queued.hh (10623:b9646f4546ad) queued.hh (11439:d0368996f1e0)
1/*
1/*
2 * Copyright (c) 2014 ARM Limited
2 * Copyright (c) 2014-2015 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;
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) {}
54 int32_t priority;
55 DeferredPacket(Tick t, PacketPtr p, int32_t pr) : tick(t), pkt(p),
56 priority(pr) {}
57 bool operator>(const DeferredPacket& that) const
58 {
59 return priority > that.priority;
60 }
61 bool operator<(const DeferredPacket& that) const
62 {
63 return priority < that.priority;
64 }
65 bool operator<=(const DeferredPacket& that) const
66 {
67 return !(*this > that);
68 }
55 };
69 };
70 using AddrPriority = std::pair<Addr, int32_t>;
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
71
72 std::list<DeferredPacket> pfq;
73
74 // PARAMETERS
75
76 /** Maximum size of the prefetch queue */
77 const unsigned queueSize;
78

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86 const bool queueFilter;
87
88 /** Snoop the cache before generating prefetch (cheating basically) */
89 const bool cacheSnoop;
90
91 /** Tag prefetch with PC of generating access? */
92 const bool tagPrefetch;
93
79 bool inPrefetch(Addr address, bool is_secure) const;
94 using const_iterator = std::list<DeferredPacket>::const_iterator;
95 std::list<DeferredPacket>::const_iterator inPrefetch(Addr address,
96 bool is_secure) const;
97 using iterator = std::list<DeferredPacket>::iterator;
98 std::list<DeferredPacket>::iterator inPrefetch(Addr address,
99 bool is_secure);
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);
100
101 // STATS
102 Stats::Scalar pfIdentified;
103 Stats::Scalar pfBufferHit;
104 Stats::Scalar pfInCache;
105 Stats::Scalar pfRemovedFull;
106 Stats::Scalar pfSpanPage;
107
108 public:
109 QueuedPrefetcher(const QueuedPrefetcherParams *p);
110 virtual ~QueuedPrefetcher();
111
112 Tick notify(const PacketPtr &pkt);
113 PacketPtr insert(AddrPriority& info, bool is_secure);
93
94 // Note: This should really be pure virtual, but doesnt go well with params
95 virtual void calculatePrefetch(const PacketPtr &pkt,
114
115 // Note: This should really be pure virtual, but doesnt go well with params
116 virtual void calculatePrefetch(const PacketPtr &pkt,
96 std::vector &addresses) = 0;
117 std::vector<AddrPriority> &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
118 PacketPtr getPacket();
119
120 Tick nextPrefetchReadyTime() const
121 {
122 return pfq.empty() ? MaxTick : pfq.front().tick;
123 }
124
125 void regStats();
126};
127
128#endif //__MEM_CACHE_PREFETCH_QUEUED_HH__
129