-#define AMAZON_ICU_EXTINTCR (AMAZON_ICU + 0x0000)
-#define AMAZON_ICU_IRNICR (AMAZON_ICU + 0x0004)
-#define AMAZON_ICU_IRNCR (AMAZON_ICU + 0x0008)
-#define AMAZON_ICU_IRNEN (AMAZON_ICU + 0x000c)
+#define AMAZON_ICU_EXTINTCR ((volatile u32*)(AMAZON_ICU + 0x0000))
+#define AMAZON_ICU_IRNICR ((volatile u32*)(AMAZON_ICU + 0x0004))
+#define AMAZON_ICU_IRNCR ((volatile u32*)(AMAZON_ICU + 0x0008))
+#define AMAZON_ICU_IRNEN ((volatile u32*)(AMAZON_ICU + 0x000c))