1/*
2 * Copyright (c) 2012-2013 ARM Limited
3 * All rights reserved
4 *
5 * The license below extends only to copyright in the software and shall
6 * not be construed as granting a license to any other intellectual
7 * property including but not limited to intellectual property relating
8 * to a hardware implementation of the functionality of the software
9 * licensed hereunder. You may use the software subject to the license
10 * terms below provided that you ensure that this notice is replicated

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43/**
44 * @file
45 * Describes a strided prefetcher.
46 */
47
48#ifndef __MEM_CACHE_PREFETCH_STRIDE_HH__
49#define __MEM_CACHE_PREFETCH_STRIDE_HH__
50
51#include "mem/cache/prefetch/queued.hh"
52#include "params/StridePrefetcher.hh"
53
54class StridePrefetcher : public QueuedPrefetcher
55{
56 protected:
57 static const int maxContexts = 64;
58
59 const int maxConf;
60 const int threshConf;
61 const int minConf;
62 const int startConf;
63
64 const int pcTableAssoc;
65 const int pcTableSets;
66

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76
77 Addr instAddr;
78 Addr lastAddr;
79 bool isSecure;
80 int stride;
81 int confidence;
82 };
83
84 StrideEntry **pcTable[maxContexts];
85
86 bool pcTableHit(Addr pc, bool is_secure, int master_id, StrideEntry* &entry);
87 StrideEntry* pcTableVictim(Addr pc, int master_id);
88
89 Addr pcHash(Addr pc) const;
90 public:
91
92 StridePrefetcher(const StridePrefetcherParams *p);
93 ~StridePrefetcher();
94
95 void calculatePrefetch(const PacketPtr &pkt, std::vector<Addr> &addresses);
96};
97
98#endif // __MEM_CACHE_PREFETCH_STRIDE_HH__