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/arch/sparc/cpu/leon2/cpu.c

@@ -0,0 +1,60 @@
+/* CPU specific code for the LEON2 CPU
+ *
+ * (C) Copyright 2007, 2015
+ * Daniel Hellstrom, Cobham Gaisler, daniel@gaisler.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <watchdog.h>
+#include <command.h>
+#include <netdev.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern void _reset_reloc(void);
+
+int checkcpu(void)
+{
+	/* check LEON version here */
+	printf("CPU: LEON2\n");
+	return 0;
+}
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   LEON2\n");
+	return 0;
+}
+
+#endif
+
+/* ------------------------------------------------------------------------- */
+
+void cpu_reset(void)
+{
+	/* Interrupts off */
+	disable_interrupts();
+
+	/* jump to restart in flash */
+	_reset_reloc();
+}
+
+int do_reset(cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
+{
+	cpu_reset();
+
+	return 1;
+}
+
+/* ------------------------------------------------------------------------- */
+
+#ifdef CONFIG_GRETH
+int cpu_eth_init(bd_t *bis)
+{
+	return greth_initialize(bis);
+}
+#endif