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

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