[U-Boot] [PATCH 8/9] armv8: mmu: Add a function to change mapping attributes

[Alexander Graf]

On 14/02/2017 04:45, York Sun wrote:
> Function mmu_change_region_attr() is added to change existing mapping
> with updated PXN, UXN and memory type. This is a break-before-make
> process during which the mapping becomes fault (invalid) before final
> attributres are set.

This is what we have the emergency tables for, no? Just switch to those, 
modify anything you like in the original tables, then switch back.


Alex