avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/net/rarp.h

@@ -0,0 +1,29 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#if defined(CONFIG_CMD_RARP)
+
+#ifndef __RARP_H__
+#define __RARP_H__
+
+#include <net.h>
+
+/**********************************************************************/
+/*
+ *	Global functions and variables.
+ */
+
+extern int rarp_try;
+
+/* Process the receipt of a RARP packet */
+void rarp_receive(struct ip_udp_hdr *ip, unsigned len);
+void rarp_request(void);	/* Send a RARP request */
+
+/**********************************************************************/
+
+#endif /* __RARP_H__ */
+#endif