/*	$OpenBSD: dpme.h,v 1.25 2016/01/29 22:51:43 krw Exp $	*/

/*
 * dpme.h - Disk Partition Map Entry (dpme)
 *
 * Written by Eryk Vershen
 *
 * This file describes structures and values related to the standard
 * Apple SCSI disk partitioning scheme.
 *
 * Each entry is (and shall remain) 512 bytes long.
 *
 * For more information see:
 *	"Inside Macintosh: Devices" pages 3-12 to 3-15.
 *	"Inside Macintosh - Volume V" pages V-576 to V-582
 *	"Inside Macintosh - Volume IV" page IV-292
 *
 * There is a kernel file with much of the same info (under different names):
 *	/usr/src/mklinux-1.0DR2/osfmk/src/mach_kernel/ppc/POWERMAC/mac_label.h
 */

/*
 * Copyright 1996 by Apple Computer, Inc.
 *              All Rights Reserved
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appears in all copies and
 * that both the copyright notice and this permission notice appear in
 * supporting documentation.
 *
 * APPLE COMPUTER DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL APPLE COMPUTER BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
 * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#ifndef __dpme__
#define __dpme__

#define	BLOCK0_SIGNATURE	0x4552	/* i.e. 'ER' */
#define	DPME_SIGNATURE		0x504D	/* i.e. 'PM' */

#define	DPISTRLEN	32

/*
 * Each partition map entry (blocks 1 through n) has this format
 */
struct dpme {
    uint16_t	dpme_signature;		/* "PM" */
    uint8_t	dpme_reserved_1[2];
    uint32_t	dpme_map_entries;	/* # of partition entries */
    uint32_t	dpme_pblock_start;	/* physical block start of partition */
    uint32_t	dpme_pblocks;		/* physical block count of partition */
    char	dpme_name[DPISTRLEN+1];	/* name of partition + NUL */
    char	dpme_type[DPISTRLEN+1];	/* type of partition + NUL */
    uint32_t	dpme_lblock_start;	/* logical block start of partition */
    uint32_t	dpme_lblocks;		/* logical block count of partition */
    uint32_t	dpme_flags;
#define	DPME_OS_SPECIFIC_1	(1<<8)
#define	DPME_OS_SPECIFIC_2	(1<<7)
#define	DPME_OS_PIC_CODE	(1<<6)
#define	DPME_WRITABLE		(1<<5)
#define	DPME_READABLE		(1<<4)
#define	DPME_BOOTABLE		(1<<3)
#define	DPME_IN_USE		(1<<2)
#define	DPME_ALLOCATED		(1<<1)
#define	DPME_VALID		(1<<0)
    uint32_t	dpme_boot_block;	/* logical block start of boot code */
    uint32_t	dpme_boot_bytes;	/* byte count of boot code */
    uint16_t	dpme_load_addr;		/* memory address of boot code */
    uint8_t	dpme_reserved_2[4];
    uint32_t	dpme_goto_addr;		/* memory jump address of boot code */
    uint8_t	dpme_reserved_3[4];
    uint32_t	dpme_checksum;		/* of the boot code. */
    char	dpme_processor_id[17];	/* processor type + NUL */
    uint8_t	dpme_reserved_4[376];
};

#endif /* __dpme__ */