Index: sys/arch/sparc/sparc/openfirm.c
===================================================================
RCS file: /cvsroot/src/sys/arch/sparc/sparc/openfirm.c,v
retrieving revision 1.20
diff -u -r1.20 openfirm.c
--- sys/arch/sparc/sparc/openfirm.c	27 Mar 2015 06:10:25 -0000	1.20
+++ sys/arch/sparc/sparc/openfirm.c	26 Mar 2016 20:01:45 -0000
@@ -512,6 +512,13 @@
 	if (len > 1024) {
 		panic("OF_write(len = %d)\n", len);
 	}
+#if 1
+	static unsigned char tmp_addr[1024];
+	if (addr > (void*)0xffffffffUL) {
+	  memcpy(&tmp_addr[0], addr, len);
+	  addr = tmp_addr;
+	}
+#endif	
 	args.name = ADR2CELL("write");
 	args.nargs = 3;
 	args.nreturns = 1;