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 --- 43 unchanged lines hidden (view full) --- 54 : QueuedPrefetcher(p), 55 maxConf(p->max_conf), 56 threshConf(p->thresh_conf), 57 minConf(p->min_conf), 58 startConf(p->start_conf), 59 pcTableAssoc(p->table_assoc), 60 pcTableSets(p->table_sets), 61 useMasterId(p->use_master_id), |
62 degree(p->degree), 63 pcTable(pcTableAssoc, pcTableSets, name()) |
64{ 65 // Don't consult stride prefetcher on instruction accesses 66 onInst = false; 67 68 assert(isPowerOf2(pcTableSets)); |
69} |
70 |
71StridePrefetcher::StrideEntry** 72StridePrefetcher::PCTable::allocateNewContext(int context) 73{ 74 auto res = entries.insert(std::make_pair(context, 75 new StrideEntry*[pcTableSets])); 76 auto it = res.first; 77 chatty_assert(res.second, "Allocating an already created context\n"); 78 assert(it->first == context); 79 80 DPRINTF(HWPrefetch, "Adding context %i with stride entries at %p\n", 81 context, it->second); 82 83 StrideEntry** entry = it->second; 84 for (int s = 0; s < pcTableSets; s++) { 85 entry[s] = new StrideEntry[pcTableAssoc]; |
86 } |
87 return entry; |
88} 89 |
90StridePrefetcher::PCTable::~PCTable() { 91 for (auto entry : entries) { |
92 for (int s = 0; s < pcTableSets; s++) { |
93 delete[] entry.second[s]; |
94 } |
95 delete[] entry.second; |
96 } 97} 98 99void 100StridePrefetcher::calculatePrefetch(const PacketPtr &pkt, 101 std::vector<Addr> &addresses) 102{ 103 if (!pkt->req->hasPC()) { 104 DPRINTF(HWPrefetch, "Ignoring request with no PC.\n"); 105 return; 106 } 107 108 // Get required packet info 109 Addr pkt_addr = pkt->getAddr(); 110 Addr pc = pkt->req->getPC(); 111 bool is_secure = pkt->isSecure(); 112 MasterID master_id = useMasterId ? pkt->req->masterId() : 0; 113 |
114 // Lookup pc-based information 115 StrideEntry *entry; 116 117 if(pcTableHit(pc, is_secure, master_id, entry)) { 118 // Hit in table 119 int new_stride = pkt_addr - entry->lastAddr; 120 bool stride_match = (new_stride == entry->stride); 121 --- 98 unchanged lines hidden --- |