tlb.cc revision 6038
14997Sgblack@eecs.umich.edu/* 25268Sksewell@umich.edu * Copyright (c) 2001-2005 The Regents of The University of Michigan 35254Sksewell@umich.edu * Copyright (c) 2007 MIPS Technologies, Inc. 45254Sksewell@umich.edu * All rights reserved. 54997Sgblack@eecs.umich.edu * 65254Sksewell@umich.edu * Redistribution and use in source and binary forms, with or without 75254Sksewell@umich.edu * modification, are permitted provided that the following conditions are 85254Sksewell@umich.edu * met: redistributions of source code must retain the above copyright 95254Sksewell@umich.edu * notice, this list of conditions and the following disclaimer; 105254Sksewell@umich.edu * redistributions in binary form must reproduce the above copyright 115254Sksewell@umich.edu * notice, this list of conditions and the following disclaimer in the 125254Sksewell@umich.edu * documentation and/or other materials provided with the distribution; 135254Sksewell@umich.edu * neither the name of the copyright holders nor the names of its 145254Sksewell@umich.edu * contributors may be used to endorse or promote products derived from 155254Sksewell@umich.edu * this software without specific prior written permission. 164997Sgblack@eecs.umich.edu * 175254Sksewell@umich.edu * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 185254Sksewell@umich.edu * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 195254Sksewell@umich.edu * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 205254Sksewell@umich.edu * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 215254Sksewell@umich.edu * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 225254Sksewell@umich.edu * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 235254Sksewell@umich.edu * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 245254Sksewell@umich.edu * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 255254Sksewell@umich.edu * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 265254Sksewell@umich.edu * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 275254Sksewell@umich.edu * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 284997Sgblack@eecs.umich.edu * 295268Sksewell@umich.edu * Authors: Nathan Binkert 305268Sksewell@umich.edu * Steve Reinhardt 315268Sksewell@umich.edu * Jaidev Patwardhan 324997Sgblack@eecs.umich.edu */ 334997Sgblack@eecs.umich.edu 345222Sksewell@umich.edu#include <string> 355222Sksewell@umich.edu#include <vector> 364997Sgblack@eecs.umich.edu 375222Sksewell@umich.edu#include "arch/mips/pra_constants.hh" 385222Sksewell@umich.edu#include "arch/mips/pagetable.hh" 394997Sgblack@eecs.umich.edu#include "arch/mips/tlb.hh" 405222Sksewell@umich.edu#include "arch/mips/faults.hh" 415222Sksewell@umich.edu#include "arch/mips/utility.hh" 425222Sksewell@umich.edu#include "base/inifile.hh" 435222Sksewell@umich.edu#include "base/str.hh" 445222Sksewell@umich.edu#include "base/trace.hh" 455222Sksewell@umich.edu#include "cpu/thread_context.hh" 465224Sksewell@umich.edu#include "sim/process.hh" 475224Sksewell@umich.edu#include "mem/page_table.hh" 485222Sksewell@umich.edu#include "params/MipsTLB.hh" 494997Sgblack@eecs.umich.edu 505019Sgblack@eecs.umich.edu 515222Sksewell@umich.eduusing namespace std; 525222Sksewell@umich.eduusing namespace MipsISA; 535019Sgblack@eecs.umich.edu 545222Sksewell@umich.edu/////////////////////////////////////////////////////////////////////// 555222Sksewell@umich.edu// 565222Sksewell@umich.edu// MIPS TLB 575222Sksewell@umich.edu// 585019Sgblack@eecs.umich.edu 595543Ssaidi@eecs.umich.edu#define MODE2MASK(X) (1 << (X)) 605222Sksewell@umich.edu 615222Sksewell@umich.eduTLB::TLB(const Params *p) 625358Sgblack@eecs.umich.edu : BaseTLB(p), size(p->size), nlu(0) 635222Sksewell@umich.edu{ 645222Sksewell@umich.edu table = new MipsISA::PTE[size]; 655222Sksewell@umich.edu memset(table, 0, sizeof(MipsISA::PTE[size])); 665222Sksewell@umich.edu smallPages=0; 675222Sksewell@umich.edu} 685222Sksewell@umich.edu 695222Sksewell@umich.eduTLB::~TLB() 705222Sksewell@umich.edu{ 715222Sksewell@umich.edu if (table) 725222Sksewell@umich.edu delete [] table; 735222Sksewell@umich.edu} 745222Sksewell@umich.edu 755222Sksewell@umich.edu// look up an entry in the TLB 765222Sksewell@umich.eduMipsISA::PTE * 775222Sksewell@umich.eduTLB::lookup(Addr vpn, uint8_t asn) const 785222Sksewell@umich.edu{ 795222Sksewell@umich.edu // assume not found... 805222Sksewell@umich.edu MipsISA::PTE *retval = NULL; 815222Sksewell@umich.edu PageTable::const_iterator i = lookupTable.find(vpn); 825222Sksewell@umich.edu if (i != lookupTable.end()) { 835222Sksewell@umich.edu while (i->first == vpn) { 845222Sksewell@umich.edu int index = i->second; 855222Sksewell@umich.edu MipsISA::PTE *pte = &table[index]; 865222Sksewell@umich.edu 875222Sksewell@umich.edu /* 1KB TLB Lookup code - from MIPS ARM Volume III - Rev. 2.50 */ 885222Sksewell@umich.edu Addr Mask = pte->Mask; 895222Sksewell@umich.edu Addr InvMask = ~Mask; 905222Sksewell@umich.edu Addr VPN = pte->VPN; 915543Ssaidi@eecs.umich.edu // warn("Valid: %d - %d\n",pte->V0,pte->V1); 925222Sksewell@umich.edu if(((vpn & InvMask) == (VPN & InvMask)) && (pte->G || (asn == pte->asid))) 935222Sksewell@umich.edu { // We have a VPN + ASID Match 945222Sksewell@umich.edu retval = pte; 955222Sksewell@umich.edu break; 965222Sksewell@umich.edu } 975222Sksewell@umich.edu ++i; 985222Sksewell@umich.edu } 995019Sgblack@eecs.umich.edu } 1005019Sgblack@eecs.umich.edu 1015222Sksewell@umich.edu DPRINTF(TLB, "lookup %#x, asn %#x -> %s ppn %#x\n", vpn, (int)asn, 1025222Sksewell@umich.edu retval ? "hit" : "miss", retval ? retval->PFN1 : 0); 1035222Sksewell@umich.edu return retval; 1045222Sksewell@umich.edu} 1055222Sksewell@umich.edu 1065222Sksewell@umich.eduMipsISA::PTE* TLB::getEntry(unsigned Index) const 1075222Sksewell@umich.edu{ 1085222Sksewell@umich.edu // Make sure that Index is valid 1095222Sksewell@umich.edu assert(Index<size); 1105222Sksewell@umich.edu return &table[Index]; 1115222Sksewell@umich.edu} 1125222Sksewell@umich.edu 1135222Sksewell@umich.eduint TLB::probeEntry(Addr vpn,uint8_t asn) const 1145222Sksewell@umich.edu{ 1155222Sksewell@umich.edu // assume not found... 1165222Sksewell@umich.edu MipsISA::PTE *retval = NULL; 1175222Sksewell@umich.edu int Ind=-1; 1185222Sksewell@umich.edu PageTable::const_iterator i = lookupTable.find(vpn); 1195222Sksewell@umich.edu if (i != lookupTable.end()) { 1205222Sksewell@umich.edu while (i->first == vpn) { 1215222Sksewell@umich.edu int index = i->second; 1225222Sksewell@umich.edu MipsISA::PTE *pte = &table[index]; 1235222Sksewell@umich.edu 1245222Sksewell@umich.edu /* 1KB TLB Lookup code - from MIPS ARM Volume III - Rev. 2.50 */ 1255222Sksewell@umich.edu Addr Mask = pte->Mask; 1265222Sksewell@umich.edu Addr InvMask = ~Mask; 1275222Sksewell@umich.edu Addr VPN = pte->VPN; 1285222Sksewell@umich.edu if(((vpn & InvMask) == (VPN & InvMask)) && (pte->G || (asn == pte->asid))) 1295222Sksewell@umich.edu { // We have a VPN + ASID Match 1305222Sksewell@umich.edu retval = pte; 1315222Sksewell@umich.edu Ind = index; 1325222Sksewell@umich.edu break; 1335222Sksewell@umich.edu } 1345222Sksewell@umich.edu 1355222Sksewell@umich.edu ++i; 1365222Sksewell@umich.edu } 1375222Sksewell@umich.edu } 1385222Sksewell@umich.edu DPRINTF(MipsPRA,"VPN: %x, asid: %d, Result of TLBP: %d\n",vpn,asn,Ind); 1395222Sksewell@umich.edu return Ind; 1405222Sksewell@umich.edu} 1415222Sksewell@umich.eduFault inline 1425222Sksewell@umich.eduTLB::checkCacheability(RequestPtr &req) 1435222Sksewell@umich.edu{ 1445222Sksewell@umich.edu Addr VAddrUncacheable = 0xA0000000; 1455222Sksewell@umich.edu // In MIPS, cacheability is controlled by certain bits of the virtual address 1465222Sksewell@umich.edu // or by the TLB entry 1475222Sksewell@umich.edu if((req->getVaddr() & VAddrUncacheable) == VAddrUncacheable) { 1485222Sksewell@umich.edu // mark request as uncacheable 1495736Snate@binkert.org req->setFlags(Request::UNCACHEABLE); 1505222Sksewell@umich.edu } 1515222Sksewell@umich.edu return NoFault; 1525222Sksewell@umich.edu} 1535222Sksewell@umich.eduvoid TLB::insertAt(MipsISA::PTE &pte, unsigned Index, int _smallPages) 1545222Sksewell@umich.edu{ 1555222Sksewell@umich.edu smallPages=_smallPages; 1565222Sksewell@umich.edu if(Index > size){ 1575222Sksewell@umich.edu warn("Attempted to write at index (%d) beyond TLB size (%d)",Index,size); 1585222Sksewell@umich.edu } else { 1595222Sksewell@umich.edu // Update TLB 1605222Sksewell@umich.edu DPRINTF(TLB,"TLB[%d]: %x %x %x %x\n",Index,pte.Mask<<11,((pte.VPN << 11) | pte.asid),((pte.PFN0 <<6) | (pte.C0 << 3) | (pte.D0 << 2) | (pte.V0 <<1) | pte.G), 1615222Sksewell@umich.edu ((pte.PFN1 <<6) | (pte.C1 << 3) | (pte.D1 << 2) | (pte.V1 <<1) | pte.G)); 1625222Sksewell@umich.edu if(table[Index].V0 == true || table[Index].V1 == true){ // Previous entry is valid 1635222Sksewell@umich.edu PageTable::iterator i = lookupTable.find(table[Index].VPN); 1645222Sksewell@umich.edu lookupTable.erase(i); 1655222Sksewell@umich.edu } 1665222Sksewell@umich.edu table[Index]=pte; 1675222Sksewell@umich.edu // Update fast lookup table 1685222Sksewell@umich.edu lookupTable.insert(make_pair(table[Index].VPN, Index)); 1695222Sksewell@umich.edu // int TestIndex=probeEntry(pte.VPN,pte.asid); 1705222Sksewell@umich.edu // warn("Inserted at: %d, Found at: %d (%x)\n",Index,TestIndex,pte.Mask); 1715222Sksewell@umich.edu } 1725222Sksewell@umich.edu 1735222Sksewell@umich.edu} 1745222Sksewell@umich.edu 1755222Sksewell@umich.edu// insert a new TLB entry 1765222Sksewell@umich.eduvoid 1775222Sksewell@umich.eduTLB::insert(Addr addr, MipsISA::PTE &pte) 1785222Sksewell@umich.edu{ 1795222Sksewell@umich.edu fatal("TLB Insert not yet implemented\n"); 1805222Sksewell@umich.edu 1815222Sksewell@umich.edu 1825222Sksewell@umich.edu /* MipsISA::VAddr vaddr = addr; 1835222Sksewell@umich.edu if (table[nlu].valid) { 1845222Sksewell@umich.edu Addr oldvpn = table[nlu].tag; 1855222Sksewell@umich.edu PageTable::iterator i = lookupTable.find(oldvpn); 1865222Sksewell@umich.edu 1875222Sksewell@umich.edu if (i == lookupTable.end()) 1885222Sksewell@umich.edu panic("TLB entry not found in lookupTable"); 1895222Sksewell@umich.edu 1905222Sksewell@umich.edu int index; 1915222Sksewell@umich.edu while ((index = i->second) != nlu) { 1925222Sksewell@umich.edu if (table[index].tag != oldvpn) 1935222Sksewell@umich.edu panic("TLB entry not found in lookupTable"); 1945222Sksewell@umich.edu 1955222Sksewell@umich.edu ++i; 1965222Sksewell@umich.edu } 1975222Sksewell@umich.edu 1985222Sksewell@umich.edu DPRINTF(TLB, "remove @%d: %#x -> %#x\n", nlu, oldvpn, table[nlu].ppn); 1995222Sksewell@umich.edu 2005222Sksewell@umich.edu lookupTable.erase(i); 2015014Sgblack@eecs.umich.edu } 2025014Sgblack@eecs.umich.edu 2035222Sksewell@umich.edu DPRINTF(TLB, "insert @%d: %#x -> %#x\n", nlu, vaddr.vpn(), pte.ppn); 2045222Sksewell@umich.edu 2055222Sksewell@umich.edu table[nlu] = pte; 2065222Sksewell@umich.edu table[nlu].tag = vaddr.vpn(); 2075222Sksewell@umich.edu table[nlu].valid = true; 2085222Sksewell@umich.edu 2095222Sksewell@umich.edu lookupTable.insert(make_pair(vaddr.vpn(), nlu)); 2105222Sksewell@umich.edu nextnlu(); 2115222Sksewell@umich.edu */ 2125222Sksewell@umich.edu} 2135222Sksewell@umich.edu 2145222Sksewell@umich.eduvoid 2155222Sksewell@umich.eduTLB::flushAll() 2165222Sksewell@umich.edu{ 2175222Sksewell@umich.edu DPRINTF(TLB, "flushAll\n"); 2185222Sksewell@umich.edu memset(table, 0, sizeof(MipsISA::PTE[size])); 2195222Sksewell@umich.edu lookupTable.clear(); 2205222Sksewell@umich.edu nlu = 0; 2215222Sksewell@umich.edu} 2225222Sksewell@umich.edu 2235222Sksewell@umich.eduvoid 2245222Sksewell@umich.eduTLB::serialize(ostream &os) 2255222Sksewell@umich.edu{ 2265222Sksewell@umich.edu SERIALIZE_SCALAR(size); 2275222Sksewell@umich.edu SERIALIZE_SCALAR(nlu); 2285222Sksewell@umich.edu 2295222Sksewell@umich.edu for (int i = 0; i < size; i++) { 2305222Sksewell@umich.edu nameOut(os, csprintf("%s.PTE%d", name(), i)); 2315222Sksewell@umich.edu table[i].serialize(os); 2325222Sksewell@umich.edu } 2335222Sksewell@umich.edu} 2345222Sksewell@umich.edu 2355222Sksewell@umich.eduvoid 2365222Sksewell@umich.eduTLB::unserialize(Checkpoint *cp, const string §ion) 2375222Sksewell@umich.edu{ 2385222Sksewell@umich.edu UNSERIALIZE_SCALAR(size); 2395222Sksewell@umich.edu UNSERIALIZE_SCALAR(nlu); 2405222Sksewell@umich.edu 2415222Sksewell@umich.edu for (int i = 0; i < size; i++) { 2425222Sksewell@umich.edu table[i].unserialize(cp, csprintf("%s.PTE%d", section, i)); 2435222Sksewell@umich.edu if (table[i].V0 || table[i].V1) { 2445222Sksewell@umich.edu lookupTable.insert(make_pair(table[i].VPN, i)); 2455222Sksewell@umich.edu } 2465222Sksewell@umich.edu } 2475222Sksewell@umich.edu} 2485222Sksewell@umich.edu 2495222Sksewell@umich.eduvoid 2505222Sksewell@umich.eduTLB::regStats() 2515222Sksewell@umich.edu{ 2525222Sksewell@umich.edu read_hits 2535222Sksewell@umich.edu .name(name() + ".read_hits") 2545222Sksewell@umich.edu .desc("DTB read hits") 2555222Sksewell@umich.edu ; 2565222Sksewell@umich.edu 2575222Sksewell@umich.edu read_misses 2585222Sksewell@umich.edu .name(name() + ".read_misses") 2595222Sksewell@umich.edu .desc("DTB read misses") 2605222Sksewell@umich.edu ; 2615222Sksewell@umich.edu 2625222Sksewell@umich.edu 2635222Sksewell@umich.edu read_accesses 2645222Sksewell@umich.edu .name(name() + ".read_accesses") 2655222Sksewell@umich.edu .desc("DTB read accesses") 2665222Sksewell@umich.edu ; 2675222Sksewell@umich.edu 2685222Sksewell@umich.edu write_hits 2695222Sksewell@umich.edu .name(name() + ".write_hits") 2705222Sksewell@umich.edu .desc("DTB write hits") 2715222Sksewell@umich.edu ; 2725222Sksewell@umich.edu 2735222Sksewell@umich.edu write_misses 2745222Sksewell@umich.edu .name(name() + ".write_misses") 2755222Sksewell@umich.edu .desc("DTB write misses") 2765222Sksewell@umich.edu ; 2775222Sksewell@umich.edu 2785222Sksewell@umich.edu 2795222Sksewell@umich.edu write_accesses 2805222Sksewell@umich.edu .name(name() + ".write_accesses") 2815222Sksewell@umich.edu .desc("DTB write accesses") 2825222Sksewell@umich.edu ; 2835222Sksewell@umich.edu 2845222Sksewell@umich.edu hits 2855222Sksewell@umich.edu .name(name() + ".hits") 2865222Sksewell@umich.edu .desc("DTB hits") 2875222Sksewell@umich.edu ; 2885222Sksewell@umich.edu 2895222Sksewell@umich.edu misses 2905222Sksewell@umich.edu .name(name() + ".misses") 2915222Sksewell@umich.edu .desc("DTB misses") 2925222Sksewell@umich.edu ; 2935222Sksewell@umich.edu 2945222Sksewell@umich.edu invalids 2955222Sksewell@umich.edu .name(name() + ".invalids") 2965222Sksewell@umich.edu .desc("DTB access violations") 2975222Sksewell@umich.edu ; 2985222Sksewell@umich.edu 2995222Sksewell@umich.edu accesses 3005222Sksewell@umich.edu .name(name() + ".accesses") 3015222Sksewell@umich.edu .desc("DTB accesses") 3025222Sksewell@umich.edu ; 3035222Sksewell@umich.edu 3045222Sksewell@umich.edu hits = read_hits + write_hits; 3055222Sksewell@umich.edu misses = read_misses + write_misses; 3065222Sksewell@umich.edu accesses = read_accesses + write_accesses; 3075222Sksewell@umich.edu} 3085222Sksewell@umich.edu 3095222Sksewell@umich.eduFault 3106022Sgblack@eecs.umich.eduTLB::translateInst(RequestPtr req, ThreadContext *tc) 3115222Sksewell@umich.edu{ 3125224Sksewell@umich.edu#if !FULL_SYSTEM 3135224Sksewell@umich.edu Process * p = tc->getProcessPtr(); 3145224Sksewell@umich.edu 3155224Sksewell@umich.edu Fault fault = p->pTable->translate(req); 3165224Sksewell@umich.edu if(fault != NoFault) 3175224Sksewell@umich.edu return fault; 3185224Sksewell@umich.edu 3195224Sksewell@umich.edu return NoFault; 3205224Sksewell@umich.edu#else 3215222Sksewell@umich.edu if(MipsISA::IsKSeg0(req->getVaddr())) 3225014Sgblack@eecs.umich.edu { 3235222Sksewell@umich.edu // Address will not be translated through TLB, set response, and go! 3245222Sksewell@umich.edu req->setPaddr(MipsISA::KSeg02Phys(req->getVaddr())); 3255222Sksewell@umich.edu if(MipsISA::getOperatingMode(tc->readMiscReg(MipsISA::Status)) != mode_kernel || req->isMisaligned()) 3265222Sksewell@umich.edu { 3275222Sksewell@umich.edu AddressErrorFault *Flt = new AddressErrorFault(); 3285222Sksewell@umich.edu /* BadVAddr must be set */ 3295222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 3305222Sksewell@umich.edu return Flt; 3315222Sksewell@umich.edu } 3325014Sgblack@eecs.umich.edu } 3335222Sksewell@umich.edu else if(MipsISA::IsKSeg1(req->getVaddr())) 3345222Sksewell@umich.edu { 3355222Sksewell@umich.edu // Address will not be translated through TLB, set response, and go! 3365222Sksewell@umich.edu req->setPaddr(MipsISA::KSeg02Phys(req->getVaddr())); 3375222Sksewell@umich.edu } 3385222Sksewell@umich.edu else 3395222Sksewell@umich.edu { 3405222Sksewell@umich.edu /* This is an optimization - smallPages is updated every time a TLB operation is performed 3415222Sksewell@umich.edu That way, we don't need to look at Config3 _ SP and PageGrain _ ESP every time we 3425222Sksewell@umich.edu do a TLB lookup */ 3435222Sksewell@umich.edu Addr VPN; 3445222Sksewell@umich.edu if(smallPages==1){ 3455222Sksewell@umich.edu VPN=((req->getVaddr() >> 11)); 3465222Sksewell@umich.edu } else { 3475222Sksewell@umich.edu VPN=((req->getVaddr() >> 11) & 0xFFFFFFFC); 3485222Sksewell@umich.edu } 3495222Sksewell@umich.edu uint8_t Asid = req->getAsid(); 3505222Sksewell@umich.edu if(req->isMisaligned()){ // Unaligned address! 3515222Sksewell@umich.edu AddressErrorFault *Flt = new AddressErrorFault(); 3525222Sksewell@umich.edu /* BadVAddr must be set */ 3535222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 3545222Sksewell@umich.edu return Flt; 3555222Sksewell@umich.edu } 3565222Sksewell@umich.edu MipsISA::PTE *pte = lookup(VPN,Asid); 3575222Sksewell@umich.edu if(pte != NULL) 3585222Sksewell@umich.edu {// Ok, found something 3595222Sksewell@umich.edu /* Check for valid bits */ 3605222Sksewell@umich.edu int EvenOdd; 3615222Sksewell@umich.edu bool Valid; 3625222Sksewell@umich.edu if((((req->getVaddr()) >> pte->AddrShiftAmount) & 1) ==0){ 3635222Sksewell@umich.edu // Check even bits 3645222Sksewell@umich.edu Valid = pte->V0; 3655222Sksewell@umich.edu EvenOdd = 0; 3665222Sksewell@umich.edu } else { 3675222Sksewell@umich.edu // Check odd bits 3685222Sksewell@umich.edu Valid = pte->V1; 3695222Sksewell@umich.edu EvenOdd = 1; 3705222Sksewell@umich.edu } 3715222Sksewell@umich.edu 3725222Sksewell@umich.edu if(Valid == false) 3735222Sksewell@umich.edu {//Invalid entry 3745222Sksewell@umich.edu ItbInvalidFault *Flt = new ItbInvalidFault(); 3755222Sksewell@umich.edu /* EntryHi VPN, ASID fields must be set */ 3765222Sksewell@umich.edu Flt->EntryHi_Asid = Asid; 3775222Sksewell@umich.edu Flt->EntryHi_VPN2 = (VPN>>2); 3785222Sksewell@umich.edu Flt->EntryHi_VPN2X = (VPN & 0x3); 3795222Sksewell@umich.edu 3805222Sksewell@umich.edu /* BadVAddr must be set */ 3815222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 3825222Sksewell@umich.edu 3835222Sksewell@umich.edu /* Context must be set */ 3845222Sksewell@umich.edu Flt->Context_BadVPN2 = (VPN >> 2); 3855222Sksewell@umich.edu return Flt; 3865222Sksewell@umich.edu } 3875222Sksewell@umich.edu else 3885222Sksewell@umich.edu {// Ok, this is really a match, set paddr 3895543Ssaidi@eecs.umich.edu // hits++; 3905222Sksewell@umich.edu Addr PAddr; 3915222Sksewell@umich.edu if(EvenOdd == 0){ 3925222Sksewell@umich.edu PAddr = pte->PFN0; 3935222Sksewell@umich.edu }else{ 3945222Sksewell@umich.edu PAddr = pte->PFN1; 3955222Sksewell@umich.edu } 3965222Sksewell@umich.edu PAddr >>= (pte->AddrShiftAmount-12); 3975222Sksewell@umich.edu PAddr <<= pte->AddrShiftAmount; 3985222Sksewell@umich.edu PAddr |= ((req->getVaddr()) & pte->OffsetMask); 3995222Sksewell@umich.edu req->setPaddr(PAddr); 4005222Sksewell@umich.edu 4015222Sksewell@umich.edu 4025222Sksewell@umich.edu } 4035222Sksewell@umich.edu } 4045222Sksewell@umich.edu else 4055222Sksewell@umich.edu { // Didn't find any match, return a TLB Refill Exception 4065543Ssaidi@eecs.umich.edu // misses++; 4075222Sksewell@umich.edu ItbRefillFault *Flt=new ItbRefillFault(); 4085222Sksewell@umich.edu /* EntryHi VPN, ASID fields must be set */ 4095222Sksewell@umich.edu Flt->EntryHi_Asid = Asid; 4105222Sksewell@umich.edu Flt->EntryHi_VPN2 = (VPN>>2); 4115222Sksewell@umich.edu Flt->EntryHi_VPN2X = (VPN & 0x3); 4125222Sksewell@umich.edu 4135222Sksewell@umich.edu 4145222Sksewell@umich.edu /* BadVAddr must be set */ 4155222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 4165222Sksewell@umich.edu 4175222Sksewell@umich.edu /* Context must be set */ 4185222Sksewell@umich.edu Flt->Context_BadVPN2 = (VPN >> 2); 4195222Sksewell@umich.edu return Flt; 4205222Sksewell@umich.edu } 4215222Sksewell@umich.edu } 4225222Sksewell@umich.edu return checkCacheability(req); 4235224Sksewell@umich.edu#endif 4245222Sksewell@umich.edu} 4255222Sksewell@umich.edu 4265222Sksewell@umich.eduFault 4276022Sgblack@eecs.umich.eduTLB::translateData(RequestPtr req, ThreadContext *tc, bool write) 4285222Sksewell@umich.edu{ 4295224Sksewell@umich.edu#if !FULL_SYSTEM 4306038Sksewell@umich.edu //@TODO: This should actually use TLB instead of going directly 4316038Sksewell@umich.edu // to the page table in syscall mode. 4326038Sksewell@umich.edu /** 4336038Sksewell@umich.edu * Check for alignment faults 4346038Sksewell@umich.edu */ 4356038Sksewell@umich.edu if (req->getVaddr() & (req->getSize() - 1)) { 4366038Sksewell@umich.edu DPRINTF(TLB, "Alignment Fault on %#x, size = %d", req->getVaddr(), 4376038Sksewell@umich.edu req->getSize()); 4386038Sksewell@umich.edu return new AlignmentFault(); 4396038Sksewell@umich.edu } 4406038Sksewell@umich.edu 4416038Sksewell@umich.edu 4425224Sksewell@umich.edu Process * p = tc->getProcessPtr(); 4435224Sksewell@umich.edu 4445224Sksewell@umich.edu Fault fault = p->pTable->translate(req); 4455224Sksewell@umich.edu if(fault != NoFault) 4465224Sksewell@umich.edu return fault; 4475224Sksewell@umich.edu 4485224Sksewell@umich.edu return NoFault; 4495224Sksewell@umich.edu#else 4505222Sksewell@umich.edu if(MipsISA::IsKSeg0(req->getVaddr())) 4515222Sksewell@umich.edu { 4525222Sksewell@umich.edu // Address will not be translated through TLB, set response, and go! 4535222Sksewell@umich.edu req->setPaddr(MipsISA::KSeg02Phys(req->getVaddr())); 4545222Sksewell@umich.edu if(MipsISA::getOperatingMode(tc->readMiscReg(MipsISA::Status)) != mode_kernel || req->isMisaligned()) 4555222Sksewell@umich.edu { 4565222Sksewell@umich.edu StoreAddressErrorFault *Flt = new StoreAddressErrorFault(); 4575222Sksewell@umich.edu /* BadVAddr must be set */ 4585222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 4595222Sksewell@umich.edu 4605222Sksewell@umich.edu return Flt; 4615222Sksewell@umich.edu } 4625222Sksewell@umich.edu } 4635222Sksewell@umich.edu else if(MipsISA::IsKSeg1(req->getVaddr())) 4645222Sksewell@umich.edu { 4655222Sksewell@umich.edu // Address will not be translated through TLB, set response, and go! 4665222Sksewell@umich.edu req->setPaddr(MipsISA::KSeg02Phys(req->getVaddr())); 4675222Sksewell@umich.edu } 4685222Sksewell@umich.edu else 4695222Sksewell@umich.edu { 4705222Sksewell@umich.edu /* This is an optimization - smallPages is updated every time a TLB operation is performed 4715222Sksewell@umich.edu That way, we don't need to look at Config3 _ SP and PageGrain _ ESP every time we 4725222Sksewell@umich.edu do a TLB lookup */ 4735222Sksewell@umich.edu Addr VPN=((req->getVaddr() >> 11) & 0xFFFFFFFC); 4745222Sksewell@umich.edu if(smallPages==1){ 4755222Sksewell@umich.edu VPN=((req->getVaddr() >> 11)); 4765222Sksewell@umich.edu } 4775222Sksewell@umich.edu uint8_t Asid = req->getAsid(); 4785222Sksewell@umich.edu MipsISA::PTE *pte = lookup(VPN,Asid); 4795222Sksewell@umich.edu if(req->isMisaligned()){ // Unaligned address! 4805222Sksewell@umich.edu StoreAddressErrorFault *Flt = new StoreAddressErrorFault(); 4815222Sksewell@umich.edu /* BadVAddr must be set */ 4825222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 4835222Sksewell@umich.edu return Flt; 4845222Sksewell@umich.edu } 4855222Sksewell@umich.edu if(pte != NULL) 4865222Sksewell@umich.edu {// Ok, found something 4875222Sksewell@umich.edu /* Check for valid bits */ 4885222Sksewell@umich.edu int EvenOdd; 4895222Sksewell@umich.edu bool Valid; 4905222Sksewell@umich.edu bool Dirty; 4915222Sksewell@umich.edu if(((((req->getVaddr()) >> pte->AddrShiftAmount) & 1)) ==0){ 4925222Sksewell@umich.edu // Check even bits 4935222Sksewell@umich.edu Valid = pte->V0; 4945222Sksewell@umich.edu Dirty = pte->D0; 4955222Sksewell@umich.edu EvenOdd = 0; 4965222Sksewell@umich.edu 4975222Sksewell@umich.edu } else { 4985222Sksewell@umich.edu // Check odd bits 4995222Sksewell@umich.edu Valid = pte->V1; 5005222Sksewell@umich.edu Dirty = pte->D1; 5015222Sksewell@umich.edu EvenOdd = 1; 5025222Sksewell@umich.edu } 5035222Sksewell@umich.edu 5045222Sksewell@umich.edu if(Valid == false) 5055222Sksewell@umich.edu {//Invalid entry 5065543Ssaidi@eecs.umich.edu // invalids++; 5075222Sksewell@umich.edu DtbInvalidFault *Flt = new DtbInvalidFault(); 5085222Sksewell@umich.edu /* EntryHi VPN, ASID fields must be set */ 5095222Sksewell@umich.edu Flt->EntryHi_Asid = Asid; 5105222Sksewell@umich.edu Flt->EntryHi_VPN2 = (VPN>>2); 5115222Sksewell@umich.edu Flt->EntryHi_VPN2X = (VPN & 0x3); 5125222Sksewell@umich.edu 5135222Sksewell@umich.edu 5145222Sksewell@umich.edu /* BadVAddr must be set */ 5155222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 5165222Sksewell@umich.edu 5175222Sksewell@umich.edu /* Context must be set */ 5185222Sksewell@umich.edu Flt->Context_BadVPN2 = (VPN >> 2); 5195222Sksewell@umich.edu 5205222Sksewell@umich.edu return Flt; 5215222Sksewell@umich.edu } 5225222Sksewell@umich.edu else 5235222Sksewell@umich.edu {// Ok, this is really a match, set paddr 5245543Ssaidi@eecs.umich.edu // hits++; 5255222Sksewell@umich.edu if(!Dirty) 5265222Sksewell@umich.edu { 5275222Sksewell@umich.edu TLBModifiedFault *Flt = new TLBModifiedFault(); 5285222Sksewell@umich.edu /* EntryHi VPN, ASID fields must be set */ 5295222Sksewell@umich.edu Flt->EntryHi_Asid = Asid; 5305222Sksewell@umich.edu Flt->EntryHi_VPN2 = (VPN>>2); 5315222Sksewell@umich.edu Flt->EntryHi_VPN2X = (VPN & 0x3); 5325222Sksewell@umich.edu 5335222Sksewell@umich.edu 5345222Sksewell@umich.edu /* BadVAddr must be set */ 5355222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 5365222Sksewell@umich.edu 5375222Sksewell@umich.edu /* Context must be set */ 5385222Sksewell@umich.edu Flt->Context_BadVPN2 = (VPN >> 2); 5395222Sksewell@umich.edu return Flt; 5405222Sksewell@umich.edu 5415222Sksewell@umich.edu } 5425222Sksewell@umich.edu Addr PAddr; 5435222Sksewell@umich.edu if(EvenOdd == 0){ 5445222Sksewell@umich.edu PAddr = pte->PFN0; 5455222Sksewell@umich.edu }else{ 5465222Sksewell@umich.edu PAddr = pte->PFN1; 5475222Sksewell@umich.edu } 5485222Sksewell@umich.edu PAddr >>= (pte->AddrShiftAmount-12); 5495222Sksewell@umich.edu PAddr <<= pte->AddrShiftAmount; 5505222Sksewell@umich.edu PAddr |= ((req->getVaddr()) & pte->OffsetMask); 5515222Sksewell@umich.edu req->setPaddr(PAddr); 5525222Sksewell@umich.edu } 5535222Sksewell@umich.edu } 5545222Sksewell@umich.edu else 5555222Sksewell@umich.edu { // Didn't find any match, return a TLB Refill Exception 5565543Ssaidi@eecs.umich.edu // misses++; 5575222Sksewell@umich.edu DtbRefillFault *Flt=new DtbRefillFault(); 5585222Sksewell@umich.edu /* EntryHi VPN, ASID fields must be set */ 5595222Sksewell@umich.edu Flt->EntryHi_Asid = Asid; 5605222Sksewell@umich.edu Flt->EntryHi_VPN2 = (VPN>>2); 5615222Sksewell@umich.edu Flt->EntryHi_VPN2X = (VPN & 0x3); 5625222Sksewell@umich.edu 5635222Sksewell@umich.edu 5645222Sksewell@umich.edu /* BadVAddr must be set */ 5655222Sksewell@umich.edu Flt->BadVAddr = req->getVaddr(); 5665222Sksewell@umich.edu 5675222Sksewell@umich.edu /* Context must be set */ 5685222Sksewell@umich.edu Flt->Context_BadVPN2 = (VPN >> 2); 5695222Sksewell@umich.edu return Flt; 5705222Sksewell@umich.edu } 5715222Sksewell@umich.edu } 5725222Sksewell@umich.edu return checkCacheability(req); 5735224Sksewell@umich.edu#endif 5745222Sksewell@umich.edu} 5755222Sksewell@umich.edu 5766022Sgblack@eecs.umich.eduFault 5776023Snate@binkert.orgTLB::translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode) 5786022Sgblack@eecs.umich.edu{ 5796023Snate@binkert.org if (mode == Execute) 5806022Sgblack@eecs.umich.edu return translateInst(req, tc); 5816022Sgblack@eecs.umich.edu else 5826023Snate@binkert.org return translateData(req, tc, mode == Write); 5836022Sgblack@eecs.umich.edu} 5846022Sgblack@eecs.umich.edu 5855894Sgblack@eecs.umich.eduvoid 5866022Sgblack@eecs.umich.eduTLB::translateTiming(RequestPtr req, ThreadContext *tc, 5876023Snate@binkert.org Translation *translation, Mode mode) 5885894Sgblack@eecs.umich.edu{ 5895894Sgblack@eecs.umich.edu assert(translation); 5906023Snate@binkert.org translation->finish(translateAtomic(req, tc, mode), req, tc, mode); 5915894Sgblack@eecs.umich.edu} 5925894Sgblack@eecs.umich.edu 5935222Sksewell@umich.edu 5945222Sksewell@umich.eduMipsISA::PTE & 5955222Sksewell@umich.eduTLB::index(bool advance) 5965222Sksewell@umich.edu{ 5975222Sksewell@umich.edu MipsISA::PTE *pte = &table[nlu]; 5985222Sksewell@umich.edu 5995222Sksewell@umich.edu if (advance) 6005222Sksewell@umich.edu nextnlu(); 6015222Sksewell@umich.edu 6025222Sksewell@umich.edu return *pte; 6035222Sksewell@umich.edu} 6044997Sgblack@eecs.umich.edu 6056022Sgblack@eecs.umich.eduMipsISA::TLB * 6066022Sgblack@eecs.umich.eduMipsTLBParams::create() 6074997Sgblack@eecs.umich.edu{ 6086022Sgblack@eecs.umich.edu return new MipsISA::TLB(this); 6094997Sgblack@eecs.umich.edu} 610