[U-Boot] [PATCH] ARM: tegra: restrict usable RAM size further

[Stephen Warren <swarren@wwwdotorg.org>]

On 07/30/2015 01:00 PM, Simon Glass wrote:
> Hi Stephen,
>
> On 30 July 2015 at 12:47, Stephen Warren <swarren@wwwdotorg.org> wrote:
...
>> At least initially, we're targeting booting the system with the same
>> bootloader that L4T and Android use for unification. U-Boot runs after the
>> base security/... environment is set up to provide a flexible user
>> experience for untrusted OS loading. Hopefully this won't make flashing a
>> system too much more complex, but there will inevitably be some differences.
>> Hopefully it'll get mostly hidden by tegra-uboot-flasher or some other tool.
>>
>> At some point I hope we'll be able to get U-Boot to act as the first stage
>> bootloader rather than just the non-secure bootloader. However, that
>> requires a lot more work so certainly isn't something that's in the first
>> round of Tegra210 support.
>
> Thanks for the explanation. Booting ARM devices might get as hard as
> x86 if we try really hard. Maybe we can add some run-time services as
> well...good luck!

Well, at least PSCI is required by the ARM64 kernel now I believe, and 
there's plenty of push for ACPI in some environments too, so I expect 
the complexity will indeed converge!