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/cobra5272/cobra5272.c

@@ -0,0 +1,38 @@
+/*
+ * (C) Copyright 2000-2003
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/immap.h>
+
+
+int checkboard (void)
+{
+	puts ("Board: ");
+	puts ("senTec COBRA5272 Board\n");
+	return 0;
+};
+
+phys_size_t initdram (int board_type)
+{
+	volatile sdramctrl_t *sdp = (sdramctrl_t *) (MMAP_SDRAM);
+
+	sdp->sdram_sdtr = 0xf539;
+	sdp->sdram_sdcr = 0x4211;
+
+	/* Dummy write to start SDRAM */
+	*((volatile unsigned long *) 0) = 0;
+
+	return CONFIG_SYS_SDRAM_SIZE * 1024 * 1024;
+};
+
+int testdram (void)
+{
+	/* TODO: XXX XXX XXX */
+	printf ("DRAM test not implemented!\n");
+
+	return (0);
+}