1 /* $NetBSD: biosdisk_ll.h,v 1.16 2018/03/08 10:34:33 nonaka 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 #ifndef BIOSDISK_DEFAULT_SECSIZE 124 #define BIOSDISK_DEFAULT_SECSIZE 512 125 #endif 126 127 int set_geometry(struct biosdisk_ll *, struct biosdisk_extinfo *); 128 int readsects(struct biosdisk_ll *, daddr_t, int, char *, int); 129
Indexes created Sat Sep 20 22:09:52 GMT 2025