diff --git a/tools/mkimage.h b/tools/mkimage.h
index e07a615..03c6c8f 100644
--- a/tools/mkimage.h
+++ b/tools/mkimage.h
@@ -44,12 +44,24 @@
 
 #define ARRAY_SIZE(x)		(sizeof(x) / sizeof((x)[0]))
 
+static inline void *map_sysmem(ulong paddr, unsigned long len)
+{
+	return (void *)(uintptr_t)paddr;
+}
+
+static inline ulong map_to_sysmem(void *ptr)
+{
+	return (ulong)(uintptr_t)ptr;
+}
+
 #define MKIMAGE_TMPFILE_SUFFIX		".tmp"
 #define MKIMAGE_MAX_TMPFILE_LEN		256
 #define MKIMAGE_DEFAULT_DTC_OPTIONS	"-I dts -O dtb -p 500"
 #define MKIMAGE_MAX_DTC_CMDLINE_LEN	512
 #define MKIMAGE_DTC			"dtc"   /* assume dtc is in $PATH */
 
+#define IH_ARCH_DEFAULT		IH_ARCH_INVALID
+
 /*
  * This structure defines all such variables those are initialized by
  * mkimage main core and need to be referred by image type specific