[U-Boot] altbootcmd and failbootcmd

[Detlev Zundel]

Hi Thomas,

> I already have configured and built and have running u-boot and booting
> Linux on my custom MPC8313 based board, all ok so far.

Excellent.

> I am now trying to enable the altbootcmd and failbootcmd features so in
> the event of a image failure or non linux boot I can reboot to a known
> working image set.

The easy way is to put multiple boot commands in sequence - if one
returns because of a failure, the next one will run ;)

> I have tried setting CONFIG_POST and get "__POST_WORD_ADDR currently not
> implemented for this platform". How do I implement/set this ?

What U-Boot version do you use?  I cannot find a reference to this in
current code.

Apart from that: You first have to find a storage space to store the
post word.  This storage needs to survive a reset of the system.
Depending if that is reachable through regular memory access, you only
have to define __POST_WORD_ADDR.  In any other case you would need to
implement a setter/getter for that word yourself.

> I have tried setting CONFIG_BOOTCOUNT_LIMIT and get message error
> QE_MURAM_SIZE undeclared. Any ideas on this one ?

The code seems to have bugs - now go and find them.  Or rather try a
more recent version of U-Boot ;)  

Cheers
  Detlev

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