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