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-zynq/u-boot-spl.lds

@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2014 Xilinx, Inc. Michal Simek
+ * Copyright (c) 2004-2008 Texas Instruments
+ *
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
+		LENGTH = CONFIG_SPL_MAX_SIZE }
+MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
+		LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = ALIGN(4);
+	.text :
+	{
+		__image_copy_start = .;
+		*(.vectors)
+		CPUDIR/start.o (.text*)
+		*(.text*)
+	} > .sram
+
+	. = ALIGN(4);
+	.rodata : {
+		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+	} > .sram
+
+	. = ALIGN(4);
+	.data : {
+		*(.data*)
+	} > .sram
+
+	. = ALIGN(4);
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	} > .sram
+
+	. = ALIGN(4);
+
+	_image_binary_end = .;
+
+	_end = .;
+
+	/* Move BSS section to RAM because of FAT */
+	.bss (NOLOAD) : {
+		__bss_start = .;
+		*(.bss*)
+		 . = ALIGN(4);
+		__bss_end = .;
+	} > .sdram
+
+	/DISCARD/ : { *(.dynsym) }
+	/DISCARD/ : { *(.dynstr*) }
+	/DISCARD/ : { *(.dynamic*) }
+	/DISCARD/ : { *(.plt*) }
+	/DISCARD/ : { *(.interp*) }
+	/DISCARD/ : { *(.gnu*) }
+}