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/reset.c

@@ -0,0 +1,28 @@
+/*
+ * (C) Copyright 2012 Stephen Warren
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/arch/wdog.h>
+
+#define RESET_TIMEOUT 10
+
+void reset_cpu(ulong addr)
+{
+	struct bcm2835_wdog_regs *regs =
+		(struct bcm2835_wdog_regs *)BCM2835_WDOG_PHYSADDR;
+	uint32_t rstc;
+
+	rstc = readl(&regs->rstc);
+	rstc &= ~BCM2835_WDOG_RSTC_WRCFG_MASK;
+	rstc |= BCM2835_WDOG_RSTC_WRCFG_FULL_RESET;
+
+	writel(BCM2835_WDOG_PASSWORD | RESET_TIMEOUT, &regs->wdog);
+	writel(BCM2835_WDOG_PASSWORD | rstc, &regs->rstc);
+}