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diff --git a/device/conf.h b/device/conf.h
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+/* 
+ * Mach Operating System
+ * Copyright (c) 1993,1991,1990,1989 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.
+ */
+/*
+ *	Author: David B. Golub, Carnegie Mellon University
+ *	Date: 	8/88
+ */
+
+#ifndef	_DEVICE_CONF_H_
+#define	_DEVICE_CONF_H_
+
+#include <mach/machine/vm_types.h>
+
+/*
+ * Operations list for major device types.
+ */
+struct dev_ops {
+	char *    	d_name;		/* name for major device */
+	int		(*d_open)();	/* open device */
+	int		(*d_close)();	/* close device */
+	int		(*d_read)();	/* read */
+	int		(*d_write)();	/* write */
+	int		(*d_getstat)();	/* get status/control */
+	int		(*d_setstat)();	/* set status/control */
+	vm_offset_t	(*d_mmap)();	/* map memory */
+	int		(*d_async_in)();/* asynchronous input setup */
+	int		(*d_reset)();	/* reset device */
+	int		(*d_port_death)();
+					/* clean up reply ports */
+	int		d_subdev;	/* number of sub-devices per
+					   unit */
+	int		(*d_dev_info)(); /* driver info for kernel */
+};
+typedef struct dev_ops *dev_ops_t;
+
+/*
+ * Routines for null entries.
+ */
+extern int	nulldev();		/* no operation - OK */
+extern int	nodev();		/* no operation - error */
+extern vm_offset_t nomap();		/* no operation - error */
+
+/*
+ * Flavor constants for d_dev_info routine
+ */
+#define D_INFO_BLOCK_SIZE	1
+
+/*
+ * Head of list of attached devices
+ */
+extern struct dev_ops	dev_name_list[];
+extern int		dev_name_count;
+
+/*
+ * Macro to search device list
+ */
+#define	dev_search(dp)	\
+	for (dp = dev_name_list; \
+	     dp < &dev_name_list[dev_name_count]; \
+	     dp++)
+
+/*
+ * Indirection vectors for certain devices.
+ */
+struct dev_indirect {
+	char *		d_name;		/* name for device */
+	dev_ops_t	d_ops;		/* operations (major device) */
+	int		d_unit;		/* and unit number */
+};
+typedef struct dev_indirect	*dev_indirect_t;
+
+/*
+ * List of indirect devices.
+ */
+extern struct dev_indirect	dev_indirect_list[];
+extern int			dev_indirect_count;
+
+/*
+ * Macro to search indirect list
+ */
+#define	dev_indirect_search(di) \
+	for (di = dev_indirect_list; \
+	     di < &dev_indirect_list[dev_indirect_count]; \
+	     di++)
+
+/*
+ * Exported routine to set indirection.
+ */
+extern void	dev_set_indirect();
+
+#endif	/* _DEVICE_CONF_H_ */
+