base_dyn_inst.hh revision 4032:8b987a6a2afc
1/* 2 * Copyright (c) 2004-2006 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#ifndef __CPU_BASE_DYN_INST_HH__ 32#define __CPU_BASE_DYN_INST_HH__ 33 34#include <bitset> 35#include <list> 36#include <string> 37 38#include "arch/faults.hh" 39#include "base/fast_alloc.hh" 40#include "base/trace.hh" 41#include "config/full_system.hh" 42#include "cpu/o3/comm.hh" 43#include "cpu/exetrace.hh" 44#include "cpu/inst_seq.hh" 45#include "cpu/op_class.hh" 46#include "cpu/static_inst.hh" 47#include "mem/packet.hh" 48#include "sim/system.hh" 49 50/** 51 * @file 52 * Defines a dynamic instruction context. 53 */ 54 55// Forward declaration. 56class StaticInstPtr; 57 58template <class Impl> 59class BaseDynInst : public FastAlloc, public RefCounted 60{ 61 public: 62 // Typedef for the CPU. 63 typedef typename Impl::CPUType ImplCPU; 64 typedef typename ImplCPU::ImplState ImplState; 65 66 // Logical register index type. 67 typedef TheISA::RegIndex RegIndex; 68 // Integer register type. 69 typedef TheISA::IntReg IntReg; 70 // Floating point register type. 71 typedef TheISA::FloatReg FloatReg; 72 73 // The DynInstPtr type. 74 typedef typename Impl::DynInstPtr DynInstPtr; 75 76 // The list of instructions iterator type. 77 typedef typename std::list<DynInstPtr>::iterator ListIt; 78 79 enum { 80 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, /// Max source regs 81 MaxInstDestRegs = TheISA::MaxInstDestRegs, /// Max dest regs 82 }; 83 84 /** The StaticInst used by this BaseDynInst. */ 85 StaticInstPtr staticInst; 86 87 //////////////////////////////////////////// 88 // 89 // INSTRUCTION EXECUTION 90 // 91 //////////////////////////////////////////// 92 /** InstRecord that tracks this instructions. */ 93 Trace::InstRecord *traceData; 94 95 /** 96 * Does a read to a given address. 97 * @param addr The address to read. 98 * @param data The read's data is written into this parameter. 99 * @param flags The request's flags. 100 * @return Returns any fault due to the read. 101 */ 102 template <class T> 103 Fault read(Addr addr, T &data, unsigned flags); 104 105 /** 106 * Does a write to a given address. 107 * @param data The data to be written. 108 * @param addr The address to write to. 109 * @param flags The request's flags. 110 * @param res The result of the write (for load locked/store conditionals). 111 * @return Returns any fault due to the write. 112 */ 113 template <class T> 114 Fault write(T data, Addr addr, unsigned flags, 115 uint64_t *res); 116 117 void prefetch(Addr addr, unsigned flags); 118 void writeHint(Addr addr, int size, unsigned flags); 119 Fault copySrcTranslate(Addr src); 120 Fault copy(Addr dest); 121 122 /** @todo: Consider making this private. */ 123 public: 124 /** The sequence number of the instruction. */ 125 InstSeqNum seqNum; 126 127 enum Status { 128 IqEntry, /// Instruction is in the IQ 129 RobEntry, /// Instruction is in the ROB 130 LsqEntry, /// Instruction is in the LSQ 131 Completed, /// Instruction has completed 132 ResultReady, /// Instruction has its result 133 CanIssue, /// Instruction can issue and execute 134 Issued, /// Instruction has issued 135 Executed, /// Instruction has executed 136 CanCommit, /// Instruction can commit 137 AtCommit, /// Instruction has reached commit 138 Committed, /// Instruction has committed 139 Squashed, /// Instruction is squashed 140 SquashedInIQ, /// Instruction is squashed in the IQ 141 SquashedInLSQ, /// Instruction is squashed in the LSQ 142 SquashedInROB, /// Instruction is squashed in the ROB 143 RecoverInst, /// Is a recover instruction 144 BlockingInst, /// Is a blocking instruction 145 ThreadsyncWait, /// Is a thread synchronization instruction 146 SerializeBefore, /// Needs to serialize on 147 /// instructions ahead of it 148 SerializeAfter, /// Needs to serialize instructions behind it 149 SerializeHandled, /// Serialization has been handled 150 NumStatus 151 }; 152 153 /** The status of this BaseDynInst. Several bits can be set. */ 154 std::bitset<NumStatus> status; 155 156 /** The thread this instruction is from. */ 157 short threadNumber; 158 159 /** data address space ID, for loads & stores. */ 160 short asid; 161 162 /** How many source registers are ready. */ 163 unsigned readyRegs; 164 165 /** Pointer to the Impl's CPU object. */ 166 ImplCPU *cpu; 167 168 /** Pointer to the thread state. */ 169 ImplState *thread; 170 171 /** The kind of fault this instruction has generated. */ 172 Fault fault; 173 174 /** Pointer to the data for the memory access. */ 175 uint8_t *memData; 176 177 /** The effective virtual address (lds & stores only). */ 178 Addr effAddr; 179 180 /** Is the effective virtual address valid. */ 181 bool effAddrValid; 182 183 /** The effective physical address. */ 184 Addr physEffAddr; 185 186 /** Effective virtual address for a copy source. */ 187 Addr copySrcEffAddr; 188 189 /** Effective physical address for a copy source. */ 190 Addr copySrcPhysEffAddr; 191 192 /** The memory request flags (from translation). */ 193 unsigned memReqFlags; 194 195 union Result { 196 uint64_t integer; 197// float fp; 198 double dbl; 199 }; 200 201 /** The result of the instruction; assumes for now that there's only one 202 * destination register. 203 */ 204 Result instResult; 205 206 /** Records changes to result? */ 207 bool recordResult; 208 209 /** PC of this instruction. */ 210 Addr PC; 211 212 protected: 213 /** Next non-speculative PC. It is not filled in at fetch, but rather 214 * once the target of the branch is truly known (either decode or 215 * execute). 216 */ 217 Addr nextPC; 218 219 /** Next non-speculative NPC. Target PC for Mips or Sparc. */ 220 Addr nextNPC; 221 222 /** Predicted next PC. */ 223 Addr predPC; 224 225 /** Predicted next NPC. */ 226 Addr predNPC; 227 228 /** If this is a branch that was predicted taken */ 229 bool predTaken; 230 231 public: 232 233 /** Count of total number of dynamic instructions. */ 234 static int instcount; 235 236#ifdef DEBUG 237 void dumpSNList(); 238#endif 239 240 /** Whether or not the source register is ready. 241 * @todo: Not sure this should be here vs the derived class. 242 */ 243 bool _readySrcRegIdx[MaxInstSrcRegs]; 244 245 protected: 246 /** Flattened register index of the destination registers of this 247 * instruction. 248 */ 249 TheISA::RegIndex _flatDestRegIdx[TheISA::MaxInstDestRegs]; 250 251 /** Flattened register index of the source registers of this 252 * instruction. 253 */ 254 TheISA::RegIndex _flatSrcRegIdx[TheISA::MaxInstSrcRegs]; 255 256 /** Physical register index of the destination registers of this 257 * instruction. 258 */ 259 PhysRegIndex _destRegIdx[TheISA::MaxInstDestRegs]; 260 261 /** Physical register index of the source registers of this 262 * instruction. 263 */ 264 PhysRegIndex _srcRegIdx[TheISA::MaxInstSrcRegs]; 265 266 /** Physical register index of the previous producers of the 267 * architected destinations. 268 */ 269 PhysRegIndex _prevDestRegIdx[TheISA::MaxInstDestRegs]; 270 271 public: 272 273 /** Returns the physical register index of the i'th destination 274 * register. 275 */ 276 PhysRegIndex renamedDestRegIdx(int idx) const 277 { 278 return _destRegIdx[idx]; 279 } 280 281 /** Returns the physical register index of the i'th source register. */ 282 PhysRegIndex renamedSrcRegIdx(int idx) const 283 { 284 return _srcRegIdx[idx]; 285 } 286 287 /** Returns the flattened register index of the i'th destination 288 * register. 289 */ 290 TheISA::RegIndex flattenedDestRegIdx(int idx) const 291 { 292 return _flatDestRegIdx[idx]; 293 } 294 295 /** Returns the flattened register index of the i'th source register */ 296 TheISA::RegIndex flattenedSrcRegIdx(int idx) const 297 { 298 return _flatSrcRegIdx[idx]; 299 } 300 301 /** Returns the physical register index of the previous physical register 302 * that remapped to the same logical register index. 303 */ 304 PhysRegIndex prevDestRegIdx(int idx) const 305 { 306 return _prevDestRegIdx[idx]; 307 } 308 309 /** Renames a destination register to a physical register. Also records 310 * the previous physical register that the logical register mapped to. 311 */ 312 void renameDestReg(int idx, 313 PhysRegIndex renamed_dest, 314 PhysRegIndex previous_rename) 315 { 316 _destRegIdx[idx] = renamed_dest; 317 _prevDestRegIdx[idx] = previous_rename; 318 } 319 320 /** Renames a source logical register to the physical register which 321 * has/will produce that logical register's result. 322 * @todo: add in whether or not the source register is ready. 323 */ 324 void renameSrcReg(int idx, PhysRegIndex renamed_src) 325 { 326 _srcRegIdx[idx] = renamed_src; 327 } 328 329 /** Flattens a source architectural register index into a logical index. 330 */ 331 void flattenSrcReg(int idx, TheISA::RegIndex flattened_src) 332 { 333 _flatSrcRegIdx[idx] = flattened_src; 334 } 335 336 /** Flattens a destination architectural register index into a logical 337 * index. 338 */ 339 void flattenDestReg(int idx, TheISA::RegIndex flattened_dest) 340 { 341 _flatDestRegIdx[idx] = flattened_dest; 342 } 343 344 /** BaseDynInst constructor given a binary instruction. 345 * @param inst The binary instruction. 346 * @param PC The PC of the instruction. 347 * @param pred_PC The predicted next PC. 348 * @param pred_NPC The predicted next NPC. 349 * @param seq_num The sequence number of the instruction. 350 * @param cpu Pointer to the instruction's CPU. 351 */ 352 BaseDynInst(TheISA::ExtMachInst inst, Addr PC, Addr NPC, 353 Addr pred_PC, Addr pred_NPC, 354 InstSeqNum seq_num, ImplCPU *cpu); 355 356 /** BaseDynInst constructor given a StaticInst pointer. 357 * @param _staticInst The StaticInst for this BaseDynInst. 358 */ 359 BaseDynInst(StaticInstPtr &_staticInst); 360 361 /** BaseDynInst destructor. */ 362 ~BaseDynInst(); 363 364 private: 365 /** Function to initialize variables in the constructors. */ 366 void initVars(); 367 368 public: 369 /** Dumps out contents of this BaseDynInst. */ 370 void dump(); 371 372 /** Dumps out contents of this BaseDynInst into given string. */ 373 void dump(std::string &outstring); 374 375 /** Read this CPU's ID. */ 376 int readCpuId() { return cpu->readCpuId(); } 377 378 /** Returns the fault type. */ 379 Fault getFault() { return fault; } 380 381 /** Checks whether or not this instruction has had its branch target 382 * calculated yet. For now it is not utilized and is hacked to be 383 * always false. 384 * @todo: Actually use this instruction. 385 */ 386 bool doneTargCalc() { return false; } 387 388 /** Returns the next PC. This could be the speculative next PC if it is 389 * called prior to the actual branch target being calculated. 390 */ 391 Addr readNextPC() { return nextPC; } 392 393 /** Returns the next NPC. This could be the speculative next NPC if it is 394 * called prior to the actual branch target being calculated. 395 */ 396 Addr readNextNPC() 397 { 398#if ISA_HAS_DELAY_SLOT 399 return nextNPC; 400#else 401 return nextPC + sizeof(TheISA::MachInst); 402#endif 403 } 404 405 /** Set the predicted target of this current instruction. */ 406 void setPredTarg(Addr predicted_PC, Addr predicted_NPC) 407 { 408 predPC = predicted_PC; 409 predNPC = predicted_NPC; 410 } 411 412 /** Returns the predicted PC immediately after the branch. */ 413 Addr readPredPC() { return predPC; } 414 415 /** Returns the predicted PC two instructions after the branch */ 416 Addr readPredNPC() { return predNPC; } 417 418 /** Returns whether the instruction was predicted taken or not. */ 419 bool readPredTaken() 420 { 421 return predTaken; 422 } 423 424 void setPredTaken(bool predicted_taken) 425 { 426 predTaken = predicted_taken; 427 } 428 429 /** Returns whether the instruction mispredicted. */ 430 bool mispredicted() 431 { 432 return readPredPC() != readNextPC() || 433 readPredNPC() != readNextNPC(); 434 } 435 436 // 437 // Instruction types. Forward checks to StaticInst object. 438 // 439 bool isNop() const { return staticInst->isNop(); } 440 bool isMemRef() const { return staticInst->isMemRef(); } 441 bool isLoad() const { return staticInst->isLoad(); } 442 bool isStore() const { return staticInst->isStore(); } 443 bool isStoreConditional() const 444 { return staticInst->isStoreConditional(); } 445 bool isInstPrefetch() const { return staticInst->isInstPrefetch(); } 446 bool isDataPrefetch() const { return staticInst->isDataPrefetch(); } 447 bool isCopy() const { return staticInst->isCopy(); } 448 bool isInteger() const { return staticInst->isInteger(); } 449 bool isFloating() const { return staticInst->isFloating(); } 450 bool isControl() const { return staticInst->isControl(); } 451 bool isCall() const { return staticInst->isCall(); } 452 bool isReturn() const { return staticInst->isReturn(); } 453 bool isDirectCtrl() const { return staticInst->isDirectCtrl(); } 454 bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); } 455 bool isCondCtrl() const { return staticInst->isCondCtrl(); } 456 bool isUncondCtrl() const { return staticInst->isUncondCtrl(); } 457 bool isCondDelaySlot() const { return staticInst->isCondDelaySlot(); } 458 bool isThreadSync() const { return staticInst->isThreadSync(); } 459 bool isSerializing() const { return staticInst->isSerializing(); } 460 bool isSerializeBefore() const 461 { return staticInst->isSerializeBefore() || status[SerializeBefore]; } 462 bool isSerializeAfter() const 463 { return staticInst->isSerializeAfter() || status[SerializeAfter]; } 464 bool isMemBarrier() const { return staticInst->isMemBarrier(); } 465 bool isWriteBarrier() const { return staticInst->isWriteBarrier(); } 466 bool isNonSpeculative() const { return staticInst->isNonSpeculative(); } 467 bool isQuiesce() const { return staticInst->isQuiesce(); } 468 bool isIprAccess() const { return staticInst->isIprAccess(); } 469 bool isUnverifiable() const { return staticInst->isUnverifiable(); } 470 471 /** Temporarily sets this instruction as a serialize before instruction. */ 472 void setSerializeBefore() { status.set(SerializeBefore); } 473 474 /** Clears the serializeBefore part of this instruction. */ 475 void clearSerializeBefore() { status.reset(SerializeBefore); } 476 477 /** Checks if this serializeBefore is only temporarily set. */ 478 bool isTempSerializeBefore() { return status[SerializeBefore]; } 479 480 /** Temporarily sets this instruction as a serialize after instruction. */ 481 void setSerializeAfter() { status.set(SerializeAfter); } 482 483 /** Clears the serializeAfter part of this instruction.*/ 484 void clearSerializeAfter() { status.reset(SerializeAfter); } 485 486 /** Checks if this serializeAfter is only temporarily set. */ 487 bool isTempSerializeAfter() { return status[SerializeAfter]; } 488 489 /** Sets the serialization part of this instruction as handled. */ 490 void setSerializeHandled() { status.set(SerializeHandled); } 491 492 /** Checks if the serialization part of this instruction has been 493 * handled. This does not apply to the temporary serializing 494 * state; it only applies to this instruction's own permanent 495 * serializing state. 496 */ 497 bool isSerializeHandled() { return status[SerializeHandled]; } 498 499 /** Returns the opclass of this instruction. */ 500 OpClass opClass() const { return staticInst->opClass(); } 501 502 /** Returns the branch target address. */ 503 Addr branchTarget() const { return staticInst->branchTarget(PC); } 504 505 /** Returns the number of source registers. */ 506 int8_t numSrcRegs() const { return staticInst->numSrcRegs(); } 507 508 /** Returns the number of destination registers. */ 509 int8_t numDestRegs() const { return staticInst->numDestRegs(); } 510 511 // the following are used to track physical register usage 512 // for machines with separate int & FP reg files 513 int8_t numFPDestRegs() const { return staticInst->numFPDestRegs(); } 514 int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); } 515 516 /** Returns the logical register index of the i'th destination register. */ 517 RegIndex destRegIdx(int i) const { return staticInst->destRegIdx(i); } 518 519 /** Returns the logical register index of the i'th source register. */ 520 RegIndex srcRegIdx(int i) const { return staticInst->srcRegIdx(i); } 521 522 /** Returns the result of an integer instruction. */ 523 uint64_t readIntResult() { return instResult.integer; } 524 525 /** Returns the result of a floating point instruction. */ 526 float readFloatResult() { return (float)instResult.dbl; } 527 528 /** Returns the result of a floating point (double) instruction. */ 529 double readDoubleResult() { return instResult.dbl; } 530 531 /** Records an integer register being set to a value. */ 532 void setIntRegOperand(const StaticInst *si, int idx, uint64_t val) 533 { 534 if (recordResult) 535 instResult.integer = val; 536 } 537 538 /** Records an fp register being set to a value. */ 539 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val, 540 int width) 541 { 542 if (recordResult) { 543 if (width == 32) 544 instResult.dbl = (double)val; 545 else if (width == 64) 546 instResult.dbl = val; 547 else 548 panic("Unsupported width!"); 549 } 550 } 551 552 /** Records an fp register being set to a value. */ 553 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val) 554 { 555 if (recordResult) 556 instResult.dbl = (double)val; 557 } 558 559 /** Records an fp register being set to an integer value. */ 560 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val, 561 int width) 562 { 563 if (recordResult) 564 instResult.integer = val; 565 } 566 567 /** Records an fp register being set to an integer value. */ 568 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val) 569 { 570 if (recordResult) 571 instResult.integer = val; 572 } 573 574 /** Records that one of the source registers is ready. */ 575 void markSrcRegReady(); 576 577 /** Marks a specific register as ready. */ 578 void markSrcRegReady(RegIndex src_idx); 579 580 /** Returns if a source register is ready. */ 581 bool isReadySrcRegIdx(int idx) const 582 { 583 return this->_readySrcRegIdx[idx]; 584 } 585 586 /** Sets this instruction as completed. */ 587 void setCompleted() { status.set(Completed); } 588 589 /** Returns whether or not this instruction is completed. */ 590 bool isCompleted() const { return status[Completed]; } 591 592 /** Marks the result as ready. */ 593 void setResultReady() { status.set(ResultReady); } 594 595 /** Returns whether or not the result is ready. */ 596 bool isResultReady() const { return status[ResultReady]; } 597 598 /** Sets this instruction as ready to issue. */ 599 void setCanIssue() { status.set(CanIssue); } 600 601 /** Returns whether or not this instruction is ready to issue. */ 602 bool readyToIssue() const { return status[CanIssue]; } 603 604 /** Clears this instruction being able to issue. */ 605 void clearCanIssue() { status.reset(CanIssue); } 606 607 /** Sets this instruction as issued from the IQ. */ 608 void setIssued() { status.set(Issued); } 609 610 /** Returns whether or not this instruction has issued. */ 611 bool isIssued() const { return status[Issued]; } 612 613 /** Clears this instruction as being issued. */ 614 void clearIssued() { status.reset(Issued); } 615 616 /** Sets this instruction as executed. */ 617 void setExecuted() { status.set(Executed); } 618 619 /** Returns whether or not this instruction has executed. */ 620 bool isExecuted() const { return status[Executed]; } 621 622 /** Sets this instruction as ready to commit. */ 623 void setCanCommit() { status.set(CanCommit); } 624 625 /** Clears this instruction as being ready to commit. */ 626 void clearCanCommit() { status.reset(CanCommit); } 627 628 /** Returns whether or not this instruction is ready to commit. */ 629 bool readyToCommit() const { return status[CanCommit]; } 630 631 void setAtCommit() { status.set(AtCommit); } 632 633 bool isAtCommit() { return status[AtCommit]; } 634 635 /** Sets this instruction as committed. */ 636 void setCommitted() { status.set(Committed); } 637 638 /** Returns whether or not this instruction is committed. */ 639 bool isCommitted() const { return status[Committed]; } 640 641 /** Sets this instruction as squashed. */ 642 void setSquashed() { status.set(Squashed); } 643 644 /** Returns whether or not this instruction is squashed. */ 645 bool isSquashed() const { return status[Squashed]; } 646 647 //Instruction Queue Entry 648 //----------------------- 649 /** Sets this instruction as a entry the IQ. */ 650 void setInIQ() { status.set(IqEntry); } 651 652 /** Sets this instruction as a entry the IQ. */ 653 void clearInIQ() { status.reset(IqEntry); } 654 655 /** Returns whether or not this instruction has issued. */ 656 bool isInIQ() const { return status[IqEntry]; } 657 658 /** Sets this instruction as squashed in the IQ. */ 659 void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);} 660 661 /** Returns whether or not this instruction is squashed in the IQ. */ 662 bool isSquashedInIQ() const { return status[SquashedInIQ]; } 663 664 665 //Load / Store Queue Functions 666 //----------------------- 667 /** Sets this instruction as a entry the LSQ. */ 668 void setInLSQ() { status.set(LsqEntry); } 669 670 /** Sets this instruction as a entry the LSQ. */ 671 void removeInLSQ() { status.reset(LsqEntry); } 672 673 /** Returns whether or not this instruction is in the LSQ. */ 674 bool isInLSQ() const { return status[LsqEntry]; } 675 676 /** Sets this instruction as squashed in the LSQ. */ 677 void setSquashedInLSQ() { status.set(SquashedInLSQ);} 678 679 /** Returns whether or not this instruction is squashed in the LSQ. */ 680 bool isSquashedInLSQ() const { return status[SquashedInLSQ]; } 681 682 683 //Reorder Buffer Functions 684 //----------------------- 685 /** Sets this instruction as a entry the ROB. */ 686 void setInROB() { status.set(RobEntry); } 687 688 /** Sets this instruction as a entry the ROB. */ 689 void clearInROB() { status.reset(RobEntry); } 690 691 /** Returns whether or not this instruction is in the ROB. */ 692 bool isInROB() const { return status[RobEntry]; } 693 694 /** Sets this instruction as squashed in the ROB. */ 695 void setSquashedInROB() { status.set(SquashedInROB); } 696 697 /** Returns whether or not this instruction is squashed in the ROB. */ 698 bool isSquashedInROB() const { return status[SquashedInROB]; } 699 700 /** Read the PC of this instruction. */ 701 const Addr readPC() const { return PC; } 702 703 /** Set the next PC of this instruction (its actual target). */ 704 void setNextPC(uint64_t val) 705 { 706 nextPC = val; 707 } 708 709 /** Set the next NPC of this instruction (the target in Mips or Sparc).*/ 710 void setNextNPC(uint64_t val) 711 { 712 nextNPC = val; 713 } 714 715 /** Sets the ASID. */ 716 void setASID(short addr_space_id) { asid = addr_space_id; } 717 718 /** Sets the thread id. */ 719 void setTid(unsigned tid) { threadNumber = tid; } 720 721 /** Sets the pointer to the thread state. */ 722 void setThreadState(ImplState *state) { thread = state; } 723 724 /** Returns the thread context. */ 725 ThreadContext *tcBase() { return thread->getTC(); } 726 727 private: 728 /** Instruction effective address. 729 * @todo: Consider if this is necessary or not. 730 */ 731 Addr instEffAddr; 732 733 /** Whether or not the effective address calculation is completed. 734 * @todo: Consider if this is necessary or not. 735 */ 736 bool eaCalcDone; 737 738 /** Is this instruction's memory access uncacheable. */ 739 bool isUncacheable; 740 741 /** Has this instruction generated a memory request. */ 742 bool reqMade; 743 744 public: 745 /** Sets the effective address. */ 746 void setEA(Addr &ea) { instEffAddr = ea; eaCalcDone = true; } 747 748 /** Returns the effective address. */ 749 const Addr &getEA() const { return instEffAddr; } 750 751 /** Returns whether or not the eff. addr. calculation has been completed. */ 752 bool doneEACalc() { return eaCalcDone; } 753 754 /** Returns whether or not the eff. addr. source registers are ready. */ 755 bool eaSrcsReady(); 756 757 /** Whether or not the memory operation is done. */ 758 bool memOpDone; 759 760 /** Is this instruction's memory access uncacheable. */ 761 bool uncacheable() { return isUncacheable; } 762 763 /** Has this instruction generated a memory request. */ 764 bool hasRequest() { return reqMade; } 765 766 public: 767 /** Load queue index. */ 768 int16_t lqIdx; 769 770 /** Store queue index. */ 771 int16_t sqIdx; 772 773 /** Iterator pointing to this BaseDynInst in the list of all insts. */ 774 ListIt instListIt; 775 776 /** Returns iterator to this instruction in the list of all insts. */ 777 ListIt &getInstListIt() { return instListIt; } 778 779 /** Sets iterator for this instruction in the list of all insts. */ 780 void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; } 781 782 public: 783 /** Returns the number of consecutive store conditional failures. */ 784 unsigned readStCondFailures() 785 { return thread->storeCondFailures; } 786 787 /** Sets the number of consecutive store conditional failures. */ 788 void setStCondFailures(unsigned sc_failures) 789 { thread->storeCondFailures = sc_failures; } 790}; 791 792template<class Impl> 793template<class T> 794inline Fault 795BaseDynInst<Impl>::read(Addr addr, T &data, unsigned flags) 796{ 797 reqMade = true; 798 Request *req = new Request(); 799 req->setVirt(asid, addr, sizeof(T), flags, this->PC); 800 req->setThreadContext(thread->readCpuId(), threadNumber); 801 802 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() > 803 TheISA::VMPageSize) { 804 delete req; 805 return TheISA::genAlignmentFault(); 806 } 807 808 fault = cpu->translateDataReadReq(req, thread); 809 810 if (req->isUncacheable()) 811 isUncacheable = true; 812 813 if (fault == NoFault) { 814 effAddr = req->getVaddr(); 815 effAddrValid = true; 816 physEffAddr = req->getPaddr(); 817 memReqFlags = req->getFlags(); 818 819#if 0 820 if (cpu->system->memctrl->badaddr(physEffAddr)) { 821 fault = TheISA::genMachineCheckFault(); 822 data = (T)-1; 823 this->setExecuted(); 824 } else { 825 fault = cpu->read(req, data, lqIdx); 826 } 827#else 828 fault = cpu->read(req, data, lqIdx); 829#endif 830 } else { 831 // Return a fixed value to keep simulation deterministic even 832 // along misspeculated paths. 833 data = (T)-1; 834 835 // Commit will have to clean up whatever happened. Set this 836 // instruction as executed. 837 this->setExecuted(); 838 delete req; 839 } 840 841 if (traceData) { 842 traceData->setAddr(addr); 843 traceData->setData(data); 844 } 845 846 return fault; 847} 848 849template<class Impl> 850template<class T> 851inline Fault 852BaseDynInst<Impl>::write(T data, Addr addr, unsigned flags, uint64_t *res) 853{ 854 if (traceData) { 855 traceData->setAddr(addr); 856 traceData->setData(data); 857 } 858 859 reqMade = true; 860 Request *req = new Request(); 861 req->setVirt(asid, addr, sizeof(T), flags, this->PC); 862 req->setThreadContext(thread->readCpuId(), threadNumber); 863 864 if ((req->getVaddr() & (TheISA::VMPageSize - 1)) + req->getSize() > 865 TheISA::VMPageSize) { 866 delete req; 867 return TheISA::genAlignmentFault(); 868 } 869 870 fault = cpu->translateDataWriteReq(req, thread); 871 872 if (req->isUncacheable()) 873 isUncacheable = true; 874 875 if (fault == NoFault) { 876 effAddr = req->getVaddr(); 877 effAddrValid = true; 878 physEffAddr = req->getPaddr(); 879 memReqFlags = req->getFlags(); 880#if 0 881 if (cpu->system->memctrl->badaddr(physEffAddr)) { 882 fault = TheISA::genMachineCheckFault(); 883 } else { 884 fault = cpu->write(req, data, sqIdx); 885 } 886#else 887 fault = cpu->write(req, data, sqIdx); 888#endif 889 } else { 890 delete req; 891 } 892 893 return fault; 894} 895 896#endif // __CPU_BASE_DYN_INST_HH__ 897