diff options
Diffstat (limited to 'cpu/beta_cpu/fetch.hh')
-rw-r--r-- | cpu/beta_cpu/fetch.hh | 61 |
1 files changed, 27 insertions, 34 deletions
diff --git a/cpu/beta_cpu/fetch.hh b/cpu/beta_cpu/fetch.hh index da22baa9b..c7e72be47 100644 --- a/cpu/beta_cpu/fetch.hh +++ b/cpu/beta_cpu/fetch.hh @@ -1,15 +1,9 @@ -// Todo: add in statistics, only get the MachInst and let decode actually -// decode, think about SMT fetch, -// fix up branch prediction stuff into one thing, -// Figure out where to advance time buffer. Add a way to get a -// stage's current status. +// Todo: SMT fetch, +// Add a way to get a stage's current status. #ifndef __CPU_BETA_CPU_SIMPLE_FETCH_HH__ #define __CPU_BETA_CPU_SIMPLE_FETCH_HH__ -//Will want to include: time buffer, structs, MemInterface, Event, -//whatever class bzero uses, MemReqPtr - #include "base/statistics.hh" #include "base/timebuf.hh" #include "cpu/pc_event.hh" @@ -57,6 +51,19 @@ class SimpleFetch bool stalled; public: + class CacheCompletionEvent : public Event + { + private: + SimpleFetch *fetch; + + public: + CacheCompletionEvent(SimpleFetch *_fetch); + + virtual void process(); + virtual const char *description(); + }; + + public: /** SimpleFetch constructor. */ SimpleFetch(Params ¶ms); @@ -68,20 +75,9 @@ class SimpleFetch void setFetchQueue(TimeBuffer<FetchStruct> *fq_ptr); - void tick(); - - void fetch(); - void processCacheCompletion(); - // Figure out PC vs next PC and how it should be updated - void squash(const Addr &new_PC); - private: - inline void doSquash(const Addr &new_PC); - - void squashFromDecode(const Addr &new_PC, const InstSeqNum &seq_num); - /** * Looks up in the branch predictor to see if the next PC should be * either next PC+=MachInst or a branch target. @@ -101,6 +97,18 @@ class SimpleFetch */ Fault fetchCacheLine(Addr fetch_PC); + inline void doSquash(const Addr &new_PC); + + void squashFromDecode(const Addr &new_PC, const InstSeqNum &seq_num); + + public: + // Figure out PC vs next PC and how it should be updated + void squash(const Addr &new_PC); + + void tick(); + + void fetch(); + // Align an address (typically a PC) to the start of an I-cache block. // We fold in the PISA 64- to 32-bit conversion here as well. Addr icacheBlockAlignPC(Addr addr) @@ -109,21 +117,6 @@ class SimpleFetch return (addr & ~(cacheBlkMask)); } - public: - class CacheCompletionEvent : public Event - { - private: - SimpleFetch *fetch; - - public: - CacheCompletionEvent(SimpleFetch *_fetch); - - virtual void process(); - virtual const char *description(); - }; - -// CacheCompletionEvent cacheCompletionEvent; - private: /** Pointer to the FullCPU. */ FullCPU *cpu; |