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/board/freescale/common/ns_access.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <fsl_csu.h>
+#include <asm/arch/ns_access.h>
+
+static void enable_devices_ns_access(struct csu_ns_dev *ns_dev, uint32_t num)
+{
+	u32 *base = (u32 *)CONFIG_SYS_FSL_CSU_ADDR;
+	u32 *reg;
+	uint32_t val;
+	int i;
+
+	for (i = 0; i < num; i++) {
+		reg = base + ns_dev[i].ind / 2;
+		val = in_be32(reg);
+		if (ns_dev[i].ind % 2 == 0) {
+			val &= 0x0000ffff;
+			val |= ns_dev[i].val << 16;
+		} else {
+			val &= 0xffff0000;
+			val |= ns_dev[i].val;
+		}
+		out_be32(reg, val);
+	}
+}
+
+void enable_layerscape_ns_access(void)
+{
+	enable_devices_ns_access(ns_dev, ARRAY_SIZE(ns_dev));
+}