tlb.cc revision 5184:8782de2949e5 
1/*
2 * Copyright (c) 2001-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Gabe Black
29 */
30
31#include <cstring>
32
33#include "arch/mips/tlb.hh"
34
35namespace MipsISA {
36    Fault
37    TLB::translate(RequestPtr req, ThreadContext *tc, bool)
38    {
39        Fault fault = GenericTLB::translate(req, tc);
40        if (fault != NoFault)
41            return fault;
42
43        typeof(req->getSize()) size = req->getSize();
44        Addr paddr = req->getPaddr();
45
46        if (!isPowerOf2(size))
47            panic("Invalid request size!\n");
48        if ((size - 1) & paddr)
49            return new GenericAlignmentFault(paddr);
50
51        return NoFault;
52    }
53
54    void
55    TlbEntry::serialize(std::ostream &os)
56    {
57        SERIALIZE_SCALAR(_pageStart);
58    }
59
60    void
61    TlbEntry::unserialize(Checkpoint *cp, const std::string &section)
62    {
63        UNSERIALIZE_SCALAR(_pageStart);
64    }
65};
66
67MipsISA::ITB *
68MipsITBParams::create()
69{
70    return new MipsISA::ITB(this);
71}
72
73MipsISA::DTB *
74MipsDTBParams::create()
75{
76    return new MipsISA::DTB(this);
77}
78