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/include/asm/arch-tegra30/flow.h

@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2010-2012, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#ifndef _TEGRA30_FLOW_H_
+#define _TEGRA30_FLOW_H_
+
+struct flow_ctlr {
+	u32 halt_cpu_events;
+	u32 halt_cop_events;
+	u32 cpu_csr;
+	u32 cop_csr;
+	u32 xrq_events;
+	u32 halt_cpu1_events;
+	u32 cpu1_csr;
+	u32 halt_cpu2_events;
+	u32 cpu2_csr;
+	u32 halt_cpu3_events;
+	u32 cpu3_csr;
+	u32 cluster_control;
+};
+
+#endif	/* _TEGRA30_FLOW_H_ */