src/arch/sparc/intregfile.hh

   1 /*
   2  * Copyright (c) 2003-2005 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  *          Ali Saidi
  30  */
  31
  32 #ifndef __ARCH_SPARC_INTREGFILE_HH__
  33 #define __ARCH_SPARC_INTREGFILE_HH__
  34
  35 #include "arch/sparc/isa_traits.hh"
  36 #include "arch/sparc/types.hh"
  37
  38 #include <string>
  39
  40 class Checkpoint;
  41
  42 namespace SparcISA
  43 {
  44     class RegFile;
  45
  46     //This function translates integer register file indices into names
  47     std::string getIntRegName(RegIndex);
  48
  49     const int NumIntArchRegs = 32;
  50     const int NumIntRegs = MaxGL * 8 + NWindows * 16 + NumMicroIntRegs;
  51
  52     class IntRegFile
  53     {
  54       private:
  55         friend class RegFile;
  56       protected:
  57         static const int FrameOffsetBits = 3;
  58         static const int FrameNumBits = 2;
  59
  60         static const int RegsPerFrame = 1 << FrameOffsetBits;
  61         static const int FrameNumMask =
  62                 (FrameNumBits == sizeof(int)) ?
  63                 (unsigned int)(-1) :
  64                 (1 << FrameNumBits) - 1;
  65         static const int FrameOffsetMask =
  66                 (FrameOffsetBits == sizeof(int)) ?
  67                 (unsigned int)(-1) :
  68                 (1 << FrameOffsetBits) - 1;
  69
  70         IntReg regGlobals[MaxGL+1][RegsPerFrame];
  71         IntReg regSegments[2 * NWindows][RegsPerFrame];
  72         IntReg microRegs[NumMicroIntRegs];
  73
  74         enum regFrame {Globals, Outputs, Locals, Inputs, NumFrames};
  75
  76         IntReg * regView[NumFrames];
  77
  78         static const int RegGlobalOffset = 0;
  79         static const int FrameOffset = MaxGL * RegsPerFrame;
  80         int offset[NumFrames];
  81
  82       public:
  83
  84         int flattenIndex(int reg);
  85
  86         void clear();
  87
  88         IntRegFile();
  89
  90         IntReg readReg(int intReg);
  91
  92         void setReg(int intReg, const IntReg &val);
  93
  94         void serialize(std::ostream &os);
  95
  96         void unserialize(Checkpoint *cp, const std::string &section);
  97
  98       protected:
  99         //This doesn't effect the actual CWP register.
 100         //It's purpose is to adjust the view of the register file
 101         //to what it would be if CWP = cwp.
 102         void setCWP(int cwp);
 103
 104         void setGlobals(int gl);
 105     };
 106 }
 107
 108 #endif