/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon  97222
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer as
 *    the first lines of this file unmodified.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Rodney W. Grimes.
 * 4. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef _MACHINE_BOOTINFO_H_
#define _MACHINE_BOOTINFO_H_

/* Only change the version number if you break compatibility. */
#define BOOTINFO_VERSION        1

#define _WAS_N_BIOS_GEOM        8

/*
 * A zero bootinfo field often means that there is no info available.
 * Assumes booting with a boot loader from FreeBSD 2.1 or newer and
 * that bi_size is always valid when bi_version == 1.
 */
struct bootinfo {
        u_int32_t       bi_version;             /* Must be 1 */
        u_int32_t       bi_kernelname;          /* represents a char * */
        u_int32_t       bi_nfs_diskless;        /* struct nfs_diskless * */
        u_int32_t       _was_bi_n_bios_used;
        u_int32_t       _was_bi_bios_geom[_WAS_N_BIOS_GEOM];
        u_int32_t       bi_size;
        u_int8_t        bi_memsizes_valid;
        u_int8_t        bi_bios_dev;    /* bootdev BIOS unit number (bootX -> loader only) */
        u_int8_t        bi_pad[2];
        u_int32_t       bi_basemem;
        u_int32_t       bi_extmem;
        u_int32_t       bi_symtab;              /* struct symtab * */
        u_int32_t       bi_esymtab;             /* struct symtab * */
                                /* Items below only from advanced bootloader */
        u_int32_t       bi_kernend;             /* end of kernel space */
        u_int32_t       bi_envp;                /* environment */
        u_int32_t       bi_modulep;             /* preloaded modules */
};

#ifdef _KERNEL
extern struct bootinfo  bootinfo;
#endif

/*
 * Constants for converting boot-style device number to type,
 * adaptor (uba, mba, etc), unit number and partition number.
 * Type (== major device number) is in the low byte
 * for backward compatibility.  Except for that of the "magic
 * number", each mask applies to the shifted value.
 * Format:
 *       (4)   (8)   (4)  (8)     (8)
 *      --------------------------------
 *      |MA | SLICE | UN| PART  | TYPE |
 *      --------------------------------
 */
#define B_SLICESHIFT            20
#define B_SLICEMASK             0xff
#define B_SLICE(val)            (((val)>>B_SLICESHIFT) & B_SLICEMASK)
#define B_UNITSHIFT             16
#define B_UNITMASK              0xf
#define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
#define B_PARTITIONSHIFT        8
#define B_PARTITIONMASK         0xff
#define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
#define B_TYPESHIFT             0
#define B_TYPEMASK              0xff
#define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)

#define B_MAGICMASK     0xf0000000
#define B_DEVMAGIC      0xa0000000

#define MAKEBOOTDEV(type, slice, unit, partition) \
        (((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
        ((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
        B_DEVMAGIC)

#define BASE_SLICE              2
#define COMPATIBILITY_SLICE     0
#define MAX_SLICES              32
#define WHOLE_DISK_SLICE        1

#endif  /* !_MACHINE_BOOTINFO_H_ */