On 7/1/21 12:07 PM, Teresa Remmet wrote:
Hi
[...]
Am Donnerstag, den 01.07.2021, 01:08 +0200 schrieb Marek Vasut:
In case the iMX8M boot from eMMC boot partition and the primary image
is corrupted, the BootROM is capable of starting a secondary image in
the other eMMC boot partition as a fallback.
I would like to ask a more general question. As I could not find
information about that. What are the criteria for the BootROM to
consider a image as corrupted?
I remember on other platforms with NAND where it was a erased page or
too many bitflips. What is it here with eMMC?
I didn't find much information on the unsigned images, so there I
suspect it is just that parsing the IVT header fails, the DCD tag is
missing, something along those lines. There is no checksum, so if there
is a bitflip in the image itself, I can imagine it would go undetected.
At least in the SPL part of flash.bin, the rest is fitImage and that has
checksum.
For signed images, if there is a bitflip, the signature would no longer
be valid, so this could be used to detect image corruption.
Maybe Peng (on CC) can clarify this better ?
[...]
