2 * (C) Copyright 2008 Semihalf
4 * (C) Copyright 2000-2006
5 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
7 * See file CREDITS for list of people who contributed to this
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.
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.
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,
27 # include <watchdog.h>
34 unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
36 int image_check_hcrc (image_header_t *hdr)
39 ulong len = image_get_header_size ();
40 image_header_t header;
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);
46 hcrc = crc32 (0, (unsigned char *)&header, len);
48 return (hcrc == image_get_hcrc (hdr));
51 int image_check_dcrc (image_header_t *hdr)
53 ulong data = image_get_data (hdr);
54 ulong len = image_get_data_size (hdr);
55 ulong dcrc = crc32 (0, (unsigned char *)data, len);
57 return (dcrc == image_get_dcrc (hdr));
60 int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz)
63 ulong len = image_get_data_size (hdr);
64 ulong data = image_get_data (hdr);
66 #if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
68 ulong edata = cdata + len;
70 while (cdata < edata) {
71 ulong chunk = edata - cdata;
75 dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk);
81 dcrc = crc32 (0, (unsigned char *)data, len);
84 return (dcrc == image_get_dcrc (hdr));
87 int getenv_verify (void)
89 char *s = getenv ("verify");
90 return (s && (*s == 'n')) ? 0 : 1;