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;

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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
82 thread->setStatus(ThreadContext::Unallocated);
83
84 tc = thread->getTC();
85
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)

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330#if ISA_HAS_DELAY_SLOT
331 DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p NNPC:%08p\n",thread->readPC(),
332 thread->readNextPC(),thread->readNextNPC());
333#else
334 DPRINTF(Fetch,"Fetch: PC:%08p NPC:%08p",thread->readPC(),
335 thread->readNextPC());
336#endif
337
338 req->setVirt(0, thread->readPC() & ~3, sizeof(MachInst),
339 (FULL_SYSTEM && (thread->readPC() & 1)) ? PHYSICAL : 0,
340 thread->readPC());
341
342 Fault fault = thread->translateInstReq(req);
343
344 return fault;
345}
346
347
348void

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360
361 thread->funcExeInst++;
362
363 // check for instruction-count-based events
364 comInstEventQueue[0]->serviceEvents(numInst);
365
366 // decode the instruction
367 inst = gtoh(inst);
368 //If we're not in the middle of a macro instruction
369 if (!curMacroStaticInst) {
370 StaticInstPtr instPtr = NULL;
371
372 //Predecode, ie bundle up an ExtMachInst
373 //This should go away once the constructor can be set up properly
374 predecoder.setTC(thread->getTC());
375 //If more fetch data is needed, pass it in.
376 if(predecoder.needMoreBytes())
377 predecoder.moreBytes(thread->readPC(), 0, inst);
378 else
379 predecoder.process();
380 //If an instruction is ready, decode it
381 if (predecoder.extMachInstReady())
382 instPtr = StaticInst::decode(predecoder.getExtMachInst());
383
384 //If we decoded an instruction and it's microcoded, start pulling
385 //out micro ops
386 if (instPtr && instPtr->isMacroOp()) {
387 curMacroStaticInst = instPtr;
388 curStaticInst = curMacroStaticInst->
389 fetchMicroOp(thread->readMicroPC());
390 } else {

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442 traceData = NULL;
443 }
444}
445
446
447void
448BaseSimpleCPU::advancePC(Fault fault)
449{
450 if (fault != NoFault) {
451 curMacroStaticInst = StaticInst::nullStaticInstPtr;
452 fault->invoke(tc);
453 thread->setMicroPC(0);
454 thread->setNextMicroPC(1);
455 } else if (predecoder.needMoreBytes()) {
456 //If we're at the last micro op for this instruction
457 if (curStaticInst && curStaticInst->isLastMicroOp()) {
458 //We should be working with a macro op
459 assert(curMacroStaticInst);
460 //Close out this macro op, and clean up the
461 //microcode state
462 curMacroStaticInst = StaticInst::nullStaticInstPtr;
463 thread->setMicroPC(0);

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