[U-Boot] Checking validity of rootfs in NAND-Flash

[Harald.Vollmer]

Hello everybody,

in my project, u-boot (2009.11) loads a large jffs2-rootfs image (80 MB, with an attached crc32-checksum) from SD-card into a NAND-Flash.
To ensure the validity of the rootfs, i let u-boot then clear the RAM-part, read back the rootfs from NAND into RAM, do a crc32 checksum over it and compare this
checksum with the crc32- checksum that was attached to the image.
This validity check takes about 70 seconds. Do you know a faster/better way of checking the validity?

Thanks in advance,
Harald Vollmer

[Wolfgang Denk]

Dear Harald.Vollmer at tieto.com,

Post by Harald.Vollmer
in my project, u-boot (2009.11) loads a large jffs2-rootfs image (80 MB, w
ith an attached crc32-checksum) from SD-card into a NAND-Flash.
To ensure the validity of the rootfs, i let u-boot then clear the RAM-part,
read back the rootfs from NAND into RAM, do a crc32 checksum over it and c
ompare this
checksum with the crc32- checksum that was attached to the image.
This validity check takes about 70 seconds. Do you know a faster/better way
of checking the validity?

Please make sure your line length does not exceed some 70 characters
or so. Thanks.


I smell this is on an ARM system? In this case you should update and
use a more recent version of U-Boot, where we have support for
caches. This usually helps a _lot_.

Best regards,

Wolfgang Denk