1/*-
  2 * SPDX-License-Identifier: BSD-4-Clause
  3 *
  4 * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon  97222
  5 * All rights reserved.
  6 *
  7 * Redistribution and use in source and binary forms, with or without
  8 * modification, are permitted provided that the following conditions
  9 * are met:
 10 * 1. Redistributions of source code must retain the above copyright
 11 *    notice, this list of conditions and the following disclaimer as
 12 *    the first lines of this file unmodified.
 13 * 2. Redistributions in binary form must reproduce the above copyright
 14 *    notice, this list of conditions and the following disclaimer in the
 15 *    documentation and/or other materials provided with the distribution.
 16 * 3. All advertising materials mentioning features or use of this software
 17 *    must display the following acknowledgement:
 18 *	This product includes software developed by Rodney W. Grimes.
 19 * 4. The name of the author may not be used to endorse or promote products
 20 *    derived from this software without specific prior written permission.
 21 *
 22 * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 25 * ARE DISCLAIMED.  IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 32 * SUCH DAMAGE.
 33 */
 34
 35#ifndef	_MACHINE_BOOTINFO_H_
 36#define	_MACHINE_BOOTINFO_H_
 37
 38/* Only change the version number if you break compatibility. */
 39#define	BOOTINFO_VERSION	1
 40
 41#define	_WAS_N_BIOS_GEOM	8
 42
 43/*
 44 * A zero bootinfo field often means that there is no info available.
 45 * Assumes booting with a boot loader from FreeBSD 2.1 or newer and
 46 * that bi_size is always valid when bi_version == 1.
 47 */
 48struct bootinfo {
 49	u_int32_t	bi_version;		/* Must be 1 */
 50	u_int32_t	bi_kernelname;		/* represents a char * */
 51	u_int32_t	bi_nfs_diskless;	/* struct nfs_diskless * */
 52	u_int32_t	_was_bi_n_bios_used;
 53	u_int32_t	_was_bi_bios_geom[_WAS_N_BIOS_GEOM];
 54	u_int32_t	bi_size;
 55	u_int8_t	bi_memsizes_valid;
 56	u_int8_t	bi_bios_dev;	/* bootdev BIOS unit number (bootX -> loader only) */
 57	u_int8_t	bi_pad[2];
 58	u_int32_t	bi_basemem;
 59	u_int32_t	bi_extmem;
 60	u_int32_t	bi_symtab;		/* struct symtab * */
 61	u_int32_t	bi_esymtab;		/* struct symtab * */
 62				/* Items below only from advanced bootloader */
 63	u_int32_t	bi_kernend;		/* end of kernel space */
 64	u_int32_t	bi_envp;		/* environment */
 65	u_int32_t	bi_modulep;		/* preloaded modules */
 66};
 67
 68#ifdef _KERNEL
 69extern struct bootinfo	bootinfo;
 70#endif
 71
 72/*
 73 * Constants for converting boot-style device number to type,
 74 * adaptor (uba, mba, etc), unit number and partition number.
 75 * Type (== major device number) is in the low byte
 76 * for backward compatibility.  Except for that of the "magic
 77 * number", each mask applies to the shifted value.
 78 * Format:
 79 *	 (4)   (8)   (4)  (8)     (8)
 80 *	--------------------------------
 81 *	|MA | SLICE | UN| PART  | TYPE |
 82 *	--------------------------------
 83 */
 84#define B_SLICESHIFT		20
 85#define B_SLICEMASK		0xff
 86#define B_SLICE(val)		(((val)>>B_SLICESHIFT) & B_SLICEMASK)
 87#define B_UNITSHIFT		16
 88#define B_UNITMASK		0xf
 89#define	B_UNIT(val)		(((val) >> B_UNITSHIFT) & B_UNITMASK)
 90#define B_PARTITIONSHIFT	8
 91#define B_PARTITIONMASK		0xff
 92#define	B_PARTITION(val)	(((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
 93#define	B_TYPESHIFT		0
 94#define	B_TYPEMASK		0xff
 95#define	B_TYPE(val)		(((val) >> B_TYPESHIFT) & B_TYPEMASK)
 96
 97#define	B_MAGICMASK	0xf0000000
 98#define	B_DEVMAGIC	0xa0000000
 99
100#define	MAKEBOOTDEV(type, slice, unit, partition) \
101	(((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
102	((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
103	B_DEVMAGIC)
104
105#define	BASE_SLICE		2
106#define	COMPATIBILITY_SLICE	0
107#define	MAX_SLICES		32
108#define	WHOLE_DISK_SLICE	1
109
110#endif	/* !_MACHINE_BOOTINFO_H_ */