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/dnp5370/Kconfig

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+if TARGET_DNP5370
+
+config SYS_BOARD
+	default "dnp5370"
+
+config SYS_CONFIG_NAME
+	default "dnp5370"
+
+endif

u-boot/board/dnp5370/MAINTAINERS

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+DNP5370 BOARD
+M:	M.Hasewinkel (MHA) <info@ssv-embedded.de>
+S:	Maintained
+F:	board/dnp5370/
+F:	include/configs/dnp5370.h
+F:	configs/dnp5370_defconfig

u-boot/board/dnp5370/Makefile

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+#
+# U-Boot - Makefile
+#
+# Copyright (c) 2005-2007 Analog Device Inc.
+#
+# (C) Copyright 2000-2006
+# Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y	:= dnp5370.o

u-boot/board/dnp5370/README

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+This document describes the board support for
+Dil/NetPC DNP/5370 (http://www.dilnetpc.com/dnp0086.htm) module.
+The distributor is SSV (http://www.ssv-embedded.de),
+
+The module used to develop the support files contains:
+
+*   Processor: Blackfin BF537 Rev 0.3 (600 MHz core / 120MHz RAM)
+
+*   RAM: 32 MB SDRAM
+    Hynix HY57V561620FTP-H 810EA
+    Connected to Blackfin via "Expansion Bus"
+    Address range 0x0000.0000 - 0x1fff.ffff
+
+*   NOR flash: 32 MBit (4 MByte)
+    Exel Semiconductor ES29LVS320EB
+    Connected to Blackfin via "Expansion Bus",
+    Chip Selects 0, 1 and 2, each is connected
+    to a 1 MB memory bank at Blackfin, therefore
+    only 3 MB accessible.
+    Address range 0x2000.0000 - 0x202f.ffff
+    CFI compatible
+
+    Exel Semiconductor was bought by Rohm Semiconductor (www.rohm.com).
+
+*   NAND flash: 64 MBit (8 MByte)
+    Atmel 45DB642D-CNU
+    Connected to Blackfin via SPI
+    CFI compatible
+
+*   Davicom DM9161EP Ethernet PHY
+
+*   A SD card reader, connected via SPI
+
+*   Hardware watchdog MAX823 or TPS3823
+
+(other devices not listed here)
+
+To run it, the module must be inserted in a 64 pin DIL socket
+on another board, e.g. DNP/EVA13 (together: SSV SK28).
+
+The Blackfin is booted from NOR flash. The NOR flash data begins
+with the U-Boot code and is then followed by the Linux code.
+Finally, the MAC is stored in the last sector.
+You may need to adjust these settings to your needs.
+The memory map used to develop the board support is:
+
+Memory map:
+0x00000000 .. 0x01ffffff SDRAM
+0x20000000 .. 0x202fffff NOR flash
+
+RAM use:
+0x01f9bffc .. 0x01fbbffb U-Boot stack
+0x01f9c000 .. 0x01f9ffff U-Boot global data
+0x01fa0000 .. 0x01fbffff U-Boot malloc() RAM
+0x01fc0000 .. 0x01ffffff U-Boot execution RAM
+
+NOR flash use:
+0x20000000 .. 0x0002ffff U-Boot
+0x20004000 .. 0x20005fff U-Boot environment
+0x20030000 .. 0x202effff Linux kernel image
+0x202f0000 .. 0x202fffff MAC address sector
+
+NOR flash is 0x00300000 (3145728) bytes large (3 MB).
+Max space for compressed kernel in flash is 0x002c0000 (2883584) bytes (2.75 MB)
+Max space for u-boot in flash is 0x00030000 (196608) bytes (192 KB)
+
+The module is hardwired to BYPASS boot mode.

u-boot/board/dnp5370/dnp5370.c

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+/*
+ * U-Boot - main board file
+ *
+ * (C) Copyright 2010 3ality Digital Systems
+ *
+ * Copyright (c) 2005-2008 Analog Devices Inc.
+ *
+ * (C) Copyright 2000-2004
+ * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <config.h>
+#include <asm/blackfin.h>
+#include <net.h>
+#include <netdev.h>
+#include <asm/gpio.h>
+
+static void disable_external_watchdog(void)
+{
+#ifdef CONFIG_DNP5370_EXT_WD_DISABLE
+	/* disable external HW watchdog with PH13 = WD1 = 1 */
+	gpio_request(GPIO_PH13, "ext_wd");
+	gpio_direction_output(GPIO_PH13, 1);
+#endif
+}
+
+int checkboard(void)
+{
+	printf("Board: SSV DilNet DNP5370\n");
+	return 0;
+}
+
+#ifdef CONFIG_BFIN_MAC
+static void board_init_enetaddr(uchar *mac_addr)
+{
+#ifndef CONFIG_SYS_NO_FLASH
+	/* we cram the MAC in the last flash sector */
+	uchar *board_mac_addr = (uchar *)0x202F0000;
+	if (is_valid_ethaddr(board_mac_addr)) {
+		memcpy(mac_addr, board_mac_addr, 6);
+		eth_setenv_enetaddr("ethaddr", mac_addr);
+	}
+#endif
+}
+
+int board_eth_init(bd_t *bis)
+{
+	return bfin_EMAC_initialize(bis);
+}
+#endif
+
+/* miscellaneous platform dependent initialisations */
+int misc_init_r(void)
+{
+	disable_external_watchdog();
+
+#ifdef CONFIG_BFIN_MAC
+	uchar enetaddr[6];
+	if (!eth_getenv_enetaddr("ethaddr", enetaddr))
+		board_init_enetaddr(enetaddr);
+#endif
+
+#ifndef CONFIG_SYS_NO_FLASH
+	/* we use the last sector for the MAC address / POST LDR */
+	extern flash_info_t flash_info[];
+	flash_protect(FLAG_PROTECT_SET, 0x202F0000, 0x202FFFFF, &flash_info[0]);
+#endif
+
+	return 0;
+}