stride.hh (10623:b9646f4546ad) stride.hh (10771:ea35886cd847)
1/*
1/*
2 * Copyright (c) 2012-2013 ARM Limited
2 * Copyright (c) 2012-2013, 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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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
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 "base/hashmap.hh"
51#include "mem/cache/prefetch/queued.hh"
52#include "params/StridePrefetcher.hh"
53
54class StridePrefetcher : public QueuedPrefetcher
55{
56 protected:
52#include "mem/cache/prefetch/queued.hh"
53#include "params/StridePrefetcher.hh"
54
55class StridePrefetcher : public QueuedPrefetcher
56{
57 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
58 const int maxConf;
59 const int threshConf;
60 const int minConf;
61 const int startConf;
62
63 const int pcTableAssoc;
64 const int pcTableSets;
65

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75
76 Addr instAddr;
77 Addr lastAddr;
78 bool isSecure;
79 int stride;
80 int confidence;
81 };
82
84 StrideEntry **pcTable[maxContexts];
83 class PCTable
84 {
85 public:
86 PCTable(int assoc, int sets, const std::string name) :
87 pcTableAssoc(assoc), pcTableSets(sets), _name(name) {}
88 StrideEntry** operator[] (int context) {
89 auto it = entries.find(context);
90 if (it != entries.end())
91 return it->second;
85
92
93 return allocateNewContext(context);
94 }
95
96 ~PCTable();
97 private:
98 const std::string name() {return _name; }
99 const int pcTableAssoc;
100 const int pcTableSets;
101 const std::string _name;
102 m5::hash_map<int, StrideEntry**> entries;
103
104 StrideEntry** allocateNewContext(int context);
105 };
106 PCTable pcTable;
107
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);
108 bool pcTableHit(Addr pc, bool is_secure, int master_id, StrideEntry* &entry);
109 StrideEntry* pcTableVictim(Addr pc, int master_id);
110
111 Addr pcHash(Addr pc) const;
112 public:
113
114 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__
115
116 void calculatePrefetch(const PacketPtr &pkt, std::vector<Addr> &addresses);
117};
118
119#endif // __MEM_CACHE_PREFETCH_STRIDE_HH__