base_dyn_inst.hh revision 9046
1/* 2 * Copyright (c) 2011 ARM Limited 3 * All rights reserved. 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2004-2006 The Regents of The University of Michigan 15 * Copyright (c) 2009 The University of Edinburgh 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Kevin Lim 42 * Timothy M. Jones 43 */ 44 45#ifndef __CPU_BASE_DYN_INST_HH__ 46#define __CPU_BASE_DYN_INST_HH__ 47 48#include <bitset> 49#include <list> 50#include <string> 51#include <queue> 52 53#include "arch/utility.hh" 54#include "base/trace.hh" 55#include "config/the_isa.hh" 56#include "cpu/checker/cpu.hh" 57#include "cpu/o3/comm.hh" 58#include "cpu/exetrace.hh" 59#include "cpu/inst_seq.hh" 60#include "cpu/op_class.hh" 61#include "cpu/static_inst.hh" 62#include "cpu/translation.hh" 63#include "mem/packet.hh" 64#include "sim/byteswap.hh" 65#include "sim/fault_fwd.hh" 66#include "sim/system.hh" 67#include "sim/tlb.hh" 68 69/** 70 * @file 71 * Defines a dynamic instruction context. 72 */ 73 74template <class Impl> 75class BaseDynInst : public RefCounted 76{ 77 public: 78 // Typedef for the CPU. 79 typedef typename Impl::CPUType ImplCPU; 80 typedef typename ImplCPU::ImplState ImplState; 81 82 // Logical register index type. 83 typedef TheISA::RegIndex RegIndex; 84 // Integer register type. 85 typedef TheISA::IntReg IntReg; 86 // Floating point register type. 87 typedef TheISA::FloatReg FloatReg; 88 89 // The DynInstPtr type. 90 typedef typename Impl::DynInstPtr DynInstPtr; 91 typedef RefCountingPtr<BaseDynInst<Impl> > BaseDynInstPtr; 92 93 // The list of instructions iterator type. 94 typedef typename std::list<DynInstPtr>::iterator ListIt; 95 96 enum { 97 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, /// Max source regs 98 MaxInstDestRegs = TheISA::MaxInstDestRegs /// Max dest regs 99 }; 100 101 union Result { 102 uint64_t integer; 103 double dbl; 104 void set(uint64_t i) { integer = i; } 105 void set(double d) { dbl = d; } 106 void get(uint64_t& i) { i = integer; } 107 void get(double& d) { d = dbl; } 108 }; 109 110 protected: 111 enum Status { 112 IqEntry, /// Instruction is in the IQ 113 RobEntry, /// Instruction is in the ROB 114 LsqEntry, /// Instruction is in the LSQ 115 Completed, /// Instruction has completed 116 ResultReady, /// Instruction has its result 117 CanIssue, /// Instruction can issue and execute 118 Issued, /// Instruction has issued 119 Executed, /// Instruction has executed 120 CanCommit, /// Instruction can commit 121 AtCommit, /// Instruction has reached commit 122 Committed, /// Instruction has committed 123 Squashed, /// Instruction is squashed 124 SquashedInIQ, /// Instruction is squashed in the IQ 125 SquashedInLSQ, /// Instruction is squashed in the LSQ 126 SquashedInROB, /// Instruction is squashed in the ROB 127 RecoverInst, /// Is a recover instruction 128 BlockingInst, /// Is a blocking instruction 129 ThreadsyncWait, /// Is a thread synchronization instruction 130 SerializeBefore, /// Needs to serialize on 131 /// instructions ahead of it 132 SerializeAfter, /// Needs to serialize instructions behind it 133 SerializeHandled, /// Serialization has been handled 134 NumStatus 135 }; 136 137 enum Flags { 138 TranslationStarted, 139 TranslationCompleted, 140 PossibleLoadViolation, 141 HitExternalSnoop, 142 EffAddrValid, 143 RecordResult, 144 Predicate, 145 PredTaken, 146 /** Whether or not the effective address calculation is completed. 147 * @todo: Consider if this is necessary or not. 148 */ 149 EACalcDone, 150 IsUncacheable, 151 ReqMade, 152 MemOpDone, 153 MaxFlags 154 }; 155 156 public: 157 /** The sequence number of the instruction. */ 158 InstSeqNum seqNum; 159 160 /** The StaticInst used by this BaseDynInst. */ 161 StaticInstPtr staticInst; 162 163 /** Pointer to the Impl's CPU object. */ 164 ImplCPU *cpu; 165 166 /** Pointer to the thread state. */ 167 ImplState *thread; 168 169 /** The kind of fault this instruction has generated. */ 170 Fault fault; 171 172 /** InstRecord that tracks this instructions. */ 173 Trace::InstRecord *traceData; 174 175 protected: 176 /** The result of the instruction; assumes an instruction can have many 177 * destination registers. 178 */ 179 std::queue<Result> instResult; 180 181 /** PC state for this instruction. */ 182 TheISA::PCState pc; 183 184 /* An amalgamation of a lot of boolean values into one */ 185 std::bitset<MaxFlags> instFlags; 186 187 /** The status of this BaseDynInst. Several bits can be set. */ 188 std::bitset<NumStatus> status; 189 190 /** Whether or not the source register is ready. 191 * @todo: Not sure this should be here vs the derived class. 192 */ 193 std::bitset<MaxInstSrcRegs> _readySrcRegIdx; 194 195 public: 196 /** The thread this instruction is from. */ 197 ThreadID threadNumber; 198 199 /** Iterator pointing to this BaseDynInst in the list of all insts. */ 200 ListIt instListIt; 201 202 ////////////////////// Branch Data /////////////// 203 /** Predicted PC state after this instruction. */ 204 TheISA::PCState predPC; 205 206 /** The Macroop if one exists */ 207 StaticInstPtr macroop; 208 209 /** How many source registers are ready. */ 210 uint8_t readyRegs; 211 212 public: 213 /////////////////////// Load Store Data ////////////////////// 214 /** The effective virtual address (lds & stores only). */ 215 Addr effAddr; 216 217 /** The effective physical address. */ 218 Addr physEffAddr; 219 220 /** The memory request flags (from translation). */ 221 unsigned memReqFlags; 222 223 /** data address space ID, for loads & stores. */ 224 short asid; 225 226 /** The size of the request */ 227 uint8_t effSize; 228 229 /** Pointer to the data for the memory access. */ 230 uint8_t *memData; 231 232 /** Load queue index. */ 233 int16_t lqIdx; 234 235 /** Store queue index. */ 236 int16_t sqIdx; 237 238 239 /////////////////////// TLB Miss ////////////////////// 240 /** 241 * Saved memory requests (needed when the DTB address translation is 242 * delayed due to a hw page table walk). 243 */ 244 RequestPtr savedReq; 245 RequestPtr savedSreqLow; 246 RequestPtr savedSreqHigh; 247 248 /////////////////////// Checker ////////////////////// 249 // Need a copy of main request pointer to verify on writes. 250 RequestPtr reqToVerify; 251 252 private: 253 /** Instruction effective address. 254 * @todo: Consider if this is necessary or not. 255 */ 256 Addr instEffAddr; 257 258 protected: 259 /** Flattened register index of the destination registers of this 260 * instruction. 261 */ 262 TheISA::RegIndex _flatDestRegIdx[TheISA::MaxInstDestRegs]; 263 264 /** Physical register index of the destination registers of this 265 * instruction. 266 */ 267 PhysRegIndex _destRegIdx[TheISA::MaxInstDestRegs]; 268 269 /** Physical register index of the source registers of this 270 * instruction. 271 */ 272 PhysRegIndex _srcRegIdx[TheISA::MaxInstSrcRegs]; 273 274 /** Physical register index of the previous producers of the 275 * architected destinations. 276 */ 277 PhysRegIndex _prevDestRegIdx[TheISA::MaxInstDestRegs]; 278 279 280 public: 281 /** Records changes to result? */ 282 void recordResult(bool f) { instFlags[RecordResult] = f; } 283 284 /** Is the effective virtual address valid. */ 285 bool effAddrValid() const { return instFlags[EffAddrValid]; } 286 287 /** Whether or not the memory operation is done. */ 288 bool memOpDone() const { return instFlags[MemOpDone]; } 289 void memOpDone(bool f) { instFlags[MemOpDone] = f; } 290 291 292 //////////////////////////////////////////// 293 // 294 // INSTRUCTION EXECUTION 295 // 296 //////////////////////////////////////////// 297 298 void demapPage(Addr vaddr, uint64_t asn) 299 { 300 cpu->demapPage(vaddr, asn); 301 } 302 void demapInstPage(Addr vaddr, uint64_t asn) 303 { 304 cpu->demapPage(vaddr, asn); 305 } 306 void demapDataPage(Addr vaddr, uint64_t asn) 307 { 308 cpu->demapPage(vaddr, asn); 309 } 310 311 Fault readMem(Addr addr, uint8_t *data, unsigned size, unsigned flags); 312 313 Fault writeMem(uint8_t *data, unsigned size, 314 Addr addr, unsigned flags, uint64_t *res); 315 316 /** Splits a request in two if it crosses a dcache block. */ 317 void splitRequest(RequestPtr req, RequestPtr &sreqLow, 318 RequestPtr &sreqHigh); 319 320 /** Initiate a DTB address translation. */ 321 void initiateTranslation(RequestPtr req, RequestPtr sreqLow, 322 RequestPtr sreqHigh, uint64_t *res, 323 BaseTLB::Mode mode); 324 325 /** Finish a DTB address translation. */ 326 void finishTranslation(WholeTranslationState *state); 327 328 /** True if the DTB address translation has started. */ 329 bool translationStarted() const { return instFlags[TranslationStarted]; } 330 void translationStarted(bool f) { instFlags[TranslationStarted] = f; } 331 332 /** True if the DTB address translation has completed. */ 333 bool translationCompleted() const { return instFlags[TranslationCompleted]; } 334 void translationCompleted(bool f) { instFlags[TranslationCompleted] = f; } 335 336 /** True if this address was found to match a previous load and they issued 337 * out of order. If that happend, then it's only a problem if an incoming 338 * snoop invalidate modifies the line, in which case we need to squash. 339 * If nothing modified the line the order doesn't matter. 340 */ 341 bool possibleLoadViolation() const { return instFlags[PossibleLoadViolation]; } 342 void possibleLoadViolation(bool f) { instFlags[PossibleLoadViolation] = f; } 343 344 /** True if the address hit a external snoop while sitting in the LSQ. 345 * If this is true and a older instruction sees it, this instruction must 346 * reexecute 347 */ 348 bool hitExternalSnoop() const { return instFlags[HitExternalSnoop]; } 349 void hitExternalSnoop(bool f) { instFlags[HitExternalSnoop] = f; } 350 351 /** 352 * Returns true if the DTB address translation is being delayed due to a hw 353 * page table walk. 354 */ 355 bool isTranslationDelayed() const 356 { 357 return (translationStarted() && !translationCompleted()); 358 } 359 360 public: 361#ifdef DEBUG 362 void dumpSNList(); 363#endif 364 365 /** Returns the physical register index of the i'th destination 366 * register. 367 */ 368 PhysRegIndex renamedDestRegIdx(int idx) const 369 { 370 return _destRegIdx[idx]; 371 } 372 373 /** Returns the physical register index of the i'th source register. */ 374 PhysRegIndex renamedSrcRegIdx(int idx) const 375 { 376 assert(TheISA::MaxInstSrcRegs > idx); 377 return _srcRegIdx[idx]; 378 } 379 380 /** Returns the flattened register index of the i'th destination 381 * register. 382 */ 383 TheISA::RegIndex flattenedDestRegIdx(int idx) const 384 { 385 return _flatDestRegIdx[idx]; 386 } 387 388 /** Returns the physical register index of the previous physical register 389 * that remapped to the same logical register index. 390 */ 391 PhysRegIndex prevDestRegIdx(int idx) const 392 { 393 return _prevDestRegIdx[idx]; 394 } 395 396 /** Renames a destination register to a physical register. Also records 397 * the previous physical register that the logical register mapped to. 398 */ 399 void renameDestReg(int idx, 400 PhysRegIndex renamed_dest, 401 PhysRegIndex previous_rename) 402 { 403 _destRegIdx[idx] = renamed_dest; 404 _prevDestRegIdx[idx] = previous_rename; 405 } 406 407 /** Renames a source logical register to the physical register which 408 * has/will produce that logical register's result. 409 * @todo: add in whether or not the source register is ready. 410 */ 411 void renameSrcReg(int idx, PhysRegIndex renamed_src) 412 { 413 _srcRegIdx[idx] = renamed_src; 414 } 415 416 /** Flattens a destination architectural register index into a logical 417 * index. 418 */ 419 void flattenDestReg(int idx, TheISA::RegIndex flattened_dest) 420 { 421 _flatDestRegIdx[idx] = flattened_dest; 422 } 423 /** BaseDynInst constructor given a binary instruction. 424 * @param staticInst A StaticInstPtr to the underlying instruction. 425 * @param pc The PC state for the instruction. 426 * @param predPC The predicted next PC state for the instruction. 427 * @param seq_num The sequence number of the instruction. 428 * @param cpu Pointer to the instruction's CPU. 429 */ 430 BaseDynInst(StaticInstPtr staticInst, StaticInstPtr macroop, 431 TheISA::PCState pc, TheISA::PCState predPC, 432 InstSeqNum seq_num, ImplCPU *cpu); 433 434 /** BaseDynInst constructor given a StaticInst pointer. 435 * @param _staticInst The StaticInst for this BaseDynInst. 436 */ 437 BaseDynInst(StaticInstPtr staticInst, StaticInstPtr macroop); 438 439 /** BaseDynInst destructor. */ 440 ~BaseDynInst(); 441 442 private: 443 /** Function to initialize variables in the constructors. */ 444 void initVars(); 445 446 public: 447 /** Dumps out contents of this BaseDynInst. */ 448 void dump(); 449 450 /** Dumps out contents of this BaseDynInst into given string. */ 451 void dump(std::string &outstring); 452 453 /** Read this CPU's ID. */ 454 int cpuId() { return cpu->cpuId(); } 455 456 /** Read this CPU's data requestor ID */ 457 MasterID masterId() { return cpu->dataMasterId(); } 458 459 /** Read this context's system-wide ID **/ 460 int contextId() { return thread->contextId(); } 461 462 /** Returns the fault type. */ 463 Fault getFault() { return fault; } 464 465 /** Checks whether or not this instruction has had its branch target 466 * calculated yet. For now it is not utilized and is hacked to be 467 * always false. 468 * @todo: Actually use this instruction. 469 */ 470 bool doneTargCalc() { return false; } 471 472 /** Set the predicted target of this current instruction. */ 473 void setPredTarg(const TheISA::PCState &_predPC) 474 { 475 predPC = _predPC; 476 } 477 478 const TheISA::PCState &readPredTarg() { return predPC; } 479 480 /** Returns the predicted PC immediately after the branch. */ 481 Addr predInstAddr() { return predPC.instAddr(); } 482 483 /** Returns the predicted PC two instructions after the branch */ 484 Addr predNextInstAddr() { return predPC.nextInstAddr(); } 485 486 /** Returns the predicted micro PC after the branch */ 487 Addr predMicroPC() { return predPC.microPC(); } 488 489 /** Returns whether the instruction was predicted taken or not. */ 490 bool readPredTaken() 491 { 492 return instFlags[PredTaken]; 493 } 494 495 void setPredTaken(bool predicted_taken) 496 { 497 instFlags[PredTaken] = predicted_taken; 498 } 499 500 /** Returns whether the instruction mispredicted. */ 501 bool mispredicted() 502 { 503 TheISA::PCState tempPC = pc; 504 TheISA::advancePC(tempPC, staticInst); 505 return !(tempPC == predPC); 506 } 507 508 // 509 // Instruction types. Forward checks to StaticInst object. 510 // 511 bool isNop() const { return staticInst->isNop(); } 512 bool isMemRef() const { return staticInst->isMemRef(); } 513 bool isLoad() const { return staticInst->isLoad(); } 514 bool isStore() const { return staticInst->isStore(); } 515 bool isStoreConditional() const 516 { return staticInst->isStoreConditional(); } 517 bool isInstPrefetch() const { return staticInst->isInstPrefetch(); } 518 bool isDataPrefetch() const { return staticInst->isDataPrefetch(); } 519 bool isInteger() const { return staticInst->isInteger(); } 520 bool isFloating() const { return staticInst->isFloating(); } 521 bool isControl() const { return staticInst->isControl(); } 522 bool isCall() const { return staticInst->isCall(); } 523 bool isReturn() const { return staticInst->isReturn(); } 524 bool isDirectCtrl() const { return staticInst->isDirectCtrl(); } 525 bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); } 526 bool isCondCtrl() const { return staticInst->isCondCtrl(); } 527 bool isUncondCtrl() const { return staticInst->isUncondCtrl(); } 528 bool isCondDelaySlot() const { return staticInst->isCondDelaySlot(); } 529 bool isThreadSync() const { return staticInst->isThreadSync(); } 530 bool isSerializing() const { return staticInst->isSerializing(); } 531 bool isSerializeBefore() const 532 { return staticInst->isSerializeBefore() || status[SerializeBefore]; } 533 bool isSerializeAfter() const 534 { return staticInst->isSerializeAfter() || status[SerializeAfter]; } 535 bool isSquashAfter() const { return staticInst->isSquashAfter(); } 536 bool isMemBarrier() const { return staticInst->isMemBarrier(); } 537 bool isWriteBarrier() const { return staticInst->isWriteBarrier(); } 538 bool isNonSpeculative() const { return staticInst->isNonSpeculative(); } 539 bool isQuiesce() const { return staticInst->isQuiesce(); } 540 bool isIprAccess() const { return staticInst->isIprAccess(); } 541 bool isUnverifiable() const { return staticInst->isUnverifiable(); } 542 bool isSyscall() const { return staticInst->isSyscall(); } 543 bool isMacroop() const { return staticInst->isMacroop(); } 544 bool isMicroop() const { return staticInst->isMicroop(); } 545 bool isDelayedCommit() const { return staticInst->isDelayedCommit(); } 546 bool isLastMicroop() const { return staticInst->isLastMicroop(); } 547 bool isFirstMicroop() const { return staticInst->isFirstMicroop(); } 548 bool isMicroBranch() const { return staticInst->isMicroBranch(); } 549 550 /** Temporarily sets this instruction as a serialize before instruction. */ 551 void setSerializeBefore() { status.set(SerializeBefore); } 552 553 /** Clears the serializeBefore part of this instruction. */ 554 void clearSerializeBefore() { status.reset(SerializeBefore); } 555 556 /** Checks if this serializeBefore is only temporarily set. */ 557 bool isTempSerializeBefore() { return status[SerializeBefore]; } 558 559 /** Temporarily sets this instruction as a serialize after instruction. */ 560 void setSerializeAfter() { status.set(SerializeAfter); } 561 562 /** Clears the serializeAfter part of this instruction.*/ 563 void clearSerializeAfter() { status.reset(SerializeAfter); } 564 565 /** Checks if this serializeAfter is only temporarily set. */ 566 bool isTempSerializeAfter() { return status[SerializeAfter]; } 567 568 /** Sets the serialization part of this instruction as handled. */ 569 void setSerializeHandled() { status.set(SerializeHandled); } 570 571 /** Checks if the serialization part of this instruction has been 572 * handled. This does not apply to the temporary serializing 573 * state; it only applies to this instruction's own permanent 574 * serializing state. 575 */ 576 bool isSerializeHandled() { return status[SerializeHandled]; } 577 578 /** Returns the opclass of this instruction. */ 579 OpClass opClass() const { return staticInst->opClass(); } 580 581 /** Returns the branch target address. */ 582 TheISA::PCState branchTarget() const 583 { return staticInst->branchTarget(pc); } 584 585 /** Returns the number of source registers. */ 586 int8_t numSrcRegs() const { return staticInst->numSrcRegs(); } 587 588 /** Returns the number of destination registers. */ 589 int8_t numDestRegs() const { return staticInst->numDestRegs(); } 590 591 // the following are used to track physical register usage 592 // for machines with separate int & FP reg files 593 int8_t numFPDestRegs() const { return staticInst->numFPDestRegs(); } 594 int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); } 595 596 /** Returns the logical register index of the i'th destination register. */ 597 RegIndex destRegIdx(int i) const { return staticInst->destRegIdx(i); } 598 599 /** Returns the logical register index of the i'th source register. */ 600 RegIndex srcRegIdx(int i) const { return staticInst->srcRegIdx(i); } 601 602 /** Pops a result off the instResult queue */ 603 template <class T> 604 void popResult(T& t) 605 { 606 if (!instResult.empty()) { 607 instResult.front().get(t); 608 instResult.pop(); 609 } 610 } 611 612 /** Read the most recent result stored by this instruction */ 613 template <class T> 614 void readResult(T& t) 615 { 616 instResult.back().get(t); 617 } 618 619 /** Pushes a result onto the instResult queue */ 620 template <class T> 621 void setResult(T t) 622 { 623 if (instFlags[RecordResult]) { 624 Result instRes; 625 instRes.set(t); 626 instResult.push(instRes); 627 } 628 } 629 630 /** Records an integer register being set to a value. */ 631 void setIntRegOperand(const StaticInst *si, int idx, uint64_t val) 632 { 633 setResult<uint64_t>(val); 634 } 635 636 /** Records an fp register being set to a value. */ 637 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val, 638 int width) 639 { 640 if (width == 32 || width == 64) { 641 setResult<double>(val); 642 } else { 643 panic("Unsupported width!"); 644 } 645 } 646 647 /** Records an fp register being set to a value. */ 648 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val) 649 { 650 setResult<double>(val); 651 } 652 653 /** Records an fp register being set to an integer value. */ 654 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val, 655 int width) 656 { 657 setResult<uint64_t>(val); 658 } 659 660 /** Records an fp register being set to an integer value. */ 661 void setFloatRegOperandBits(const StaticInst *si, int idx, uint64_t val) 662 { 663 setResult<uint64_t>(val); 664 } 665 666 /** Records that one of the source registers is ready. */ 667 void markSrcRegReady(); 668 669 /** Marks a specific register as ready. */ 670 void markSrcRegReady(RegIndex src_idx); 671 672 /** Returns if a source register is ready. */ 673 bool isReadySrcRegIdx(int idx) const 674 { 675 return this->_readySrcRegIdx[idx]; 676 } 677 678 /** Sets this instruction as completed. */ 679 void setCompleted() { status.set(Completed); } 680 681 /** Returns whether or not this instruction is completed. */ 682 bool isCompleted() const { return status[Completed]; } 683 684 /** Marks the result as ready. */ 685 void setResultReady() { status.set(ResultReady); } 686 687 /** Returns whether or not the result is ready. */ 688 bool isResultReady() const { return status[ResultReady]; } 689 690 /** Sets this instruction as ready to issue. */ 691 void setCanIssue() { status.set(CanIssue); } 692 693 /** Returns whether or not this instruction is ready to issue. */ 694 bool readyToIssue() const { return status[CanIssue]; } 695 696 /** Clears this instruction being able to issue. */ 697 void clearCanIssue() { status.reset(CanIssue); } 698 699 /** Sets this instruction as issued from the IQ. */ 700 void setIssued() { status.set(Issued); } 701 702 /** Returns whether or not this instruction has issued. */ 703 bool isIssued() const { return status[Issued]; } 704 705 /** Clears this instruction as being issued. */ 706 void clearIssued() { status.reset(Issued); } 707 708 /** Sets this instruction as executed. */ 709 void setExecuted() { status.set(Executed); } 710 711 /** Returns whether or not this instruction has executed. */ 712 bool isExecuted() const { return status[Executed]; } 713 714 /** Sets this instruction as ready to commit. */ 715 void setCanCommit() { status.set(CanCommit); } 716 717 /** Clears this instruction as being ready to commit. */ 718 void clearCanCommit() { status.reset(CanCommit); } 719 720 /** Returns whether or not this instruction is ready to commit. */ 721 bool readyToCommit() const { return status[CanCommit]; } 722 723 void setAtCommit() { status.set(AtCommit); } 724 725 bool isAtCommit() { return status[AtCommit]; } 726 727 /** Sets this instruction as committed. */ 728 void setCommitted() { status.set(Committed); } 729 730 /** Returns whether or not this instruction is committed. */ 731 bool isCommitted() const { return status[Committed]; } 732 733 /** Sets this instruction as squashed. */ 734 void setSquashed() { status.set(Squashed); } 735 736 /** Returns whether or not this instruction is squashed. */ 737 bool isSquashed() const { return status[Squashed]; } 738 739 //Instruction Queue Entry 740 //----------------------- 741 /** Sets this instruction as a entry the IQ. */ 742 void setInIQ() { status.set(IqEntry); } 743 744 /** Sets this instruction as a entry the IQ. */ 745 void clearInIQ() { status.reset(IqEntry); } 746 747 /** Returns whether or not this instruction has issued. */ 748 bool isInIQ() const { return status[IqEntry]; } 749 750 /** Sets this instruction as squashed in the IQ. */ 751 void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);} 752 753 /** Returns whether or not this instruction is squashed in the IQ. */ 754 bool isSquashedInIQ() const { return status[SquashedInIQ]; } 755 756 757 //Load / Store Queue Functions 758 //----------------------- 759 /** Sets this instruction as a entry the LSQ. */ 760 void setInLSQ() { status.set(LsqEntry); } 761 762 /** Sets this instruction as a entry the LSQ. */ 763 void removeInLSQ() { status.reset(LsqEntry); } 764 765 /** Returns whether or not this instruction is in the LSQ. */ 766 bool isInLSQ() const { return status[LsqEntry]; } 767 768 /** Sets this instruction as squashed in the LSQ. */ 769 void setSquashedInLSQ() { status.set(SquashedInLSQ);} 770 771 /** Returns whether or not this instruction is squashed in the LSQ. */ 772 bool isSquashedInLSQ() const { return status[SquashedInLSQ]; } 773 774 775 //Reorder Buffer Functions 776 //----------------------- 777 /** Sets this instruction as a entry the ROB. */ 778 void setInROB() { status.set(RobEntry); } 779 780 /** Sets this instruction as a entry the ROB. */ 781 void clearInROB() { status.reset(RobEntry); } 782 783 /** Returns whether or not this instruction is in the ROB. */ 784 bool isInROB() const { return status[RobEntry]; } 785 786 /** Sets this instruction as squashed in the ROB. */ 787 void setSquashedInROB() { status.set(SquashedInROB); } 788 789 /** Returns whether or not this instruction is squashed in the ROB. */ 790 bool isSquashedInROB() const { return status[SquashedInROB]; } 791 792 /** Read the PC state of this instruction. */ 793 const TheISA::PCState pcState() const { return pc; } 794 795 /** Set the PC state of this instruction. */ 796 const void pcState(const TheISA::PCState &val) { pc = val; } 797 798 /** Read the PC of this instruction. */ 799 const Addr instAddr() const { return pc.instAddr(); } 800 801 /** Read the PC of the next instruction. */ 802 const Addr nextInstAddr() const { return pc.nextInstAddr(); } 803 804 /**Read the micro PC of this instruction. */ 805 const Addr microPC() const { return pc.microPC(); } 806 807 bool readPredicate() 808 { 809 return instFlags[Predicate]; 810 } 811 812 void setPredicate(bool val) 813 { 814 instFlags[Predicate] = val; 815 816 if (traceData) { 817 traceData->setPredicate(val); 818 } 819 } 820 821 /** Sets the ASID. */ 822 void setASID(short addr_space_id) { asid = addr_space_id; } 823 824 /** Sets the thread id. */ 825 void setTid(ThreadID tid) { threadNumber = tid; } 826 827 /** Sets the pointer to the thread state. */ 828 void setThreadState(ImplState *state) { thread = state; } 829 830 /** Returns the thread context. */ 831 ThreadContext *tcBase() { return thread->getTC(); } 832 833 public: 834 /** Sets the effective address. */ 835 void setEA(Addr &ea) { instEffAddr = ea; instFlags[EACalcDone] = true; } 836 837 /** Returns the effective address. */ 838 const Addr &getEA() const { return instEffAddr; } 839 840 /** Returns whether or not the eff. addr. calculation has been completed. */ 841 bool doneEACalc() { return instFlags[EACalcDone]; } 842 843 /** Returns whether or not the eff. addr. source registers are ready. */ 844 bool eaSrcsReady(); 845 846 /** Is this instruction's memory access uncacheable. */ 847 bool uncacheable() { return instFlags[IsUncacheable]; } 848 849 /** Has this instruction generated a memory request. */ 850 bool hasRequest() { return instFlags[ReqMade]; } 851 852 /** Returns iterator to this instruction in the list of all insts. */ 853 ListIt &getInstListIt() { return instListIt; } 854 855 /** Sets iterator for this instruction in the list of all insts. */ 856 void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; } 857 858 public: 859 /** Returns the number of consecutive store conditional failures. */ 860 unsigned readStCondFailures() 861 { return thread->storeCondFailures; } 862 863 /** Sets the number of consecutive store conditional failures. */ 864 void setStCondFailures(unsigned sc_failures) 865 { thread->storeCondFailures = sc_failures; } 866}; 867 868template<class Impl> 869Fault 870BaseDynInst<Impl>::readMem(Addr addr, uint8_t *data, 871 unsigned size, unsigned flags) 872{ 873 instFlags[ReqMade] = true; 874 Request *req = NULL; 875 Request *sreqLow = NULL; 876 Request *sreqHigh = NULL; 877 878 if (instFlags[ReqMade] && translationStarted()) { 879 req = savedReq; 880 sreqLow = savedSreqLow; 881 sreqHigh = savedSreqHigh; 882 } else { 883 req = new Request(asid, addr, size, flags, masterId(), this->pc.instAddr(), 884 thread->contextId(), threadNumber); 885 886 // Only split the request if the ISA supports unaligned accesses. 887 if (TheISA::HasUnalignedMemAcc) { 888 splitRequest(req, sreqLow, sreqHigh); 889 } 890 initiateTranslation(req, sreqLow, sreqHigh, NULL, BaseTLB::Read); 891 } 892 893 if (translationCompleted()) { 894 if (fault == NoFault) { 895 effAddr = req->getVaddr(); 896 effSize = size; 897 instFlags[EffAddrValid] = true; 898 899 if (cpu->checker) { 900 if (reqToVerify != NULL) { 901 delete reqToVerify; 902 } 903 reqToVerify = new Request(*req); 904 } 905 fault = cpu->read(req, sreqLow, sreqHigh, data, lqIdx); 906 } else { 907 // Commit will have to clean up whatever happened. Set this 908 // instruction as executed. 909 this->setExecuted(); 910 } 911 912 if (fault != NoFault) { 913 // Return a fixed value to keep simulation deterministic even 914 // along misspeculated paths. 915 if (data) 916 bzero(data, size); 917 } 918 } 919 920 if (traceData) { 921 traceData->setAddr(addr); 922 } 923 924 return fault; 925} 926 927template<class Impl> 928Fault 929BaseDynInst<Impl>::writeMem(uint8_t *data, unsigned size, 930 Addr addr, unsigned flags, uint64_t *res) 931{ 932 if (traceData) { 933 traceData->setAddr(addr); 934 } 935 936 instFlags[ReqMade] = true; 937 Request *req = NULL; 938 Request *sreqLow = NULL; 939 Request *sreqHigh = NULL; 940 941 if (instFlags[ReqMade] && translationStarted()) { 942 req = savedReq; 943 sreqLow = savedSreqLow; 944 sreqHigh = savedSreqHigh; 945 } else { 946 req = new Request(asid, addr, size, flags, masterId(), this->pc.instAddr(), 947 thread->contextId(), threadNumber); 948 949 // Only split the request if the ISA supports unaligned accesses. 950 if (TheISA::HasUnalignedMemAcc) { 951 splitRequest(req, sreqLow, sreqHigh); 952 } 953 initiateTranslation(req, sreqLow, sreqHigh, res, BaseTLB::Write); 954 } 955 956 if (fault == NoFault && translationCompleted()) { 957 effAddr = req->getVaddr(); 958 effSize = size; 959 instFlags[EffAddrValid] = true; 960 961 if (cpu->checker) { 962 if (reqToVerify != NULL) { 963 delete reqToVerify; 964 } 965 reqToVerify = new Request(*req); 966 } 967 fault = cpu->write(req, sreqLow, sreqHigh, data, sqIdx); 968 } 969 970 return fault; 971} 972 973template<class Impl> 974inline void 975BaseDynInst<Impl>::splitRequest(RequestPtr req, RequestPtr &sreqLow, 976 RequestPtr &sreqHigh) 977{ 978 // Check to see if the request crosses the next level block boundary. 979 unsigned block_size = cpu->getDataPort().peerBlockSize(); 980 Addr addr = req->getVaddr(); 981 Addr split_addr = roundDown(addr + req->getSize() - 1, block_size); 982 assert(split_addr <= addr || split_addr - addr < block_size); 983 984 // Spans two blocks. 985 if (split_addr > addr) { 986 req->splitOnVaddr(split_addr, sreqLow, sreqHigh); 987 } 988} 989 990template<class Impl> 991inline void 992BaseDynInst<Impl>::initiateTranslation(RequestPtr req, RequestPtr sreqLow, 993 RequestPtr sreqHigh, uint64_t *res, 994 BaseTLB::Mode mode) 995{ 996 translationStarted(true); 997 998 if (!TheISA::HasUnalignedMemAcc || sreqLow == NULL) { 999 WholeTranslationState *state = 1000 new WholeTranslationState(req, NULL, res, mode); 1001 1002 // One translation if the request isn't split. 1003 DataTranslation<BaseDynInstPtr> *trans = 1004 new DataTranslation<BaseDynInstPtr>(this, state); 1005 cpu->dtb->translateTiming(req, thread->getTC(), trans, mode); 1006 if (!translationCompleted()) { 1007 // Save memory requests. 1008 savedReq = state->mainReq; 1009 savedSreqLow = state->sreqLow; 1010 savedSreqHigh = state->sreqHigh; 1011 } 1012 } else { 1013 WholeTranslationState *state = 1014 new WholeTranslationState(req, sreqLow, sreqHigh, NULL, res, mode); 1015 1016 // Two translations when the request is split. 1017 DataTranslation<BaseDynInstPtr> *stransLow = 1018 new DataTranslation<BaseDynInstPtr>(this, state, 0); 1019 DataTranslation<BaseDynInstPtr> *stransHigh = 1020 new DataTranslation<BaseDynInstPtr>(this, state, 1); 1021 1022 cpu->dtb->translateTiming(sreqLow, thread->getTC(), stransLow, mode); 1023 cpu->dtb->translateTiming(sreqHigh, thread->getTC(), stransHigh, mode); 1024 if (!translationCompleted()) { 1025 // Save memory requests. 1026 savedReq = state->mainReq; 1027 savedSreqLow = state->sreqLow; 1028 savedSreqHigh = state->sreqHigh; 1029 } 1030 } 1031} 1032 1033template<class Impl> 1034inline void 1035BaseDynInst<Impl>::finishTranslation(WholeTranslationState *state) 1036{ 1037 fault = state->getFault(); 1038 1039 instFlags[IsUncacheable] = state->isUncacheable(); 1040 1041 if (fault == NoFault) { 1042 physEffAddr = state->getPaddr(); 1043 memReqFlags = state->getFlags(); 1044 1045 if (state->mainReq->isCondSwap()) { 1046 assert(state->res); 1047 state->mainReq->setExtraData(*state->res); 1048 } 1049 1050 } else { 1051 state->deleteReqs(); 1052 } 1053 delete state; 1054 1055 translationCompleted(true); 1056} 1057 1058#endif // __CPU_BASE_DYN_INST_HH__ 1059