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/x86/include/asm/bootm.h

@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2013, Google Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef ARM_BOOTM_H
+#define ARM_BOOTM_H
+
+void bootm_announce_and_cleanup(void);
+
+/**
+ * boot_linux_kernel() - boot a linux kernel
+ *
+ * This boots a kernel image, either 32-bit or 64-bit. It will also work with
+ * a self-extracting kernel, if you set @image_64bit to false.
+ *
+ * @setup_base:		Pointer to the setup.bin information for the kernel
+ * @load_address:	Pointer to the start of the kernel image
+ * @image_64bit:	true if the image is a raw 64-bit kernel, false if it
+ *			is raw 32-bit or any type of self-extracting kernel
+ *			such as a bzImage.
+ * @return -ve error code. This function does not return if the kernel was
+ * booted successfully.
+ */
+int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit);
+
+#endif