pagetable.hh revision 8229:78bf55f23338 
1/*
2 * Copyright (c) 2010 ARM Limited
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 * Copyright (c) 2002-2005 The Regents of The University of Michigan
15 * All rights reserved.
16 *
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions are
19 * met: redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer;
21 * redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution;
24 * neither the name of the copyright holders nor the names of its
25 * contributors may be used to endorse or promote products derived from
26 * this software without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
29 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
30 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
31 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
32 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
33 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
34 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
35 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
36 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
37 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
38 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 *
40 * Authors: Ali Saidi
41 */
42
43#ifndef __ARCH_ARM_PAGETABLE_H__
44#define __ARCH_ARM_PAGETABLE_H__
45
46#include "arch/arm/isa_traits.hh"
47#include "arch/arm/utility.hh"
48#include "arch/arm/vtophys.hh"
49#include "config/full_system.hh"
50#include "sim/serialize.hh"
51
52namespace ArmISA {
53
54struct VAddr
55{
56    VAddr(Addr a) { panic("not implemented yet."); }
57};
58
59
60// ITB/DTB page table entry
61struct PTE
62{
63    void serialize(std::ostream &os)
64    {
65        panic("Need to implement PTE serialization\n");
66    }
67
68    void unserialize(Checkpoint *cp, const std::string &section)
69    {
70        panic("Need to implement PTE serialization\n");
71    }
72
73};
74
75// ITB/DTB table entry
76struct TlbEntry
77{
78  public:
79    enum MemoryType {
80        StronglyOrdered,
81        Device,
82        Normal
83    };
84    enum DomainType {
85        DomainNoAccess = 0,
86        DomainClient,
87        DomainReserved,
88        DomainManager
89    };
90
91    // Matching variables
92    Addr pfn;
93    Addr size;              // Size of this entry, == Type of TLB Rec
94    Addr vpn;               // Virtual Page Number
95    uint32_t asid;          // Address Space Identifier
96    uint8_t N;              // Number of bits in pagesize
97    bool global;
98    bool valid;
99
100    // Type of memory
101    bool nonCacheable;     // Can we wrap this in mtype?
102    bool sNp;      // Section descriptor
103
104    // Memory Attributes
105    MemoryType mtype;
106    uint8_t innerAttrs;
107    uint8_t outerAttrs;
108    bool shareable;
109    uint32_t attributes;    // Memory attributes formatted for PAR
110
111
112    // Access permissions
113    bool xn;                // Execute Never
114    uint8_t ap;           // Access permissions bits
115    uint8_t domain;       // Access Domain
116
117    //Construct an entry that maps to physical address addr for SE mode
118    TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr)
119    {
120        pfn = _paddr >> PageShift;
121        size = PageBytes - 1;
122        asid = _asn;
123        global = false;
124        valid = true;
125
126        vpn = _vaddr >> PageShift;
127
128        nonCacheable = sNp = false;
129
130        xn = 0;
131        ap = 0; // ???
132        domain = DomainClient; //???
133    }
134
135    TlbEntry()
136    {}
137
138    void
139    updateVaddr(Addr new_vaddr)
140    {
141        vpn = new_vaddr >> PageShift;
142    }
143
144    Addr
145    pageStart()
146    {
147        return pfn << PageShift;
148    }
149
150    bool
151    match(Addr va, uint8_t cid)
152    {
153        Addr v = vpn << N;
154        if (valid && va >= v && va <= v + size && (global || cid == asid))
155            return true;
156        return false;
157    }
158
159    Addr
160    pAddr(Addr va)
161    {
162        return (pfn << N) | (va & size);
163    }
164
165    void
166    serialize(std::ostream &os)
167    {
168        SERIALIZE_SCALAR(pfn);
169        SERIALIZE_SCALAR(size);
170        SERIALIZE_SCALAR(vpn);
171        SERIALIZE_SCALAR(asid);
172        SERIALIZE_SCALAR(N);
173        SERIALIZE_SCALAR(global);
174        SERIALIZE_SCALAR(valid);
175        SERIALIZE_SCALAR(nonCacheable);
176        SERIALIZE_SCALAR(sNp);
177        SERIALIZE_ENUM(mtype);
178        SERIALIZE_SCALAR(innerAttrs);
179        SERIALIZE_SCALAR(outerAttrs);
180        SERIALIZE_SCALAR(shareable);
181        SERIALIZE_SCALAR(attributes);
182        SERIALIZE_SCALAR(xn);
183        SERIALIZE_SCALAR(ap);
184        SERIALIZE_SCALAR(domain);
185    }
186    void
187    unserialize(Checkpoint *cp, const std::string &section)
188    {
189        UNSERIALIZE_SCALAR(pfn);
190        UNSERIALIZE_SCALAR(size);
191        UNSERIALIZE_SCALAR(vpn);
192        UNSERIALIZE_SCALAR(asid);
193        UNSERIALIZE_SCALAR(N);
194        UNSERIALIZE_SCALAR(global);
195        UNSERIALIZE_SCALAR(valid);
196        UNSERIALIZE_SCALAR(nonCacheable);
197        UNSERIALIZE_SCALAR(sNp);
198        UNSERIALIZE_ENUM(mtype);
199        UNSERIALIZE_SCALAR(innerAttrs);
200        UNSERIALIZE_SCALAR(outerAttrs);
201        UNSERIALIZE_SCALAR(shareable);
202        UNSERIALIZE_SCALAR(attributes);
203        UNSERIALIZE_SCALAR(xn);
204        UNSERIALIZE_SCALAR(ap);
205        UNSERIALIZE_SCALAR(domain);
206    }
207
208};
209
210
211
212};
213#endif // __ARCH_ARM_PAGETABLE_H__
214
215