diff options
| -rw-r--r-- | MdePkg/Include/Uefi/UefiBaseType.h | 30 |
1 files changed, 26 insertions, 4 deletions
diff --git a/MdePkg/Include/Uefi/UefiBaseType.h b/MdePkg/Include/Uefi/UefiBaseType.h index c500a0fc1f..5cefc9c188 100644 --- a/MdePkg/Include/Uefi/UefiBaseType.h +++ b/MdePkg/Include/Uefi/UefiBaseType.h @@ -166,16 +166,38 @@ typedef union { //
// The EFI memory allocation functions work in units of EFI_PAGEs that are
-// 4K. This should in no way be confused with the page size of the processor.
+// 4KB. This should in no way be confused with the page size of the processor.
// An EFI_PAGE is just the quanta of memory in EFI.
//
-#define EFI_PAGE_SIZE 0x1000
+#define EFI_PAGE_SIZE SIZE_4KB
#define EFI_PAGE_MASK 0xFFF
#define EFI_PAGE_SHIFT 12
-#define EFI_SIZE_TO_PAGES(a) (((a) >> EFI_PAGE_SHIFT) + (((a) & EFI_PAGE_MASK) ? 1 : 0))
+/**
+ Macro that converts a size, in bytes, to a number of EFI_PAGESs.
-#define EFI_PAGES_TO_SIZE(a) ( (a) << EFI_PAGE_SHIFT)
+ @param Size A size in bytes. This parameter is assumed to be type UINTN.
+ Passing in a parameter that is larger than UINTN may produce
+ unexpected results.
+
+ @return The number of EFI_PAGESs associated with the number of bytes specified
+ by Size.
+
+**/
+#define EFI_SIZE_TO_PAGES(Size) (((Size) >> EFI_PAGE_SHIFT) + (((Size) & EFI_PAGE_MASK) ? 1 : 0))
+
+/**
+ Macro that converts a number of EFI_PAGEs to a size in bytes.
+
+ @param Pages The number of EFI_PAGES. This parameter is assumed to be
+ type UINTN. Passing in a parameter that is larger than
+ UINTN may produce unexpected results.
+
+ @return The number of bytes associated with the number of EFI_PAGEs specified
+ by Pages.
+
+**/
+#define EFI_PAGES_TO_SIZE(Pages) ((Pages) << EFI_PAGE_SHIFT)
///
/// PE32+ Machine type for IA32 UEFI images
|