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/* $OpenBSD: dpme.h,v 1.7 2016/01/17 14:28:25 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__
//
// Defines
//
#define BLOCK0_SIGNATURE 0x4552 /* i.e. 'ER' */
#define DPISTRLEN 32
#define DPME_SIGNATURE 0x504D /* i.e. 'PM' */
//
// Types
//
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned long u32;
// Physical block zero of the disk has this format
struct Block0 {
u16 sbSig; /* unique value for SCSI block 0 */
u16 sbBlkSize; /* block size of device */
u32 sbBlkCount; /* number of blocks on device */
u16 sbDevType; /* device type */
u16 sbDevId; /* device id */
u32 sbData; /* not used */
u16 sbDrvrCount; /* driver descriptor count */
u16 sbMap[247]; /* descriptor map */
};
typedef struct Block0 Block0;
// Where &sbMap[0] is actually an array DDMap[sbDrvrCount]
// kludge to get around alignment junk
struct DDMap {
u32 ddBlock; /* 1st driver's starting block (in sbBlkSize blocks!) */
u16 ddSize; /* size of 1st driver (512-byte blks) */
u16 ddType; /* system type (1 for Mac+) */
};
typedef struct DDMap DDMap;
// Each partition map entry (blocks 1 through n) has this format
struct dpme {
u16 dpme_signature ;
u16 dpme_reserved_1 ;
u32 dpme_map_entries ;
u32 dpme_pblock_start ;
u32 dpme_pblocks ;
char dpme_name[DPISTRLEN] ; /* name of partition */
char dpme_type[DPISTRLEN] ; /* type of partition */
u32 dpme_lblock_start ;
u32 dpme_lblocks ;
u32 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)
u32 dpme_boot_block ;
u32 dpme_boot_bytes ;
u8 *dpme_load_addr ;
u8 *dpme_load_addr_2 ;
u8 *dpme_goto_addr ;
u8 *dpme_goto_addr_2 ;
u32 dpme_checksum ;
char dpme_process_id[16] ;
u32 dpme_boot_args[32] ;
u32 dpme_reserved_3[62] ;
};
typedef struct dpme DPME;
//
// Global Constants
//
//
// Global Variables
//
//
// Forward declarations
//
#endif /* __dpme__ */
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