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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));
}
#ifndef USE_HOSTCC
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;
}
void memmove_wd (void *to, void *from, size_t len, ulong chunksz)
{
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
while (len > 0) {
size_t tail = (len > chunksz) ? chunksz : len;
WATCHDOG_RESET ();
memmove (to, from, tail);
to += tail;
from += tail;
len -= tail;
}
#else /* !(CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG) */
memmove (to, from, len);
#endif /* CONFIG_HW_WATCHDOG || CONFIG_WATCHDOG */
}
#endif /* USE_HOSTCC */
/**
* image_multi_count - get component (sub-image) count
* @hdr: pointer to the header of the multi component image
*
* image_multi_count() returns number of components in a multi
* component image.
*
* Note: no checking of the image type is done, caller must pass
* a valid multi component image.
*
* returns:
* number of components
*/
ulong image_multi_count (image_header_t *hdr)
{
ulong i, count = 0;
ulong *size;
/* get start of the image payload, which in case of multi
* component images that points to a table of component sizes */
size = (ulong *)image_get_data (hdr);
/* count non empty slots */
for (i = 0; size[i]; ++i)
count++;
return count;
}
/**
* image_multi_getimg - get component data address and size
* @hdr: pointer to the header of the multi component image
* @idx: index of the requested component
* @data: pointer to a ulong variable, will hold component data address
* @len: pointer to a ulong variable, will hold component size
*
* image_multi_getimg() returns size and data address for the requested
* component in a multi component image.
*
* Note: no checking of the image type is done, caller must pass
* a valid multi component image.
*
* returns:
* data address and size of the component, if idx is valid
* 0 in data and len, if idx is out of range
*/
void image_multi_getimg (image_header_t *hdr, ulong idx,
ulong *data, ulong *len)
{
int i;
ulong *size;
ulong offset, tail, count, img_data;
/* get number of component */
count = image_multi_count (hdr);
/* get start of the image payload, which in case of multi
* component images that points to a table of component sizes */
size = (ulong *)image_get_data (hdr);
/* get address of the proper component data start, which means
* skipping sizes table (add 1 for last, null entry) */
img_data = image_get_data (hdr) + (count + 1) * sizeof (ulong);
if (idx < count) {
*len = size[idx];
offset = 0;
tail = 0;
/* go over all indices preceding requested component idx */
for (i = 0; i < idx; i++) {
/* add up i-th component size */
offset += size[i];
/* add up alignment for i-th component */
tail += (4 - size[i] % 4);
}
/* calculate idx-th component data address */
*data = img_data + offset + tail;
} else {
*len = 0;
*data = 0;
}
}
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