src/arch/x86/regfile.cc

   1 /*
   2  * Copyright (c) 2003-2006 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  */
  30
  31 /*
  32  * Copyright (c) 2007 The Hewlett-Packard Development Company
  33  * All rights reserved.
  34  *
  35  * Redistribution and use of this software in source and binary forms,
  36  * with or without modification, are permitted provided that the
  37  * following conditions are met:
  38  *
  39  * The software must be used only for Non-Commercial Use which means any
  40  * use which is NOT directed to receiving any direct monetary
  41  * compensation for, or commercial advantage from such use.  Illustrative
  42  * examples of non-commercial use are academic research, personal study,
  43  * teaching, education and corporate research & development.
  44  * Illustrative examples of commercial use are distributing products for
  45  * commercial advantage and providing services using the software for
  46  * commercial advantage.
  47  *
  48  * If you wish to use this software or functionality therein that may be
  49  * covered by patents for commercial use, please contact:
  50  *     Director of Intellectual Property Licensing
  51  *     Office of Strategy and Technology
  52  *     Hewlett-Packard Company
  53  *     1501 Page Mill Road
  54  *     Palo Alto, California  94304
  55  *
  56  * Redistributions of source code must retain the above copyright notice,
  57  * this list of conditions and the following disclaimer.  Redistributions
  58  * in binary form must reproduce the above copyright notice, this list of
  59  * conditions and the following disclaimer in the documentation and/or
  60  * other materials provided with the distribution.  Neither the name of
  61  * the COPYRIGHT HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
  62  * contributors may be used to endorse or promote products derived from
  63  * this software without specific prior written permission.  No right of
  64  * sublicense is granted herewith.  Derivatives of the software and
  65  * output created using the software may be prepared, but only for
  66  * Non-Commercial Uses.  Derivatives of the software may be shared with
  67  * others provided: (i) the others agree to abide by the list of
  68  * conditions herein which includes the Non-Commercial Use restrictions;
  69  * and (ii) such Derivatives of the software include the above copyright
  70  * notice to acknowledge the contribution from this software where
  71  * applicable, this list of conditions and the disclaimer below.
  72  *
  73  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  74  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  75  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  76  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  77  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  78  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  79  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  80  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  81  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  82  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  83  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  84  *
  85  * Authors: Gabe Black
  86  */
  87
  88 #include "arch/x86/regfile.hh"
  89 #include "base/trace.hh"
  90 #include "sim/serialize.hh"
  91 #include "cpu/thread_context.hh"
  92
  93 class Checkpoint;
  94
  95 using namespace X86ISA;
  96 using namespace std;
  97
  98 //RegFile class methods
  99 Addr RegFile::readPC()
 100 {
 101     return rip;
 102 }
 103
 104 void RegFile::setPC(Addr val)
 105 {
 106     rip = val;
 107 }
 108
 109 Addr RegFile::readNextPC()
 110 {
 111     return nextRip;
 112 }
 113
 114 void RegFile::setNextPC(Addr val)
 115 {
 116     nextRip = val;
 117 }
 118
 119 Addr RegFile::readNextNPC()
 120 {
 121     //There's no way to know how big the -next- instruction will be.
 122     return nextRip + 1;
 123 }
 124
 125 void RegFile::setNextNPC(Addr val)
 126 { }
 127
 128 void RegFile::clear()
 129 {
 130     floatRegFile.clear();
 131     intRegFile.clear();
 132     miscRegFile.clear();
 133 }
 134
 135 MiscReg RegFile::readMiscRegNoEffect(int miscReg)
 136 {
 137     return miscRegFile.readRegNoEffect(miscReg);
 138 }
 139
 140 MiscReg RegFile::readMiscReg(int miscReg, ThreadContext *tc)
 141 {
 142     return miscRegFile.readReg(miscReg, tc);
 143 }
 144
 145 void RegFile::setMiscRegNoEffect(int miscReg, const MiscReg &val)
 146 {
 147     miscRegFile.setRegNoEffect(miscReg, val);
 148 }
 149
 150 void RegFile::setMiscReg(int miscReg, const MiscReg &val,
 151         ThreadContext * tc)
 152 {
 153     miscRegFile.setReg(miscReg, val, tc);
 154 }
 155
 156 FloatReg RegFile::readFloatReg(int floatReg, int width)
 157 {
 158     return floatRegFile.readReg(floatReg, width);
 159 }
 160
 161 FloatReg RegFile::readFloatReg(int floatReg)
 162 {
 163     //Use the "natural" width of a single float
 164     return floatRegFile.readReg(floatReg, FloatRegFile::SingleWidth);
 165 }
 166
 167 FloatRegBits RegFile::readFloatRegBits(int floatReg, int width)
 168 {
 169     return floatRegFile.readRegBits(floatReg, width);
 170 }
 171
 172 FloatRegBits RegFile::readFloatRegBits(int floatReg)
 173 {
 174     //Use the "natural width of a single float
 175     return floatRegFile.readRegBits(floatReg,
 176             FloatRegFile::SingleWidth);
 177 }
 178
 179 void RegFile::setFloatReg(int floatReg, const FloatReg &val, int width)
 180 {
 181     floatRegFile.setReg(floatReg, val, width);
 182 }
 183
 184 void RegFile::setFloatReg(int floatReg, const FloatReg &val)
 185 {
 186     //Use the "natural" width of a single float
 187     setFloatReg(floatReg, val, FloatRegFile::SingleWidth);
 188 }
 189
 190 void RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val, int width)
 191 {
 192     floatRegFile.setRegBits(floatReg, val, width);
 193 }
 194
 195 void RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val)
 196 {
 197     //Use the "natural" width of a single float
 198     floatRegFile.setRegBits(floatReg, val, FloatRegFile::SingleWidth);
 199 }
 200
 201 IntReg RegFile::readIntReg(int intReg)
 202 {
 203     return intRegFile.readReg(intReg);
 204 }
 205
 206 void RegFile::setIntReg(int intReg, const IntReg &val)
 207 {
 208     intRegFile.setReg(intReg, val);
 209 }
 210
 211 int X86ISA::flattenIntIndex(ThreadContext * tc, int reg)
 212 {
 213     //If we need to fold over the index to match byte semantics, do that.
 214     //Otherwise, just strip off any extra bits and pass it through.
 215     if (reg & (1 << 6))
 216         return (reg & ~(1 << 6) - 0x4);
 217     else
 218         return (reg & ~(1 << 6));
 219 }
 220
 221 void RegFile::serialize(std::ostream &os)
 222 {
 223     intRegFile.serialize(os);
 224     floatRegFile.serialize(os);
 225     miscRegFile.serialize(os);
 226     SERIALIZE_SCALAR(rip);
 227     SERIALIZE_SCALAR(nextRip);
 228 }
 229
 230 void RegFile::unserialize(Checkpoint *cp, const std::string &section)
 231 {
 232     intRegFile.unserialize(cp, section);
 233     floatRegFile.unserialize(cp, section);
 234     miscRegFile.unserialize(cp, section);
 235     UNSERIALIZE_SCALAR(rip);
 236     UNSERIALIZE_SCALAR(nextRip);
 237 }
 238
 239 void RegFile::changeContext(RegContextParam param, RegContextVal val)
 240 {
 241     panic("changeContext not implemented for x86!\n");
 242 }
 243
 244 void X86ISA::copyMiscRegs(ThreadContext *src, ThreadContext *dest)
 245 {
 246     panic("copyMiscRegs not implemented for x86!\n");
 247 }
 248
 249 void X86ISA::copyRegs(ThreadContext *src, ThreadContext *dest)
 250 {
 251     panic("copyRegs not implemented for x86!\n");
 252     //copy int regs
 253     //copy float regs
 254     copyMiscRegs(src, dest);
 255
 256     dest->setPC(src->readPC());
 257     dest->setNextPC(src->readNextPC());
 258 }