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/*
* (C) Copyright 2008 Semihalf
*
* (C) Copyright 2000-2006
* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef USE_HOSTCC
# include <common.h>
# include <watchdog.h>
#else
# include "mkimage.h"
#endif
#include <image.h>
unsigned long crc32 (unsigned long, const unsigned char *, unsigned int);
int image_check_hcrc (image_header_t *hdr)
{
ulong hcrc;
ulong len = image_get_header_size ();
image_header_t header;
/* Copy header so we can blank CRC field for re-calculation */
memmove (&header, (char *)hdr, image_get_header_size ());
image_set_hcrc (&header, 0);
hcrc = crc32 (0, (unsigned char *)&header, len);
return (hcrc == image_get_hcrc (hdr));
}
int image_check_dcrc (image_header_t *hdr)
{
ulong data = image_get_data (hdr);
ulong len = image_get_data_size (hdr);
ulong dcrc = crc32 (0, (unsigned char *)data, len);
return (dcrc == image_get_dcrc (hdr));
}
int image_check_dcrc_wd (image_header_t *hdr, ulong chunksz)
{
ulong dcrc = 0;
ulong len = image_get_data_size (hdr);
ulong data = image_get_data (hdr);
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
ulong cdata = data;
ulong edata = cdata + len;
while (cdata < edata) {
ulong chunk = edata - cdata;
if (chunk > chunksz)
chunk = chunksz;
dcrc = crc32 (dcrc, (unsigned char *)cdata, chunk);
cdata += chunk;
WATCHDOG_RESET ();
}
#else
dcrc = crc32 (0, (unsigned char *)data, len);
#endif
return (dcrc == image_get_dcrc (hdr));
}
int getenv_verify (void)
{
char *s = getenv ("verify");
return (s && (*s == 'n')) ? 0 : 1;
}
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