/*	$NetBSD: ahdilbl.h,v 1.5 2011/10/01 15:59:00 chs Exp $	*/

/*
 * Copyright (c) 1995 Leo Weppelman.
 * 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.
 *
 * 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.
 */

#ifndef AHDILABEL_H
#define AHDILABEL_H

/***** from src/sys/arch/atari/include/disklabel.h *************************/

/*
 * On a volume, exclusively used by NetBSD, the boot block starts at
 * sector 0. To allow shared use of a volume between two or more OS's
 * the vendor specific AHDI format is supported. In this case the boot
 * block is located at the start of an AHDI partition. In any case the
 * size of the boot block must be at least 8KB.
 */
#define	BBMINSIZE	8192		/* minimum size of boot block      */
#define	LABELSECTOR	0		/* `natural' start of boot block   */
#define	LABELOFFSET	516		/* offset of disk label in bytes,
					   relative to start of boot block */
#define	LABELMAXSIZE	1020		/* maximum size of disk label      */

#define	MAXPARTITIONS	16		/* max. # of NetBSD partitions     */
#define	RAW_PART	2		/* xx?c is raw partition	   */

#define	NO_BOOT_BLOCK	((u_int)-1)
#define	MAXAUXROOTS	29		/* max. # of auxiliary root sectors */

struct bootblock {
	u_int8_t	bb_xxboot[LABELOFFSET - sizeof(u_int32_t)];
						/* first-stage boot loader */
	u_int32_t	bb_magic;		/* boot block magic number */
#define	NBDAMAGIC	0x4e424441
#define	AHDIMAGIC	0x41484449
	u_int8_t	bb_label[LABELMAXSIZE];	/* disk pack label         */
	u_int8_t	bb_bootxx[BBMINSIZE - (LABELOFFSET + LABELMAXSIZE)];
						/* second-stage boot loader*/
};

#define BBGETLABEL(bb, dl)	memcpy((dl), (bb)->bb_label, sizeof (struct disklabel))
#define BBSETLABEL(bb, dl)	memcpy((bb)->bb_label, (dl), sizeof (struct disklabel))

/***** from src/sys/arch/atari/include/ahdilabel.h *************************/

#define	AHDI_BSIZE	512		/* AHDI blocksize		*/
#define	AHDI_BBLOCK	0		/* AHDI bootblock (root sector)	*/
#define	AHDI_MAXROOTS	(MAXAUXROOTS)	/* max. # of AHDI rootsectors	*/
#define	AHDI_MAXPARTS	(AHDI_MAXROOTS+3) /* max. # of AHDI partitions	*/

/*
 * Various `well known' AHDI partition identifiers.
 */
#define	AHDI_MKPID(x,y,z)	(   ((u_int32_t)(x) << 16)	\
				  | ((u_int32_t)(y) << 8)	\
				  | ((u_int32_t)(z))		\
				)
#define	AHDI_PID_XGM	AHDI_MKPID('X','G','M')
#define	AHDI_PID_GEM	AHDI_MKPID('G','E','M')
#define	AHDI_PID_BGM	AHDI_MKPID('B','G','M')
#define	AHDI_PID_RAW	AHDI_MKPID('R','A','W')
#define	AHDI_PID_SWP	AHDI_MKPID('S','W','P')
#define	AHDI_PID_NBD	AHDI_MKPID('N','B','D')
#define	AHDI_PID_NBR	AHDI_MKPID('N','B','R')
#define	AHDI_PID_NBS	AHDI_MKPID('N','B','S')
#define	AHDI_PID_NBU	AHDI_MKPID('N','B','U')

/*
 * Format of AHDI boot block.
 */
#define	AHDI_MAXRPD	4		/* max. # of partition descriptors */
					/* in the AHDI bootblock (aka root)*/
#define	AHDI_MAXARPD	2		/* max. # of partition descriptors */
					/* in an AHDI auxiliary root sector */

struct ahdi_part {
	u_int8_t	ap_flg;		/* bit 0 is in-use flag            */
	u_int8_t	ap_id[3];	/* id: GEM, BGM, XGM, UNX, MIX     */
	u_int32_t	ap_offs;	/* block where partition starts    */
	u_int32_t	ap_size;	/* partition size in blocks        */
#define	ap_end	ap_size /* in the in-core copy, store end instead of size  */
};

struct ahdi_root {
	u_int8_t	 ar_fill[0x1c2];/* filler, can be boot code        */
	u_int32_t	 ar_hdsize;	/* size of entire volume in blocks */
	struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table    */
	u_int32_t	 ar_bslst;	/* start of bad-sector list        */
	u_int32_t	 ar_bslsize;	/* # of blocks in bad-sector list  */
	u_int16_t	 ar_cksum;
};

#endif /* AHDILABEL_H */
