| Marian Balakowicz | b97a2a0 | 2008-01-08 18:14:09 +0100 | [diff] [blame^] | 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 | } |