pagetable.cc revision 9111:f133ba654050 
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#include <cmath>
41#include "arch/x86/isa_traits.hh"
42#include "arch/x86/pagetable.hh"
43#include "sim/serialize.hh"
44
45namespace X86ISA
46{
47
48TlbEntry::TlbEntry(Addr asn, Addr _vaddr, Addr _paddr) :
49    paddr(_paddr), vaddr(_vaddr), logBytes(PageShift), writable(true),
50    user(true), uncacheable(false), global(false), patBit(0), noExec(false)
51{}
52
53void
54TlbEntry::serialize(std::ostream &os)
55{
56    SERIALIZE_SCALAR(paddr);
57    SERIALIZE_SCALAR(vaddr);
58    SERIALIZE_SCALAR(logBytes);
59    SERIALIZE_SCALAR(writable);
60    SERIALIZE_SCALAR(user);
61    SERIALIZE_SCALAR(uncacheable);
62    SERIALIZE_SCALAR(global);
63    SERIALIZE_SCALAR(patBit);
64    SERIALIZE_SCALAR(noExec);
65    SERIALIZE_SCALAR(lruSeq);
66}
67
68void
69TlbEntry::unserialize(Checkpoint *cp, const std::string &section)
70{
71    UNSERIALIZE_SCALAR(paddr);
72    UNSERIALIZE_SCALAR(vaddr);
73    //
74    // The logBytes scalar variable replaced the previous size variable.
75    // The following code maintains backwards compatibility with previous
76    // checkpoints using the old size variable.
77    //
78    if (UNSERIALIZE_OPT_SCALAR(logBytes) == false) {
79        int size;
80        UNSERIALIZE_SCALAR(size);
81        logBytes = log2(size);
82    }
83    UNSERIALIZE_SCALAR(writable);
84    UNSERIALIZE_SCALAR(user);
85    UNSERIALIZE_SCALAR(uncacheable);
86    UNSERIALIZE_SCALAR(global);
87    UNSERIALIZE_SCALAR(patBit);
88    UNSERIALIZE_SCALAR(noExec);
89    if (UNSERIALIZE_OPT_SCALAR(lruSeq) == false) {
90        lruSeq = 0;
91    }
92}
93
94}
95