1 /* $NetBSD: biosdisk_ll.h,v 1.8 2003/04/16 12:43:45 dsl 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 sec, head, cyl; /* geometry */ 50 int flags; /* see below */ 51 int chs_sectors; /* # of sectors addressable by CHS */ 52 }; 53 #define BIOSDISK_EXT13 1 /* BIOS supports int13 extension */ 54 55 #if __GNUC__ == 2 && __GNUC_MINOR__ < 7 56 #pragma pack(1) 57 #endif 58 59 /* 60 * Version 1.x drive parameters from int13 extensions 61 * - should be supported by every BIOS that supports the extensions. 62 * Version 3.x parameters allow the drives to be matched properly 63 * - but are much less likely to be supported. 64 */ 65 66 struct biosdisk_ext13info { 67 u_int16_t size; /* size of buffer, set on call */ 68 u_int16_t flags; /* flags, see below */ 69 u_int32_t cyl; /* # of physical cylinders */ 70 u_int32_t head; /* # of physical heads */ 71 u_int32_t sec; /* # of physical sectors per track */ 72 u_int64_t totsec; /* total number of sectors */ 73 u_int16_t sbytes; /* # of bytes per sector */ 74 #if defined(BIOSDISK_EXT13INFO_V2) || defined(BIOSDISK_EXT13INFO_V3) 75 /* v2.0 extensions */ 76 u_int32_t edd_cfg; /* EDD configuration parameters */ 77 #if defined(BIOSDISK_EXT13INFO_V3) 78 /* v3.0 extensions */ 79 u_int16_t devpath_sig; /* 0xbedd if path info present */ 80 #define EXT13_DEVPATH_SIGNATURE 0xbedd 81 u_int8_t devpath_len; /* length from devpath_sig */ 82 u_int8_t fill21[3]; 83 char host_bus[4]; /* Probably "ISA" or "PCI" */ 84 char iface_type[8]; /* "ATA", "ATAPI", "SCSI" etc */ 85 union { 86 u_int8_t ip_8[8]; 87 u_int16_t ip_16[4]; 88 u_int32_t ip_32[2]; 89 u_int64_t ip_64[1]; 90 } interface_path; 91 #define ip_isa_iobase ip_16[0]; /* iobase for ISA bus */ 92 #define ip_pci_bus ip_8[0]; /* PCI bus number */ 93 #define ip_pci_device ip_8[1]; /* PCI device number */ 94 #define ip_pci_function ip_8[2]; /* PCI function number */ 95 union { 96 u_int8_t dp_8[8]; 97 u_int16_t dp_16[4]; 98 u_int32_t dp_32[2]; 99 u_int64_t dp_64[1]; 100 } device_path; 101 #define dp_ata_slave dp_8[0]; 102 #define dp_atapi_slave dp_8[0]; 103 #define dp_atapi_lun dp_8[1]; 104 #define dp_scsi_lun dp_8[0]; 105 #define dp_firewire_guid dp_64[0]; 106 #define dp_fibrechnl_wwn dp_64[0]; 107 u_int8_t fill40[1]; 108 u_int8_t checksum; /* byte sum from dev_path_sig is 0 */ 109 #endif /* BIOSDISK_EXT13INFO_V3 */ 110 #endif /* BIOSDISK_EXT13INFO_V2 */ 111 } __attribute__((packed)); 112 113 #define EXT13_DMA_TRANS 0x0001 /* transparent DMA boundary errors */ 114 #define EXT13_GEOM_VALID 0x0002 /* geometry in c/h/s in struct valid */ 115 #define EXT13_REMOVABLE 0x0004 /* removable device */ 116 #define EXT13_WRITEVERF 0x0008 /* supports write with verify */ 117 #define EXT13_CHANGELINE 0x0010 /* changeline support */ 118 #define EXT13_LOCKABLE 0x0020 /* device is lockable */ 119 #define EXT13_MAXGEOM 0x0040 /* geometry set to max; no media */ 120 121 #if __GNUC__ == 2 && __GNUC_MINOR__ < 7 122 #pragma pack(4) 123 #endif 124 125 #define BIOSDISK_SECSIZE 512 126 127 int set_geometry __P((struct biosdisk_ll *, struct biosdisk_ext13info *)); 128 int readsects __P((struct biosdisk_ll *, daddr_t, int, char *, int)); 129