tlb.hh revision 10463
1/* 2 * Copyright (c) 2007 The Hewlett-Packard Development Company 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions are 16 * met: redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer; 18 * redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution; 21 * neither the name of the copyright holders nor the names of its 22 * contributors may be used to endorse or promote products derived from 23 * this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 26 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 27 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 28 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 29 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 30 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 31 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 35 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 * 37 * Authors: Gabe Black 38 */ 39 40#ifndef __ARCH_X86_TLB_HH__ 41#define __ARCH_X86_TLB_HH__ 42 43#include <list> 44#include <string> 45#include <vector> 46 47#include "arch/x86/regs/segment.hh" 48#include "arch/x86/pagetable.hh" 49#include "base/trie.hh" 50#include "mem/mem_object.hh" 51#include "mem/request.hh" 52#include "params/X86TLB.hh" 53#include "sim/fault_fwd.hh" 54#include "sim/sim_object.hh" 55#include "sim/tlb.hh" 56 57class ThreadContext; 58class Packet; 59 60namespace X86ISA 61{ 62 class Walker; 63 64 class TLB : public BaseTLB 65 { 66 protected: 67 friend class Walker; 68 69 typedef std::list<TlbEntry *> EntryList; 70 71 uint32_t configAddress; 72 73 public: 74 75 typedef X86TLBParams Params; 76 TLB(const Params *p); 77 78 void takeOverFrom(BaseTLB *otlb) {} 79 80 TlbEntry *lookup(Addr va, bool update_lru = true); 81 82 void setConfigAddress(uint32_t addr); 83 84 protected: 85 86 EntryList::iterator lookupIt(Addr va, bool update_lru = true); 87 88 Walker * walker; 89 90 public: 91 Walker *getWalker(); 92 93 void flushAll(); 94 95 void flushNonGlobal(); 96 97 void demapPage(Addr va, uint64_t asn); 98 99 protected: 100 uint32_t size; 101 102 TlbEntry * tlb; 103 104 EntryList freeList; 105 106 TlbEntryTrie trie; 107 uint64_t lruSeq; 108 109 Fault translateInt(RequestPtr req, ThreadContext *tc); 110 111 Fault translate(RequestPtr req, ThreadContext *tc, 112 Translation *translation, Mode mode, 113 bool &delayedResponse, bool timing); 114 115 public: 116 117 void evictLRU(); 118 119 uint64_t 120 nextSeq() 121 { 122 return ++lruSeq; 123 } 124 125 Fault translateAtomic(RequestPtr req, ThreadContext *tc, Mode mode); 126 void translateTiming(RequestPtr req, ThreadContext *tc, 127 Translation *translation, Mode mode); 128 /** Stub function for compilation support of CheckerCPU. x86 ISA does 129 * not support Checker model at the moment 130 */ 131 Fault translateFunctional(RequestPtr req, ThreadContext *tc, Mode mode); 132 133 /** 134 * Do post-translation physical address finalization. 135 * 136 * Some addresses, for example requests going to the APIC, 137 * need post-translation updates. Such physical addresses are 138 * remapped into a "magic" part of the physical address space 139 * by this method. 140 * 141 * @param req Request to updated in-place. 142 * @param tc Thread context that created the request. 143 * @param mode Request type (read/write/execute). 144 * @return A fault on failure, NoFault otherwise. 145 */ 146 Fault finalizePhysical(RequestPtr req, ThreadContext *tc, 147 Mode mode) const; 148 149 TlbEntry * insert(Addr vpn, TlbEntry &entry); 150 151 // Checkpointing 152 virtual void serialize(std::ostream &os); 153 virtual void unserialize(Checkpoint *cp, const std::string §ion); 154 155 /** 156 * Get the table walker master port. This is used for 157 * migrating port connections during a CPU takeOverFrom() 158 * call. For architectures that do not have a table walker, 159 * NULL is returned, hence the use of a pointer rather than a 160 * reference. For X86 this method will always return a valid 161 * port pointer. 162 * 163 * @return A pointer to the walker master port 164 */ 165 virtual BaseMasterPort *getMasterPort(); 166 }; 167} 168 169#endif // __ARCH_X86_TLB_HH__ 170