[BOOT] Create input parameters structures.

BOOT/ENVIRON/INC/ntdef.h

@@ -146,4 +146,35 @@ typedef union ULARGE_INTEGER {
 #define FIELD_OFFSET(type, field) ((ULONG)__builtin_offsetof(type, field))
 #endif
 
+//
+// Alignment helpers.
+//
+#define ALIGN_DOWN(x, a) ((x) & ~((a) - 1))
+#define ALIGN_UP(x, a)   ALIGN_DOWN((x) + (a) - 1, a)
+
+//
+// Doubly-linked list entry.
+//
+typedef struct _LIST_ENTRY {
+    struct _LIST_ENTRY *ForwardLink;
+    struct _LIST_ENTRY *BackLink;
+} LIST_ENTRY, *PLIST_ENTRY;
+
+//
+// Runtime library definitions.
+//
+
+PVOID
+RtlCopyMemory (
+    PVOID Destination,
+    CONST PVOID Source,
+    ULONG Length
+    );
+
+PVOID
+RtlZeroMemory (
+    PVOID Destination,
+    ULONG Length
+    );
+
 #endif