cpu.hh revision 8887:20ea02da9c53
1/* 2 * Copyright (c) 2011 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2004-2005 The Regents of The University of Michigan 15 * Copyright (c) 2011 Regents of the University of California 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Kevin Lim 42 * Korey Sewell 43 * Rick Strong 44 */ 45 46#ifndef __CPU_O3_CPU_HH__ 47#define __CPU_O3_CPU_HH__ 48 49#include <iostream> 50#include <list> 51#include <queue> 52#include <set> 53#include <vector> 54 55#include "arch/types.hh" 56#include "base/statistics.hh" 57#include "config/the_isa.hh" 58#include "cpu/o3/comm.hh" 59#include "cpu/o3/cpu_policy.hh" 60#include "cpu/o3/scoreboard.hh" 61#include "cpu/o3/thread_state.hh" 62#include "cpu/activity.hh" 63#include "cpu/base.hh" 64#include "cpu/simple_thread.hh" 65#include "cpu/timebuf.hh" 66//#include "cpu/o3/thread_context.hh" 67#include "params/DerivO3CPU.hh" 68#include "sim/process.hh" 69 70template <class> 71class Checker; 72class ThreadContext; 73template <class> 74class O3ThreadContext; 75 76class Checkpoint; 77class MemObject; 78class Process; 79 80struct BaseCPUParams; 81 82class BaseO3CPU : public BaseCPU 83{ 84 //Stuff that's pretty ISA independent will go here. 85 public: 86 BaseO3CPU(BaseCPUParams *params); 87 88 void regStats(); 89}; 90 91/** 92 * FullO3CPU class, has each of the stages (fetch through commit) 93 * within it, as well as all of the time buffers between stages. The 94 * tick() function for the CPU is defined here. 95 */ 96template <class Impl> 97class FullO3CPU : public BaseO3CPU 98{ 99 public: 100 // Typedefs from the Impl here. 101 typedef typename Impl::CPUPol CPUPolicy; 102 typedef typename Impl::DynInstPtr DynInstPtr; 103 typedef typename Impl::O3CPU O3CPU; 104 105 typedef O3ThreadState<Impl> ImplState; 106 typedef O3ThreadState<Impl> Thread; 107 108 typedef typename std::list<DynInstPtr>::iterator ListIt; 109 110 friend class O3ThreadContext<Impl>; 111 112 public: 113 enum Status { 114 Running, 115 Idle, 116 Halted, 117 Blocked, 118 SwitchedOut 119 }; 120 121 TheISA::TLB * itb; 122 TheISA::TLB * dtb; 123 124 /** Overall CPU status. */ 125 Status _status; 126 127 /** Per-thread status in CPU, used for SMT. */ 128 Status _threadStatus[Impl::MaxThreads]; 129 130 private: 131 132 /** 133 * IcachePort class for instruction fetch. 134 */ 135 class IcachePort : public CpuPort 136 { 137 protected: 138 /** Pointer to fetch. */ 139 DefaultFetch<Impl> *fetch; 140 141 public: 142 /** Default constructor. */ 143 IcachePort(DefaultFetch<Impl> *_fetch, FullO3CPU<Impl>* _cpu) 144 : CpuPort(_fetch->name() + "-iport", _cpu), fetch(_fetch) 145 { } 146 147 protected: 148 149 /** Timing version of receive. Handles setting fetch to the 150 * proper status to start fetching. */ 151 virtual bool recvTiming(PacketPtr pkt); 152 153 /** Handles doing a retry of a failed fetch. */ 154 virtual void recvRetry(); 155 }; 156 157 /** 158 * DcachePort class for the load/store queue. 159 */ 160 class DcachePort : public CpuPort 161 { 162 protected: 163 164 /** Pointer to LSQ. */ 165 LSQ<Impl> *lsq; 166 167 public: 168 /** Default constructor. */ 169 DcachePort(LSQ<Impl> *_lsq, FullO3CPU<Impl>* _cpu) 170 : CpuPort(_lsq->name() + "-dport", _cpu), lsq(_lsq) 171 { } 172 173 protected: 174 175 /** Timing version of receive. Handles writing back and 176 * completing the load or store that has returned from 177 * memory. */ 178 virtual bool recvTiming(PacketPtr pkt); 179 180 /** Handles doing a retry of the previous send. */ 181 virtual void recvRetry(); 182 183 /** 184 * As this CPU requires snooping to maintain the load store queue 185 * change the behaviour from the base CPU port. 186 * 187 * @return true since we have to snoop 188 */ 189 virtual bool isSnooping() 190 { return true; } 191 }; 192 193 class TickEvent : public Event 194 { 195 private: 196 /** Pointer to the CPU. */ 197 FullO3CPU<Impl> *cpu; 198 199 public: 200 /** Constructs a tick event. */ 201 TickEvent(FullO3CPU<Impl> *c); 202 203 /** Processes a tick event, calling tick() on the CPU. */ 204 void process(); 205 /** Returns the description of the tick event. */ 206 const char *description() const; 207 }; 208 209 /** The tick event used for scheduling CPU ticks. */ 210 TickEvent tickEvent; 211 212 /** Schedule tick event, regardless of its current state. */ 213 void scheduleTickEvent(int delay) 214 { 215 if (tickEvent.squashed()) 216 reschedule(tickEvent, nextCycle(curTick() + ticks(delay))); 217 else if (!tickEvent.scheduled()) 218 schedule(tickEvent, nextCycle(curTick() + ticks(delay))); 219 } 220 221 /** Unschedule tick event, regardless of its current state. */ 222 void unscheduleTickEvent() 223 { 224 if (tickEvent.scheduled()) 225 tickEvent.squash(); 226 } 227 228 class ActivateThreadEvent : public Event 229 { 230 private: 231 /** Number of Thread to Activate */ 232 ThreadID tid; 233 234 /** Pointer to the CPU. */ 235 FullO3CPU<Impl> *cpu; 236 237 public: 238 /** Constructs the event. */ 239 ActivateThreadEvent(); 240 241 /** Initialize Event */ 242 void init(int thread_num, FullO3CPU<Impl> *thread_cpu); 243 244 /** Processes the event, calling activateThread() on the CPU. */ 245 void process(); 246 247 /** Returns the description of the event. */ 248 const char *description() const; 249 }; 250 251 /** Schedule thread to activate , regardless of its current state. */ 252 void 253 scheduleActivateThreadEvent(ThreadID tid, int delay) 254 { 255 // Schedule thread to activate, regardless of its current state. 256 if (activateThreadEvent[tid].squashed()) 257 reschedule(activateThreadEvent[tid], 258 nextCycle(curTick() + ticks(delay))); 259 else if (!activateThreadEvent[tid].scheduled()) { 260 Tick when = nextCycle(curTick() + ticks(delay)); 261 262 // Check if the deallocateEvent is also scheduled, and make 263 // sure they do not happen at same time causing a sleep that 264 // is never woken from. 265 if (deallocateContextEvent[tid].scheduled() && 266 deallocateContextEvent[tid].when() == when) { 267 when++; 268 } 269 270 schedule(activateThreadEvent[tid], when); 271 } 272 } 273 274 /** Unschedule actiavte thread event, regardless of its current state. */ 275 void 276 unscheduleActivateThreadEvent(ThreadID tid) 277 { 278 if (activateThreadEvent[tid].scheduled()) 279 activateThreadEvent[tid].squash(); 280 } 281 282 /** The tick event used for scheduling CPU ticks. */ 283 ActivateThreadEvent activateThreadEvent[Impl::MaxThreads]; 284 285 class DeallocateContextEvent : public Event 286 { 287 private: 288 /** Number of Thread to deactivate */ 289 ThreadID tid; 290 291 /** Should the thread be removed from the CPU? */ 292 bool remove; 293 294 /** Pointer to the CPU. */ 295 FullO3CPU<Impl> *cpu; 296 297 public: 298 /** Constructs the event. */ 299 DeallocateContextEvent(); 300 301 /** Initialize Event */ 302 void init(int thread_num, FullO3CPU<Impl> *thread_cpu); 303 304 /** Processes the event, calling activateThread() on the CPU. */ 305 void process(); 306 307 /** Sets whether the thread should also be removed from the CPU. */ 308 void setRemove(bool _remove) { remove = _remove; } 309 310 /** Returns the description of the event. */ 311 const char *description() const; 312 }; 313 314 /** Schedule cpu to deallocate thread context.*/ 315 void 316 scheduleDeallocateContextEvent(ThreadID tid, bool remove, int delay) 317 { 318 // Schedule thread to activate, regardless of its current state. 319 if (deallocateContextEvent[tid].squashed()) 320 reschedule(deallocateContextEvent[tid], 321 nextCycle(curTick() + ticks(delay))); 322 else if (!deallocateContextEvent[tid].scheduled()) 323 schedule(deallocateContextEvent[tid], 324 nextCycle(curTick() + ticks(delay))); 325 } 326 327 /** Unschedule thread deallocation in CPU */ 328 void 329 unscheduleDeallocateContextEvent(ThreadID tid) 330 { 331 if (deallocateContextEvent[tid].scheduled()) 332 deallocateContextEvent[tid].squash(); 333 } 334 335 /** The tick event used for scheduling CPU ticks. */ 336 DeallocateContextEvent deallocateContextEvent[Impl::MaxThreads]; 337 338 public: 339 /** Constructs a CPU with the given parameters. */ 340 FullO3CPU(DerivO3CPUParams *params); 341 /** Destructor. */ 342 ~FullO3CPU(); 343 344 /** Registers statistics. */ 345 void regStats(); 346 347 void demapPage(Addr vaddr, uint64_t asn) 348 { 349 this->itb->demapPage(vaddr, asn); 350 this->dtb->demapPage(vaddr, asn); 351 } 352 353 void demapInstPage(Addr vaddr, uint64_t asn) 354 { 355 this->itb->demapPage(vaddr, asn); 356 } 357 358 void demapDataPage(Addr vaddr, uint64_t asn) 359 { 360 this->dtb->demapPage(vaddr, asn); 361 } 362 363 /** Ticks CPU, calling tick() on each stage, and checking the overall 364 * activity to see if the CPU should deschedule itself. 365 */ 366 void tick(); 367 368 /** Initialize the CPU */ 369 void init(); 370 371 /** Returns the Number of Active Threads in the CPU */ 372 int numActiveThreads() 373 { return activeThreads.size(); } 374 375 /** Add Thread to Active Threads List */ 376 void activateThread(ThreadID tid); 377 378 /** Remove Thread from Active Threads List */ 379 void deactivateThread(ThreadID tid); 380 381 /** Setup CPU to insert a thread's context */ 382 void insertThread(ThreadID tid); 383 384 /** Remove all of a thread's context from CPU */ 385 void removeThread(ThreadID tid); 386 387 /** Count the Total Instructions Committed in the CPU. */ 388 virtual Counter totalInsts() const; 389 390 /** Count the Total Ops (including micro ops) committed in the CPU. */ 391 virtual Counter totalOps() const; 392 393 /** Add Thread to Active Threads List. */ 394 void activateContext(ThreadID tid, int delay); 395 396 /** Remove Thread from Active Threads List */ 397 void suspendContext(ThreadID tid); 398 399 /** Remove Thread from Active Threads List && 400 * Possibly Remove Thread Context from CPU. 401 */ 402 bool scheduleDeallocateContext(ThreadID tid, bool remove, int delay = 1); 403 404 /** Remove Thread from Active Threads List && 405 * Remove Thread Context from CPU. 406 */ 407 void haltContext(ThreadID tid); 408 409 /** Activate a Thread When CPU Resources are Available. */ 410 void activateWhenReady(ThreadID tid); 411 412 /** Add or Remove a Thread Context in the CPU. */ 413 void doContextSwitch(); 414 415 /** Update The Order In Which We Process Threads. */ 416 void updateThreadPriority(); 417 418 /** Serialize state. */ 419 virtual void serialize(std::ostream &os); 420 421 /** Unserialize from a checkpoint. */ 422 virtual void unserialize(Checkpoint *cp, const std::string §ion); 423 424 public: 425 /** Executes a syscall. 426 * @todo: Determine if this needs to be virtual. 427 */ 428 void syscall(int64_t callnum, ThreadID tid); 429 430 /** Starts draining the CPU's pipeline of all instructions in 431 * order to stop all memory accesses. */ 432 virtual unsigned int drain(Event *drain_event); 433 434 /** Resumes execution after a drain. */ 435 virtual void resume(); 436 437 /** Signals to this CPU that a stage has completed switching out. */ 438 void signalDrained(); 439 440 /** Switches out this CPU. */ 441 virtual void switchOut(); 442 443 /** Takes over from another CPU. */ 444 virtual void takeOverFrom(BaseCPU *oldCPU); 445 446 /** Get the current instruction sequence number, and increment it. */ 447 InstSeqNum getAndIncrementInstSeq() 448 { return globalSeqNum++; } 449 450 /** Traps to handle given fault. */ 451 void trap(Fault fault, ThreadID tid, StaticInstPtr inst); 452 453 /** HW return from error interrupt. */ 454 Fault hwrei(ThreadID tid); 455 456 bool simPalCheck(int palFunc, ThreadID tid); 457 458 /** Returns the Fault for any valid interrupt. */ 459 Fault getInterrupts(); 460 461 /** Processes any an interrupt fault. */ 462 void processInterrupts(Fault interrupt); 463 464 /** Halts the CPU. */ 465 void halt() { panic("Halt not implemented!\n"); } 466 467 /** Check if this address is a valid instruction address. */ 468 bool validInstAddr(Addr addr) { return true; } 469 470 /** Check if this address is a valid data address. */ 471 bool validDataAddr(Addr addr) { return true; } 472 473 /** Register accessors. Index refers to the physical register index. */ 474 475 /** Reads a miscellaneous register. */ 476 TheISA::MiscReg readMiscRegNoEffect(int misc_reg, ThreadID tid); 477 478 /** Reads a misc. register, including any side effects the read 479 * might have as defined by the architecture. 480 */ 481 TheISA::MiscReg readMiscReg(int misc_reg, ThreadID tid); 482 483 /** Sets a miscellaneous register. */ 484 void setMiscRegNoEffect(int misc_reg, const TheISA::MiscReg &val, 485 ThreadID tid); 486 487 /** Sets a misc. register, including any side effects the write 488 * might have as defined by the architecture. 489 */ 490 void setMiscReg(int misc_reg, const TheISA::MiscReg &val, 491 ThreadID tid); 492 493 uint64_t readIntReg(int reg_idx); 494 495 TheISA::FloatReg readFloatReg(int reg_idx); 496 497 TheISA::FloatRegBits readFloatRegBits(int reg_idx); 498 499 void setIntReg(int reg_idx, uint64_t val); 500 501 void setFloatReg(int reg_idx, TheISA::FloatReg val); 502 503 void setFloatRegBits(int reg_idx, TheISA::FloatRegBits val); 504 505 uint64_t readArchIntReg(int reg_idx, ThreadID tid); 506 507 float readArchFloatReg(int reg_idx, ThreadID tid); 508 509 uint64_t readArchFloatRegInt(int reg_idx, ThreadID tid); 510 511 /** Architectural register accessors. Looks up in the commit 512 * rename table to obtain the true physical index of the 513 * architected register first, then accesses that physical 514 * register. 515 */ 516 void setArchIntReg(int reg_idx, uint64_t val, ThreadID tid); 517 518 void setArchFloatReg(int reg_idx, float val, ThreadID tid); 519 520 void setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid); 521 522 /** Sets the commit PC state of a specific thread. */ 523 void pcState(const TheISA::PCState &newPCState, ThreadID tid); 524 525 /** Reads the commit PC state of a specific thread. */ 526 TheISA::PCState pcState(ThreadID tid); 527 528 /** Reads the commit PC of a specific thread. */ 529 Addr instAddr(ThreadID tid); 530 531 /** Reads the commit micro PC of a specific thread. */ 532 MicroPC microPC(ThreadID tid); 533 534 /** Reads the next PC of a specific thread. */ 535 Addr nextInstAddr(ThreadID tid); 536 537 /** Initiates a squash of all in-flight instructions for a given 538 * thread. The source of the squash is an external update of 539 * state through the TC. 540 */ 541 void squashFromTC(ThreadID tid); 542 543 /** Function to add instruction onto the head of the list of the 544 * instructions. Used when new instructions are fetched. 545 */ 546 ListIt addInst(DynInstPtr &inst); 547 548 /** Function to tell the CPU that an instruction has completed. */ 549 void instDone(ThreadID tid, DynInstPtr &inst); 550 551 /** Remove an instruction from the front end of the list. There's 552 * no restriction on location of the instruction. 553 */ 554 void removeFrontInst(DynInstPtr &inst); 555 556 /** Remove all instructions that are not currently in the ROB. 557 * There's also an option to not squash delay slot instructions.*/ 558 void removeInstsNotInROB(ThreadID tid); 559 560 /** Remove all instructions younger than the given sequence number. */ 561 void removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid); 562 563 /** Removes the instruction pointed to by the iterator. */ 564 inline void squashInstIt(const ListIt &instIt, ThreadID tid); 565 566 /** Cleans up all instructions on the remove list. */ 567 void cleanUpRemovedInsts(); 568 569 /** Debug function to print all instructions on the list. */ 570 void dumpInsts(); 571 572 public: 573#ifndef NDEBUG 574 /** Count of total number of dynamic instructions in flight. */ 575 int instcount; 576#endif 577 578 /** List of all the instructions in flight. */ 579 std::list<DynInstPtr> instList; 580 581 /** List of all the instructions that will be removed at the end of this 582 * cycle. 583 */ 584 std::queue<ListIt> removeList; 585 586#ifdef DEBUG 587 /** Debug structure to keep track of the sequence numbers still in 588 * flight. 589 */ 590 std::set<InstSeqNum> snList; 591#endif 592 593 /** Records if instructions need to be removed this cycle due to 594 * being retired or squashed. 595 */ 596 bool removeInstsThisCycle; 597 598 protected: 599 /** The fetch stage. */ 600 typename CPUPolicy::Fetch fetch; 601 602 /** The decode stage. */ 603 typename CPUPolicy::Decode decode; 604 605 /** The dispatch stage. */ 606 typename CPUPolicy::Rename rename; 607 608 /** The issue/execute/writeback stages. */ 609 typename CPUPolicy::IEW iew; 610 611 /** The commit stage. */ 612 typename CPUPolicy::Commit commit; 613 614 /** The register file. */ 615 typename CPUPolicy::RegFile regFile; 616 617 /** The free list. */ 618 typename CPUPolicy::FreeList freeList; 619 620 /** The rename map. */ 621 typename CPUPolicy::RenameMap renameMap[Impl::MaxThreads]; 622 623 /** The commit rename map. */ 624 typename CPUPolicy::RenameMap commitRenameMap[Impl::MaxThreads]; 625 626 /** The re-order buffer. */ 627 typename CPUPolicy::ROB rob; 628 629 /** Active Threads List */ 630 std::list<ThreadID> activeThreads; 631 632 /** Integer Register Scoreboard */ 633 Scoreboard scoreboard; 634 635 TheISA::ISA isa[Impl::MaxThreads]; 636 637 /** Instruction port. Note that it has to appear after the fetch stage. */ 638 IcachePort icachePort; 639 640 /** Data port. Note that it has to appear after the iew stages */ 641 DcachePort dcachePort; 642 643 public: 644 /** Enum to give each stage a specific index, so when calling 645 * activateStage() or deactivateStage(), they can specify which stage 646 * is being activated/deactivated. 647 */ 648 enum StageIdx { 649 FetchIdx, 650 DecodeIdx, 651 RenameIdx, 652 IEWIdx, 653 CommitIdx, 654 NumStages }; 655 656 /** Typedefs from the Impl to get the structs that each of the 657 * time buffers should use. 658 */ 659 typedef typename CPUPolicy::TimeStruct TimeStruct; 660 661 typedef typename CPUPolicy::FetchStruct FetchStruct; 662 663 typedef typename CPUPolicy::DecodeStruct DecodeStruct; 664 665 typedef typename CPUPolicy::RenameStruct RenameStruct; 666 667 typedef typename CPUPolicy::IEWStruct IEWStruct; 668 669 /** The main time buffer to do backwards communication. */ 670 TimeBuffer<TimeStruct> timeBuffer; 671 672 /** The fetch stage's instruction queue. */ 673 TimeBuffer<FetchStruct> fetchQueue; 674 675 /** The decode stage's instruction queue. */ 676 TimeBuffer<DecodeStruct> decodeQueue; 677 678 /** The rename stage's instruction queue. */ 679 TimeBuffer<RenameStruct> renameQueue; 680 681 /** The IEW stage's instruction queue. */ 682 TimeBuffer<IEWStruct> iewQueue; 683 684 private: 685 /** The activity recorder; used to tell if the CPU has any 686 * activity remaining or if it can go to idle and deschedule 687 * itself. 688 */ 689 ActivityRecorder activityRec; 690 691 public: 692 /** Records that there was time buffer activity this cycle. */ 693 void activityThisCycle() { activityRec.activity(); } 694 695 /** Changes a stage's status to active within the activity recorder. */ 696 void activateStage(const StageIdx idx) 697 { activityRec.activateStage(idx); } 698 699 /** Changes a stage's status to inactive within the activity recorder. */ 700 void deactivateStage(const StageIdx idx) 701 { activityRec.deactivateStage(idx); } 702 703 /** Wakes the CPU, rescheduling the CPU if it's not already active. */ 704 void wakeCPU(); 705 706 virtual void wakeup(); 707 708 /** Gets a free thread id. Use if thread ids change across system. */ 709 ThreadID getFreeTid(); 710 711 public: 712 /** Returns a pointer to a thread context. */ 713 ThreadContext * 714 tcBase(ThreadID tid) 715 { 716 return thread[tid]->getTC(); 717 } 718 719 /** The global sequence number counter. */ 720 InstSeqNum globalSeqNum;//[Impl::MaxThreads]; 721 722 /** Pointer to the checker, which can dynamically verify 723 * instruction results at run time. This can be set to NULL if it 724 * is not being used. 725 */ 726 Checker<Impl> *checker; 727 728 /** Pointer to the system. */ 729 System *system; 730 731 /** Event to call process() on once draining has completed. */ 732 Event *drainEvent; 733 734 /** Counter of how many stages have completed draining. */ 735 int drainCount; 736 737 /** Pointers to all of the threads in the CPU. */ 738 std::vector<Thread *> thread; 739 740 /** Whether or not the CPU should defer its registration. */ 741 bool deferRegistration; 742 743 /** Is there a context switch pending? */ 744 bool contextSwitch; 745 746 /** Threads Scheduled to Enter CPU */ 747 std::list<int> cpuWaitList; 748 749 /** The cycle that the CPU was last running, used for statistics. */ 750 Tick lastRunningCycle; 751 752 /** The cycle that the CPU was last activated by a new thread*/ 753 Tick lastActivatedCycle; 754 755 /** Mapping for system thread id to cpu id */ 756 std::map<ThreadID, unsigned> threadMap; 757 758 /** Available thread ids in the cpu*/ 759 std::vector<ThreadID> tids; 760 761 /** CPU read function, forwards read to LSQ. */ 762 Fault read(RequestPtr &req, RequestPtr &sreqLow, RequestPtr &sreqHigh, 763 uint8_t *data, int load_idx) 764 { 765 return this->iew.ldstQueue.read(req, sreqLow, sreqHigh, 766 data, load_idx); 767 } 768 769 /** CPU write function, forwards write to LSQ. */ 770 Fault write(RequestPtr &req, RequestPtr &sreqLow, RequestPtr &sreqHigh, 771 uint8_t *data, int store_idx) 772 { 773 return this->iew.ldstQueue.write(req, sreqLow, sreqHigh, 774 data, store_idx); 775 } 776 777 /** Used by the fetch unit to get a hold of the instruction port. */ 778 virtual CpuPort &getInstPort() { return icachePort; } 779 780 /** Get the dcache port (used to find block size for translations). */ 781 virtual CpuPort &getDataPort() { return dcachePort; } 782 783 Addr lockAddr; 784 785 /** Temporary fix for the lock flag, works in the UP case. */ 786 bool lockFlag; 787 788 /** Stat for total number of times the CPU is descheduled. */ 789 Stats::Scalar timesIdled; 790 /** Stat for total number of cycles the CPU spends descheduled. */ 791 Stats::Scalar idleCycles; 792 /** Stat for total number of cycles the CPU spends descheduled due to a 793 * quiesce operation or waiting for an interrupt. */ 794 Stats::Scalar quiesceCycles; 795 /** Stat for the number of committed instructions per thread. */ 796 Stats::Vector committedInsts; 797 /** Stat for the number of committed ops (including micro ops) per thread. */ 798 Stats::Vector committedOps; 799 /** Stat for the total number of committed instructions. */ 800 Stats::Scalar totalCommittedInsts; 801 /** Stat for the CPI per thread. */ 802 Stats::Formula cpi; 803 /** Stat for the total CPI. */ 804 Stats::Formula totalCpi; 805 /** Stat for the IPC per thread. */ 806 Stats::Formula ipc; 807 /** Stat for the total IPC. */ 808 Stats::Formula totalIpc; 809 810 //number of integer register file accesses 811 Stats::Scalar intRegfileReads; 812 Stats::Scalar intRegfileWrites; 813 //number of float register file accesses 814 Stats::Scalar fpRegfileReads; 815 Stats::Scalar fpRegfileWrites; 816 //number of misc 817 Stats::Scalar miscRegfileReads; 818 Stats::Scalar miscRegfileWrites; 819}; 820 821#endif // __CPU_O3_CPU_HH__ 822