src/arch/sparc/intregfile.cc

   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 #include "arch/sparc/intregfile.hh"
  33 #include "base/trace.hh"
  34 #include "base/misc.hh"
  35 #include "sim/serialize.hh"
  36
  37 #include <string.h>
  38
  39 using namespace SparcISA;
  40 using namespace std;
  41
  42 class Checkpoint;
  43
  44 string SparcISA::getIntRegName(RegIndex index)
  45 {
  46     static std::string intRegName[NumIntArchRegs] =
  47         {"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
  48          "o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
  49          "l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
  50          "i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7"};
  51     return intRegName[index];
  52 }
  53
  54 void IntRegFile::clear()
  55 {
  56     int x;
  57     for (x = 0; x < MaxGL; x++)
  58         memset(regGlobals[x], 0, sizeof(IntReg) * RegsPerFrame);
  59     for(int x = 0; x < 2 * NWindows; x++)
  60         memset(regSegments[x], 0, sizeof(IntReg) * RegsPerFrame);
  61     memset(regs, 0, sizeof(IntReg) * NumIntRegs);
  62 }
  63
  64 IntRegFile::IntRegFile()
  65 {
  66     offset[Globals] = 0;
  67     regView[Globals] = regGlobals[0];
  68     clear();
  69 }
  70
  71 IntReg IntRegFile::readReg(int intReg)
  72 {
  73     DPRINTF(IntRegs, "Read register %d = 0x%x\n", intReg, regs[intReg]);
  74     return regs[intReg];
  75     /* XXX Currently not used. When used again regView/offset need to be
  76      * serialized!
  77     IntReg val;
  78     if(intReg < NumIntArchRegs)
  79         val = regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask];
  80     else if((intReg -= NumIntArchRegs) < NumMicroIntRegs)
  81         val = microRegs[intReg];
  82     else
  83         panic("Tried to read non-existant integer register %d, %d\n",
  84                 NumIntArchRegs + NumMicroIntRegs + intReg, intReg);
  85
  86     DPRINTF(IntRegs, "Read register %d = 0x%x\n", intReg, val);
  87     return val;
  88     */
  89 }
  90
  91 void IntRegFile::setReg(int intReg, const IntReg &val)
  92 {
  93     if(intReg)
  94     {
  95         DPRINTF(IntRegs, "Wrote register %d = 0x%x\n", intReg, val);
  96         regs[intReg] = val;
  97     }
  98     return;
  99     /* XXX Currently not used. When used again regView/offset need to be
 100      * serialized!
 101     if(intReg)
 102     {
 103         DPRINTF(IntRegs, "Wrote register %d = 0x%x\n", intReg, val);
 104         if(intReg < NumIntArchRegs)
 105             regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask] = val;
 106         else if((intReg -= NumIntArchRegs) < NumMicroIntRegs)
 107             microRegs[intReg] = val;
 108         else
 109             panic("Tried to set non-existant integer register\n");
 110     } */
 111 }
 112
 113 void IntRegFile::serialize(std::ostream &os)
 114 {
 115     SERIALIZE_ARRAY(regs, NumIntRegs);
 116     SERIALIZE_ARRAY(microRegs, NumMicroIntRegs);
 117
 118     /* the below doesn't seem needed unless gabe makes regview work*/
 119     unsigned int x;
 120     for(x = 0; x < MaxGL; x++)
 121         SERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
 122     for(x = 0; x < 2 * NWindows; x++)
 123         SERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
 124 }
 125
 126 void IntRegFile::unserialize(Checkpoint *cp, const std::string &section)
 127 {
 128     UNSERIALIZE_ARRAY(regs, NumIntRegs);
 129     UNSERIALIZE_ARRAY(microRegs, NumMicroIntRegs);
 130
 131     /* the below doesn't seem needed unless gabe makes regview work*/
 132     unsigned int x;
 133     for(x = 0; x < MaxGL; x++)
 134         UNSERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
 135     for(unsigned int x = 0; x < 2 * NWindows; x++)
 136         UNSERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
 137 }