diff options
Diffstat (limited to 'src/arch/alpha/tlb.hh')
| -rw-r--r-- | src/arch/alpha/tlb.hh | 16 |
1 files changed, 13 insertions, 3 deletions
diff --git a/src/arch/alpha/tlb.hh b/src/arch/alpha/tlb.hh index ea5ba5539..a4255f3c5 100644 --- a/src/arch/alpha/tlb.hh +++ b/src/arch/alpha/tlb.hh @@ -61,7 +61,7 @@ namespace AlphaISA int nlu; // not last used entry (for replacement) void nextnlu() { if (++nlu >= size) nlu = 0; } - PTE *lookup(Addr vpn, uint8_t asn) const; + PTE *lookup(Addr vpn, uint8_t asn); public: TLB(const std::string &name, int size); @@ -88,6 +88,16 @@ namespace AlphaISA // Checkpointing virtual void serialize(std::ostream &os); virtual void unserialize(Checkpoint *cp, const std::string §ion); + + // Most recently used page table entries + PTE *PTECache[3]; + inline void flushCache() { memset(PTECache, 0, 3 * sizeof(PTE*)); } + inline PTE* updateCache(PTE *pte) { + PTECache[2] = PTECache[1]; + PTECache[1] = PTECache[0]; + PTECache[0] = pte; + return pte; + } }; class ITB : public TLB @@ -102,7 +112,7 @@ namespace AlphaISA ITB(const std::string &name, int size); virtual void regStats(); - Fault translate(RequestPtr &req, ThreadContext *tc) const; + Fault translate(RequestPtr &req, ThreadContext *tc); }; class DTB : public TLB @@ -125,7 +135,7 @@ namespace AlphaISA DTB(const std::string &name, int size); virtual void regStats(); - Fault translate(RequestPtr &req, ThreadContext *tc, bool write) const; + Fault translate(RequestPtr &req, ThreadContext *tc, bool write); }; } |