1 /* $NetBSD: biosdisk_ll.h,v 1.6 1999/04/28 23:24:42 fvdl 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. Should be supported 61 * by every BIOS that supports the extensions. 62 */ 63 64 struct biosdisk_ext13info { 65 u_int16_t size; /* size of buffer, set on call */ 66 u_int16_t flags; /* flags, see below */ 67 u_int32_t cyl; /* # of physical cylinders */ 68 u_int32_t head; /* # of physical heads */ 69 u_int32_t sec; /* # of physical sectors per track */ 70 u_int64_t totsec; /* total number of sectors */ 71 u_int16_t sbytes; /* # of bytes per sector */ 72 } __attribute__((packed)); 73 74 #define EXT13_DMA_TRANS 0x0001 /* transparent DMA boundary errors */ 75 #define EXT13_GEOM_VALID 0x0002 /* geometry in c/h/s in struct valid */ 76 #define EXT13_REMOVABLE 0x0004 /* removable device */ 77 #define EXT13_WRITEVERF 0x0008 /* supports write with verify */ 78 #define EXT13_CHANGELINE 0x0010 /* changeline support */ 79 #define EXT13_LOCKABLE 0x0020 /* device is lockable */ 80 #define EXT13_MAXGEOM 0x0040 /* geometry set to max; no media */ 81 82 #if __GNUC__ == 2 && __GNUC_MINOR__ < 7 83 #pragma pack(4) 84 #endif 85 86 #define BIOSDISK_SECSIZE 512 87 88 int set_geometry __P((struct biosdisk_ll *, struct biosdisk_ext13info *)); 89 int readsects __P((struct biosdisk_ll *, int, int, char *, int)); 90