1/* |
2 * Copyright (c) 2018 Inria |
3 * Copyright (c) 2012-2013, 2015 ARM Limited 4 * All rights reserved 5 * 6 * The license below extends only to copyright in the software and shall 7 * not be construed as granting a license to any other intellectual 8 * property including but not limited to intellectual property relating 9 * to a hardware implementation of the functionality of the software 10 * licensed hereunder. You may use the software subject to the license --- 23 unchanged lines hidden (view full) --- 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Ron Dreslinski |
42 * Daniel Carvalho |
43 */ 44 45/** 46 * @file 47 * Describes a strided prefetcher. 48 */ 49 50#ifndef __MEM_CACHE_PREFETCH_STRIDE_HH__ 51#define __MEM_CACHE_PREFETCH_STRIDE_HH__ 52 53#include <string> 54#include <unordered_map> 55#include <vector> 56 57#include "base/types.hh" 58#include "mem/cache/prefetch/queued.hh" |
59#include "mem/cache/replacement_policies/replaceable_entry.hh" |
60#include "mem/packet.hh" 61 |
62class BaseReplacementPolicy; |
63struct StridePrefetcherParams; 64 65class StridePrefetcher : public QueuedPrefetcher 66{ 67 protected: 68 const int maxConf; 69 const int threshConf; 70 const int minConf; 71 const int startConf; 72 73 const int pcTableAssoc; 74 const int pcTableSets; 75 76 const bool useMasterId; 77 78 const int degree; 79 |
80 /** Replacement policy used in the PC tables. */ 81 BaseReplacementPolicy* replacementPolicy; 82 83 struct StrideEntry : public ReplaceableEntry |
84 { 85 /** Default constructor */ 86 StrideEntry(); 87 88 /** Invalidate the entry */ 89 void invalidate(); 90 91 Addr instAddr; --- 7 unchanged lines hidden (view full) --- 99 { 100 public: 101 /** 102 * Default constructor. Create a table with given parameters. 103 * 104 * @param assoc Associativity of the table. 105 * @param sets Number of sets in the table. 106 * @param name Name of the prefetcher. |
107 * @param replacementPolicy Replacement policy used by the table. |
108 */ |
109 PCTable(int assoc, int sets, const std::string name, 110 BaseReplacementPolicy* replacementPolicy); |
111 112 /** 113 * Default destructor. 114 */ 115 ~PCTable(); 116 117 /** 118 * Search for an entry in the pc table. --- 9 unchanged lines hidden (view full) --- 128 * 129 * @param pc The PC value. 130 * @return The victimized entry. 131 */ 132 StrideEntry* findVictim(Addr pc); 133 134 private: 135 const std::string name() {return _name; } |
136 const int pcTableSets; 137 const std::string _name; 138 std::vector<std::vector<StrideEntry>> entries; 139 140 /** |
141 * Replacement policy used by StridePrefetcher. 142 */ 143 BaseReplacementPolicy* replacementPolicy; 144 145 /** |
146 * PC hashing function to index sets in the table. 147 * 148 * @param pc The PC value. 149 * @return The set to which this PC maps. 150 */ 151 Addr pcHash(Addr pc) const; 152 }; 153 std::unordered_map<int, PCTable> pcTables; --- 26 unchanged lines hidden --- |