cpu.hh revision 10408:a59c189de383
1/* 2 * Copyright (c) 2011-2013 ARM Limited 3 * Copyright (c) 2013 Advanced Micro Devices, Inc. 4 * All rights reserved 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license 11 * terms below provided that you ensure that this notice is replicated 12 * unmodified and in its entirety in all distributions of the software, 13 * modified or unmodified, in source code or in binary form. 14 * 15 * Copyright (c) 2004-2005 The Regents of The University of Michigan 16 * Copyright (c) 2011 Regents of the University of California 17 * All rights reserved. 18 * 19 * Redistribution and use in source and binary forms, with or without 20 * modification, are permitted provided that the following conditions are 21 * met: redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer; 23 * redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution; 26 * neither the name of the copyright holders nor the names of its 27 * contributors may be used to endorse or promote products derived from 28 * this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 31 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 33 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 34 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 35 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 36 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 40 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 * 42 * Authors: Kevin Lim 43 * Korey Sewell 44 * Rick Strong 45 */ 46 47#ifndef __CPU_O3_CPU_HH__ 48#define __CPU_O3_CPU_HH__ 49 50#include <iostream> 51#include <list> 52#include <queue> 53#include <set> 54#include <vector> 55 56#include "arch/types.hh" 57#include "base/statistics.hh" 58#include "config/the_isa.hh" 59#include "cpu/o3/comm.hh" 60#include "cpu/o3/cpu_policy.hh" 61#include "cpu/o3/scoreboard.hh" 62#include "cpu/o3/thread_state.hh" 63#include "cpu/activity.hh" 64#include "cpu/base.hh" 65#include "cpu/simple_thread.hh" 66#include "cpu/timebuf.hh" 67//#include "cpu/o3/thread_context.hh" 68#include "params/DerivO3CPU.hh" 69#include "sim/process.hh" 70 71template <class> 72class Checker; 73class ThreadContext; 74template <class> 75class O3ThreadContext; 76 77class Checkpoint; 78class MemObject; 79class Process; 80 81struct BaseCPUParams; 82 83class BaseO3CPU : public BaseCPU 84{ 85 //Stuff that's pretty ISA independent will go here. 86 public: 87 BaseO3CPU(BaseCPUParams *params); 88 89 void regStats(); 90}; 91 92/** 93 * FullO3CPU class, has each of the stages (fetch through commit) 94 * within it, as well as all of the time buffers between stages. The 95 * tick() function for the CPU is defined here. 96 */ 97template <class Impl> 98class FullO3CPU : public BaseO3CPU 99{ 100 public: 101 // Typedefs from the Impl here. 102 typedef typename Impl::CPUPol CPUPolicy; 103 typedef typename Impl::DynInstPtr DynInstPtr; 104 typedef typename Impl::O3CPU O3CPU; 105 106 typedef O3ThreadState<Impl> ImplState; 107 typedef O3ThreadState<Impl> Thread; 108 109 typedef typename std::list<DynInstPtr>::iterator ListIt; 110 111 friend class O3ThreadContext<Impl>; 112 113 public: 114 enum Status { 115 Running, 116 Idle, 117 Halted, 118 Blocked, 119 SwitchedOut 120 }; 121 122 TheISA::TLB * itb; 123 TheISA::TLB * dtb; 124 125 /** Overall CPU status. */ 126 Status _status; 127 128 private: 129 130 /** 131 * IcachePort class for instruction fetch. 132 */ 133 class IcachePort : public MasterPort 134 { 135 protected: 136 /** Pointer to fetch. */ 137 DefaultFetch<Impl> *fetch; 138 139 public: 140 /** Default constructor. */ 141 IcachePort(DefaultFetch<Impl> *_fetch, FullO3CPU<Impl>* _cpu) 142 : MasterPort(_cpu->name() + ".icache_port", _cpu), fetch(_fetch) 143 { } 144 145 protected: 146 147 /** Timing version of receive. Handles setting fetch to the 148 * proper status to start fetching. */ 149 virtual bool recvTimingResp(PacketPtr pkt); 150 virtual void recvTimingSnoopReq(PacketPtr pkt) { } 151 152 /** Handles doing a retry of a failed fetch. */ 153 virtual void recvRetry(); 154 }; 155 156 /** 157 * DcachePort class for the load/store queue. 158 */ 159 class DcachePort : public MasterPort 160 { 161 protected: 162 163 /** Pointer to LSQ. */ 164 LSQ<Impl> *lsq; 165 166 public: 167 /** Default constructor. */ 168 DcachePort(LSQ<Impl> *_lsq, FullO3CPU<Impl>* _cpu) 169 : MasterPort(_cpu->name() + ".dcache_port", _cpu), lsq(_lsq) 170 { } 171 172 protected: 173 174 /** Timing version of receive. Handles writing back and 175 * completing the load or store that has returned from 176 * memory. */ 177 virtual bool recvTimingResp(PacketPtr pkt); 178 virtual void recvTimingSnoopReq(PacketPtr pkt); 179 180 virtual void recvFunctionalSnoop(PacketPtr pkt) 181 { 182 // @todo: Is there a need for potential invalidation here? 183 } 184 185 /** Handles doing a retry of the previous send. */ 186 virtual void recvRetry(); 187 188 /** 189 * As this CPU requires snooping to maintain the load store queue 190 * change the behaviour from the base CPU port. 191 * 192 * @return true since we have to snoop 193 */ 194 virtual bool isSnooping() const { return true; } 195 }; 196 197 class TickEvent : public Event 198 { 199 private: 200 /** Pointer to the CPU. */ 201 FullO3CPU<Impl> *cpu; 202 203 public: 204 /** Constructs a tick event. */ 205 TickEvent(FullO3CPU<Impl> *c); 206 207 /** Processes a tick event, calling tick() on the CPU. */ 208 void process(); 209 /** Returns the description of the tick event. */ 210 const char *description() const; 211 }; 212 213 /** The tick event used for scheduling CPU ticks. */ 214 TickEvent tickEvent; 215 216 /** Schedule tick event, regardless of its current state. */ 217 void scheduleTickEvent(Cycles delay) 218 { 219 if (tickEvent.squashed()) 220 reschedule(tickEvent, clockEdge(delay)); 221 else if (!tickEvent.scheduled()) 222 schedule(tickEvent, clockEdge(delay)); 223 } 224 225 /** Unschedule tick event, regardless of its current state. */ 226 void unscheduleTickEvent() 227 { 228 if (tickEvent.scheduled()) 229 tickEvent.squash(); 230 } 231 232 /** 233 * Check if the pipeline has drained and signal the DrainManager. 234 * 235 * This method checks if a drain has been requested and if the CPU 236 * has drained successfully (i.e., there are no instructions in 237 * the pipeline). If the CPU has drained, it deschedules the tick 238 * event and signals the drain manager. 239 * 240 * @return False if a drain hasn't been requested or the CPU 241 * hasn't drained, true otherwise. 242 */ 243 bool tryDrain(); 244 245 /** 246 * Perform sanity checks after a drain. 247 * 248 * This method is called from drain() when it has determined that 249 * the CPU is fully drained when gem5 is compiled with the NDEBUG 250 * macro undefined. The intention of this method is to do more 251 * extensive tests than the isDrained() method to weed out any 252 * draining bugs. 253 */ 254 void drainSanityCheck() const; 255 256 /** Check if a system is in a drained state. */ 257 bool isDrained() const; 258 259 public: 260 /** Constructs a CPU with the given parameters. */ 261 FullO3CPU(DerivO3CPUParams *params); 262 /** Destructor. */ 263 ~FullO3CPU(); 264 265 /** Registers statistics. */ 266 void regStats(); 267 268 ProbePointArg<PacketPtr> *ppInstAccessComplete; 269 ProbePointArg<std::pair<DynInstPtr, PacketPtr> > *ppDataAccessComplete; 270 271 /** Register probe points. */ 272 void regProbePoints(); 273 274 void demapPage(Addr vaddr, uint64_t asn) 275 { 276 this->itb->demapPage(vaddr, asn); 277 this->dtb->demapPage(vaddr, asn); 278 } 279 280 void demapInstPage(Addr vaddr, uint64_t asn) 281 { 282 this->itb->demapPage(vaddr, asn); 283 } 284 285 void demapDataPage(Addr vaddr, uint64_t asn) 286 { 287 this->dtb->demapPage(vaddr, asn); 288 } 289 290 /** Ticks CPU, calling tick() on each stage, and checking the overall 291 * activity to see if the CPU should deschedule itself. 292 */ 293 void tick(); 294 295 /** Initialize the CPU */ 296 void init(); 297 298 void startup(); 299 300 /** Returns the Number of Active Threads in the CPU */ 301 int numActiveThreads() 302 { return activeThreads.size(); } 303 304 /** Add Thread to Active Threads List */ 305 void activateThread(ThreadID tid); 306 307 /** Remove Thread from Active Threads List */ 308 void deactivateThread(ThreadID tid); 309 310 /** Setup CPU to insert a thread's context */ 311 void insertThread(ThreadID tid); 312 313 /** Remove all of a thread's context from CPU */ 314 void removeThread(ThreadID tid); 315 316 /** Count the Total Instructions Committed in the CPU. */ 317 virtual Counter totalInsts() const; 318 319 /** Count the Total Ops (including micro ops) committed in the CPU. */ 320 virtual Counter totalOps() const; 321 322 /** Add Thread to Active Threads List. */ 323 void activateContext(ThreadID tid); 324 325 /** Remove Thread from Active Threads List */ 326 void suspendContext(ThreadID tid); 327 328 /** Remove Thread from Active Threads List && 329 * Remove Thread Context from CPU. 330 */ 331 void haltContext(ThreadID tid); 332 333 /** Update The Order In Which We Process Threads. */ 334 void updateThreadPriority(); 335 336 /** Is the CPU draining? */ 337 bool isDraining() const { return getDrainState() == Drainable::Draining; } 338 339 void serializeThread(std::ostream &os, ThreadID tid); 340 341 void unserializeThread(Checkpoint *cp, const std::string §ion, 342 ThreadID tid); 343 344 public: 345 /** Executes a syscall. 346 * @todo: Determine if this needs to be virtual. 347 */ 348 void syscall(int64_t callnum, ThreadID tid); 349 350 /** Starts draining the CPU's pipeline of all instructions in 351 * order to stop all memory accesses. */ 352 unsigned int drain(DrainManager *drain_manager); 353 354 /** Resumes execution after a drain. */ 355 void drainResume(); 356 357 /** 358 * Commit has reached a safe point to drain a thread. 359 * 360 * Commit calls this method to inform the pipeline that it has 361 * reached a point where it is not executed microcode and is about 362 * to squash uncommitted instructions to fully drain the pipeline. 363 */ 364 void commitDrained(ThreadID tid); 365 366 /** Switches out this CPU. */ 367 virtual void switchOut(); 368 369 /** Takes over from another CPU. */ 370 virtual void takeOverFrom(BaseCPU *oldCPU); 371 372 void verifyMemoryMode() const; 373 374 /** Get the current instruction sequence number, and increment it. */ 375 InstSeqNum getAndIncrementInstSeq() 376 { return globalSeqNum++; } 377 378 /** Traps to handle given fault. */ 379 void trap(const Fault &fault, ThreadID tid, StaticInstPtr inst); 380 381 /** HW return from error interrupt. */ 382 Fault hwrei(ThreadID tid); 383 384 bool simPalCheck(int palFunc, ThreadID tid); 385 386 /** Returns the Fault for any valid interrupt. */ 387 Fault getInterrupts(); 388 389 /** Processes any an interrupt fault. */ 390 void processInterrupts(const Fault &interrupt); 391 392 /** Halts the CPU. */ 393 void halt() { panic("Halt not implemented!\n"); } 394 395 /** Check if this address is a valid instruction address. */ 396 bool validInstAddr(Addr addr) { return true; } 397 398 /** Check if this address is a valid data address. */ 399 bool validDataAddr(Addr addr) { return true; } 400 401 /** Register accessors. Index refers to the physical register index. */ 402 403 /** Reads a miscellaneous register. */ 404 TheISA::MiscReg readMiscRegNoEffect(int misc_reg, ThreadID tid); 405 406 /** Reads a misc. register, including any side effects the read 407 * might have as defined by the architecture. 408 */ 409 TheISA::MiscReg readMiscReg(int misc_reg, ThreadID tid); 410 411 /** Sets a miscellaneous register. */ 412 void setMiscRegNoEffect(int misc_reg, const TheISA::MiscReg &val, 413 ThreadID tid); 414 415 /** Sets a misc. register, including any side effects the write 416 * might have as defined by the architecture. 417 */ 418 void setMiscReg(int misc_reg, const TheISA::MiscReg &val, 419 ThreadID tid); 420 421 uint64_t readIntReg(int reg_idx); 422 423 TheISA::FloatReg readFloatReg(int reg_idx); 424 425 TheISA::FloatRegBits readFloatRegBits(int reg_idx); 426 427 TheISA::CCReg readCCReg(int reg_idx); 428 429 void setIntReg(int reg_idx, uint64_t val); 430 431 void setFloatReg(int reg_idx, TheISA::FloatReg val); 432 433 void setFloatRegBits(int reg_idx, TheISA::FloatRegBits val); 434 435 void setCCReg(int reg_idx, TheISA::CCReg val); 436 437 uint64_t readArchIntReg(int reg_idx, ThreadID tid); 438 439 float readArchFloatReg(int reg_idx, ThreadID tid); 440 441 uint64_t readArchFloatRegInt(int reg_idx, ThreadID tid); 442 443 TheISA::CCReg readArchCCReg(int reg_idx, ThreadID tid); 444 445 /** Architectural register accessors. Looks up in the commit 446 * rename table to obtain the true physical index of the 447 * architected register first, then accesses that physical 448 * register. 449 */ 450 void setArchIntReg(int reg_idx, uint64_t val, ThreadID tid); 451 452 void setArchFloatReg(int reg_idx, float val, ThreadID tid); 453 454 void setArchFloatRegInt(int reg_idx, uint64_t val, ThreadID tid); 455 456 void setArchCCReg(int reg_idx, TheISA::CCReg val, ThreadID tid); 457 458 /** Sets the commit PC state of a specific thread. */ 459 void pcState(const TheISA::PCState &newPCState, ThreadID tid); 460 461 /** Reads the commit PC state of a specific thread. */ 462 TheISA::PCState pcState(ThreadID tid); 463 464 /** Reads the commit PC of a specific thread. */ 465 Addr instAddr(ThreadID tid); 466 467 /** Reads the commit micro PC of a specific thread. */ 468 MicroPC microPC(ThreadID tid); 469 470 /** Reads the next PC of a specific thread. */ 471 Addr nextInstAddr(ThreadID tid); 472 473 /** Initiates a squash of all in-flight instructions for a given 474 * thread. The source of the squash is an external update of 475 * state through the TC. 476 */ 477 void squashFromTC(ThreadID tid); 478 479 /** Function to add instruction onto the head of the list of the 480 * instructions. Used when new instructions are fetched. 481 */ 482 ListIt addInst(DynInstPtr &inst); 483 484 /** Function to tell the CPU that an instruction has completed. */ 485 void instDone(ThreadID tid, DynInstPtr &inst); 486 487 /** Remove an instruction from the front end of the list. There's 488 * no restriction on location of the instruction. 489 */ 490 void removeFrontInst(DynInstPtr &inst); 491 492 /** Remove all instructions that are not currently in the ROB. 493 * There's also an option to not squash delay slot instructions.*/ 494 void removeInstsNotInROB(ThreadID tid); 495 496 /** Remove all instructions younger than the given sequence number. */ 497 void removeInstsUntil(const InstSeqNum &seq_num, ThreadID tid); 498 499 /** Removes the instruction pointed to by the iterator. */ 500 inline void squashInstIt(const ListIt &instIt, ThreadID tid); 501 502 /** Cleans up all instructions on the remove list. */ 503 void cleanUpRemovedInsts(); 504 505 /** Debug function to print all instructions on the list. */ 506 void dumpInsts(); 507 508 public: 509#ifndef NDEBUG 510 /** Count of total number of dynamic instructions in flight. */ 511 int instcount; 512#endif 513 514 /** List of all the instructions in flight. */ 515 std::list<DynInstPtr> instList; 516 517 /** List of all the instructions that will be removed at the end of this 518 * cycle. 519 */ 520 std::queue<ListIt> removeList; 521 522#ifdef DEBUG 523 /** Debug structure to keep track of the sequence numbers still in 524 * flight. 525 */ 526 std::set<InstSeqNum> snList; 527#endif 528 529 /** Records if instructions need to be removed this cycle due to 530 * being retired or squashed. 531 */ 532 bool removeInstsThisCycle; 533 534 protected: 535 /** The fetch stage. */ 536 typename CPUPolicy::Fetch fetch; 537 538 /** The decode stage. */ 539 typename CPUPolicy::Decode decode; 540 541 /** The dispatch stage. */ 542 typename CPUPolicy::Rename rename; 543 544 /** The issue/execute/writeback stages. */ 545 typename CPUPolicy::IEW iew; 546 547 /** The commit stage. */ 548 typename CPUPolicy::Commit commit; 549 550 /** The register file. */ 551 PhysRegFile regFile; 552 553 /** The free list. */ 554 typename CPUPolicy::FreeList freeList; 555 556 /** The rename map. */ 557 typename CPUPolicy::RenameMap renameMap[Impl::MaxThreads]; 558 559 /** The commit rename map. */ 560 typename CPUPolicy::RenameMap commitRenameMap[Impl::MaxThreads]; 561 562 /** The re-order buffer. */ 563 typename CPUPolicy::ROB rob; 564 565 /** Active Threads List */ 566 std::list<ThreadID> activeThreads; 567 568 /** Integer Register Scoreboard */ 569 Scoreboard scoreboard; 570 571 std::vector<TheISA::ISA *> isa; 572 573 /** Instruction port. Note that it has to appear after the fetch stage. */ 574 IcachePort icachePort; 575 576 /** Data port. Note that it has to appear after the iew stages */ 577 DcachePort dcachePort; 578 579 public: 580 /** Enum to give each stage a specific index, so when calling 581 * activateStage() or deactivateStage(), they can specify which stage 582 * is being activated/deactivated. 583 */ 584 enum StageIdx { 585 FetchIdx, 586 DecodeIdx, 587 RenameIdx, 588 IEWIdx, 589 CommitIdx, 590 NumStages }; 591 592 /** Typedefs from the Impl to get the structs that each of the 593 * time buffers should use. 594 */ 595 typedef typename CPUPolicy::TimeStruct TimeStruct; 596 597 typedef typename CPUPolicy::FetchStruct FetchStruct; 598 599 typedef typename CPUPolicy::DecodeStruct DecodeStruct; 600 601 typedef typename CPUPolicy::RenameStruct RenameStruct; 602 603 typedef typename CPUPolicy::IEWStruct IEWStruct; 604 605 /** The main time buffer to do backwards communication. */ 606 TimeBuffer<TimeStruct> timeBuffer; 607 608 /** The fetch stage's instruction queue. */ 609 TimeBuffer<FetchStruct> fetchQueue; 610 611 /** The decode stage's instruction queue. */ 612 TimeBuffer<DecodeStruct> decodeQueue; 613 614 /** The rename stage's instruction queue. */ 615 TimeBuffer<RenameStruct> renameQueue; 616 617 /** The IEW stage's instruction queue. */ 618 TimeBuffer<IEWStruct> iewQueue; 619 620 private: 621 /** The activity recorder; used to tell if the CPU has any 622 * activity remaining or if it can go to idle and deschedule 623 * itself. 624 */ 625 ActivityRecorder activityRec; 626 627 public: 628 /** Records that there was time buffer activity this cycle. */ 629 void activityThisCycle() { activityRec.activity(); } 630 631 /** Changes a stage's status to active within the activity recorder. */ 632 void activateStage(const StageIdx idx) 633 { activityRec.activateStage(idx); } 634 635 /** Changes a stage's status to inactive within the activity recorder. */ 636 void deactivateStage(const StageIdx idx) 637 { activityRec.deactivateStage(idx); } 638 639 /** Wakes the CPU, rescheduling the CPU if it's not already active. */ 640 void wakeCPU(); 641 642 virtual void wakeup(); 643 644 /** Gets a free thread id. Use if thread ids change across system. */ 645 ThreadID getFreeTid(); 646 647 public: 648 /** Returns a pointer to a thread context. */ 649 ThreadContext * 650 tcBase(ThreadID tid) 651 { 652 return thread[tid]->getTC(); 653 } 654 655 /** The global sequence number counter. */ 656 InstSeqNum globalSeqNum;//[Impl::MaxThreads]; 657 658 /** Pointer to the checker, which can dynamically verify 659 * instruction results at run time. This can be set to NULL if it 660 * is not being used. 661 */ 662 Checker<Impl> *checker; 663 664 /** Pointer to the system. */ 665 System *system; 666 667 /** DrainManager to notify when draining has completed. */ 668 DrainManager *drainManager; 669 670 /** Pointers to all of the threads in the CPU. */ 671 std::vector<Thread *> thread; 672 673 /** Threads Scheduled to Enter CPU */ 674 std::list<int> cpuWaitList; 675 676 /** The cycle that the CPU was last running, used for statistics. */ 677 Cycles lastRunningCycle; 678 679 /** The cycle that the CPU was last activated by a new thread*/ 680 Tick lastActivatedCycle; 681 682 /** Mapping for system thread id to cpu id */ 683 std::map<ThreadID, unsigned> threadMap; 684 685 /** Available thread ids in the cpu*/ 686 std::vector<ThreadID> tids; 687 688 /** CPU read function, forwards read to LSQ. */ 689 Fault read(RequestPtr &req, RequestPtr &sreqLow, RequestPtr &sreqHigh, 690 uint8_t *data, int load_idx) 691 { 692 return this->iew.ldstQueue.read(req, sreqLow, sreqHigh, 693 data, load_idx); 694 } 695 696 /** CPU write function, forwards write to LSQ. */ 697 Fault write(RequestPtr &req, RequestPtr &sreqLow, RequestPtr &sreqHigh, 698 uint8_t *data, int store_idx) 699 { 700 return this->iew.ldstQueue.write(req, sreqLow, sreqHigh, 701 data, store_idx); 702 } 703 704 /** Used by the fetch unit to get a hold of the instruction port. */ 705 virtual MasterPort &getInstPort() { return icachePort; } 706 707 /** Get the dcache port (used to find block size for translations). */ 708 virtual MasterPort &getDataPort() { return dcachePort; } 709 710 /** Stat for total number of times the CPU is descheduled. */ 711 Stats::Scalar timesIdled; 712 /** Stat for total number of cycles the CPU spends descheduled. */ 713 Stats::Scalar idleCycles; 714 /** Stat for total number of cycles the CPU spends descheduled due to a 715 * quiesce operation or waiting for an interrupt. */ 716 Stats::Scalar quiesceCycles; 717 /** Stat for the number of committed instructions per thread. */ 718 Stats::Vector committedInsts; 719 /** Stat for the number of committed ops (including micro ops) per thread. */ 720 Stats::Vector committedOps; 721 /** Stat for the CPI per thread. */ 722 Stats::Formula cpi; 723 /** Stat for the total CPI. */ 724 Stats::Formula totalCpi; 725 /** Stat for the IPC per thread. */ 726 Stats::Formula ipc; 727 /** Stat for the total IPC. */ 728 Stats::Formula totalIpc; 729 730 //number of integer register file accesses 731 Stats::Scalar intRegfileReads; 732 Stats::Scalar intRegfileWrites; 733 //number of float register file accesses 734 Stats::Scalar fpRegfileReads; 735 Stats::Scalar fpRegfileWrites; 736 //number of CC register file accesses 737 Stats::Scalar ccRegfileReads; 738 Stats::Scalar ccRegfileWrites; 739 //number of misc 740 Stats::Scalar miscRegfileReads; 741 Stats::Scalar miscRegfileWrites; 742}; 743 744#endif // __CPU_O3_CPU_HH__ 745