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/arm/mach-bcm283x/include/mach/timer.h

@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2012,2015 Stephen Warren
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef _BCM2835_TIMER_H
+#define _BCM2835_TIMER_H
+
+#ifndef CONFIG_BCM2835
+#define BCM2835_TIMER_PHYSADDR	0x3f003000
+#else
+#define BCM2835_TIMER_PHYSADDR	0x20003000
+#endif
+
+#define BCM2835_TIMER_CS_M3	(1 << 3)
+#define BCM2835_TIMER_CS_M2	(1 << 2)
+#define BCM2835_TIMER_CS_M1	(1 << 1)
+#define BCM2835_TIMER_CS_M0	(1 << 0)
+
+#ifndef __ASSEMBLY__
+#include <linux/types.h>
+
+struct bcm2835_timer_regs {
+	u32 cs;
+	u32 clo;
+	u32 chi;
+	u32 c0;
+	u32 c1;
+	u32 c2;
+	u32 c3;
+};
+
+extern ulong get_timer_us(ulong base);
+
+#endif
+
+#endif