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40 * Authors: Ron Dreslinski
45 * Describes a strided prefetcher.
48 #ifndef __MEM_CACHE_PREFETCH_STRIDE_HH__
49 #define __MEM_CACHE_PREFETCH_STRIDE_HH__
52 #include <unordered_map>
54 #include "base/types.hh"
55 #include "mem/cache/prefetch/queued.hh"
56 #include "mem/packet.hh"
58 struct StridePrefetcherParams;
60 class StridePrefetcher : public QueuedPrefetcher
68 const int pcTableAssoc;
69 const int pcTableSets;
71 const bool useMasterId;
77 StrideEntry() : instAddr(0), lastAddr(0), isSecure(false), stride(0),
91 PCTable(int assoc, int sets, const std::string name) :
92 pcTableAssoc(assoc), pcTableSets(sets), _name(name) {}
93 StrideEntry** operator[] (int context) {
94 auto it = entries.find(context);
95 if (it != entries.end())
98 return allocateNewContext(context);
103 const std::string name() {return _name; }
104 const int pcTableAssoc;
105 const int pcTableSets;
106 const std::string _name;
107 std::unordered_map<int, StrideEntry**> entries;
109 StrideEntry** allocateNewContext(int context);
113 bool pcTableHit(Addr pc, bool is_secure, int master_id, StrideEntry* &entry);
114 StrideEntry* pcTableVictim(Addr pc, int master_id);
116 Addr pcHash(Addr pc) const;
119 StridePrefetcher(const StridePrefetcherParams *p);
121 void calculatePrefetch(const PacketPtr &pkt,
122 std::vector<AddrPriority> &addresses);
125 #endif // __MEM_CACHE_PREFETCH_STRIDE_HH__