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diff --git a/src/mem/cache/tags/split_blk.hh b/src/mem/cache/tags/split_blk.hh
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+/*
+ * Copyright (c) 2004-2005 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: Lisa Hsu
+ */
+
+/**
+ * @file
+ * Declaration of partitioned tag store cache block class.
+ */
+
+#ifndef __SPLIT_BLK_HH__
+#define __SPLIT_BLK_HH__
+
+#include "mem/cache/cache_blk.hh" // base class
+
+/**
+ * Split cache block.
+ */
+class SplitBlk : public CacheBlk {
+  public:
+    /** Has this block been touched? Used to aid calculation of warmup time. */
+    bool isTouched;
+    /** Has this block been used after being brought in? (for LIFO partition) */
+    bool isUsed;
+    /** is this blk a NIC block? (i.e. pktuested by the NIC) */
+    bool isNIC;
+    /** timestamp of the arrival of this block into the cache */
+    Tick ts;
+    /** the previous block in the LIFO partition (brought in before than me) */
+    SplitBlk *prev;
+    /** the next block in the LIFO partition (brought in later than me) */
+    SplitBlk *next;
+    /** which partition this block is in */
+    int part;
+
+    SplitBlk()
+        : isTouched(false), isUsed(false), isNIC(false), ts(0), prev(NULL), next(NULL),
+          part(0)
+    {}
+};
+
+#endif
+