src/mem/cache/prefetch/tagged_prefetcher.hh

   1 /*
   2  * Copyright (c) 2005 The Regents of The University of Michigan
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met: redistributions of source code must retain the above copyright
   8  * notice, this list of conditions and the following disclaimer;
   9  * redistributions in binary form must reproduce the above copyright
  10  * notice, this list of conditions and the following disclaimer in the
  11  * documentation and/or other materials provided with the distribution;
  12  * neither the name of the copyright holders nor the names of its
  13  * contributors may be used to endorse or promote products derived from
  14  * this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  19  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  20  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * Authors: Ron Dreslinski
  29  */
  30
  31 /**
  32  * @file
  33  * Describes a tagged prefetcher based on template policies.
  34  */
  35
  36 #ifndef __MEM_CACHE_PREFETCH_TAGGED_PREFETCHER_HH__
  37 #define __MEM_CACHE_PREFETCH_TAGGED_PREFETCHER_HH__
  38
  39 #include "mem/cache/prefetch/prefetcher.hh"
  40
  41 /**
  42  * A template-policy based cache. The behavior of the cache can be altered by
  43  * supplying different template policies. TagStore handles all tag and data
  44  * storage @sa TagStore. Buffering handles all misses and writes/writebacks
  45  * @sa MissQueue. Coherence handles all coherence policy details @sa
  46  * UniCoherence, SimpleMultiCoherence.
  47  */
  48 template <class TagStore, class Buffering>
  49 class TaggedPrefetcher : public Prefetcher<TagStore, Buffering>
  50 {
  51   protected:
  52
  53     Buffering* mq;
  54     TagStore* tags;
  55
  56     Tick latency;
  57     int degree;
  58
  59   public:
  60
  61     TaggedPrefetcher(int size, bool pageStop, bool serialSquash,
  62                      bool cacheCheckPush, bool onlyData,
  63                      Tick latency, int degree);
  64
  65     ~TaggedPrefetcher() {}
  66
  67     void calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses,
  68                            std::list<Tick> &delays);
  69 };
  70
  71 #endif // __MEM_CACHE_PREFETCH_TAGGED_PREFETCHER_HH__