[U-Boot] Firmware upgrade possibilites technikes in uboot.

[Wolfgang Denk]

Dear Bas Mevissen,

In message <79b14f2465df4acec1e67a710d13ce63 at localhost> you wrote:
> 
> > Note that this does not protect agains the first BSP 
> > being buggy once booted, though, but there's little one can do against
> > this.
> > 
> 
> Even then, there is a lot you can do. For example, U-Boot can detect being
> started by a watchdog reset, find out what image was started previously,
> mark it
> invalid and take the other one.
> 
> It is just a matter of how much effort one wants to spend. U-Boot is a
> rich boot loader that can easily be extended to your needs.

Actually you don;t even have to extend if for this - it's supported
out of the box (at least on several architectures); see the
"bootcount" feature =>
http://www.denx.de/wiki/view/DULG/UBootBootCountLimit

Best regards,

Wolfgang Denk

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