1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 47 unchanged lines hidden (view full) --- 56 typedef std::multimap<Addr, int> PageTable; 57 PageTable lookupTable; // Quick lookup into page table 58 59 PTE *table; // the Page Table 60 int size; // TLB Size 61 int nlu; // not last used entry (for replacement) 62 63 void nextnlu() { if (++nlu >= size) nlu = 0; } |
64 PTE *lookup(Addr vpn, uint8_t asn); |
65 66 public: 67 TLB(const std::string &name, int size); 68 virtual ~TLB(); 69 70 int getsize() const { return size; } 71 72 PTE &index(bool advance = true); --- 14 unchanged lines hidden (view full) --- 87 88 // Checkpointing 89 virtual void serialize(std::ostream &os); 90 virtual void unserialize(Checkpoint *cp, const std::string §ion); 91 92 // Most recently used page table entries 93 PTE *PTECache[3]; 94 inline void flushCache() { memset(PTECache, 0, 3 * sizeof(PTE*)); } |
95 inline PTE* updateCache(PTE *pte) { 96 PTECache[2] = PTECache[1]; 97 PTECache[1] = PTECache[0]; 98 PTECache[0] = pte; 99 return pte; 100 } |
101 }; 102 103 class ITB : public TLB 104 { 105 protected: 106 mutable Stats::Scalar<> hits; 107 mutable Stats::Scalar<> misses; 108 mutable Stats::Scalar<> acv; 109 mutable Stats::Formula accesses; 110 111 public: 112 ITB(const std::string &name, int size); 113 virtual void regStats(); 114 |
115 Fault translate(RequestPtr &req, ThreadContext *tc); |
116 }; 117 118 class DTB : public TLB 119 { 120 protected: 121 mutable Stats::Scalar<> read_hits; 122 mutable Stats::Scalar<> read_misses; 123 mutable Stats::Scalar<> read_acv; --- 6 unchanged lines hidden (view full) --- 130 Stats::Formula misses; 131 Stats::Formula acv; 132 Stats::Formula accesses; 133 134 public: 135 DTB(const std::string &name, int size); 136 virtual void regStats(); 137 |
138 Fault translate(RequestPtr &req, ThreadContext *tc, bool write); |
139 }; 140} 141 142#endif // __ALPHA_MEMORY_HH__ |