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Diffstat (limited to 'cpu/beta_cpu/full_cpu.hh')
| -rw-r--r-- | cpu/beta_cpu/full_cpu.hh | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/cpu/beta_cpu/full_cpu.hh b/cpu/beta_cpu/full_cpu.hh new file mode 100644 index 000000000..85fc49371 --- /dev/null +++ b/cpu/beta_cpu/full_cpu.hh @@ -0,0 +1,336 @@ +//Todo: Add in a lot of the functions that are ISA specific. Also define +//the functions that currently exist within the base cpu class. Define +//everything for the simobject stuff so it can be serialized and +//instantiated, add in debugging statements everywhere. Have CPU schedule +//itself properly. Constructor. Derived alpha class. Threads! +// Avoid running stages and advancing queues if idle/stalled. + +#ifndef __CPU_BETA_CPU_FULL_CPU_HH__ +#define __CPU_BETA_CPU_FULL_CPU_HH__ + +#include <iostream> +#include <list> +#include <vector> + +#include "cpu/beta_cpu/comm.hh" + +#include "base/statistics.hh" +#include "base/timebuf.hh" +#include "cpu/base_cpu.hh" +#include "cpu/exec_context.hh" +#include "cpu/beta_cpu/cpu_policy.hh" +#include "sim/process.hh" + +#ifdef FULL_SYSTEM +#include "arch/alpha/ev5.hh" +using namespace EV5; +#endif + +class FunctionalMemory; +class Process; + +class BaseFullCPU : public BaseCPU +{ + //Stuff that's pretty ISA independent will go here. + public: + typedef BaseCPU::Params Params; + +#ifdef FULL_SYSTEM + BaseFullCPU(Params ¶ms); +#else + BaseFullCPU(Params ¶ms); +#endif // FULL_SYSTEM + + private: + int cpu_id; +}; + +template <class Impl> +class FullBetaCPU : public BaseFullCPU +{ + public: + //Put typedefs from the Impl here. + typedef typename Impl::ISA ISA; + typedef typename Impl::CPUPol CPUPolicy; + typedef typename Impl::Params Params; + typedef typename Impl::DynInstPtr DynInstPtr; + + public: + enum Status { + Running, + Idle, + Halted, + Blocked // ? + }; + + Status _status; + + private: + class TickEvent : public Event + { + private: + FullBetaCPU<Impl> *cpu; + + public: + TickEvent(FullBetaCPU<Impl> *c); + void process(); + const char *description(); + }; + + TickEvent tickEvent; + + /// Schedule tick event, regardless of its current state. + void scheduleTickEvent(int delay) + { + if (tickEvent.squashed()) + tickEvent.reschedule(curTick + delay); + else if (!tickEvent.scheduled()) + tickEvent.schedule(curTick + delay); + } + + /// Unschedule tick event, regardless of its current state. + void unscheduleTickEvent() + { + if (tickEvent.scheduled()) + tickEvent.squash(); + } + + public: + void tick(); + + FullBetaCPU(Params ¶ms); + ~FullBetaCPU(); + + void init(); + + void fullCPURegStats(); + + void activateContext(int thread_num, int delay); + void suspendContext(int thread_num); + void deallocateContext(int thread_num); + void haltContext(int thread_num); + + void switchOut(); + void takeOverFrom(BaseCPU *oldCPU); + + /** Get the current instruction sequence number, and increment it. */ + InstSeqNum getAndIncrementInstSeq(); + +#ifdef FULL_SYSTEM + /** Check if this address is a valid instruction address. */ + bool validInstAddr(Addr addr) { return true; } + + /** Check if this address is a valid data address. */ + bool validDataAddr(Addr addr) { return true; } + + /** Get instruction asid. */ + int getInstAsid() + { return ITB_ASN_ASN(regFile.getIpr()[ISA::IPR_ITB_ASN]); } + + /** Get data asid. */ + int getDataAsid() + { return DTB_ASN_ASN(regFile.getIpr()[ISA::IPR_DTB_ASN]); } +#else + bool validInstAddr(Addr addr) + { return thread[0]->validInstAddr(addr); } + + bool validDataAddr(Addr addr) + { return thread[0]->validDataAddr(addr); } + + int getInstAsid() { return thread[0]->asid; } + int getDataAsid() { return thread[0]->asid; } + +#endif + + // + // New accessors for new decoder. + // + uint64_t readIntReg(int reg_idx); + + float readFloatRegSingle(int reg_idx); + + double readFloatRegDouble(int reg_idx); + + uint64_t readFloatRegInt(int reg_idx); + + void setIntReg(int reg_idx, uint64_t val); + + void setFloatRegSingle(int reg_idx, float val); + + void setFloatRegDouble(int reg_idx, double val); + + void setFloatRegInt(int reg_idx, uint64_t val); + + uint64_t readPC(); + + void setNextPC(uint64_t val); + + void setPC(Addr new_PC); + + /** Function to add instruction onto the head of the list of the + * instructions. Used when new instructions are fetched. + */ + void addInst(DynInstPtr &inst); + + /** Function to tell the CPU that an instruction has completed. */ + void instDone(); + + /** Remove all instructions in back of the given instruction, but leave + * that instruction in the list. This is useful in a squash, when there + * are instructions in this list that don't exist in structures such as + * the ROB. The instruction doesn't have to be the last instruction in + * the list, but will be once this function completes. + * @todo: Remove only up until that inst? Squashed inst is most likely + * valid. + */ + void removeBackInst(DynInstPtr &inst); + + /** Remove an instruction from the front of the list. It is expected + * that there are no instructions in front of it (that is, none are older + * than the instruction being removed). Used when retiring instructions. + * @todo: Remove the argument to this function, and just have it remove + * last instruction once it's verified that commit has the same ordering + * as the instruction list. + */ + void removeFrontInst(DynInstPtr &inst); + + /** Remove all instructions that are not currently in the ROB. */ + void removeInstsNotInROB(); + + /** Remove all instructions younger than the given sequence number. */ + void removeInstsUntil(const InstSeqNum &seq_num); + + /** Remove all instructions from the list. */ + void removeAllInsts(); + + void dumpInsts(); + + /** Basically a wrapper function so that instructions executed at + * commit can tell the instruction queue that they have completed. + * Eventually this hack should be removed. + */ + void wakeDependents(DynInstPtr &inst); + + public: + /** List of all the instructions in flight. */ + list<DynInstPtr> instList; + + //not sure these should be private. + protected: + /** The fetch stage. */ + typename CPUPolicy::Fetch fetch; + + /** The fetch stage's status. */ + typename CPUPolicy::Fetch::Status fetchStatus; + + /** The decode stage. */ + typename CPUPolicy::Decode decode; + + /** The decode stage's status. */ + typename CPUPolicy::Decode::Status decodeStatus; + + /** The dispatch stage. */ + typename CPUPolicy::Rename rename; + + /** The dispatch stage's status. */ + typename CPUPolicy::Rename::Status renameStatus; + + /** The issue/execute/writeback stages. */ + typename CPUPolicy::IEW iew; + + /** The issue/execute/writeback stage's status. */ + typename CPUPolicy::IEW::Status iewStatus; + + /** The commit stage. */ + typename CPUPolicy::Commit commit; + + /** The fetch stage's status. */ + typename CPUPolicy::Commit::Status commitStatus; + + //Might want to just pass these objects in to the constructors of the + //appropriate stage. regFile is in iew, freeList in dispatch, renameMap + //in dispatch, and the rob in commit. + /** The register file. */ + typename CPUPolicy::RegFile regFile; + + /** The free list. */ + typename CPUPolicy::FreeList freeList; + + /** The rename map. */ + typename CPUPolicy::RenameMap renameMap; + + /** The re-order buffer. */ + typename CPUPolicy::ROB rob; + + public: + /** Typedefs from the Impl to get the structs that each of the + * time buffers should use. + */ + typedef typename CPUPolicy::TimeStruct TimeStruct; + + typedef typename CPUPolicy::FetchStruct FetchStruct; + + typedef typename CPUPolicy::DecodeStruct DecodeStruct; + + typedef typename CPUPolicy::RenameStruct RenameStruct; + + typedef typename CPUPolicy::IEWStruct IEWStruct; + + /** The main time buffer to do backwards communication. */ + TimeBuffer<TimeStruct> timeBuffer; + + /** The fetch stage's instruction queue. */ + TimeBuffer<FetchStruct> fetchQueue; + + /** The decode stage's instruction queue. */ + TimeBuffer<DecodeStruct> decodeQueue; + + /** The rename stage's instruction queue. */ + TimeBuffer<RenameStruct> renameQueue; + + /** The IEW stage's instruction queue. */ + TimeBuffer<IEWStruct> iewQueue; + + public: + /** The temporary exec context to support older accessors. */ + ExecContext *xc; + + /** Temporary function to get pointer to exec context. */ + ExecContext *xcBase() + { +#ifdef FULL_SYSTEM + return system->execContexts[0]; +#else + return thread[0]; +#endif + } + + InstSeqNum globalSeqNum; + +#ifdef FULL_SYSTEM + System *system; + + MemoryController *memCtrl; + PhysicalMemory *physmem; + + AlphaITB *itb; + AlphaDTB *dtb; + +// SWContext *swCtx; +#else + std::vector<ExecContext *> thread; +#endif + + FunctionalMemory *mem; + + MemInterface *icacheInterface; + MemInterface *dcacheInterface; + + bool deferRegistration; + + Counter numInsts; + + Counter funcExeInst; +}; + +#endif |