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ArmPkg/ArmLib: Added ConvertSectionAttributesToPageAttributes() 

This helper function converts the section attributes into their page equivalents.

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@14567 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Olivier Martin 2013-08-19 17:37:50 +00:00 committed by oliviermartin
parent 09e31226c3
commit 6adbd5b4d2
3 changed files with 26 additions and 12 deletions
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7
ArmPkg/Drivers/CpuDxe/ArmV6/Mmu.c
View File

@ -635,12 +635,7 @@ ConvertSectionToPages (
// Get section attributes and convert to page attributes
SectionDescriptor = FirstLevelTable[FirstLevelIdx];
PageDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE;
PageDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_CACHE_POLICY(SectionDescriptor,0);
PageDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AP(SectionDescriptor);
PageDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_XN(SectionDescriptor,0);
PageDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_NG(SectionDescriptor);
PageDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_S(SectionDescriptor);
PageDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE | ConvertSectionAttributesToPageAttributes (SectionDescriptor, FALSE);
// Allocate a page table for the 4KB entries (we use up a full page even though we only need 1KB)
Status = gBS->AllocatePages (AllocateAnyPages, EfiBootServicesData, 1, &PageTableAddr);

6
ArmPkg/Include/Chipset/ArmV7Mmu.h
View File

@ -222,4 +222,10 @@
TT_DESCRIPTOR_PAGE_AP_RW_RW | \
TT_DESCRIPTOR_PAGE_CACHE_POLICY_NON_CACHEABLE)
UINT32
ConvertSectionAttributesToPageAttributes (
IN UINT32 SectionAttributes,
IN BOOLEAN IsLargePage
);
#endif

25
ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
View File

@ -23,6 +23,24 @@
#include "ArmV7Lib.h"
#include "ArmLibPrivate.h"
UINT32
ConvertSectionAttributesToPageAttributes (
IN UINT32 SectionAttributes,
IN BOOLEAN IsLargePage
)
{
UINT32 PageAttributes;
PageAttributes = 0;
PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_CACHE_POLICY (SectionAttributes, IsLargePage);
PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AP (SectionAttributes);
PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_XN (SectionAttributes, IsLargePage);
PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_NG (SectionAttributes);
PageAttributes |= TT_DESCRIPTOR_CONVERT_TO_PAGE_S (SectionAttributes);
return PageAttributes;
}
STATIC
VOID
PopulateLevel2PageTable (
@ -76,12 +94,7 @@ PopulateLevel2PageTable (
TranslationTable = ((UINTN)TranslationTable + TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK) & ~TRANSLATION_TABLE_PAGE_ALIGNMENT_MASK;
// Translate the Section Descriptor into Page Descriptor
SectionDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE;
SectionDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_CACHE_POLICY(*SectionEntry,0);
SectionDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_AP(*SectionEntry);
SectionDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_XN(*SectionEntry,0);
SectionDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_NG(*SectionEntry);
SectionDescriptor |= TT_DESCRIPTOR_CONVERT_TO_PAGE_S(*SectionEntry);
SectionDescriptor = TT_DESCRIPTOR_PAGE_TYPE_PAGE | ConvertSectionAttributesToPageAttributes (*SectionEntry, FALSE);
BaseSectionAddress = TT_DESCRIPTOR_SECTION_BASE_ADDRESS(*SectionEntry);