- * we use the 0x00000000~0xfeffffff space since 0xff000000~0xffffffff
- * is SoC register space (i.e. reserved)
+ * we use the 0x00000000~0xfdffffff space since 0xff000000~0xffffffff
+ * is SoC register space (i.e. reserved), and 0xfe000000~0xfeffffff is
+ * inaccessible for some IP controller.