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diff --git a/src/sim/host.hh b/src/sim/host.hh
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+/*
+ * Copyright (c) 2003-2005 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: Nathan Binkert
+ */
+
+/**
+ * @file
+ * Defines host-dependent types:
+ * Counter, Tick, and (indirectly) {int,uint}{8,16,32,64}_t.
+ */
+
+#ifndef __HOST_HH__
+#define __HOST_HH__
+
+#include <inttypes.h>
+
+/** uint64_t constant */
+#define ULL(N)		((uint64_t)N##ULL)
+/** int64_t constant */
+#define LL(N)		(((int64_t)N##LL)
+
+/** Statistics counter type.  Not much excuse for not using a 64-bit
+ * integer here, but if you're desperate and only run short
+ * simulations you could make this 32 bits.
+ */
+typedef int64_t Counter;
+
+/**
+ * Clock cycle count type.
+ * @note using an unsigned breaks the cache.
+ */
+typedef int64_t Tick;
+
+const Tick MaxTick = (1LL << 62);
+
+/**
+ * Address type
+ * This will probably be moved somewhere else in the near future.
+ * This should be at least as big as the biggest address width in use
+ * in the system, which will probably be 64 bits.
+ */
+typedef uint64_t Addr;
+
+const Addr MaxAddr = (Addr)-1;
+
+#endif // __HOST_H__