1c33b4e6a4
<sys/bootblock.h>:
* Added definitions for the Master Boot Record (MBR) used by
a variety of systems (primarily i386), including the format
of the BIOS Parameter Block (BPB).
This information was cribbed from a variety of sources
including <sys/disklabel_mbr.h> which this is a superset of.
As part of this, some data structure elements and #defines
were renamed to be more "namespace friendly" and consistent
with other bootblocks and MBR documentation.
Update all uses of the old names to the new names.
<sys/disklabel_mbr.h>:
* Deprecated in favor of <sys/bootblock.h> (the latter is more
"host tool" friendly).
amd64 & i386:
* Renamed /usr/mdec/bootxx_dosfs to /usr/mdec/bootxx_msdos, to
be consistent with the naming convention of the msdosfs tools.
* Removed /usr/mdec/bootxx_ufs, as it's equivalent to bootxx_ffsv1
and it's confusing to have two functionally equivalent bootblocks,
especially given that "ufs" has multiple meanings (it could be
a synonym for "ffs", or the group of ffs/lfs/ext2fs file systems).
* Rework pbr.S (the first sector of bootxx_*):
+ Ensure that BPB (bytes 11..89) and the partition table
(bytes 446..509) do not contain code.
+ Add support for booting from FAT partitions if BOOT_FROM_FAT
is defined. (Only set for bootxx_msdos).
+ Remove "dummy" partition 3; if people want to installboot(8)
these to the start of the disk they can use fdisk(8) to
create a real MBR partition table...
+ Compile with TERSE_ERROR so it fits because of the above.
Whilst this is less user friendly, I feel it's important
to have a valid partition table and BPB in the MBR/PBR.
* Renamed /usr/mdec/biosboot to /usr/mdec/boot, to be consistent
with other platforms.
* Enable SUPPORT_DOSFS in /usr/mdec/boot (stage2), so that
we can boot off FAT partitions.
* Crank version of /usr/mdec/boot to 3.1, and fix some of the other
entries in the version file.
installboot(8) (i386):
* Read the existing MBR of the filesystem and retain the BIOS
Parameter Block (BPB) in bytes 11..89 and the MBR partition
table in bytes 446..509. (Previously installboot(8) would
trash those two sections of the MBR.)
mbrlabel(8):
* Use sys/lib/libkern/xlat_mbr_fstype.c instead of homegrown code
to map the MBR partition type to the NetBSD disklabel type.
Test built "make release" for i386, and new bootblocks verified to work
(even off FAT!).
175 lines
6.6 KiB
C
175 lines
6.6 KiB
C
/* $NetBSD: disklabel.h,v 1.3 2003/10/08 04:25:46 lukem Exp $ */
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/*
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* Copyright 2000, 2001
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* Broadcom Corporation. All rights reserved.
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*
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* This software is furnished under license and may be used and copied only
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* in accordance with the following terms and conditions. Subject to these
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* conditions, you may download, copy, install, use, modify and distribute
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* modified or unmodified copies of this software in source and/or binary
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* form. No title or ownership is transferred hereby.
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*
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* 1) Any source code used, modified or distributed must reproduce and
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* retain this copyright notice and list of conditions as they appear in
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* the source file.
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*
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* 2) No right is granted to use any trade name, trademark, or logo of
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* Broadcom Corporation. The "Broadcom Corporation" name may not be
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* used to endorse or promote products derived from this software
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* without the prior written permission of Broadcom Corporation.
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*
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* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
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* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL BROADCOM BE LIABLE
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* FOR ANY DAMAGES WHATSOEVER, AND IN PARTICULAR, BROADCOM SHALL NOT BE
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* LIABLE FOR DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE), EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/* from: $NetBSD: disklabel.h,v 1.4 2000/05/05 03:27:22 soren Exp */
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/*
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* Copyright (c) 1994 Christopher G. Demetriou
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christopher G. Demetriou.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _MACHINE_DISKLABEL_H_
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#define _MACHINE_DISKLABEL_H_
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#define LABELSECTOR 1 /* sector containing label */
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#define LABELOFFSET 0 /* offset of label in sector */
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#define MAXPARTITIONS 16
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#define RAW_PART 3
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#ifdef __NetBSD__
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/* Pull in MBR partition definitions. */
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#include <sys/bootblock.h>
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#ifndef __ASSEMBLER__
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#include <sys/dkbad.h>
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struct cpu_disklabel {
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struct mbr_partition dosparts[MBR_PART_COUNT];
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struct dkbad bad;
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};
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#endif
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#endif
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/*
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* CFE boot block, modeled loosely on Alpha.
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*
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* It consists of:
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*
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* BSD disk label
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* <blank space>
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* Boot block info (5 uint_64s)
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*
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* The boot block portion looks like:
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*
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*
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | BOOT_MAGIC_NUMBER |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | Flags | Reserved | Vers | Header Checksum |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | Secondary Loader Location (bytes) |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | Loader Checksum | Size of loader (bytes) |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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* | Reserved | Architecture Information |
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* +-------+-------+-------+-------+-------+-------+-------+-------+
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*
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* Boot block fields should always be read as 64-bit numbers.
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*
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*/
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struct boot_block {
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uint64_t bb_data[64]; /* data (disklabel, also as below) */
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};
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#define bb_magic bb_data[59] /* magic number */
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#define bb_hdrinfo bb_data[60] /* header checksum, ver, flags */
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#define bb_secstart bb_data[61] /* secondary start (bytes) */
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#define bb_secsize bb_data[62] /* secondary size (bytes) */
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#define bb_archinfo bb_data[63] /* architecture info */
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#define BOOT_BLOCK_OFFSET 0 /* offset of boot block. */
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#define BOOT_BLOCK_BLOCKSIZE 512 /* block size for sec. size/start,
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* and for boot block itself
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*/
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#define BOOT_BLOCK_SIZE 40 /* 5 64-bit words */
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#define BOOT_MAGIC_NUMBER 0x43465631424f4f54
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#define BOOT_HDR_CHECKSUM_MASK 0x00000000FFFFFFFF
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#define BOOT_HDR_VER_MASK 0x000000FF00000000
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#define BOOT_HDR_VER_SHIFT 32
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#define BOOT_HDR_FLAGS_MASK 0xFF00000000000000
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#define BOOT_SECSIZE_MASK 0x00000000FFFFFFFF
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#define BOOT_DATA_CHECKSUM_MASK 0xFFFFFFFF00000000
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#define BOOT_DATA_CHECKSUM_SHIFT 32
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#define BOOT_ARCHINFO_MASK 0x00000000FFFFFFFF
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#define BOOT_HDR_VERSION 1
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#define CHECKSUM_BOOT_BLOCK(bb,cksum) \
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do { \
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uint32_t *_ptr = (uint32_t *) (bb); \
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uint32_t _cksum; \
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int _i; \
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\
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_cksum = 0; \
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for (_i = 0; \
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_i < (BOOT_BLOCK_SIZE / sizeof (uint32_t)); \
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_i++) \
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_cksum += _ptr[_i]; \
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*(cksum) = _cksum; \
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} while (0)
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#define CHECKSUM_BOOT_DATA(data,len,cksum) \
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do { \
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uint32_t *_ptr = (uint32_t *) (data); \
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uint32_t _cksum; \
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int _i; \
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\
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_cksum = 0; \
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for (_i = 0; \
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_i < ((len) / sizeof (uint32_t)); \
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_i++) \
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_cksum += _ptr[_i]; \
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*(cksum) = _cksum; \
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} while (0)
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#endif /* _MACHINE_DISKLABEL_H_ */
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