[U-Boot] RFC: Aligning arch initialisation sequences

[Mike Frysinger <vapier@gentoo.org>]

On Friday, November 12, 2010 23:16:07 Graeme Russ wrote:
> On 10/11/10 10:35, Mike Frysinger wrote:
> > On Sunday, November 07, 2010 05:06:26 Graeme Russ wrote:
> >> Should all architectures strive to look as much like one another as
> >> possible? Should we accept that maybe this particular issue be thrown in
> >> the too hard basket?
> > 
> > imo, we should strive to have these things in one common place and not
> > just have the different files look the sam
> 
> I was afraid someone would say that. I've been having a look and a think
> about the situation for x86, and I cannot come up with a sane way to
> emulate the way the global data pointer is handled by the other arches.
> 
> I essence, the gd pointer is a unique global variable available prior to
> relocation. On all other arches, this is achieved by using a reserved
> register which I do not have the luxury of on x86 :(
> 
> Unless I can resolve this, I cannot move x86 in line with the other arches
> (i.e. init functions can only be done after relocation).
> 
> I'll keep thinking about a possible solution

i dont think the first cut needs to go all the way.  if you want to start 
small with unifying post-reloc, that's OK too.  and probably a lot easier to 
git bisect in case things go wrong.
-mike
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