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-s5pc1xx/cache.c

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2014 Samsung Electronics
+ * Minkyu Kang <mk7.kang@samsung.com>
+ * Robert Baldyga <r.baldyga@samsung.com>
+ *
+ * based on arch/arm/cpu/armv7/omap3/cache.S
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+void enable_caches(void)
+{
+	dcache_enable();
+}
+
+void disable_caches(void)
+{
+	dcache_disable();
+}
+#endif
+
+#ifndef CONFIG_SYS_L2CACHE_OFF
+void v7_outer_cache_enable(void)
+{
+	__asm(
+		"push    {r0, r1, r2, lr}\n\t"
+		"mrc     15, 0, r3, cr1, cr0, 1\n\t"
+		"orr     r3, r3, #2\n\t"
+		"mcr     15, 0, r3, cr1, cr0, 1\n\t"
+		"pop     {r1, r2, r3, pc}"
+	);
+}
+
+void v7_outer_cache_disable(void)
+{
+	__asm(
+		"push    {r0, r1, r2, lr}\n\t"
+		"mrc     15, 0, r3, cr1, cr0, 1\n\t"
+		"bic     r3, r3, #2\n\t"
+		"mcr     15, 0, r3, cr1, cr0, 1\n\t"
+		"pop     {r1, r2, r3, pc}"
+	);
+}
+#endif