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diff --git a/include/mach/boot.h b/include/mach/boot.h
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+/* 
+ * Copyright (c) 1994 The University of Utah and
+ * the Computer Systems Laboratory at the University of Utah (CSL).
+ * All rights reserved.
+ *
+ * Permission to use, copy, modify and distribute this software is hereby
+ * granted provided that (1) source code retains these copyright, permission,
+ * and disclaimer notices, and (2) redistributions including binaries
+ * reproduce the notices in supporting documentation, and (3) all advertising
+ * materials mentioning features or use of this software display the following
+ * acknowledgement: ``This product includes software developed by the
+ * Computer Systems Laboratory at the University of Utah.''
+ *
+ * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
+ * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
+ * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * CSL requests users of this software to return to csl-dist@cs.utah.edu any
+ * improvements that they make and grant CSL redistribution rights.
+ *
+ *      Author: Bryan Ford, University of Utah CSL
+ */
+#ifndef _MACH_BOOT_
+#define _MACH_BOOT_
+
+#include <mach/machine/boot.h>
+
+#ifndef ASSEMBLER
+
+#include <mach/machine/vm_types.h>
+
+struct boot_image_info
+{
+	/* First of the chain of boot modules in the boot image.  */
+	struct boot_module *first_bmod;
+
+	/* List of rendezvous points:
+	   starts out 0; and bmods can add nodes as needed.  */
+	struct boot_rendezvous *first_rzv;
+
+	/* These register the total virtual address extent of the boot image.  */
+	vm_offset_t start, end;
+
+	/* Machine-dependent boot information.  */
+	struct machine_boot_image_info mboot;
+};
+
+struct boot_module
+{
+	int magic;
+	int (*init)(struct boot_image_info *bii);
+	vm_offset_t text;
+	vm_offset_t etext;
+	vm_offset_t data;
+	vm_offset_t edata;
+	vm_offset_t bss;
+	vm_offset_t ebss;
+};
+#define BMOD_VALID(bmod) ((bmod)->magic == BMOD_MAGIC)
+#define BMOD_NEXT(bmod) ((struct boot_module*)((bmod)->edata))
+
+struct boot_rendezvous
+{
+	struct boot_rendezvous *next;
+	int code;
+};
+
+#endif !ASSEMBLER
+
+
+/* This is the magic value that must appear in boot_module.magic.  */
+#define BMOD_MAGIC		0x424d4f44	/* 'BMOD' */
+
+
+/* Following are the codes for boot_rendezvous.code.  */
+
+/* This rendezvous is used for choosing a microkernel to start.
+   XX not used yet  */
+#define BRZV_KERNEL	'K'
+
+/* Once the microkernel is fully initialized,
+   it starts one or more bootstrap services...  */
+#define BRZV_BOOTSTRAP	'B'
+
+/* The bootstrap services might need other OS-dependent data,
+   such as initial programs to run, filesystem snapshots, etc.
+   These generic chunks of data are packaged up by the microkernel
+   and provided to the bootstrap services upon request.
+   XX When can they be deallocated?  */
+#define BRZV_DATA	'D'
+
+
+#endif _MACH_BOOT_