1/*
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

--- 32 unchanged lines hidden (view full) ---

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"
52#include "mem/cache/prefetch/queued.hh"
53#include "params/StridePrefetcher.hh"
54
55class StridePrefetcher : public QueuedPrefetcher
56{
57 protected:
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

--- 9 unchanged lines hidden (view full) ---

75
76 Addr instAddr;
77 Addr lastAddr;
78 bool isSecure;
79 int stride;
80 int confidence;
81 };
82
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;
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
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);
115
116 void calculatePrefetch(const PacketPtr &pkt, std::vector<Addr> &addresses);
117};
118
119#endif // __MEM_CACHE_PREFETCH_STRIDE_HH__