1/* 2 * Copyright (c) 2002-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 56 unchanged lines hidden (view full) --- 65#else // !FULL_SYSTEM 66#include "mem/mem_object.hh" 67#endif // FULL_SYSTEM 68 69using namespace std; 70using namespace TheISA; 71 72BaseSimpleCPU::BaseSimpleCPU(Params *p) |
73 : BaseCPU(p), traceData(NULL), thread(NULL), predecoder(NULL) |
74{ 75#if FULL_SYSTEM 76 thread = new SimpleThread(this, 0, p->system, p->itb, p->dtb); 77#else 78 thread = new SimpleThread(this, /* thread_num */ 0, p->process, 79 /* asid */ 0); 80#endif // !FULL_SYSTEM 81 --- 4 unchanged lines hidden (view full) --- 86 numInst = 0; 87 startNumInst = 0; 88 numLoad = 0; 89 startNumLoad = 0; 90 lastIcacheStall = 0; 91 lastDcacheStall = 0; 92 93 threadContexts.push_back(tc); |
94} 95 96BaseSimpleCPU::~BaseSimpleCPU() 97{ 98} 99 100void 101BaseSimpleCPU::deallocateContext(int thread_num) --- 219 unchanged lines hidden (view full) --- 321 } 322#endif 323} 324 325 326Fault 327BaseSimpleCPU::setupFetchRequest(Request *req) 328{ |
329 uint64_t threadPC = thread->readPC(); 330 |
331 // set up memory request for instruction fetch 332#if ISA_HAS_DELAY_SLOT |
333 DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p NNPC:%08p\n",threadPC, |
334 thread->readNextPC(),thread->readNextNPC()); 335#else |
336 DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p",threadPC, |
337 thread->readNextPC()); 338#endif 339 |
340 req->setVirt(0, threadPC & ~3, sizeof(MachInst), 341 (FULL_SYSTEM && (threadPC & 1)) ? PHYSICAL : 0, 342 threadPC); |
343 344 Fault fault = thread->translateInstReq(req); 345 346 return fault; 347} 348 349 350void --- 11 unchanged lines hidden (view full) --- 362 363 thread->funcExeInst++; 364 365 // check for instruction-count-based events 366 comInstEventQueue[0]->serviceEvents(numInst); 367 368 // decode the instruction 369 inst = gtoh(inst); |
370 //If we're not in the middle of a macro instruction 371 if (!curMacroStaticInst) { |
372 StaticInstPtr instPtr = NULL; 373 374 //Predecode, ie bundle up an ExtMachInst 375 //This should go away once the constructor can be set up properly 376 predecoder.setTC(thread->getTC()); 377 //If more fetch data is needed, pass it in. |
378 if(predecoder.needMoreBytes()) |
379 predecoder.moreBytes(thread->readPC(), 0, inst); |
380 else 381 predecoder.process(); |
382 //If an instruction is ready, decode it 383 if (predecoder.extMachInstReady()) |
384 instPtr = StaticInst::decode(predecoder.getExtMachInst()); |
385 386 //If we decoded an instruction and it's microcoded, start pulling 387 //out micro ops 388 if (instPtr && instPtr->isMacroOp()) { 389 curMacroStaticInst = instPtr; 390 curStaticInst = curMacroStaticInst-> 391 fetchMicroOp(thread->readMicroPC()); 392 } else { 393 curStaticInst = instPtr; 394 } 395 } else { 396 //Read the next micro op from the macro op 397 curStaticInst = curMacroStaticInst-> 398 fetchMicroOp(thread->readMicroPC()); 399 } 400 |
401#if TRACING_ON |
402 //If we decoded an instruction this "tick", record information about it. 403 if(curStaticInst) 404 { 405 traceData = Trace::getInstRecord(curTick, tc, curStaticInst, 406 thread->readPC()); 407 408 DPRINTF(Decode,"Decode: Decoded %s instruction: 0x%x\n", 409 curStaticInst->getName(), curStaticInst->machInst); 410 411#if FULL_SYSTEM 412 thread->setInst(inst); 413#endif // FULL_SYSTEM 414 } |
415#endif // TRACING_ON |
416} 417 418void 419BaseSimpleCPU::postExecute() 420{ 421#if FULL_SYSTEM 422 if (thread->profile) { 423 bool usermode = TheISA::inUserMode(tc); --- 22 unchanged lines hidden (view full) --- 446 traceData = NULL; 447 } 448} 449 450 451void 452BaseSimpleCPU::advancePC(Fault fault) 453{ |
454 if (fault != NoFault) { 455 curMacroStaticInst = StaticInst::nullStaticInstPtr; 456 fault->invoke(tc); 457 thread->setMicroPC(0); 458 thread->setNextMicroPC(1); |
459 } else if (predecoder.needMoreBytes()) { |
460 //If we're at the last micro op for this instruction 461 if (curStaticInst && curStaticInst->isLastMicroOp()) { 462 //We should be working with a macro op 463 assert(curMacroStaticInst); 464 //Close out this macro op, and clean up the 465 //microcode state 466 curMacroStaticInst = StaticInst::nullStaticInstPtr; 467 thread->setMicroPC(0); --- 27 unchanged lines hidden --- |