pagetable.hh revision 7399 
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: Nathan Binkert
41 *          Steve Reinhardt
42 *          Ali Saidi
43 */
44
45#ifndef __ARCH_ARM_PAGETABLE_H__
46#define __ARCH_ARM_PAGETABLE_H__
47
48#include "arch/arm/isa_traits.hh"
49#include "arch/arm/utility.hh"
50#include "arch/arm/vtophys.hh"
51#include "config/full_system.hh"
52
53namespace ArmISA {
54
55struct VAddr
56{
57    VAddr(Addr a) { panic("not implemented yet."); }
58};
59
60
61// ITB/DTB page table entry
62struct PTE
63{
64    void serialize(std::ostream &os)
65    {
66        panic("Need to implement PTE serialization\n");
67    }
68
69    void unserialize(Checkpoint *cp, const std::string &section)
70    {
71        panic("Need to implement PTE serialization\n");
72    }
73
74};
75
76// ITB/DTB table entry
77struct TlbEntry
78{
79    Addr tag;               // virtual page number tag
80    Addr ppn;               // physical page number
81    uint8_t asn;            // address space number
82    bool valid;             // valid page table entry
83
84
85    //Construct an entry that maps to physical address addr.
86    TlbEntry(Addr _asn, Addr _vaddr, Addr _paddr)
87    {
88        tag = _vaddr >> PageShift;
89        ppn = _paddr >> PageShift;
90        asn = _asn;
91        valid = true;
92    }
93
94    TlbEntry()
95    {}
96
97    void
98    updateVaddr(Addr new_vaddr)
99    {
100        tag = new_vaddr >> PageShift;
101    }
102
103    Addr
104    pageStart()
105    {
106        return ppn << PageShift;
107    }
108
109    void serialize(std::ostream &os);
110    void unserialize(Checkpoint *cp, const std::string &section);
111};
112
113
114
115};
116#endif // __ARCH_ARM_PAGETABLE_H__
117
118