1 files changed, 48 insertions, 0 deletions
diff --git a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c
index 23f613f5db..247cf87bf3 100644
--- a/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c
+++ b/ArmPkg/Library/ArmMmuLib/Arm/ArmMmuLibUpdate.c
@@ -523,3 +523,51 @@ ArmClearMemoryRegionReadOnly (
            TT_DESCRIPTOR_SECTION_AP_MASK
            );
 }
+
+/**
+  Convert a region of memory to read-protected, by clearing the access flag.
+
+  @param  BaseAddress           The start of the region.
+  @param  Length                The size of the region.
+
+  @retval EFI_SUCCESS           The attributes were set successfully.
+  @retval EFI_OUT_OF_RESOURCES  The operation failed due to insufficient memory.
+
+**/
+EFI_STATUS
+ArmSetMemoryRegionNoAccess (
+  IN  EFI_PHYSICAL_ADDRESS  BaseAddress,
+  IN  UINT64                Length
+  )
+{
+  return SetMemoryAttributes (
+           BaseAddress,
+           Length,
+           EFI_MEMORY_RP,
+           TT_DESCRIPTOR_SECTION_AF
+           );
+}
+
+/**
+  Convert a region of memory to read-enabled, by setting the access flag.
+
+  @param  BaseAddress           The start of the region.
+  @param  Length                The size of the region.
+
+  @retval EFI_SUCCESS           The attributes were set successfully.
+  @retval EFI_OUT_OF_RESOURCES  The operation failed due to insufficient memory.
+
+**/
+EFI_STATUS
+ArmClearMemoryRegionNoAccess (
+  IN  EFI_PHYSICAL_ADDRESS  BaseAddress,
+  IN  UINT64                Length
+  )
+{
+  return SetMemoryAttributes (
+           BaseAddress,
+           Length,
+           0,
+           TT_DESCRIPTOR_SECTION_AF
+           );
+}