The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/sys/bootblock.h

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    1 /*      $NetBSD: bootblock.h,v 1.24.2.1 2004/04/28 05:57:19 jmc Exp $   */
    2 
    3 /*-
    4  * Copyright (c) 2002-2004 The NetBSD Foundation, Inc.
    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.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by the NetBSD
   18  *      Foundation, Inc. and its contributors.
   19  * 4. Neither the name of The NetBSD Foundation nor the names of its
   20  *    contributors may be used to endorse or promote products derived
   21  *    from this software without specific prior written permission.
   22  *
   23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   33  * POSSIBILITY OF SUCH DAMAGE.
   34  */
   35 /*-
   36  * Copyright (C) 1993   Allen K. Briggs, Chris P. Caputo,
   37  *                      Michael L. Finch, Bradley A. Grantham, and
   38  *                      Lawrence A. Kesteloot
   39  * All rights reserved.
   40  *
   41  * Redistribution and use in source and binary forms, with or without
   42  * modification, are permitted provided that the following conditions
   43  * are met:
   44  * 1. Redistributions of source code must retain the above copyright
   45  *    notice, this list of conditions and the following disclaimer.
   46  * 2. Redistributions in binary form must reproduce the above copyright
   47  *    notice, this list of conditions and the following disclaimer in the
   48  *    documentation and/or other materials provided with the distribution.
   49  * 3. All advertising materials mentioning features or use of this software
   50  *    must display the following acknowledgement:
   51  *      This product includes software developed by the Alice Group.
   52  * 4. The names of the Alice Group or any of its members may not be used
   53  *    to endorse or promote products derived from this software without
   54  *    specific prior written permission.
   55  *
   56  * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
   57  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   58  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   59  * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
   60  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   61  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   62  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   63  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   64  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   65  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   66  *
   67  */
   68 /*
   69  * Copyright (c) 1994, 1999 Christopher G. Demetriou
   70  * All rights reserved.
   71  *
   72  * Redistribution and use in source and binary forms, with or without
   73  * modification, are permitted provided that the following conditions
   74  * are met:
   75  * 1. Redistributions of source code must retain the above copyright
   76  *    notice, this list of conditions and the following disclaimer.
   77  * 2. Redistributions in binary form must reproduce the above copyright
   78  *    notice, this list of conditions and the following disclaimer in the
   79  *    documentation and/or other materials provided with the distribution.
   80  * 3. All advertising materials mentioning features or use of this software
   81  *    must display the following acknowledgement:
   82  *      This product includes software developed by Christopher G. Demetriou
   83  *      for the NetBSD Project.
   84  * 4. The name of the author may not be used to endorse or promote products
   85  *    derived from this software without specific prior written permission
   86  *
   87  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   88  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   89  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   90  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   91  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   92  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   93  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   94  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   95  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   96  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   97  */
   98 /*
   99  * Copyright (c) 1994 Rolf Grossmann
  100  * All rights reserved.
  101  *
  102  * Redistribution and use in source and binary forms, with or without
  103  * modification, are permitted provided that the following conditions
  104  * are met:
  105  * 1. Redistributions of source code must retain the above copyright
  106  *    notice, this list of conditions and the following disclaimer.
  107  * 2. Redistributions in binary form must reproduce the above copyright
  108  *    notice, this list of conditions and the following disclaimer in the
  109  *    documentation and/or other materials provided with the distribution.
  110  * 3. All advertising materials mentioning features or use of this software
  111  *    must display the following acknowledgement:
  112  *      This product includes software developed by Rolf Grossmann.
  113  * 4. The name of the author may not be used to endorse or promote products
  114  *    derived from this software without specific prior written permission
  115  *
  116  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  117  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  118  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  119  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  120  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  121  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  122  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  123  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  124  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  125  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  126  */
  127 
  128 #ifndef _SYS_BOOTBLOCK_H
  129 #define _SYS_BOOTBLOCK_H
  130 
  131 #if !defined(__ASSEMBLER__)
  132 #if defined(_KERNEL) || defined(_STANDALONE)
  133 #include <sys/stdint.h>
  134 #else
  135 #include <stdint.h>
  136 #endif
  137 #endif  /* !defined(__ASSEMBLER__) */
  138 
  139 /* ------------------------------------------
  140  * MBR (Master Boot Record) --
  141  *      definitions for systems that use MBRs
  142  */
  143 
  144 /*
  145  * Layout of boot records:
  146  *
  147  *      Byte range      Use     Description
  148  *      ----------      ---     -----------
  149  *
  150  *      0 - 2           FMP     JMP xxx, NOP
  151  *      3 - 10          FP      OEM Name
  152  *
  153  *      11 - 61         FMP     FAT12/16 BPB
  154  *                              Whilst not strictly necessary for MBR,
  155  *                              GRUB reserves this area
  156  *
  157  *      11 - 89         P       FAT32 BPB
  158  *                              (are we ever going to boot off this?)
  159  *
  160  *
  161  *      62 - 217        FMP     Boot code
  162  *
  163  *      90 - 217        P       FAT32 boot code
  164  *
  165  *      218 - 223       M       Win95b/98/me "drive time"
  166  *              http://www.geocities.com/thestarman3/asm/mbr/95BMEMBR.htm#MYST
  167  *                              only changed if all 6 bytes are 0
  168  *
  169  *      224 - 436       FMP     boot code (continued)
  170  *
  171  *      437 - 439       M       WinNT/2K/XP MBR "boot language"
  172  *              http://www.geocities.com/thestarman3/asm/mbr/Win2kmbr.htm
  173  *                              not needed by us
  174  *
  175  *      400 - 439       MP      NetBSD: mbr_bootsel
  176  *
  177  *      440 - 443       M       WinNT/2K/XP Drive Serial Number (NT DSN)
  178  *              http://www.geocities.com/thestarman3/asm/mbr/Win2kmbr.htm
  179  *
  180  *      444 - 445       FMP     bootcode or unused
  181  *                              NetBSD: mbr_bootsel_magic
  182  *
  183  *      446 - 509       M       partition table
  184  *
  185  *      510 - 511       FMP     magic number (0xAA55)
  186  *
  187  *      Use:
  188  *      ----
  189  *      F       Floppy boot sector
  190  *      M       Master Boot Record
  191  *      P       Partition Boot record
  192  *
  193  */
  194 
  195 /*
  196  * MBR (Master Boot Record)
  197  */
  198 #define MBR_BBSECTOR            0       /* MBR relative sector # */
  199 #define MBR_BPB_OFFSET          11      /* offsetof(mbr_sector, mbr_bpb) */
  200 #define MBR_BOOTCODE_OFFSET     90      /* offsetof(mbr_sector, mbr_bootcode) */
  201 #define MBR_BS_OFFSET           400     /* offsetof(mbr_sector, mbr_bootsel) */
  202 #define MBR_BS_OLD_OFFSET       404     /* where mbr_bootsel used to be */
  203 #define MBR_DSN_OFFSET          440     /* offsetof(mbr_sector, mbr_dsn) */
  204 #define MBR_BS_MAGIC_OFFSET     444     /* offsetof(mbr_sector, mbr_bootsel_magic) */
  205 #define MBR_PART_OFFSET         446     /* offsetof(mbr_sector, mbr_part[0]) */
  206 #define MBR_MAGIC_OFFSET        510     /* offsetof(mbr_sector, mbr_magic) */
  207 #define MBR_MAGIC               0xaa55  /* MBR magic number */
  208 #define MBR_BS_MAGIC            0xb5e1  /* mbr_bootsel magic number */
  209 #define MBR_PART_COUNT          4       /* Number of partitions in MBR */
  210 #define MBR_BS_PARTNAMESIZE     8       /* Size of name mbr_bootsel nametab */
  211                                         /* (excluding trailing NUL) */
  212 
  213                 /* values for mbr_partition.mbrp_flag */
  214 #define MBR_PFLAG_ACTIVE        0x80    /* The active partition */
  215 
  216                 /* values for mbr_partition.mbrp_type */
  217 #define MBR_PTYPE_FAT12         0x01    /* 12-bit FAT */
  218 #define MBR_PTYPE_FAT16S        0x04    /* 16-bit FAT, less than 32M */
  219 #define MBR_PTYPE_EXT           0x05    /* extended partition */
  220 #define MBR_PTYPE_FAT16B        0x06    /* 16-bit FAT, more than 32M */
  221 #define MBR_PTYPE_NTFS          0x07    /* OS/2 HPFS, NTFS, QNX2, Adv. UNIX */
  222 #define MBR_PTYPE_FAT32         0x0b    /* 32-bit FAT */
  223 #define MBR_PTYPE_FAT32L        0x0c    /* 32-bit FAT, LBA-mapped */
  224 #define MBR_PTYPE_FAT16L        0x0e    /* 16-bit FAT, LBA-mapped */
  225 #define MBR_PTYPE_EXT_LBA       0x0f    /* extended partition, LBA-mapped */
  226 #define MBR_PTYPE_ONTRACK       0x54
  227 #define MBR_PTYPE_LNXSWAP       0x82    /* Linux swap or Solaris */
  228 #define MBR_PTYPE_LNXEXT2       0x83    /* Linux native */
  229 #define MBR_PTYPE_EXT_LNX       0x85    /* Linux extended partition */
  230 #define MBR_PTYPE_NTFSVOL       0x87    /* NTFS volume set or HPFS mirrored */
  231 #define MBR_PTYPE_PREP          0x41    /* PReP */
  232 #define MBR_PTYPE_386BSD        0xa5    /* 386BSD partition type */
  233 #define MBR_PTYPE_APPLEUFS      0xa8    /* Apple UFS */
  234 #define MBR_PTYPE_NETBSD        0xa9    /* NetBSD partition type */
  235 #define MBR_PTYPE_OPENBSD       0xa6    /* OpenBSD partition type */
  236 
  237 #define MBR_PSECT(s)            ((s) & 0x3f)
  238 #define MBR_PCYL(c, s)          ((c) + (((s) & 0xc0) << 2))
  239 
  240 #define MBR_IS_EXTENDED(x)      ((x) == MBR_PTYPE_EXT || \
  241                                  (x) == MBR_PTYPE_EXT_LBA || \
  242                                  (x) == MBR_PTYPE_EXT_LNX)
  243 
  244                 /* values for mbr_bootsel.mbrbs_flags */
  245 #define MBR_BS_ACTIVE   0x01    /* Bootselector active (or code present) */
  246 #define MBR_BS_EXTINT13 0x02    /* Set by fdisk if LBA needed (deprecated) */
  247 #define MBR_BS_READ_LBA 0x04    /* Force LBA reads (deprecated) */
  248 #define MBR_BS_EXTLBA   0x08    /* Extended ptn capable (LBA reads) */
  249 /* This is always set, the bootsel is located using the magic number...  */
  250 #define MBR_BS_NEWMBR   0x80    /* New bootsel at offset 440 */
  251 
  252 #if !defined(__ASSEMBLER__)                                     /* { */
  253 
  254 /*
  255  * (x86) BIOS Parameter Block for FAT12
  256  */
  257 struct mbr_bpbFAT12 {
  258         uint16_t        bpbBytesPerSec; /* bytes per sector */
  259         uint8_t         bpbSecPerClust; /* sectors per cluster */
  260         uint16_t        bpbResSectors;  /* number of reserved sectors */
  261         uint8_t         bpbFATs;        /* number of FATs */
  262         uint16_t        bpbRootDirEnts; /* number of root directory entries */
  263         uint16_t        bpbSectors;     /* total number of sectors */
  264         uint8_t         bpbMedia;       /* media descriptor */
  265         uint16_t        bpbFATsecs;     /* number of sectors per FAT */
  266         uint16_t        bpbSecPerTrack; /* sectors per track */
  267         uint16_t        bpbHeads;       /* number of heads */
  268         uint16_t        bpbHiddenSecs;  /* # of hidden sectors */
  269 } __attribute__((__packed__));
  270 
  271 /*
  272  * (x86) BIOS Parameter Block for FAT16
  273  */
  274 struct mbr_bpbFAT16 {
  275         uint16_t        bpbBytesPerSec; /* bytes per sector */
  276         uint8_t         bpbSecPerClust; /* sectors per cluster */
  277         uint16_t        bpbResSectors;  /* number of reserved sectors */
  278         uint8_t         bpbFATs;        /* number of FATs */
  279         uint16_t        bpbRootDirEnts; /* number of root directory entries */
  280         uint16_t        bpbSectors;     /* total number of sectors */
  281         uint8_t         bpbMedia;       /* media descriptor */
  282         uint16_t        bpbFATsecs;     /* number of sectors per FAT */
  283         uint16_t        bpbSecPerTrack; /* sectors per track */
  284         uint16_t        bpbHeads;       /* number of heads */
  285         uint32_t        bpbHiddenSecs;  /* # of hidden sectors */
  286         uint32_t        bpbHugeSectors; /* # of sectors if bpbSectors == 0 */
  287         uint8_t         bsDrvNum;       /* Int 0x13 drive number (e.g. 0x80) */
  288         uint8_t         bsReserved1;    /* Reserved; set to 0 */
  289         uint8_t         bsBootSig;      /* 0x29 if next 3 fields are present */
  290         uint8_t         bsVolID[4];     /* Volume serial number */
  291         uint8_t         bsVolLab[11];   /* Volume label */
  292         uint8_t         bsFileSysType[8];
  293                                         /* "FAT12   ", "FAT16   ", "FAT     " */
  294 } __attribute__((__packed__));
  295 
  296 /*
  297  * (x86) BIOS Parameter Block for FAT32
  298  */
  299 struct mbr_bpbFAT32 {
  300         uint16_t        bpbBytesPerSec; /* bytes per sector */
  301         uint8_t         bpbSecPerClust; /* sectors per cluster */
  302         uint16_t        bpbResSectors;  /* number of reserved sectors */
  303         uint8_t         bpbFATs;        /* number of FATs */
  304         uint16_t        bpbRootDirEnts; /* number of root directory entries */
  305         uint16_t        bpbSectors;     /* total number of sectors */
  306         uint8_t         bpbMedia;       /* media descriptor */
  307         uint16_t        bpbFATsecs;     /* number of sectors per FAT */
  308         uint16_t        bpbSecPerTrack; /* sectors per track */
  309         uint16_t        bpbHeads;       /* number of heads */
  310         uint32_t        bpbHiddenSecs;  /* # of hidden sectors */
  311         uint32_t        bpbHugeSectors; /* # of sectors if bpbSectors == 0 */
  312         uint32_t        bpbBigFATsecs;  /* like bpbFATsecs for FAT32 */
  313         uint16_t        bpbExtFlags;    /* extended flags: */
  314 #define MBR_FAT32_FATNUM        0x0F    /*   mask for numbering active FAT */
  315 #define MBR_FAT32_FATMIRROR     0x80    /*   FAT is mirrored (as previously) */
  316         uint16_t        bpbFSVers;      /* filesystem version */
  317 #define MBR_FAT32_FSVERS        0       /*   currently only 0 is understood */
  318         uint32_t        bpbRootClust;   /* start cluster for root directory */
  319         uint16_t        bpbFSInfo;      /* filesystem info structure sector */
  320         uint16_t        bpbBackup;      /* backup boot sector */
  321         uint8_t         bsReserved[12]; /* Reserved for future expansion */
  322         uint8_t         bsDrvNum;       /* Int 0x13 drive number (e.g. 0x80) */
  323         uint8_t         bsReserved1;    /* Reserved; set to 0 */
  324         uint8_t         bsBootSig;      /* 0x29 if next 3 fields are present */
  325         uint8_t         bsVolID[4];     /* Volume serial number */
  326         uint8_t         bsVolLab[11];   /* Volume label */
  327         uint8_t         bsFileSysType[8]; /* "FAT32   " */
  328 } __attribute__((__packed__));
  329 
  330 /*
  331  * (x86) MBR boot selector
  332  */
  333 struct mbr_bootsel {
  334         uint8_t         mbrbs_defkey;
  335         uint8_t         mbrbs_flags;
  336         uint16_t        mbrbs_timeo;
  337         uint8_t         mbrbs_nametab[MBR_PART_COUNT][MBR_BS_PARTNAMESIZE + 1];
  338 } __attribute__((__packed__));
  339 
  340 /*
  341  * MBR partition
  342  */
  343 struct mbr_partition {
  344         uint8_t         mbrp_flag;      /* MBR partition flags */
  345         uint8_t         mbrp_shd;       /* Starting head */
  346         uint8_t         mbrp_ssect;     /* Starting sector */
  347         uint8_t         mbrp_scyl;      /* Starting cylinder */
  348         uint8_t         mbrp_type;      /* Partition type (see below) */
  349         uint8_t         mbrp_ehd;       /* End head */
  350         uint8_t         mbrp_esect;     /* End sector */
  351         uint8_t         mbrp_ecyl;      /* End cylinder */
  352         uint32_t        mbrp_start;     /* Absolute starting sector number */
  353         uint32_t        mbrp_size;      /* Partition size in sectors */
  354 } __attribute__((__packed__));
  355 
  356 int xlat_mbr_fstype(int);       /* in sys/lib/libkern/xlat_mbr_fstype.c */
  357 
  358 /*
  359  * MBR boot sector.
  360  * This is used by both the MBR (Master Boot Record) in sector 0 of the disk
  361  * and the PBR (Partition Boot Record) in sector 0 of an MBR partition.
  362  */
  363 struct mbr_sector {
  364                                         /* Jump instruction to boot code.  */
  365                                         /* Usually 0xE9nnnn or 0xEBnn90 */
  366         uint8_t                 mbr_jmpboot[3]; 
  367                                         /* OEM name and version */
  368         uint8_t                 mbr_oemname[8]; 
  369         union {                         /* BIOS Parameter Block */
  370                 struct mbr_bpbFAT12     bpb12;
  371                 struct mbr_bpbFAT16     bpb16;
  372                 struct mbr_bpbFAT32     bpb32;
  373         } mbr_bpb;
  374                                         /* Boot code */
  375         uint8_t                 mbr_bootcode[310];
  376                                         /* Config for /usr/mdec/mbr_bootsel */
  377         struct mbr_bootsel      mbr_bootsel;
  378                                         /* NT Drive Serial Number */
  379         uint32_t                mbr_dsn;
  380                                         /* mbr_bootsel magic */
  381         uint16_t                mbr_bootsel_magic;
  382                                         /* MBR partition table */
  383         struct mbr_partition    mbr_parts[MBR_PART_COUNT];
  384                                         /* MBR magic (0xaa55) */
  385         uint16_t                mbr_magic;
  386 } __attribute__((__packed__));
  387 
  388 #endif  /* !defined(__ASSEMBLER__) */                           /* } */
  389 
  390 
  391 /* ------------------------------------------
  392  * shared --
  393  *      definitions shared by many platforms
  394  */
  395 
  396 #if !defined(__ASSEMBLER__)                                     /* { */
  397 
  398         /* Maximum # of blocks in bbi_block_table, each bbi_block_size long */
  399 #define SHARED_BBINFO_MAXBLOCKS 118     /* so sizeof(shared_bbinfo) == 512 */
  400 
  401 struct shared_bbinfo {
  402         uint8_t bbi_magic[32];
  403         int32_t bbi_block_size;
  404         int32_t bbi_block_count;
  405         int32_t bbi_block_table[SHARED_BBINFO_MAXBLOCKS];
  406 };
  407 
  408 /* ------------------------------------------
  409  * alpha --
  410  *      Alpha (disk, but also tape) Boot Block.
  411  *
  412  *      See Section (III) 3.6.1 of the Alpha Architecture Reference Manual.
  413  */
  414 
  415 struct alpha_boot_block {
  416         uint64_t bb_data[63];           /* data (disklabel, also as below) */
  417         uint64_t bb_cksum;              /* checksum of the boot block,
  418                                          * taken as uint64_t's
  419                                          */
  420 };
  421 #define bb_secsize      bb_data[60]     /* secondary size (blocks) */
  422 #define bb_secstart     bb_data[61]     /* secondary start (blocks) */
  423 #define bb_flags        bb_data[62]     /* unknown flags (set to zero) */
  424 
  425 #define ALPHA_BOOT_BLOCK_OFFSET         0       /* offset of boot block. */
  426 #define ALPHA_BOOT_BLOCK_BLOCKSIZE      512     /* block size for sector
  427                                                  * size/start, and for boot
  428                                                  * block itself.
  429                                                  */
  430 
  431 #define ALPHA_BOOT_BLOCK_CKSUM(bb,cksum)                                \
  432         do {                                                            \
  433                 const struct alpha_boot_block *_bb = (bb);              \
  434                 uint64_t _cksum;                                        \
  435                 int _i;                                                 \
  436                                                                         \
  437                 _cksum = 0;                                             \
  438                 for (_i = 0;                                            \
  439                     _i < (sizeof _bb->bb_data / sizeof _bb->bb_data[0]); \
  440                     _i++)                                               \
  441                         _cksum += _bb->bb_data[_i];                     \
  442                 *(cksum) = _cksum;                                      \
  443         } while (/*CONSTCOND*/ 0)
  444 
  445 /* ------------------------------------------
  446  * apple --
  447  *      Apple computers boot block related information
  448  */
  449 
  450 /*
  451  *      Driver Descriptor Map, from Inside Macintosh: Devices, SCSI Manager
  452  *      pp 12-13.  The driver descriptor map always resides on physical block 0.
  453  */
  454 struct apple_drvr_descriptor {
  455         uint32_t        descBlock;      /* first block of driver */
  456         uint16_t        descSize;       /* driver size in blocks */
  457         uint16_t        descType;       /* system type */
  458 };
  459 
  460 /*
  461  *      system types; Apple reserves 0-15
  462  */
  463 #define APPLE_DRVR_TYPE_MACINTOSH       1
  464 
  465 #define APPLE_DRVR_MAP_MAGIC            0x4552
  466 #define APPLE_DRVR_MAP_MAX_DESCRIPTORS  61
  467 
  468 struct apple_drvr_map {
  469         uint16_t        sbSig;          /* map signature */
  470         uint16_t        sbBlockSize;    /* block size of device */
  471         uint32_t        sbBlkCount;     /* number of blocks on device */
  472         uint16_t        sbDevType;      /* (used internally by ROM) */
  473         uint16_t        sbDevID;        /* (used internally by ROM) */
  474         uint32_t        sbData;         /* (used internally by ROM) */
  475         uint16_t        sbDrvrCount;    /* number of driver descriptors */
  476         struct apple_drvr_descriptor sb_dd[APPLE_DRVR_MAP_MAX_DESCRIPTORS];
  477         uint16_t        pad[3];
  478 } __attribute__((__packed__));
  479 
  480 /*
  481  *      Partition map structure from Inside Macintosh: Devices, SCSI Manager
  482  *      pp. 13-14.  The partition map always begins on physical block 1.
  483  *
  484  *      With the exception of block 0, all blocks on the disk must belong to
  485  *      exactly one partition.  The partition map itself belongs to a partition
  486  *      of type `APPLE_PARTITION_MAP', and is not limited in size by anything
  487  *      other than available disk space.  The partition map is not necessarily
  488  *      the first partition listed.
  489  */
  490 #define APPLE_PART_MAP_ENTRY_MAGIC      0x504d
  491 
  492 struct apple_part_map_entry {
  493         uint16_t        pmSig;          /* partition signature */
  494         uint16_t        pmSigPad;       /* (reserved) */
  495         uint32_t        pmMapBlkCnt;    /* number of blocks in partition map */
  496         uint32_t        pmPyPartStart;  /* first physical block of partition */
  497         uint32_t        pmPartBlkCnt;   /* number of blocks in partition */
  498         uint8_t         pmPartName[32]; /* partition name */
  499         uint8_t         pmPartType[32]; /* partition type */
  500         uint32_t        pmLgDataStart;  /* first logical block of data area */
  501         uint32_t        pmDataCnt;      /* number of blocks in data area */
  502         uint32_t        pmPartStatus;   /* partition status information */
  503         uint32_t        pmLgBootStart;  /* first logical block of boot code */
  504         uint32_t        pmBootSize;     /* size of boot code, in bytes */
  505         uint32_t        pmBootLoad;     /* boot code load address */
  506         uint32_t        pmBootLoad2;    /* (reserved) */
  507         uint32_t        pmBootEntry;    /* boot code entry point */
  508         uint32_t        pmBootEntry2;   /* (reserved) */
  509         uint32_t        pmBootCksum;    /* boot code checksum */
  510         int8_t          pmProcessor[16]; /* processor type (e.g. "68020") */
  511         uint8_t         pmBootArgs[128]; /* A/UX boot arguments */
  512         uint8_t         pad[248];       /* pad to end of block */
  513 };
  514 
  515 #define APPLE_PART_TYPE_DRIVER          "APPLE_DRIVER"
  516 #define APPLE_PART_TYPE_DRIVER43        "APPLE_DRIVER43"
  517 #define APPLE_PART_TYPE_DRIVERATA       "APPLE_DRIVER_ATA"
  518 #define APPLE_PART_TYPE_DRIVERIOKIT     "APPLE_DRIVER_IOKIT"
  519 #define APPLE_PART_TYPE_FWDRIVER        "APPLE_FWDRIVER"
  520 #define APPLE_PART_TYPE_FWB_COMPONENT   "FWB DRIVER COMPONENTS"
  521 #define APPLE_PART_TYPE_FREE            "APPLE_FREE"
  522 #define APPLE_PART_TYPE_MAC             "APPLE_HFS"
  523 #define APPLE_PART_TYPE_NETBSD          "NETBSD"
  524 #define APPLE_PART_TYPE_NBSD_PPCBOOT    "NETBSD/MACPPC"
  525 #define APPLE_PART_TYPE_NBSD_68KBOOT    "NETBSD/MAC68K"
  526 #define APPLE_PART_TYPE_PATCHES         "APPLE_PATCHES"
  527 #define APPLE_PART_TYPE_PARTMAP         "APPLE_PARTITION_MAP"
  528 #define APPLE_PART_TYPE_PATCHES         "APPLE_PATCHES"
  529 #define APPLE_PART_TYPE_SCRATCH         "APPLE_SCRATCH"
  530 #define APPLE_PART_TYPE_UNIX            "APPLE_UNIX_SVR2"
  531 
  532 /*
  533  * "pmBootArgs" for APPLE_UNIX_SVR2 partition.
  534  * NetBSD/mac68k only uses Magic, Cluster, Type, and Flags.
  535  */
  536 struct apple_blockzeroblock {
  537         uint32_t       bzbMagic;
  538         uint8_t        bzbCluster;
  539         uint8_t        bzbType;
  540         uint16_t       bzbBadBlockInode;
  541         uint16_t       bzbFlags;
  542         uint16_t       bzbReserved;
  543         uint32_t       bzbCreationTime;
  544         uint32_t       bzbMountTime;
  545         uint32_t       bzbUMountTime;
  546 };
  547 
  548 #define APPLE_BZB_MAGIC         0xABADBABE
  549 #define APPLE_BZB_TYPEFS        1
  550 #define APPLE_BZB_TYPESWAP      3
  551 #define APPLE_BZB_ROOTFS        0x8000
  552 #define APPLE_BZB_USRFS         0x4000
  553 
  554 /* ------------------------------------------
  555  * hp300
  556  *
  557  */
  558 
  559 /* volume header for "LIF" format volumes */
  560 
  561 struct  hp300_lifvol {
  562         int16_t vol_id;
  563         char    vol_label[6];
  564         int32_t vol_addr;
  565         int16_t vol_oct;
  566         int16_t vol_dummy;
  567         int32_t vol_dirsize;
  568         int16_t vol_version;
  569         int16_t vol_zero;
  570         int32_t vol_huh1;
  571         int32_t vol_huh2;
  572         int32_t vol_length;
  573 };
  574 
  575 /* LIF directory entry format */
  576 
  577 struct  hp300_lifdir {
  578         char    dir_name[10];
  579         int16_t dir_type;
  580         int32_t dir_addr;
  581         int32_t dir_length;
  582         char    dir_toc[6];
  583         int16_t dir_flag;
  584         int32_t dir_exec;
  585 };
  586 
  587 /* load header for boot rom */
  588 struct hp300_load {
  589         int32_t address;
  590         int32_t count;
  591 };
  592 
  593 #define HP300_VOL_ID            -32768
  594 #define HP300_VOL_OCT           4096
  595 #define HP300_DIR_TYPE          -5822
  596 #define HP300_DIR_FLAG          0x8001  /* dont ask me! */
  597 #define HP300_SECTSIZE          256
  598 
  599 /* ------------------------------------------
  600  * x86
  601  *
  602  */
  603 
  604 /*
  605  * Parameters for NetBSD /boot written to start of pbr code by installboot
  606  */
  607 
  608 struct x86_boot_params {
  609         uint32_t        bp_length;      /* length of patchable data */
  610         uint32_t        bp_flags;
  611         uint32_t        bp_timeout;     /* boot timeout in seconds */
  612         uint32_t        bp_consdev;
  613         uint32_t        bp_conspeed;
  614         uint8_t         bp_password[16];        /* md5 hash of password */
  615         char            bp_keymap[16];  /* keyboard traslation map */
  616 };
  617 
  618 #endif  /* !defined(__ASSEMBLER__) */                           /* } */
  619 
  620 #define X86_BOOT_MAGIC(n)       ('x' << 24 | 0x86b << 12 | 'm' << 4 | (n))
  621 #define X86_BOOT_MAGIC_1        X86_BOOT_MAGIC(1)       /* pbr.S */
  622 #define X86_BOOT_MAGIC_2        X86_BOOT_MAGIC(2)       /* bootxx.S */
  623 #define X86_BOOT_MAGIC_PXE      X86_BOOT_MAGIC(3)       /* start_pxe.S */
  624 
  625                 /* values for bp_flags */
  626 #define X86_BP_FLAGS_RESET_VIDEO        1
  627 #define X86_BP_FLAGS_PASSWORD           2
  628 
  629                 /* values for bp_consdev */
  630 #define X86_BP_CONSDEV_PC       0
  631 #define X86_BP_CONSDEV_COM0     1
  632 #define X86_BP_CONSDEV_COM1     2
  633 #define X86_BP_CONSDEV_COM2     3
  634 #define X86_BP_CONSDEV_COM3     4
  635 #define X86_BP_CONSDEV_COM0KBD  5
  636 #define X86_BP_CONSDEV_COM1KBD  6
  637 #define X86_BP_CONSDEV_COM2KBD  7
  638 #define X86_BP_CONSDEV_COM3KBD  8
  639 
  640 #if !defined(__ASSEMBLER__)                                     /* { */
  641 
  642 /* ------------------------------------------
  643  * macppc
  644  */
  645 
  646 #define MACPPC_BOOT_BLOCK_OFFSET        2048
  647 #define MACPPC_BOOT_BLOCK_BLOCKSIZE     512
  648 #define MACPPC_BOOT_BLOCK_MAX_SIZE      2048    /* XXX: could be up to 6144 */
  649         /* Magic string -- 32 bytes long (including the NUL) */
  650 #define MACPPC_BBINFO_MAGIC             "NetBSD/macppc bootxx   20020515"
  651 
  652 /* ------------------------------------------
  653  * news68k, newsmips
  654  */
  655 
  656 #define NEWS_BOOT_BLOCK_LABELOFFSET     64 /* XXX from <machine/disklabel.h> */
  657 #define NEWS_BOOT_BLOCK_OFFSET          0
  658 #define NEWS_BOOT_BLOCK_BLOCKSIZE       512
  659 #define NEWS_BOOT_BLOCK_MAX_SIZE        (512 * 16)
  660 
  661         /* Magic string -- 32 bytes long (including the NUL) */
  662 #define NEWS68K_BBINFO_MAGIC            "NetBSD/news68k bootxx  20020518"
  663 #define NEWSMIPS_BBINFO_MAGIC           "NetBSD/newsmips bootxx 20020518"
  664 
  665 /* ------------------------------------------
  666  * next68k
  667  */
  668 
  669 #define NEXT68K_LABEL_MAXPARTITIONS     8       /* number of partitions in next68k_disklabel */
  670 #define NEXT68K_LABEL_CPULBLLEN         24
  671 #define NEXT68K_LABEL_MAXDNMLEN         24
  672 #define NEXT68K_LABEL_MAXTYPLEN         24
  673 #define NEXT68K_LABEL_MAXBFLEN          24
  674 #define NEXT68K_LABEL_MAXHNLEN          32
  675 #define NEXT68K_LABEL_MAXMPTLEN         16
  676 #define NEXT68K_LABEL_MAXFSTLEN         8
  677 #define NEXT68K_LABEL_NBAD              1670    /* sized to make label ~= 8KB */
  678 
  679 struct next68k_partition {
  680         int32_t cp_offset;              /* starting sector */
  681         int32_t cp_size;                /* number of sectors in partition */
  682         int16_t cp_bsize;               /* block size in bytes */
  683         int16_t cp_fsize;               /* filesystem basic fragment size */
  684         char    cp_opt;                 /* optimization type: 's'pace/'t'ime */
  685         char    cp_pad1;
  686         int16_t cp_cpg;                 /* filesystem cylinders per group */
  687         int16_t cp_density;             /* bytes per inode density */
  688         int8_t  cp_minfree;             /* minfree (%) */
  689         int8_t  cp_newfs;               /* run newfs during init */
  690         char    cp_mountpt[NEXT68K_LABEL_MAXMPTLEN];
  691                                         /* default/standard mount point */
  692         int8_t  cp_automnt;             /* auto-mount when inserted */
  693         char    cp_type[NEXT68K_LABEL_MAXFSTLEN]; /* file system type name */
  694         char    cp_pad2;
  695 } __attribute__ ((packed));
  696 
  697 /* The disklabel the way it is on the disk */
  698 struct next68k_disklabel {
  699         int32_t cd_version;             /* label version */
  700         int32_t cd_label_blkno;         /* block # of this label */
  701         int32_t cd_size;                /* size of media area (sectors) */
  702         char    cd_label[NEXT68K_LABEL_CPULBLLEN]; /* disk name (label) */
  703         uint32_t cd_flags;              /* flags */
  704         uint32_t cd_tag;                /* volume tag */
  705         char    cd_name[NEXT68K_LABEL_MAXDNMLEN]; /* drive (hardware) name */
  706         char    cd_type[NEXT68K_LABEL_MAXTYPLEN]; /* drive type */
  707         int32_t cd_secsize;             /* # of bytes per sector */
  708         int32_t cd_ntracks;             /* # of tracks per cylinder */
  709         int32_t cd_nsectors;            /* # of data sectors per track */
  710         int32_t cd_ncylinders;          /* # of data cylinders per unit */
  711         int32_t cd_rpm;                 /* rotational speed */
  712         int16_t cd_front;               /* # of sectors in "front porch" */
  713         int16_t cd_back;                /* # of sectors in "back porch" */
  714         int16_t cd_ngroups;             /* # of alt groups */
  715         int16_t cd_ag_size;             /* alt group size (sectors) */
  716         int16_t cd_ag_alts;             /* alternate sectors / alt group */
  717         int16_t cd_ag_off;              /* sector offset to first alternate */
  718         int32_t cd_boot_blkno[2];       /* boot program locations */
  719         char    cd_kernel[NEXT68K_LABEL_MAXBFLEN]; /* default kernel name */
  720         char    cd_hostname[NEXT68K_LABEL_MAXHNLEN];
  721                                 /* host name (usu. where disk was labeled) */
  722         char    cd_rootpartition;       /* root partition letter e.g. 'a' */
  723         char    cd_rwpartition;         /* r/w partition letter e.g. 'b' */
  724         struct next68k_partition cd_partitions[NEXT68K_LABEL_MAXPARTITIONS];
  725 
  726         union {
  727                 uint16_t CD_v3_checksum; /* label version 3 checksum */
  728                 int32_t CD_bad[NEXT68K_LABEL_NBAD];
  729                                         /* block number that is bad */
  730         } cd_un;
  731         uint16_t cd_checksum;           /* label version 1 or 2 checksum */
  732 } __attribute__ ((packed));
  733 
  734 #define NEXT68K_LABEL_cd_checksum       cd_checksum
  735 #define NEXT68K_LABEL_cd_v3_checksum    cd_un.CD_v3_checksum
  736 #define NEXT68K_LABEL_cd_bad            cd_un.CD_bad
  737 
  738 #define NEXT68K_LABEL_SECTOR            0       /* sector containing label */
  739 #define NEXT68K_LABEL_OFFSET            0       /* offset of label in sector */
  740 #define NEXT68K_LABEL_SIZE              8192    /* size of label */
  741 #define NEXT68K_LABEL_CD_V1             0x4e655854 /* version #1: "NeXT" */
  742 #define NEXT68K_LABEL_CD_V2             0x646c5632 /* version #2: "dlV2" */
  743 #define NEXT68K_LABEL_CD_V3             0x646c5633 /* version #3: "dlV3" */
  744 #define NEXT68K_LABEL_DEFAULTFRONTPORCH (160 * 2)
  745 #define NEXT68K_LABEL_DEFAULTBOOT0_1    (32 * 2)
  746 #define NEXT68K_LABEL_DEFAULTBOOT0_2    (96 * 2)
  747 
  748 /* ------------------------------------------
  749  * pmax --
  750  *      PMAX (DECstation / MIPS) boot block information
  751  */
  752 
  753 /*
  754  * If mode is 0, there is just one sequence of blocks and one Dec_BootMap
  755  * is used.  If mode is 1, there are multiple sequences of blocks
  756  * and multiple Dec_BootMaps are used, the last with numBlocks = 0.
  757  */
  758 struct pmax_boot_map {
  759         int32_t num_blocks;             /* Number of blocks to read. */
  760         int32_t start_block;            /* Starting block on disk. */
  761 };
  762 
  763 /*
  764  * This is the structure of a disk or tape boot block.  The boot_map
  765  * can either be a single boot count and start block (contiguous mode)
  766  * or a list of up to 61 (to fill a 512 byte sector) block count and
  767  * start block pairs.  Under NetBSD, contiguous mode is always used.
  768  */
  769 struct pmax_boot_block {
  770         uint8_t         pad[8];
  771         int32_t         magic;                  /* PMAX_BOOT_MAGIC */
  772         int32_t         mode;                   /* Mode for boot info. */
  773         uint32_t        load_addr;              /* Address to start loading. */
  774         uint32_t        exec_addr;              /* Address to start execing. */
  775         struct          pmax_boot_map map[61];  /* boot program section(s). */
  776 } __attribute__((__packed__));
  777 
  778 #define PMAX_BOOT_MAGIC                 0x0002757a
  779 #define PMAX_BOOTMODE_CONTIGUOUS        0
  780 #define PMAX_BOOTMODE_SCATTERED         1
  781 
  782 #define PMAX_BOOT_BLOCK_OFFSET          0
  783 #define PMAX_BOOT_BLOCK_BLOCKSIZE       512
  784 
  785 
  786 /* ------------------------------------------
  787  * sparc
  788  */
  789 
  790 #define SPARC_BOOT_BLOCK_OFFSET         512
  791 #define SPARC_BOOT_BLOCK_BLOCKSIZE      512
  792 #define SPARC_BOOT_BLOCK_MAX_SIZE       (512 * 15)
  793         /* Magic string -- 32 bytes long (including the NUL) */
  794 #define SPARC_BBINFO_MAGIC              "NetBSD/sparc bootxx    20020515"
  795 
  796 
  797 /* ------------------------------------------
  798  * sparc64
  799  */
  800 
  801 #define SPARC64_BOOT_BLOCK_OFFSET       512
  802 #define SPARC64_BOOT_BLOCK_BLOCKSIZE    512
  803 #define SPARC64_BOOT_BLOCK_MAX_SIZE     (512 * 15)
  804 
  805 
  806 /* ------------------------------------------
  807  * sun68k (sun2, sun3)
  808  */
  809 
  810 #define SUN68K_BOOT_BLOCK_OFFSET        512
  811 #define SUN68K_BOOT_BLOCK_BLOCKSIZE     512
  812 #define SUN68K_BOOT_BLOCK_MAX_SIZE      (512 * 15)
  813         /* Magic string -- 32 bytes long (including the NUL) */
  814 #define SUN68K_BBINFO_MAGIC             "NetBSD/sun68k bootxx   20020515"
  815 
  816 
  817 /* ------------------------------------------
  818  * vax --
  819  *      VAX boot block information
  820  */
  821 
  822 struct vax_boot_block {
  823 /* Note that these don't overlap any of the pmax boot block */
  824         uint8_t         pad0[2];
  825         uint8_t         bb_id_offset;   /* offset in words to id (magic1)*/
  826         uint8_t         bb_mbone;       /* must be one */
  827         uint16_t        bb_lbn_hi;      /* lbn (hi word) of bootstrap */
  828         uint16_t        bb_lbn_low;     /* lbn (low word) of bootstrap */
  829         uint8_t         pad1[332];
  830 
  831         /* The rest of these fields are identification area and describe
  832          * the secondary block for uVAX VMB.
  833          */
  834         uint8_t         bb_magic1;      /* magic number */
  835         uint8_t         bb_mbz1;        /* must be zero */
  836         uint8_t         bb_pad1;        /* any value */
  837         uint8_t         bb_sum1;        /* ~(magic1 + mbz1 + pad1) */
  838 
  839         uint8_t         bb_mbz2;        /* must be zero */
  840         uint8_t         bb_volinfo;     /* volinfo */
  841         uint8_t         bb_pad2a;       /* any value */
  842         uint8_t         bb_pad2b;       /* any value */
  843 
  844         uint32_t        bb_size;        /* size in blocks of bootstrap */
  845         uint32_t        bb_load;        /* load offset to bootstrap */
  846         uint32_t        bb_entry;       /* byte offset in bootstrap */
  847         uint32_t        bb_sum3;        /* sum of previous 3 fields */
  848 
  849         /* The rest is unused.
  850          */
  851         uint8_t         pad2[148];
  852 } __attribute__((__packed__));
  853 
  854 #define VAX_BOOT_MAGIC1                 0x18    /* size of BB info? */
  855 #define VAX_BOOT_VOLINFO_NONE           0x00    /* no special info */
  856 #define VAX_BOOT_VOLINFO_SS             0x01    /* single sided */
  857 #define VAX_BOOT_VOLINFO_DS             0x81    /* double sided */
  858 
  859 #define VAX_BOOT_SIZE                   15      /* 15 blocks */
  860 #define VAX_BOOT_LOAD                   0       /* no load offset */
  861 #define VAX_BOOT_ENTRY                  0x200   /* one block in */
  862 
  863 #define VAX_BOOT_BLOCK_OFFSET           0
  864 #define VAX_BOOT_BLOCK_BLOCKSIZE        512
  865 
  866 
  867 /* ------------------------------------------
  868  * x68k
  869  */
  870 
  871 #define X68K_BOOT_BLOCK_OFFSET          0
  872 #define X68K_BOOT_BLOCK_BLOCKSIZE       512
  873 #define X68K_BOOT_BLOCK_MAX_SIZE        (512 * 16)
  874         /* Magic string -- 32 bytes long (including the NUL) */
  875 #define X68K_BBINFO_MAGIC               "NetBSD/x68k bootxx     20020601"
  876 
  877 #endif  /* !defined(__ASSEMBLER__) */                           /* } */
  878 
  879 #endif  /* !_SYS_BOOTBLOCK_H */

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