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 "config/full_system.hh" 35#include "config/the_isa.hh" 36#include "config/use_checker.hh" 37#include "cpu/o3/cpu.hh" 38#include "cpu/o3/isa_specific.hh" 39#include "cpu/o3/thread_context.hh" 40#include "cpu/activity.hh" 41#include "cpu/simple_thread.hh" 42#include "cpu/thread_context.hh" 43#include "debug/Activity.hh" 44#include "debug/O3CPU.hh" 45#include "debug/Quiesce.hh" 46#include "enums/MemoryMode.hh" 47#include "sim/core.hh" 48#include "sim/stat_control.hh"
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49#include "sim/system.hh" |
50 51#if FULL_SYSTEM 52#include "cpu/quiesce_event.hh"
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52#include "sim/system.hh"
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53#else 54#include "sim/process.hh" 55#endif 56 57#if USE_CHECKER 58#include "cpu/checker/cpu.hh" 59#endif 60 61#if THE_ISA == ALPHA_ISA 62#include "arch/alpha/osfpal.hh" 63#include "debug/Activity.hh" 64#endif 65 66class BaseCPUParams; 67 68using namespace TheISA; 69using namespace std; 70 71BaseO3CPU::BaseO3CPU(BaseCPUParams *params) 72 : BaseCPU(params) 73{ 74} 75 76void 77BaseO3CPU::regStats() 78{ 79 BaseCPU::regStats(); 80} 81 82template <class Impl> 83FullO3CPU<Impl>::TickEvent::TickEvent(FullO3CPU<Impl> *c) 84 : Event(CPU_Tick_Pri), cpu(c) 85{ 86} 87 88template <class Impl> 89void 90FullO3CPU<Impl>::TickEvent::process() 91{ 92 cpu->tick(); 93} 94 95template <class Impl> 96const char * 97FullO3CPU<Impl>::TickEvent::description() const 98{ 99 return "FullO3CPU tick"; 100} 101 102template <class Impl> 103FullO3CPU<Impl>::ActivateThreadEvent::ActivateThreadEvent() 104 : Event(CPU_Switch_Pri) 105{ 106} 107 108template <class Impl> 109void 110FullO3CPU<Impl>::ActivateThreadEvent::init(int thread_num, 111 FullO3CPU<Impl> *thread_cpu) 112{ 113 tid = thread_num; 114 cpu = thread_cpu; 115} 116 117template <class Impl> 118void 119FullO3CPU<Impl>::ActivateThreadEvent::process() 120{ 121 cpu->activateThread(tid); 122} 123 124template <class Impl> 125const char * 126FullO3CPU<Impl>::ActivateThreadEvent::description() const 127{ 128 return "FullO3CPU \"Activate Thread\""; 129} 130 131template <class Impl> 132FullO3CPU<Impl>::DeallocateContextEvent::DeallocateContextEvent() 133 : Event(CPU_Tick_Pri), tid(0), remove(false), cpu(NULL) 134{ 135} 136 137template <class Impl> 138void 139FullO3CPU<Impl>::DeallocateContextEvent::init(int thread_num, 140 FullO3CPU<Impl> *thread_cpu) 141{ 142 tid = thread_num; 143 cpu = thread_cpu; 144 remove = false; 145} 146 147template <class Impl> 148void 149FullO3CPU<Impl>::DeallocateContextEvent::process() 150{ 151 cpu->deactivateThread(tid); 152 if (remove) 153 cpu->removeThread(tid); 154} 155 156template <class Impl> 157const char * 158FullO3CPU<Impl>::DeallocateContextEvent::description() const 159{ 160 return "FullO3CPU \"Deallocate Context\""; 161} 162 163template <class Impl> 164FullO3CPU<Impl>::FullO3CPU(DerivO3CPUParams *params) 165 : BaseO3CPU(params), 166 itb(params->itb), 167 dtb(params->dtb), 168 tickEvent(this), 169#ifndef NDEBUG 170 instcount(0), 171#endif 172 removeInstsThisCycle(false), 173 fetch(this, params), 174 decode(this, params), 175 rename(this, params), 176 iew(this, params), 177 commit(this, params), 178 179 regFile(this, params->numPhysIntRegs, 180 params->numPhysFloatRegs), 181 182 freeList(params->numThreads, 183 TheISA::NumIntRegs, params->numPhysIntRegs, 184 TheISA::NumFloatRegs, params->numPhysFloatRegs), 185 186 rob(this, 187 params->numROBEntries, params->squashWidth, 188 params->smtROBPolicy, params->smtROBThreshold, 189 params->numThreads), 190 191 scoreboard(params->numThreads, 192 TheISA::NumIntRegs, params->numPhysIntRegs, 193 TheISA::NumFloatRegs, params->numPhysFloatRegs, 194 TheISA::NumMiscRegs * numThreads, 195 TheISA::ZeroReg), 196 197 timeBuffer(params->backComSize, params->forwardComSize), 198 fetchQueue(params->backComSize, params->forwardComSize), 199 decodeQueue(params->backComSize, params->forwardComSize), 200 renameQueue(params->backComSize, params->forwardComSize), 201 iewQueue(params->backComSize, params->forwardComSize), 202 activityRec(name(), NumStages, 203 params->backComSize + params->forwardComSize, 204 params->activity), 205 206 globalSeqNum(1),
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207#if FULL_SYSTEM
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207 system(params->system),
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209#endif // FULL_SYSTEM
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208 drainCount(0), 209 deferRegistration(params->defer_registration) 210{ 211 if (!deferRegistration) { 212 _status = Running; 213 } else { 214 _status = Idle; 215 } 216 217#if USE_CHECKER 218 if (params->checker) { 219 BaseCPU *temp_checker = params->checker; 220 checker = dynamic_cast<Checker<DynInstPtr> *>(temp_checker); 221#if FULL_SYSTEM 222 checker->setSystem(params->system); 223#endif 224 } else { 225 checker = NULL; 226 } 227#endif // USE_CHECKER 228 229#if !FULL_SYSTEM 230 thread.resize(numThreads); 231 tids.resize(numThreads); 232#endif 233 234 // The stages also need their CPU pointer setup. However this 235 // must be done at the upper level CPU because they have pointers 236 // to the upper level CPU, and not this FullO3CPU. 237 238 // Set up Pointers to the activeThreads list for each stage 239 fetch.setActiveThreads(&activeThreads); 240 decode.setActiveThreads(&activeThreads); 241 rename.setActiveThreads(&activeThreads); 242 iew.setActiveThreads(&activeThreads); 243 commit.setActiveThreads(&activeThreads); 244 245 // Give each of the stages the time buffer they will use. 246 fetch.setTimeBuffer(&timeBuffer); 247 decode.setTimeBuffer(&timeBuffer); 248 rename.setTimeBuffer(&timeBuffer); 249 iew.setTimeBuffer(&timeBuffer); 250 commit.setTimeBuffer(&timeBuffer); 251 252 // Also setup each of the stages' queues. 253 fetch.setFetchQueue(&fetchQueue); 254 decode.setFetchQueue(&fetchQueue); 255 commit.setFetchQueue(&fetchQueue); 256 decode.setDecodeQueue(&decodeQueue); 257 rename.setDecodeQueue(&decodeQueue); 258 rename.setRenameQueue(&renameQueue); 259 iew.setRenameQueue(&renameQueue); 260 iew.setIEWQueue(&iewQueue); 261 commit.setIEWQueue(&iewQueue); 262 commit.setRenameQueue(&renameQueue); 263 264 commit.setIEWStage(&iew); 265 rename.setIEWStage(&iew); 266 rename.setCommitStage(&commit); 267 268#if !FULL_SYSTEM 269 ThreadID active_threads = params->workload.size(); 270 271 if (active_threads > Impl::MaxThreads) { 272 panic("Workload Size too large. Increase the 'MaxThreads'" 273 "constant in your O3CPU impl. file (e.g. o3/alpha/impl.hh) or " 274 "edit your workload size."); 275 } 276#else 277 ThreadID active_threads = 1; 278#endif 279 280 //Make Sure That this a Valid Architeture 281 assert(params->numPhysIntRegs >= numThreads * TheISA::NumIntRegs); 282 assert(params->numPhysFloatRegs >= numThreads * TheISA::NumFloatRegs); 283 284 rename.setScoreboard(&scoreboard); 285 iew.setScoreboard(&scoreboard); 286 287 // Setup the rename map for whichever stages need it. 288 PhysRegIndex lreg_idx = 0; 289 PhysRegIndex freg_idx = params->numPhysIntRegs; //Index to 1 after int regs 290 291 for (ThreadID tid = 0; tid < numThreads; tid++) { 292 bool bindRegs = (tid <= active_threads - 1); 293 294 commitRenameMap[tid].init(TheISA::NumIntRegs, 295 params->numPhysIntRegs, 296 lreg_idx, //Index for Logical. Regs 297 298 TheISA::NumFloatRegs, 299 params->numPhysFloatRegs, 300 freg_idx, //Index for Float Regs 301 302 TheISA::NumMiscRegs, 303 304 TheISA::ZeroReg, 305 TheISA::ZeroReg, 306 307 tid, 308 false); 309 310 renameMap[tid].init(TheISA::NumIntRegs, 311 params->numPhysIntRegs, 312 lreg_idx, //Index for Logical. Regs 313 314 TheISA::NumFloatRegs, 315 params->numPhysFloatRegs, 316 freg_idx, //Index for Float Regs 317 318 TheISA::NumMiscRegs, 319 320 TheISA::ZeroReg, 321 TheISA::ZeroReg, 322 323 tid, 324 bindRegs); 325 326 activateThreadEvent[tid].init(tid, this); 327 deallocateContextEvent[tid].init(tid, this); 328 } 329 330 rename.setRenameMap(renameMap); 331 commit.setRenameMap(commitRenameMap); 332 333 // Give renameMap & rename stage access to the freeList; 334 for (ThreadID tid = 0; tid < numThreads; tid++) 335 renameMap[tid].setFreeList(&freeList); 336 rename.setFreeList(&freeList); 337 338 // Setup the ROB for whichever stages need it. 339 commit.setROB(&rob); 340 341 lastRunningCycle = curTick(); 342 343 lastActivatedCycle = -1; 344#if 0 345 // Give renameMap & rename stage access to the freeList; 346 for (ThreadID tid = 0; tid < numThreads; tid++) 347 globalSeqNum[tid] = 1; 348#endif 349 350 contextSwitch = false; 351 DPRINTF(O3CPU, "Creating O3CPU object.\n"); 352 353 // Setup any thread state. 354 this->thread.resize(this->numThreads); 355 356 for (ThreadID tid = 0; tid < this->numThreads; ++tid) { 357#if FULL_SYSTEM 358 // SMT is not supported in FS mode yet. 359 assert(this->numThreads == 1); 360 this->thread[tid] = new Thread(this, 0); 361#else 362 if (tid < params->workload.size()) { 363 DPRINTF(O3CPU, "Workload[%i] process is %#x", 364 tid, this->thread[tid]); 365 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 366 (typename Impl::O3CPU *)(this), 367 tid, params->workload[tid]); 368 369 //usedTids[tid] = true; 370 //threadMap[tid] = tid; 371 } else { 372 //Allocate Empty thread so M5 can use later 373 //when scheduling threads to CPU 374 Process* dummy_proc = NULL; 375 376 this->thread[tid] = new typename FullO3CPU<Impl>::Thread( 377 (typename Impl::O3CPU *)(this), 378 tid, dummy_proc); 379 //usedTids[tid] = false; 380 } 381#endif // !FULL_SYSTEM 382 383 ThreadContext *tc; 384 385 // Setup the TC that will serve as the interface to the threads/CPU. 386 O3ThreadContext<Impl> *o3_tc = new O3ThreadContext<Impl>; 387 388 tc = o3_tc; 389 390 // If we're using a checker, then the TC should be the 391 // CheckerThreadContext. 392#if USE_CHECKER 393 if (params->checker) { 394 tc = new CheckerThreadContext<O3ThreadContext<Impl> >( 395 o3_tc, this->checker); 396 } 397#endif 398 399 o3_tc->cpu = (typename Impl::O3CPU *)(this); 400 assert(o3_tc->cpu); 401 o3_tc->thread = this->thread[tid]; 402 403#if FULL_SYSTEM 404 // Setup quiesce event. 405 this->thread[tid]->quiesceEvent = new EndQuiesceEvent(tc); 406#endif 407 // Give the thread the TC. 408 this->thread[tid]->tc = tc; 409 410 // Add the TC to the CPU's list of TC's. 411 this->threadContexts.push_back(tc); 412 } 413 414 for (ThreadID tid = 0; tid < this->numThreads; tid++) 415 this->thread[tid]->setFuncExeInst(0); 416 417 lockAddr = 0; 418 lockFlag = false; 419} 420 421template <class Impl> 422FullO3CPU<Impl>::~FullO3CPU() 423{ 424} 425 426template <class Impl> 427void 428FullO3CPU<Impl>::regStats() 429{ 430 BaseO3CPU::regStats(); 431 432 // Register any of the O3CPU's stats here. 433 timesIdled 434 .name(name() + ".timesIdled") 435 .desc("Number of times that the entire CPU went into an idle state and" 436 " unscheduled itself") 437 .prereq(timesIdled); 438 439 idleCycles 440 .name(name() + ".idleCycles") 441 .desc("Total number of cycles that the CPU has spent unscheduled due " 442 "to idling") 443 .prereq(idleCycles); 444 445 // Number of Instructions simulated 446 // -------------------------------- 447 // Should probably be in Base CPU but need templated 448 // MaxThreads so put in here instead 449 committedInsts 450 .init(numThreads) 451 .name(name() + ".committedInsts") 452 .desc("Number of Instructions Simulated"); 453 454 totalCommittedInsts 455 .name(name() + ".committedInsts_total") 456 .desc("Number of Instructions Simulated"); 457 458 cpi 459 .name(name() + ".cpi") 460 .desc("CPI: Cycles Per Instruction") 461 .precision(6); 462 cpi = numCycles / committedInsts; 463 464 totalCpi 465 .name(name() + ".cpi_total") 466 .desc("CPI: Total CPI of All Threads") 467 .precision(6); 468 totalCpi = numCycles / totalCommittedInsts; 469 470 ipc 471 .name(name() + ".ipc") 472 .desc("IPC: Instructions Per Cycle") 473 .precision(6); 474 ipc = committedInsts / numCycles; 475 476 totalIpc 477 .name(name() + ".ipc_total") 478 .desc("IPC: Total IPC of All Threads") 479 .precision(6); 480 totalIpc = totalCommittedInsts / numCycles; 481 482 this->fetch.regStats(); 483 this->decode.regStats(); 484 this->rename.regStats(); 485 this->iew.regStats(); 486 this->commit.regStats(); 487 this->rob.regStats(); 488 489 intRegfileReads 490 .name(name() + ".int_regfile_reads") 491 .desc("number of integer regfile reads") 492 .prereq(intRegfileReads); 493 494 intRegfileWrites 495 .name(name() + ".int_regfile_writes") 496 .desc("number of integer regfile writes") 497 .prereq(intRegfileWrites); 498 499 fpRegfileReads 500 .name(name() + ".fp_regfile_reads") 501 .desc("number of floating regfile reads") 502 .prereq(fpRegfileReads); 503 504 fpRegfileWrites 505 .name(name() + ".fp_regfile_writes") 506 .desc("number of floating regfile writes") 507 .prereq(fpRegfileWrites); 508 509 miscRegfileReads 510 .name(name() + ".misc_regfile_reads") 511 .desc("number of misc regfile reads") 512 .prereq(miscRegfileReads); 513 514 miscRegfileWrites 515 .name(name() + ".misc_regfile_writes") 516 .desc("number of misc regfile writes") 517 .prereq(miscRegfileWrites); 518} 519 520template <class Impl> 521Port * 522FullO3CPU<Impl>::getPort(const std::string &if_name, int idx) 523{ 524 if (if_name == "dcache_port") 525 return iew.getDcachePort(); 526 else if (if_name == "icache_port") 527 return fetch.getIcachePort(); 528 else 529 panic("No Such Port\n"); 530} 531 532template <class Impl> 533void 534FullO3CPU<Impl>::tick() 535{ 536 DPRINTF(O3CPU, "\n\nFullO3CPU: Ticking main, FullO3CPU.\n"); 537 538 ++numCycles; 539 540// activity = false; 541 542 //Tick each of the stages 543 fetch.tick(); 544 545 decode.tick(); 546 547 rename.tick(); 548 549 iew.tick(); 550 551 commit.tick(); 552 553#if !FULL_SYSTEM 554 doContextSwitch(); 555#endif 556 557 // Now advance the time buffers 558 timeBuffer.advance(); 559 560 fetchQueue.advance(); 561 decodeQueue.advance(); 562 renameQueue.advance(); 563 iewQueue.advance(); 564 565 activityRec.advance(); 566 567 if (removeInstsThisCycle) { 568 cleanUpRemovedInsts(); 569 } 570 571 if (!tickEvent.scheduled()) { 572 if (_status == SwitchedOut || 573 getState() == SimObject::Drained) { 574 DPRINTF(O3CPU, "Switched out!\n"); 575 // increment stat 576 lastRunningCycle = curTick(); 577 } else if (!activityRec.active() || _status == Idle) { 578 DPRINTF(O3CPU, "Idle!\n"); 579 lastRunningCycle = curTick(); 580 timesIdled++; 581 } else { 582 schedule(tickEvent, nextCycle(curTick() + ticks(1))); 583 DPRINTF(O3CPU, "Scheduling next tick!\n"); 584 } 585 } 586 587#if !FULL_SYSTEM 588 updateThreadPriority(); 589#endif 590} 591 592template <class Impl> 593void 594FullO3CPU<Impl>::init() 595{ 596 BaseCPU::init(); 597 598 // Set inSyscall so that the CPU doesn't squash when initially 599 // setting up registers. 600 for (ThreadID tid = 0; tid < numThreads; ++tid) 601 thread[tid]->inSyscall = true; 602 603#if FULL_SYSTEM 604 for (ThreadID tid = 0; tid < numThreads; tid++) { 605 ThreadContext *src_tc = threadContexts[tid]; 606 TheISA::initCPU(src_tc, src_tc->contextId()); 607 } 608#endif 609 610 // Clear inSyscall. 611 for (int tid = 0; tid < numThreads; ++tid) 612 thread[tid]->inSyscall = false; 613 614 // Initialize stages. 615 fetch.initStage(); 616 iew.initStage(); 617 rename.initStage(); 618 commit.initStage(); 619 620 commit.setThreads(thread); 621} 622 623template <class Impl> 624void 625FullO3CPU<Impl>::activateThread(ThreadID tid) 626{ 627 list<ThreadID>::iterator isActive = 628 std::find(activeThreads.begin(), activeThreads.end(), tid); 629 630 DPRINTF(O3CPU, "[tid:%i]: Calling activate thread.\n", tid); 631 632 if (isActive == activeThreads.end()) { 633 DPRINTF(O3CPU, "[tid:%i]: Adding to active threads list\n", 634 tid); 635 636 activeThreads.push_back(tid); 637 } 638} 639 640template <class Impl> 641void 642FullO3CPU<Impl>::deactivateThread(ThreadID tid) 643{ 644 //Remove From Active List, if Active 645 list<ThreadID>::iterator thread_it = 646 std::find(activeThreads.begin(), activeThreads.end(), tid); 647 648 DPRINTF(O3CPU, "[tid:%i]: Calling deactivate thread.\n", tid); 649 650 if (thread_it != activeThreads.end()) { 651 DPRINTF(O3CPU,"[tid:%i]: Removing from active threads list\n", 652 tid); 653 activeThreads.erase(thread_it); 654 } 655} 656 657template <class Impl> 658Counter 659FullO3CPU<Impl>::totalInstructions() const 660{ 661 Counter total(0); 662 663 ThreadID size = thread.size(); 664 for (ThreadID i = 0; i < size; i++) 665 total += thread[i]->numInst; 666 667 return total; 668} 669 670template <class Impl> 671void 672FullO3CPU<Impl>::activateContext(ThreadID tid, int delay) 673{ 674 // Needs to set each stage to running as well. 675 if (delay){ 676 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to activate " 677 "on cycle %d\n", tid, curTick() + ticks(delay)); 678 scheduleActivateThreadEvent(tid, delay); 679 } else { 680 activateThread(tid); 681 } 682 683 if (lastActivatedCycle < curTick()) { 684 scheduleTickEvent(delay); 685 686 // Be sure to signal that there's some activity so the CPU doesn't 687 // deschedule itself. 688 activityRec.activity(); 689 fetch.wakeFromQuiesce(); 690 691 lastActivatedCycle = curTick(); 692 693 _status = Running; 694 } 695} 696 697template <class Impl> 698bool 699FullO3CPU<Impl>::deallocateContext(ThreadID tid, bool remove, int delay) 700{ 701 // Schedule removal of thread data from CPU 702 if (delay){ 703 DPRINTF(O3CPU, "[tid:%i]: Scheduling thread context to deallocate " 704 "on cycle %d\n", tid, curTick() + ticks(delay)); 705 scheduleDeallocateContextEvent(tid, remove, delay); 706 return false; 707 } else { 708 deactivateThread(tid); 709 if (remove) 710 removeThread(tid); 711 return true; 712 } 713} 714 715template <class Impl> 716void 717FullO3CPU<Impl>::suspendContext(ThreadID tid) 718{ 719 DPRINTF(O3CPU,"[tid: %i]: Suspending Thread Context.\n", tid); 720 bool deallocated = deallocateContext(tid, false, 1); 721 // If this was the last thread then unschedule the tick event. 722 if ((activeThreads.size() == 1 && !deallocated) || 723 activeThreads.size() == 0) 724 unscheduleTickEvent(); 725 _status = Idle; 726} 727 728template <class Impl> 729void 730FullO3CPU<Impl>::haltContext(ThreadID tid) 731{ 732 //For now, this is the same as deallocate 733 DPRINTF(O3CPU,"[tid:%i]: Halt Context called. Deallocating", tid); 734 deallocateContext(tid, true, 1); 735} 736 737template <class Impl> 738void 739FullO3CPU<Impl>::insertThread(ThreadID tid) 740{ 741 DPRINTF(O3CPU,"[tid:%i] Initializing thread into CPU"); 742 // Will change now that the PC and thread state is internal to the CPU 743 // and not in the ThreadContext. 744#if FULL_SYSTEM 745 ThreadContext *src_tc = system->threadContexts[tid]; 746#else 747 ThreadContext *src_tc = tcBase(tid); 748#endif 749 750 //Bind Int Regs to Rename Map 751 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 752 PhysRegIndex phys_reg = freeList.getIntReg(); 753 754 renameMap[tid].setEntry(ireg,phys_reg); 755 scoreboard.setReg(phys_reg); 756 } 757 758 //Bind Float Regs to Rename Map 759 for (int freg = 0; freg < TheISA::NumFloatRegs; freg++) { 760 PhysRegIndex phys_reg = freeList.getFloatReg(); 761 762 renameMap[tid].setEntry(freg,phys_reg); 763 scoreboard.setReg(phys_reg); 764 } 765 766 //Copy Thread Data Into RegFile 767 //this->copyFromTC(tid); 768 769 //Set PC/NPC/NNPC 770 pcState(src_tc->pcState(), tid); 771 772 src_tc->setStatus(ThreadContext::Active); 773 774 activateContext(tid,1); 775 776 //Reset ROB/IQ/LSQ Entries 777 commit.rob->resetEntries(); 778 iew.resetEntries(); 779} 780 781template <class Impl> 782void 783FullO3CPU<Impl>::removeThread(ThreadID tid) 784{ 785 DPRINTF(O3CPU,"[tid:%i] Removing thread context from CPU.\n", tid); 786 787 // Copy Thread Data From RegFile 788 // If thread is suspended, it might be re-allocated 789 // this->copyToTC(tid); 790 791 792 // @todo: 2-27-2008: Fix how we free up rename mappings 793 // here to alleviate the case for double-freeing registers 794 // in SMT workloads. 795 796 // Unbind Int Regs from Rename Map 797 for (int ireg = 0; ireg < TheISA::NumIntRegs; ireg++) { 798 PhysRegIndex phys_reg = renameMap[tid].lookup(ireg); 799 800 scoreboard.unsetReg(phys_reg); 801 freeList.addReg(phys_reg); 802 } 803 804 // Unbind Float Regs from Rename Map 805 for (int freg = TheISA::NumIntRegs; freg < TheISA::NumFloatRegs; freg++) { 806 PhysRegIndex phys_reg = renameMap[tid].lookup(freg); 807 808 scoreboard.unsetReg(phys_reg); 809 freeList.addReg(phys_reg); 810 } 811 812 // Squash Throughout Pipeline 813 DynInstPtr inst = commit.rob->readHeadInst(tid); 814 InstSeqNum squash_seq_num = inst->seqNum; 815 fetch.squash(0, squash_seq_num, inst, tid); 816 decode.squash(tid); 817 rename.squash(squash_seq_num, tid); 818 iew.squash(tid); 819 iew.ldstQueue.squash(squash_seq_num, tid); 820 commit.rob->squash(squash_seq_num, tid); 821 822 823 assert(iew.instQueue.getCount(tid) == 0); 824 assert(iew.ldstQueue.getCount(tid) == 0); 825 826 // Reset ROB/IQ/LSQ Entries 827 828 // Commented out for now. This should be possible to do by 829 // telling all the pipeline stages to drain first, and then 830 // checking until the drain completes. Once the pipeline is 831 // drained, call resetEntries(). - 10-09-06 ktlim 832/* 833 if (activeThreads.size() >= 1) { 834 commit.rob->resetEntries(); 835 iew.resetEntries(); 836 } 837*/ 838} 839 840 841template <class Impl> 842void 843FullO3CPU<Impl>::activateWhenReady(ThreadID tid) 844{ 845 DPRINTF(O3CPU,"[tid:%i]: Checking if resources are available for incoming" 846 "(e.g. PhysRegs/ROB/IQ/LSQ) \n", 847 tid); 848 849 bool ready = true; 850 851 if (freeList.numFreeIntRegs() >= TheISA::NumIntRegs) { 852 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 853 "Phys. Int. Regs.\n", 854 tid); 855 ready = false; 856 } else if (freeList.numFreeFloatRegs() >= TheISA::NumFloatRegs) { 857 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 858 "Phys. Float. Regs.\n", 859 tid); 860 ready = false; 861 } else if (commit.rob->numFreeEntries() >= 862 commit.rob->entryAmount(activeThreads.size() + 1)) { 863 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 864 "ROB entries.\n", 865 tid); 866 ready = false; 867 } else if (iew.instQueue.numFreeEntries() >= 868 iew.instQueue.entryAmount(activeThreads.size() + 1)) { 869 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 870 "IQ entries.\n", 871 tid); 872 ready = false; 873 } else if (iew.ldstQueue.numFreeEntries() >= 874 iew.ldstQueue.entryAmount(activeThreads.size() + 1)) { 875 DPRINTF(O3CPU,"[tid:%i] Suspending thread due to not enough " 876 "LSQ entries.\n", 877 tid); 878 ready = false; 879 } 880 881 if (ready) { 882 insertThread(tid); 883 884 contextSwitch = false; 885 886 cpuWaitList.remove(tid); 887 } else { 888 suspendContext(tid); 889 890 //blocks fetch 891 contextSwitch = true; 892 893 //@todo: dont always add to waitlist 894 //do waitlist 895 cpuWaitList.push_back(tid); 896 } 897} 898 899#if FULL_SYSTEM 900template <class Impl> 901Fault 902FullO3CPU<Impl>::hwrei(ThreadID tid) 903{ 904#if THE_ISA == ALPHA_ISA 905 // Need to clear the lock flag upon returning from an interrupt. 906 this->setMiscRegNoEffect(AlphaISA::MISCREG_LOCKFLAG, false, tid); 907 908 this->thread[tid]->kernelStats->hwrei(); 909 910 // FIXME: XXX check for interrupts? XXX 911#endif 912 return NoFault; 913} 914 915template <class Impl> 916bool 917FullO3CPU<Impl>::simPalCheck(int palFunc, ThreadID tid) 918{ 919#if THE_ISA == ALPHA_ISA 920 if (this->thread[tid]->kernelStats) 921 this->thread[tid]->kernelStats->callpal(palFunc, 922 this->threadContexts[tid]); 923 924 switch (palFunc) { 925 case PAL::halt: 926 halt(); 927 if (--System::numSystemsRunning == 0) 928 exitSimLoop("all cpus halted"); 929 break; 930 931 case PAL::bpt: 932 case PAL::bugchk: 933 if (this->system->breakpoint()) 934 return false; 935 break; 936 } 937#endif 938 return true; 939} 940 941template <class Impl> 942Fault 943FullO3CPU<Impl>::getInterrupts() 944{ 945 // Check if there are any outstanding interrupts 946 return this->interrupts->getInterrupt(this->threadContexts[0]); 947} 948 949template <class Impl> 950void 951FullO3CPU<Impl>::processInterrupts(Fault interrupt) 952{ 953 // Check for interrupts here. For now can copy the code that 954 // exists within isa_fullsys_traits.hh. Also assume that thread 0 955 // is the one that handles the interrupts. 956 // @todo: Possibly consolidate the interrupt checking code. 957 // @todo: Allow other threads to handle interrupts. 958 959 assert(interrupt != NoFault); 960 this->interrupts->updateIntrInfo(this->threadContexts[0]); 961 962 DPRINTF(O3CPU, "Interrupt %s being handled\n", interrupt->name()); 963 this->trap(interrupt, 0, NULL); 964} 965 966template <class Impl> 967void 968FullO3CPU<Impl>::updateMemPorts() 969{ 970 // Update all ThreadContext's memory ports (Functional/Virtual 971 // Ports) 972 ThreadID size = thread.size(); 973 for (ThreadID i = 0; i < size; ++i) 974 thread[i]->connectMemPorts(thread[i]->getTC()); 975} 976#endif 977 978template <class Impl> 979void 980FullO3CPU<Impl>::trap(Fault fault, ThreadID tid, StaticInstPtr inst) 981{ 982 // Pass the thread's TC into the invoke method. 983 fault->invoke(this->threadContexts[tid], inst); 984} 985 986#if !FULL_SYSTEM 987 988template <class Impl> 989void 990FullO3CPU<Impl>::syscall(int64_t callnum, ThreadID tid) 991{ 992 DPRINTF(O3CPU, "[tid:%i] Executing syscall().\n\n", tid); 993 994 DPRINTF(Activity,"Activity: syscall() called.\n"); 995 996 // Temporarily increase this by one to account for the syscall 997 // instruction. 998 ++(this->thread[tid]->funcExeInst); 999 1000 // Execute the actual syscall. 1001 this->thread[tid]->syscall(callnum); 1002 1003 // Decrease funcExeInst by one as the normal commit will handle 1004 // incrementing it. 1005 --(this->thread[tid]->funcExeInst); 1006} 1007 1008#endif 1009 1010template <class Impl> 1011void 1012FullO3CPU<Impl>::serialize(std::ostream &os) 1013{ 1014 SimObject::State so_state = SimObject::getState(); 1015 SERIALIZE_ENUM(so_state); 1016 BaseCPU::serialize(os); 1017 nameOut(os, csprintf("%s.tickEvent", name())); 1018 tickEvent.serialize(os); 1019 1020 // Use SimpleThread's ability to checkpoint to make it easier to 1021 // write out the registers. Also make this static so it doesn't 1022 // get instantiated multiple times (causes a panic in statistics). 1023 static SimpleThread temp; 1024 1025 ThreadID size = thread.size(); 1026 for (ThreadID i = 0; i < size; i++) { 1027 nameOut(os, csprintf("%s.xc.%i", name(), i)); 1028 temp.copyTC(thread[i]->getTC()); 1029 temp.serialize(os); 1030 } 1031} 1032 1033template <class Impl> 1034void 1035FullO3CPU<Impl>::unserialize(Checkpoint *cp, const std::string §ion) 1036{ 1037 SimObject::State so_state; 1038 UNSERIALIZE_ENUM(so_state); 1039 BaseCPU::unserialize(cp, section); 1040 tickEvent.unserialize(cp, csprintf("%s.tickEvent", section)); 1041 1042 // Use SimpleThread's ability to checkpoint to make it easier to 1043 // read in the registers. Also make this static so it doesn't 1044 // get instantiated multiple times (causes a panic in statistics). 1045 static SimpleThread temp; 1046 1047 ThreadID size = thread.size(); 1048 for (ThreadID i = 0; i < size; i++) { 1049 temp.copyTC(thread[i]->getTC()); 1050 temp.unserialize(cp, csprintf("%s.xc.%i", section, i)); 1051 thread[i]->getTC()->copyArchRegs(temp.getTC()); 1052 } 1053} 1054 1055template <class Impl> 1056unsigned int 1057FullO3CPU<Impl>::drain(Event *drain_event) 1058{ 1059 DPRINTF(O3CPU, "Switching out\n"); 1060 1061 // If the CPU isn't doing anything, then return immediately. 1062 if (_status == Idle || _status == SwitchedOut) { 1063 return 0; 1064 } 1065 1066 drainCount = 0; 1067 fetch.drain(); 1068 decode.drain(); 1069 rename.drain(); 1070 iew.drain(); 1071 commit.drain(); 1072 1073 // Wake the CPU and record activity so everything can drain out if 1074 // the CPU was not able to immediately drain. 1075 if (getState() != SimObject::Drained) { 1076 // A bit of a hack...set the drainEvent after all the drain() 1077 // calls have been made, that way if all of the stages drain 1078 // immediately, the signalDrained() function knows not to call 1079 // process on the drain event. 1080 drainEvent = drain_event; 1081 1082 wakeCPU(); 1083 activityRec.activity(); 1084 1085 return 1; 1086 } else { 1087 return 0; 1088 } 1089} 1090 1091template <class Impl> 1092void 1093FullO3CPU<Impl>::resume() 1094{ 1095 fetch.resume(); 1096 decode.resume(); 1097 rename.resume(); 1098 iew.resume(); 1099 commit.resume(); 1100 1101 changeState(SimObject::Running); 1102 1103 if (_status == SwitchedOut || _status == Idle) 1104 return; 1105
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1108#if FULL_SYSTEM
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1106 assert(system->getMemoryMode() == Enums::timing);
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1110#endif
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1107 1108 if (!tickEvent.scheduled()) 1109 schedule(tickEvent, nextCycle()); 1110 _status = Running; 1111} 1112 1113template <class Impl> 1114void 1115FullO3CPU<Impl>::signalDrained() 1116{ 1117 if (++drainCount == NumStages) { 1118 if (tickEvent.scheduled()) 1119 tickEvent.squash(); 1120 1121 changeState(SimObject::Drained); 1122 1123 BaseCPU::switchOut(); 1124 1125 if (drainEvent) { 1126 drainEvent->process(); 1127 drainEvent = NULL; 1128 } 1129 } 1130 assert(drainCount <= 5); 1131} 1132 1133template <class Impl> 1134void 1135FullO3CPU<Impl>::switchOut() 1136{ 1137 fetch.switchOut(); 1138 rename.switchOut(); 1139 iew.switchOut(); 1140 commit.switchOut(); 1141 instList.clear(); 1142 while (!removeList.empty()) { 1143 removeList.pop(); 1144 } 1145 1146 _status = SwitchedOut; 1147#if USE_CHECKER 1148 if (checker) 1149 checker->switchOut(); 1150#endif 1151 if (tickEvent.scheduled()) 1152 tickEvent.squash(); 1153} 1154 1155template <class Impl> 1156void 1157FullO3CPU<Impl>::takeOverFrom(BaseCPU *oldCPU) 1158{ 1159 // Flush out any old data from the time buffers. 1160 for (int i = 0; i < timeBuffer.getSize(); ++i) { 1161 timeBuffer.advance(); 1162 fetchQueue.advance(); 1163 decodeQueue.advance(); 1164 renameQueue.advance(); 1165 iewQueue.advance(); 1166 } 1167 1168 activityRec.reset(); 1169 1170 BaseCPU::takeOverFrom(oldCPU, fetch.getIcachePort(), iew.getDcachePort()); 1171 1172 fetch.takeOverFrom(); 1173 decode.takeOverFrom(); 1174 rename.takeOverFrom(); 1175 iew.takeOverFrom(); 1176 commit.takeOverFrom(); 1177 1178 assert(!tickEvent.scheduled() || tickEvent.squashed()); 1179 1180 // @todo: Figure out how to properly select the tid to put onto 1181 // the active threads list. 1182 ThreadID tid = 0; 1183 1184 list<ThreadID>::iterator isActive = 1185 std::find(activeThreads.begin(), activeThreads.end(), tid); 1186 1187 if (isActive == activeThreads.end()) { 1188 //May Need to Re-code this if the delay variable is the delay 1189 //needed for thread to activate 1190 DPRINTF(O3CPU, "Adding Thread %i to active threads list\n", 1191 tid); 1192 1193 activeThreads.push_back(tid); 1194 } 1195 1196 // Set all statuses to active, schedule the CPU's tick event. 1197 // @todo: Fix up statuses so this is handled properly 1198 ThreadID size = threadContexts.size(); 1199 for (ThreadID i = 0; i < size; ++i) { 1200 ThreadContext *tc = threadContexts[i]; 1201 if (tc->status() == ThreadContext::Active && _status != Running) { 1202 _status = Running; 1203 reschedule(tickEvent, nextCycle(), true); 1204 } 1205 } 1206 if (!tickEvent.scheduled()) 1207 schedule(tickEvent, nextCycle()); 1208} 1209 1210template <class Impl> 1211TheISA::MiscReg 1212FullO3CPU<Impl>::readMiscRegNoEffect(int misc_reg, ThreadID tid) 1213{ 1214 return this->isa[tid].readMiscRegNoEffect(misc_reg); 1215} 1216 1217template <class Impl> 1218TheISA::MiscReg 1219FullO3CPU<Impl>::readMiscReg(int misc_reg, ThreadID tid) 1220{ 1221 miscRegfileReads++; 1222 return this->isa[tid].readMiscReg(misc_reg, tcBase(tid)); 1223} 1224 1225template <class Impl> 1226void 1227FullO3CPU<Impl>::setMiscRegNoEffect(int misc_reg, 1228 const TheISA::MiscReg &val, ThreadID tid) 1229{ 1230 this->isa[tid].setMiscRegNoEffect(misc_reg, val); 1231} 1232 1233template <class Impl> 1234void 1235FullO3CPU<Impl>::setMiscReg(int misc_reg, 1236 const TheISA::MiscReg &val, ThreadID tid) 1237{ 1238 miscRegfileWrites++; 1239 this->isa[tid].setMiscReg(misc_reg, val, tcBase(tid)); 1240} 1241 1242template <class Impl> 1243uint64_t 1244FullO3CPU<Impl>::readIntReg(int reg_idx) 1245{ 1246 intRegfileReads++; 1247 return regFile.readIntReg(reg_idx); 1248} 1249 1250template <class Impl> 1251FloatReg 1252FullO3CPU<Impl>::readFloatReg(int reg_idx) 1253{ 1254 fpRegfileReads++; 1255 return regFile.readFloatReg(reg_idx); 1256} 1257 1258template <class Impl> 1259FloatRegBits 1260FullO3CPU<Impl>::readFloatRegBits(int reg_idx) 1261{ 1262 fpRegfileReads++; 1263 return regFile.readFloatRegBits(reg_idx); 1264} 1265 1266template <class Impl> 1267void 1268FullO3CPU<Impl>::setIntReg(int reg_idx, uint64_t val) 1269{ 1270 intRegfileWrites++; 1271 regFile.setIntReg(reg_idx, val); 1272} 1273 1274template <class Impl> 1275void 1276FullO3CPU<Impl>::setFloatReg(int reg_idx, FloatReg val) 1277{ 1278 fpRegfileWrites++; 1279 regFile.setFloatReg(reg_idx, val); 1280} 1281 1282template <class Impl> 1283void 1284FullO3CPU<Impl>::setFloatRegBits(int reg_idx, FloatRegBits val) 1285{ 1286 fpRegfileWrites++; 1287 regFile.setFloatRegBits(reg_idx, val); 1288} 1289 1290template <class Impl> 1291uint64_t 1292FullO3CPU<Impl>::readArchIntReg(int reg_idx, ThreadID tid) 1293{ 1294 intRegfileReads++; 1295 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1296 1297 return regFile.readIntReg(phys_reg); 1298} 1299 1300template <class Impl> 1301float 1302FullO3CPU<Impl>::readArchFloatReg(int reg_idx, ThreadID tid) 1303{ 1304 fpRegfileReads++; 1305 int idx = reg_idx + TheISA::NumIntRegs; 1306 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1307 1308 return regFile.readFloatReg(phys_reg); 1309} 1310 1311template <class Impl> 1312uint64_t 1313FullO3CPU<Impl>::readArchFloatRegInt(int reg_idx, ThreadID tid) 1314{ 1315 fpRegfileReads++; 1316 int idx = reg_idx + TheISA::NumIntRegs; 1317 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1318 1319 return regFile.readFloatRegBits(phys_reg); 1320} 1321 1322template <class Impl> 1323void 1324FullO3CPU<Impl>::setArchIntReg(int reg_idx, uint64_t val, ThreadID tid) 1325{ 1326 intRegfileWrites++; 1327 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(reg_idx); 1328 1329 regFile.setIntReg(phys_reg, val); 1330} 1331 1332template <class Impl> 1333void 1334FullO3CPU<Impl>::setArchFloatReg(int reg_idx, float val, ThreadID tid) 1335{ 1336 fpRegfileWrites++; 1337 int idx = reg_idx + TheISA::NumIntRegs; 1338 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1339 1340 regFile.setFloatReg(phys_reg, val); 1341} 1342 1343template <class Impl> 1344void 1345FullO3CPU<Impl>::setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid) 1346{ 1347 fpRegfileWrites++; 1348 int idx = reg_idx + TheISA::NumIntRegs; 1349 PhysRegIndex phys_reg = commitRenameMap[tid].lookup(idx); 1350 1351 regFile.setFloatRegBits(phys_reg, val); 1352} 1353 1354template <class Impl> 1355TheISA::PCState 1356FullO3CPU<Impl>::pcState(ThreadID tid) 1357{ 1358 return commit.pcState(tid); 1359} 1360 1361template <class Impl> 1362void 1363FullO3CPU<Impl>::pcState(const TheISA::PCState &val, ThreadID tid) 1364{ 1365 commit.pcState(val, tid); 1366} 1367 1368template <class Impl> 1369Addr 1370FullO3CPU<Impl>::instAddr(ThreadID tid) 1371{ 1372 return commit.instAddr(tid); 1373} 1374 1375template <class Impl> 1376Addr 1377FullO3CPU<Impl>::nextInstAddr(ThreadID tid) 1378{ 1379 return commit.nextInstAddr(tid); 1380} 1381 1382template <class Impl> 1383MicroPC 1384FullO3CPU<Impl>::microPC(ThreadID tid) 1385{ 1386 return commit.microPC(tid); 1387} 1388 1389template <class Impl> 1390void 1391FullO3CPU<Impl>::squashFromTC(ThreadID tid) 1392{ 1393 this->thread[tid]->inSyscall = true; 1394 this->commit.generateTCEvent(tid); 1395} 1396 1397template <class Impl> 1398typename FullO3CPU<Impl>::ListIt 1399FullO3CPU<Impl>::addInst(DynInstPtr &inst) 1400{ 1401 instList.push_back(inst); 1402 1403 return --(instList.end()); 1404} 1405 1406template <class Impl> 1407void 1408FullO3CPU<Impl>::instDone(ThreadID tid) 1409{ 1410 // Keep an instruction count. 1411 thread[tid]->numInst++; 1412 thread[tid]->numInsts++; 1413 committedInsts[tid]++; 1414 totalCommittedInsts++; 1415 system->totalNumInsts++; 1416 // Check for instruction-count-based events. 1417 comInstEventQueue[tid]->serviceEvents(thread[tid]->numInst); 1418 system->instEventQueue.serviceEvents(system->totalNumInsts); 1419} 1420 1421template <class Impl> 1422void 1423FullO3CPU<Impl>::addToRemoveList(DynInstPtr &inst) 1424{ 1425 removeInstsThisCycle = true; 1426 1427 removeList.push(inst->getInstListIt()); 1428} 1429 1430template <class Impl> 1431void 1432FullO3CPU<Impl>::removeFrontInst(DynInstPtr &inst) 1433{ 1434 DPRINTF(O3CPU, "Removing committed instruction [tid:%i] PC %s " 1435 "[sn:%lli]\n", 1436 inst->threadNumber, inst->pcState(), inst->seqNum); 1437 1438 removeInstsThisCycle = true; 1439 1440 // Remove the front instruction. 1441 removeList.push(inst->getInstListIt()); 1442} 1443 1444template <class Impl> 1445void 1446FullO3CPU<Impl>::removeInstsNotInROB(ThreadID tid) 1447{ 1448 DPRINTF(O3CPU, "Thread %i: Deleting instructions from instruction" 1449 " list.\n", tid); 1450 1451 ListIt end_it; 1452 1453 bool rob_empty = false; 1454 1455 if (instList.empty()) { 1456 return; 1457 } else if (rob.isEmpty(/*tid*/)) { 1458 DPRINTF(O3CPU, "ROB is empty, squashing all insts.\n"); 1459 end_it = instList.begin(); 1460 rob_empty = true; 1461 } else { 1462 end_it = (rob.readTailInst(tid))->getInstListIt(); 1463 DPRINTF(O3CPU, "ROB is not empty, squashing insts not in ROB.\n"); 1464 } 1465 1466 removeInstsThisCycle = true; 1467 1468 ListIt inst_it = instList.end(); 1469 1470 inst_it--; 1471 1472 // Walk through the instruction list, removing any instructions 1473 // that were inserted after the given instruction iterator, end_it. 1474 while (inst_it != end_it) { 1475 assert(!instList.empty()); 1476 1477 squashInstIt(inst_it, tid); 1478 1479 inst_it--; 1480 } 1481 1482 // If the ROB was empty, then we actually need to remove the first 1483 // instruction as well. 1484 if (rob_empty) { 1485 squashInstIt(inst_it, tid); 1486 } 1487} 1488 1489template <class Impl> 1490void 1491FullO3CPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid) 1492{ 1493 assert(!instList.empty()); 1494 1495 removeInstsThisCycle = true; 1496 1497 ListIt inst_iter = instList.end(); 1498 1499 inst_iter--; 1500 1501 DPRINTF(O3CPU, "Deleting instructions from instruction " 1502 "list that are from [tid:%i] and above [sn:%lli] (end=%lli).\n", 1503 tid, seq_num, (*inst_iter)->seqNum); 1504 1505 while ((*inst_iter)->seqNum > seq_num) { 1506 1507 bool break_loop = (inst_iter == instList.begin()); 1508 1509 squashInstIt(inst_iter, tid); 1510 1511 inst_iter--; 1512 1513 if (break_loop) 1514 break; 1515 } 1516} 1517 1518template <class Impl> 1519inline void 1520FullO3CPU<Impl>::squashInstIt(const ListIt &instIt, ThreadID tid) 1521{ 1522 if ((*instIt)->threadNumber == tid) { 1523 DPRINTF(O3CPU, "Squashing instruction, " 1524 "[tid:%i] [sn:%lli] PC %s\n", 1525 (*instIt)->threadNumber, 1526 (*instIt)->seqNum, 1527 (*instIt)->pcState()); 1528 1529 // Mark it as squashed. 1530 (*instIt)->setSquashed(); 1531 1532 // @todo: Formulate a consistent method for deleting 1533 // instructions from the instruction list 1534 // Remove the instruction from the list. 1535 removeList.push(instIt); 1536 } 1537} 1538 1539template <class Impl> 1540void 1541FullO3CPU<Impl>::cleanUpRemovedInsts() 1542{ 1543 while (!removeList.empty()) { 1544 DPRINTF(O3CPU, "Removing instruction, " 1545 "[tid:%i] [sn:%lli] PC %s\n", 1546 (*removeList.front())->threadNumber, 1547 (*removeList.front())->seqNum, 1548 (*removeList.front())->pcState()); 1549 1550 instList.erase(removeList.front()); 1551 1552 removeList.pop(); 1553 } 1554 1555 removeInstsThisCycle = false; 1556} 1557/* 1558template <class Impl> 1559void 1560FullO3CPU<Impl>::removeAllInsts() 1561{ 1562 instList.clear(); 1563} 1564*/ 1565template <class Impl> 1566void 1567FullO3CPU<Impl>::dumpInsts() 1568{ 1569 int num = 0; 1570 1571 ListIt inst_list_it = instList.begin(); 1572 1573 cprintf("Dumping Instruction List\n"); 1574 1575 while (inst_list_it != instList.end()) { 1576 cprintf("Instruction:%i\nPC:%#x\n[tid:%i]\n[sn:%lli]\nIssued:%i\n" 1577 "Squashed:%i\n\n", 1578 num, (*inst_list_it)->instAddr(), (*inst_list_it)->threadNumber, 1579 (*inst_list_it)->seqNum, (*inst_list_it)->isIssued(), 1580 (*inst_list_it)->isSquashed()); 1581 inst_list_it++; 1582 ++num; 1583 } 1584} 1585/* 1586template <class Impl> 1587void 1588FullO3CPU<Impl>::wakeDependents(DynInstPtr &inst) 1589{ 1590 iew.wakeDependents(inst); 1591} 1592*/ 1593template <class Impl> 1594void 1595FullO3CPU<Impl>::wakeCPU() 1596{ 1597 if (activityRec.active() || tickEvent.scheduled()) { 1598 DPRINTF(Activity, "CPU already running.\n"); 1599 return; 1600 } 1601 1602 DPRINTF(Activity, "Waking up CPU\n"); 1603 1604 idleCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1605 numCycles += tickToCycles((curTick() - 1) - lastRunningCycle); 1606 1607 schedule(tickEvent, nextCycle()); 1608} 1609 1610#if FULL_SYSTEM 1611template <class Impl> 1612void 1613FullO3CPU<Impl>::wakeup() 1614{ 1615 if (this->thread[0]->status() != ThreadContext::Suspended) 1616 return; 1617 1618 this->wakeCPU(); 1619 1620 DPRINTF(Quiesce, "Suspended Processor woken\n"); 1621 this->threadContexts[0]->activate(); 1622} 1623#endif 1624 1625template <class Impl> 1626ThreadID 1627FullO3CPU<Impl>::getFreeTid() 1628{ 1629 for (ThreadID tid = 0; tid < numThreads; tid++) { 1630 if (!tids[tid]) { 1631 tids[tid] = true; 1632 return tid; 1633 } 1634 } 1635 1636 return InvalidThreadID; 1637} 1638 1639template <class Impl> 1640void 1641FullO3CPU<Impl>::doContextSwitch() 1642{ 1643 if (contextSwitch) { 1644 1645 //ADD CODE TO DEACTIVE THREAD HERE (???) 1646 1647 ThreadID size = cpuWaitList.size(); 1648 for (ThreadID tid = 0; tid < size; tid++) { 1649 activateWhenReady(tid); 1650 } 1651 1652 if (cpuWaitList.size() == 0) 1653 contextSwitch = true; 1654 } 1655} 1656 1657template <class Impl> 1658void 1659FullO3CPU<Impl>::updateThreadPriority() 1660{ 1661 if (activeThreads.size() > 1) { 1662 //DEFAULT TO ROUND ROBIN SCHEME 1663 //e.g. Move highest priority to end of thread list 1664 list<ThreadID>::iterator list_begin = activeThreads.begin(); 1665 list<ThreadID>::iterator list_end = activeThreads.end(); 1666 1667 unsigned high_thread = *list_begin; 1668 1669 activeThreads.erase(list_begin); 1670 1671 activeThreads.push_back(high_thread); 1672 } 1673} 1674 1675// Forward declaration of FullO3CPU. 1676template class FullO3CPU<O3CPUImpl>;
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