src/cpu/ozone/dyn_inst_impl.hh

   1 /*
   2  * Copyright (c) 2005-2006 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: Kevin Lim
  29  */
  30
  31 #include "arch/faults.hh"
  32 #include "config/full_system.hh"
  33 #include "cpu/ozone/dyn_inst.hh"
  34 #include "kern/kernel_stats.hh"
  35
  36 template <class Impl>
  37 OzoneDynInst<Impl>::OzoneDynInst(OzoneCPU *cpu)
  38     : BaseDynInst<Impl>(0, 0, 0, 0, cpu)
  39 {
  40     this->setResultReady();
  41
  42     initInstPtrs();
  43 }
  44
  45 template <class Impl>
  46 OzoneDynInst<Impl>::OzoneDynInst(ExtMachInst inst, Addr PC, Addr Pred_PC,
  47                                  InstSeqNum seq_num, OzoneCPU *cpu)
  48     : BaseDynInst<Impl>(inst, PC, Pred_PC, seq_num, cpu)
  49 {
  50     initInstPtrs();
  51 }
  52
  53 template <class Impl>
  54 OzoneDynInst<Impl>::OzoneDynInst(StaticInstPtr _staticInst)
  55     : BaseDynInst<Impl>(_staticInst)
  56 {
  57     initInstPtrs();
  58 }
  59
  60 template <class Impl>
  61 OzoneDynInst<Impl>::~OzoneDynInst()
  62 {
  63     DPRINTF(BE, "[sn:%lli] destructor called\n", this->seqNum);
  64     for (int i = 0; i < this->numSrcRegs(); ++i) {
  65         srcInsts[i] = NULL;
  66     }
  67
  68     for (int i = 0; i < this->numDestRegs(); ++i) {
  69         prevDestInst[i] = NULL;
  70     }
  71
  72     dependents.clear();
  73 }
  74
  75 template <class Impl>
  76 Fault
  77 OzoneDynInst<Impl>::execute()
  78 {
  79     // @todo: Pretty convoluted way to avoid squashing from happening when using
  80     // the XC during an instruction's execution (specifically for instructions
  81     // that have sideeffects that use the XC).  Fix this.
  82     bool in_syscall = this->thread->inSyscall;
  83     this->thread->inSyscall = true;
  84
  85     this->fault = this->staticInst->execute(this, this->traceData);
  86
  87     this->thread->inSyscall = in_syscall;
  88
  89     return this->fault;
  90 }
  91
  92 template <class Impl>
  93 Fault
  94 OzoneDynInst<Impl>::initiateAcc()
  95 {
  96     // @todo: Pretty convoluted way to avoid squashing from happening when using
  97     // the XC during an instruction's execution (specifically for instructions
  98     // that have sideeffects that use the XC).  Fix this.
  99     bool in_syscall = this->thread->inSyscall;
 100     this->thread->inSyscall = true;
 101
 102     this->fault = this->staticInst->initiateAcc(this, this->traceData);
 103
 104     this->thread->inSyscall = in_syscall;
 105
 106     return this->fault;
 107 }
 108
 109 template <class Impl>
 110 Fault
 111 OzoneDynInst<Impl>::completeAcc(Packet *pkt)
 112 {
 113     this->fault = this->staticInst->completeAcc(pkt, this, this->traceData);
 114
 115     return this->fault;
 116 }
 117
 118 template <class Impl>
 119 bool
 120 OzoneDynInst<Impl>::srcInstReady(int regIdx)
 121 {
 122     return srcInsts[regIdx]->isResultReady();
 123 }
 124
 125 template <class Impl>
 126 void
 127 OzoneDynInst<Impl>::addDependent(DynInstPtr &dependent_inst)
 128 {
 129     dependents.push_back(dependent_inst);
 130 }
 131
 132 template <class Impl>
 133 void
 134 OzoneDynInst<Impl>::wakeDependents()
 135 {
 136     for (int i = 0; i < dependents.size(); ++i) {
 137         dependents[i]->markSrcRegReady();
 138     }
 139 }
 140
 141 template <class Impl>
 142 void
 143 OzoneDynInst<Impl>::wakeMemDependents()
 144 {
 145     for (int i = 0; i < memDependents.size(); ++i) {
 146         memDependents[i]->markMemInstReady(this);
 147     }
 148 }
 149
 150 template <class Impl>
 151 void
 152 OzoneDynInst<Impl>::markMemInstReady(OzoneDynInst<Impl> *inst)
 153 {
 154     ListIt mem_it = srcMemInsts.begin();
 155     while ((*mem_it) != inst && mem_it != srcMemInsts.end()) {
 156         mem_it++;
 157     }
 158     assert(mem_it != srcMemInsts.end());
 159
 160     srcMemInsts.erase(mem_it);
 161 }
 162
 163 template <class Impl>
 164 void
 165 OzoneDynInst<Impl>::initInstPtrs()
 166 {
 167     for (int i = 0; i < MaxInstSrcRegs; ++i) {
 168         srcInsts[i] = NULL;
 169     }
 170     iqItValid = false;
 171 }
 172
 173 template <class Impl>
 174 bool
 175 OzoneDynInst<Impl>::srcsReady()
 176 {
 177     for (int i = 0; i < this->numSrcRegs(); ++i) {
 178         if (!srcInsts[i]->isResultReady())
 179             return false;
 180     }
 181
 182     return true;
 183 }
 184
 185 template <class Impl>
 186 bool
 187 OzoneDynInst<Impl>::eaSrcsReady()
 188 {
 189     for (int i = 1; i < this->numSrcRegs(); ++i) {
 190         if (!srcInsts[i]->isResultReady())
 191             return false;
 192     }
 193
 194     return true;
 195 }
 196
 197 template <class Impl>
 198 void
 199 OzoneDynInst<Impl>::clearDependents()
 200 {
 201     dependents.clear();
 202     for (int i = 0; i < this->numSrcRegs(); ++i) {
 203         srcInsts[i] = NULL;
 204     }
 205     for (int i = 0; i < this->numDestRegs(); ++i) {
 206         prevDestInst[i] = NULL;
 207     }
 208 }
 209
 210 template <class Impl>
 211 void
 212 OzoneDynInst<Impl>::clearMemDependents()
 213 {
 214     memDependents.clear();
 215 }
 216
 217 template <class Impl>
 218 MiscReg
 219 OzoneDynInst<Impl>::readMiscReg(int misc_reg)
 220 {
 221     return this->thread->readMiscReg(misc_reg);
 222 }
 223
 224 template <class Impl>
 225 MiscReg
 226 OzoneDynInst<Impl>::readMiscRegWithEffect(int misc_reg, Fault &fault)
 227 {
 228     return this->thread->readMiscRegWithEffect(misc_reg, fault);
 229 }
 230
 231 template <class Impl>
 232 Fault
 233 OzoneDynInst<Impl>::setMiscReg(int misc_reg, const MiscReg &val)
 234 {
 235     this->setIntResult(val);
 236     return this->thread->setMiscReg(misc_reg, val);
 237 }
 238
 239 template <class Impl>
 240 Fault
 241 OzoneDynInst<Impl>::setMiscRegWithEffect(int misc_reg, const MiscReg &val)
 242 {
 243     return this->thread->setMiscRegWithEffect(misc_reg, val);
 244 }
 245
 246 #if FULL_SYSTEM
 247
 248 template <class Impl>
 249 Fault
 250 OzoneDynInst<Impl>::hwrei()
 251 {
 252     if (!this->cpu->inPalMode(this->readPC()))
 253         return new AlphaISA::UnimplementedOpcodeFault;
 254
 255     this->setNextPC(this->thread->readMiscReg(AlphaISA::IPR_EXC_ADDR));
 256
 257     this->cpu->hwrei();
 258
 259     // FIXME: XXX check for interrupts? XXX
 260     return NoFault;
 261 }
 262
 263 template <class Impl>
 264 int
 265 OzoneDynInst<Impl>::readIntrFlag()
 266 {
 267 return this->cpu->readIntrFlag();
 268 }
 269
 270 template <class Impl>
 271 void
 272 OzoneDynInst<Impl>::setIntrFlag(int val)
 273 {
 274     this->cpu->setIntrFlag(val);
 275 }
 276
 277 template <class Impl>
 278 bool
 279 OzoneDynInst<Impl>::inPalMode()
 280 {
 281     return this->cpu->inPalMode();
 282 }
 283
 284 template <class Impl>
 285 void
 286 OzoneDynInst<Impl>::trap(Fault fault)
 287 {
 288     fault->invoke(this->thread->getTC());
 289 }
 290
 291 template <class Impl>
 292 bool
 293 OzoneDynInst<Impl>::simPalCheck(int palFunc)
 294 {
 295     return this->cpu->simPalCheck(palFunc);
 296 }
 297 #else
 298 template <class Impl>
 299 void
 300 OzoneDynInst<Impl>::syscall(uint64_t &callnum)
 301 {
 302     this->cpu->syscall(callnum);
 303 }
 304 #endif