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MdeModulePkg: use 64 KB granularity for runtime allocations on AArch64 

On AArch64, the OS can choose to run with a page size of 64 KB,
making it cumbersome to deal with UEFI reserved memory regions
whose boundaries are not 64 KB aligned.

So increase the allocation granularity for runtime regions to
64 KB.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Liming Gao <liming.gao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17016 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel 2015-03-06 02:58:01 +00:00 committed by lgao4
parent 6860b92c84
commit 15290510db
1 changed files with 9 additions and 0 deletions
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9
MdeModulePkg/Core/Dxe/Mem/Imem.h
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@ -22,6 +22,15 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE * 2) #define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (EFI_PAGE_SIZE * 2)
#define DEFAULT_PAGE_ALLOCATION (EFI_PAGE_SIZE * 2) #define DEFAULT_PAGE_ALLOCATION (EFI_PAGE_SIZE * 2)
#elif defined (MDE_CPU_AARCH64)
///
/// 64-bit ARM systems allow the OS to execute with 64 KB page size,
/// so for improved interoperability with the firmware, align the
/// runtime regions to 64 KB as well
///
#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (SIZE_64KB)
#define DEFAULT_PAGE_ALLOCATION (EFI_PAGE_SIZE)
#else #else
/// ///
/// For genric EFI machines make the default allocations 4K aligned /// For genric EFI machines make the default allocations 4K aligned