base.hh (13422:4ec52da74cd5) base.hh (13551:f352df8e2863)
1/*
2 * Copyright (c) 2013-2014 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

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73 void notify(const PacketPtr &pkt) override;
74 protected:
75 BasePrefetcher &parent;
76 };
77
78 std::vector<PrefetchListener *> listeners;
79 protected:
80
1/*
2 * Copyright (c) 2013-2014 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

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

73 void notify(const PacketPtr &pkt) override;
74 protected:
75 BasePrefetcher &parent;
76 };
77
78 std::vector<PrefetchListener *> listeners;
79 protected:
80
81 /**
82 * Class containing the information needed by the prefetch to train and
83 * generate new prefetch requests.
84 */
85 class PrefetchInfo {
86 /** The address. */
87 Addr address;
88 /** The program counter that generated this address. */
89 Addr pc;
90 /** The requestor ID that generated this address. */
91 MasterID masterId;
92 /** Validity bit for the PC of this address. */
93 bool validPC;
94 /** Whether this address targets the secure memory space. */
95 bool secure;
96
97 public:
98 /**
99 * Obtains the address value of this Prefetcher address.
100 * @return the addres value.
101 */
102 Addr getAddr() const
103 {
104 return address;
105 }
106
107 /**
108 * Returns true if the address targets the secure memory space.
109 * @return true if the address targets the secure memory space.
110 */
111 bool isSecure() const
112 {
113 return secure;
114 }
115
116 /**
117 * Returns the program counter that generated this request.
118 * @return the pc value
119 */
120 Addr getPC() const
121 {
122 assert(hasPC());
123 return pc;
124 }
125
126 /**
127 * Returns true if the associated program counter is valid
128 * @return true if the program counter has a valid value
129 */
130 bool hasPC() const
131 {
132 return validPC;
133 }
134
135 /**
136 * Gets the requestor ID that generated this address
137 * @return the requestor ID that generated this address
138 */
139 MasterID getMasterId() const
140 {
141 return masterId;
142 }
143
144 /**
145 * Check for equality
146 * @param pfi PrefetchInfo to compare against
147 * @return True if this object and the provided one are equal
148 */
149 bool sameAddr(PrefetchInfo const &pfi) const
150 {
151 return this->getAddr() == pfi.getAddr() &&
152 this->isSecure() == pfi.isSecure();
153 }
154
155 /**
156 * Constructs a PrefetchInfo using a PacketPtr.
157 * @param pkt PacketPtr used to generate the PrefetchInfo
158 * @param addr the address value of the new object
159 */
160 PrefetchInfo(PacketPtr pkt, Addr addr);
161
162 /**
163 * Constructs a PrefetchInfo using a new address value and
164 * another PrefetchInfo as a reference.
165 * @param pfi PrefetchInfo used to generate this new object
166 * @param addr the address value of the new object
167 */
168 PrefetchInfo(PrefetchInfo const &pfi, Addr addr);
169 };
170
81 // PARAMETERS
82
83 /** Pointr to the parent cache. */
84 BaseCache* cache;
85
86 /** The block size of the parent cache. */
87 unsigned blkSize;
88

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107 /** Request id for prefetches */
108 const MasterID masterId;
109
110 const Addr pageBytes;
111
112 /** Prefetch on every access, not just misses */
113 const bool prefetchOnAccess;
114
171 // PARAMETERS
172
173 /** Pointr to the parent cache. */
174 BaseCache* cache;
175
176 /** The block size of the parent cache. */
177 unsigned blkSize;
178

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197 /** Request id for prefetches */
198 const MasterID masterId;
199
200 const Addr pageBytes;
201
202 /** Prefetch on every access, not just misses */
203 const bool prefetchOnAccess;
204
205 /** Use Virtual Addresses for prefetching */
206 const bool useVirtualAddresses;
207
115 /** Determine if this access should be observed */
116 bool observeAccess(const PacketPtr &pkt) const;
117
118 /** Determine if address is in cache */
119 bool inCache(Addr addr, bool is_secure) const;
120
121 /** Determine if address is in cache miss queue */
122 bool inMissQueue(Addr addr, bool is_secure) const;

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129 Addr blockIndex(Addr a) const;
130 /** Determine the address of the page in which a lays */
131 Addr pageAddress(Addr a) const;
132 /** Determine the page-offset of a */
133 Addr pageOffset(Addr a) const;
134 /** Build the address of the i-th block inside the page */
135 Addr pageIthBlockAddress(Addr page, uint32_t i) const;
136
208 /** Determine if this access should be observed */
209 bool observeAccess(const PacketPtr &pkt) const;
210
211 /** Determine if address is in cache */
212 bool inCache(Addr addr, bool is_secure) const;
213
214 /** Determine if address is in cache miss queue */
215 bool inMissQueue(Addr addr, bool is_secure) const;

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222 Addr blockIndex(Addr a) const;
223 /** Determine the address of the page in which a lays */
224 Addr pageAddress(Addr a) const;
225 /** Determine the page-offset of a */
226 Addr pageOffset(Addr a) const;
227 /** Build the address of the i-th block inside the page */
228 Addr pageIthBlockAddress(Addr page, uint32_t i) const;
229
137
138 Stats::Scalar pfIssued;
139
140 public:
141
142 BasePrefetcher(const BasePrefetcherParams *p);
143
144 virtual ~BasePrefetcher() {}
145
146 void setCache(BaseCache *_cache);
147
148 /**
149 * Notify prefetcher of cache access (may be any access or just
150 * misses, depending on cache parameters.)
151 */
230 Stats::Scalar pfIssued;
231
232 public:
233
234 BasePrefetcher(const BasePrefetcherParams *p);
235
236 virtual ~BasePrefetcher() {}
237
238 void setCache(BaseCache *_cache);
239
240 /**
241 * Notify prefetcher of cache access (may be any access or just
242 * misses, depending on cache parameters.)
243 */
152 virtual void notify(const PacketPtr &pkt) = 0;
244 virtual void notify(const PacketPtr &pkt, const PrefetchInfo &pfi) = 0;
153
154 virtual PacketPtr getPacket() = 0;
155
156 virtual Tick nextPrefetchReadyTime() const = 0;
157
158 /**
159 * Register local statistics.
160 */

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246 virtual PacketPtr getPacket() = 0;
247
248 virtual Tick nextPrefetchReadyTime() const = 0;
249
250 /**
251 * Register local statistics.
252 */

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