efi_loader: use an enum for the memory allocation types

For type checking we need an enum.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>

diff --git a/include/efi.h b/include/efi.h
index 6417a9b..4eb573a 100644 (file)
--- a/include/efi.h
+++ b/include/efi.h
@@ -125,6 +125,34 @@ struct efi_table_hdr {
        u32 reserved;
 };
 
+/* Allocation types for calls to boottime->allocate_pages*/
+/**
+ * enum efi_allocate_type - address restriction for memory allocation
+ */
+enum efi_allocate_type {
+       /**
+        * @EFI_ALLOCATE_ANY_PAGES:
+        * Allocate any block of sufficient size. Ignore memory address.
+        */
+       EFI_ALLOCATE_ANY_PAGES,
+       /**
+        * @EFI_ALLOCATE_MAX_ADDRESS:
+        * Allocate a memory block with an uppermost address less or equal
+        * to the indicated address.
+        */
+       EFI_ALLOCATE_MAX_ADDRESS,
+       /**
+        * @EFI_ALLOCATE_ADDRESS:
+        * Allocate a memory block starting at the indicatged adress.
+        */
+       EFI_ALLOCATE_ADDRESS,
+       /**
+        * @EFI_MAX_ALLOCATE_TYPE:
+        * Value use for range checking.
+        */
+       EFI_MAX_ALLOCATE_TYPE,
+};
+
 /* Enumeration of memory types introduced in UEFI */
 enum efi_mem_type {
        EFI_RESERVED_MEMORY_TYPE,
@@ -224,12 +252,6 @@ struct efi_mem_desc {
 
 #define EFI_MEMORY_DESCRIPTOR_VERSION 1
 
-/* Allocation types for calls to boottime->allocate_pages*/
-#define EFI_ALLOCATE_ANY_PAGES         0
-#define EFI_ALLOCATE_MAX_ADDRESS       1
-#define EFI_ALLOCATE_ADDRESS           2
-#define EFI_MAX_ALLOCATE_TYPE          3
-
 /* Types and defines for Time Services */
 #define EFI_TIME_ADJUST_DAYLIGHT 0x1
 #define EFI_TIME_IN_DAYLIGHT     0x2