Merge zizzer:/z/m5/Bitkeeper/newmem

into  zazzer.eecs.umich.edu:/z/rdreslin/m5bk/newmem

--HG--
extra : convert_revision : 6eefb4a3ee472f2f2c86ed823c70fc9e5625818f

1 files changed, 117 insertions, 0 deletions

diff --git a/src/mem/cache/prefetch/base_prefetcher.hh b/src/mem/cache/prefetch/base_prefetcher.hh
new file mode 100644
index 000000000..3e4fc89d1
--- /dev/null
+++ b/src/mem/cache/prefetch/base_prefetcher.hh
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2005 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Ron Dreslinski
+ */
+
+/**
+ * @file
+ * Miss and writeback queue declarations.
+ */
+
+#ifndef __MEM_CACHE_PREFETCH_BASE_PREFETCHER_HH__
+#define __MEM_CACHE_PREFETCH_BASE_PREFETCHER_HH__
+
+#include "mem/packet.hh"
+#include <list>
+
+class BaseCache;
+class BasePrefetcher
+{
+  protected:
+
+    /** The Prefetch Queue. */
+    std::list<Packet *> pf;
+
+    // PARAMETERS
+
+    /** The number of MSHRs in the Prefetch Queue. */
+    const int size;
+
+    /** Pointr to the parent cache. */
+    BaseCache* cache;
+
+    /** The block size of the parent cache. */
+    int blkSize;
+
+    /** Do we prefetch across page boundaries. */
+    bool pageStop;
+
+    /** Do we remove prefetches with later times than a new miss.*/
+    bool serialSquash;
+
+    /** Do we check if it is in the cache when inserting into buffer,
+        or removing.*/
+    bool cacheCheckPush;
+
+    /** Do we prefetch on only data reads, or on inst reads as well. */
+    bool only_data;
+
+  public:
+
+    Stats::Scalar<> pfIdentified;
+    Stats::Scalar<> pfMSHRHit;
+    Stats::Scalar<> pfCacheHit;
+    Stats::Scalar<> pfBufferHit;
+    Stats::Scalar<> pfRemovedFull;
+    Stats::Scalar<> pfRemovedMSHR;
+    Stats::Scalar<> pfIssued;
+    Stats::Scalar<> pfSpanPage;
+    Stats::Scalar<> pfSquashed;
+
+    void regStats(const std::string &name);
+
+  public:
+    BasePrefetcher(int numMSHRS, bool pageStop, bool serialSquash,
+                   bool cacheCheckPush, bool onlyData);
+
+    virtual ~BasePrefetcher() {}
+
+    void setCache(BaseCache *_cache);
+
+    void handleMiss(Packet * &pkt, Tick time);
+
+    Packet * getPacket();
+
+    bool havePending()
+    {
+        return !pf.empty();
+    }
+
+    virtual void calculatePrefetch(Packet * &pkt,
+                                   std::list<Addr> &addresses,
+                                   std::list<Tick> &delays) = 0;
+
+    virtual bool inCache(Packet * &pkt) = 0;
+
+    virtual bool inMissQueue(Addr address, int asid) = 0;
+
+    std::list<Packet *>::iterator inPrefetch(Addr address);
+};
+
+
+#endif //__MEM_CACHE_PREFETCH_BASE_PREFETCHER_HH__