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/cpu/armv7/kona-common/reset.S

@@ -0,0 +1,26 @@
+/*
+ * Copyright 2013 Broadcom Corporation.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+.globl reset_cpu
+reset_cpu:
+	ldr	r1, =0x35001f00
+	ldr	r2, [r1]
+	ldr	r4, =0x80000000
+	and	r4, r2, r4
+	ldr	r3, =0xA5A500
+	orr	r4, r4, r3
+	orr	r4, r4, #0x1
+
+	str	r4, [r1]
+
+	ldr	r1, =0x35001f04
+	ldr	r2, [r1]
+	ldr	r4, =0x80000000
+	and	r4, r2, r4
+	str	r4, [r1]
+
+_loop_forever:
+	b	_loop_forever