tlb.hh revision 5004 
1/*
2 * Copyright (c) 2006 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#ifndef __SIM_TLB_HH__
32#define __SIM_TLB_HH__
33
34#include "base/misc.hh"
35#include "mem/request.hh"
36#include "sim/faults.hh"
37#include "sim/sim_object.hh"
38
39class ThreadContext;
40class Packet;
41
42class GenericTLBBase : public SimObject
43{
44  protected:
45    GenericTLBBase(const std::string &name) : SimObject(name)
46    {}
47
48    Fault translate(RequestPtr req, ThreadContext *tc);
49};
50
51template <bool doSizeCheck=true, bool doAlignmentCheck=true>
52class GenericTLB : public GenericTLBBase
53{
54  public:
55    GenericTLB(const std::string &name) : GenericTLBBase(name)
56    {}
57
58    Fault translate(RequestPtr req, ThreadContext *tc, bool=false)
59    {
60        Fault fault = GenericTLBBase::translate(req, tc);
61        if (fault != NoFault)
62            return fault;
63
64        typeof(req->getSize()) size = req->getSize();
65        Addr paddr = req->getPaddr();
66
67        if(doSizeCheck && !isPowerOf2(size))
68            panic("Invalid request size!\n");
69        if (doAlignmentCheck && ((size - 1) & paddr))
70            return Fault(new GenericAlignmentFault(paddr));
71
72        return NoFault;
73    }
74};
75
76template <bool doSizeCheck=true, bool doAlignmentCheck=true>
77class GenericITB : public GenericTLB<doSizeCheck, doAlignmentCheck>
78{
79  public:
80    GenericITB(const std::string &name) :
81        GenericTLB<doSizeCheck, doAlignmentCheck>(name)
82    {}
83};
84
85template <bool doSizeCheck=true, bool doAlignmentCheck=true>
86class GenericDTB : public GenericTLB<doSizeCheck, doAlignmentCheck>
87{
88  public:
89    GenericDTB(const std::string &name) :
90        GenericTLB<doSizeCheck, doAlignmentCheck>(name)
91    {}
92};
93
94#endif // __ARCH_SPARC_TLB_HH__
95