microcode_rom.hh

Go to the documentation of this file.

/*
 * 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
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * 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 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;
 
}
 
 
#endif // __ARCH_X86_MICROCODE_ROM_HH__