The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/i386/include/bootinfo.h

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    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: head/sys/i386/include/bootinfo.h 326260 2017-11-27 15:08:52Z pfg $
   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 N_BIOS_GEOM             8
   44 
   45 /*
   46  * A zero bootinfo field often means that there is no info available.
   47  * Flags are used to indicate the validity of fields where zero is a
   48  * normal value.
   49  */
   50 struct bootinfo {
   51         u_int32_t       bi_version;
   52         u_int32_t       bi_kernelname;          /* represents a char * */
   53         u_int32_t       bi_nfs_diskless;        /* struct nfs_diskless * */
   54                                 /* End of fields that are always present. */
   55 #define bi_endcommon    bi_n_bios_used
   56         u_int32_t       bi_n_bios_used;
   57         u_int32_t       bi_bios_geom[N_BIOS_GEOM];
   58         u_int32_t       bi_size;
   59         u_int8_t        bi_memsizes_valid;
   60         u_int8_t        bi_bios_dev;            /* bootdev BIOS unit number */
   61         u_int8_t        bi_pad[2];
   62         u_int32_t       bi_basemem;
   63         u_int32_t       bi_extmem;
   64         u_int32_t       bi_symtab;              /* struct symtab * */
   65         u_int32_t       bi_esymtab;             /* struct symtab * */
   66                                 /* Items below only from advanced bootloader */
   67         u_int32_t       bi_kernend;             /* end of kernel space */
   68         u_int32_t       bi_envp;                /* environment */
   69         u_int32_t       bi_modulep;             /* preloaded modules */
   70         uint32_t        bi_memdesc_version;     /* EFI memory desc version */
   71         uint64_t        bi_memdesc_size;        /* sizeof EFI memory desc */
   72         uint64_t        bi_memmap;              /* pa of EFI memory map */
   73         uint64_t        bi_memmap_size;         /* size of EFI memory map */
   74         uint64_t        bi_hcdp;                /* DIG64 HCDP table */
   75         uint64_t        bi_fpswa;               /* FPSWA interface */
   76         uint64_t        bi_systab;              /* pa of EFI system table */
   77 };
   78 
   79 #ifdef _KERNEL
   80 extern struct bootinfo  bootinfo;
   81 #endif
   82 
   83 /*
   84  * Constants for converting boot-style device number to type,
   85  * adaptor (uba, mba, etc), unit number and partition number.
   86  * Type (== major device number) is in the low byte
   87  * for backward compatibility.  Except for that of the "magic
   88  * number", each mask applies to the shifted value.
   89  * Format:
   90  *       (4)   (8)   (4)  (8)     (8)
   91  *      --------------------------------
   92  *      |MA | SLICE | UN| PART  | TYPE |
   93  *      --------------------------------
   94  */
   95 #define B_SLICESHIFT            20
   96 #define B_SLICEMASK             0xff
   97 #define B_SLICE(val)            (((val)>>B_SLICESHIFT) & B_SLICEMASK)
   98 #define B_UNITSHIFT             16
   99 #define B_UNITMASK              0xf
  100 #define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
  101 #define B_PARTITIONSHIFT        8
  102 #define B_PARTITIONMASK         0xff
  103 #define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
  104 #define B_TYPESHIFT             0
  105 #define B_TYPEMASK              0xff
  106 #define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
  107 
  108 #define B_MAGICMASK     0xf0000000
  109 #define B_DEVMAGIC      0xa0000000
  110 
  111 #define MAKEBOOTDEV(type, slice, unit, partition) \
  112         (((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
  113         ((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
  114         B_DEVMAGIC)
  115 
  116 #define BASE_SLICE              2
  117 #define COMPATIBILITY_SLICE     0
  118 #define MAX_SLICES              32
  119 #define WHOLE_DISK_SLICE        1
  120 
  121 #endif  /* !_MACHINE_BOOTINFO_H_ */

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