tlb.cc revision 4962
12SN/A/* 21762SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 292665Ssaidi@eecs.umich.edu * Steve Reinhardt 302665Ssaidi@eecs.umich.edu * Andrew Schultz 312SN/A */ 322SN/A 332SN/A#include <string> 342SN/A#include <vector> 352SN/A 362984Sgblack@eecs.umich.edu#include "arch/alpha/pagetable.hh" 372171SN/A#include "arch/alpha/tlb.hh" 382984Sgblack@eecs.umich.edu#include "arch/alpha/faults.hh" 39146SN/A#include "base/inifile.hh" 40146SN/A#include "base/str.hh" 41146SN/A#include "base/trace.hh" 421858SN/A#include "config/alpha_tlaser.hh" 432680Sktlim@umich.edu#include "cpu/thread_context.hh" 444762Snate@binkert.org#include "params/AlphaDTB.hh" 454762Snate@binkert.org#include "params/AlphaITB.hh" 462SN/A 472SN/Ausing namespace std; 481147SN/Ausing namespace EV5; 492SN/A 504088Sbinkertn@umich.edunamespace AlphaISA { 513838Shsul@eecs.umich.edu/////////////////////////////////////////////////////////////////////// 523838Shsul@eecs.umich.edu// 533838Shsul@eecs.umich.edu// Alpha TLB 543838Shsul@eecs.umich.edu// 55860SN/A#ifdef DEBUG 563838Shsul@eecs.umich.edubool uncacheBit39 = false; 573838Shsul@eecs.umich.edubool uncacheBit40 = false; 58860SN/A#endif 59860SN/A 601147SN/A#define MODE2MASK(X) (1 << (X)) 611147SN/A 623838Shsul@eecs.umich.eduTLB::TLB(const string &name, int s) 633838Shsul@eecs.umich.edu : SimObject(name), size(s), nlu(0) 643838Shsul@eecs.umich.edu{ 653838Shsul@eecs.umich.edu table = new PTE[size]; 663838Shsul@eecs.umich.edu memset(table, 0, sizeof(PTE[size])); 674957Sacolyte@umich.edu flushCache(); 683838Shsul@eecs.umich.edu} 692SN/A 703838Shsul@eecs.umich.eduTLB::~TLB() 713838Shsul@eecs.umich.edu{ 723838Shsul@eecs.umich.edu if (table) 733838Shsul@eecs.umich.edu delete [] table; 743838Shsul@eecs.umich.edu} 752SN/A 763838Shsul@eecs.umich.edu// look up an entry in the TLB 773838Shsul@eecs.umich.eduPTE * 783838Shsul@eecs.umich.eduTLB::lookup(Addr vpn, uint8_t asn) const 793838Shsul@eecs.umich.edu{ 803838Shsul@eecs.umich.edu // assume not found... 813838Shsul@eecs.umich.edu PTE *retval = NULL; 822SN/A 834962Sacolyte@umich.edu if (PTECache[0]) { 844962Sacolyte@umich.edu if (vpn == PTECache[0]->tag && 854962Sacolyte@umich.edu (PTECache[0]->asma || PTECache[0]->asn == asn)) 864962Sacolyte@umich.edu retval = PTECache[0]; 874962Sacolyte@umich.edu else if (PTECache[1]) { 884962Sacolyte@umich.edu if (vpn == PTECache[1]->tag && 894962Sacolyte@umich.edu (PTECache[1]->asma || PTECache[1]->asn == asn)) 904962Sacolyte@umich.edu retval = PTECache[1]; 914962Sacolyte@umich.edu else if (PTECache[2] && vpn == PTECache[2]->tag && 924962Sacolyte@umich.edu (PTECache[2]->asma || PTECache[2]->asn == asn)) 934962Sacolyte@umich.edu retval = PTECache[2]; 944962Sacolyte@umich.edu } 954962Sacolyte@umich.edu } 964962Sacolyte@umich.edu 974962Sacolyte@umich.edu if (retval == NULL) 984957Sacolyte@umich.edu PageTable::const_iterator i = lookupTable.find(vpn); 994957Sacolyte@umich.edu if (i != lookupTable.end()) { 1004957Sacolyte@umich.edu while (i->first == vpn) { 1014957Sacolyte@umich.edu int index = i->second; 1024957Sacolyte@umich.edu PTE *pte = &table[index]; 1034957Sacolyte@umich.edu assert(pte->valid); 1044957Sacolyte@umich.edu if (vpn == pte->tag && (pte->asma || pte->asn == asn)) { 1054957Sacolyte@umich.edu retval = pte; 1064962Sacolyte@umich.edu PTECache[2] = PTECache[1]; 1074962Sacolyte@umich.edu PTECache[1] = PTECache[0]; 1084962Sacolyte@umich.edu PTECache[0] = pte; 1094957Sacolyte@umich.edu break; 1104957Sacolyte@umich.edu } 1114957Sacolyte@umich.edu 1124957Sacolyte@umich.edu ++i; 1131413SN/A } 1141413SN/A } 1152SN/A } 1162SN/A 1173838Shsul@eecs.umich.edu DPRINTF(TLB, "lookup %#x, asn %#x -> %s ppn %#x\n", vpn, (int)asn, 1183838Shsul@eecs.umich.edu retval ? "hit" : "miss", retval ? retval->ppn : 0); 1193838Shsul@eecs.umich.edu return retval; 1203838Shsul@eecs.umich.edu} 1212SN/A 1222SN/A 1233838Shsul@eecs.umich.eduFault 1243838Shsul@eecs.umich.eduTLB::checkCacheability(RequestPtr &req) 1253838Shsul@eecs.umich.edu{ 1263838Shsul@eecs.umich.edu// in Alpha, cacheability is controlled by upper-level bits of the 1273838Shsul@eecs.umich.edu// physical address 1283838Shsul@eecs.umich.edu 1293838Shsul@eecs.umich.edu/* 1303838Shsul@eecs.umich.edu * We support having the uncacheable bit in either bit 39 or bit 40. 1313838Shsul@eecs.umich.edu * The Turbolaser platform (and EV5) support having the bit in 39, but 1323838Shsul@eecs.umich.edu * Tsunami (which Linux assumes uses an EV6) generates accesses with 1333838Shsul@eecs.umich.edu * the bit in 40. So we must check for both, but we have debug flags 1343838Shsul@eecs.umich.edu * to catch a weird case where both are used, which shouldn't happen. 1353838Shsul@eecs.umich.edu */ 1363838Shsul@eecs.umich.edu 1373838Shsul@eecs.umich.edu 1383838Shsul@eecs.umich.edu#if ALPHA_TLASER 1394088Sbinkertn@umich.edu if (req->getPaddr() & PAddrUncachedBit39) 1403838Shsul@eecs.umich.edu#else 1414088Sbinkertn@umich.edu if (req->getPaddr() & PAddrUncachedBit43) 1423838Shsul@eecs.umich.edu#endif 1434088Sbinkertn@umich.edu { 1443838Shsul@eecs.umich.edu // IPR memory space not implemented 1453838Shsul@eecs.umich.edu if (PAddrIprSpace(req->getPaddr())) { 1463838Shsul@eecs.umich.edu return new UnimpFault("IPR memory space not implemented!"); 1473838Shsul@eecs.umich.edu } else { 1483838Shsul@eecs.umich.edu // mark request as uncacheable 1493838Shsul@eecs.umich.edu req->setFlags(req->getFlags() | UNCACHEABLE); 1503838Shsul@eecs.umich.edu 1513838Shsul@eecs.umich.edu#if !ALPHA_TLASER 1523838Shsul@eecs.umich.edu // Clear bits 42:35 of the physical address (10-2 in Tsunami manual) 1533838Shsul@eecs.umich.edu req->setPaddr(req->getPaddr() & PAddrUncachedMask); 1543838Shsul@eecs.umich.edu#endif 155924SN/A } 1562SN/A } 1573838Shsul@eecs.umich.edu return NoFault; 1583838Shsul@eecs.umich.edu} 1592SN/A 1602SN/A 1613838Shsul@eecs.umich.edu// insert a new TLB entry 1623838Shsul@eecs.umich.eduvoid 1633838Shsul@eecs.umich.eduTLB::insert(Addr addr, PTE &pte) 1643838Shsul@eecs.umich.edu{ 1654957Sacolyte@umich.edu flushCache(); 1663838Shsul@eecs.umich.edu VAddr vaddr = addr; 1673838Shsul@eecs.umich.edu if (table[nlu].valid) { 1683838Shsul@eecs.umich.edu Addr oldvpn = table[nlu].tag; 1693838Shsul@eecs.umich.edu PageTable::iterator i = lookupTable.find(oldvpn); 1703838Shsul@eecs.umich.edu 1713838Shsul@eecs.umich.edu if (i == lookupTable.end()) 1723838Shsul@eecs.umich.edu panic("TLB entry not found in lookupTable"); 1733838Shsul@eecs.umich.edu 1743838Shsul@eecs.umich.edu int index; 1753838Shsul@eecs.umich.edu while ((index = i->second) != nlu) { 1763838Shsul@eecs.umich.edu if (table[index].tag != oldvpn) 1773838Shsul@eecs.umich.edu panic("TLB entry not found in lookupTable"); 1783838Shsul@eecs.umich.edu 1793838Shsul@eecs.umich.edu ++i; 1803838Shsul@eecs.umich.edu } 1813838Shsul@eecs.umich.edu 1823838Shsul@eecs.umich.edu DPRINTF(TLB, "remove @%d: %#x -> %#x\n", nlu, oldvpn, table[nlu].ppn); 1833838Shsul@eecs.umich.edu 1843838Shsul@eecs.umich.edu lookupTable.erase(i); 1853838Shsul@eecs.umich.edu } 1863838Shsul@eecs.umich.edu 1873838Shsul@eecs.umich.edu DPRINTF(TLB, "insert @%d: %#x -> %#x\n", nlu, vaddr.vpn(), pte.ppn); 1883838Shsul@eecs.umich.edu 1893838Shsul@eecs.umich.edu table[nlu] = pte; 1903838Shsul@eecs.umich.edu table[nlu].tag = vaddr.vpn(); 1913838Shsul@eecs.umich.edu table[nlu].valid = true; 1923838Shsul@eecs.umich.edu 1933838Shsul@eecs.umich.edu lookupTable.insert(make_pair(vaddr.vpn(), nlu)); 1943838Shsul@eecs.umich.edu nextnlu(); 1953838Shsul@eecs.umich.edu} 1963838Shsul@eecs.umich.edu 1973838Shsul@eecs.umich.eduvoid 1983838Shsul@eecs.umich.eduTLB::flushAll() 1993838Shsul@eecs.umich.edu{ 2003838Shsul@eecs.umich.edu DPRINTF(TLB, "flushAll\n"); 2013838Shsul@eecs.umich.edu memset(table, 0, sizeof(PTE[size])); 2024957Sacolyte@umich.edu flushCache(); 2033838Shsul@eecs.umich.edu lookupTable.clear(); 2043838Shsul@eecs.umich.edu nlu = 0; 2053838Shsul@eecs.umich.edu} 2063838Shsul@eecs.umich.edu 2073838Shsul@eecs.umich.eduvoid 2083838Shsul@eecs.umich.eduTLB::flushProcesses() 2093838Shsul@eecs.umich.edu{ 2104957Sacolyte@umich.edu flushCache(); 2113838Shsul@eecs.umich.edu PageTable::iterator i = lookupTable.begin(); 2123838Shsul@eecs.umich.edu PageTable::iterator end = lookupTable.end(); 2133838Shsul@eecs.umich.edu while (i != end) { 2143838Shsul@eecs.umich.edu int index = i->second; 2153838Shsul@eecs.umich.edu PTE *pte = &table[index]; 2163838Shsul@eecs.umich.edu assert(pte->valid); 2173838Shsul@eecs.umich.edu 2183838Shsul@eecs.umich.edu // we can't increment i after we erase it, so save a copy and 2193838Shsul@eecs.umich.edu // increment it to get the next entry now 2203838Shsul@eecs.umich.edu PageTable::iterator cur = i; 2213838Shsul@eecs.umich.edu ++i; 2223838Shsul@eecs.umich.edu 2233838Shsul@eecs.umich.edu if (!pte->asma) { 2243838Shsul@eecs.umich.edu DPRINTF(TLB, "flush @%d: %#x -> %#x\n", index, pte->tag, pte->ppn); 2253838Shsul@eecs.umich.edu pte->valid = false; 2263838Shsul@eecs.umich.edu lookupTable.erase(cur); 2273453Sgblack@eecs.umich.edu } 2283453Sgblack@eecs.umich.edu } 2293838Shsul@eecs.umich.edu} 2302SN/A 2313838Shsul@eecs.umich.eduvoid 2323838Shsul@eecs.umich.eduTLB::flushAddr(Addr addr, uint8_t asn) 2333838Shsul@eecs.umich.edu{ 2344957Sacolyte@umich.edu flushCache(); 2353838Shsul@eecs.umich.edu VAddr vaddr = addr; 2362SN/A 2373838Shsul@eecs.umich.edu PageTable::iterator i = lookupTable.find(vaddr.vpn()); 2383838Shsul@eecs.umich.edu if (i == lookupTable.end()) 2393838Shsul@eecs.umich.edu return; 2402SN/A 2414428Ssaidi@eecs.umich.edu while (i != lookupTable.end() && i->first == vaddr.vpn()) { 2423838Shsul@eecs.umich.edu int index = i->second; 2433838Shsul@eecs.umich.edu PTE *pte = &table[index]; 2443838Shsul@eecs.umich.edu assert(pte->valid); 2453453Sgblack@eecs.umich.edu 2463838Shsul@eecs.umich.edu if (vaddr.vpn() == pte->tag && (pte->asma || pte->asn == asn)) { 2473838Shsul@eecs.umich.edu DPRINTF(TLB, "flushaddr @%d: %#x -> %#x\n", index, vaddr.vpn(), 2483838Shsul@eecs.umich.edu pte->ppn); 2493453Sgblack@eecs.umich.edu 2503838Shsul@eecs.umich.edu // invalidate this entry 2513838Shsul@eecs.umich.edu pte->valid = false; 2523838Shsul@eecs.umich.edu 2534428Ssaidi@eecs.umich.edu lookupTable.erase(i++); 2544428Ssaidi@eecs.umich.edu } else { 2554428Ssaidi@eecs.umich.edu ++i; 2563838Shsul@eecs.umich.edu } 2573838Shsul@eecs.umich.edu } 2583838Shsul@eecs.umich.edu} 2593838Shsul@eecs.umich.edu 2603838Shsul@eecs.umich.edu 2613838Shsul@eecs.umich.eduvoid 2623838Shsul@eecs.umich.eduTLB::serialize(ostream &os) 2633838Shsul@eecs.umich.edu{ 2643838Shsul@eecs.umich.edu SERIALIZE_SCALAR(size); 2653838Shsul@eecs.umich.edu SERIALIZE_SCALAR(nlu); 2663838Shsul@eecs.umich.edu 2673838Shsul@eecs.umich.edu for (int i = 0; i < size; i++) { 2683838Shsul@eecs.umich.edu nameOut(os, csprintf("%s.PTE%d", name(), i)); 2693838Shsul@eecs.umich.edu table[i].serialize(os); 2703838Shsul@eecs.umich.edu } 2713838Shsul@eecs.umich.edu} 2723838Shsul@eecs.umich.edu 2733838Shsul@eecs.umich.eduvoid 2743838Shsul@eecs.umich.eduTLB::unserialize(Checkpoint *cp, const string §ion) 2753838Shsul@eecs.umich.edu{ 2763838Shsul@eecs.umich.edu UNSERIALIZE_SCALAR(size); 2773838Shsul@eecs.umich.edu UNSERIALIZE_SCALAR(nlu); 2783838Shsul@eecs.umich.edu 2793838Shsul@eecs.umich.edu for (int i = 0; i < size; i++) { 2803838Shsul@eecs.umich.edu table[i].unserialize(cp, csprintf("%s.PTE%d", section, i)); 2813838Shsul@eecs.umich.edu if (table[i].valid) { 2823838Shsul@eecs.umich.edu lookupTable.insert(make_pair(table[i].tag, i)); 2833838Shsul@eecs.umich.edu } 2843838Shsul@eecs.umich.edu } 2853838Shsul@eecs.umich.edu} 2863838Shsul@eecs.umich.edu 2873838Shsul@eecs.umich.edu 2883838Shsul@eecs.umich.edu/////////////////////////////////////////////////////////////////////// 2893838Shsul@eecs.umich.edu// 2903838Shsul@eecs.umich.edu// Alpha ITB 2913838Shsul@eecs.umich.edu// 2923838Shsul@eecs.umich.eduITB::ITB(const std::string &name, int size) 2933838Shsul@eecs.umich.edu : TLB(name, size) 2943838Shsul@eecs.umich.edu{} 2953838Shsul@eecs.umich.edu 2963838Shsul@eecs.umich.edu 2973838Shsul@eecs.umich.eduvoid 2983838Shsul@eecs.umich.eduITB::regStats() 2993838Shsul@eecs.umich.edu{ 3003838Shsul@eecs.umich.edu hits 3013838Shsul@eecs.umich.edu .name(name() + ".hits") 3023838Shsul@eecs.umich.edu .desc("ITB hits"); 3033838Shsul@eecs.umich.edu misses 3043838Shsul@eecs.umich.edu .name(name() + ".misses") 3053838Shsul@eecs.umich.edu .desc("ITB misses"); 3063838Shsul@eecs.umich.edu acv 3073838Shsul@eecs.umich.edu .name(name() + ".acv") 3083838Shsul@eecs.umich.edu .desc("ITB acv"); 3093838Shsul@eecs.umich.edu accesses 3103838Shsul@eecs.umich.edu .name(name() + ".accesses") 3113838Shsul@eecs.umich.edu .desc("ITB accesses"); 3123838Shsul@eecs.umich.edu 3133838Shsul@eecs.umich.edu accesses = hits + misses; 3143838Shsul@eecs.umich.edu} 3153838Shsul@eecs.umich.edu 3163838Shsul@eecs.umich.edu 3173838Shsul@eecs.umich.eduFault 3183838Shsul@eecs.umich.eduITB::translate(RequestPtr &req, ThreadContext *tc) const 3193838Shsul@eecs.umich.edu{ 3204375Sgblack@eecs.umich.edu //If this is a pal pc, then set PHYSICAL 3214375Sgblack@eecs.umich.edu if(FULL_SYSTEM && PcPAL(req->getPC())) 3224375Sgblack@eecs.umich.edu req->setFlags(req->getFlags() | PHYSICAL); 3234375Sgblack@eecs.umich.edu 3243838Shsul@eecs.umich.edu if (PcPAL(req->getPC())) { 3253838Shsul@eecs.umich.edu // strip off PAL PC marker (lsb is 1) 3263838Shsul@eecs.umich.edu req->setPaddr((req->getVaddr() & ~3) & PAddrImplMask); 3273838Shsul@eecs.umich.edu hits++; 3283838Shsul@eecs.umich.edu return NoFault; 3293453Sgblack@eecs.umich.edu } 3303453Sgblack@eecs.umich.edu 3313838Shsul@eecs.umich.edu if (req->getFlags() & PHYSICAL) { 3323838Shsul@eecs.umich.edu req->setPaddr(req->getVaddr()); 3333838Shsul@eecs.umich.edu } else { 3343838Shsul@eecs.umich.edu // verify that this is a good virtual address 3353838Shsul@eecs.umich.edu if (!validVirtualAddress(req->getVaddr())) { 3363838Shsul@eecs.umich.edu acv++; 3373838Shsul@eecs.umich.edu return new ItbAcvFault(req->getVaddr()); 3382SN/A } 3392SN/A 3403838Shsul@eecs.umich.edu 3413838Shsul@eecs.umich.edu // VA<42:41> == 2, VA<39:13> maps directly to PA<39:13> for EV5 3423838Shsul@eecs.umich.edu // VA<47:41> == 0x7e, VA<40:13> maps directly to PA<40:13> for EV6 3433838Shsul@eecs.umich.edu#if ALPHA_TLASER 3444172Ssaidi@eecs.umich.edu if ((MCSR_SP(tc->readMiscRegNoEffect(IPR_MCSR)) & 2) && 3454088Sbinkertn@umich.edu VAddrSpaceEV5(req->getVaddr()) == 2) 3463838Shsul@eecs.umich.edu#else 3474088Sbinkertn@umich.edu if (VAddrSpaceEV6(req->getVaddr()) == 0x7e) 3483838Shsul@eecs.umich.edu#endif 3494088Sbinkertn@umich.edu { 3503838Shsul@eecs.umich.edu // only valid in kernel mode 3514172Ssaidi@eecs.umich.edu if (ICM_CM(tc->readMiscRegNoEffect(IPR_ICM)) != 3523838Shsul@eecs.umich.edu mode_kernel) { 353555SN/A acv++; 3542532SN/A return new ItbAcvFault(req->getVaddr()); 355555SN/A } 3562SN/A 3573838Shsul@eecs.umich.edu req->setPaddr(req->getVaddr() & PAddrImplMask); 358551SN/A 3591858SN/A#if !ALPHA_TLASER 3603838Shsul@eecs.umich.edu // sign extend the physical address properly 3613838Shsul@eecs.umich.edu if (req->getPaddr() & PAddrUncachedBit40) 3623838Shsul@eecs.umich.edu req->setPaddr(req->getPaddr() | ULL(0xf0000000000)); 3633838Shsul@eecs.umich.edu else 3643838Shsul@eecs.umich.edu req->setPaddr(req->getPaddr() & ULL(0xffffffffff)); 365924SN/A#endif 366828SN/A 3673838Shsul@eecs.umich.edu } else { 3683838Shsul@eecs.umich.edu // not a physical address: need to look up pte 3694172Ssaidi@eecs.umich.edu int asn = DTB_ASN_ASN(tc->readMiscRegNoEffect(IPR_DTB_ASN)); 3703838Shsul@eecs.umich.edu PTE *pte = lookup(VAddr(req->getVaddr()).vpn(), 3713838Shsul@eecs.umich.edu asn); 3723838Shsul@eecs.umich.edu 3733838Shsul@eecs.umich.edu if (!pte) { 3743838Shsul@eecs.umich.edu misses++; 3753838Shsul@eecs.umich.edu return new ItbPageFault(req->getVaddr()); 3763838Shsul@eecs.umich.edu } 3773838Shsul@eecs.umich.edu 3783838Shsul@eecs.umich.edu req->setPaddr((pte->ppn << PageShift) + 3793838Shsul@eecs.umich.edu (VAddr(req->getVaddr()).offset() 3803838Shsul@eecs.umich.edu & ~3)); 3813838Shsul@eecs.umich.edu 3823838Shsul@eecs.umich.edu // check permissions for this access 3833838Shsul@eecs.umich.edu if (!(pte->xre & 3844172Ssaidi@eecs.umich.edu (1 << ICM_CM(tc->readMiscRegNoEffect(IPR_ICM))))) { 3853838Shsul@eecs.umich.edu // instruction access fault 3863838Shsul@eecs.umich.edu acv++; 3873838Shsul@eecs.umich.edu return new ItbAcvFault(req->getVaddr()); 3883838Shsul@eecs.umich.edu } 3893838Shsul@eecs.umich.edu 3903838Shsul@eecs.umich.edu hits++; 3913838Shsul@eecs.umich.edu } 3923838Shsul@eecs.umich.edu } 3933838Shsul@eecs.umich.edu 3943838Shsul@eecs.umich.edu // check that the physical address is ok (catch bad physical addresses) 3953838Shsul@eecs.umich.edu if (req->getPaddr() & ~PAddrImplMask) 3963838Shsul@eecs.umich.edu return genMachineCheckFault(); 3973838Shsul@eecs.umich.edu 3983838Shsul@eecs.umich.edu return checkCacheability(req); 3993838Shsul@eecs.umich.edu 4003838Shsul@eecs.umich.edu} 4013838Shsul@eecs.umich.edu 4023838Shsul@eecs.umich.edu/////////////////////////////////////////////////////////////////////// 4033838Shsul@eecs.umich.edu// 4043838Shsul@eecs.umich.edu// Alpha DTB 4053838Shsul@eecs.umich.edu// 4063838Shsul@eecs.umich.edu DTB::DTB(const std::string &name, int size) 4073838Shsul@eecs.umich.edu : TLB(name, size) 4083838Shsul@eecs.umich.edu{} 4093838Shsul@eecs.umich.edu 4103838Shsul@eecs.umich.eduvoid 4113838Shsul@eecs.umich.eduDTB::regStats() 4123838Shsul@eecs.umich.edu{ 4133838Shsul@eecs.umich.edu read_hits 4143838Shsul@eecs.umich.edu .name(name() + ".read_hits") 4153838Shsul@eecs.umich.edu .desc("DTB read hits") 4163838Shsul@eecs.umich.edu ; 4173838Shsul@eecs.umich.edu 4183838Shsul@eecs.umich.edu read_misses 4193838Shsul@eecs.umich.edu .name(name() + ".read_misses") 4203838Shsul@eecs.umich.edu .desc("DTB read misses") 4213838Shsul@eecs.umich.edu ; 4223838Shsul@eecs.umich.edu 4233838Shsul@eecs.umich.edu read_acv 4243838Shsul@eecs.umich.edu .name(name() + ".read_acv") 4253838Shsul@eecs.umich.edu .desc("DTB read access violations") 4263838Shsul@eecs.umich.edu ; 4273838Shsul@eecs.umich.edu 4283838Shsul@eecs.umich.edu read_accesses 4293838Shsul@eecs.umich.edu .name(name() + ".read_accesses") 4303838Shsul@eecs.umich.edu .desc("DTB read accesses") 4313838Shsul@eecs.umich.edu ; 4323838Shsul@eecs.umich.edu 4333838Shsul@eecs.umich.edu write_hits 4343838Shsul@eecs.umich.edu .name(name() + ".write_hits") 4353838Shsul@eecs.umich.edu .desc("DTB write hits") 4363838Shsul@eecs.umich.edu ; 4373838Shsul@eecs.umich.edu 4383838Shsul@eecs.umich.edu write_misses 4393838Shsul@eecs.umich.edu .name(name() + ".write_misses") 4403838Shsul@eecs.umich.edu .desc("DTB write misses") 4413838Shsul@eecs.umich.edu ; 4423838Shsul@eecs.umich.edu 4433838Shsul@eecs.umich.edu write_acv 4443838Shsul@eecs.umich.edu .name(name() + ".write_acv") 4453838Shsul@eecs.umich.edu .desc("DTB write access violations") 4463838Shsul@eecs.umich.edu ; 4473838Shsul@eecs.umich.edu 4483838Shsul@eecs.umich.edu write_accesses 4493838Shsul@eecs.umich.edu .name(name() + ".write_accesses") 4503838Shsul@eecs.umich.edu .desc("DTB write accesses") 4513838Shsul@eecs.umich.edu ; 4523838Shsul@eecs.umich.edu 4533838Shsul@eecs.umich.edu hits 4543838Shsul@eecs.umich.edu .name(name() + ".hits") 4553838Shsul@eecs.umich.edu .desc("DTB hits") 4563838Shsul@eecs.umich.edu ; 4573838Shsul@eecs.umich.edu 4583838Shsul@eecs.umich.edu misses 4593838Shsul@eecs.umich.edu .name(name() + ".misses") 4603838Shsul@eecs.umich.edu .desc("DTB misses") 4613838Shsul@eecs.umich.edu ; 4623838Shsul@eecs.umich.edu 4633838Shsul@eecs.umich.edu acv 4643838Shsul@eecs.umich.edu .name(name() + ".acv") 4653838Shsul@eecs.umich.edu .desc("DTB access violations") 4663838Shsul@eecs.umich.edu ; 4673838Shsul@eecs.umich.edu 4683838Shsul@eecs.umich.edu accesses 4693838Shsul@eecs.umich.edu .name(name() + ".accesses") 4703838Shsul@eecs.umich.edu .desc("DTB accesses") 4713838Shsul@eecs.umich.edu ; 4723838Shsul@eecs.umich.edu 4733838Shsul@eecs.umich.edu hits = read_hits + write_hits; 4743838Shsul@eecs.umich.edu misses = read_misses + write_misses; 4753838Shsul@eecs.umich.edu acv = read_acv + write_acv; 4763838Shsul@eecs.umich.edu accesses = read_accesses + write_accesses; 4773838Shsul@eecs.umich.edu} 4783838Shsul@eecs.umich.edu 4793838Shsul@eecs.umich.eduFault 4803838Shsul@eecs.umich.eduDTB::translate(RequestPtr &req, ThreadContext *tc, bool write) const 4813838Shsul@eecs.umich.edu{ 4823838Shsul@eecs.umich.edu Addr pc = tc->readPC(); 4833838Shsul@eecs.umich.edu 4843838Shsul@eecs.umich.edu mode_type mode = 4854172Ssaidi@eecs.umich.edu (mode_type)DTB_CM_CM(tc->readMiscRegNoEffect(IPR_DTB_CM)); 4863838Shsul@eecs.umich.edu 4873838Shsul@eecs.umich.edu 4883838Shsul@eecs.umich.edu /** 4893838Shsul@eecs.umich.edu * Check for alignment faults 4903838Shsul@eecs.umich.edu */ 4913838Shsul@eecs.umich.edu if (req->getVaddr() & (req->getSize() - 1)) { 4923838Shsul@eecs.umich.edu DPRINTF(TLB, "Alignment Fault on %#x, size = %d", req->getVaddr(), 4933838Shsul@eecs.umich.edu req->getSize()); 4943838Shsul@eecs.umich.edu uint64_t flags = write ? MM_STAT_WR_MASK : 0; 4953838Shsul@eecs.umich.edu return new DtbAlignmentFault(req->getVaddr(), req->getFlags(), flags); 4963838Shsul@eecs.umich.edu } 4973838Shsul@eecs.umich.edu 4983838Shsul@eecs.umich.edu if (PcPAL(pc)) { 4993838Shsul@eecs.umich.edu mode = (req->getFlags() & ALTMODE) ? 5003838Shsul@eecs.umich.edu (mode_type)ALT_MODE_AM( 5014172Ssaidi@eecs.umich.edu tc->readMiscRegNoEffect(IPR_ALT_MODE)) 5023838Shsul@eecs.umich.edu : mode_kernel; 5033838Shsul@eecs.umich.edu } 5043838Shsul@eecs.umich.edu 5053838Shsul@eecs.umich.edu if (req->getFlags() & PHYSICAL) { 5063838Shsul@eecs.umich.edu req->setPaddr(req->getVaddr()); 5073838Shsul@eecs.umich.edu } else { 5083838Shsul@eecs.umich.edu // verify that this is a good virtual address 5093838Shsul@eecs.umich.edu if (!validVirtualAddress(req->getVaddr())) { 5103838Shsul@eecs.umich.edu if (write) { write_acv++; } else { read_acv++; } 5113838Shsul@eecs.umich.edu uint64_t flags = (write ? MM_STAT_WR_MASK : 0) | 5123838Shsul@eecs.umich.edu MM_STAT_BAD_VA_MASK | 5133838Shsul@eecs.umich.edu MM_STAT_ACV_MASK; 5143838Shsul@eecs.umich.edu return new DtbPageFault(req->getVaddr(), req->getFlags(), flags); 5153838Shsul@eecs.umich.edu } 5163838Shsul@eecs.umich.edu 5173838Shsul@eecs.umich.edu // Check for "superpage" mapping 5183838Shsul@eecs.umich.edu#if ALPHA_TLASER 5194172Ssaidi@eecs.umich.edu if ((MCSR_SP(tc->readMiscRegNoEffect(IPR_MCSR)) & 2) && 5204088Sbinkertn@umich.edu VAddrSpaceEV5(req->getVaddr()) == 2) 5213838Shsul@eecs.umich.edu#else 5224088Sbinkertn@umich.edu if (VAddrSpaceEV6(req->getVaddr()) == 0x7e) 5233838Shsul@eecs.umich.edu#endif 5244088Sbinkertn@umich.edu { 5253838Shsul@eecs.umich.edu 5263838Shsul@eecs.umich.edu // only valid in kernel mode 5274172Ssaidi@eecs.umich.edu if (DTB_CM_CM(tc->readMiscRegNoEffect(IPR_DTB_CM)) != 5283838Shsul@eecs.umich.edu mode_kernel) { 5293838Shsul@eecs.umich.edu if (write) { write_acv++; } else { read_acv++; } 5303838Shsul@eecs.umich.edu uint64_t flags = ((write ? MM_STAT_WR_MASK : 0) | 5313838Shsul@eecs.umich.edu MM_STAT_ACV_MASK); 5323838Shsul@eecs.umich.edu return new DtbAcvFault(req->getVaddr(), req->getFlags(), flags); 5333838Shsul@eecs.umich.edu } 5343838Shsul@eecs.umich.edu 5353838Shsul@eecs.umich.edu req->setPaddr(req->getVaddr() & PAddrImplMask); 5363838Shsul@eecs.umich.edu 5373838Shsul@eecs.umich.edu#if !ALPHA_TLASER 5383838Shsul@eecs.umich.edu // sign extend the physical address properly 5393838Shsul@eecs.umich.edu if (req->getPaddr() & PAddrUncachedBit40) 5403838Shsul@eecs.umich.edu req->setPaddr(req->getPaddr() | ULL(0xf0000000000)); 5413838Shsul@eecs.umich.edu else 5423838Shsul@eecs.umich.edu req->setPaddr(req->getPaddr() & ULL(0xffffffffff)); 5433838Shsul@eecs.umich.edu#endif 5443838Shsul@eecs.umich.edu 5453838Shsul@eecs.umich.edu } else { 5463838Shsul@eecs.umich.edu if (write) 5473838Shsul@eecs.umich.edu write_accesses++; 5483838Shsul@eecs.umich.edu else 5493838Shsul@eecs.umich.edu read_accesses++; 5503838Shsul@eecs.umich.edu 5514172Ssaidi@eecs.umich.edu int asn = DTB_ASN_ASN(tc->readMiscRegNoEffect(IPR_DTB_ASN)); 5523838Shsul@eecs.umich.edu 5533838Shsul@eecs.umich.edu // not a physical address: need to look up pte 5543838Shsul@eecs.umich.edu PTE *pte = lookup(VAddr(req->getVaddr()).vpn(), 5553838Shsul@eecs.umich.edu asn); 5563838Shsul@eecs.umich.edu 5573838Shsul@eecs.umich.edu if (!pte) { 5583838Shsul@eecs.umich.edu // page fault 5593838Shsul@eecs.umich.edu if (write) { write_misses++; } else { read_misses++; } 5603838Shsul@eecs.umich.edu uint64_t flags = (write ? MM_STAT_WR_MASK : 0) | 5613838Shsul@eecs.umich.edu MM_STAT_DTB_MISS_MASK; 5623838Shsul@eecs.umich.edu return (req->getFlags() & VPTE) ? 5633838Shsul@eecs.umich.edu (Fault)(new PDtbMissFault(req->getVaddr(), req->getFlags(), 5643838Shsul@eecs.umich.edu flags)) : 5653838Shsul@eecs.umich.edu (Fault)(new NDtbMissFault(req->getVaddr(), req->getFlags(), 5663838Shsul@eecs.umich.edu flags)); 5673838Shsul@eecs.umich.edu } 5683838Shsul@eecs.umich.edu 5693838Shsul@eecs.umich.edu req->setPaddr((pte->ppn << PageShift) + 5703838Shsul@eecs.umich.edu VAddr(req->getVaddr()).offset()); 5713838Shsul@eecs.umich.edu 5723838Shsul@eecs.umich.edu if (write) { 5733838Shsul@eecs.umich.edu if (!(pte->xwe & MODE2MASK(mode))) { 5743838Shsul@eecs.umich.edu // declare the instruction access fault 5753838Shsul@eecs.umich.edu write_acv++; 5763838Shsul@eecs.umich.edu uint64_t flags = MM_STAT_WR_MASK | 5773838Shsul@eecs.umich.edu MM_STAT_ACV_MASK | 5783838Shsul@eecs.umich.edu (pte->fonw ? MM_STAT_FONW_MASK : 0); 5793838Shsul@eecs.umich.edu return new DtbPageFault(req->getVaddr(), req->getFlags(), flags); 5803838Shsul@eecs.umich.edu } 5813838Shsul@eecs.umich.edu if (pte->fonw) { 5823838Shsul@eecs.umich.edu write_acv++; 5833838Shsul@eecs.umich.edu uint64_t flags = MM_STAT_WR_MASK | 5843838Shsul@eecs.umich.edu MM_STAT_FONW_MASK; 5853838Shsul@eecs.umich.edu return new DtbPageFault(req->getVaddr(), req->getFlags(), flags); 5863838Shsul@eecs.umich.edu } 5873453Sgblack@eecs.umich.edu } else { 5883838Shsul@eecs.umich.edu if (!(pte->xre & MODE2MASK(mode))) { 5893838Shsul@eecs.umich.edu read_acv++; 5903838Shsul@eecs.umich.edu uint64_t flags = MM_STAT_ACV_MASK | 5913838Shsul@eecs.umich.edu (pte->fonr ? MM_STAT_FONR_MASK : 0); 5923838Shsul@eecs.umich.edu return new DtbAcvFault(req->getVaddr(), req->getFlags(), flags); 5933453Sgblack@eecs.umich.edu } 5943838Shsul@eecs.umich.edu if (pte->fonr) { 5953838Shsul@eecs.umich.edu read_acv++; 5963838Shsul@eecs.umich.edu uint64_t flags = MM_STAT_FONR_MASK; 5973838Shsul@eecs.umich.edu return new DtbPageFault(req->getVaddr(), req->getFlags(), flags); 5983453Sgblack@eecs.umich.edu } 5992SN/A } 6002SN/A } 601551SN/A 6023838Shsul@eecs.umich.edu if (write) 6033838Shsul@eecs.umich.edu write_hits++; 6043838Shsul@eecs.umich.edu else 6053838Shsul@eecs.umich.edu read_hits++; 6062SN/A } 6072SN/A 6083838Shsul@eecs.umich.edu // check that the physical address is ok (catch bad physical addresses) 6093838Shsul@eecs.umich.edu if (req->getPaddr() & ~PAddrImplMask) 6103838Shsul@eecs.umich.edu return genMachineCheckFault(); 611551SN/A 6123838Shsul@eecs.umich.edu return checkCacheability(req); 6133838Shsul@eecs.umich.edu} 6143453Sgblack@eecs.umich.edu 6153838Shsul@eecs.umich.eduPTE & 6163838Shsul@eecs.umich.eduTLB::index(bool advance) 6173838Shsul@eecs.umich.edu{ 6183838Shsul@eecs.umich.edu PTE *pte = &table[nlu]; 6193453Sgblack@eecs.umich.edu 6203838Shsul@eecs.umich.edu if (advance) 6213838Shsul@eecs.umich.edu nextnlu(); 6223453Sgblack@eecs.umich.edu 6233838Shsul@eecs.umich.edu return *pte; 6243838Shsul@eecs.umich.edu} 6253453Sgblack@eecs.umich.edu 6264088Sbinkertn@umich.edu/* end namespace AlphaISA */ } 6274088Sbinkertn@umich.edu 6284762Snate@binkert.orgAlphaISA::ITB * 6294762Snate@binkert.orgAlphaITBParams::create() 6303838Shsul@eecs.umich.edu{ 6314762Snate@binkert.org return new AlphaISA::ITB(name, size); 6323838Shsul@eecs.umich.edu} 6333453Sgblack@eecs.umich.edu 6344762Snate@binkert.orgAlphaISA::DTB * 6354762Snate@binkert.orgAlphaDTBParams::create() 6363838Shsul@eecs.umich.edu{ 6374762Snate@binkert.org return new AlphaISA::DTB(name, size); 6383838Shsul@eecs.umich.edu} 639