1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
/* *********************************************************************
* Broadcom Common Firmware Environment (CFE)
*
* Boot Block File: cfe_bootblock.h
*
* The structure of the boot block used on block-style devices
* like disks and CDROMs
*
* Author: Mitch Lichtenberg (mpl@broadcom.com)
*
*********************************************************************
*
* Copyright 2000,2001,2002,2003
* Broadcom Corporation. All rights reserved.
*
* This software is furnished under license and may be used and
* copied only in accordance with the following terms and
* conditions. Subject to these conditions, you may download,
* copy, install, use, modify and distribute modified or unmodified
* copies of this software in source and/or binary form. No title
* or ownership is transferred hereby.
*
* 1) Any source code used, modified or distributed must reproduce
* and retain this copyright notice and list of conditions
* as they appear in the source file.
*
* 2) No right is granted to use any trade name, trademark, or
* logo of Broadcom Corporation. The "Broadcom Corporation"
* name may not be used to endorse or promote products derived
* from this software without the prior written permission of
* Broadcom Corporation.
*
* 3) THIS SOFTWARE IS PROVIDED "AS-IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, ANY IMPLIED
* WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT
* SHALL BROADCOM BE LIABLE FOR ANY DAMAGES WHATSOEVER, AND IN
* PARTICULAR, BROADCOM SHALL NOT BE LIABLE FOR DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE), EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
********************************************************************* */
/*
* CFE boot block, modeled loosely on Alpha.
*
* It consists of:
*
* BSD disk label
* <blank space>
* Boot block info (5 u_int_64s)
*
* The boot block portion looks like:
*
*
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | BOOT_MAGIC_NUMBER |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Flags | Reserved | Vers | Header Checksum |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Secondary Loader Location (bytes) |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Loader Checksum | Size of loader (bytes) |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* | Reserved | Architecture Information |
* +-------+-------+-------+-------+-------+-------+-------+-------+
*
* Boot block fields should always be read as 64-bit numbers.
*
*/
struct boot_block {
uint64_t bb_data[64]; /* data (disklabel, also as below) */
};
#define bb_magic bb_data[59] /* magic number */
#define bb_hdrinfo bb_data[60] /* header checksum, ver, flags */
#define bb_secstart bb_data[61] /* secondary start (bytes) */
#define bb_secsize bb_data[62] /* secondary size (bytes) */
#define bb_archinfo bb_data[63] /* architecture info */
#define BOOT_BLOCK_OFFSET 0 /* offset of boot block. */
#define BOOT_BLOCK_BLOCKSIZE 512 /* block size for sec. size/start,
* and for boot block itself
*/
#define BOOT_BLOCK_SIZE 40 /* 5 64-bit words */
/*
* This is the highest block number that we look at when
* searching for a valid boot block
*/
#define BOOT_BLOCK_MAXLOC 16
/*
* Fields within the boot block
*/
#define _U64(x) ((uint64_t) x)
#define BOOT_MAGIC_NUMBER _U64(0x43465631424f4f54)
#define BOOT_HDR_CHECKSUM_MASK _U64(0x00000000FFFFFFFF)
#define BOOT_HDR_VER_MASK _U64(0x000000FF00000000)
#define BOOT_HDR_VER_SHIFT 32
#define BOOT_HDR_FLAGS_MASK _U64(0xFF00000000000000)
#define BOOT_SECSIZE_MASK _U64(0x00000000FFFFFFFF)
#define BOOT_DATA_CHECKSUM_MASK _U64(0xFFFFFFFF00000000)
#define BOOT_DATA_CHECKSUM_SHIFT 32
#define BOOT_ARCHINFO_MASK _U64(0x00000000FFFFFFFF)
#define BOOT_HDR_VERSION 1
#define CHECKSUM_BOOT_DATA(data,len,cksum) \
do { \
uint32_t *_ptr = (uint32_t *) (data); \
uint32_t _cksum; \
int _i; \
\
_cksum = 0; \
for (_i = 0; \
_i < ((len) / sizeof (uint32_t)); \
_i++) \
_cksum += _ptr[_i]; \
*(cksum) = _cksum; \
} while (0)
|
