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

3 files changed, 26 insertions, 12 deletions

diff --git a/ArmPkg/Drivers/CpuDxe/ArmV6/Mmu.c b/ArmPkg/Drivers/CpuDxe/ArmV6/Mmu.c
index ce8bd65..38b709d 100644
--- a/ArmPkg/Drivers/CpuDxe/ArmV6/Mmu.c
+++ b/ArmPkg/Drivers/CpuDxe/ArmV6/Mmu.c
@@ -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);

diff --git a/ArmPkg/Include/Chipset/ArmV7Mmu.h b/ArmPkg/Include/Chipset/ArmV7Mmu.h
index 2ddab76..a3b3e35 100644
--- a/ArmPkg/Include/Chipset/ArmV7Mmu.h
+++ b/ArmPkg/Include/Chipset/ArmV7Mmu.h
@@ -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

diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
index 0f8b814..d64c188 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
@@ -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);