@@ -1,4 +1,4 @@
-/* $NetBSD: awin_sysconfig.c,v 1.2 2015/10/25 20:46:46 bouyer Exp $ */
+/* $NetBSD: awin_sysconfig.c,v 1.3 2017/03/08 17:06:35 jakllsch Exp $ */
 
 /*-
  * Copyright (c) 2014 Jared D. McNeill <jmcneill@invisible.ca>
@@ -29,7 +29,7 @@
 #include "opt_allwinner.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: awin_sysconfig.c,v 1.2 2015/10/25 20:46:46 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: awin_sysconfig.c,v 1.3 2017/03/08 17:06:35 jakllsch Exp $");
 
 #include <sys/param.h>
 #include <sys/bus.h>
@@ -90,6 +90,8 @@
 bool
 awin_sysconfig_init(void)
 {
+	struct awin_sysconfig_head head;
+
 	if (get_bootconf_option(boot_args, "sysconfig",
 	    BOOTOPT_TYPE_HEXINT, &awin_sysconfig_base) == 0) {
 		return false;
@@ -101,6 +103,13 @@
 	const uint8_t * const sysconfig = (const uint8_t *)
 	    (awin_sysconfig_base + KERNEL_BASE_VOFFSET);
 	memcpy(awin_sysconfig, sysconfig, AWIN_SYSCONFIG_SIZE);
+
+	memcpy(&head, &awin_sysconfig[0], sizeof(head));
+	if (head.count >= 0x01000000) {
+		printf("%s(): 0x%x entries in sysconfig, ignoring.\n",
+		    __func__, head.count);
+		return false;
+	}
 
 	return true;
 }