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/xilinx/zynqmp/xil_io.h

@@ -0,0 +1,35 @@
+/*
+ * SPDX-License-Identifier:    GPL-2.0+
+ */
+
+#ifndef XIL_IO_H /* prevent circular inclusions */
+#define XIL_IO_H
+
+/* FIXME remove this when vivado is fixed */
+#include <asm/io.h>
+
+#define xil_printf(...)
+
+void Xil_ICacheEnable(void)
+{}
+
+void Xil_DCacheEnable(void)
+{}
+
+void Xil_ICacheDisable(void)
+{}
+
+void Xil_DCacheDisable(void)
+{}
+
+void Xil_Out32(unsigned long addr, unsigned long val)
+{
+	writel(val, addr);
+}
+
+int Xil_In32(unsigned long addr)
+{
+	return readl(addr);
+}
+
+#endif /* XIL_IO_H */