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 * $FreeBSD$
35 */
36
37 #ifndef _MACHINE_BOOTINFO_H_
38 #define _MACHINE_BOOTINFO_H_
39
40 /* Only change the version number if you break compatibility. */
41 #define BOOTINFO_VERSION 1
42
43 #define _WAS_N_BIOS_GEOM 8
44
45 /*
46 * A zero bootinfo field often means that there is no info available.
47 * Assumes booting with a boot loader from FreeBSD 2.1 or newer and
48 * that bi_size is always valid when bi_version == 1.
49 */
50 struct bootinfo {
51 u_int32_t bi_version; /* Must be 1 */
52 u_int32_t bi_kernelname; /* represents a char * */
53 u_int32_t bi_nfs_diskless; /* struct nfs_diskless * */
54 u_int32_t _was_bi_n_bios_used;
55 u_int32_t _was_bi_bios_geom[_WAS_N_BIOS_GEOM];
56 u_int32_t bi_size;
57 u_int8_t bi_memsizes_valid;
58 u_int8_t bi_bios_dev; /* bootdev BIOS unit number (bootX -> loader only) */
59 u_int8_t bi_pad[2];
60 u_int32_t bi_basemem;
61 u_int32_t bi_extmem;
62 u_int32_t bi_symtab; /* struct symtab * */
63 u_int32_t bi_esymtab; /* struct symtab * */
64 /* Items below only from advanced bootloader */
65 u_int32_t bi_kernend; /* end of kernel space */
66 u_int32_t bi_envp; /* environment */
67 u_int32_t bi_modulep; /* preloaded modules */
68 };
69
70 #ifdef _KERNEL
71 extern struct bootinfo bootinfo;
72 #endif
73
74 /*
75 * Constants for converting boot-style device number to type,
76 * adaptor (uba, mba, etc), unit number and partition number.
77 * Type (== major device number) is in the low byte
78 * for backward compatibility. Except for that of the "magic
79 * number", each mask applies to the shifted value.
80 * Format:
81 * (4) (8) (4) (8) (8)
82 * --------------------------------
83 * |MA | SLICE | UN| PART | TYPE |
84 * --------------------------------
85 */
86 #define B_SLICESHIFT 20
87 #define B_SLICEMASK 0xff
88 #define B_SLICE(val) (((val)>>B_SLICESHIFT) & B_SLICEMASK)
89 #define B_UNITSHIFT 16
90 #define B_UNITMASK 0xf
91 #define B_UNIT(val) (((val) >> B_UNITSHIFT) & B_UNITMASK)
92 #define B_PARTITIONSHIFT 8
93 #define B_PARTITIONMASK 0xff
94 #define B_PARTITION(val) (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
95 #define B_TYPESHIFT 0
96 #define B_TYPEMASK 0xff
97 #define B_TYPE(val) (((val) >> B_TYPESHIFT) & B_TYPEMASK)
98
99 #define B_MAGICMASK 0xf0000000
100 #define B_DEVMAGIC 0xa0000000
101
102 #define MAKEBOOTDEV(type, slice, unit, partition) \
103 (((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
104 ((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
105 B_DEVMAGIC)
106
107 #define BASE_SLICE 2
108 #define COMPATIBILITY_SLICE 0
109 #define MAX_SLICES 32
110 #define WHOLE_DISK_SLICE 1
111
112 #endif /* !_MACHINE_BOOTINFO_H_ */
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