1/*
2 * Copyright (c) 2014 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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46#include "params/QueuedPrefetcher.hh"
47
48class QueuedPrefetcher : public BasePrefetcher
49{
50 protected:
51 struct DeferredPacket {
52 Tick tick;
53 PacketPtr pkt;
54 DeferredPacket(Tick t, PacketPtr p) : tick(t), pkt(p) {}
55 };
56
57 std::list<DeferredPacket> pfq;
58
59 // PARAMETERS
60
61 /** Maximum size of the prefetch queue */
62 const unsigned queueSize;
63

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71 const bool queueFilter;
72
73 /** Snoop the cache before generating prefetch (cheating basically) */
74 const bool cacheSnoop;
75
76 /** Tag prefetch with PC of generating access? */
77 const bool tagPrefetch;
78
79 bool inPrefetch(Addr address, bool is_secure) const;
80
81 // STATS
82 Stats::Scalar pfIdentified;
83 Stats::Scalar pfBufferHit;
84 Stats::Scalar pfInCache;
85 Stats::Scalar pfRemovedFull;
86 Stats::Scalar pfSpanPage;
87
88 public:
89 QueuedPrefetcher(const QueuedPrefetcherParams *p);
90 virtual ~QueuedPrefetcher();
91
92 Tick notify(const PacketPtr &pkt);
93
94 // Note: This should really be pure virtual, but doesnt go well with params
95 virtual void calculatePrefetch(const PacketPtr &pkt,
96 std::vector &addresses) = 0;
97 PacketPtr getPacket();
98
99 Tick nextPrefetchReadyTime() const
100 {
101 return pfq.empty() ? MaxTick : pfq.front().tick;
102 }
103
104 void regStats();
105};
106
107#endif //__MEM_CACHE_PREFETCH_QUEUED_HH__
108