[U-Boot] [PATCH] powerpc: do not fixup NULL ptrs
Wolfgang Denk
wd at denx.de
Thu Nov 4 13:46:17 CET 2010
Dear Joakim Tjernlund,
In message <OF18CA6215.DC3A539B-ONC12577D1.00439A8B-C12577D1.0043BB01 at transmode.se> you wrote:
>
> > What exactly is a "soft reset" in U-Boot? And how would you perform
> > one?
>
> Not in u-boot, but Linux or a privileged linux app. could.
Could do what? Modify the memory map such that the Flash is mapped
as it was (eventually) when U-Boot is running, and then jump right in
the middle of nowhere?
That would be invoking undefined behaviour in it's purest form.
Anything can happen then.
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
Hindsight is an exact science.
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