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/* $OpenBSD: dpme.h,v 1.22 2016/01/27 14:19:59 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
struct ddmap {
uint32_t ddBlock; /* 1st driver's starting block (in sbBlkSize blocks!) */
uint16_t ddSize; /* size of 1st driver (512-byte blks) */
uint16_t ddType; /* system type (1 for Mac+) */
};
struct block0 {
uint16_t sbSig; /* "ER" */
uint16_t sbBlkSize; /* physical block size of device */
uint32_t sbBlkCount; /* # of physical blocks on device */
uint16_t sbDevType; /* device type */
uint16_t sbDevId; /* device id */
uint32_t sbData; /* not used */
uint16_t sbDrvrCount; /* driver descriptor count */
struct ddmap sbDDMap[8]; /* driver descriptor map*/
uint8_t sbReserved[430];
};
/*
* 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]; /* name of partition */
char dpme_type[DPISTRLEN]; /* type of partition */
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[16]; /* processor type */
uint8_t dpme_reserved_4[376];
};
#endif /* __dpme__ */
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