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/* $OpenBSD: dpme.h,v 1.18 2016/01/23 14:10:05 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 DPISTRLEN 32
#define DPME_SIGNATURE 0x504D /* i.e. 'PM' */
/*
* Since block0 is assumed to be the same size as the physical sector size,
* support is limited to 512-byte sector devices!
*/
struct block0 {
uint16_t sbSig; /* unique value for SCSI block 0 */
uint16_t sbBlkSize; /* block size of device */
uint32_t sbBlkCount; /* number of blocks on device */
uint16_t sbDevType; /* device type */
uint16_t sbDevId; /* device id */
uint32_t sbData; /* not used */
uint16_t sbDrvrCount; /* driver descriptor count */
uint16_t sbMap[247]; /* descriptor map */
};
/*
* Where &sbMap[0] is actually an array struct ddmap[sbDrvrCount]
* kludge to get around alignment junk
*/
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+) */
};
/*
* Each partition map entry (blocks 1 through n) has this format
*
* Since dpme is assumed to be the same size as the physical sector size,
* support is limited to 512-byte sector devices!
*/
struct dpme {
uint16_t dpme_signature;
uint16_t dpme_reserved_1;
uint32_t dpme_map_entries;
uint32_t dpme_pblock_start;
uint32_t dpme_pblocks;
char dpme_name[DPISTRLEN]; /* name of partition */
char dpme_type[DPISTRLEN]; /* type of partition */
uint32_t dpme_lblock_start;
uint32_t dpme_lblocks;
uint32_t dpme_flags;
#define DPME_DISKDRIVER (1<<9)
#define DPME_CHAINABLE (1<<8)
#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;
uint32_t dpme_boot_bytes;
uint8_t *dpme_load_addr;
uint8_t *dpme_load_addr_2;
uint8_t *dpme_goto_addr;
uint8_t *dpme_goto_addr_2;
uint32_t dpme_checksum;
char dpme_process_id[16];
uint32_t dpme_boot_args[32];
uint32_t dpme_reserved_3[62];
};
#endif /* __dpme__ */
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