135 lines
4.5 KiB
C++
135 lines
4.5 KiB
C++
/*
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* Copyright (c) 2003-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Gabe Black
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* Ali Saidi
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*/
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#include "arch/sparc/intregfile.hh"
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#include "base/trace.hh"
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#include "sim/serialize.hh"
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using namespace SparcISA;
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using namespace std;
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class Checkpoint;
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string SparcISA::getIntRegName(RegIndex index)
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{
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static std::string intRegName[NumIntRegs] =
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{"g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
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"o0", "o1", "o2", "o3", "o4", "o5", "o6", "o7",
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
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"i0", "i1", "i2", "i3", "i4", "i5", "i6", "i7"};
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return intRegName[index];
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}
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int IntRegFile::flattenIndex(int reg)
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{
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int flatIndex = offset[reg >> FrameOffsetBits]
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| (reg & FrameOffsetMask);
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DPRINTF(Sparc, "Flattened index %d into %d.\n", reg, flatIndex);
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return flatIndex;
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}
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void IntRegFile::clear()
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{
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int x;
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for (x = 0; x < MaxGL; x++)
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memset(regGlobals[x], 0, sizeof(IntReg) * RegsPerFrame);
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for(int x = 0; x < 2 * NWindows; x++)
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bzero(regSegments[x], sizeof(IntReg) * RegsPerFrame);
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}
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IntRegFile::IntRegFile()
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{
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offset[Globals] = 0;
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regView[Globals] = regGlobals[0];
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setCWP(0);
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clear();
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}
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IntReg IntRegFile::readReg(int intReg)
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{
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IntReg val =
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regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask];
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DPRINTF(Sparc, "Read register %d = 0x%x\n", intReg, val);
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return val;
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}
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Fault IntRegFile::setReg(int intReg, const IntReg &val)
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{
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if(intReg)
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{
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DPRINTF(Sparc, "Wrote register %d = 0x%x\n", intReg, val);
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regView[intReg >> FrameOffsetBits][intReg & FrameOffsetMask] = val;
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}
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return NoFault;
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}
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//This doesn't effect the actual CWP register.
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//It's purpose is to adjust the view of the register file
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//to what it would be if CWP = cwp.
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void IntRegFile::setCWP(int cwp)
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{
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int index = ((NWindows - cwp) % NWindows) * 2;
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offset[Outputs] = FrameOffset + (index * RegsPerFrame);
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offset[Locals] = FrameOffset + ((index+1) * RegsPerFrame);
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offset[Inputs] = FrameOffset +
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(((index+2) % (NWindows * 2)) * RegsPerFrame);
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regView[Outputs] = regSegments[index];
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regView[Locals] = regSegments[index+1];
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regView[Inputs] = regSegments[(index+2) % (NWindows * 2)];
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DPRINTF(Sparc, "Changed the CWP value to %d\n", cwp);
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}
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void IntRegFile::setGlobals(int gl)
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{
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DPRINTF(Sparc, "Now using %d globals", gl);
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regView[Globals] = regGlobals[gl];
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offset[Globals] = RegGlobalOffset + gl * RegsPerFrame;
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}
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void IntRegFile::serialize(std::ostream &os)
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{
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unsigned int x;
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for(x = 0; x < MaxGL; x++)
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SERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
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for(x = 0; x < 2 * NWindows; x++)
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SERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
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}
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void IntRegFile::unserialize(Checkpoint *cp, const std::string §ion)
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{
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unsigned int x;
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for(x = 0; x < MaxGL; x++)
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UNSERIALIZE_ARRAY(regGlobals[x], RegsPerFrame);
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for(unsigned int x = 0; x < 2 * NWindows; x++)
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UNSERIALIZE_ARRAY(regSegments[x], RegsPerFrame);
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}
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