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Diffstat (limited to 'sbin/pdisk/dpme.h')
| -rw-r--r-- | sbin/pdisk/dpme.h | 219 |
1 files changed, 219 insertions, 0 deletions
diff --git a/sbin/pdisk/dpme.h b/sbin/pdisk/dpme.h new file mode 100644 index 00000000000..e3d7084dfe5 --- /dev/null +++ b/sbin/pdisk/dpme.h @@ -0,0 +1,219 @@ +// +// dpme.h - Disk Partition Map Entry (dpme) +// +// Written by Eryk Vershen (eryk@apple.com) +// +// 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__ + +#include "bitfield.h" + +// +// Defines +// +#define BLOCK0_SIGNATURE 0x4552 /* Signature value. */ + +#define DPISTRLEN 32 +#define DPME_SIGNATURE 0x504D + +// A/UX only stuff (tradition!) +#define dpme_bzb dpme_boot_args +#define BZBMAGIC 0xABADBABE /* BZB magic number */ +#define FST ((u8) 0x1) /* standard UNIX FS */ +#define FSTEFS ((u8) 0x2) /* Autorecovery FS */ +#define FSTSFS ((u8) 0x3) /* Swap FS */ + + +// +// 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; +#if 0 + u32 dpme_reserved_2 : 23 ; /* Bit 9 through 31. */ + u32 dpme_os_specific_1 : 1 ; /* Bit 8. */ + u32 dpme_os_specific_2 : 1 ; /* Bit 7. */ + u32 dpme_os_pic_code : 1 ; /* Bit 6. */ + u32 dpme_writable : 1 ; /* Bit 5. */ + u32 dpme_readable : 1 ; /* Bit 4. */ + u32 dpme_bootable : 1 ; /* Bit 3. */ + u32 dpme_in_use : 1 ; /* Bit 2. */ + u32 dpme_allocated : 1 ; /* Bit 1. */ + u32 dpme_valid : 1 ; /* Bit 0. */ +#endif + 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; + +#define dpme_diskdriver_set(p, v) bitfield_set(&p->dpme_flags, 9, 1, v) +#define dpme_chainable_set(p, v) bitfield_set(&p->dpme_flags, 8, 1, v) + +#define dpme_os_specific_1_set(p, v) bitfield_set(&p->dpme_flags, 8, 1, v) +#define dpme_os_specific_2_set(p, v) bitfield_set(&p->dpme_flags, 7, 1, v) +#define dpme_os_pic_code_set(p, v) bitfield_set(&p->dpme_flags, 6, 1, v) +#define dpme_writable_set(p, v) bitfield_set(&p->dpme_flags, 5, 1, v) +#define dpme_readable_set(p, v) bitfield_set(&p->dpme_flags, 4, 1, v) +#define dpme_bootable_set(p, v) bitfield_set(&p->dpme_flags, 3, 1, v) +#define dpme_in_use_set(p, v) bitfield_set(&p->dpme_flags, 2, 1, v) +#define dpme_allocated_set(p, v) bitfield_set(&p->dpme_flags, 1, 1, v) +#define dpme_valid_set(p, v) bitfield_set(&p->dpme_flags, 0, 1, v) + +#define dpme_diskdriver_get(p) bitfield_get(p->dpme_flags, 9, 1) +#define dpme_chainable_get(p) bitfield_get(p->dpme_flags, 8, 1) + +#define dpme_os_specific_1_get(p) bitfield_get(p->dpme_flags, 8, 1) +#define dpme_os_specific_2_get(p) bitfield_get(p->dpme_flags, 7, 1) +#define dpme_os_pic_code_get(p) bitfield_get(p->dpme_flags, 6, 1) +#define dpme_writable_get(p) bitfield_get(p->dpme_flags, 5, 1) +#define dpme_readable_get(p) bitfield_get(p->dpme_flags, 4, 1) +#define dpme_bootable_get(p) bitfield_get(p->dpme_flags, 3, 1) +#define dpme_in_use_get(p) bitfield_get(p->dpme_flags, 2, 1) +#define dpme_allocated_get(p) bitfield_get(p->dpme_flags, 1, 1) +#define dpme_valid_get(p) bitfield_get(p->dpme_flags, 0, 1) + + +// A/UX only data structures (sentimental reasons?) + +// Alternate block map (aka bad block remaping) [Never really used] +struct abm /* altblk map info stored in bzb */ +{ + u32 abm_size; /* size of map in bytes */ + u32 abm_ents; /* number of used entries */ + u32 abm_start; /* start of altblk map */ +}; +typedef struct abm ABM; + +// BZB (Block Zero Block, but I can't remember the etymology) +// Where &dpme_boot_args[0] is actually the address of a struct bzb +// kludge to get around alignment junk +struct bzb /* block zero block format */ +{ + u32 bzb_magic; /* magic number */ + u8 bzb_cluster; /* Autorecovery cluster grouping */ + u8 bzb_type; /* FS type */ + u16 bzb_inode; /* bad block inode number */ + u32 bzb_flags; +#if 0 + u16 bzb_root:1, /* FS is a root FS */ + bzb_usr:1, /* FS is a usr FS */ + bzb_crit:1, /* FS is a critical FS */ + bzb_rsrvd:8, /* reserved for later use */ + bzb_slice:5; /* slice number to associate with plus one */ + u16 bzb_filler; /* pad bitfield to 32 bits */ +#endif + u32 bzb_tmade; /* time of FS creation */ + u32 bzb_tmount; /* time of last mount */ + u32 bzb_tumount; /* time of last umount */ + ABM bzb_abm; /* altblk map info */ + u32 bzb_fill2[7]; /* for expansion of ABM (ha!ha!) */ + u8 bzb_mount_point[64]; /* default mount point name */ +}; +typedef struct bzb BZB; + +#define bzb_root_set(p, v) bitfield_set(&p->bzb_flags, 31, 1, v) +#define bzb_usr_set(p, v) bitfield_set(&p->bzb_flags, 30, 1, v) +#define bzb_crit_set(p, v) bitfield_set(&p->bzb_flags, 29, 1, v) +#define bzb_slice_set(p, v) bitfield_set(&p->bzb_flags, 20, 5, v) + +#define bzb_root_get(p) bitfield_get(p->bzb_flags, 31, 1) +#define bzb_usr_get(p) bitfield_get(p->bzb_flags, 30, 1) +#define bzb_crit_get(p) bitfield_get(p->bzb_flags, 29, 1) +#define bzb_slice_get(p) bitfield_get(p->bzb_flags, 20, 5) + + +// +// Global Constants +// + + +// +// Global Variables +// + + +// +// Forward declarations +// + +#endif /* __dpme__ */ |