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/board/gaisler/gr_xc3s_1500/Kconfig

@@ -0,0 +1,9 @@
+if TARGET_GR_XC3S_1500
+
+config SYS_BOARD
+	default "gr_xc3s_1500"
+
+config SYS_CONFIG_NAME
+	default "gr_xc3s_1500"
+
+endif

u-boot/board/gaisler/gr_xc3s_1500/MAINTAINERS

@@ -0,0 +1,6 @@
+GR_XC3S_1500 BOARD
+#M:	-
+S:	Maintained
+F:	board/gaisler/gr_xc3s_1500/
+F:	include/configs/gr_xc3s_1500.h
+F:	configs/gr_xc3s_1500_defconfig

u-boot/board/gaisler/gr_xc3s_1500/Makefile

@@ -0,0 +1,8 @@
+#
+# (C) Copyright 2003-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= gr_xc3s_1500.o

u-boot/board/gaisler/gr_xc3s_1500/gr_xc3s_1500.c

@@ -0,0 +1,26 @@
+/*
+ * (C) Copyright 2007
+ * Daniel Hellstrom, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/leon.h>
+
+phys_size_t initdram(int board_type)
+{
+	return 1;
+}
+
+int checkboard(void)
+{
+	puts("Board: GR-XC3S-1500\n");
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	return 0;
+}