[U-Boot] [PATCH 6/6] powerpc: Add LINK_OFF calls in early C-code.

Joakim Tjernlund joakim.tjernlund at transmode.se
Wed Nov 24 12:04:15 CET 2010


>
> Scott Wood <scottwood at freescale.com> wrote on 2010/11/23 23:32:04:
> >
> > On Tue, 23 Nov 2010 23:14:06 +0100
> > Joakim Tjernlund <joakim.tjernlund at transmode.se> wrote:
> >
> > > Scott Wood <scottwood at freescale.com> wrote on 2010/11/23 22:20:58:
> > > > "load address" being pre-relocation?  Currently these must be equal
> > > > (which doesn't seem particularly burdensome).
> > >
> > > Yes, but in our case we update the boot in the field and we want to
> > > make that safer by having two uboot areas but we don't want to carry around
> > > two u-boot images.
> >
> > How about playing with BATs before entering C code, so that the image
> > always appears at the same effective address?
>
> hmm, never thought of that. The extra bonus would be that LINK_OFF should
> not be needed either.

After sleeping on it I realize that all direct accesses to the flash
such as getting the env. will need to be adjusted instead.

     Jocke



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