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diff --git a/include/mach/processor_info.h b/include/mach/processor_info.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1993,1992,1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+/*
+ *	File:	mach/processor_info.h
+ *	Author:	David L. Black
+ *	Date:	1988
+ *
+ *	Data structure definitions for processor_info, processor_set_info
+ */
+
+#ifndef	_MACH_PROCESSOR_INFO_H_
+#define _MACH_PROCESSOR_INFO_H_
+
+#include <mach/machine.h>
+
+/*
+ *	Generic information structure to allow for expansion.
+ */
+typedef integer_t	*processor_info_t;	/* varying array of int. */
+
+#define PROCESSOR_INFO_MAX	(1024)		/* max array size */
+typedef integer_t	processor_info_data_t[PROCESSOR_INFO_MAX];
+
+
+typedef integer_t	*processor_set_info_t;	/* varying array of int. */
+
+#define PROCESSOR_SET_INFO_MAX	(1024)		/* max array size */
+typedef integer_t	processor_set_info_data_t[PROCESSOR_SET_INFO_MAX];
+
+/*
+ *	Currently defined information.
+ */
+#define	PROCESSOR_BASIC_INFO	1		/* basic information */
+
+struct processor_basic_info {
+	cpu_type_t	cpu_type;	/* type of cpu */
+	cpu_subtype_t	cpu_subtype;	/* subtype of cpu */
+/*boolean_t*/integer_t	running;	/* is processor running */
+	integer_t	slot_num;	/* slot number */
+/*boolean_t*/integer_t	is_master;	/* is this the master processor */
+};
+
+typedef	struct processor_basic_info	processor_basic_info_data_t;
+typedef struct processor_basic_info	*processor_basic_info_t;
+#define PROCESSOR_BASIC_INFO_COUNT \
+		(sizeof(processor_basic_info_data_t)/sizeof(integer_t))
+
+
+#define	PROCESSOR_SET_BASIC_INFO	1	/* basic information */
+
+struct processor_set_basic_info {
+	integer_t	processor_count;	/* How many processors */
+	integer_t	task_count;		/* How many tasks */
+	integer_t	thread_count;		/* How many threads */
+	integer_t	load_average;		/* Scaled */
+	integer_t	mach_factor;		/* Scaled */
+};
+
+/*
+ *	Scaling factor for load_average, mach_factor.
+ */
+#define	LOAD_SCALE	1000		
+
+typedef	struct processor_set_basic_info	processor_set_basic_info_data_t;
+typedef struct processor_set_basic_info	*processor_set_basic_info_t;
+#define PROCESSOR_SET_BASIC_INFO_COUNT \
+		(sizeof(processor_set_basic_info_data_t)/sizeof(integer_t))
+
+#define PROCESSOR_SET_SCHED_INFO	2	/* scheduling info */
+
+struct processor_set_sched_info {
+	integer_t	policies;	/* allowed policies */
+	integer_t	max_priority;	/* max priority for new threads */
+};
+
+typedef	struct processor_set_sched_info	processor_set_sched_info_data_t;
+typedef struct processor_set_sched_info	*processor_set_sched_info_t;
+#define PROCESSOR_SET_SCHED_INFO_COUNT \
+		(sizeof(processor_set_sched_info_data_t)/sizeof(integer_t))
+
+#endif	/* _MACH_PROCESSOR_INFO_H_ */