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/powerpc/cpu/mpc512x/interrupts.c

@@ -0,0 +1,45 @@
+/*
+ * (C) Copyright 2000-2007
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * Copyright 2004 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Derived from the MPC83xx code.
+ */
+
+#include <common.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+struct irq_action {
+	interrupt_handler_t *handler;
+	void *arg;
+	ulong count;
+};
+
+int interrupt_init_cpu (unsigned *decrementer_count)
+{
+	*decrementer_count = get_tbclk () / CONFIG_SYS_HZ;
+
+	return 0;
+}
+
+/*
+ * Install and free an interrupt handler.
+ */
+void
+irq_install_handler (int irq, interrupt_handler_t * handler, void *arg)
+{
+}
+
+void irq_free_handler (int irq)
+{
+}
+
+void timer_interrupt_cpu (struct pt_regs *regs)
+{
+	/* nothing to do here */
+	return;
+}