[U-Boot] [PATCH 4/4] ARM: tegra210: gpu: configure WPR region

[Stephen Warren]

On 10/18/2015 10:57 PM, Alexandre Courbot wrote:
> T210's GPU secure firmware loading requires a write-protected region
> to be set up.
>
> This patch reserves the upper 256KB of RAM as the WPR region and locks
> it so the kernel can initiate secure firmware loading.

On T210, it's the responsibility of nvtboot (which runs before U-Boot) 
to set up any and all carve-outs. This code should not be necessary, and 
indeed I expect the registers it touches can't actually be programmed 
from U-Boot, which runs in non-secure mode after WPR is already locked.