Virtual uncached pages are simply pages that are aliased using mismatched
attributes, which is not allowed by the ARM architecture. So remove the
protocol and its implementation.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Current Arm CpuDxe driver uses EFI_MEMORY_WP for write protection,
according to UEFI spec, we should use EFI_MEMORY_RO for write protection.
The EFI_MEMORY_WP is the cache attribute instead of memory attribute.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Changing the attribute implies some cache management (clean & invalidate).
Preventing the cache management should improve the performance.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14568 6f19259b-4bc3-4df7-8a09-765794883524
- Fix the length used to set the GCD Memory Space attribute
- Print a warning message if the given length of a memory space region is not 4KB-aligned
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14562 6f19259b-4bc3-4df7-8a09-765794883524
Ard Biesheuvel
Jiewen Yao
Olivier Martin