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/cpu/u-boot.lds

@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2000
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ * (C) Copyright 2015
+ * Angelo Dureghello, Sysam Firmware, angelo@sysam.it
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#include <config.h>
+
+OUTPUT_ARCH(m68k)
+
+#ifndef LDS_BOARD_TEXT
+#define LDS_BOARD_TEXT
+#endif
+
+SECTIONS
+{
+	.text :
+	{
+		CPUDIR/start.o (.text*)
+		LDS_BOARD_TEXT
+
+		*(.text*)
+	}
+	_etext = .;
+	PROVIDE (etext = .);
+	.rodata :
+	{
+		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+	}
+
+	/* Read-write section, merged into data segment: */
+	. = (. + 0x00FF) & 0xFFFFFF00;
+	_erotext = .;
+	PROVIDE (erotext = .);
+
+	.reloc :
+	{
+		__got_start = .;
+		KEEP(*(.got))
+		__got_end = .;
+		_GOT2_TABLE_ = .;
+		KEEP(*(.got2))
+		_FIXUP_TABLE_ = .;
+		KEEP(*(.fixup))
+	}
+	__got2_entries = (_FIXUP_TABLE_ - _GOT2_TABLE_) >>2;
+	__fixup_entries = (. - _FIXUP_TABLE_)>>2;
+
+	.data :
+	{
+		*(.data*)
+		*(.sdata*)
+	}
+	_edata = .;
+	PROVIDE (edata = .);
+
+	. = .;
+
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	}
+
+	. = .;
+	__start___ex_table = .;
+	__ex_table : { *(__ex_table) }
+	__stop___ex_table = .;
+
+	. = ALIGN(256);
+	__init_begin = .;
+	.text.init : { *(.text.init) }
+	.data.init : { *(.data.init) }
+	. = ALIGN(256);
+	__init_end = .;
+
+	__bss_start = .;
+	.bss (NOLOAD)       :
+	{
+		_sbss = .;
+		*(.bss*)
+		*(.sbss*)
+		*(COMMON)
+		. = ALIGN(4);
+		_ebss = .;
+	}
+	__bss_end = . ;
+	PROVIDE (end = .);
+}