tlb.hh revision 5881:73c0aaaaf186 
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 FakeITLBFault;
91        friend class FakeDTLBFault;
92
93        typedef std::list<TlbEntry *> EntryList;
94
95        bool _allowNX;
96        uint32_t configAddress;
97
98      public:
99        bool allowNX() const
100        {
101            return _allowNX;
102        }
103
104        typedef X86TLBParams Params;
105        TLB(const Params *p);
106
107        void dumpAll();
108
109        TlbEntry *lookup(Addr va, bool update_lru = true);
110
111        void setConfigAddress(uint32_t addr);
112
113      protected:
114
115        EntryList::iterator lookupIt(Addr va, bool update_lru = true);
116
117#if FULL_SYSTEM
118      protected:
119
120        Walker * walker;
121
122        void walk(ThreadContext * _tc, Addr vaddr, bool write, bool execute);
123#endif
124
125      public:
126        void invalidateAll();
127
128        void invalidateNonGlobal();
129
130        void demapPage(Addr va, uint64_t asn);
131
132      protected:
133        int size;
134
135        TlbEntry * tlb;
136
137        EntryList freeList;
138        EntryList entryList;
139
140        template<class TlbFault>
141        Fault translate(RequestPtr &req, ThreadContext *tc,
142                bool write, bool execute);
143
144      public:
145
146        void insert(Addr vpn, TlbEntry &entry);
147
148        // Checkpointing
149        virtual void serialize(std::ostream &os);
150        virtual void unserialize(Checkpoint *cp, const std::string &section);
151    };
152
153    class ITB : public TLB
154    {
155      public:
156        typedef X86ITBParams Params;
157        ITB(const Params *p) : TLB(p)
158        {
159            _allowNX = false;
160        }
161
162        Fault translate(RequestPtr &req, ThreadContext *tc);
163
164        friend class DTB;
165    };
166
167    class DTB : public TLB
168    {
169      public:
170        typedef X86DTBParams Params;
171        DTB(const Params *p) : TLB(p)
172        {
173            _allowNX = true;
174        }
175        Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
176#if FULL_SYSTEM
177        Tick doMmuRegRead(ThreadContext *tc, Packet *pkt);
178        Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt);
179#endif
180
181        // Checkpointing
182        virtual void serialize(std::ostream &os);
183        virtual void unserialize(Checkpoint *cp, const std::string &section);
184    };
185}
186
187#endif // __ARCH_X86_TLB_HH__
188