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/include/configs/km/km-powerpc.h

@@ -0,0 +1,84 @@
+/*
+ * (C) Copyright 2011
+ * Heiko Schocher, DENX Software Engineering, hs@denx.de.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CONFIG_KEYMILE_POWERPC_H
+#define __CONFIG_KEYMILE_POWERPC_H
+
+/* Do boardspecific init for all boards */
+#define CONFIG_BOARD_EARLY_INIT_R
+#define CONFIG_LAST_STAGE_INIT
+
+#define CONFIG_BOOTCOUNT_LIMIT
+
+#define CONFIG_CMD_DTT
+#define CONFIG_JFFS2_CMDLINE
+
+/* standard km ethernet_present for piggy */
+#define CONFIG_KM_COMMON_ETH_INIT
+
+/* EEprom support 24C08, 24C16, 24C64 */
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_ENABLE
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS	3  /* 8 Byte write page */
+#define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS	10
+
+#define CONFIG_ENV_SIZE		0x04000		/* Size of Environment */
+#define CONFIG_FLASH_CFI_MTD
+
+#define CONFIG_SYS_MEMTEST_START 0x00100000	/* memtest works on */
+
+#define CONFIG_SYS_MEMTEST_END	0x00f00000	/* 1 ... 15 MB in DRAM	*/
+
+#define CONFIG_SYS_LOAD_ADDR	0x100000	/* default load address */
+
+/* Reserve 4 MB for malloc */
+#define CONFIG_SYS_MALLOC_LEN		(4 * 1024 * 1024)
+
+/******************************************************************************
+ * (PRAM usage)
+ * ... -------------------------------------------------------
+ * ... |ROOTFSSIZE | PNVRAM |PHRAM |RESERVED_PRAM | END_OF_RAM
+ * ... |<------------------- pram -------------------------->|
+ * ... -------------------------------------------------------
+ * @END_OF_RAM:
+ * @CONFIG_KM_RESERVED_PRAM: reserved pram for special purpose
+ * @CONFIG_KM_PHRAM: address for /var
+ * @CONFIG_KM_PNVRAM: address for PNVRAM (for the application)
+ * @CONFIG_KM_ROOTFSSIZE: address for rootfilesystem in RAM
+ */
+
+/* size of rootfs in RAM */
+#define CONFIG_KM_ROOTFSSIZE	0x0
+/* pseudo-non volatile RAM [hex] */
+#define CONFIG_KM_PNVRAM	0x80000
+/* physical RAM MTD size [hex] */
+#define CONFIG_KM_PHRAM		0x100000
+/* resereved pram area at the end of memroy [hex] */
+#define CONFIG_KM_RESERVED_PRAM	0x0
+/* set the default PRAM value to at least PNVRAM + PHRAM when pram env variable
+ * is not valid yet, which is the case for when u-boot copies itself to RAM */
+#define CONFIG_PRAM		((CONFIG_KM_PNVRAM + CONFIG_KM_PHRAM)>>10)
+
+#define CONFIG_KM_CRAMFS_ADDR	0xC00000
+#define CONFIG_KM_KERNEL_ADDR	0x400000	/* 7680Kbytes */
+#define CONFIG_KM_FDT_ADDR	0xB80000	/* 512Kbytes */
+
+/* architecture specific default bootargs */
+#define CONFIG_KM_DEF_BOOT_ARGS_CPU		""
+
+#define CONFIG_KM_DEF_ENV_CPU						\
+	"u-boot="__stringify(CONFIG_HOSTNAME) "/u-boot.bin\0"		\
+	"update="							\
+		"protect off " __stringify(BOOTFLASH_START) " +${filesize} && "\
+		"erase " __stringify(BOOTFLASH_START) "  +${filesize} && "\
+		"cp.b ${load_addr_r} " __stringify(BOOTFLASH_START)	\
+		"  ${filesize} && "					\
+		"protect on " __stringify(BOOTFLASH_START) "  +${filesize}\0"\
+	"set_fdthigh=true\0"						\
+	"checkfdt=true\0"						\
+	""
+
+#endif /* __CONFIG_KEYMILE_POWERPC_H */