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arm: mvebu: Check for kwbimage data checksum

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Last 4 bytes of kwbimage boot image is checksum. Verify it via the new
spl_check_board_image() function which is called by U-Boot SPL after
loading kwbimage.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2022-01-14 14:31:41 +01:00 committed by Stefan Roese
parent c10939d8a1
commit 402e84ee88
1 changed files with 27 additions and 0 deletions
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27
arch/arm/mach-mvebu/spl.c
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@ -99,6 +99,33 @@ u32 spl_mmc_boot_mode(const u32 boot_device)
}
#endif
static u32 checksum32(void *start, u32 len)
{
u32 csum = 0;
u32 *p = start;
while (len > 0) {
csum += *p++;
len -= sizeof(u32);
};
return csum;
}
int spl_check_board_image(struct spl_image_info *spl_image,
const struct spl_boot_device *bootdev)
{
u32 csum = *(u32 *)(spl_image->load_addr + spl_image->size - 4);
if (checksum32((void *)spl_image->load_addr,
spl_image->size - 4) != csum) {
printf("ERROR: Invalid data checksum in kwbimage\n");
return -EINVAL;
}
return 0;
}
int spl_parse_board_header(struct spl_image_info *spl_image,
const struct spl_boot_device *bootdev,
const void *image_header, size_t size)