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__ |