sys/platform/pc64/include/bootinfo.h

   1 /*-
   2  * Copyright (C) 1994 by Rodney W. Grimes, Milwaukie, Oregon  97222
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer as
  10  *    the first lines of this file unmodified.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Rodney W. Grimes.
  17  * 4. The name of the author may not be used to endorse or promote products
  18  *    derived from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY RODNEY W. GRIMES ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL RODNEY W. GRIMES BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $FreeBSD: src/sys/i386/include/bootinfo.h,v 1.14 1999/12/29 04:32:57 peter Exp $
  33  * $DragonFly: src/sys/platform/pc64/include/bootinfo.h,v 1.1 2007/09/23 04:42:07 yanyh Exp $
  34  */
  35
  36 #ifndef _MACHINE_BOOTINFO_H_
  37 #define _MACHINE_BOOTINFO_H_
  38
  39 /* Only change the version number if you break compatibility. */
  40 #define BOOTINFO_VERSION        1
  41
  42 #define N_BIOS_GEOM             8
  43
  44 /*
  45  * A zero bootinfo field often means that there is no info available.
  46  * Flags are used to indicate the validity of fields where zero is a
  47  * normal value.
  48  */
  49 struct bootinfo {
  50         u_int32_t       bi_version;
  51         u_int32_t       bi_kernelname;          /* represents a char * */
  52         u_int32_t       bi_nfs_diskless;        /* struct nfs_diskless * */
  53                                 /* End of fields that are always present. */
  54 #define bi_endcommon    bi_n_bios_used
  55         u_int32_t       bi_n_bios_used;
  56         u_int32_t       bi_bios_geom[N_BIOS_GEOM];
  57         u_int32_t       bi_size;
  58         u_int8_t        bi_memsizes_valid;
  59         u_int8_t        bi_bios_dev;            /* bootdev BIOS unit number */
  60         u_int8_t        bi_pad[2];
  61         u_int32_t       bi_basemem;
  62         u_int32_t       bi_extmem;
  63         u_int32_t       bi_symtab;              /* struct symtab * */
  64         u_int32_t       bi_esymtab;             /* struct symtab * */
  65                                 /* Items below only from advanced bootloader */
  66         u_int32_t       bi_kernend;             /* end of kernel space */
  67         u_int32_t       bi_envp;                /* environment */
  68         u_int32_t       bi_modulep;             /* preloaded modules */
  69 };
  70
  71 #ifdef _KERNEL
  72 extern struct bootinfo  bootinfo;
  73 #endif
  74
  75 /*
  76  * Constants for converting boot-style device number to type,
  77  * adaptor (uba, mba, etc), unit number and partition number.
  78  * Type (== major device number) is in the low byte
  79  * for backward compatibility.  Except for that of the "magic
  80  * number", each mask applies to the shifted value.
  81  * Format:
  82  *       (4)   (8)   (4)  (8)     (8)
  83  *      --------------------------------
  84  *      |MA | SLICE | UN| PART  | TYPE |
  85  *      --------------------------------
  86  */
  87 #define B_SLICESHIFT            20
  88 #define B_SLICEMASK             0xff
  89 #define B_SLICE(val)            (((val)>>B_SLICESHIFT) & B_SLICEMASK)
  90 #define B_UNITSHIFT             16
  91 #define B_UNITMASK              0xf
  92 #define B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
  93 #define B_PARTITIONSHIFT        8
  94 #define B_PARTITIONMASK         0xff
  95 #define B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
  96 #define B_TYPESHIFT             0
  97 #define B_TYPEMASK              0xff
  98 #define B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
  99
 100 #define B_MAGICMASK     0xf0000000
 101 #define B_DEVMAGIC      0xa0000000
 102
 103 #define MAKEBOOTDEV(type, slice, unit, partition) \
 104         (((type) << B_TYPESHIFT) | ((slice) << B_SLICESHIFT) | \
 105         ((unit) << B_UNITSHIFT) | ((partition) << B_PARTITIONSHIFT) | \
 106         B_DEVMAGIC)
 107
 108 #define BASE_SLICE              2
 109 #define COMPATIBILITY_SLICE     0
 110 #define MAX_SLICES              16
 111 #define WHOLE_DISK_SLICE        1
 112
 113 #endif  /* !_MACHINE_BOOTINFO_H_ */