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/cmd/irq.c

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2008 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+
+static int do_interrupts(cmd_tbl_t *cmdtp, int flag, int argc,
+			 char * const argv[])
+{
+
+	if (argc != 2)
+		return CMD_RET_USAGE;
+
+	/* on */
+	if (strncmp(argv[1], "on", 2) == 0)
+		enable_interrupts();
+	else
+		disable_interrupts();
+
+	return 0;
+}
+
+U_BOOT_CMD(
+	interrupts, 5, 0, do_interrupts,
+	"enable or disable interrupts",
+	"[on, off]"
+);
+
+/* Implemented in $(CPU)/interrupts.c */
+int do_irqinfo (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
+
+U_BOOT_CMD(
+	irqinfo,    1,    1,     do_irqinfo,
+	"print information about IRQs",
+	""
+);