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_ */ 113