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

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.