cpu.cc revision 8779
1/* 2 * Copyright (c) 2004-2006 The Regents of The University of Michigan 3 * Copyright (c) 2011 Regents of the University of California 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are 8 * met: redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer; 10 * redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution; 13 * neither the name of the copyright holders nor the names of its 14 * contributors may be used to endorse or promote products derived from 15 * this software without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * Authors: Kevin Lim 30 * Korey Sewell 31 * Rick Strong 32 */ 33 34#include "arch/kernel_stats.hh" 35#include "config/full_system.hh" 36#include "config/the_isa.hh" 37#include "config/use_checker.hh" 38#include "cpu/o3/cpu.hh" 39#include "cpu/o3/isa_specific.hh" 40#include "cpu/o3/thread_context.hh" 41#include "cpu/activity.hh" 42#include "cpu/quiesce_event.hh" 43#include "cpu/simple_thread.hh" 44#include "cpu/thread_context.hh" 45#include "debug/Activity.hh" 46#include "debug/O3CPU.hh" 47#include "debug/Quiesce.hh" 48#include "enums/MemoryMode.hh" 49#include "sim/core.hh" 50#include "sim/process.hh" 51#include "sim/stat_control.hh" 52#include "sim/system.hh" 53 54#if USE_CHECKER 55#include "cpu/checker/cpu.hh" 56#endif 57 58#if THE_ISA == ALPHA_ISA 59#include "arch/alpha/osfpal.hh" 60#include "debug/Activity.hh" 61#endif 62 63class BaseCPUParams; 64 65using namespace TheISA; 66using namespace std; 67 68BaseO3CPU::BaseO3CPU(BaseCPUParams *params) 69 : BaseCPU(params) 70{ 71} 72 73void 74BaseO3CPU::regStats() 75{ 76 BaseCPU::regStats(); 77} 78 79template <class Impl> 80FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c) 81 : Event(CPU_Tick_Pri), cpu(c) 82{ 83} 84 85template <class Impl> 86void 87FullO3CPU<Impl>::TickEvent::process() 88{ 89 cpu->tick(); 90} 91 92template <class Impl> 93const char * 94FullO3CPU<Impl>::TickEvent::description() const 95{ 96 return "FullO3CPU tick"; 97} 98 99template <class Impl> 100FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent() 101 : Event(CPU_Switch_Pri) 102{ 103} 104 105template <class Impl> 106void 107FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num, 108 FullO3CPU<Impl> *thread_cpu) 109{ 110 tid = thread_num; 111 cpu = thread_cpu; 112} 113 114template <class Impl> 115void 116FullO3CPU<Impl>::ActivateThreadEvent::process() 117{ 118 cpu->activateThread(tid); 119} 120 121template <class Impl> 122const char * 123FullO3CPU<Impl>::ActivateThreadEvent::description() const 124{ 125 return "FullO3CPU \"Activate Thread\""; 126} 127 128template <class Impl> 129FullO3CPU<Impl>::DeallocateContextEvent::DeallocateContextEvent() 130 : Event(CPU_Tick_Pri), tid(0), remove(false), cpu(NULL) 131{ 132} 133 134template <class Impl> 135void 136FullO3CPU<Impl>::DeallocateContextEvent::init(int thread_num, 137 FullO3CPU<Impl> *thread_cpu) 138{ 139 tid = thread_num; 140 cpu = thread_cpu; 141 remove = false; 142} 143 144template <class Impl> 145void 146FullO3CPU<Impl>::DeallocateContextEvent::process() 147{ 148 cpu->deactivateThread(tid); 149 if (remove) 150 cpu->removeThread(tid); 151} 152 153template <class Impl> 154const char * 155FullO3CPU<Impl>::DeallocateContextEvent::description() const 156{ 157 return "FullO3CPU \"Deallocate Context\""; 158} 159 160template <class Impl> 161FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params) 162 : BaseO3CPU(params), 163 itb(params->itb), 164 dtb(params->dtb), 165 tickEvent(this), 166#ifndef NDEBUG 167 instcount(0), 168#endif 169 removeInstsThisCycle(false), 170 fetch(this, params), 171 decode(this, params), 172 rename(this, params), 173 iew(this, params), 174 commit(this, params), 175 176 regFile(this, params->numPhysIntRegs, 177 params->numPhysFloatRegs), 178 179 freeList(params->numThreads, 180 TheISA::NumIntRegs, params->numPhysIntRegs, 181 TheISA::NumFloatRegs, params->numPhysFloatRegs), 182 183 rob(this, 184 params->numROBEntries, params->squashWidth, 185 params->smtROBPolicy, params->smtROBThreshold, 186 params->numThreads), 187 188 scoreboard(params->numThreads, 189 TheISA::NumIntRegs, params->numPhysIntRegs, 190 TheISA::NumFloatRegs, params->numPhysFloatRegs, 191 TheISA::NumMiscRegs * numThreads, 192 TheISA::ZeroReg), 193 194 timeBuffer(params->backComSize, params->forwardComSize), 195 fetchQueue(params->backComSize, params->forwardComSize), 196 decodeQueue(params->backComSize, params->forwardComSize), 197 renameQueue(params->backComSize, params->forwardComSize), 198 iewQueue(params->backComSize, params->forwardComSize), 199 activityRec(name(), NumStages, 200 params->backComSize + params->forwardComSize, 201 params->activity), 202 203 globalSeqNum(1), 204 system(params->system), 205 drainCount(0), 206 deferRegistration(params->defer_registration) 207{ 208 if (!deferRegistration) { 209 _status = Running; 210 } else { 211 _status = Idle; 212 } 213 214#if USE_CHECKER 215 if (params->checker) { 216 BaseCPU *temp_checker = params->checker; 217 checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker); 218#if FULL_SYSTEM 219 checker->setSystem(params->system); 220#endif 221 } else { 222 checker = NULL; 223 } 224#endif // USE_CHECKER 225 226#if !FULL_SYSTEM 227 thread.resize(numThreads); 228 tids.resize(numThreads); 229#endif 230 231 // The stages also need their CPU pointer setup. However this 232 // must be done at the upper level CPU because they have pointers 233 // to the upper level CPU, and not this FullO3CPU. 234 235 // Set up Pointers to the activeThreads list for each stage 236 fetch.setActiveThreads(&activeThreads); 237 decode.setActiveThreads(&activeThreads); 238 rename.setActiveThreads(&activeThreads); 239 iew.setActiveThreads(&activeThreads); 240 commit.setActiveThreads(&activeThreads); 241 242 // Give each of the stages the time buffer they will use. 243 fetch.setTimeBuffer(&timeBuffer); 244 decode.setTimeBuffer(&timeBuffer); 245 rename.setTimeBuffer(&timeBuffer); 246 iew.setTimeBuffer(&timeBuffer); 247 commit.setTimeBuffer(&timeBuffer); 248 249 // Also setup each of the stages' queues. 250 fetch.setFetchQueue(&fetchQueue); 251 decode.setFetchQueue(&fetchQueue); 252 commit.setFetchQueue(&fetchQueue); 253 decode.setDecodeQueue(&decodeQueue); 254 rename.setDecodeQueue(&decodeQueue); 255 rename.setRenameQueue(&renameQueue); 256 iew.setRenameQueue(&renameQueue); 257 iew.setIEWQueue(&iewQueue); 258 commit.setIEWQueue(&iewQueue); 259 commit.setRenameQueue(&renameQueue); 260 261 commit.setIEWStage(&iew); 262 rename.setIEWStage(&iew); 263 rename.setCommitStage(&commit); 264 265#if !FULL_SYSTEM 266 ThreadID active_threads = params->workload.size(); 267 268 if (active_threads > Impl::MaxThreads) { 269 panic("Workload Size too large. Increase the 'MaxThreads'" 270 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) or " 271 "edit your workload size."); 272 } 273#else 274 ThreadID active_threads = 1; 275#endif 276 277 //Make Sure That this a Valid Architeture 278 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs); 279 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs); 280 281 rename.setScoreboard(&scoreboard); 282 iew.setScoreboard(&scoreboard); 283 284 // Setup the rename map for whichever stages need it. 285 PhysRegIndex lreg_idx = 0; 286 PhysRegIndex freg_idx = params->numPhysIntRegs; //Index to 1 after int regs 287 288 for (ThreadID tid = 0; tid < numThreads; tid++) { 289 bool bindRegs = (tid <= active_threads - 1); 290 291 commitRenameMap[tid].init(TheISA::NumIntRegs, 292 params->numPhysIntRegs, 293 lreg_idx, //Index for Logical. Regs 294 295 TheISA::NumFloatRegs, 296 params->numPhysFloatRegs, 297 freg_idx, //Index for Float Regs 298 299 TheISA::NumMiscRegs, 300 301 TheISA::ZeroReg, 302 TheISA::ZeroReg, 303 304 tid, 305 false); 306 307 renameMap[tid].init(TheISA::NumIntRegs, 308 params->numPhysIntRegs, 309 lreg_idx, //Index for Logical. Regs 310 311 TheISA::NumFloatRegs, 312 params->numPhysFloatRegs, 313 freg_idx, //Index for Float Regs 314 315 TheISA::NumMiscRegs, 316 317 TheISA::ZeroReg, 318 TheISA::ZeroReg, 319 320 tid, 321 bindRegs); 322 323 activateThreadEvent[tid].init(tid, this); 324 deallocateContextEvent[tid].init(tid, this); 325 } 326 327 rename.setRenameMap(renameMap); 328 commit.setRenameMap(commitRenameMap); 329 330 // Give renameMap & rename stage access to the freeList; 331 for (ThreadID tid = 0; tid < numThreads; tid++) 332 renameMap[tid].setFreeList(&freeList); 333 rename.setFreeList(&freeList); 334 335 // Setup the ROB for whichever stages need it. 336 commit.setROB(&rob); 337 338 lastRunningCycle = curTick(); 339 340 lastActivatedCycle = -1; 341#if 0 342 // Give renameMap & rename stage access to the freeList; 343 for (ThreadID tid = 0; tid < numThreads; tid++) 344 globalSeqNum[tid] = 1; 345#endif 346 347 contextSwitch = false; 348 DPRINTF(O3CPU, "Creating O3CPU object.\n"); 349 350 // Setup any thread state. 351 this->thread.resize(this->numThreads); 352 353 for (ThreadID tid = 0; tid < this->numThreads; ++tid) { 354#if FULL_SYSTEM 355 // SMT is not supported in FS mode yet. 356 assert(this->numThreads == 1); 357 this->thread[tid] = new Thread(this, 0, NULL); 358#else 359 if (tid < params->workload.size()) { 360 DPRINTF(O3CPU, "Workload[%i] process is %#x", 361 tid, this->thread[tid]); 362 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 363 (typename Impl::O3CPU *)(this), 364 tid, params->workload[tid]); 365 366 //usedTids[tid] = true; 367 //threadMap[tid] = tid; 368 } else { 369 //Allocate Empty thread so M5 can use later 370 //when scheduling threads to CPU 371 Process* dummy_proc = NULL; 372 373 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 374 (typename Impl::O3CPU *)(this), 375 tid, dummy_proc); 376 //usedTids[tid] = false; 377 } 378#endif // !FULL_SYSTEM 379 380 ThreadContext *tc; 381 382 // Setup the TC that will serve as the interface to the threads/CPU. 383 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>; 384 385 tc = o3_tc; 386 387 // If we're using a checker, then the TC should be the 388 // CheckerThreadContext. 389#if USE_CHECKER 390 if (params->checker) { 391 tc = new CheckerThreadContext<O3ThreadContext<Impl> >( 392 o3_tc, this->checker); 393 } 394#endif 395 396 o3_tc->cpu = (typename Impl::O3CPU *)(this); 397 assert(o3_tc->cpu); 398 o3_tc->thread = this->thread[tid]; 399 400#if FULL_SYSTEM 401 // Setup quiesce event. 402 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc); 403#endif 404 // Give the thread the TC. 405 this->thread[tid]->tc = tc; 406 407 // Add the TC to the CPU's list of TC's. 408 this->threadContexts.push_back(tc); 409 } 410 411 for (ThreadID tid = 0; tid < this->numThreads; tid++) 412 this->thread[tid]->setFuncExeInst(0); 413 414 lockAddr = 0; 415 lockFlag = false; 416} 417 418template <class Impl> 419FullO3CPU<Impl>::~FullO3CPU() 420{ 421} 422 423template <class Impl> 424void 425FullO3CPU<Impl>::regStats() 426{ 427 BaseO3CPU::regStats(); 428 429 // Register any of the O3CPU's stats here. 430 timesIdled 431 .name(name() + ".timesIdled") 432 .desc("Number of times that the entire CPU went into an idle state and" 433 " unscheduled itself") 434 .prereq(timesIdled); 435 436 idleCycles 437 .name(name() + ".idleCycles") 438 .desc("Total number of cycles that the CPU has spent unscheduled due " 439 "to idling") 440 .prereq(idleCycles); 441 442 // Number of Instructions simulated 443 // -------------------------------- 444 // Should probably be in Base CPU but need templated 445 // MaxThreads so put in here instead 446 committedInsts 447 .init(numThreads) 448 .name(name() + ".committedInsts") 449 .desc("Number of Instructions Simulated"); 450 451 totalCommittedInsts 452 .name(name() + ".committedInsts_total") 453 .desc("Number of Instructions Simulated"); 454 455 cpi 456 .name(name() + ".cpi") 457 .desc("CPI: Cycles Per Instruction") 458 .precision(6); 459 cpi = numCycles / committedInsts; 460 461 totalCpi 462 .name(name() + ".cpi_total") 463 .desc("CPI: Total CPI of All Threads") 464 .precision(6); 465 totalCpi = numCycles / totalCommittedInsts; 466 467 ipc 468 .name(name() + ".ipc") 469 .desc("IPC: Instructions Per Cycle") 470 .precision(6); 471 ipc = committedInsts / numCycles; 472 473 totalIpc 474 .name(name() + ".ipc_total") 475 .desc("IPC: Total IPC of All Threads") 476 .precision(6); 477 totalIpc = totalCommittedInsts / numCycles; 478 479 this->fetch.regStats(); 480 this->decode.regStats(); 481 this->rename.regStats(); 482 this->iew.regStats(); 483 this->commit.regStats(); 484 this->rob.regStats(); 485 486 intRegfileReads 487 .name(name() + ".int_regfile_reads") 488 .desc("number of integer regfile reads") 489 .prereq(intRegfileReads); 490 491 intRegfileWrites 492 .name(name() + ".int_regfile_writes") 493 .desc("number of integer regfile writes") 494 .prereq(intRegfileWrites); 495 496 fpRegfileReads 497 .name(name() + ".fp_regfile_reads") 498 .desc("number of floating regfile reads") 499 .prereq(fpRegfileReads); 500 501 fpRegfileWrites 502 .name(name() + ".fp_regfile_writes") 503 .desc("number of floating regfile writes") 504 .prereq(fpRegfileWrites); 505 506 miscRegfileReads 507 .name(name() + ".misc_regfile_reads") 508 .desc("number of misc regfile reads") 509 .prereq(miscRegfileReads); 510 511 miscRegfileWrites 512 .name(name() + ".misc_regfile_writes") 513 .desc("number of misc regfile writes") 514 .prereq(miscRegfileWrites); 515} 516 517template <class Impl> 518Port * 519FullO3CPU<Impl>::getPort(const std::string &if_name, int idx) 520{ 521 if (if_name == "dcache_port") 522 return iew.getDcachePort(); 523 else if (if_name == "icache_port") 524 return fetch.getIcachePort(); 525 else 526 panic("No Such Port\n"); 527} 528 529template <class Impl> 530void 531FullO3CPU<Impl>::tick() 532{ 533 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n"); 534 535 ++numCycles; 536 537// activity = false; 538 539 //Tick each of the stages 540 fetch.tick(); 541 542 decode.tick(); 543 544 rename.tick(); 545 546 iew.tick(); 547 548 commit.tick(); 549 550#if !FULL_SYSTEM 551 doContextSwitch(); 552#endif 553 554 // Now advance the time buffers 555 timeBuffer.advance(); 556 557 fetchQueue.advance(); 558 decodeQueue.advance(); 559 renameQueue.advance(); 560 iewQueue.advance(); 561 562 activityRec.advance(); 563 564 if (removeInstsThisCycle) { 565 cleanUpRemovedInsts(); 566 } 567 568 if (!tickEvent.scheduled()) { 569 if (_status == SwitchedOut || 570 getState() == SimObject::Drained) { 571 DPRINTF(O3CPU, "Switched out!\n"); 572 // increment stat 573 lastRunningCycle = curTick(); 574 } else if (!activityRec.active() || _status == Idle) { 575 DPRINTF(O3CPU, "Idle!\n"); 576 lastRunningCycle = curTick(); 577 timesIdled++; 578 } else { 579 schedule(tickEvent, nextCycle(curTick() + ticks(1))); 580 DPRINTF(O3CPU, "Scheduling next tick!\n"); 581 } 582 } 583 584#if !FULL_SYSTEM 585 updateThreadPriority(); 586#endif 587} 588 589template <class Impl> 590void 591FullO3CPU<Impl>::init() 592{ 593 BaseCPU::init(); 594 595 // Set inSyscall so that the CPU doesn't squash when initially 596 // setting up registers. 597 for (ThreadID tid = 0; tid < numThreads; ++tid) 598 thread[tid]->inSyscall = true; 599 600#if FULL_SYSTEM 601 for (ThreadID tid = 0; tid < numThreads; tid++) { 602 ThreadContext *src_tc = threadContexts[tid]; 603 TheISA::initCPU(src_tc, src_tc->contextId()); 604 } 605#endif 606 607 // Clear inSyscall. 608 for (int tid = 0; tid < numThreads; ++tid) 609 thread[tid]->inSyscall = false; 610 611 // Initialize stages. 612 fetch.initStage(); 613 iew.initStage(); 614 rename.initStage(); 615 commit.initStage(); 616 617 commit.setThreads(thread); 618} 619 620template <class Impl> 621void 622FullO3CPU<Impl>::activateThread(ThreadID tid) 623{ 624 list<ThreadID>::iterator isActive = 625 std::find(activeThreads.begin(), activeThreads.end(), tid); 626 627 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid); 628 629 if (isActive == activeThreads.end()) { 630 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n", 631 tid); 632 633 activeThreads.push_back(tid); 634 } 635} 636 637template <class Impl> 638void 639FullO3CPU<Impl>::deactivateThread(ThreadID tid) 640{ 641 //Remove From Active List, if Active 642 list<ThreadID>::iterator thread_it = 643 std::find(activeThreads.begin(), activeThreads.end(), tid); 644 645 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid); 646 647 if (thread_it != activeThreads.end()) { 648 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n", 649 tid); 650 activeThreads.erase(thread_it); 651 } 652} 653 654template <class Impl> 655Counter 656FullO3CPU<Impl>::totalInstructions() const 657{ 658 Counter total(0); 659 660 ThreadID size = thread.size(); 661 for (ThreadID i = 0; i < size; i++) 662 total += thread[i]->numInst; 663 664 return total; 665} 666 667template <class Impl> 668void 669FullO3CPU<Impl>::activateContext(ThreadID tid, int delay) 670{ 671 // Needs to set each stage to running as well. 672 if (delay){ 673 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate " 674 "on cycle %d\n", tid, curTick() + ticks(delay)); 675 scheduleActivateThreadEvent(tid, delay); 676 } else { 677 activateThread(tid); 678 } 679 680 if (lastActivatedCycle < curTick()) { 681 scheduleTickEvent(delay); 682 683 // Be sure to signal that there's some activity so the CPU doesn't 684 // deschedule itself. 685 activityRec.activity(); 686 fetch.wakeFromQuiesce(); 687 688 lastActivatedCycle = curTick(); 689 690 _status = Running; 691 } 692} 693 694template <class Impl> 695bool 696FullO3CPU<Impl>::deallocateContext(ThreadID tid, bool remove, int delay) 697{ 698 // Schedule removal of thread data from CPU 699 if (delay){ 700 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate " 701 "on cycle %d\n", tid, curTick() + ticks(delay)); 702 scheduleDeallocateContextEvent(tid, remove, delay); 703 return false; 704 } else { 705 deactivateThread(tid); 706 if (remove) 707 removeThread(tid); 708 return true; 709 } 710} 711 712template <class Impl> 713void 714FullO3CPU<Impl>::suspendContext(ThreadID tid) 715{ 716 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid); 717 bool deallocated = deallocateContext(tid, false, 1); 718 // If this was the last thread then unschedule the tick event. 719 if ((activeThreads.size() == 1 && !deallocated) || 720 activeThreads.size() == 0) 721 unscheduleTickEvent(); 722 _status = Idle; 723} 724 725template <class Impl> 726void 727FullO3CPU<Impl>::haltContext(ThreadID tid) 728{ 729 //For now, this is the same as deallocate 730 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid); 731 deallocateContext(tid, true, 1); 732} 733 734template <class Impl> 735void 736FullO3CPU<Impl>::insertThread(ThreadID tid) 737{ 738 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU"); 739 // Will change now that the PC and thread state is internal to the CPU 740 // and not in the ThreadContext. 741#if FULL_SYSTEM 742 ThreadContext *src_tc = system->threadContexts[tid]; 743#else 744 ThreadContext *src_tc = tcBase(tid); 745#endif 746 747 //Bind Int Regs to Rename Map 748 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 749 PhysRegIndex phys_reg = freeList.getIntReg(); 750 751 renameMap[tid].setEntry(ireg,phys_reg); 752 scoreboard.setReg(phys_reg); 753 } 754 755 //Bind Float Regs to Rename Map 756 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) { 757 PhysRegIndex phys_reg = freeList.getFloatReg(); 758 759 renameMap[tid].setEntry(freg,phys_reg); 760 scoreboard.setReg(phys_reg); 761 } 762 763 //Copy Thread Data Into RegFile 764 //this->copyFromTC(tid); 765 766 //Set PC/NPC/NNPC 767 pcState(src_tc->pcState(), tid); 768 769 src_tc->setStatus(ThreadContext::Active); 770 771 activateContext(tid,1); 772 773 //Reset ROB/IQ/LSQ Entries 774 commit.rob->resetEntries(); 775 iew.resetEntries(); 776} 777 778template <class Impl> 779void 780FullO3CPU<Impl>::removeThread(ThreadID tid) 781{ 782 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid); 783 784 // Copy Thread Data From RegFile 785 // If thread is suspended, it might be re-allocated 786 // this->copyToTC(tid); 787 788 789 // @todo: 2-27-2008: Fix how we free up rename mappings 790 // here to alleviate the case for double-freeing registers 791 // in SMT workloads. 792 793 // Unbind Int Regs from Rename Map 794 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 795 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg); 796 797 scoreboard.unsetReg(phys_reg); 798 freeList.addReg(phys_reg); 799 } 800 801 // Unbind Float Regs from Rename Map 802 for (int freg = TheISA::NumIntRegs; freg < TheISA::NumFloatRegs; freg++) { 803 PhysRegIndex phys_reg = renameMap[tid].lookup(freg); 804 805 scoreboard.unsetReg(phys_reg); 806 freeList.addReg(phys_reg); 807 } 808 809 // Squash Throughout Pipeline 810 DynInstPtr inst = commit.rob->readHeadInst(tid); 811 InstSeqNum squash_seq_num = inst->seqNum; 812 fetch.squash(0, squash_seq_num, inst, tid); 813 decode.squash(tid); 814 rename.squash(squash_seq_num, tid); 815 iew.squash(tid); 816 iew.ldstQueue.squash(squash_seq_num, tid); 817 commit.rob->squash(squash_seq_num, tid); 818 819 820 assert(iew.instQueue.getCount(tid) == 0); 821 assert(iew.ldstQueue.getCount(tid) == 0); 822 823 // Reset ROB/IQ/LSQ Entries 824 825 // Commented out for now. This should be possible to do by 826 // telling all the pipeline stages to drain first, and then 827 // checking until the drain completes. Once the pipeline is 828 // drained, call resetEntries(). - 10-09-06 ktlim 829/* 830 if (activeThreads.size() >= 1) { 831 commit.rob->resetEntries(); 832 iew.resetEntries(); 833 } 834*/ 835} 836 837 838template <class Impl> 839void 840FullO3CPU<Impl>::activateWhenReady(ThreadID tid) 841{ 842 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming" 843 "(e.g. PhysRegs/ROB/IQ/LSQ) \n", 844 tid); 845 846 bool ready = true; 847 848 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) { 849 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 850 "Phys. Int. Regs.\n", 851 tid); 852 ready = false; 853 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) { 854 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 855 "Phys. Float. Regs.\n", 856 tid); 857 ready = false; 858 } else if (commit.rob->numFreeEntries() >= 859 commit.rob->entryAmount(activeThreads.size() + 1)) { 860 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 861 "ROB entries.\n", 862 tid); 863 ready = false; 864 } else if (iew.instQueue.numFreeEntries() >= 865 iew.instQueue.entryAmount(activeThreads.size() + 1)) { 866 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 867 "IQ entries.\n", 868 tid); 869 ready = false; 870 } else if (iew.ldstQueue.numFreeEntries() >= 871 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) { 872 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 873 "LSQ entries.\n", 874 tid); 875 ready = false; 876 } 877 878 if (ready) { 879 insertThread(tid); 880 881 contextSwitch = false; 882 883 cpuWaitList.remove(tid); 884 } else { 885 suspendContext(tid); 886 887 //blocks fetch 888 contextSwitch = true; 889 890 //@todo: dont always add to waitlist 891 //do waitlist 892 cpuWaitList.push_back(tid); 893 } 894} 895 896template <class Impl> 897Fault 898FullO3CPU<Impl>::hwrei(ThreadID tid) 899{ 900#if THE_ISA == ALPHA_ISA 901 // Need to clear the lock flag upon returning from an interrupt. 902 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid); 903 904 this->thread[tid]->kernelStats->hwrei(); 905 906 // FIXME: XXX check for interrupts? XXX 907#endif 908 return NoFault; 909} 910 911template <class Impl> 912bool 913FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid) 914{ 915#if THE_ISA == ALPHA_ISA 916 if (this->thread[tid]->kernelStats) 917 this->thread[tid]->kernelStats->callpal(palFunc, 918 this->threadContexts[tid]); 919 920 switch (palFunc) { 921 case PAL::halt: 922 halt(); 923 if (--System::numSystemsRunning == 0) 924 exitSimLoop("all cpus halted"); 925 break; 926 927 case PAL::bpt: 928 case PAL::bugchk: 929 if (this->system->breakpoint()) 930 return false; 931 break; 932 } 933#endif 934 return true; 935} 936 937template <class Impl> 938Fault 939FullO3CPU<Impl>::getInterrupts() 940{ 941 // Check if there are any outstanding interrupts 942 return this->interrupts->getInterrupt(this->threadContexts[0]); 943} 944 945template <class Impl> 946void 947FullO3CPU<Impl>::processInterrupts(Fault interrupt) 948{ 949 // Check for interrupts here. For now can copy the code that 950 // exists within isa_fullsys_traits.hh. Also assume that thread 0 951 // is the one that handles the interrupts. 952 // @todo: Possibly consolidate the interrupt checking code. 953 // @todo: Allow other threads to handle interrupts. 954 955 assert(interrupt != NoFault); 956 this->interrupts->updateIntrInfo(this->threadContexts[0]); 957 958 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name()); 959 this->trap(interrupt, 0, NULL); 960} 961 962template <class Impl> 963void 964FullO3CPU<Impl>::updateMemPorts() 965{ 966 // Update all ThreadContext's memory ports (Functional/Virtual 967 // Ports) 968 ThreadID size = thread.size(); 969 for (ThreadID i = 0; i < size; ++i) 970 thread[i]->connectMemPorts(thread[i]->getTC()); 971} 972 973template <class Impl> 974void 975FullO3CPU<Impl>::trap(Fault fault, ThreadID tid, StaticInstPtr inst) 976{ 977 // Pass the thread's TC into the invoke method. 978 fault->invoke(this->threadContexts[tid], inst); 979} 980 981template <class Impl> 982void 983FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid) 984{ 985 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid); 986 987 DPRINTF(Activity,"Activity: syscall() called.\n"); 988 989 // Temporarily increase this by one to account for the syscall 990 // instruction. 991 ++(this->thread[tid]->funcExeInst); 992 993 // Execute the actual syscall. 994 this->thread[tid]->syscall(callnum); 995 996 // Decrease funcExeInst by one as the normal commit will handle 997 // incrementing it. 998 --(this->thread[tid]->funcExeInst); 999} 1000 1001template <class Impl> 1002void 1003FullO3CPU<Impl>::serialize(std::ostream &os) 1004{ 1005 SimObject::State so_state = SimObject::getState(); 1006 SERIALIZE_ENUM(so_state); 1007 BaseCPU::serialize(os); 1008 nameOut(os, csprintf("%s.tickEvent", name())); 1009 tickEvent.serialize(os); 1010 1011 // Use SimpleThread's ability to checkpoint to make it easier to 1012 // write out the registers. Also make this static so it doesn't 1013 // get instantiated multiple times (causes a panic in statistics). 1014 static SimpleThread temp; 1015 1016 ThreadID size = thread.size(); 1017 for (ThreadID i = 0; i < size; i++) { 1018 nameOut(os, csprintf("%s.xc.%i", name(), i)); 1019 temp.copyTC(thread[i]->getTC()); 1020 temp.serialize(os); 1021 } 1022} 1023 1024template <class Impl> 1025void 1026FullO3CPU<Impl>::unserialize(Checkpoint *cp, const std::string §ion) 1027{ 1028 SimObject::State so_state; 1029 UNSERIALIZE_ENUM(so_state); 1030 BaseCPU::unserialize(cp, section); 1031 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section)); 1032 1033 // Use SimpleThread's ability to checkpoint to make it easier to 1034 // read in the registers. Also make this static so it doesn't 1035 // get instantiated multiple times (causes a panic in statistics). 1036 static SimpleThread temp; 1037 1038 ThreadID size = thread.size(); 1039 for (ThreadID i = 0; i < size; i++) { 1040 temp.copyTC(thread[i]->getTC()); 1041 temp.unserialize(cp, csprintf("%s.xc.%i", section, i)); 1042 thread[i]->getTC()->copyArchRegs(temp.getTC()); 1043 } 1044} 1045 1046template <class Impl> 1047unsigned int 1048FullO3CPU<Impl>::drain(Event *drain_event) 1049{ 1050 DPRINTF(O3CPU, "Switching out\n"); 1051 1052 // If the CPU isn't doing anything, then return immediately. 1053 if (_status == Idle || _status == SwitchedOut) { 1054 return 0; 1055 } 1056 1057 drainCount = 0; 1058 fetch.drain(); 1059 decode.drain(); 1060 rename.drain(); 1061 iew.drain(); 1062 commit.drain(); 1063 1064 // Wake the CPU and record activity so everything can drain out if 1065 // the CPU was not able to immediately drain. 1066 if (getState() != SimObject::Drained) { 1067 // A bit of a hack...set the drainEvent after all the drain() 1068 // calls have been made, that way if all of the stages drain 1069 // immediately, the signalDrained() function knows not to call 1070 // process on the drain event. 1071 drainEvent = drain_event; 1072 1073 wakeCPU(); 1074 activityRec.activity(); 1075 1076 return 1; 1077 } else { 1078 return 0; 1079 } 1080} 1081 1082template <class Impl> 1083void 1084FullO3CPU<Impl>::resume() 1085{ 1086 fetch.resume(); 1087 decode.resume(); 1088 rename.resume(); 1089 iew.resume(); 1090 commit.resume(); 1091 1092 changeState(SimObject::Running); 1093 1094 if (_status == SwitchedOut || _status == Idle) 1095 return; 1096 1097 assert(system->getMemoryMode() == Enums::timing); 1098 1099 if (!tickEvent.scheduled()) 1100 schedule(tickEvent, nextCycle()); 1101 _status = Running; 1102} 1103 1104template <class Impl> 1105void 1106FullO3CPU<Impl>::signalDrained() 1107{ 1108 if (++drainCount == NumStages) { 1109 if (tickEvent.scheduled()) 1110 tickEvent.squash(); 1111 1112 changeState(SimObject::Drained); 1113 1114 BaseCPU::switchOut(); 1115 1116 if (drainEvent) { 1117 drainEvent->process(); 1118 drainEvent = NULL; 1119 } 1120 } 1121 assert(drainCount <= 5); 1122} 1123 1124template <class Impl> 1125void 1126FullO3CPU<Impl>::switchOut() 1127{ 1128 fetch.switchOut(); 1129 rename.switchOut(); 1130 iew.switchOut(); 1131 commit.switchOut(); 1132 instList.clear(); 1133 while (!removeList.empty()) { 1134 removeList.pop(); 1135 } 1136 1137 _status = SwitchedOut; 1138#if USE_CHECKER 1139 if (checker) 1140 checker->switchOut(); 1141#endif 1142 if (tickEvent.scheduled()) 1143 tickEvent.squash(); 1144} 1145 1146template <class Impl> 1147void 1148FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU) 1149{ 1150 // Flush out any old data from the time buffers. 1151 for (int i = 0; i < timeBuffer.getSize(); ++i) { 1152 timeBuffer.advance(); 1153 fetchQueue.advance(); 1154 decodeQueue.advance(); 1155 renameQueue.advance(); 1156 iewQueue.advance(); 1157 } 1158 1159 activityRec.reset(); 1160 1161 BaseCPU::takeOverFrom(oldCPU, fetch.getIcachePort(), iew.getDcachePort()); 1162 1163 fetch.takeOverFrom(); 1164 decode.takeOverFrom(); 1165 rename.takeOverFrom(); 1166 iew.takeOverFrom(); 1167 commit.takeOverFrom(); 1168 1169 assert(!tickEvent.scheduled() || tickEvent.squashed()); 1170 1171 // @todo: Figure out how to properly select the tid to put onto 1172 // the active threads list. 1173 ThreadID tid = 0; 1174 1175 list<ThreadID>::iterator isActive = 1176 std::find(activeThreads.begin(), activeThreads.end(), tid); 1177 1178 if (isActive == activeThreads.end()) { 1179 //May Need to Re-code this if the delay variable is the delay 1180 //needed for thread to activate 1181 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n", 1182 tid); 1183 1184 activeThreads.push_back(tid); 1185 } 1186 1187 // Set all statuses to active, schedule the CPU's tick event. 1188 // @todo: Fix up statuses so this is handled properly 1189 ThreadID size = threadContexts.size(); 1190 for (ThreadID i = 0; i < size; ++i) { 1191 ThreadContext *tc = threadContexts[i]; 1192 if (tc->status() == ThreadContext::Active && _status != Running) { 1193 _status = Running; 1194 reschedule(tickEvent, nextCycle(), true); 1195 } 1196 } 1197 if (!tickEvent.scheduled()) 1198 schedule(tickEvent, nextCycle()); 1199} 1200 1201template <class Impl> 1202TheISA::MiscReg 1203FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) 1204{ 1205 return this->isa[tid].readMiscRegNoEffect(misc_reg); 1206} 1207 1208template <class Impl> 1209TheISA::MiscReg 1210FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid) 1211{ 1212 miscRegfileReads++; 1213 return this->isa[tid].readMiscReg(misc_reg, tcBase(tid)); 1214} 1215 1216template <class Impl> 1217void 1218FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg, 1219 const TheISA::MiscReg &val, ThreadID tid) 1220{ 1221 this->isa[tid].setMiscRegNoEffect(misc_reg, val); 1222} 1223 1224template <class Impl> 1225void 1226FullO3CPU<Impl>::setMiscReg(int misc_reg, 1227 const TheISA::MiscReg &val, ThreadID tid) 1228{ 1229 miscRegfileWrites++; 1230 this->isa[tid].setMiscReg(misc_reg, val, tcBase(tid)); 1231} 1232 1233template <class Impl> 1234uint64_t 1235FullO3CPU<Impl>::readIntReg(int reg_idx) 1236{ 1237 intRegfileReads++; 1238 return regFile.readIntReg(reg_idx); 1239} 1240 1241template <class Impl> 1242FloatReg 1243FullO3CPU<Impl>::readFloatReg(int reg_idx) 1244{ 1245 fpRegfileReads++; 1246 return regFile.readFloatReg(reg_idx); 1247} 1248 1249template <class Impl> 1250FloatRegBits 1251FullO3CPU<Impl>::readFloatRegBits(int reg_idx) 1252{ 1253 fpRegfileReads++; 1254 return regFile.readFloatRegBits(reg_idx); 1255} 1256 1257template <class Impl> 1258void 1259FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val) 1260{ 1261 intRegfileWrites++; 1262 regFile.setIntReg(reg_idx, val); 1263} 1264 1265template <class Impl> 1266void 1267FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val) 1268{ 1269 fpRegfileWrites++; 1270 regFile.setFloatReg(reg_idx, val); 1271} 1272 1273template <class Impl> 1274void 1275FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val) 1276{ 1277 fpRegfileWrites++; 1278 regFile.setFloatRegBits(reg_idx, val); 1279} 1280 1281template <class Impl> 1282uint64_t 1283FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid) 1284{ 1285 intRegfileReads++; 1286 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1287 1288 return regFile.readIntReg(phys_reg); 1289} 1290 1291template <class Impl> 1292float 1293FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid) 1294{ 1295 fpRegfileReads++; 1296 int idx = reg_idx + TheISA::NumIntRegs; 1297 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1298 1299 return regFile.readFloatReg(phys_reg); 1300} 1301 1302template <class Impl> 1303uint64_t 1304FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid) 1305{ 1306 fpRegfileReads++; 1307 int idx = reg_idx + TheISA::NumIntRegs; 1308 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1309 1310 return regFile.readFloatRegBits(phys_reg); 1311} 1312 1313template <class Impl> 1314void 1315FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid) 1316{ 1317 intRegfileWrites++; 1318 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1319 1320 regFile.setIntReg(phys_reg, val); 1321} 1322 1323template <class Impl> 1324void 1325FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid) 1326{ 1327 fpRegfileWrites++; 1328 int idx = reg_idx + TheISA::NumIntRegs; 1329 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1330 1331 regFile.setFloatReg(phys_reg, val); 1332} 1333 1334template <class Impl> 1335void 1336FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid) 1337{ 1338 fpRegfileWrites++; 1339 int idx = reg_idx + TheISA::NumIntRegs; 1340 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1341 1342 regFile.setFloatRegBits(phys_reg, val); 1343} 1344 1345template <class Impl> 1346TheISA::PCState 1347FullO3CPU<Impl>::pcState(ThreadID tid) 1348{ 1349 return commit.pcState(tid); 1350} 1351 1352template <class Impl> 1353void 1354FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid) 1355{ 1356 commit.pcState(val, tid); 1357} 1358 1359template <class Impl> 1360Addr 1361FullO3CPU<Impl>::instAddr(ThreadID tid) 1362{ 1363 return commit.instAddr(tid); 1364} 1365 1366template <class Impl> 1367Addr 1368FullO3CPU<Impl>::nextInstAddr(ThreadID tid) 1369{ 1370 return commit.nextInstAddr(tid); 1371} 1372 1373template <class Impl> 1374MicroPC 1375FullO3CPU<Impl>::microPC(ThreadID tid) 1376{ 1377 return commit.microPC(tid); 1378} 1379 1380template <class Impl> 1381void 1382FullO3CPU<Impl>::squashFromTC(ThreadID tid) 1383{ 1384 this->thread[tid]->inSyscall = true; 1385 this->commit.generateTCEvent(tid); 1386} 1387 1388template <class Impl> 1389typename FullO3CPU<Impl>::ListIt 1390FullO3CPU<Impl>::addInst(DynInstPtr &inst) 1391{ 1392 instList.push_back(inst); 1393 1394 return --(instList.end()); 1395} 1396 1397template <class Impl> 1398void 1399FullO3CPU<Impl>::instDone(ThreadID tid) 1400{ 1401 // Keep an instruction count. 1402 thread[tid]->numInst++; 1403 thread[tid]->numInsts++; 1404 committedInsts[tid]++; 1405 totalCommittedInsts++; 1406 system->totalNumInsts++; 1407 // Check for instruction-count-based events. 1408 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst); 1409 system->instEventQueue.serviceEvents(system->totalNumInsts); 1410} 1411 1412template <class Impl> 1413void 1414FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst) 1415{ 1416 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s " 1417 "[sn:%lli]\n", 1418 inst->threadNumber, inst->pcState(), inst->seqNum); 1419 1420 removeInstsThisCycle = true; 1421 1422 // Remove the front instruction. 1423 removeList.push(inst->getInstListIt()); 1424} 1425 1426template <class Impl> 1427void 1428FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid) 1429{ 1430 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction" 1431 " list.\n", tid); 1432 1433 ListIt end_it; 1434 1435 bool rob_empty = false; 1436 1437 if (instList.empty()) { 1438 return; 1439 } else if (rob.isEmpty(/*tid*/)) { 1440 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n"); 1441 end_it = instList.begin(); 1442 rob_empty = true; 1443 } else { 1444 end_it = (rob.readTailInst(tid))->getInstListIt(); 1445 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n"); 1446 } 1447 1448 removeInstsThisCycle = true; 1449 1450 ListIt inst_it = instList.end(); 1451 1452 inst_it--; 1453 1454 // Walk through the instruction list, removing any instructions 1455 // that were inserted after the given instruction iterator, end_it. 1456 while (inst_it != end_it) { 1457 assert(!instList.empty()); 1458 1459 squashInstIt(inst_it, tid); 1460 1461 inst_it--; 1462 } 1463 1464 // If the ROB was empty, then we actually need to remove the first 1465 // instruction as well. 1466 if (rob_empty) { 1467 squashInstIt(inst_it, tid); 1468 } 1469} 1470 1471template <class Impl> 1472void 1473FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid) 1474{ 1475 assert(!instList.empty()); 1476 1477 removeInstsThisCycle = true; 1478 1479 ListIt inst_iter = instList.end(); 1480 1481 inst_iter--; 1482 1483 DPRINTF(O3CPU, "Deleting instructions from instruction " 1484 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n", 1485 tid, seq_num, (*inst_iter)->seqNum); 1486 1487 while ((*inst_iter)->seqNum > seq_num) { 1488 1489 bool break_loop = (inst_iter == instList.begin()); 1490 1491 squashInstIt(inst_iter, tid); 1492 1493 inst_iter--; 1494 1495 if (break_loop) 1496 break; 1497 } 1498} 1499 1500template <class Impl> 1501inline void 1502FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid) 1503{ 1504 if ((*instIt)->threadNumber == tid) { 1505 DPRINTF(O3CPU, "Squashing instruction, " 1506 "[tid:%i] [sn:%lli] PC %s\n", 1507 (*instIt)->threadNumber, 1508 (*instIt)->seqNum, 1509 (*instIt)->pcState()); 1510 1511 // Mark it as squashed. 1512 (*instIt)->setSquashed(); 1513 1514 // @todo: Formulate a consistent method for deleting 1515 // instructions from the instruction list 1516 // Remove the instruction from the list. 1517 removeList.push(instIt); 1518 } 1519} 1520 1521template <class Impl> 1522void 1523FullO3CPU<Impl>::cleanUpRemovedInsts() 1524{ 1525 while (!removeList.empty()) { 1526 DPRINTF(O3CPU, "Removing instruction, " 1527 "[tid:%i] [sn:%lli] PC %s\n", 1528 (*removeList.front())->threadNumber, 1529 (*removeList.front())->seqNum, 1530 (*removeList.front())->pcState()); 1531 1532 instList.erase(removeList.front()); 1533 1534 removeList.pop(); 1535 } 1536 1537 removeInstsThisCycle = false; 1538} 1539/* 1540template <class Impl> 1541void 1542FullO3CPU<Impl>::removeAllInsts() 1543{ 1544 instList.clear(); 1545} 1546*/ 1547template <class Impl> 1548void 1549FullO3CPU<Impl>::dumpInsts() 1550{ 1551 int num = 0; 1552 1553 ListIt inst_list_it = instList.begin(); 1554 1555 cprintf("Dumping Instruction List\n"); 1556 1557 while (inst_list_it != instList.end()) { 1558 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n" 1559 "Squashed:%i\n\n", 1560 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber, 1561 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(), 1562 (*inst_list_it)->isSquashed()); 1563 inst_list_it++; 1564 ++num; 1565 } 1566} 1567/* 1568template <class Impl> 1569void 1570FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst) 1571{ 1572 iew.wakeDependents(inst); 1573} 1574*/ 1575template <class Impl> 1576void 1577FullO3CPU<Impl>::wakeCPU() 1578{ 1579 if (activityRec.active() || tickEvent.scheduled()) { 1580 DPRINTF(Activity, "CPU already running.\n"); 1581 return; 1582 } 1583 1584 DPRINTF(Activity, "Waking up CPU\n"); 1585 1586 idleCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1587 numCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1588 1589 schedule(tickEvent, nextCycle()); 1590} 1591 1592template <class Impl> 1593void 1594FullO3CPU<Impl>::wakeup() 1595{ 1596 if (this->thread[0]->status() != ThreadContext::Suspended) 1597 return; 1598 1599 this->wakeCPU(); 1600 1601 DPRINTF(Quiesce, "Suspended Processor woken\n"); 1602 this->threadContexts[0]->activate(); 1603} 1604 1605template <class Impl> 1606ThreadID 1607FullO3CPU<Impl>::getFreeTid() 1608{ 1609 for (ThreadID tid = 0; tid < numThreads; tid++) { 1610 if (!tids[tid]) { 1611 tids[tid] = true; 1612 return tid; 1613 } 1614 } 1615 1616 return InvalidThreadID; 1617} 1618 1619template <class Impl> 1620void 1621FullO3CPU<Impl>::doContextSwitch() 1622{ 1623 if (contextSwitch) { 1624 1625 //ADD CODE TO DEACTIVE THREAD HERE (???) 1626 1627 ThreadID size = cpuWaitList.size(); 1628 for (ThreadID tid = 0; tid < size; tid++) { 1629 activateWhenReady(tid); 1630 } 1631 1632 if (cpuWaitList.size() == 0) 1633 contextSwitch = true; 1634 } 1635} 1636 1637template <class Impl> 1638void 1639FullO3CPU<Impl>::updateThreadPriority() 1640{ 1641 if (activeThreads.size() > 1) { 1642 //DEFAULT TO ROUND ROBIN SCHEME 1643 //e.g. Move highest priority to end of thread list 1644 list<ThreadID>::iterator list_begin = activeThreads.begin(); 1645 list<ThreadID>::iterator list_end = activeThreads.end(); 1646 1647 unsigned high_thread = *list_begin; 1648 1649 activeThreads.erase(list_begin); 1650 1651 activeThreads.push_back(high_thread); 1652 } 1653} 1654 1655// Forward declaration of FullO3CPU. 1656template class FullO3CPU<O3CPUImpl>; 1657