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