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-rw-r--r--src/arch/alpha/tlb.hh16
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 &section);
+
+ // 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);
};
}