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/m68k/include/asm/global_data.h

@@ -0,0 +1,33 @@
+/*
+ * (C) Copyright 2002 - 2010
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef	__ASM_GBL_DATA_H
+#define __ASM_GBL_DATA_H
+
+/* Architecture-specific global data */
+struct arch_global_data {
+#ifdef CONFIG_SYS_I2C_FSL
+	unsigned long	i2c1_clk;
+	unsigned long	i2c2_clk;
+#endif
+#ifdef CONFIG_EXTRA_CLOCK
+	unsigned long inp_clk;
+	unsigned long vco_clk;
+	unsigned long flb_clk;
+#endif
+};
+
+#include <asm-generic/global_data.h>
+
+#if 0
+extern gd_t *global_data;
+#define DECLARE_GLOBAL_DATA_PTR     gd_t *gd = global_data
+#else
+#define DECLARE_GLOBAL_DATA_PTR     register volatile gd_t *gd asm ("d7")
+#endif
+
+#endif /* __ASM_GBL_DATA_H */