1/* |
2 * Copyright (c) 2014-2015 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 --- 35 unchanged lines hidden (view full) --- 46#include "params/QueuedPrefetcher.hh" 47 48class QueuedPrefetcher : public BasePrefetcher 49{ 50 protected: 51 struct DeferredPacket { 52 Tick tick; 53 PacketPtr pkt; |
54 int32_t priority; 55 DeferredPacket(Tick t, PacketPtr p, int32_t pr) : tick(t), pkt(p), 56 priority(pr) {} 57 bool operator>(const DeferredPacket& that) const 58 { 59 return priority > that.priority; 60 } 61 bool operator<(const DeferredPacket& that) const 62 { 63 return priority < that.priority; 64 } 65 bool operator<=(const DeferredPacket& that) const 66 { 67 return !(*this > that); 68 } |
69 }; |
70 using AddrPriority = std::pair<Addr, int32_t>; |
71 72 std::list<DeferredPacket> pfq; 73 74 // PARAMETERS 75 76 /** Maximum size of the prefetch queue */ 77 const unsigned queueSize; 78 --- 7 unchanged lines hidden (view full) --- 86 const bool queueFilter; 87 88 /** Snoop the cache before generating prefetch (cheating basically) */ 89 const bool cacheSnoop; 90 91 /** Tag prefetch with PC of generating access? */ 92 const bool tagPrefetch; 93 |
94 using const_iterator = std::list<DeferredPacket>::const_iterator; 95 std::list<DeferredPacket>::const_iterator inPrefetch(Addr address, 96 bool is_secure) const; 97 using iterator = std::list<DeferredPacket>::iterator; 98 std::list<DeferredPacket>::iterator inPrefetch(Addr address, 99 bool is_secure); |
100 101 // STATS 102 Stats::Scalar pfIdentified; 103 Stats::Scalar pfBufferHit; 104 Stats::Scalar pfInCache; 105 Stats::Scalar pfRemovedFull; 106 Stats::Scalar pfSpanPage; 107 108 public: 109 QueuedPrefetcher(const QueuedPrefetcherParams *p); 110 virtual ~QueuedPrefetcher(); 111 112 Tick notify(const PacketPtr &pkt); |
113 PacketPtr insert(AddrPriority& info, bool is_secure); |
114 115 // Note: This should really be pure virtual, but doesnt go well with params 116 virtual void calculatePrefetch(const PacketPtr &pkt, |
117 std::vector<AddrPriority> &addresses) = 0; |
118 PacketPtr getPacket(); 119 120 Tick nextPrefetchReadyTime() const 121 { 122 return pfq.empty() ? MaxTick : pfq.front().tick; 123 } 124 125 void regStats(); 126}; 127 128#endif //__MEM_CACHE_PREFETCH_QUEUED_HH__ 129 |