90 lines
3.6 KiB
C
90 lines
3.6 KiB
C
/* $NetBSD: biosdisk_ll.h,v 1.6 1999/04/28 23:24:42 fvdl Exp $ */
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/*
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* Copyright (c) 1996
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* Matthias Drochner. All rights reserved.
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* Copyright (c) 1996
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* Perry E. Metzger. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgements:
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* This product includes software developed for the NetBSD Project
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* by Matthias Drochner.
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* This product includes software developed for the NetBSD Project
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* by Perry E. Metzger.
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* 4. The names of the authors may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
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* parts from bios_disk.S
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*/
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/*
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* Beware that bios_disk.S relies on the offsets of the structure
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* members.
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*/
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struct biosdisk_ll {
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int dev; /* BIOS device number */
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int sec, head, cyl; /* geometry */
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int flags; /* see below */
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int chs_sectors; /* # of sectors addressable by CHS */
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};
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#define BIOSDISK_EXT13 1 /* BIOS supports int13 extension */
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#if __GNUC__ == 2 && __GNUC_MINOR__ < 7
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#pragma pack(1)
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#endif
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/*
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* Version 1.x drive parameters from int13 extensions. Should be supported
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* by every BIOS that supports the extensions.
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*/
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struct biosdisk_ext13info {
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u_int16_t size; /* size of buffer, set on call */
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u_int16_t flags; /* flags, see below */
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u_int32_t cyl; /* # of physical cylinders */
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u_int32_t head; /* # of physical heads */
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u_int32_t sec; /* # of physical sectors per track */
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u_int64_t totsec; /* total number of sectors */
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u_int16_t sbytes; /* # of bytes per sector */
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} __attribute__((packed));
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#define EXT13_DMA_TRANS 0x0001 /* transparent DMA boundary errors */
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#define EXT13_GEOM_VALID 0x0002 /* geometry in c/h/s in struct valid */
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#define EXT13_REMOVABLE 0x0004 /* removable device */
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#define EXT13_WRITEVERF 0x0008 /* supports write with verify */
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#define EXT13_CHANGELINE 0x0010 /* changeline support */
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#define EXT13_LOCKABLE 0x0020 /* device is lockable */
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#define EXT13_MAXGEOM 0x0040 /* geometry set to max; no media */
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#if __GNUC__ == 2 && __GNUC_MINOR__ < 7
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#pragma pack(4)
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#endif
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#define BIOSDISK_SECSIZE 512
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int set_geometry __P((struct biosdisk_ll *, struct biosdisk_ext13info *));
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int readsects __P((struct biosdisk_ll *, int, int, char *, int));
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