Revision: 17016
http://sourceforge.net/p/edk2/code/17016
Author: lgao4
Date: 2015-03-06 02:58:01 +0000 (Fri, 06 Mar 2015)
Log Message:
-----------
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 <[email protected]>
Reviewed-by: Liming Gao <[email protected]>
Modified Paths:
--------------
trunk/edk2/MdeModulePkg/Core/Dxe/Mem/Imem.h
Modified: trunk/edk2/MdeModulePkg/Core/Dxe/Mem/Imem.h
===================================================================
--- trunk/edk2/MdeModulePkg/Core/Dxe/Mem/Imem.h 2015-03-06 02:57:11 UTC (rev
17015)
+++ trunk/edk2/MdeModulePkg/Core/Dxe/Mem/Imem.h 2015-03-06 02:58:01 UTC (rev
17016)
@@ -22,6 +22,15 @@
#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT (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
///
/// For genric EFI machines make the default allocations 4K aligned
------------------------------------------------------------------------------
Dive into the World of Parallel Programming The Go Parallel Website, sponsored
by Intel and developed in partnership with Slashdot Media, is your hub for all
things parallel software development, from weekly thought leadership blogs to
news, videos, case studies, tutorials and more. Take a look and join the
conversation now. http://goparallel.sourceforge.net/
_______________________________________________
edk2-commits mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/edk2-commits
