Subject: [PATCH v2] arm64: Allow for different DMA and CPU bus offsets

From: [email-masked] (Alexander Graf)
Date: Wed, 18 May 2016 18:16:05 +0200

On 05/18/2016 06:08 PM, Arnd Bergmann wrote:
> On Wednesday 18 May 2016 17:33:41 Alexander Graf wrote:
>>>> IIRC we don't own EL3 on there.
>>> Then how do you switch to AArch64?
>> You write into config.txt that you want to boot into AArch64 EL2 and the
>> raspberry pi firmware takes care of the rest.
>>
>>
> Have you tried telling the firmware that you'd like to boot into AArch64 EL3? ;-)

Yes, but then you don't get any SMP initialization (so we'd have to redo 
that in U-Boot, or port ATF) and you lose the usual workflow on defining 
how the hat device tree overlays work.

Overall, I think it's an interesting goal and you're more than happy to 
be my guest, but I think that spin tables are good enough for the device 
for now :). At least we'd be able to move people away from 32bit code.

Alex