Leonid,
-----Original Message----- From: u-boot-users-bounces@lists.sourceforge.net [mailto:u-boot-users- bounces@lists.sourceforge.net] On Behalf Of Leonid Sent: Thursday, May 01, 2008 1:05 PM To: u-boot-users@lists.sourceforge.net Subject: [U-Boot-Users] U-Boot environment for NAND booting scheme
The problem is that any time u-boot image is updated, its environment
is
lost which is not convenient if the environment differs from default
one
significantly.
One approach from what we did on OMAP: since the smallest erase unit on NAND is a block, reserve as many blocks required to store U-Boot, the Env gets a block of it's own. And the rest go for kernel and Filesystem. So, we can update u-boot without loosing env vars, and env vars without loosing u-boot etc.
Can I put environment elsewhere on NAND flash and what is bad in doing so?
Other than loosing a bit of space, I don't see any as long as u would like to organize them as per your need - e.g. if the board is never going to have env vars change you can save space and not allot one full block for it. It is really usecase driven IMHO.
Regards, Nishanth Menon