[U-Boot] [PATCH 0/4] Tegra210 support for P2571

[Tom Warren]

Yes, it's a 32-bit T210 U-Boot.  T210 supports both AARCH32 and AARCH64.

A 64-bit build will follow, but I haven't figured out how to meld the 32-bit AVP SPL portion/build with the 64-bit CPU portion/build in one clean build command, so I'm building them separately and then fusing them together in a separate script.  If anyone has ideas on how to generate a hybrid 32-bit (AVP)/64-bit (A57) U-Boot binary in one fell swoop, I'm all ears. :)

Tom

> -----Original Message-----
> From: Stephen Warren [mailto:swarren at wwwdotorg.org]
> Sent: Wednesday, June 17, 2015 1:07 PM
> To: Tom Warren
> Cc: u-boot at lists.denx.de; Stephen Warren; Tom Warren
> Subject: Re: [U-Boot] [PATCH 0/4] Tegra210 support for P2571
> 
> On 06/03/2015 02:35 PM, Tom Warren wrote:
> > Adds support for Tegra210 SoC and P2571 NVIDIA board.
> > Largely based on T124/Venice2. This is a baseline patchset - more will
> > follow to make things more T210- specific as P2571 peripherals/devices
> > are brought up.
> 
> Does this add support for a 32-bit or a 64-bit U-Boot? Since T210 is a 64-bit CPU I
> would have expected a 64-bit U-Boot, yet:
> 
> a)
> 
> arch/arm/Kconfig contains:
> 
> config TEGRA
> ...
>          select CPU_V7
> 
> and this patch doesn't modify that.
> 
> b)
> 
> I can built an executable with these patches applied (after manually fixing up
> some merge problems) with an ARMv7 compiler, but not with an
> ARMv8 compiler.
> 
> I think that means this is a 32-bit port. We need a 64-bit port.
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