[PATCH 0/5] arm64: update/clarify/relax Image and FDT placement rules

Mark Rutland mark.rutland at arm.com
Tue Mar 10 04:21:03 PDT 2015

Hi Ard,

On Tue, Mar 10, 2015 at 10:51:03AM +0000, Ard Biesheuvel wrote:
> On 3 March 2015 at 12:03, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
> > This series came about after Mark Rutland brought up the fact that the current
> > FDT placement logic used by the EFI stub is flawed. But actually, it turned out
> > that the documentation for both the Image and FDT placement was incorrect as
> > well, or confusing at the very least.
> >
> > So this series does two things:
> > - It relaxes the FDT placement requirements, and updates the documentation and
> >   EFI stub FDT placement logic accordingly.
> > - It clarifies the Image placement requirements in the documentation, and brings
> >   the EFI stub Image placement logic in line with it
> >
> Anyone care to comment on these patches?

Sorry; I'd been intending to look at these but haven't yet had the
chance to give them a thorough review. From my glances so far they look
good, though.

I'll try to give this a proper look shortly.


> If we prefer not to use the fixmap region for the FDT,  the latter
> issue should be addressed in a different way.

I'm quite keen on using the fixmap for the FDT. It makes matters simpler
for other bootloaders too, and means we can do more thorough sanity
checking from C code (which is easier than in asm).


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