src/arch/x86/microcode_rom.hh

   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
  38 namespace 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
  72 namespace X86ISA
  73 {
  74     using X86ISAInst::MicrocodeRom;
  75 }
  76
  77 #endif // __ARCH_X86_MICROCODE_ROM_HH__