base_dyn_inst.hh revision 12420:f5c80f4ed41f
1/* 2 * Copyright (c) 2011,2013,2016 ARM Limited 3 * Copyright (c) 2013 Advanced Micro Devices, Inc. 4 * All rights reserved. 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, 13 * modified or unmodified, in source code or in binary form. 14 * 15 * Copyright (c) 2004-2006 The Regents of The University of Michigan 16 * Copyright (c) 2009 The University of Edinburgh 17 * All rights reserved. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions are 21 * met: redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer; 23 * redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution; 26 * neither the name of the copyright holders nor the names of its 27 * contributors may be used to endorse or promote products derived from 28 * this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 * 42 * Authors: Kevin Lim 43 * Timothy M. Jones 44 */ 45 46#ifndef __CPU_BASE_DYN_INST_HH__ 47#define __CPU_BASE_DYN_INST_HH__ 48 49#include <array> 50#include <bitset> 51#include <deque> 52#include <list> 53#include <string> 54 55#include "arch/generic/tlb.hh" 56#include "arch/utility.hh" 57#include "base/trace.hh" 58#include "config/the_isa.hh" 59#include "cpu/checker/cpu.hh" 60#include "cpu/exec_context.hh" 61#include "cpu/exetrace.hh" 62#include "cpu/inst_res.hh" 63#include "cpu/inst_seq.hh" 64#include "cpu/o3/comm.hh" 65#include "cpu/op_class.hh" 66#include "cpu/static_inst.hh" 67#include "cpu/translation.hh" 68#include "mem/packet.hh" 69#include "mem/request.hh" 70#include "sim/byteswap.hh" 71#include "sim/system.hh" 72 73/** 74 * @file 75 * Defines a dynamic instruction context. 76 */ 77 78template <class Impl> 79class BaseDynInst : public ExecContext, public RefCounted 80{ 81 public: 82 // Typedef for the CPU. 83 typedef typename Impl::CPUType ImplCPU; 84 typedef typename ImplCPU::ImplState ImplState; 85 using VecRegContainer = TheISA::VecRegContainer; 86 87 // The DynInstPtr type. 88 typedef typename Impl::DynInstPtr DynInstPtr; 89 typedef RefCountingPtr<BaseDynInst<Impl> > BaseDynInstPtr; 90 91 // The list of instructions iterator type. 92 typedef typename std::list<DynInstPtr>::iterator ListIt; 93 94 enum { 95 MaxInstSrcRegs = TheISA::MaxInstSrcRegs, /// Max source regs 96 MaxInstDestRegs = TheISA::MaxInstDestRegs /// Max dest regs 97 }; 98 99 protected: 100 enum Status { 101 IqEntry, /// Instruction is in the IQ 102 RobEntry, /// Instruction is in the ROB 103 LsqEntry, /// Instruction is in the LSQ 104 Completed, /// Instruction has completed 105 ResultReady, /// Instruction has its result 106 CanIssue, /// Instruction can issue and execute 107 Issued, /// Instruction has issued 108 Executed, /// Instruction has executed 109 CanCommit, /// Instruction can commit 110 AtCommit, /// Instruction has reached commit 111 Committed, /// Instruction has committed 112 Squashed, /// Instruction is squashed 113 SquashedInIQ, /// Instruction is squashed in the IQ 114 SquashedInLSQ, /// Instruction is squashed in the LSQ 115 SquashedInROB, /// Instruction is squashed in the ROB 116 RecoverInst, /// Is a recover instruction 117 BlockingInst, /// Is a blocking instruction 118 ThreadsyncWait, /// Is a thread synchronization instruction 119 SerializeBefore, /// Needs to serialize on 120 /// instructions ahead of it 121 SerializeAfter, /// Needs to serialize instructions behind it 122 SerializeHandled, /// Serialization has been handled 123 NumStatus 124 }; 125 126 enum Flags { 127 TranslationStarted, 128 TranslationCompleted, 129 PossibleLoadViolation, 130 HitExternalSnoop, 131 EffAddrValid, 132 RecordResult, 133 Predicate, 134 PredTaken, 135 IsStrictlyOrdered, 136 ReqMade, 137 MemOpDone, 138 MaxFlags 139 }; 140 141 public: 142 /** The sequence number of the instruction. */ 143 InstSeqNum seqNum; 144 145 /** The StaticInst used by this BaseDynInst. */ 146 const StaticInstPtr staticInst; 147 148 /** Pointer to the Impl's CPU object. */ 149 ImplCPU *cpu; 150 151 BaseCPU *getCpuPtr() { return cpu; } 152 153 /** Pointer to the thread state. */ 154 ImplState *thread; 155 156 /** The kind of fault this instruction has generated. */ 157 Fault fault; 158 159 /** InstRecord that tracks this instructions. */ 160 Trace::InstRecord *traceData; 161 162 protected: 163 /** The result of the instruction; assumes an instruction can have many 164 * destination registers. 165 */ 166 std::queue<InstResult> instResult; 167 168 /** PC state for this instruction. */ 169 TheISA::PCState pc; 170 171 /* An amalgamation of a lot of boolean values into one */ 172 std::bitset<MaxFlags> instFlags; 173 174 /** The status of this BaseDynInst. Several bits can be set. */ 175 std::bitset<NumStatus> status; 176 177 /** Whether or not the source register is ready. 178 * @todo: Not sure this should be here vs the derived class. 179 */ 180 std::bitset<MaxInstSrcRegs> _readySrcRegIdx; 181 182 public: 183 /** The thread this instruction is from. */ 184 ThreadID threadNumber; 185 186 /** Iterator pointing to this BaseDynInst in the list of all insts. */ 187 ListIt instListIt; 188 189 ////////////////////// Branch Data /////////////// 190 /** Predicted PC state after this instruction. */ 191 TheISA::PCState predPC; 192 193 /** The Macroop if one exists */ 194 const StaticInstPtr macroop; 195 196 /** How many source registers are ready. */ 197 uint8_t readyRegs; 198 199 public: 200 /////////////////////// Load Store Data ////////////////////// 201 /** The effective virtual address (lds & stores only). */ 202 Addr effAddr; 203 204 /** The effective physical address. */ 205 Addr physEffAddrLow; 206 207 /** The effective physical address 208 * of the second request for a split request 209 */ 210 Addr physEffAddrHigh; 211 212 /** The memory request flags (from translation). */ 213 unsigned memReqFlags; 214 215 /** data address space ID, for loads & stores. */ 216 short asid; 217 218 /** The size of the request */ 219 uint8_t effSize; 220 221 /** Pointer to the data for the memory access. */ 222 uint8_t *memData; 223 224 /** Load queue index. */ 225 int16_t lqIdx; 226 227 /** Store queue index. */ 228 int16_t sqIdx; 229 230 231 /////////////////////// TLB Miss ////////////////////// 232 /** 233 * Saved memory requests (needed when the DTB address translation is 234 * delayed due to a hw page table walk). 235 */ 236 RequestPtr savedReq; 237 RequestPtr savedSreqLow; 238 RequestPtr savedSreqHigh; 239 240 /////////////////////// Checker ////////////////////// 241 // Need a copy of main request pointer to verify on writes. 242 RequestPtr reqToVerify; 243 244 protected: 245 /** Flattened register index of the destination registers of this 246 * instruction. 247 */ 248 std::array<RegId, TheISA::MaxInstDestRegs> _flatDestRegIdx; 249 250 /** Physical register index of the destination registers of this 251 * instruction. 252 */ 253 std::array<PhysRegIdPtr, TheISA::MaxInstDestRegs> _destRegIdx; 254 255 /** Physical register index of the source registers of this 256 * instruction. 257 */ 258 std::array<PhysRegIdPtr, TheISA::MaxInstSrcRegs> _srcRegIdx; 259 260 /** Physical register index of the previous producers of the 261 * architected destinations. 262 */ 263 std::array<PhysRegIdPtr, TheISA::MaxInstDestRegs> _prevDestRegIdx; 264 265 266 public: 267 /** Records changes to result? */ 268 void recordResult(bool f) { instFlags[RecordResult] = f; } 269 270 /** Is the effective virtual address valid. */ 271 bool effAddrValid() const { return instFlags[EffAddrValid]; } 272 273 /** Whether or not the memory operation is done. */ 274 bool memOpDone() const { return instFlags[MemOpDone]; } 275 void memOpDone(bool f) { instFlags[MemOpDone] = f; } 276 277 278 //////////////////////////////////////////// 279 // 280 // INSTRUCTION EXECUTION 281 // 282 //////////////////////////////////////////// 283 284 void demapPage(Addr vaddr, uint64_t asn) 285 { 286 cpu->demapPage(vaddr, asn); 287 } 288 void demapInstPage(Addr vaddr, uint64_t asn) 289 { 290 cpu->demapPage(vaddr, asn); 291 } 292 void demapDataPage(Addr vaddr, uint64_t asn) 293 { 294 cpu->demapPage(vaddr, asn); 295 } 296 297 Fault initiateMemRead(Addr addr, unsigned size, Request::Flags flags); 298 299 Fault writeMem(uint8_t *data, unsigned size, Addr addr, 300 Request::Flags flags, uint64_t *res); 301 302 /** Splits a request in two if it crosses a dcache block. */ 303 void splitRequest(RequestPtr req, RequestPtr &sreqLow, 304 RequestPtr &sreqHigh); 305 306 /** Initiate a DTB address translation. */ 307 void initiateTranslation(RequestPtr req, RequestPtr sreqLow, 308 RequestPtr sreqHigh, uint64_t *res, 309 BaseTLB::Mode mode); 310 311 /** Finish a DTB address translation. */ 312 void finishTranslation(WholeTranslationState *state); 313 314 /** True if the DTB address translation has started. */ 315 bool translationStarted() const { return instFlags[TranslationStarted]; } 316 void translationStarted(bool f) { instFlags[TranslationStarted] = f; } 317 318 /** True if the DTB address translation has completed. */ 319 bool translationCompleted() const { return instFlags[TranslationCompleted]; } 320 void translationCompleted(bool f) { instFlags[TranslationCompleted] = f; } 321 322 /** True if this address was found to match a previous load and they issued 323 * out of order. If that happend, then it's only a problem if an incoming 324 * snoop invalidate modifies the line, in which case we need to squash. 325 * If nothing modified the line the order doesn't matter. 326 */ 327 bool possibleLoadViolation() const { return instFlags[PossibleLoadViolation]; } 328 void possibleLoadViolation(bool f) { instFlags[PossibleLoadViolation] = f; } 329 330 /** True if the address hit a external snoop while sitting in the LSQ. 331 * If this is true and a older instruction sees it, this instruction must 332 * reexecute 333 */ 334 bool hitExternalSnoop() const { return instFlags[HitExternalSnoop]; } 335 void hitExternalSnoop(bool f) { instFlags[HitExternalSnoop] = f; } 336 337 /** 338 * Returns true if the DTB address translation is being delayed due to a hw 339 * page table walk. 340 */ 341 bool isTranslationDelayed() const 342 { 343 return (translationStarted() && !translationCompleted()); 344 } 345 346 public: 347#ifdef DEBUG 348 void dumpSNList(); 349#endif 350 351 /** Returns the physical register index of the i'th destination 352 * register. 353 */ 354 PhysRegIdPtr renamedDestRegIdx(int idx) const 355 { 356 return _destRegIdx[idx]; 357 } 358 359 /** Returns the physical register index of the i'th source register. */ 360 PhysRegIdPtr renamedSrcRegIdx(int idx) const 361 { 362 assert(TheISA::MaxInstSrcRegs > idx); 363 return _srcRegIdx[idx]; 364 } 365 366 /** Returns the flattened register index of the i'th destination 367 * register. 368 */ 369 const RegId& flattenedDestRegIdx(int idx) const 370 { 371 return _flatDestRegIdx[idx]; 372 } 373 374 /** Returns the physical register index of the previous physical register 375 * that remapped to the same logical register index. 376 */ 377 PhysRegIdPtr prevDestRegIdx(int idx) const 378 { 379 return _prevDestRegIdx[idx]; 380 } 381 382 /** Renames a destination register to a physical register. Also records 383 * the previous physical register that the logical register mapped to. 384 */ 385 void renameDestReg(int idx, 386 PhysRegIdPtr renamed_dest, 387 PhysRegIdPtr previous_rename) 388 { 389 _destRegIdx[idx] = renamed_dest; 390 _prevDestRegIdx[idx] = previous_rename; 391 } 392 393 /** Renames a source logical register to the physical register which 394 * has/will produce that logical register's result. 395 * @todo: add in whether or not the source register is ready. 396 */ 397 void renameSrcReg(int idx, PhysRegIdPtr renamed_src) 398 { 399 _srcRegIdx[idx] = renamed_src; 400 } 401 402 /** Flattens a destination architectural register index into a logical 403 * index. 404 */ 405 void flattenDestReg(int idx, const RegId& flattened_dest) 406 { 407 _flatDestRegIdx[idx] = flattened_dest; 408 } 409 /** BaseDynInst constructor given a binary instruction. 410 * @param staticInst A StaticInstPtr to the underlying instruction. 411 * @param pc The PC state for the instruction. 412 * @param predPC The predicted next PC state for the instruction. 413 * @param seq_num The sequence number of the instruction. 414 * @param cpu Pointer to the instruction's CPU. 415 */ 416 BaseDynInst(const StaticInstPtr &staticInst, const StaticInstPtr ¯oop, 417 TheISA::PCState pc, TheISA::PCState predPC, 418 InstSeqNum seq_num, ImplCPU *cpu); 419 420 /** BaseDynInst constructor given a StaticInst pointer. 421 * @param _staticInst The StaticInst for this BaseDynInst. 422 */ 423 BaseDynInst(const StaticInstPtr &staticInst, const StaticInstPtr ¯oop); 424 425 /** BaseDynInst destructor. */ 426 ~BaseDynInst(); 427 428 private: 429 /** Function to initialize variables in the constructors. */ 430 void initVars(); 431 432 public: 433 /** Dumps out contents of this BaseDynInst. */ 434 void dump(); 435 436 /** Dumps out contents of this BaseDynInst into given string. */ 437 void dump(std::string &outstring); 438 439 /** Read this CPU's ID. */ 440 int cpuId() const { return cpu->cpuId(); } 441 442 /** Read this CPU's Socket ID. */ 443 uint32_t socketId() const { return cpu->socketId(); } 444 445 /** Read this CPU's data requestor ID */ 446 MasterID masterId() const { return cpu->dataMasterId(); } 447 448 /** Read this context's system-wide ID **/ 449 ContextID contextId() const { return thread->contextId(); } 450 451 /** Returns the fault type. */ 452 Fault getFault() const { return fault; } 453 454 /** Checks whether or not this instruction has had its branch target 455 * calculated yet. For now it is not utilized and is hacked to be 456 * always false. 457 * @todo: Actually use this instruction. 458 */ 459 bool doneTargCalc() { return false; } 460 461 /** Set the predicted target of this current instruction. */ 462 void setPredTarg(const TheISA::PCState &_predPC) 463 { 464 predPC = _predPC; 465 } 466 467 const TheISA::PCState &readPredTarg() { return predPC; } 468 469 /** Returns the predicted PC immediately after the branch. */ 470 Addr predInstAddr() { return predPC.instAddr(); } 471 472 /** Returns the predicted PC two instructions after the branch */ 473 Addr predNextInstAddr() { return predPC.nextInstAddr(); } 474 475 /** Returns the predicted micro PC after the branch */ 476 Addr predMicroPC() { return predPC.microPC(); } 477 478 /** Returns whether the instruction was predicted taken or not. */ 479 bool readPredTaken() 480 { 481 return instFlags[PredTaken]; 482 } 483 484 void setPredTaken(bool predicted_taken) 485 { 486 instFlags[PredTaken] = predicted_taken; 487 } 488 489 /** Returns whether the instruction mispredicted. */ 490 bool mispredicted() 491 { 492 TheISA::PCState tempPC = pc; 493 TheISA::advancePC(tempPC, staticInst); 494 return !(tempPC == predPC); 495 } 496 497 // 498 // Instruction types. Forward checks to StaticInst object. 499 // 500 bool isNop() const { return staticInst->isNop(); } 501 bool isMemRef() const { return staticInst->isMemRef(); } 502 bool isLoad() const { return staticInst->isLoad(); } 503 bool isStore() const { return staticInst->isStore(); } 504 bool isStoreConditional() const 505 { return staticInst->isStoreConditional(); } 506 bool isInstPrefetch() const { return staticInst->isInstPrefetch(); } 507 bool isDataPrefetch() const { return staticInst->isDataPrefetch(); } 508 bool isInteger() const { return staticInst->isInteger(); } 509 bool isFloating() const { return staticInst->isFloating(); } 510 bool isVector() const { return staticInst->isVector(); } 511 bool isControl() const { return staticInst->isControl(); } 512 bool isCall() const { return staticInst->isCall(); } 513 bool isReturn() const { return staticInst->isReturn(); } 514 bool isDirectCtrl() const { return staticInst->isDirectCtrl(); } 515 bool isIndirectCtrl() const { return staticInst->isIndirectCtrl(); } 516 bool isCondCtrl() const { return staticInst->isCondCtrl(); } 517 bool isUncondCtrl() const { return staticInst->isUncondCtrl(); } 518 bool isCondDelaySlot() const { return staticInst->isCondDelaySlot(); } 519 bool isThreadSync() const { return staticInst->isThreadSync(); } 520 bool isSerializing() const { return staticInst->isSerializing(); } 521 bool isSerializeBefore() const 522 { return staticInst->isSerializeBefore() || status[SerializeBefore]; } 523 bool isSerializeAfter() const 524 { return staticInst->isSerializeAfter() || status[SerializeAfter]; } 525 bool isSquashAfter() const { return staticInst->isSquashAfter(); } 526 bool isMemBarrier() const { return staticInst->isMemBarrier(); } 527 bool isWriteBarrier() const { return staticInst->isWriteBarrier(); } 528 bool isNonSpeculative() const { return staticInst->isNonSpeculative(); } 529 bool isQuiesce() const { return staticInst->isQuiesce(); } 530 bool isIprAccess() const { return staticInst->isIprAccess(); } 531 bool isUnverifiable() const { return staticInst->isUnverifiable(); } 532 bool isSyscall() const { return staticInst->isSyscall(); } 533 bool isMacroop() const { return staticInst->isMacroop(); } 534 bool isMicroop() const { return staticInst->isMicroop(); } 535 bool isDelayedCommit() const { return staticInst->isDelayedCommit(); } 536 bool isLastMicroop() const { return staticInst->isLastMicroop(); } 537 bool isFirstMicroop() const { return staticInst->isFirstMicroop(); } 538 bool isMicroBranch() const { return staticInst->isMicroBranch(); } 539 540 /** Temporarily sets this instruction as a serialize before instruction. */ 541 void setSerializeBefore() { status.set(SerializeBefore); } 542 543 /** Clears the serializeBefore part of this instruction. */ 544 void clearSerializeBefore() { status.reset(SerializeBefore); } 545 546 /** Checks if this serializeBefore is only temporarily set. */ 547 bool isTempSerializeBefore() { return status[SerializeBefore]; } 548 549 /** Temporarily sets this instruction as a serialize after instruction. */ 550 void setSerializeAfter() { status.set(SerializeAfter); } 551 552 /** Clears the serializeAfter part of this instruction.*/ 553 void clearSerializeAfter() { status.reset(SerializeAfter); } 554 555 /** Checks if this serializeAfter is only temporarily set. */ 556 bool isTempSerializeAfter() { return status[SerializeAfter]; } 557 558 /** Sets the serialization part of this instruction as handled. */ 559 void setSerializeHandled() { status.set(SerializeHandled); } 560 561 /** Checks if the serialization part of this instruction has been 562 * handled. This does not apply to the temporary serializing 563 * state; it only applies to this instruction's own permanent 564 * serializing state. 565 */ 566 bool isSerializeHandled() { return status[SerializeHandled]; } 567 568 /** Returns the opclass of this instruction. */ 569 OpClass opClass() const { return staticInst->opClass(); } 570 571 /** Returns the branch target address. */ 572 TheISA::PCState branchTarget() const 573 { return staticInst->branchTarget(pc); } 574 575 /** Returns the number of source registers. */ 576 int8_t numSrcRegs() const { return staticInst->numSrcRegs(); } 577 578 /** Returns the number of destination registers. */ 579 int8_t numDestRegs() const { return staticInst->numDestRegs(); } 580 581 // the following are used to track physical register usage 582 // for machines with separate int & FP reg files 583 int8_t numFPDestRegs() const { return staticInst->numFPDestRegs(); } 584 int8_t numIntDestRegs() const { return staticInst->numIntDestRegs(); } 585 int8_t numCCDestRegs() const { return staticInst->numCCDestRegs(); } 586 int8_t numVecDestRegs() const { return staticInst->numVecDestRegs(); } 587 int8_t numVecElemDestRegs() const { 588 return staticInst->numVecElemDestRegs(); 589 } 590 591 /** Returns the logical register index of the i'th destination register. */ 592 const RegId& destRegIdx(int i) const { return staticInst->destRegIdx(i); } 593 594 /** Returns the logical register index of the i'th source register. */ 595 const RegId& srcRegIdx(int i) const { return staticInst->srcRegIdx(i); } 596 597 /** Return the size of the instResult queue. */ 598 uint8_t resultSize() { return instResult.size(); } 599 600 /** Pops a result off the instResult queue. 601 * If the result stack is empty, return the default value. 602 * */ 603 InstResult popResult(InstResult dflt = InstResult()) 604 { 605 if (!instResult.empty()) { 606 InstResult t = instResult.front(); 607 instResult.pop(); 608 return t; 609 } 610 return dflt; 611 } 612 613 /** Pushes a result onto the instResult queue. */ 614 /** @{ */ 615 /** Scalar result. */ 616 template<typename T> 617 void setScalarResult(T&& t) 618 { 619 if (instFlags[RecordResult]) { 620 instResult.push(InstResult(std::forward<T>(t), 621 InstResult::ResultType::Scalar)); 622 } 623 } 624 625 /** Full vector result. */ 626 template<typename T> 627 void setVecResult(T&& t) 628 { 629 if (instFlags[RecordResult]) { 630 instResult.push(InstResult(std::forward<T>(t), 631 InstResult::ResultType::VecReg)); 632 } 633 } 634 635 /** Vector element result. */ 636 template<typename T> 637 void setVecElemResult(T&& t) 638 { 639 if (instFlags[RecordResult]) { 640 instResult.push(InstResult(std::forward<T>(t), 641 InstResult::ResultType::VecElem)); 642 } 643 } 644 /** @} */ 645 646 /** Records an integer register being set to a value. */ 647 void setIntRegOperand(const StaticInst *si, int idx, IntReg val) 648 { 649 setScalarResult(val); 650 } 651 652 /** Records a CC register being set to a value. */ 653 void setCCRegOperand(const StaticInst *si, int idx, CCReg val) 654 { 655 setScalarResult(val); 656 } 657 658 /** Records an fp register being set to a value. */ 659 void setFloatRegOperand(const StaticInst *si, int idx, FloatReg val) 660 { 661 setScalarResult(val); 662 } 663 664 /** Record a vector register being set to a value */ 665 void setVecRegOperand(const StaticInst *si, int idx, 666 const VecRegContainer& val) 667 { 668 setVecResult(val); 669 } 670 671 /** Records an fp register being set to an integer value. */ 672 void 673 setFloatRegOperandBits(const StaticInst *si, int idx, FloatRegBits val) 674 { 675 setScalarResult(val); 676 } 677 678 /** Record a vector register being set to a value */ 679 void setVecElemOperand(const StaticInst *si, int idx, const VecElem val) 680 { 681 setVecElemResult(val); 682 } 683 684 /** Records that one of the source registers is ready. */ 685 void markSrcRegReady(); 686 687 /** Marks a specific register as ready. */ 688 void markSrcRegReady(RegIndex src_idx); 689 690 /** Returns if a source register is ready. */ 691 bool isReadySrcRegIdx(int idx) const 692 { 693 return this->_readySrcRegIdx[idx]; 694 } 695 696 /** Sets this instruction as completed. */ 697 void setCompleted() { status.set(Completed); } 698 699 /** Returns whether or not this instruction is completed. */ 700 bool isCompleted() const { return status[Completed]; } 701 702 /** Marks the result as ready. */ 703 void setResultReady() { status.set(ResultReady); } 704 705 /** Returns whether or not the result is ready. */ 706 bool isResultReady() const { return status[ResultReady]; } 707 708 /** Sets this instruction as ready to issue. */ 709 void setCanIssue() { status.set(CanIssue); } 710 711 /** Returns whether or not this instruction is ready to issue. */ 712 bool readyToIssue() const { return status[CanIssue]; } 713 714 /** Clears this instruction being able to issue. */ 715 void clearCanIssue() { status.reset(CanIssue); } 716 717 /** Sets this instruction as issued from the IQ. */ 718 void setIssued() { status.set(Issued); } 719 720 /** Returns whether or not this instruction has issued. */ 721 bool isIssued() const { return status[Issued]; } 722 723 /** Clears this instruction as being issued. */ 724 void clearIssued() { status.reset(Issued); } 725 726 /** Sets this instruction as executed. */ 727 void setExecuted() { status.set(Executed); } 728 729 /** Returns whether or not this instruction has executed. */ 730 bool isExecuted() const { return status[Executed]; } 731 732 /** Sets this instruction as ready to commit. */ 733 void setCanCommit() { status.set(CanCommit); } 734 735 /** Clears this instruction as being ready to commit. */ 736 void clearCanCommit() { status.reset(CanCommit); } 737 738 /** Returns whether or not this instruction is ready to commit. */ 739 bool readyToCommit() const { return status[CanCommit]; } 740 741 void setAtCommit() { status.set(AtCommit); } 742 743 bool isAtCommit() { return status[AtCommit]; } 744 745 /** Sets this instruction as committed. */ 746 void setCommitted() { status.set(Committed); } 747 748 /** Returns whether or not this instruction is committed. */ 749 bool isCommitted() const { return status[Committed]; } 750 751 /** Sets this instruction as squashed. */ 752 void setSquashed() { status.set(Squashed); } 753 754 /** Returns whether or not this instruction is squashed. */ 755 bool isSquashed() const { return status[Squashed]; } 756 757 //Instruction Queue Entry 758 //----------------------- 759 /** Sets this instruction as a entry the IQ. */ 760 void setInIQ() { status.set(IqEntry); } 761 762 /** Sets this instruction as a entry the IQ. */ 763 void clearInIQ() { status.reset(IqEntry); } 764 765 /** Returns whether or not this instruction has issued. */ 766 bool isInIQ() const { return status[IqEntry]; } 767 768 /** Sets this instruction as squashed in the IQ. */ 769 void setSquashedInIQ() { status.set(SquashedInIQ); status.set(Squashed);} 770 771 /** Returns whether or not this instruction is squashed in the IQ. */ 772 bool isSquashedInIQ() const { return status[SquashedInIQ]; } 773 774 775 //Load / Store Queue Functions 776 //----------------------- 777 /** Sets this instruction as a entry the LSQ. */ 778 void setInLSQ() { status.set(LsqEntry); } 779 780 /** Sets this instruction as a entry the LSQ. */ 781 void removeInLSQ() { status.reset(LsqEntry); } 782 783 /** Returns whether or not this instruction is in the LSQ. */ 784 bool isInLSQ() const { return status[LsqEntry]; } 785 786 /** Sets this instruction as squashed in the LSQ. */ 787 void setSquashedInLSQ() { status.set(SquashedInLSQ);} 788 789 /** Returns whether or not this instruction is squashed in the LSQ. */ 790 bool isSquashedInLSQ() const { return status[SquashedInLSQ]; } 791 792 793 //Reorder Buffer Functions 794 //----------------------- 795 /** Sets this instruction as a entry the ROB. */ 796 void setInROB() { status.set(RobEntry); } 797 798 /** Sets this instruction as a entry the ROB. */ 799 void clearInROB() { status.reset(RobEntry); } 800 801 /** Returns whether or not this instruction is in the ROB. */ 802 bool isInROB() const { return status[RobEntry]; } 803 804 /** Sets this instruction as squashed in the ROB. */ 805 void setSquashedInROB() { status.set(SquashedInROB); } 806 807 /** Returns whether or not this instruction is squashed in the ROB. */ 808 bool isSquashedInROB() const { return status[SquashedInROB]; } 809 810 /** Read the PC state of this instruction. */ 811 TheISA::PCState pcState() const { return pc; } 812 813 /** Set the PC state of this instruction. */ 814 void pcState(const TheISA::PCState &val) { pc = val; } 815 816 /** Read the PC of this instruction. */ 817 Addr instAddr() const { return pc.instAddr(); } 818 819 /** Read the PC of the next instruction. */ 820 Addr nextInstAddr() const { return pc.nextInstAddr(); } 821 822 /**Read the micro PC of this instruction. */ 823 Addr microPC() const { return pc.microPC(); } 824 825 bool readPredicate() 826 { 827 return instFlags[Predicate]; 828 } 829 830 void setPredicate(bool val) 831 { 832 instFlags[Predicate] = val; 833 834 if (traceData) { 835 traceData->setPredicate(val); 836 } 837 } 838 839 /** Sets the ASID. */ 840 void setASID(short addr_space_id) { asid = addr_space_id; } 841 842 /** Sets the thread id. */ 843 void setTid(ThreadID tid) { threadNumber = tid; } 844 845 /** Sets the pointer to the thread state. */ 846 void setThreadState(ImplState *state) { thread = state; } 847 848 /** Returns the thread context. */ 849 ThreadContext *tcBase() { return thread->getTC(); } 850 851 public: 852 /** Returns whether or not the eff. addr. source registers are ready. */ 853 bool eaSrcsReady(); 854 855 /** Is this instruction's memory access strictly ordered? */ 856 bool strictlyOrdered() const { return instFlags[IsStrictlyOrdered]; } 857 858 /** Has this instruction generated a memory request. */ 859 bool hasRequest() { return instFlags[ReqMade]; } 860 861 /** Returns iterator to this instruction in the list of all insts. */ 862 ListIt &getInstListIt() { return instListIt; } 863 864 /** Sets iterator for this instruction in the list of all insts. */ 865 void setInstListIt(ListIt _instListIt) { instListIt = _instListIt; } 866 867 public: 868 /** Returns the number of consecutive store conditional failures. */ 869 unsigned int readStCondFailures() const 870 { return thread->storeCondFailures; } 871 872 /** Sets the number of consecutive store conditional failures. */ 873 void setStCondFailures(unsigned int sc_failures) 874 { thread->storeCondFailures = sc_failures; } 875 876 public: 877 // monitor/mwait funtions 878 void armMonitor(Addr address) { cpu->armMonitor(threadNumber, address); } 879 bool mwait(PacketPtr pkt) { return cpu->mwait(threadNumber, pkt); } 880 void mwaitAtomic(ThreadContext *tc) 881 { return cpu->mwaitAtomic(threadNumber, tc, cpu->dtb); } 882 AddressMonitor *getAddrMonitor() 883 { return cpu->getCpuAddrMonitor(threadNumber); } 884}; 885 886template<class Impl> 887Fault 888BaseDynInst<Impl>::initiateMemRead(Addr addr, unsigned size, 889 Request::Flags flags) 890{ 891 instFlags[ReqMade] = true; 892 Request *req = NULL; 893 Request *sreqLow = NULL; 894 Request *sreqHigh = NULL; 895 896 if (instFlags[ReqMade] && translationStarted()) { 897 req = savedReq; 898 sreqLow = savedSreqLow; 899 sreqHigh = savedSreqHigh; 900 } else { 901 req = new Request(asid, addr, size, flags, masterId(), this->pc.instAddr(), 902 thread->contextId()); 903 904 req->taskId(cpu->taskId()); 905 906 // Only split the request if the ISA supports unaligned accesses. 907 if (TheISA::HasUnalignedMemAcc) { 908 splitRequest(req, sreqLow, sreqHigh); 909 } 910 initiateTranslation(req, sreqLow, sreqHigh, NULL, BaseTLB::Read); 911 } 912 913 if (translationCompleted()) { 914 if (fault == NoFault) { 915 effAddr = req->getVaddr(); 916 effSize = size; 917 instFlags[EffAddrValid] = true; 918 919 if (cpu->checker) { 920 if (reqToVerify != NULL) { 921 delete reqToVerify; 922 } 923 reqToVerify = new Request(*req); 924 } 925 fault = cpu->read(req, sreqLow, sreqHigh, lqIdx); 926 } else { 927 // Commit will have to clean up whatever happened. Set this 928 // instruction as executed. 929 this->setExecuted(); 930 } 931 } 932 933 if (traceData) 934 traceData->setMem(addr, size, flags); 935 936 return fault; 937} 938 939template<class Impl> 940Fault 941BaseDynInst<Impl>::writeMem(uint8_t *data, unsigned size, Addr addr, 942 Request::Flags flags, uint64_t *res) 943{ 944 if (traceData) 945 traceData->setMem(addr, size, flags); 946 947 instFlags[ReqMade] = true; 948 Request *req = NULL; 949 Request *sreqLow = NULL; 950 Request *sreqHigh = NULL; 951 952 if (instFlags[ReqMade] && translationStarted()) { 953 req = savedReq; 954 sreqLow = savedSreqLow; 955 sreqHigh = savedSreqHigh; 956 } else { 957 req = new Request(asid, addr, size, flags, masterId(), this->pc.instAddr(), 958 thread->contextId()); 959 960 req->taskId(cpu->taskId()); 961 962 // Only split the request if the ISA supports unaligned accesses. 963 if (TheISA::HasUnalignedMemAcc) { 964 splitRequest(req, sreqLow, sreqHigh); 965 } 966 initiateTranslation(req, sreqLow, sreqHigh, res, BaseTLB::Write); 967 } 968 969 if (fault == NoFault && translationCompleted()) { 970 effAddr = req->getVaddr(); 971 effSize = size; 972 instFlags[EffAddrValid] = true; 973 974 if (cpu->checker) { 975 if (reqToVerify != NULL) { 976 delete reqToVerify; 977 } 978 reqToVerify = new Request(*req); 979 } 980 fault = cpu->write(req, sreqLow, sreqHigh, data, sqIdx); 981 } 982 983 return fault; 984} 985 986template<class Impl> 987inline void 988BaseDynInst<Impl>::splitRequest(RequestPtr req, RequestPtr &sreqLow, 989 RequestPtr &sreqHigh) 990{ 991 // Check to see if the request crosses the next level block boundary. 992 unsigned block_size = cpu->cacheLineSize(); 993 Addr addr = req->getVaddr(); 994 Addr split_addr = roundDown(addr + req->getSize() - 1, block_size); 995 assert(split_addr <= addr || split_addr - addr < block_size); 996 997 // Spans two blocks. 998 if (split_addr > addr) { 999 req->splitOnVaddr(split_addr, sreqLow, sreqHigh); 1000 } 1001} 1002 1003template<class Impl> 1004inline void 1005BaseDynInst<Impl>::initiateTranslation(RequestPtr req, RequestPtr sreqLow, 1006 RequestPtr sreqHigh, uint64_t *res, 1007 BaseTLB::Mode mode) 1008{ 1009 translationStarted(true); 1010 1011 if (!TheISA::HasUnalignedMemAcc || sreqLow == NULL) { 1012 WholeTranslationState *state = 1013 new WholeTranslationState(req, NULL, res, mode); 1014 1015 // One translation if the request isn't split. 1016 DataTranslation<BaseDynInstPtr> *trans = 1017 new DataTranslation<BaseDynInstPtr>(this, state); 1018 1019 cpu->dtb->translateTiming(req, thread->getTC(), trans, mode); 1020 1021 if (!translationCompleted()) { 1022 // The translation isn't yet complete, so we can't possibly have a 1023 // fault. Overwrite any existing fault we might have from a previous 1024 // execution of this instruction (e.g. an uncachable load that 1025 // couldn't execute because it wasn't at the head of the ROB). 1026 fault = NoFault; 1027 1028 // Save memory requests. 1029 savedReq = state->mainReq; 1030 savedSreqLow = state->sreqLow; 1031 savedSreqHigh = state->sreqHigh; 1032 } 1033 } else { 1034 WholeTranslationState *state = 1035 new WholeTranslationState(req, sreqLow, sreqHigh, NULL, res, mode); 1036 1037 // Two translations when the request is split. 1038 DataTranslation<BaseDynInstPtr> *stransLow = 1039 new DataTranslation<BaseDynInstPtr>(this, state, 0); 1040 DataTranslation<BaseDynInstPtr> *stransHigh = 1041 new DataTranslation<BaseDynInstPtr>(this, state, 1); 1042 1043 cpu->dtb->translateTiming(sreqLow, thread->getTC(), stransLow, mode); 1044 cpu->dtb->translateTiming(sreqHigh, thread->getTC(), stransHigh, mode); 1045 1046 if (!translationCompleted()) { 1047 // The translation isn't yet complete, so we can't possibly have a 1048 // fault. Overwrite any existing fault we might have from a previous 1049 // execution of this instruction (e.g. an uncachable load that 1050 // couldn't execute because it wasn't at the head of the ROB). 1051 fault = NoFault; 1052 1053 // Save memory requests. 1054 savedReq = state->mainReq; 1055 savedSreqLow = state->sreqLow; 1056 savedSreqHigh = state->sreqHigh; 1057 } 1058 } 1059} 1060 1061template<class Impl> 1062inline void 1063BaseDynInst<Impl>::finishTranslation(WholeTranslationState *state) 1064{ 1065 fault = state->getFault(); 1066 1067 instFlags[IsStrictlyOrdered] = state->isStrictlyOrdered(); 1068 1069 if (fault == NoFault) { 1070 // save Paddr for a single req 1071 physEffAddrLow = state->getPaddr(); 1072 1073 // case for the request that has been split 1074 if (state->isSplit) { 1075 physEffAddrLow = state->sreqLow->getPaddr(); 1076 physEffAddrHigh = state->sreqHigh->getPaddr(); 1077 } 1078 1079 memReqFlags = state->getFlags(); 1080 1081 if (state->mainReq->isCondSwap()) { 1082 assert(state->res); 1083 state->mainReq->setExtraData(*state->res); 1084 } 1085 1086 } else { 1087 state->deleteReqs(); 1088 } 1089 delete state; 1090 1091 translationCompleted(true); 1092} 1093 1094#endif // __CPU_BASE_DYN_INST_HH__ 1095