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/tools/fit_common.h

@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2014
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _FIT_COMMON_H_
+#define _FIT_COMMON_H_
+
+#include "imagetool.h"
+#include "mkimage.h"
+#include <image.h>
+
+int fit_verify_header(unsigned char *ptr, int image_size,
+			struct image_tool_params *params);
+
+int fit_check_image_types(uint8_t type);
+
+/**
+ * Map an FDT into memory, optionally increasing its size
+ *
+ * @cmdname:	Tool name (for displaying with error messages)
+ * @fname:	Filename containing FDT
+ * @size_inc:	Amount to increase size by (0 = leave it alone)
+ * @blobp:	Returns pointer to FDT blob
+ * @sbuf:	File status information is stored here
+ * @delete_on_error:	true to delete the file if we get an error
+ * @return 0 if OK, -1 on error.
+ */
+int mmap_fdt(const char *cmdname, const char *fname, size_t size_inc,
+	     void **blobp, struct stat *sbuf, bool delete_on_error);
+
+#endif /* _FIT_COMMON_H_ */