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ArmPkg/CpuDxe: Expose unified region-to-EFI attribute conversion

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In preparation for introducing an implementation of the EFI memory
attributes protocol that is shared between ARM and AArch64, unify the
existing code that converts a page table descriptor into a
EFI_MEMORY_xx bitfield, so it can be called from the generic code.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
This commit is contained in:
Ard Biesheuvel 2023-01-31 23:23:14 +01:00 committed by mergify[bot]
parent ae2c904c3d
commit f4a6f63999
3 changed files with 69 additions and 0 deletions
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17
ArmPkg/Drivers/CpuDxe/AArch64/Mmu.c
View File

@ -83,6 +83,23 @@ PageAttributeToGcdAttribute (
return GcdAttributes; return GcdAttributes;
} }
/**
Convert an arch specific set of page attributes into a mask
of EFI_MEMORY_xx constants.
@param PageAttributes The set of page attributes.
@retval The mask of EFI_MEMORY_xx constants.
**/
UINT64
RegionAttributeToGcdAttribute (
IN UINTN PageAttributes
)
{
return PageAttributeToGcdAttribute (PageAttributes);
}
STATIC STATIC
UINT64 UINT64
GetFirstPageAttribute ( GetFirstPageAttribute (

38
ArmPkg/Drivers/CpuDxe/Arm/Mmu.c
View File

@ -13,6 +13,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include <Library/MemoryAllocationLib.h> #include <Library/MemoryAllocationLib.h>
#include "CpuDxe.h" #include "CpuDxe.h"
/**
Convert a set of ARM short descriptor section attributes into a mask
of EFI_MEMORY_xx constants.
@param SectionAttributes The set of page attributes.
@param GcdAttributes Pointer to the return value.
**/
STATIC
EFI_STATUS EFI_STATUS
SectionToGcdAttributes ( SectionToGcdAttributes (
IN UINT32 SectionAttributes, IN UINT32 SectionAttributes,
@ -74,6 +83,35 @@ SectionToGcdAttributes (
return EFI_SUCCESS; return EFI_SUCCESS;
} }
/**
Convert an arch specific set of page attributes into a mask
of EFI_MEMORY_xx constants.
@param PageAttributes The set of page attributes.
@retval The mask of EFI_MEMORY_xx constants.
**/
UINT64
RegionAttributeToGcdAttribute (
IN UINTN PageAttributes
)
{
UINT64 Result;
SectionToGcdAttributes (PageAttributes, &Result);
return Result;
}
/**
Convert a set of ARM short descriptor page attributes into a mask
of EFI_MEMORY_xx constants.
@param PageAttributes The set of page attributes.
@param GcdAttributes Pointer to the return value.
**/
STATIC
EFI_STATUS EFI_STATUS
PageToGcdAttributes ( PageToGcdAttributes (
IN UINT32 PageAttributes, IN UINT32 PageAttributes,

14
ArmPkg/Drivers/CpuDxe/CpuDxe.h
View File

@ -126,4 +126,18 @@ SetGcdMemorySpaceAttributes (
IN UINT64 Attributes IN UINT64 Attributes
); );
/**
Convert an arch specific set of page attributes into a mask
of EFI_MEMORY_xx constants.
@param PageAttributes The set of page attributes.
@retval The mask of EFI_MEMORY_xx constants.
**/
UINT64
RegionAttributeToGcdAttribute (
IN UINTN PageAttributes
);
#endif // CPU_DXE_H_ #endif // CPU_DXE_H_