Hi Prafulla (and the list)!
I'm wondering a bit how Sheevaplug handles the U-boot environment area. On OpenRD base it's stored on the NAND flash, and is protected by a 4-bit ECC as required when read by the boot prom - it just goes together with the rest of the u-boot image.
The Marvell-supplied 1.1.4 version has code to handle this (basically switches to Reed-Solomon when reading/saving the environment), but it doesn't work with upstream U-boot. If I disable ECC altogether (in kirkwood_nand.c) I can read the environment, but since U-boot doesn't use Reed-Solomon, the soft ECC option doesn't cut it.
Is the situation the same with sheevaplug? I see there are patches for OpenOCD to handle the same thing there,
http://lists.berlios.de/pipermail/openocd-development/2009-May/006413.html
so perhaps something similar is bound for U-boot as well?
// Simon