[PATCH 0/3] patches to allow DTB to be appended to the ARM zImage
Nicolas Pitre
nicolas.pitre at linaro.org
Mon Jun 13 01:45:28 EST 2011
On Sun, 12 Jun 2011, Russell King - ARM Linux wrote:
> On Sun, Jun 12, 2011 at 05:01:22PM +0200, Arnd Bergmann wrote:
> > Of course it should override the device tree, I'm not arguing that.
> > All I'm saying is that we don't need to special-case this or support
> > both formats once the kernel is there as long as we move the information
> > into appropriate DT-representation of the same data.
>
> You're arguing for it to be parsed by whatever fragment of assembly code
> we have to place around the zImage to merge it into DT.
>
> And yes, it's going to have to be assembly code because we don't have a
> C environment at that point which can run in a relocatable way.
The prototype patch translating ATAGs into DT defer that processing to C
code. Doing that in assembly is of course madness.
Nicolas
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