[U-Boot] [PATCH 4/4] powerpc: Add LINK_OFF calls in early C-code.

[Scott Wood]

On Tue, 18 Jan 2011 21:06:34 +0100
Wolfgang Denk <wd at denx.de> wrote:

> Dear Joakim Tjernlund,
> 
> In message <OF287114D8.013B6E51-ONC125781C.00667DCD-C125781C.00673260 at transmode.se> you wrote:
> > boards which I don't think is possible. I do think my approach comes closest though.
> > I did try BATs but I didn't get very far.

What problems did you run into?

> 
> If we are talking about _all_ boards we have to keep a wider view.
> For example, on MPC8xx there are not BATs. Not to mention other
> architectures.

I don't see why MPC8xx's MMU couldn't be used for this, although it
might be a tight fit if you want to get everything into the pinned TLB
entries.

Should we be talking about all boards, if the only user of this so far
is on hardware that can do it in a less-intrusive way?

Another thing to keep in mind is that Joakim's approach also won't work
on all boards -- you need hardware that is capable of selecting from
different entry points, where the entry address itself changes rather
than flash banks being flipped around.

-Scott