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 "sim/serialize.hh"
  90 #include "cpu/thread_context.hh"
  91
  92 class Checkpoint;
  93
  94 using namespace X86ISA;
  95 using namespace std;
  96
  97 //RegFile class methods
  98 Addr RegFile::readPC()
  99 {
 100     return rip;
 101 }
 102
 103 void RegFile::setPC(Addr val)
 104 {
 105     rip = val;
 106 }
 107
 108 Addr RegFile::readNextPC()
 109 {
 110     return nextRip;
 111 }
 112
 113 void RegFile::setNextPC(Addr val)
 114 {
 115     nextRip = val;
 116 }
 117
 118 Addr RegFile::readNextNPC()
 119 {
 120     //There's no way to know how big the -next- instruction will be.
 121     return nextRip + 1;
 122 }
 123
 124 void RegFile::setNextNPC(Addr val)
 125 { }
 126
 127 void RegFile::clear()
 128 {
 129     floatRegFile.clear();
 130     intRegFile.clear();
 131     miscRegFile.clear();
 132 }
 133
 134 MiscReg RegFile::readMiscRegNoEffect(int miscReg)
 135 {
 136     return miscRegFile.readRegNoEffect(miscReg);
 137 }
 138
 139 MiscReg RegFile::readMiscReg(int miscReg, ThreadContext *tc)
 140 {
 141     return miscRegFile.readReg(miscReg, tc);
 142 }
 143
 144 void RegFile::setMiscRegNoEffect(int miscReg, const MiscReg &val)
 145 {
 146     miscRegFile.setRegNoEffect(miscReg, val);
 147 }
 148
 149 void RegFile::setMiscReg(int miscReg, const MiscReg &val,
 150         ThreadContext * tc)
 151 {
 152     miscRegFile.setReg(miscReg, val, tc);
 153 }
 154
 155 FloatReg RegFile::readFloatReg(int floatReg, int width)
 156 {
 157     return floatRegFile.readReg(floatReg, width);
 158 }
 159
 160 FloatReg RegFile::readFloatReg(int floatReg)
 161 {
 162     //Use the "natural" width of a single float
 163     return floatRegFile.readReg(floatReg, FloatRegFile::SingleWidth);
 164 }
 165
 166 FloatRegBits RegFile::readFloatRegBits(int floatReg, int width)
 167 {
 168     return floatRegFile.readRegBits(floatReg, width);
 169 }
 170
 171 FloatRegBits RegFile::readFloatRegBits(int floatReg)
 172 {
 173     //Use the "natural width of a single float
 174     return floatRegFile.readRegBits(floatReg,
 175             FloatRegFile::SingleWidth);
 176 }
 177
 178 void RegFile::setFloatReg(int floatReg, const FloatReg &val, int width)
 179 {
 180     floatRegFile.setReg(floatReg, val, width);
 181 }
 182
 183 void RegFile::setFloatReg(int floatReg, const FloatReg &val)
 184 {
 185     //Use the "natural" width of a single float
 186     setFloatReg(floatReg, val, FloatRegFile::SingleWidth);
 187 }
 188
 189 void RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val, int width)
 190 {
 191     floatRegFile.setRegBits(floatReg, val, width);
 192 }
 193
 194 void RegFile::setFloatRegBits(int floatReg, const FloatRegBits &val)
 195 {
 196     //Use the "natural" width of a single float
 197     floatRegFile.setRegBits(floatReg, val, FloatRegFile::SingleWidth);
 198 }
 199
 200 IntReg RegFile::readIntReg(int intReg)
 201 {
 202     return intRegFile.readReg(intReg);
 203 }
 204
 205 void RegFile::setIntReg(int intReg, const IntReg &val)
 206 {
 207     intRegFile.setReg(intReg, val);
 208 }
 209
 210 int X86ISA::flattenIntIndex(ThreadContext * tc, int reg)
 211 {
 212     //For right now, don't do any flattening
 213     return reg;
 214 }
 215
 216 void RegFile::serialize(std::ostream &os)
 217 {
 218     intRegFile.serialize(os);
 219     floatRegFile.serialize(os);
 220     miscRegFile.serialize(os);
 221     SERIALIZE_SCALAR(rip);
 222     SERIALIZE_SCALAR(nextRip);
 223 }
 224
 225 void RegFile::unserialize(Checkpoint *cp, const std::string &section)
 226 {
 227     intRegFile.unserialize(cp, section);
 228     floatRegFile.unserialize(cp, section);
 229     miscRegFile.unserialize(cp, section);
 230     UNSERIALIZE_SCALAR(rip);
 231     UNSERIALIZE_SCALAR(nextRip);
 232 }
 233
 234 void RegFile::changeContext(RegContextParam param, RegContextVal val)
 235 {
 236     panic("changeContext not implemented for x86!\n");
 237 }
 238
 239 void X86ISA::copyMiscRegs(ThreadContext *src, ThreadContext *dest)
 240 {
 241     panic("copyMiscRegs not implemented for x86!\n");
 242 }
 243
 244 void X86ISA::copyRegs(ThreadContext *src, ThreadContext *dest)
 245 {
 246     panic("copyRegs not implemented for x86!\n");
 247     //copy int regs
 248     //copy float regs
 249     copyMiscRegs(src, dest);
 250
 251     dest->setPC(src->readPC());
 252     dest->setNextPC(src->readNextPC());
 253 }