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/blackfin/cpu/u-boot.lds

@@ -0,0 +1,142 @@
+/*
+ * U-Boot - u-boot.lds.S
+ *
+ * Copyright (c) 2005-2010 Analog Device Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <asm/blackfin.h>
+#undef ALIGN
+#undef ENTRY
+
+#ifndef LDS_BOARD_TEXT
+# define LDS_BOARD_TEXT
+#endif
+
+/* If we don't actually load anything into L1 data, this will avoid
+ * a syntax error.  If we do actually load something into L1 data,
+ * we'll get a linker memory load error (which is what we'd want).
+ * This is here in the first place so we can quickly test building
+ * for different CPU's which may lack non-cache L1 data.
+ */
+#ifndef L1_DATA_A_SRAM
+# define L1_DATA_A_SRAM      0
+# define L1_DATA_A_SRAM_SIZE 0
+#endif
+#ifndef L1_DATA_B_SRAM
+# define L1_DATA_B_SRAM      L1_DATA_A_SRAM
+# define L1_DATA_B_SRAM_SIZE L1_DATA_A_SRAM_SIZE
+#endif
+
+/* The 0xC offset is so we don't clobber the tiny LDR jump block. */
+#ifdef CONFIG_BFIN_BOOTROM_USES_EVT1
+# define L1_CODE_ORIGIN L1_INST_SRAM
+#else
+# define L1_CODE_ORIGIN L1_INST_SRAM + 0xC
+#endif
+
+OUTPUT_ARCH(bfin)
+
+MEMORY
+{
+#if CONFIG_MEM_SIZE
+	ram     : ORIGIN = CONFIG_SYS_MONITOR_BASE, LENGTH = CONFIG_SYS_MONITOR_LEN
+# define ram_code ram
+# define ram_data ram
+#else
+# define ram_code l1_code
+# define ram_data l1_data
+#endif
+	l1_code : ORIGIN = L1_CODE_ORIGIN,          LENGTH = L1_INST_SRAM_SIZE
+	l1_data : ORIGIN = L1_DATA_B_SRAM,          LENGTH = L1_DATA_B_SRAM_SIZE
+}
+
+ENTRY(_start)
+SECTIONS
+{
+	.text.pre :
+	{
+		arch/blackfin/cpu/start.o (.text .text.*)
+
+		LDS_BOARD_TEXT
+	} >ram_code
+
+	.text.init :
+	{
+		arch/blackfin/cpu/initcode.o (.text .text.*)
+	} >ram_code
+	__initcode_lma = LOADADDR(.text.init);
+	__initcode_len = SIZEOF(.text.init);
+
+	.text :
+	{
+		*(.text .text.*)
+	} >ram_code
+
+	.rodata :
+	{
+		. = ALIGN(4);
+		*(SORT_BY_ALIGNMENT(SORT_BY_NAME(.rodata*)))
+		. = ALIGN(4);
+	} >ram_data
+
+	.data :
+	{
+		. = ALIGN(4);
+		*(.data .data.*)
+		*(.data1)
+		*(.sdata)
+		*(.sdata2)
+		*(.dynamic)
+		CONSTRUCTORS
+	} >ram_data
+
+
+	.u_boot_list : {
+		KEEP(*(SORT(.u_boot_list*)));
+	} >ram_data
+
+	.text_l1 :
+	{
+		. = ALIGN(4);
+		__stext_l1 = .;
+		*(.l1.text)
+		. = ALIGN(4);
+		__etext_l1 = .;
+	} >l1_code AT>ram_code
+	__text_l1_lma = LOADADDR(.text_l1);
+	__text_l1_len = SIZEOF(.text_l1);
+	ASSERT (__text_l1_len <= L1_INST_SRAM_SIZE, "L1 text overflow!")
+
+	.data_l1 :
+	{
+		. = ALIGN(4);
+		__sdata_l1 = .;
+		*(.l1.data)
+		*(.l1.bss)
+		. = ALIGN(4);
+		__edata_l1 = .;
+	} >l1_data AT>ram_data
+	__data_l1_lma = LOADADDR(.data_l1);
+	__data_l1_len = SIZEOF(.data_l1);
+	ASSERT (__data_l1_len <= L1_DATA_B_SRAM_SIZE, "L1 data overflow!")
+
+	.bss :
+	{
+		. = ALIGN(4);
+		*(.sbss) *(.scommon)
+		*(.dynbss)
+		*(.bss .bss.*)
+		*(COMMON)
+		. = ALIGN(4);
+	} >ram_data
+	__bss_end = .;
+	__bss_start = ADDR(.bss);
+	__bss_len = SIZEOF(.bss);
+	__init_end = .;
+}