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ArmPkg/ArmMmuLib: AARCH64: add support for modifying only permissions

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Since the new DXE page protection for PE/COFF images may invoke
EFI_CPU_ARCH_PROTOCOL.SetMemoryAttributes() with only permission
attributes set, add support for this in the AARCH64 MMU code.

Move the EFI_MEMORY_CACHETYPE_MASK macro to a shared location between
CpuDxe and ArmMmuLib so we don't have to introduce yet another
definition.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
This commit is contained in:
Ard Biesheuvel
2017-02-15 17:11:56 +00:00
parent 0a9d732c91
commit e0307a7dad
3 changed files with 66 additions and 35 deletions
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4
ArmPkg/Include/Library/ArmLib.h
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@@ -26,6 +26,10 @@
#error "Unknown chipset."
#endif
#define EFI_MEMORY_CACHETYPE_MASK (EFI_MEMORY_UC | EFI_MEMORY_WC | \
EFI_MEMORY_WT | EFI_MEMORY_WB | \
EFI_MEMORY_UCE)
/**
* The UEFI firmware must not use the ARM_MEMORY_REGION_ATTRIBUTE_NONSECURE_* attributes.
*