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biosdisk_ll.h revision 1.6 
      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