Index: kernel/arch/arm32/src/mm/km.c
===================================================================
--- kernel/arch/arm32/src/mm/km.c	(revision 77a493aeaf33d7336bb9ff48c3b24021eeaa2bc5)
+++ kernel/arch/arm32/src/mm/km.c	(revision 90924df6f05e59a15f5187cb8b525c6bb8351392)
@@ -34,4 +34,6 @@
 #include <mm/km.h>
 #include <config.h>
+#include <typedefs.h>
+#include <macros.h>
 
 void km_identity_arch_init(void)
@@ -47,4 +49,10 @@
 }
 
+bool km_is_non_identity_arch(uintptr_t addr)
+{
+	return iswithin(KM_ARM32_NON_IDENTITY_START,
+	    KM_ARM32_NON_IDENTITY_SIZE, addr, 1);
+}
+
 /** @}
  */