sys/arch/i386/stand/lib/biosdisk_ll.h

   1 /*      $NetBSD: biosdisk_ll.h,v 1.15 2007/12/25 18:33:34 perry Exp $    */
   2
   3 /*
   4  * Copyright (c) 1996
   5  *      Matthias Drochner.  All rights reserved.
   6  * Copyright (c) 1996
   7  *      Perry E. Metzger.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. All advertising materials mentioning features or use of this software
  18  *    must display the following acknowledgements:
  19  *      This product includes software developed for the NetBSD Project
  20  *      by Matthias Drochner.
  21  *      This product includes software developed for the NetBSD Project
  22  *      by Perry E. Metzger.
  23  * 4. The names of the authors may not be used to endorse or promote products
  24  *    derived from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  27  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  28  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  29  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  30  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  31  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  32  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  33  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  34  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  35  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  36  */
  37
  38 /*
  39  * shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
  40  * parts from bios_disk.S
  41  */
  42
  43 /*
  44  * Beware that bios_disk.S relies on the offsets of the structure
  45  * members.
  46  */
  47 struct biosdisk_ll {
  48         int             dev;            /* BIOS device number */
  49         int             type;           /* device type; see below */
  50         int             sec, head, cyl; /* geometry */
  51         int             flags;          /* see below */
  52         int             chs_sectors;    /* # of sectors addressable by CHS */
  53         int             secsize;        /* bytes per sector */
  54 };
  55 #define BIOSDISK_INT13EXT       1       /* BIOS supports int13 extension */
  56
  57 #define BIOSDISK_TYPE_FD        0
  58 #define BIOSDISK_TYPE_HD        1
  59 #define BIOSDISK_TYPE_CD        2
  60
  61 /*
  62  * Version 1.x drive parameters from int13 extensions
  63  * - should be supported by every BIOS that supports the extensions.
  64  * Version 3.x parameters allow the drives to be matched properly
  65  * - but are much less likely to be supported.
  66  */
  67
  68 struct biosdisk_extinfo {
  69         uint16_t        size;           /* size of buffer, set on call */
  70         uint16_t        flags;          /* flags, see below */
  71         uint32_t        cyl;            /* # of physical cylinders */
  72         uint32_t        head;           /* # of physical heads */
  73         uint32_t        sec;            /* # of physical sectors per track */
  74         uint64_t        totsec;         /* total number of sectors */
  75         uint16_t        sbytes;         /* # of bytes per sector */
  76 #if defined(BIOSDISK_EXTINFO_V2) || defined(BIOSDISK_EXTINFO_V3)
  77         /* v2.0 extensions */
  78         uint32_t        edd_cfg;        /* EDD configuration parameters */
  79 #if defined(BIOSDISK_EXTINFO_V3)
  80         /* v3.0 extensions */
  81         uint16_t        devpath_sig;    /* 0xbedd if path info present */
  82 #define EXTINFO_DEVPATH_SIGNATURE       0xbedd
  83         uint8_t         devpath_len;    /* length from devpath_sig */
  84         uint8_t         fill21[3];
  85         char            host_bus[4];    /* Probably "ISA" or "PCI" */
  86         char            iface_type[8];  /* "ATA", "ATAPI", "SCSI" etc */
  87         union {
  88                 uint8_t         ip_8[8];
  89                 uint16_t        ip_16[4];
  90                 uint32_t        ip_32[2];
  91                 uint64_t        ip_64[1];
  92         } interface_path;
  93 #define ip_isa_iobase   ip_16[0];       /* iobase for ISA bus */
  94 #define ip_pci_bus      ip_8[0];        /* PCI bus number */
  95 #define ip_pci_device   ip_8[1];        /* PCI device number */
  96 #define ip_pci_function ip_8[2];        /* PCI function number */
  97         union {
  98                 uint8_t         dp_8[8];
  99                 uint16_t        dp_16[4];
 100                 uint32_t        dp_32[2];
 101                 uint64_t        dp_64[1];
 102         } device_path;
 103 #define dp_ata_slave    dp_8[0];
 104 #define dp_atapi_slave  dp_8[0];
 105 #define dp_atapi_lun    dp_8[1];
 106 #define dp_scsi_lun     dp_8[0];
 107 #define dp_firewire_guid dp_64[0];
 108 #define dp_fibrechnl_wwn dp_64[0];
 109         uint8_t         fill40[1];
 110         uint8_t         checksum;       /* byte sum from dev_path_sig is 0 */
 111 #endif /* BIOSDISK_EXTINFO_V3 */
 112 #endif /* BIOSDISK_EXTINFO_V2 */
 113 } __packed;
 114
 115 #define EXTINFO_DMA_TRANS       0x0001  /* transparent DMA boundary errors */
 116 #define EXTINFO_GEOM_VALID      0x0002  /* geometry in c/h/s in struct valid */
 117 #define EXTINFO_REMOVABLE       0x0004  /* removable device */
 118 #define EXTINFO_WRITEVERF       0x0008  /* supports write with verify */
 119 #define EXTINFO_CHANGELINE      0x0010  /* changeline support */
 120 #define EXTINFO_LOCKABLE        0x0020  /* device is lockable */
 121 #define EXTINFO_MAXGEOM         0x0040  /* geometry set to max; no media */
 122
 123 #define BIOSDISK_DEFAULT_SECSIZE        512
 124
 125 int set_geometry(struct biosdisk_ll *, struct biosdisk_extinfo *);
 126 int readsects(struct biosdisk_ll *, daddr_t, int, char *, int);