Was having difficulty with merging the cache, reverted to an early version and will add back in the patches to make it work soon.

src/mem/cache/prefetch/tagged_prefetcher_impl.hh:
    Trying to merge
src/mem/cache/base_cache.cc:
src/mem/cache/base_cache.hh:
src/mem/cache/cache.cc:
src/mem/cache/cache.hh:
src/mem/cache/cache_blk.hh:
src/mem/cache/cache_builder.cc:
src/mem/cache/cache_impl.hh:
src/mem/cache/coherence/coherence_protocol.cc:
src/mem/cache/coherence/coherence_protocol.hh:
src/mem/cache/coherence/simple_coherence.hh:
src/mem/cache/coherence/uni_coherence.cc:
src/mem/cache/coherence/uni_coherence.hh:
src/mem/cache/miss/blocking_buffer.cc:
src/mem/cache/miss/blocking_buffer.hh:
src/mem/cache/miss/miss_queue.cc:
src/mem/cache/miss/miss_queue.hh:
src/mem/cache/miss/mshr.cc:
src/mem/cache/miss/mshr.hh:
src/mem/cache/miss/mshr_queue.cc:
src/mem/cache/miss/mshr_queue.hh:
src/mem/cache/prefetch/base_prefetcher.cc:
src/mem/cache/prefetch/base_prefetcher.hh:
src/mem/cache/prefetch/ghb_prefetcher.cc:
src/mem/cache/prefetch/ghb_prefetcher.hh:
src/mem/cache/prefetch/stride_prefetcher.cc:
src/mem/cache/prefetch/stride_prefetcher.hh:
src/mem/cache/prefetch/tagged_prefetcher.hh:
src/mem/cache/tags/base_tags.cc:
src/mem/cache/tags/base_tags.hh:
src/mem/cache/tags/fa_lru.cc:
src/mem/cache/tags/fa_lru.hh:
src/mem/cache/tags/iic.cc:
src/mem/cache/tags/iic.hh:
src/mem/cache/tags/lru.cc:
src/mem/cache/tags/lru.hh:
src/mem/cache/tags/repl/gen.cc:
src/mem/cache/tags/repl/gen.hh:
src/mem/cache/tags/repl/repl.cc:
src/mem/cache/tags/repl/repl.hh:
src/mem/cache/tags/split.cc:
src/mem/cache/tags/split.hh:
src/mem/cache/tags/split_blk.hh:
src/mem/cache/tags/split_lifo.cc:
src/mem/cache/tags/split_lifo.hh:
src/mem/cache/tags/split_lru.cc:
src/mem/cache/tags/split_lru.hh:
    Pulling an early version of the cache into the tree due to merging issues.  Will apply patches and push.

--HG--
extra : convert_revision : 3276e5fb9a6272681a1690babf2b586dd0e1f380

1 files changed, 114 insertions, 0 deletions

diff --git a/src/mem/cache/prefetch/ghb_prefetcher.hh b/src/mem/cache/prefetch/ghb_prefetcher.hh
new file mode 100644
index 000000000..f25ebe166
--- /dev/null
+++ b/src/mem/cache/prefetch/ghb_prefetcher.hh
@@ -0,0 +1,114 @@
+/*
+ * 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
+ * Describes a ghb prefetcher based on template policies.
+ */
+
+#ifndef __MEM_CACHE_PREFETCH_GHB_PREFETCHER_HH__
+#define __MEM_CACHE_PREFETCH_GHB_PREFETCHER_HH__
+
+#include "base/misc.hh" // fatal, panic, and warn
+
+#include "mem/cache/prefetch/prefetcher.hh"
+
+/**
+ * A template-policy based cache. The behavior of the cache can be altered by
+ * supplying different template policies. TagStore handles all tag and data
+ * storage @sa TagStore. Buffering handles all misses and writes/writebacks
+ * @sa MissQueue. Coherence handles all coherence policy details @sa
+ * UniCoherence, SimpleMultiCoherence.
+ */
+template <class TagStore, class Buffering>
+class GHBPrefetcher : public Prefetcher<TagStore, Buffering>
+{
+  protected:
+
+    Buffering* mq;
+    TagStore* tags;
+
+    Addr second_last_miss_addr[64/*MAX_CPUS*/];
+    Addr last_miss_addr[64/*MAX_CPUS*/];
+
+    Tick latency;
+    int degree;
+    bool useCPUId;
+
+  public:
+
+    GHBPrefetcher(int size, bool pageStop, bool serialSquash,
+                  bool cacheCheckPush, bool onlyData,
+                  Tick latency, int degree, bool useCPUId)
+        :Prefetcher<TagStore, Buffering>(size, pageStop, serialSquash,
+                                         cacheCheckPush, onlyData),
+         latency(latency), degree(degree), useCPUId(useCPUId)
+    {
+    }
+
+    ~GHBPrefetcher() {}
+
+    void calculatePrefetch(Packet * &pkt, std::list<Addr> &addresses,
+                           std::list<Tick> &delays)
+    {
+        Addr blkAddr = pkt->paddr & ~(Addr)(this->blkSize-1);
+        int cpuID = pkt->cpu_num;
+        if (!useCPUId) cpuID = 0;
+
+
+        int new_stride = blkAddr - last_miss_addr[cpuID];
+        int old_stride = last_miss_addr[cpuID] -
+                         second_last_miss_addr[cpuID];
+
+        second_last_miss_addr[cpuID] = last_miss_addr[cpuID];
+        last_miss_addr[cpuID] = blkAddr;
+
+        if (new_stride == old_stride) {
+            for (int d=1; d <= degree; d++) {
+                Addr newAddr = blkAddr + d * new_stride;
+                if (this->pageStop &&
+                    (blkAddr & ~(TheISA::VMPageSize - 1)) !=
+                    (newAddr & ~(TheISA::VMPageSize - 1)))
+                {
+                    //Spanned the page, so now stop
+                    this->pfSpanPage += degree - d + 1;
+                    return;
+                }
+                else
+                {
+                    addresses.push_back(newAddr);
+                    delays.push_back(latency);
+                }
+            }
+        }
+    }
+};
+
+#endif // __MEM_CACHE_PREFETCH_GHB_PREFETCHER_HH__