[U-Boot-Users] How to recover kernel and root file system if it crashes

[Wolfgang Denk]

In message <41483bfe0711271359x4315d9bbsc03a3ce88542c014 at mail.gmail.com> you wrote:
> 
> If kernel and / or root file system gets corrupted on target due to
> one of the following reasons
...
> If the CRC is bad or image header is bad i am loading secondary kernel image.

OK.

> How can we recover incase of root file system failure?

Use a watchdog that get's only triggered when your application starts
up correctly. Combine it with the boot counter feature.

> How do we let uboot know that the root file system didn't  come up properly.

By not resetting the boot counter by your application code, so after N
unseccesful boot attempts it will run the alternative boot command.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
O Staat!   Wie tief dir alle Besten fluchen!  Du bist kein Ziel.  Der
Mensch muß weiter suchen.                     - Christian Morgenstern