4967734SAli.Saidi@ARM.com ; 4977734SAli.Saidi@ARM.com 4987734SAli.Saidi@ARM.com flushTlbAsid 4997734SAli.Saidi@ARM.com .name(name() + ".flush_tlb_asid") 5007734SAli.Saidi@ARM.com .desc("Number of times TLB was flushed by ASID") 5017734SAli.Saidi@ARM.com ; 5027734SAli.Saidi@ARM.com 5037734SAli.Saidi@ARM.com flushedEntries 5047734SAli.Saidi@ARM.com .name(name() + ".flush_entries") 5057734SAli.Saidi@ARM.com .desc("Number of entries that have been flushed from TLB") 5067734SAli.Saidi@ARM.com ; 5077734SAli.Saidi@ARM.com 5087734SAli.Saidi@ARM.com alignFaults 5097734SAli.Saidi@ARM.com .name(name() + ".align_faults") 5107734SAli.Saidi@ARM.com .desc("Number of TLB faults due to alignment restrictions") 5117734SAli.Saidi@ARM.com ; 5127734SAli.Saidi@ARM.com 5137734SAli.Saidi@ARM.com prefetchFaults 5147734SAli.Saidi@ARM.com .name(name() + ".prefetch_faults") 5157734SAli.Saidi@ARM.com .desc("Number of TLB faults due to prefetch") 5167734SAli.Saidi@ARM.com ; 5177734SAli.Saidi@ARM.com 5187734SAli.Saidi@ARM.com domainFaults 5197734SAli.Saidi@ARM.com .name(name() + ".domain_faults") 5207734SAli.Saidi@ARM.com .desc("Number of TLB faults due to domain restrictions") 5217734SAli.Saidi@ARM.com ; 5227734SAli.Saidi@ARM.com 5237734SAli.Saidi@ARM.com permsFaults 5247734SAli.Saidi@ARM.com .name(name() + ".perms_faults") 5257734SAli.Saidi@ARM.com .desc("Number of TLB faults due to permissions restrictions") 5267734SAli.Saidi@ARM.com ; 5277734SAli.Saidi@ARM.com 5287734SAli.Saidi@ARM.com instAccesses = instHits + instMisses; 5297734SAli.Saidi@ARM.com readAccesses = readHits + readMisses; 5307734SAli.Saidi@ARM.com writeAccesses = writeHits + writeMisses; 5317734SAli.Saidi@ARM.com hits = readHits + writeHits + instHits; 5327734SAli.Saidi@ARM.com misses = readMisses + writeMisses + instMisses; 5337734SAli.Saidi@ARM.com accesses = readAccesses + writeAccesses + instAccesses; 5346019Shines@cs.fsu.edu} 5356019Shines@cs.fsu.edu 53610463SAndreas.Sandberg@ARM.comvoid 53710463SAndreas.Sandberg@ARM.comTLB::regProbePoints() 53810463SAndreas.Sandberg@ARM.com{ 53910463SAndreas.Sandberg@ARM.com ppRefills.reset(new ProbePoints::PMU(getProbeManager(), "Refills")); 54010463SAndreas.Sandberg@ARM.com} 54110463SAndreas.Sandberg@ARM.com 5427404SAli.Saidi@ARM.comFault 5437404SAli.Saidi@ARM.comTLB::translateSe(RequestPtr req, ThreadContext *tc, Mode mode, 54410037SARM gem5 Developers Translation *translation, bool &delay, bool timing) 5457404SAli.Saidi@ARM.com{ 54610037SARM gem5 Developers updateMiscReg(tc); 54710037SARM gem5 Developers Addr vaddr_tainted = req->getVaddr(); 54810037SARM gem5 Developers Addr vaddr = 0; 54910037SARM gem5 Developers if (aarch64) 55010854SNathanael.Premillieu@arm.com vaddr = purifyTaggedAddr(vaddr_tainted, tc, aarch64EL, ttbcr); 55110037SARM gem5 Developers else 55210037SARM gem5 Developers vaddr = vaddr_tainted; 5537294Sgblack@eecs.umich.edu uint32_t flags = req->getFlags(); 5547294Sgblack@eecs.umich.edu 5557404SAli.Saidi@ARM.com bool is_fetch = (mode == Execute); 5567404SAli.Saidi@ARM.com bool is_write = (mode == Write); 5577404SAli.Saidi@ARM.com 5587404SAli.Saidi@ARM.com if (!is_fetch) { 5597294Sgblack@eecs.umich.edu assert(flags & MustBeOne); 5607404SAli.Saidi@ARM.com if (sctlr.a || !(flags & AllowUnaligned)) { 56110037SARM gem5 Developers if (vaddr & mask(flags & AlignmentMask)) { 56210037SARM gem5 Developers // LPAE is always disabled in SE mode 56310474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 56410474Sandreas.hansson@arm.com vaddr_tainted, 56510474Sandreas.hansson@arm.com TlbEntry::DomainType::NoAccess, is_write, 56610474Sandreas.hansson@arm.com ArmFault::AlignmentFault, isStage2, 56710474Sandreas.hansson@arm.com ArmFault::VmsaTran); 5687294Sgblack@eecs.umich.edu } 5697294Sgblack@eecs.umich.edu } 5707294Sgblack@eecs.umich.edu } 5716019Shines@cs.fsu.edu 5727093Sgblack@eecs.umich.edu Addr paddr; 5737404SAli.Saidi@ARM.com Process *p = tc->getProcessPtr(); 5747404SAli.Saidi@ARM.com 5757093Sgblack@eecs.umich.edu if (!p->pTable->translate(vaddr, paddr)) 57610474Sandreas.hansson@arm.com return std::make_shared<GenericPageTableFault>(vaddr_tainted); 5777093Sgblack@eecs.umich.edu req->setPaddr(paddr); 5786019Shines@cs.fsu.edu 5796019Shines@cs.fsu.edu return NoFault; 5807404SAli.Saidi@ARM.com} 5817404SAli.Saidi@ARM.com 5827404SAli.Saidi@ARM.comFault 58310037SARM gem5 DevelopersTLB::trickBoxCheck(RequestPtr req, Mode mode, TlbEntry::DomainType domain) 5847406SAli.Saidi@ARM.com{ 5857406SAli.Saidi@ARM.com return NoFault; 5867406SAli.Saidi@ARM.com} 5877406SAli.Saidi@ARM.com 5887406SAli.Saidi@ARM.comFault 58910037SARM gem5 DevelopersTLB::walkTrickBoxCheck(Addr pa, bool is_secure, Addr va, Addr sz, bool is_exec, 59010037SARM gem5 Developers bool is_write, TlbEntry::DomainType domain, LookupLevel lookup_level) 5917406SAli.Saidi@ARM.com{ 5927406SAli.Saidi@ARM.com return NoFault; 5937406SAli.Saidi@ARM.com} 5947406SAli.Saidi@ARM.com 5957406SAli.Saidi@ARM.comFault 59610037SARM gem5 DevelopersTLB::checkPermissions(TlbEntry *te, RequestPtr req, Mode mode) 59710037SARM gem5 Developers{ 59810037SARM gem5 Developers Addr vaddr = req->getVaddr(); // 32-bit don't have to purify 59910037SARM gem5 Developers uint32_t flags = req->getFlags(); 60010037SARM gem5 Developers bool is_fetch = (mode == Execute); 60110037SARM gem5 Developers bool is_write = (mode == Write); 60210037SARM gem5 Developers bool is_priv = isPriv && !(flags & UserMode); 60310037SARM gem5 Developers 60410037SARM gem5 Developers // Get the translation type from the actuall table entry 60510037SARM gem5 Developers ArmFault::TranMethod tranMethod = te->longDescFormat ? ArmFault::LpaeTran 60610037SARM gem5 Developers : ArmFault::VmsaTran; 60710037SARM gem5 Developers 60810037SARM gem5 Developers // If this is the second stage of translation and the request is for a 60910037SARM gem5 Developers // stage 1 page table walk then we need to check the HCR.PTW bit. This 61010037SARM gem5 Developers // allows us to generate a fault if the request targets an area marked 61110037SARM gem5 Developers // as a device or strongly ordered. 61210037SARM gem5 Developers if (isStage2 && req->isPTWalk() && hcr.ptw && 61310037SARM gem5 Developers (te->mtype != TlbEntry::MemoryType::Normal)) { 61410474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 61510474Sandreas.hansson@arm.com vaddr, te->domain, is_write, 61610474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 61710474Sandreas.hansson@arm.com isStage2, tranMethod); 61810037SARM gem5 Developers } 61910037SARM gem5 Developers 62010037SARM gem5 Developers // Generate an alignment fault for unaligned data accesses to device or 62110037SARM gem5 Developers // strongly ordered memory 62210037SARM gem5 Developers if (!is_fetch) { 62310037SARM gem5 Developers if (te->mtype != TlbEntry::MemoryType::Normal) { 62410037SARM gem5 Developers if (vaddr & mask(flags & AlignmentMask)) { 62510037SARM gem5 Developers alignFaults++; 62610474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 62710474Sandreas.hansson@arm.com vaddr, TlbEntry::DomainType::NoAccess, is_write, 62810474Sandreas.hansson@arm.com ArmFault::AlignmentFault, isStage2, 62910474Sandreas.hansson@arm.com tranMethod); 63010037SARM gem5 Developers } 63110037SARM gem5 Developers } 63210037SARM gem5 Developers } 63310037SARM gem5 Developers 63410037SARM gem5 Developers if (te->nonCacheable) { 63510037SARM gem5 Developers // Prevent prefetching from I/O devices. 63610037SARM gem5 Developers if (req->isPrefetch()) { 63710037SARM gem5 Developers // Here we can safely use the fault status for the short 63810037SARM gem5 Developers // desc. format in all cases 63910474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 64010474Sandreas.hansson@arm.com vaddr, ArmFault::PrefetchUncacheable, 64110474Sandreas.hansson@arm.com isStage2, tranMethod); 64210037SARM gem5 Developers } 64310037SARM gem5 Developers } 64410037SARM gem5 Developers 64510037SARM gem5 Developers if (!te->longDescFormat) { 64610037SARM gem5 Developers switch ((dacr >> (static_cast<uint8_t>(te->domain) * 2)) & 0x3) { 64710037SARM gem5 Developers case 0: 64810037SARM gem5 Developers domainFaults++; 64910037SARM gem5 Developers DPRINTF(TLB, "TLB Fault: Data abort on domain. DACR: %#x" 65010037SARM gem5 Developers " domain: %#x write:%d\n", dacr, 65110037SARM gem5 Developers static_cast<uint8_t>(te->domain), is_write); 65210037SARM gem5 Developers if (is_fetch) 65310474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 65410474Sandreas.hansson@arm.com vaddr, 65510474Sandreas.hansson@arm.com ArmFault::DomainLL + te->lookupLevel, 65610474Sandreas.hansson@arm.com isStage2, tranMethod); 65710037SARM gem5 Developers else 65810474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 65910474Sandreas.hansson@arm.com vaddr, te->domain, is_write, 66010474Sandreas.hansson@arm.com ArmFault::DomainLL + te->lookupLevel, 66110474Sandreas.hansson@arm.com isStage2, tranMethod); 66210037SARM gem5 Developers case 1: 66310037SARM gem5 Developers // Continue with permissions check 66410037SARM gem5 Developers break; 66510037SARM gem5 Developers case 2: 66610037SARM gem5 Developers panic("UNPRED domain\n"); 66710037SARM gem5 Developers case 3: 66810037SARM gem5 Developers return NoFault; 66910037SARM gem5 Developers } 67010037SARM gem5 Developers } 67110037SARM gem5 Developers 67210037SARM gem5 Developers // The 'ap' variable is AP[2:0] or {AP[2,1],1b'0}, i.e. always three bits 67310037SARM gem5 Developers uint8_t ap = te->longDescFormat ? te->ap << 1 : te->ap; 67410037SARM gem5 Developers uint8_t hap = te->hap; 67510037SARM gem5 Developers 67610037SARM gem5 Developers if (sctlr.afe == 1 || te->longDescFormat) 67710037SARM gem5 Developers ap |= 1; 67810037SARM gem5 Developers 67910037SARM gem5 Developers bool abt; 68010037SARM gem5 Developers bool isWritable = true; 68110037SARM gem5 Developers // If this is a stage 2 access (eg for reading stage 1 page table entries) 68210037SARM gem5 Developers // then don't perform the AP permissions check, we stil do the HAP check 68310037SARM gem5 Developers // below. 68410037SARM gem5 Developers if (isStage2) { 68510037SARM gem5 Developers abt = false; 68610037SARM gem5 Developers } else { 68710037SARM gem5 Developers switch (ap) { 68810037SARM gem5 Developers case 0: 68910037SARM gem5 Developers DPRINTF(TLB, "Access permissions 0, checking rs:%#x\n", 69010037SARM gem5 Developers (int)sctlr.rs); 69110037SARM gem5 Developers if (!sctlr.xp) { 69210037SARM gem5 Developers switch ((int)sctlr.rs) { 69310037SARM gem5 Developers case 2: 69410037SARM gem5 Developers abt = is_write; 69510037SARM gem5 Developers break; 69610037SARM gem5 Developers case 1: 69710037SARM gem5 Developers abt = is_write || !is_priv; 69810037SARM gem5 Developers break; 69910037SARM gem5 Developers case 0: 70010037SARM gem5 Developers case 3: 70110037SARM gem5 Developers default: 70210037SARM gem5 Developers abt = true; 70310037SARM gem5 Developers break; 70410037SARM gem5 Developers } 70510037SARM gem5 Developers } else { 70610037SARM gem5 Developers abt = true; 70710037SARM gem5 Developers } 70810037SARM gem5 Developers break; 70910037SARM gem5 Developers case 1: 71010037SARM gem5 Developers abt = !is_priv; 71110037SARM gem5 Developers break; 71210037SARM gem5 Developers case 2: 71310037SARM gem5 Developers abt = !is_priv && is_write; 71410037SARM gem5 Developers isWritable = is_priv; 71510037SARM gem5 Developers break; 71610037SARM gem5 Developers case 3: 71710037SARM gem5 Developers abt = false; 71810037SARM gem5 Developers break; 71910037SARM gem5 Developers case 4: 72010037SARM gem5 Developers panic("UNPRED premissions\n"); 72110037SARM gem5 Developers case 5: 72210037SARM gem5 Developers abt = !is_priv || is_write; 72310037SARM gem5 Developers isWritable = false; 72410037SARM gem5 Developers break; 72510037SARM gem5 Developers case 6: 72610037SARM gem5 Developers case 7: 72710037SARM gem5 Developers abt = is_write; 72810037SARM gem5 Developers isWritable = false; 72910037SARM gem5 Developers break; 73010037SARM gem5 Developers default: 73110037SARM gem5 Developers panic("Unknown permissions %#x\n", ap); 73210037SARM gem5 Developers } 73310037SARM gem5 Developers } 73410037SARM gem5 Developers 73510037SARM gem5 Developers bool hapAbt = is_write ? !(hap & 2) : !(hap & 1); 73610037SARM gem5 Developers bool xn = te->xn || (isWritable && sctlr.wxn) || 73710037SARM gem5 Developers (ap == 3 && sctlr.uwxn && is_priv); 73810037SARM gem5 Developers if (is_fetch && (abt || xn || 73910037SARM gem5 Developers (te->longDescFormat && te->pxn && !is_priv) || 74010037SARM gem5 Developers (isSecure && te->ns && scr.sif))) { 74110037SARM gem5 Developers permsFaults++; 74210037SARM gem5 Developers DPRINTF(TLB, "TLB Fault: Prefetch abort on permission check. AP:%d " 74310037SARM gem5 Developers "priv:%d write:%d ns:%d sif:%d sctlr.afe: %d \n", 74410037SARM gem5 Developers ap, is_priv, is_write, te->ns, scr.sif,sctlr.afe); 74510474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 74610474Sandreas.hansson@arm.com vaddr, 74710474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 74810474Sandreas.hansson@arm.com isStage2, tranMethod); 74910037SARM gem5 Developers } else if (abt | hapAbt) { 75010037SARM gem5 Developers permsFaults++; 75110037SARM gem5 Developers DPRINTF(TLB, "TLB Fault: Data abort on permission check. AP:%d priv:%d" 75210037SARM gem5 Developers " write:%d\n", ap, is_priv, is_write); 75310474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 75410474Sandreas.hansson@arm.com vaddr, te->domain, is_write, 75510474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 75610474Sandreas.hansson@arm.com isStage2 | !abt, tranMethod); 75710037SARM gem5 Developers } 75810037SARM gem5 Developers return NoFault; 75910037SARM gem5 Developers} 76010037SARM gem5 Developers 76110037SARM gem5 Developers 76210037SARM gem5 DevelopersFault 76310037SARM gem5 DevelopersTLB::checkPermissions64(TlbEntry *te, RequestPtr req, Mode mode, 76410037SARM gem5 Developers ThreadContext *tc) 76510037SARM gem5 Developers{ 76610037SARM gem5 Developers assert(aarch64); 76710037SARM gem5 Developers 76810037SARM gem5 Developers Addr vaddr_tainted = req->getVaddr(); 76910854SNathanael.Premillieu@arm.com Addr vaddr = purifyTaggedAddr(vaddr_tainted, tc, aarch64EL, ttbcr); 77010037SARM gem5 Developers 77110037SARM gem5 Developers uint32_t flags = req->getFlags(); 77210037SARM gem5 Developers bool is_fetch = (mode == Execute); 77310037SARM gem5 Developers bool is_write = (mode == Write); 77410037SARM gem5 Developers bool is_priv M5_VAR_USED = isPriv && !(flags & UserMode); 77510037SARM gem5 Developers 77610037SARM gem5 Developers updateMiscReg(tc, curTranType); 77710037SARM gem5 Developers 77810037SARM gem5 Developers // If this is the second stage of translation and the request is for a 77910037SARM gem5 Developers // stage 1 page table walk then we need to check the HCR.PTW bit. This 78010037SARM gem5 Developers // allows us to generate a fault if the request targets an area marked 78110037SARM gem5 Developers // as a device or strongly ordered. 78210037SARM gem5 Developers if (isStage2 && req->isPTWalk() && hcr.ptw && 78310037SARM gem5 Developers (te->mtype != TlbEntry::MemoryType::Normal)) { 78410474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 78510474Sandreas.hansson@arm.com vaddr_tainted, te->domain, is_write, 78610474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 78710474Sandreas.hansson@arm.com isStage2, ArmFault::LpaeTran); 78810037SARM gem5 Developers } 78910037SARM gem5 Developers 79010037SARM gem5 Developers // Generate an alignment fault for unaligned accesses to device or 79110037SARM gem5 Developers // strongly ordered memory 79210037SARM gem5 Developers if (!is_fetch) { 79310037SARM gem5 Developers if (te->mtype != TlbEntry::MemoryType::Normal) { 79410037SARM gem5 Developers if (vaddr & mask(flags & AlignmentMask)) { 79510037SARM gem5 Developers alignFaults++; 79610474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 79710474Sandreas.hansson@arm.com vaddr_tainted, 79810474Sandreas.hansson@arm.com TlbEntry::DomainType::NoAccess, is_write, 79910474Sandreas.hansson@arm.com ArmFault::AlignmentFault, isStage2, 80010474Sandreas.hansson@arm.com ArmFault::LpaeTran); 80110037SARM gem5 Developers } 80210037SARM gem5 Developers } 80310037SARM gem5 Developers } 80410037SARM gem5 Developers 80510037SARM gem5 Developers if (te->nonCacheable) { 80610037SARM gem5 Developers // Prevent prefetching from I/O devices. 80710037SARM gem5 Developers if (req->isPrefetch()) { 80810037SARM gem5 Developers // Here we can safely use the fault status for the short 80910037SARM gem5 Developers // desc. format in all cases 81010474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 81110474Sandreas.hansson@arm.com vaddr_tainted, 81210474Sandreas.hansson@arm.com ArmFault::PrefetchUncacheable, 81310474Sandreas.hansson@arm.com isStage2, ArmFault::LpaeTran); 81410037SARM gem5 Developers } 81510037SARM gem5 Developers } 81610037SARM gem5 Developers 81710037SARM gem5 Developers uint8_t ap = 0x3 & (te->ap); // 2-bit access protection field 81810037SARM gem5 Developers bool grant = false; 81910037SARM gem5 Developers 82010037SARM gem5 Developers uint8_t xn = te->xn; 82110037SARM gem5 Developers uint8_t pxn = te->pxn; 82210037SARM gem5 Developers bool r = !is_write && !is_fetch; 82310037SARM gem5 Developers bool w = is_write; 82410037SARM gem5 Developers bool x = is_fetch; 82510037SARM gem5 Developers DPRINTF(TLBVerbose, "Checking permissions: ap:%d, xn:%d, pxn:%d, r:%d, " 82610037SARM gem5 Developers "w:%d, x:%d\n", ap, xn, pxn, r, w, x); 82710037SARM gem5 Developers 82810037SARM gem5 Developers if (isStage2) { 82910037SARM gem5 Developers panic("Virtualization in AArch64 state is not supported yet"); 83010037SARM gem5 Developers } else { 83110037SARM gem5 Developers switch (aarch64EL) { 83210037SARM gem5 Developers case EL0: 83310037SARM gem5 Developers { 83410037SARM gem5 Developers uint8_t perm = (ap << 2) | (xn << 1) | pxn; 83510037SARM gem5 Developers switch (perm) { 83610037SARM gem5 Developers case 0: 83710037SARM gem5 Developers case 1: 83810037SARM gem5 Developers case 8: 83910037SARM gem5 Developers case 9: 84010037SARM gem5 Developers grant = x; 84110037SARM gem5 Developers break; 84210037SARM gem5 Developers case 4: 84310037SARM gem5 Developers case 5: 84410037SARM gem5 Developers grant = r || w || (x && !sctlr.wxn); 84510037SARM gem5 Developers break; 84610037SARM gem5 Developers case 6: 84710037SARM gem5 Developers case 7: 84810037SARM gem5 Developers grant = r || w; 84910037SARM gem5 Developers break; 85010037SARM gem5 Developers case 12: 85110037SARM gem5 Developers case 13: 85210037SARM gem5 Developers grant = r || x; 85310037SARM gem5 Developers break; 85410037SARM gem5 Developers case 14: 85510037SARM gem5 Developers case 15: 85610037SARM gem5 Developers grant = r; 85710037SARM gem5 Developers break; 85810037SARM gem5 Developers default: 85910037SARM gem5 Developers grant = false; 86010037SARM gem5 Developers } 86110037SARM gem5 Developers } 86210037SARM gem5 Developers break; 86310037SARM gem5 Developers case EL1: 86410037SARM gem5 Developers { 86510037SARM gem5 Developers uint8_t perm = (ap << 2) | (xn << 1) | pxn; 86610037SARM gem5 Developers switch (perm) { 86710037SARM gem5 Developers case 0: 86810037SARM gem5 Developers case 2: 86910037SARM gem5 Developers grant = r || w || (x && !sctlr.wxn); 87010037SARM gem5 Developers break; 87110037SARM gem5 Developers case 1: 87210037SARM gem5 Developers case 3: 87310037SARM gem5 Developers case 4: 87410037SARM gem5 Developers case 5: 87510037SARM gem5 Developers case 6: 87610037SARM gem5 Developers case 7: 87710037SARM gem5 Developers // regions that are writeable at EL0 should not be 87810037SARM gem5 Developers // executable at EL1 87910037SARM gem5 Developers grant = r || w; 88010037SARM gem5 Developers break; 88110037SARM gem5 Developers case 8: 88210037SARM gem5 Developers case 10: 88310037SARM gem5 Developers case 12: 88410037SARM gem5 Developers case 14: 88510037SARM gem5 Developers grant = r || x; 88610037SARM gem5 Developers break; 88710037SARM gem5 Developers case 9: 88810037SARM gem5 Developers case 11: 88910037SARM gem5 Developers case 13: 89010037SARM gem5 Developers case 15: 89110037SARM gem5 Developers grant = r; 89210037SARM gem5 Developers break; 89310037SARM gem5 Developers default: 89410037SARM gem5 Developers grant = false; 89510037SARM gem5 Developers } 89610037SARM gem5 Developers } 89710037SARM gem5 Developers break; 89810037SARM gem5 Developers case EL2: 89910037SARM gem5 Developers case EL3: 90010037SARM gem5 Developers { 90110037SARM gem5 Developers uint8_t perm = (ap & 0x2) | xn; 90210037SARM gem5 Developers switch (perm) { 90310037SARM gem5 Developers case 0: 90410037SARM gem5 Developers grant = r || w || (x && !sctlr.wxn) ; 90510037SARM gem5 Developers break; 90610037SARM gem5 Developers case 1: 90710037SARM gem5 Developers grant = r || w; 90810037SARM gem5 Developers break; 90910037SARM gem5 Developers case 2: 91010037SARM gem5 Developers grant = r || x; 91110037SARM gem5 Developers break; 91210037SARM gem5 Developers case 3: 91310037SARM gem5 Developers grant = r; 91410037SARM gem5 Developers break; 91510037SARM gem5 Developers default: 91610037SARM gem5 Developers grant = false; 91710037SARM gem5 Developers } 91810037SARM gem5 Developers } 91910037SARM gem5 Developers break; 92010037SARM gem5 Developers } 92110037SARM gem5 Developers } 92210037SARM gem5 Developers 92310037SARM gem5 Developers if (!grant) { 92410037SARM gem5 Developers if (is_fetch) { 92510037SARM gem5 Developers permsFaults++; 92610037SARM gem5 Developers DPRINTF(TLB, "TLB Fault: Prefetch abort on permission check. " 92710037SARM gem5 Developers "AP:%d priv:%d write:%d ns:%d sif:%d " 92810037SARM gem5 Developers "sctlr.afe: %d\n", 92910037SARM gem5 Developers ap, is_priv, is_write, te->ns, scr.sif, sctlr.afe); 93010037SARM gem5 Developers // Use PC value instead of vaddr because vaddr might be aligned to 93110037SARM gem5 Developers // cache line and should not be the address reported in FAR 93210474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 93310474Sandreas.hansson@arm.com req->getPC(), 93410474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 93510474Sandreas.hansson@arm.com isStage2, ArmFault::LpaeTran); 93610037SARM gem5 Developers } else { 93710037SARM gem5 Developers permsFaults++; 93810037SARM gem5 Developers DPRINTF(TLB, "TLB Fault: Data abort on permission check. AP:%d " 93910037SARM gem5 Developers "priv:%d write:%d\n", ap, is_priv, is_write); 94010474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 94110474Sandreas.hansson@arm.com vaddr_tainted, te->domain, is_write, 94210474Sandreas.hansson@arm.com ArmFault::PermissionLL + te->lookupLevel, 94310474Sandreas.hansson@arm.com isStage2, ArmFault::LpaeTran); 94410037SARM gem5 Developers } 94510037SARM gem5 Developers } 94610037SARM gem5 Developers 94710037SARM gem5 Developers return NoFault; 94810037SARM gem5 Developers} 94910037SARM gem5 Developers 95010037SARM gem5 DevelopersFault 9517404SAli.Saidi@ARM.comTLB::translateFs(RequestPtr req, ThreadContext *tc, Mode mode, 95210037SARM gem5 Developers Translation *translation, bool &delay, bool timing, 95310037SARM gem5 Developers TLB::ArmTranslationType tranType, bool functional) 9547404SAli.Saidi@ARM.com{ 9558733Sgeoffrey.blake@arm.com // No such thing as a functional timing access 9568733Sgeoffrey.blake@arm.com assert(!(timing && functional)); 9578733Sgeoffrey.blake@arm.com 95810037SARM gem5 Developers updateMiscReg(tc, tranType); 95910037SARM gem5 Developers 96010037SARM gem5 Developers Addr vaddr_tainted = req->getVaddr(); 96110037SARM gem5 Developers Addr vaddr = 0; 96210037SARM gem5 Developers if (aarch64) 96310854SNathanael.Premillieu@arm.com vaddr = purifyTaggedAddr(vaddr_tainted, tc, aarch64EL, ttbcr); 96410037SARM gem5 Developers else 96510037SARM gem5 Developers vaddr = vaddr_tainted; 96610037SARM gem5 Developers uint32_t flags = req->getFlags(); 96710037SARM gem5 Developers 96810037SARM gem5 Developers bool is_fetch = (mode == Execute); 96910037SARM gem5 Developers bool is_write = (mode == Write); 97010037SARM gem5 Developers bool long_desc_format = aarch64 || (haveLPAE && ttbcr.eae); 97110037SARM gem5 Developers ArmFault::TranMethod tranMethod = long_desc_format ? ArmFault::LpaeTran 97210037SARM gem5 Developers : ArmFault::VmsaTran; 97310037SARM gem5 Developers 97410037SARM gem5 Developers req->setAsid(asid); 97510037SARM gem5 Developers 97610037SARM gem5 Developers DPRINTF(TLBVerbose, "CPSR is priv:%d UserMode:%d secure:%d S1S2NsTran:%d\n", 97710037SARM gem5 Developers isPriv, flags & UserMode, isSecure, tranType & S1S2NsTran); 97810037SARM gem5 Developers 97910037SARM gem5 Developers DPRINTF(TLB, "translateFs addr %#x, mode %d, st2 %d, scr %#x sctlr %#x " 98010037SARM gem5 Developers "flags %#x tranType 0x%x\n", vaddr_tainted, mode, isStage2, 98110037SARM gem5 Developers scr, sctlr, flags, tranType); 98210037SARM gem5 Developers 9837603SGene.Wu@arm.com // If this is a clrex instruction, provide a PA of 0 with no fault 9847603SGene.Wu@arm.com // This will force the monitor to set the tracked address to 0 9857603SGene.Wu@arm.com // a bit of a hack but this effectively clrears this processors monitor 9867705Sgblack@eecs.umich.edu if (flags & Request::CLEAR_LL){ 98710037SARM gem5 Developers // @todo: check implications of security extensions 9887603SGene.Wu@arm.com req->setPaddr(0); 98910824SAndreas.Sandberg@ARM.com req->setFlags(Request::UNCACHEABLE | Request::STRICT_ORDER); 9907705Sgblack@eecs.umich.edu req->setFlags(Request::CLEAR_LL); 9917603SGene.Wu@arm.com return NoFault; 9927603SGene.Wu@arm.com } 9937608SGene.Wu@arm.com if ((req->isInstFetch() && (!sctlr.i)) || 9947608SGene.Wu@arm.com ((!req->isInstFetch()) && (!sctlr.c))){ 99510824SAndreas.Sandberg@ARM.com req->setFlags(Request::UNCACHEABLE | Request::STRICT_ORDER); 9967608SGene.Wu@arm.com } 9977404SAli.Saidi@ARM.com if (!is_fetch) { 9987404SAli.Saidi@ARM.com assert(flags & MustBeOne); 9997404SAli.Saidi@ARM.com if (sctlr.a || !(flags & AllowUnaligned)) { 100010037SARM gem5 Developers if (vaddr & mask(flags & AlignmentMask)) { 10017734SAli.Saidi@ARM.com alignFaults++; 100210474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 100310474Sandreas.hansson@arm.com vaddr_tainted, 100410474Sandreas.hansson@arm.com TlbEntry::DomainType::NoAccess, is_write, 100510474Sandreas.hansson@arm.com ArmFault::AlignmentFault, isStage2, 100610474Sandreas.hansson@arm.com tranMethod); 10077404SAli.Saidi@ARM.com } 10087404SAli.Saidi@ARM.com } 10097404SAli.Saidi@ARM.com } 10107404SAli.Saidi@ARM.com 101110037SARM gem5 Developers // If guest MMU is off or hcr.vm=0 go straight to stage2 101210037SARM gem5 Developers if ((isStage2 && !hcr.vm) || (!isStage2 && !sctlr.m)) { 10137404SAli.Saidi@ARM.com 10147093Sgblack@eecs.umich.edu req->setPaddr(vaddr); 101510037SARM gem5 Developers // When the MMU is off the security attribute corresponds to the 101610037SARM gem5 Developers // security state of the processor 101710037SARM gem5 Developers if (isSecure) 101810037SARM gem5 Developers req->setFlags(Request::SECURE); 101910037SARM gem5 Developers 102010037SARM gem5 Developers // @todo: double check this (ARM ARM issue C B3.2.1) 102110037SARM gem5 Developers if (long_desc_format || sctlr.tre == 0) { 102210824SAndreas.Sandberg@ARM.com req->setFlags(Request::UNCACHEABLE | Request::STRICT_ORDER); 10237404SAli.Saidi@ARM.com } else { 10247404SAli.Saidi@ARM.com if (nmrr.ir0 == 0 || nmrr.or0 == 0 || prrr.tr0 != 0x2) 102510824SAndreas.Sandberg@ARM.com req->setFlags(Request::UNCACHEABLE | Request::STRICT_ORDER); 10267404SAli.Saidi@ARM.com } 10277436Sdam.sunwoo@arm.com 10287436Sdam.sunwoo@arm.com // Set memory attributes 10297436Sdam.sunwoo@arm.com TlbEntry temp_te; 103010037SARM gem5 Developers temp_te.ns = !isSecure; 103110037SARM gem5 Developers if (isStage2 || hcr.dc == 0 || isSecure || 103210037SARM gem5 Developers (isHyp && !(tranType & S1CTran))) { 103310037SARM gem5 Developers 103410037SARM gem5 Developers temp_te.mtype = is_fetch ? TlbEntry::MemoryType::Normal 103510037SARM gem5 Developers : TlbEntry::MemoryType::StronglyOrdered; 103610037SARM gem5 Developers temp_te.innerAttrs = 0x0; 103710037SARM gem5 Developers temp_te.outerAttrs = 0x0; 103810037SARM gem5 Developers temp_te.shareable = true; 103910037SARM gem5 Developers temp_te.outerShareable = true; 104010037SARM gem5 Developers } else { 104110037SARM gem5 Developers temp_te.mtype = TlbEntry::MemoryType::Normal; 104210037SARM gem5 Developers temp_te.innerAttrs = 0x3; 104310037SARM gem5 Developers temp_te.outerAttrs = 0x3; 104410037SARM gem5 Developers temp_te.shareable = false; 104510037SARM gem5 Developers temp_te.outerShareable = false; 104610037SARM gem5 Developers } 104710037SARM gem5 Developers temp_te.setAttributes(long_desc_format); 104810367SAndrew.Bardsley@arm.com DPRINTF(TLBVerbose, "(No MMU) setting memory attributes: shareable: " 104910367SAndrew.Bardsley@arm.com "%d, innerAttrs: %d, outerAttrs: %d, isStage2: %d\n", 105010037SARM gem5 Developers temp_te.shareable, temp_te.innerAttrs, temp_te.outerAttrs, 105110037SARM gem5 Developers isStage2); 10527436Sdam.sunwoo@arm.com setAttr(temp_te.attributes); 10537436Sdam.sunwoo@arm.com 105410037SARM gem5 Developers return trickBoxCheck(req, mode, TlbEntry::DomainType::NoAccess); 10557404SAli.Saidi@ARM.com } 10567404SAli.Saidi@ARM.com 105710037SARM gem5 Developers DPRINTF(TLBVerbose, "Translating %s=%#x context=%d\n", 105810037SARM gem5 Developers isStage2 ? "IPA" : "VA", vaddr_tainted, asid); 10597404SAli.Saidi@ARM.com // Translation enabled 10607404SAli.Saidi@ARM.com 106110037SARM gem5 Developers TlbEntry *te = NULL; 106210037SARM gem5 Developers TlbEntry mergeTe; 106310037SARM gem5 Developers Fault fault = getResultTe(&te, req, tc, mode, translation, timing, 106410037SARM gem5 Developers functional, &mergeTe); 106510037SARM gem5 Developers // only proceed if we have a valid table entry 106610037SARM gem5 Developers if ((te == NULL) && (fault == NoFault)) delay = true; 106710037SARM gem5 Developers 106810037SARM gem5 Developers // If we have the table entry transfer some of the attributes to the 106910037SARM gem5 Developers // request that triggered the translation 107010037SARM gem5 Developers if (te != NULL) { 107110037SARM gem5 Developers // Set memory attributes 107210037SARM gem5 Developers DPRINTF(TLBVerbose, 107310367SAndrew.Bardsley@arm.com "Setting memory attributes: shareable: %d, innerAttrs: %d, " 107410367SAndrew.Bardsley@arm.com "outerAttrs: %d, mtype: %d, isStage2: %d\n", 107510037SARM gem5 Developers te->shareable, te->innerAttrs, te->outerAttrs, 107610037SARM gem5 Developers static_cast<uint8_t>(te->mtype), isStage2); 107710037SARM gem5 Developers setAttr(te->attributes); 107810824SAndreas.Sandberg@ARM.com 107910824SAndreas.Sandberg@ARM.com if (te->nonCacheable) 108010825SAndreas.Sandberg@ARM.com req->setFlags(Request::UNCACHEABLE); 108110825SAndreas.Sandberg@ARM.com 108210825SAndreas.Sandberg@ARM.com // Require requests to be ordered if the request goes to 108310825SAndreas.Sandberg@ARM.com // strongly ordered or device memory (i.e., anything other 108410825SAndreas.Sandberg@ARM.com // than normal memory requires strict order). 108510825SAndreas.Sandberg@ARM.com if (te->mtype != TlbEntry::MemoryType::Normal) 108610825SAndreas.Sandberg@ARM.com req->setFlags(Request::STRICT_ORDER); 108710037SARM gem5 Developers 108810508SAli.Saidi@ARM.com Addr pa = te->pAddr(vaddr); 108910508SAli.Saidi@ARM.com req->setPaddr(pa); 109010508SAli.Saidi@ARM.com 109110037SARM gem5 Developers if (isSecure && !te->ns) { 109210037SARM gem5 Developers req->setFlags(Request::SECURE); 109310037SARM gem5 Developers } 109410037SARM gem5 Developers if ((!is_fetch) && (vaddr & mask(flags & AlignmentMask)) && 109510037SARM gem5 Developers (te->mtype != TlbEntry::MemoryType::Normal)) { 109610037SARM gem5 Developers // Unaligned accesses to Device memory should always cause an 109710037SARM gem5 Developers // abort regardless of sctlr.a 109810037SARM gem5 Developers alignFaults++; 109910474Sandreas.hansson@arm.com return std::make_shared<DataAbort>( 110010474Sandreas.hansson@arm.com vaddr_tainted, 110110474Sandreas.hansson@arm.com TlbEntry::DomainType::NoAccess, is_write, 110210474Sandreas.hansson@arm.com ArmFault::AlignmentFault, isStage2, 110310474Sandreas.hansson@arm.com tranMethod); 110410037SARM gem5 Developers } 110510037SARM gem5 Developers 110610037SARM gem5 Developers // Check for a trickbox generated address fault 110710037SARM gem5 Developers if (fault == NoFault) { 110810037SARM gem5 Developers fault = trickBoxCheck(req, mode, te->domain); 110910037SARM gem5 Developers } 111010037SARM gem5 Developers } 111110037SARM gem5 Developers 111210037SARM gem5 Developers // Generate Illegal Inst Set State fault if IL bit is set in CPSR 111310037SARM gem5 Developers if (fault == NoFault) { 111410037SARM gem5 Developers if (aarch64 && is_fetch && cpsr.il == 1) { 111510474Sandreas.hansson@arm.com return std::make_shared<IllegalInstSetStateFault>(); 111610037SARM gem5 Developers } 111710037SARM gem5 Developers } 111810037SARM gem5 Developers 111910037SARM gem5 Developers return fault; 112010037SARM gem5 Developers} 112110037SARM gem5 Developers 112210037SARM gem5 DevelopersFault 112310037SARM gem5 DevelopersTLB::translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode, 112410037SARM gem5 Developers TLB::ArmTranslationType tranType) 112510037SARM gem5 Developers{ 112610037SARM gem5 Developers updateMiscReg(tc, tranType); 112710037SARM gem5 Developers 112810037SARM gem5 Developers if (directToStage2) { 112910037SARM gem5 Developers assert(stage2Tlb); 113010037SARM gem5 Developers return stage2Tlb->translateAtomic(req, tc, mode, tranType); 113110037SARM gem5 Developers } 113210037SARM gem5 Developers 113310037SARM gem5 Developers bool delay = false; 113410037SARM gem5 Developers Fault fault; 113510037SARM gem5 Developers if (FullSystem) 113610037SARM gem5 Developers fault = translateFs(req, tc, mode, NULL, delay, false, tranType); 113710037SARM gem5 Developers else 113810037SARM gem5 Developers fault = translateSe(req, tc, mode, NULL, delay, false); 113910037SARM gem5 Developers assert(!delay); 114010037SARM gem5 Developers return fault; 114110037SARM gem5 Developers} 114210037SARM gem5 Developers 114310037SARM gem5 DevelopersFault 114410037SARM gem5 DevelopersTLB::translateFunctional(RequestPtr req, ThreadContext *tc, Mode mode, 114510037SARM gem5 Developers TLB::ArmTranslationType tranType) 114610037SARM gem5 Developers{ 114710037SARM gem5 Developers updateMiscReg(tc, tranType); 114810037SARM gem5 Developers 114910037SARM gem5 Developers if (directToStage2) { 115010037SARM gem5 Developers assert(stage2Tlb); 115110037SARM gem5 Developers return stage2Tlb->translateFunctional(req, tc, mode, tranType); 115210037SARM gem5 Developers } 115310037SARM gem5 Developers 115410037SARM gem5 Developers bool delay = false; 115510037SARM gem5 Developers Fault fault; 115610037SARM gem5 Developers if (FullSystem) 115710037SARM gem5 Developers fault = translateFs(req, tc, mode, NULL, delay, false, tranType, true); 115810037SARM gem5 Developers else 115910037SARM gem5 Developers fault = translateSe(req, tc, mode, NULL, delay, false); 116010037SARM gem5 Developers assert(!delay); 116110037SARM gem5 Developers return fault; 116210037SARM gem5 Developers} 116310037SARM gem5 Developers 116410037SARM gem5 DevelopersFault 116510037SARM gem5 DevelopersTLB::translateTiming(RequestPtr req, ThreadContext *tc, 116610037SARM gem5 Developers Translation *translation, Mode mode, TLB::ArmTranslationType tranType) 116710037SARM gem5 Developers{ 116810037SARM gem5 Developers updateMiscReg(tc, tranType); 116910037SARM gem5 Developers 117010037SARM gem5 Developers if (directToStage2) { 117110037SARM gem5 Developers assert(stage2Tlb); 117210037SARM gem5 Developers return stage2Tlb->translateTiming(req, tc, translation, mode, tranType); 117310037SARM gem5 Developers } 117410037SARM gem5 Developers 117510037SARM gem5 Developers assert(translation); 117610037SARM gem5 Developers 117710037SARM gem5 Developers return translateComplete(req, tc, translation, mode, tranType, isStage2); 117810037SARM gem5 Developers} 117910037SARM gem5 Developers 118010037SARM gem5 DevelopersFault 118110037SARM gem5 DevelopersTLB::translateComplete(RequestPtr req, ThreadContext *tc, 118210037SARM gem5 Developers Translation *translation, Mode mode, TLB::ArmTranslationType tranType, 118310037SARM gem5 Developers bool callFromS2) 118410037SARM gem5 Developers{ 118510037SARM gem5 Developers bool delay = false; 118610037SARM gem5 Developers Fault fault; 118710037SARM gem5 Developers if (FullSystem) 118810037SARM gem5 Developers fault = translateFs(req, tc, mode, translation, delay, true, tranType); 118910037SARM gem5 Developers else 119010037SARM gem5 Developers fault = translateSe(req, tc, mode, translation, delay, true); 119110037SARM gem5 Developers DPRINTF(TLBVerbose, "Translation returning delay=%d fault=%d\n", delay, fault != 119210037SARM gem5 Developers NoFault); 119310037SARM gem5 Developers // If we have a translation, and we're not in the middle of doing a stage 119410037SARM gem5 Developers // 2 translation tell the translation that we've either finished or its 119510037SARM gem5 Developers // going to take a while. By not doing this when we're in the middle of a 119610037SARM gem5 Developers // stage 2 translation we prevent marking the translation as delayed twice, 119710037SARM gem5 Developers // one when the translation starts and again when the stage 1 translation 119810037SARM gem5 Developers // completes. 119910037SARM gem5 Developers if (translation && (callFromS2 || !stage2Req || req->hasPaddr() || fault != NoFault)) { 120010037SARM gem5 Developers if (!delay) 120110037SARM gem5 Developers translation->finish(fault, req, tc, mode); 120210037SARM gem5 Developers else 120310037SARM gem5 Developers translation->markDelayed(); 120410037SARM gem5 Developers } 120510037SARM gem5 Developers return fault; 120610037SARM gem5 Developers} 120710037SARM gem5 Developers 120810037SARM gem5 DevelopersBaseMasterPort* 120910037SARM gem5 DevelopersTLB::getMasterPort() 121010037SARM gem5 Developers{ 121110717Sandreas.hansson@arm.com return &stage2Mmu->getPort(); 121210037SARM gem5 Developers} 121310037SARM gem5 Developers 121410037SARM gem5 Developersvoid 121510037SARM gem5 DevelopersTLB::updateMiscReg(ThreadContext *tc, ArmTranslationType tranType) 121610037SARM gem5 Developers{ 121710037SARM gem5 Developers // check if the regs have changed, or the translation mode is different. 121810037SARM gem5 Developers // NOTE: the tran type doesn't affect stage 2 TLB's as they only handle 121910037SARM gem5 Developers // one type of translation anyway 122010037SARM gem5 Developers if (miscRegValid && ((tranType == curTranType) || isStage2)) { 122110037SARM gem5 Developers return; 122210037SARM gem5 Developers } 122310037SARM gem5 Developers 122410037SARM gem5 Developers DPRINTF(TLBVerbose, "TLB variables changed!\n"); 122510854SNathanael.Premillieu@arm.com cpsr = tc->readMiscReg(MISCREG_CPSR); 122610037SARM gem5 Developers // Dependencies: SCR/SCR_EL3, CPSR 122710037SARM gem5 Developers isSecure = inSecureState(tc); 122810037SARM gem5 Developers isSecure &= (tranType & HypMode) == 0; 122910037SARM gem5 Developers isSecure &= (tranType & S1S2NsTran) == 0; 123010037SARM gem5 Developers aarch64 = !cpsr.width; 123110037SARM gem5 Developers if (aarch64) { // AArch64 123210037SARM gem5 Developers aarch64EL = (ExceptionLevel) (uint8_t) cpsr.el; 123310037SARM gem5 Developers switch (aarch64EL) { 123410037SARM gem5 Developers case EL0: 123510037SARM gem5 Developers case EL1: 123610037SARM gem5 Developers { 123710037SARM gem5 Developers sctlr = tc->readMiscReg(MISCREG_SCTLR_EL1); 123810037SARM gem5 Developers ttbcr = tc->readMiscReg(MISCREG_TCR_EL1); 123910037SARM gem5 Developers uint64_t ttbr_asid = ttbcr.a1 ? 124010037SARM gem5 Developers tc->readMiscReg(MISCREG_TTBR1_EL1) : 124110037SARM gem5 Developers tc->readMiscReg(MISCREG_TTBR0_EL1); 124210037SARM gem5 Developers asid = bits(ttbr_asid, 124310037SARM gem5 Developers (haveLargeAsid64 && ttbcr.as) ? 63 : 55, 48); 124410037SARM gem5 Developers } 124510037SARM gem5 Developers break; 124610037SARM gem5 Developers case EL2: 124710037SARM gem5 Developers sctlr = tc->readMiscReg(MISCREG_SCTLR_EL2); 124810037SARM gem5 Developers ttbcr = tc->readMiscReg(MISCREG_TCR_EL2); 124910037SARM gem5 Developers asid = -1; 125010037SARM gem5 Developers break; 125110037SARM gem5 Developers case EL3: 125210037SARM gem5 Developers sctlr = tc->readMiscReg(MISCREG_SCTLR_EL3); 125310037SARM gem5 Developers ttbcr = tc->readMiscReg(MISCREG_TCR_EL3); 125410037SARM gem5 Developers asid = -1; 125510037SARM gem5 Developers break; 125610037SARM gem5 Developers } 125710037SARM gem5 Developers scr = tc->readMiscReg(MISCREG_SCR_EL3); 125810037SARM gem5 Developers isPriv = aarch64EL != EL0; 125910037SARM gem5 Developers // @todo: modify this behaviour to support Virtualization in 126010037SARM gem5 Developers // AArch64 126110037SARM gem5 Developers vmid = 0; 126210037SARM gem5 Developers isHyp = false; 126310037SARM gem5 Developers directToStage2 = false; 126410037SARM gem5 Developers stage2Req = false; 126510037SARM gem5 Developers } else { // AArch32 126610037SARM gem5 Developers sctlr = tc->readMiscReg(flattenMiscRegNsBanked(MISCREG_SCTLR, tc, 126710037SARM gem5 Developers !isSecure)); 126810037SARM gem5 Developers ttbcr = tc->readMiscReg(flattenMiscRegNsBanked(MISCREG_TTBCR, tc, 126910037SARM gem5 Developers !isSecure)); 127010037SARM gem5 Developers scr = tc->readMiscReg(MISCREG_SCR); 127110037SARM gem5 Developers isPriv = cpsr.mode != MODE_USER; 127210037SARM gem5 Developers if (haveLPAE && ttbcr.eae) { 127310037SARM gem5 Developers // Long-descriptor translation table format in use 127410037SARM gem5 Developers uint64_t ttbr_asid = tc->readMiscReg( 127510037SARM gem5 Developers flattenMiscRegNsBanked(ttbcr.a1 ? MISCREG_TTBR1 127610037SARM gem5 Developers : MISCREG_TTBR0, 127710037SARM gem5 Developers tc, !isSecure)); 127810037SARM gem5 Developers asid = bits(ttbr_asid, 55, 48); 127910037SARM gem5 Developers } else { 128010037SARM gem5 Developers // Short-descriptor translation table format in use 128110037SARM gem5 Developers CONTEXTIDR context_id = tc->readMiscReg(flattenMiscRegNsBanked( 128210037SARM gem5 Developers MISCREG_CONTEXTIDR, tc,!isSecure)); 128310037SARM gem5 Developers asid = context_id.asid; 128410037SARM gem5 Developers } 128510037SARM gem5 Developers prrr = tc->readMiscReg(flattenMiscRegNsBanked(MISCREG_PRRR, tc, 128610037SARM gem5 Developers !isSecure)); 128710037SARM gem5 Developers nmrr = tc->readMiscReg(flattenMiscRegNsBanked(MISCREG_NMRR, tc, 128810037SARM gem5 Developers !isSecure)); 128910037SARM gem5 Developers dacr = tc->readMiscReg(flattenMiscRegNsBanked(MISCREG_DACR, tc, 129010037SARM gem5 Developers !isSecure)); 129110037SARM gem5 Developers hcr = tc->readMiscReg(MISCREG_HCR); 129210037SARM gem5 Developers 129310037SARM gem5 Developers if (haveVirtualization) { 129410037SARM gem5 Developers vmid = bits(tc->readMiscReg(MISCREG_VTTBR), 55, 48); 129510037SARM gem5 Developers isHyp = cpsr.mode == MODE_HYP; 129610037SARM gem5 Developers isHyp |= tranType & HypMode; 129710037SARM gem5 Developers isHyp &= (tranType & S1S2NsTran) == 0; 129810037SARM gem5 Developers isHyp &= (tranType & S1CTran) == 0; 129910037SARM gem5 Developers if (isHyp) { 130010037SARM gem5 Developers sctlr = tc->readMiscReg(MISCREG_HSCTLR); 130110037SARM gem5 Developers } 130210037SARM gem5 Developers // Work out if we should skip the first stage of translation and go 130310037SARM gem5 Developers // directly to stage 2. This value is cached so we don't have to 130410037SARM gem5 Developers // compute it for every translation. 130510037SARM gem5 Developers stage2Req = hcr.vm && !isStage2 && !isHyp && !isSecure && 130610037SARM gem5 Developers !(tranType & S1CTran); 130710037SARM gem5 Developers directToStage2 = stage2Req && !sctlr.m; 130810037SARM gem5 Developers } else { 130910037SARM gem5 Developers vmid = 0; 131010037SARM gem5 Developers stage2Req = false; 131110037SARM gem5 Developers isHyp = false; 131210037SARM gem5 Developers directToStage2 = false; 131310037SARM gem5 Developers } 131410037SARM gem5 Developers } 131510037SARM gem5 Developers miscRegValid = true; 131610037SARM gem5 Developers curTranType = tranType; 131710037SARM gem5 Developers} 131810037SARM gem5 Developers 131910037SARM gem5 DevelopersFault 132010037SARM gem5 DevelopersTLB::getTE(TlbEntry **te, RequestPtr req, ThreadContext *tc, Mode mode, 132110037SARM gem5 Developers Translation *translation, bool timing, bool functional, 132210037SARM gem5 Developers bool is_secure, TLB::ArmTranslationType tranType) 132310037SARM gem5 Developers{ 132410037SARM gem5 Developers bool is_fetch = (mode == Execute); 132510037SARM gem5 Developers bool is_write = (mode == Write); 132610037SARM gem5 Developers 132710037SARM gem5 Developers Addr vaddr_tainted = req->getVaddr(); 132810037SARM gem5 Developers Addr vaddr = 0; 132910037SARM gem5 Developers ExceptionLevel target_el = aarch64 ? aarch64EL : EL1; 133010037SARM gem5 Developers if (aarch64) { 133110854SNathanael.Premillieu@arm.com vaddr = purifyTaggedAddr(vaddr_tainted, tc, target_el, ttbcr); 133210037SARM gem5 Developers } else { 133310037SARM gem5 Developers vaddr = vaddr_tainted; 133410037SARM gem5 Developers } 133510037SARM gem5 Developers *te = lookup(vaddr, asid, vmid, isHyp, is_secure, false, false, target_el); 133610037SARM gem5 Developers if (*te == NULL) { 133710037SARM gem5 Developers if (req->isPrefetch()) { 133810037SARM gem5 Developers // if the request is a prefetch don't attempt to fill the TLB or go 133910037SARM gem5 Developers // any further with the memory access (here we can safely use the 134010037SARM gem5 Developers // fault status for the short desc. format in all cases) 13417734SAli.Saidi@ARM.com prefetchFaults++; 134210474Sandreas.hansson@arm.com return std::make_shared<PrefetchAbort>( 134310474Sandreas.hansson@arm.com vaddr_tainted, ArmFault::PrefetchTLBMiss, isStage2); 13447611SGene.Wu@arm.com } 13457734SAli.Saidi@ARM.com 13467734SAli.Saidi@ARM.com if (is_fetch) 13477734SAli.Saidi@ARM.com instMisses++; 13487734SAli.Saidi@ARM.com else if (is_write) 13497734SAli.Saidi@ARM.com writeMisses++; 13507734SAli.Saidi@ARM.com else 13517734SAli.Saidi@ARM.com readMisses++; 13527734SAli.Saidi@ARM.com 13537404SAli.Saidi@ARM.com // start translation table walk, pass variables rather than 13547404SAli.Saidi@ARM.com // re-retreaving in table walker for speed 135510037SARM gem5 Developers DPRINTF(TLB, "TLB Miss: Starting hardware table walker for %#x(%d:%d)\n", 135610037SARM gem5 Developers vaddr_tainted, asid, vmid); 135710037SARM gem5 Developers Fault fault; 135810037SARM gem5 Developers fault = tableWalker->walk(req, tc, asid, vmid, isHyp, mode, 135910037SARM gem5 Developers translation, timing, functional, is_secure, 136010037SARM gem5 Developers tranType); 136110037SARM gem5 Developers // for timing mode, return and wait for table walk, 136210037SARM gem5 Developers if (timing || fault != NoFault) { 13637437Sdam.sunwoo@arm.com return fault; 13647437Sdam.sunwoo@arm.com } 13657404SAli.Saidi@ARM.com 136610037SARM gem5 Developers *te = lookup(vaddr, asid, vmid, isHyp, is_secure, false, false, target_el); 136710037SARM gem5 Developers if (!*te) 13687404SAli.Saidi@ARM.com printTlb(); 136910037SARM gem5 Developers assert(*te); 13707734SAli.Saidi@ARM.com } else { 13717734SAli.Saidi@ARM.com if (is_fetch) 13727734SAli.Saidi@ARM.com instHits++; 13737734SAli.Saidi@ARM.com else if (is_write) 13747734SAli.Saidi@ARM.com writeHits++; 13757734SAli.Saidi@ARM.com else 13767734SAli.Saidi@ARM.com readHits++; 13777404SAli.Saidi@ARM.com } 13786757SAli.Saidi@ARM.com return NoFault; 13797404SAli.Saidi@ARM.com} 13806757SAli.Saidi@ARM.com 13817404SAli.Saidi@ARM.comFault 138210037SARM gem5 DevelopersTLB::getResultTe(TlbEntry **te, RequestPtr req, ThreadContext *tc, Mode mode, 138310037SARM gem5 Developers Translation *translation, bool timing, bool functional, 138410037SARM gem5 Developers TlbEntry *mergeTe) 13857404SAli.Saidi@ARM.com{ 13867404SAli.Saidi@ARM.com Fault fault; 138710037SARM gem5 Developers TlbEntry *s1Te = NULL; 138810037SARM gem5 Developers 138910037SARM gem5 Developers Addr vaddr_tainted = req->getVaddr(); 139010037SARM gem5 Developers 139110037SARM gem5 Developers // Get the stage 1 table entry 139210037SARM gem5 Developers fault = getTE(&s1Te, req, tc, mode, translation, timing, functional, 139310037SARM gem5 Developers isSecure, curTranType); 139410037SARM gem5 Developers // only proceed if we have a valid table entry 139510037SARM gem5 Developers if ((s1Te != NULL) && (fault == NoFault)) { 139610037SARM gem5 Developers // Check stage 1 permissions before checking stage 2 139710037SARM gem5 Developers if (aarch64) 139810037SARM gem5 Developers fault = checkPermissions64(s1Te, req, mode, tc); 139910037SARM gem5 Developers else 140010037SARM gem5 Developers fault = checkPermissions(s1Te, req, mode); 140110037SARM gem5 Developers if (stage2Req & (fault == NoFault)) { 140210037SARM gem5 Developers Stage2LookUp *s2Lookup = new Stage2LookUp(this, stage2Tlb, *s1Te, 140310037SARM gem5 Developers req, translation, mode, timing, functional, curTranType); 140410037SARM gem5 Developers fault = s2Lookup->getTe(tc, mergeTe); 140510037SARM gem5 Developers if (s2Lookup->isComplete()) { 140610037SARM gem5 Developers *te = mergeTe; 140710037SARM gem5 Developers // We've finished with the lookup so delete it 140810037SARM gem5 Developers delete s2Lookup; 140910037SARM gem5 Developers } else { 141010037SARM gem5 Developers // The lookup hasn't completed, so we can't delete it now. We 141110037SARM gem5 Developers // get round this by asking the object to self delete when the 141210037SARM gem5 Developers // translation is complete. 141310037SARM gem5 Developers s2Lookup->setSelfDelete(); 141410037SARM gem5 Developers } 141510037SARM gem5 Developers } else { 141610037SARM gem5 Developers // This case deals with an S1 hit (or bypass), followed by 141710037SARM gem5 Developers // an S2 hit-but-perms issue 141810037SARM gem5 Developers if (isStage2) { 141910037SARM gem5 Developers DPRINTF(TLBVerbose, "s2TLB: reqVa %#x, reqPa %#x, fault %p\n", 142010037SARM gem5 Developers vaddr_tainted, req->hasPaddr() ? req->getPaddr() : ~0, fault); 142110037SARM gem5 Developers if (fault != NoFault) { 142210037SARM gem5 Developers ArmFault *armFault = reinterpret_cast<ArmFault *>(fault.get()); 142310037SARM gem5 Developers armFault->annotate(ArmFault::S1PTW, false); 142410037SARM gem5 Developers armFault->annotate(ArmFault::OVA, vaddr_tainted); 142510037SARM gem5 Developers } 142610037SARM gem5 Developers } 142710037SARM gem5 Developers *te = s1Te; 142810037SARM gem5 Developers } 142910037SARM gem5 Developers } 14307404SAli.Saidi@ARM.com return fault; 14316019Shines@cs.fsu.edu} 14326019Shines@cs.fsu.edu 14336116Snate@binkert.orgArmISA::TLB * 14346116Snate@binkert.orgArmTLBParams::create() 14356019Shines@cs.fsu.edu{ 14366116Snate@binkert.org return new ArmISA::TLB(this); 14376019Shines@cs.fsu.edu} 1438