src/arch/x86/microcode_rom.hh

/*
 * Copyright (c) 2008 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef __ARCH_X86_MICROCODE_ROM_HH__
#define __ARCH_X86_MICROCODE_ROM_HH__

#include "arch/x86/insts/badmicroop.hh"
#include "arch/x86/emulenv.hh"
#include "cpu/static_inst.hh"

namespace gem5
{

namespace X86ISAInst
{

class MicrocodeRom
{
  protected:

    typedef StaticInstPtr (*GenFunc)(StaticInstPtr);

    static const MicroPC numMicroops;

    GenFunc *genFuncs;

  public:
    //Constructor.
    MicrocodeRom();

    //Destructor.
    ~MicrocodeRom()
    {
        delete [] genFuncs;
    }

    StaticInstPtr
    fetchMicroop(MicroPC microPC, StaticInstPtr curMacroop)
    {
        microPC = normalMicroPC(microPC);
        if (microPC >= numMicroops)
            return X86ISA::badMicroop;
        else
            return genFuncs[microPC](curMacroop);
    }
};

} // namespace X86ISAInst

namespace X86ISA
{

using X86ISAInst::MicrocodeRom;

} // namespace X86ISA
} // namespace gem5

#endif // __ARCH_X86_MICROCODE_ROM_HH__