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1 | /* |
2 | * (C) Copyright 2008 Semihalf | |
3 | * | |
4 | * (C) Copyright 2000-2006 | |
5 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
6 | * | |
7 | * See file CREDITS for list of people who contributed to this | |
8 | * project. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License as | |
12 | * published by the Free Software Foundation; either version 2 of | |
13 | * the License, or (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
23 | * MA 02111-1307 USA | |
24 | */ | |
25 | #ifndef USE_HOSTCC | |
26 | # include <common.h> | |
27 | # include <watchdog.h> | |
28 | #else | |
29 | # include "mkimage.h" | |
30 | #endif | |
31 | ||
32 | #include <image.h> | |
33 | ||
34 | unsigned long crc32 (unsigned long, const unsigned char *, unsigned int); | |
35 | ||
36 | int image_check_hcrc (image_header_t *hdr) | |
37 | { | |
38 | ulong hcrc; | |
39 | ulong len = image_get_header_size (); | |
40 | image_header_t header; | |
41 | ||
42 | /* Copy header so we can blank CRC field for re-calculation */ | |
43 | memmove (&header, (char *)hdr, image_get_header_size ()); | |
44 | image_set_hcrc (&header, 0); | |
45 | ||
46 | hcrc = crc32 (0, (unsigned char *)&header, len); | |
47 | ||
48 | return (hcrc == image_get_hcrc (hdr)); | |
49 | } | |
50 | ||
51 | int image_check_dcrc (image_header_t *hdr) | |
52 | { | |
53 | ulong data = image_get_data (hdr); | |
54 | ulong len = image_get_data_size (hdr); | |
55 | ulong dcrc = crc32 (0, (unsigned char *)data, len); | |
56 | ||
57 | return (dcrc == image_get_dcrc (hdr)); | |
58 | } | |
59 | ||
60 | int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz) | |
61 | { | |
62 | ulong dcrc = 0; | |
63 | ulong len = image_get_data_size (hdr); | |
64 | ulong data = image_get_data (hdr); | |
65 | ||
66 | #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG) | |
67 | ulong cdata = data; | |
68 | ulong edata = cdata + len; | |
69 | ||
70 | while (cdata < edata) { | |
71 | ulong chunk = edata - cdata; | |
72 | ||
73 | if (chunk > chunksz) | |
74 | chunk = chunksz; | |
75 | dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk); | |
76 | cdata += chunk; | |
77 | ||
78 | WATCHDOG_RESET (); | |
79 | } | |
80 | #else | |
81 | dcrc = crc32 (0, (unsigned char *)data, len); | |
82 | #endif | |
83 | ||
84 | return (dcrc == image_get_dcrc (hdr)); | |
85 | } | |
86 | ||
87 | int getenv_verify (void) | |
88 | { | |
89 | char *s = getenv ("verify"); | |
90 | return (s && (*s == 'n')) ? 0 : 1; | |
91 | } |