1/*
2 * Copyright (c) 2008 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 __ARCH_X86_MICROCODE_ROM_HH__
32#define __ARCH_X86_MICROCODE_ROM_HH__
33
34#include "arch/x86/insts/badmicroop.hh"
35#include "arch/x86/emulenv.hh"
36#include "cpu/static_inst.hh"
37
38namespace X86ISAInst
39{
40    class MicrocodeRom
41    {
42      protected:
43
44        typedef StaticInstPtr (*GenFunc)(StaticInstPtr);
45
46        static const MicroPC numMicroops;
47
48        GenFunc * genFuncs;
49
50      public:
51        //Constructor.
52        MicrocodeRom();
53
54        //Destructor.
55        ~MicrocodeRom()
56        {
57            delete [] genFuncs;
58        }
59
60        StaticInstPtr
61        fetchMicroop(MicroPC microPC, StaticInstPtr curMacroop)
62        {
63            microPC = normalMicroPC(microPC);
64            if (microPC >= numMicroops)
65                return X86ISA::badMicroop;
66            else
67                return genFuncs[microPC](curMacroop);
68        }
69    };
70}
71
72namespace X86ISA
73{
74    using X86ISAInst::MicrocodeRom;
75}
76
77#endif // __ARCH_X86_MICROCODE_ROM_HH__
78