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/microblaze/include/asm/microblaze_intc.h

@@ -0,0 +1,36 @@
+/*
+ * (C) Copyright 2007 Michal Simek
+ *
+ * Michal  SIMEK <monstr@monstr.cz>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+typedef volatile struct microblaze_intc_t {
+	int isr; /* interrupt status register */
+	int ipr; /* interrupt pending register */
+	int ier; /* interrupt enable register */
+	int iar; /* interrupt acknowledge register */
+	int sie; /* set interrupt enable bits */
+	int cie; /* clear interrupt enable bits */
+	int ivr; /* interrupt vector register */
+	int mer; /* master enable register */
+} microblaze_intc_t;
+
+struct irq_action {
+	interrupt_handler_t *handler; /* pointer to interrupt rutine */
+	void *arg;
+	int count; /* number of interrupt */
+};
+
+/**
+ * Register and unregister interrupt handler rutines
+ *
+ * @param irq	IRQ number
+ * @param hdlr	Interrupt handler rutine
+ * @param arg	Pointer to argument which is passed to int. handler rutine
+ * @return	0 if registration pass, 1 if unregistration pass,
+ *		or an error code < 0 otherwise
+ */
+int install_interrupt_handler(int irq, interrupt_handler_t *hdlr,
+				       void *arg);