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diff --git a/arch/tile/include/asm/memprof.h b/arch/tile/include/asm/memprof.h
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+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, version 2.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for
+ * more details.
+ *
+ * The hypervisor's memory controller profiling infrastructure allows
+ * the programmer to find out what fraction of the available memory
+ * bandwidth is being consumed at each memory controller. The
+ * profiler provides start, stop, and clear operations to allows
+ * profiling over a specific time window, as well as an interface for
+ * reading the most recent profile values.
+ *
+ * This header declares IOCTL codes necessary to control memprof.
+ */
+#ifndef _ASM_TILE_MEMPROF_H
+#define _ASM_TILE_MEMPROF_H
+
+#include <linux/ioctl.h>
+
+#define MEMPROF_IOCTL_TYPE 0xB4
+#define MEMPROF_IOCTL_START _IO(MEMPROF_IOCTL_TYPE, 0)
+#define MEMPROF_IOCTL_STOP _IO(MEMPROF_IOCTL_TYPE, 1)
+#define MEMPROF_IOCTL_CLEAR _IO(MEMPROF_IOCTL_TYPE, 2)
+
+#endif /* _ASM_TILE_MEMPROF_H */