tlb.hh revision 5245:d94bb8af9f76 
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/sim_object.hh"
74
75class ThreadContext;
76class Packet;
77
78namespace X86ISA
79{
80    class Walker;
81
82    static const unsigned StoreCheck = 1 << NUM_SEGMENTREGS;
83
84    class TLB;
85
86    class TLB : public SimObject
87    {
88      protected:
89        friend class FakeITLBFault;
90        friend class FakeDTLBFault;
91
92        bool _allowNX;
93
94      public:
95        bool allowNX() const
96        {
97            return _allowNX;
98        }
99
100        typedef X86TLBParams Params;
101        TLB(const Params *p);
102
103        void dumpAll();
104
105        TlbEntry *lookup(Addr va, bool update_lru = true);
106
107#if FULL_SYSTEM
108      protected:
109
110        Walker * walker;
111
112        void walk(ThreadContext * _tc, Addr vaddr);
113#endif
114
115      public:
116        void invalidateAll();
117
118        void invalidateNonGlobal();
119
120        void demapPage(Addr va);
121
122      protected:
123        int size;
124
125        TlbEntry * tlb;
126
127        typedef std::list<TlbEntry *> EntryList;
128        EntryList freeList;
129        EntryList entryList;
130
131        template<class TlbFault>
132        Fault translate(RequestPtr &req, ThreadContext *tc,
133                bool write, bool execute);
134
135      public:
136
137        void insert(Addr vpn, TlbEntry &entry);
138
139        // Checkpointing
140        virtual void serialize(std::ostream &os);
141        virtual void unserialize(Checkpoint *cp, const std::string &section);
142    };
143
144    class ITB : public TLB
145    {
146      public:
147        typedef X86ITBParams Params;
148        ITB(const Params *p) : TLB(p)
149        {
150            _allowNX = false;
151        }
152
153        Fault translate(RequestPtr &req, ThreadContext *tc);
154
155        friend class DTB;
156    };
157
158    class DTB : public TLB
159    {
160      public:
161        typedef X86DTBParams Params;
162        DTB(const Params *p) : TLB(p)
163        {
164            _allowNX = true;
165        }
166        Fault translate(RequestPtr &req, ThreadContext *tc, bool write);
167#if FULL_SYSTEM
168        Tick doMmuRegRead(ThreadContext *tc, Packet *pkt);
169        Tick doMmuRegWrite(ThreadContext *tc, Packet *pkt);
170#endif
171
172        // Checkpointing
173        virtual void serialize(std::ostream &os);
174        virtual void unserialize(Checkpoint *cp, const std::string &section);
175    };
176}
177
178#endif // __ARCH_X86_TLB_HH__
179