[U-Boot] bootcount support on arm/kirkwood

[Wolfgang Denk]

Dear Prafulla Wadaskar,

In message <73173D32E9439E4ABB5151606C3E19E202DD54DE86 at SC-VEXCH1.marvell.com> you wrote:
>  
> > I searched for some space on this CPU for implementing this 
> > feature, but could not find any (at least 4 bytes = 1 
> > register), which not lost his value on a reset of this CPU.
> There is reset counter register on Kirkwood which counts the time for which H/w Reset is pressed-n-hold. This is generally used to trigger "Factory Reset" Kind of function using reset key.
> 
> I don't think you are searching for the same. Do you?

No, he doesn't. He needs a register that is guaranteed to keep it''s
values across a processor reset.

> BTW: What's your end use case?

The boot counter counts the number of (failed) boot attempts (i. e. processor
resets minus one) after power on. See
http://www.denx.de/wiki/view/DULG/UBootBootCountLimit

Best regards,

Wolfgang Denk

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