tlb.hh revision 5894 
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 BaseTLB : public SimObject
43{
44  protected:
45    BaseTLB(const Params *p) : SimObject(p)
46    {}
47
48  public:
49    virtual void demapPage(Addr vaddr, uint64_t asn) = 0;
50
51    class Translation
52    {
53      public:
54        virtual ~Translation()
55        {}
56
57        /*
58         * The memory for this object may be dynamically allocated, and it may
59         * be responsible for cleaning itself up which will happen in this
60         * function. Once it's called, the object is no longer valid.
61         */
62        virtual void finish(Fault fault, RequestPtr req,
63                ThreadContext *tc, bool write=false) = 0;
64    };
65};
66
67class GenericTLB : public BaseTLB
68{
69  protected:
70    GenericTLB(const Params *p) : BaseTLB(p)
71    {}
72
73  public:
74    void demapPage(Addr vaddr, uint64_t asn);
75
76    Fault translateAtomic(RequestPtr req, ThreadContext *tc, bool=false);
77    void translateTiming(RequestPtr req, ThreadContext *tc,
78            Translation *translation, bool=false);
79};
80
81#endif // __ARCH_SPARC_TLB_HH__
82