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/sparc/lib/interrupts.c

@@ -0,0 +1,68 @@
+/*
+ * (C) Copyright 2000-2002
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * (C) Copyright 2003
+ * Gleb Natapov <gnatapov@mrv.com>
+ *
+ * (C) Copyright 2007
+ * Daniel Hellstrom, Gaisler Research, daniel@gaisler.com.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/irq.h>
+
+/* Implemented by SPARC CPUs */
+extern int interrupt_init_cpu(void);
+extern void timer_interrupt_cpu(void *arg);
+extern int timer_interrupt_init_cpu(void);
+
+int intLock(void)
+{
+	unsigned int pil;
+
+	pil = get_pil();
+
+	/* set PIL to 15 ==> no pending interrupts will interrupt CPU */
+	set_pil(15);
+
+	return pil;
+}
+
+void intUnlock(int oldLevel)
+{
+	set_pil(oldLevel);
+}
+
+void enable_interrupts(void)
+{
+	set_pil(0);		/* enable all interrupts */
+}
+
+int disable_interrupts(void)
+{
+	return intLock();
+}
+
+int interrupt_is_enabled(void)
+{
+	if (get_pil() == 15)
+		return 0;
+	return 1;
+}
+
+int interrupt_init(void)
+{
+	int ret;
+
+	/* call cpu specific function from $(CPU)/interrupts.c */
+	ret = interrupt_init_cpu();
+
+	/* enable global interrupts */
+	enable_interrupts();
+
+	return ret;
+}