1 files changed, 12 insertions, 9 deletions
diff --git a/cp_regs.h b/cp_regs.h
index 98a8bb8..e5e7063 100644
--- a/cp_regs.h
+++ b/cp_regs.h
@@ -1,5 +1,7 @@
-#include <stdint.h>
+#ifndef CP_REGS_H
+#define CP_REGS_H
 
+#include <stdint.h>
 
 // SCTLR - System Control Register
 
@@ -98,14 +100,15 @@ typedef union
 
     // i'm not sure 'interprocess region bits' is the right name,
     // I'm just guessing (by analogy to RGN -> region bits)
-#define CACHEABLE_BIT                  C
-#define INTERPROCESS_REGION_BITS_1     IRGN_1
-#define SHAREABLE_BIT                  S
-#define IMPLEMENTATION_DEFINED_BIT     IMP
-#define REGION_BITS_1_0                RGN
-#define INTERPROCESS_REGION_BITS_0     IRGN_0
-#define NON_OUTER_SHAREABLE_BIT        NOS
-#define TRANSLATION_TABLE_BASE_ADDRESS Bits_31_14
+#define TTBR_CACHEABLE_BIT                  C
+#define TTBR_INTERPROCESS_REGION_BITS_1     IRGN_1
+#define TTBR_SHAREABLE_BIT                  S
+#define TTBR_IMPLEMENTATION_DEFINED_BIT     IMP
+#define TTBR_REGION_BITS_1_0                RGN
+#define TTBR_INTERPROCESS_REGION_BITS_0     IRGN_0
+#define TTBR_NON_OUTER_SHAREABLE_BIT        NOS
+#define TTBR_TRANSLATION_TABLE_BASE_ADDRESS Bits_31_14
   } fields;
 } TTBR_t;
 
+#endif // CP_REGS_H