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diff --git a/src/kern/kernel_stats.hh b/src/kern/kernel_stats.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
+ *          Nathan Binkert
+ */
+
+#ifndef __KERNEL_STATS_HH__
+#define __KERNEL_STATS_HH__
+
+#include <string>
+
+#include "cpu/static_inst.hh"
+#include "sim/serialize.hh"
+
+class BaseCPU;
+class ThreadContext;
+class FnEvent;
+// What does kernel stats expect is included?
+class System;
+
+namespace Kernel {
+
+class Statistics : public Serializable
+{
+  protected:
+    std::string myname;
+
+  protected:
+    Stats::Scalar<> _arm;
+    Stats::Scalar<> _quiesce;
+    Stats::Scalar<> _hwrei;
+
+    Stats::Vector<> _iplCount;
+    Stats::Vector<> _iplGood;
+    Stats::Vector<> _iplTicks;
+    Stats::Formula _iplUsed;
+
+    Stats::Vector<> _syscall;
+//    Stats::Vector<> _faults;
+
+  private:
+    int iplLast;
+    Tick iplLastTick;
+
+  public:
+    Statistics(System *system);
+    virtual ~Statistics() {}
+
+    const std::string name() const { return myname; }
+    void regStats(const std::string &name);
+
+  public:
+    void arm() { _arm++; }
+    void quiesce() { _quiesce++; }
+    void swpipl(int ipl);
+
+  public:
+    virtual void serialize(std::ostream &os);
+    virtual void unserialize(Checkpoint *cp, const std::string &section);
+};
+
+/* end namespace Kernel */ }
+
+#endif // __KERNEL_STATS_HH__