Hi,
On Wed, Jan 13, 2010 at 04:02:10PM +0100, Arno Steffen wrote:
To make a more stable system I want to put a second reduced linux (kernel/rootfs) onto flash memory. This should be boot automatically, if #1 fails for any reason. I tried to add this in bootcmd, but execution will be interuppted if the first bootm failes. Is there any chance to do so?
yes, it is possible. You should provide more information about your system and what you already tried.
In my board, i have a rather crude approach for the actual boot command: "run xilinxload&&bootm 0x80000;update;reset"
If either of xilinxload [which configures an FPGA] or bootm fails, the update command is executed to allow updating the firmware and after update a reset is performed. This works for me on a coldfire, so in theory it should be possible to replace "update" by another "bootm...".
Using bootcount on systems supporting it is a much better solution, unfortunately it is not yet implemented for coldfire.
(maybe it is even possible to compile this into bootloader, in case uboot environment gets corrupted/misconfigured)
IIRC there is a read-only option for the environment.
Regards, Wolfgang