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Diffstat (limited to 'cpu/beta_cpu/full_cpu.cc')
| -rw-r--r-- | cpu/beta_cpu/full_cpu.cc | 520 |
1 files changed, 520 insertions, 0 deletions
diff --git a/cpu/beta_cpu/full_cpu.cc b/cpu/beta_cpu/full_cpu.cc new file mode 100644 index 000000000..d5228601c --- /dev/null +++ b/cpu/beta_cpu/full_cpu.cc @@ -0,0 +1,520 @@ +#ifndef __SIMPLE_FULL_CPU_CC__ +#define __SIMPLE_FULL_CPU_CC__ + +#ifdef FULL_SYSTEM +#include "sim/system.hh" +#else +#include "sim/process.hh" +#endif +#include "sim/universe.hh" + +#include "cpu/exec_context.hh" +#include "cpu/beta_cpu/full_cpu.hh" +#include "cpu/beta_cpu/alpha_impl.hh" +#include "cpu/beta_cpu/alpha_dyn_inst.hh" + +using namespace std; + +#ifdef FULL_SYSTEM +BaseFullCPU::BaseFullCPU(Params ¶ms) + : BaseCPU(params.name, params.numberOfThreads, + params.maxInstsAnyThread, params.maxInstsAllThreads, + params.maxLoadsAnyThread, params.maxLoadsAllThreads, + params._system, params.freq) +{ +} +#else +BaseFullCPU::BaseFullCPU(Params ¶ms) + : BaseCPU(params.name, params.numberOfThreads, + params.maxInstsAnyThread, params.maxInstsAllThreads, + params.maxLoadsAnyThread, params.maxLoadsAllThreads) +{ +} +#endif // FULL_SYSTEM + +template <class Impl> +FullBetaCPU<Impl>::TickEvent::TickEvent(FullBetaCPU<Impl> *c) + : Event(&mainEventQueue, CPU_Tick_Pri), cpu(c) +{ +} + +template <class Impl> +void +FullBetaCPU<Impl>::TickEvent::process() +{ + cpu->tick(); +} + +template <class Impl> +const char * +FullBetaCPU<Impl>::TickEvent::description() +{ + return "FullBetaCPU tick event"; +} + +//Call constructor to all the pipeline stages here +template <class Impl> +FullBetaCPU<Impl>::FullBetaCPU(Params ¶ms) +#ifdef FULL_SYSTEM + : BaseFullCPU(params), +#else + : BaseFullCPU(params), +#endif // FULL_SYSTEM + tickEvent(this), + fetch(params), + decode(params), + rename(params), + iew(params), + commit(params), + + regFile(params.numPhysIntRegs, params.numPhysFloatRegs), + + freeList(Impl::ISA::NumIntRegs, params.numPhysIntRegs, + Impl::ISA::NumFloatRegs, params.numPhysFloatRegs), + + renameMap(Impl::ISA::NumIntRegs, params.numPhysIntRegs, + Impl::ISA::NumFloatRegs, params.numPhysFloatRegs, + Impl::ISA::NumMiscRegs, + Impl::ISA::ZeroReg, + Impl::ISA::ZeroReg + Impl::ISA::NumIntRegs), + + rob(params.numROBEntries, params.squashWidth), + + // What to pass to these time buffers? + // For now just have these time buffers be pretty big. + timeBuffer(5, 5), + fetchQueue(5, 5), + decodeQueue(5, 5), + renameQueue(5, 5), + iewQueue(5, 5), + + xc(NULL), + + globalSeqNum(1), + +#ifdef FULL_SYSTEM + system(params.system), + memCtrl(system->memCtrl), + physmem(system->physmem), + itb(params.itb), + dtb(params.dtb), + mem(params.mem), +#else + process(params.process), + asid(params.asid), + mem(process->getMemory()), +#endif // FULL_SYSTEM + + icacheInterface(params.icacheInterface), + dcacheInterface(params.dcacheInterface), + deferRegistration(params.defReg), + numInsts(0), + funcExeInst(0) +{ + _status = Idle; +#ifdef FULL_SYSTEM + xc = new ExecContext(this, 0, system, itb, dtb, mem); + + // initialize CPU, including PC + TheISA::initCPU(&xc->regs); +#else + DPRINTF(FullCPU, "FullCPU: Process's starting PC is %#x, process is %#x", + process->prog_entry, process); + xc = new ExecContext(this, /* thread_num */ 0, process, /* asid */ 0); + + assert(process->getMemory() != NULL); + assert(mem != NULL); +#endif // !FULL_SYSTEM + execContexts.push_back(xc); + + // The stages also need their CPU pointer setup. However this must be + // done at the upper level CPU because they have pointers to the upper + // level CPU, and not this FullBetaCPU. + + // Give each of the stages the time buffer they will use. + fetch.setTimeBuffer(&timeBuffer); + decode.setTimeBuffer(&timeBuffer); + rename.setTimeBuffer(&timeBuffer); + iew.setTimeBuffer(&timeBuffer); + commit.setTimeBuffer(&timeBuffer); + + // Also setup each of the stages' queues. + fetch.setFetchQueue(&fetchQueue); + decode.setFetchQueue(&fetchQueue); + decode.setDecodeQueue(&decodeQueue); + rename.setDecodeQueue(&decodeQueue); + rename.setRenameQueue(&renameQueue); + iew.setRenameQueue(&renameQueue); + iew.setIEWQueue(&iewQueue); + commit.setIEWQueue(&iewQueue); + commit.setRenameQueue(&renameQueue); + + // Setup the rename map for whichever stages need it. + rename.setRenameMap(&renameMap); + iew.setRenameMap(&renameMap); + + // Setup the free list for whichever stages need it. + rename.setFreeList(&freeList); + renameMap.setFreeList(&freeList); + + // Setup the ROB for whichever stages need it. + commit.setROB(&rob); +} + +template <class Impl> +FullBetaCPU<Impl>::~FullBetaCPU() +{ +} + +template <class Impl> +void +FullBetaCPU<Impl>::fullCPURegStats() +{ + // Register any of the FullCPU's stats here. +} + +template <class Impl> +void +FullBetaCPU<Impl>::tick() +{ + DPRINTF(FullCPU, "\n\nFullCPU: Ticking main, FullBetaCPU.\n"); + + //Tick each of the stages if they're actually running. + //Will want to figure out a way to unschedule itself if they're all + //going to be idle for a long time. + fetch.tick(); + + decode.tick(); + + rename.tick(); + + iew.tick(); + + commit.tick(); + + // Now advance the time buffers, unless the stage is stalled. + timeBuffer.advance(); + + fetchQueue.advance(); + decodeQueue.advance(); + renameQueue.advance(); + iewQueue.advance(); + + if (_status == Running && !tickEvent.scheduled()) + tickEvent.schedule(curTick + 1); +} + +template <class Impl> +void +FullBetaCPU<Impl>::init() +{ + if(!deferRegistration) + { + this->registerExecContexts(); + + // Need to do a copy of the xc->regs into the CPU's regfile so + // that it can start properly. + + // First loop through the integer registers. + for (int i = 0; i < Impl::ISA::NumIntRegs; ++i) + { + regFile.intRegFile[i] = xc->regs.intRegFile[i]; + } + + // Then loop through the floating point registers. + for (int i = 0; i < Impl::ISA::NumFloatRegs; ++i) + { + regFile.floatRegFile[i].d = xc->regs.floatRegFile.d[i]; + regFile.floatRegFile[i].q = xc->regs.floatRegFile.q[i]; + } + + // Then loop through the misc registers. + regFile.miscRegs.fpcr = xc->regs.miscRegs.fpcr; + regFile.miscRegs.uniq = xc->regs.miscRegs.uniq; + regFile.miscRegs.lock_flag = xc->regs.miscRegs.lock_flag; + regFile.miscRegs.lock_addr = xc->regs.miscRegs.lock_addr; + + // Then finally set the PC and the next PC. + regFile.pc = xc->regs.pc; + regFile.npc = xc->regs.npc; + } +} + +template <class Impl> +void +FullBetaCPU<Impl>::activateContext(int thread_num, int delay) +{ + // Needs to set each stage to running as well. + + scheduleTickEvent(delay); + + _status = Running; +} + +template <class Impl> +void +FullBetaCPU<Impl>::suspendContext(int thread_num) +{ + panic("suspendContext unimplemented!"); +} + +template <class Impl> +void +FullBetaCPU<Impl>::deallocateContext(int thread_num) +{ + panic("deallocateContext unimplemented!"); +} + +template <class Impl> +void +FullBetaCPU<Impl>::haltContext(int thread_num) +{ + panic("haltContext unimplemented!"); +} + +template <class Impl> +void +FullBetaCPU<Impl>::switchOut() +{ + panic("FullBetaCPU does not have a switch out function.\n"); +} + +template <class Impl> +void +FullBetaCPU<Impl>::takeOverFrom(BaseCPU *oldCPU) +{ + BaseCPU::takeOverFrom(oldCPU); + + assert(!tickEvent.scheduled()); + + // Set all status's to active, schedule the + // CPU's tick event. + tickEvent.schedule(curTick); + for (int i = 0; i < execContexts.size(); ++i) { + execContexts[i]->activate(); + } + + // Switch out the other CPU. + oldCPU->switchOut(); +} + +template <class Impl> +InstSeqNum +FullBetaCPU<Impl>::getAndIncrementInstSeq() +{ + // Hopefully this works right. + return globalSeqNum++; +} + +template <class Impl> +uint64_t +FullBetaCPU<Impl>::readIntReg(int reg_idx) +{ + return regFile.readIntReg(reg_idx); +} + +template <class Impl> +float +FullBetaCPU<Impl>::readFloatRegSingle(int reg_idx) +{ + return regFile.readFloatRegSingle(reg_idx); +} + +template <class Impl> +double +FullBetaCPU<Impl>::readFloatRegDouble(int reg_idx) +{ + return regFile.readFloatRegDouble(reg_idx); +} + +template <class Impl> +uint64_t +FullBetaCPU<Impl>::readFloatRegInt(int reg_idx) +{ + return regFile.readFloatRegInt(reg_idx); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setIntReg(int reg_idx, uint64_t val) +{ + regFile.setIntReg(reg_idx, val); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setFloatRegSingle(int reg_idx, float val) +{ + regFile.setFloatRegSingle(reg_idx, val); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setFloatRegDouble(int reg_idx, double val) +{ + regFile.setFloatRegDouble(reg_idx, val); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setFloatRegInt(int reg_idx, uint64_t val) +{ + regFile.setFloatRegInt(reg_idx, val); +} + +template <class Impl> +uint64_t +FullBetaCPU<Impl>::readPC() +{ + return regFile.readPC(); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setNextPC(uint64_t val) +{ + regFile.setNextPC(val); +} + +template <class Impl> +void +FullBetaCPU<Impl>::setPC(Addr new_PC) +{ + regFile.setPC(new_PC); +} + +template <class Impl> +void +FullBetaCPU<Impl>::addInst(DynInstPtr &inst) +{ + instList.push_back(inst); +} + +template <class Impl> +void +FullBetaCPU<Impl>::instDone() +{ + // Keep an instruction count. + numInsts++; + + // Check for instruction-count-based events. + comInstEventQueue[0]->serviceEvents(numInsts); +} + +template <class Impl> +void +FullBetaCPU<Impl>::removeBackInst(DynInstPtr &inst) +{ + DynInstPtr inst_to_delete; + + // Walk through the instruction list, removing any instructions + // that were inserted after the given instruction, inst. + while (instList.back() != inst) + { + assert(!instList.empty()); + + // Obtain the pointer to the instruction. + inst_to_delete = instList.back(); + + DPRINTF(FullCPU, "FullCPU: Removing instruction %i, PC %#x\n", + inst_to_delete->seqNum, inst_to_delete->readPC()); + + // Remove the instruction from the list. + instList.pop_back(); + + // Mark it as squashed. + inst_to_delete->setSquashed(); + } +} + +template <class Impl> +void +FullBetaCPU<Impl>::removeFrontInst(DynInstPtr &inst) +{ + DynInstPtr inst_to_remove; + + // The front instruction should be the same one being asked to be removed. + assert(instList.front() == inst); + + // Remove the front instruction. + inst_to_remove = inst; + instList.pop_front(); + + DPRINTF(FullCPU, "FullCPU: Removing committed instruction %#x, PC %#x\n", + inst_to_remove, inst_to_remove->readPC()); +} + +template <class Impl> +void +FullBetaCPU<Impl>::removeInstsNotInROB() +{ + DPRINTF(FullCPU, "FullCPU: Deleting instructions from instruction " + "list.\n"); + + DynInstPtr rob_tail = rob.readTailInst(); + + removeBackInst(rob_tail); +} + +template <class Impl> +void +FullBetaCPU<Impl>::removeInstsUntil(const InstSeqNum &seq_num) +{ + DPRINTF(FullCPU, "FullCPU: Deleting instructions from instruction " + "list.\n"); + + DynInstPtr inst_to_delete; + + while (instList.back()->seqNum > seq_num) { + assert(!instList.empty()); + + // Obtain the pointer to the instruction. + inst_to_delete = instList.back(); + + DPRINTF(FullCPU, "FullCPU: Removing instruction %i, PC %#x\n", + inst_to_delete->seqNum, inst_to_delete->readPC()); + + // Remove the instruction from the list. + instList.pop_back(); + + // Mark it as squashed. + inst_to_delete->setSquashed(); + } + +} + +template <class Impl> +void +FullBetaCPU<Impl>::removeAllInsts() +{ + instList.clear(); +} + +template <class Impl> +void +FullBetaCPU<Impl>::dumpInsts() +{ + int num = 0; + typename list<DynInstPtr>::iterator inst_list_it = instList.begin(); + + while (inst_list_it != instList.end()) + { + cprintf("Instruction:%i\nPC:%#x\nSN:%lli\nIssued:%i\nSquashed:%i\n\n", + num, (*inst_list_it)->readPC(), (*inst_list_it)->seqNum, + (*inst_list_it)->isIssued(), (*inst_list_it)->isSquashed()); + inst_list_it++; + ++num; + } +} + +template <class Impl> +void +FullBetaCPU<Impl>::wakeDependents(DynInstPtr &inst) +{ + iew.wakeDependents(inst); +} + +// Forward declaration of FullBetaCPU. +template FullBetaCPU<AlphaSimpleImpl>; + +#endif // __SIMPLE_FULL_CPU_HH__ |