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/arc/lib/timer.c

@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arcregs.h>
+
+#define NH_MODE	(1 << 1)	/* Disable timer if CPU is halted */
+
+int timer_init(void)
+{
+	write_aux_reg(ARC_AUX_TIMER0_CTRL, NH_MODE);
+	/* Set max value for counter/timer */
+	write_aux_reg(ARC_AUX_TIMER0_LIMIT, 0xffffffff);
+	/* Set initial count value and restart counter/timer */
+	write_aux_reg(ARC_AUX_TIMER0_CNT, 0);
+	return 0;
+}
+
+unsigned long timer_read_counter(void)
+{
+	return read_aux_reg(ARC_AUX_TIMER0_CNT);
+}