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

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