tlb.hh revision 5895:569e3b31a868
1/* 2 * Copyright (c) 2007 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * Redistribution and use of this software in source and binary forms, 6 * with or without modification, are permitted provided that the 7 * following conditions are met: 8 * 9 * The software must be used only for Non-Commercial Use which means any 10 * use which is NOT directed to receiving any direct monetary 11 * compensation for, or commercial advantage from such use. Illustrative 12 * examples of non-commercial use are academic research, personal study, 13 * teaching, education and corporate research & development. 14 * Illustrative examples of commercial use are distributing products for 15 * commercial advantage and providing services using the software for 16 * commercial advantage. 17 * 18 * If you wish to use this software or functionality therein that may be 19 * covered by patents for commercial use, please contact: 20 * Director of Intellectual Property Licensing 21 * Office of Strategy and Technology 22 * Hewlett-Packard Company 23 * 1501 Page Mill Road 24 * Palo Alto, California 94304 25 * 26 * Redistributions of source code must retain the above copyright notice, 27 * this list of conditions and the following disclaimer. Redistributions 28 * in binary form must reproduce the above copyright notice, this list of 29 * conditions and the following disclaimer in the documentation and/or 30 * other materials provided with the distribution. Neither the name of 31 * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its 32 * contributors may be used to endorse or promote products derived from 33 * this software without specific prior written permission. No right of 34 * sublicense is granted herewith. Derivatives of the software and 35 * output created using the software may be prepared, but only for 36 * Non-Commercial Uses. Derivatives of the software may be shared with 37 * others provided: (i) the others agree to abide by the list of 38 * conditions herein which includes the Non-Commercial Use restrictions; 39 * and (ii) such Derivatives of the software include the above copyright 40 * notice to acknowledge the contribution from this software where 41 * applicable, this list of conditions and the disclaimer below. 42 * 43 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 44 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 45 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 46 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 47 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 49 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 50 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 51 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 52 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 * 55 * Authors: Gabe Black 56 */ 57 58#ifndef __ARCH_X86_TLB_HH__ 59#define __ARCH_X86_TLB_HH__ 60 61#include <list> 62#include <vector> 63#include <string> 64 65#include "arch/x86/pagetable.hh" 66#include "arch/x86/segmentregs.hh" 67#include "config/full_system.hh" 68#include "mem/mem_object.hh" 69#include "mem/request.hh" 70#include "params/X86DTB.hh" 71#include "params/X86ITB.hh" 72#include "sim/faults.hh" 73#include "sim/tlb.hh" 74#include "sim/sim_object.hh" 75 76class ThreadContext; 77class Packet; 78 79namespace X86ISA 80{ 81 class Walker; 82 83 static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS; 84 85 class TLB; 86 87 class TLB : public BaseTLB 88 { 89 protected: 90 friend class Walker; 91 92 typedef std::list<TlbEntry *> EntryList; 93 94 bool _allowNX; 95 uint32_t configAddress; 96 97 public: 98 bool allowNX() const 99 { 100 return _allowNX; 101 } 102 103 typedef X86TLBParams Params; 104 TLB(const Params *p); 105 106 void dumpAll(); 107 108 TlbEntry *lookup(Addr va, bool update_lru = true); 109 110 void setConfigAddress(uint32_t addr); 111 112 protected: 113 114 EntryList::iterator lookupIt(Addr va, bool update_lru = true); 115 116#if FULL_SYSTEM 117 protected: 118 119 Walker * walker; 120#endif 121 122 public: 123 void invalidateAll(); 124 125 void invalidateNonGlobal(); 126 127 void demapPage(Addr va, uint64_t asn); 128 129 protected: 130 int size; 131 132 TlbEntry * tlb; 133 134 EntryList freeList; 135 EntryList entryList; 136 137 Fault translate(RequestPtr req, ThreadContext *tc, 138 Translation *translation, bool write, bool execute, 139 bool &delayedResponse, bool timing); 140 141 public: 142 143 TlbEntry * insert(Addr vpn, TlbEntry &entry); 144 145 // Checkpointing 146 virtual void serialize(std::ostream &os); 147 virtual void unserialize(Checkpoint *cp, const std::string §ion); 148 }; 149 150 class ITB : public TLB 151 { 152 public: 153 typedef X86ITBParams Params; 154 ITB(const Params *p) : TLB(p) 155 { 156 _allowNX = false; 157 } 158 159 Fault translateAtomic(RequestPtr req, ThreadContext *tc); 160 void translateTiming(RequestPtr req, ThreadContext *tc, 161 Translation *translation); 162 163 friend class DTB; 164 }; 165 166 class DTB : public TLB 167 { 168 public: 169 typedef X86DTBParams Params; 170 DTB(const Params *p) : TLB(p) 171 { 172 _allowNX = true; 173 } 174 Fault translateAtomic(RequestPtr req, ThreadContext *tc, bool write); 175 void translateTiming(RequestPtr req, ThreadContext *tc, 176 Translation *translation, bool write); 177#if FULL_SYSTEM 178 Tick doMmuRegRead(ThreadContext *tc, Packet *pkt); 179 Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt); 180#endif 181 182 // Checkpointing 183 virtual void serialize(std::ostream &os); 184 virtual void unserialize(Checkpoint *cp, const std::string §ion); 185 }; 186} 187 188#endif // __ARCH_X86_TLB_HH__ 189