armv8: K3: am654: Introduce FIT generator script

Add a script that is capable of generating a FIT image
source file that combines ATF, SPL(64 bit) and DT.
This combined image is used by R5 SPL and start ATF
on ARMv8 core.

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

tools/k3_fit_atf.sh

@@ -0,0 +1,99 @@
+#!/bin/sh
+# SPDX-License-Identifier: GPL-2.0+
+#
+# script to generate FIT image source for K3 Family boards with
+# ATF, OPTEE, SPL and multiple device trees (given on the command line).
+# Inspired from board/sunxi/mksunxi_fit_atf.sh
+#
+# usage: $0 <dt_name> [<dt_name> [<dt_name] ...]
+
+[ -z "$ATF" ] && ATF="bl31.bin"
+
+if [ ! -f $ATF ]; then
+	echo "WARNING ATF file $ATF NOT found, resulting binary is non-functional" >&2
+	ATF=/dev/null
+fi
+
+[ -z "$TEE" ] && TEE="bl32.bin"
+
+if [ ! -f $TEE ]; then
+	echo "WARNING OPTEE file $TEE NOT found, resulting might be non-functional" >&2
+	TEE=/dev/null
+fi
+
+cat << __HEADER_EOF
+/dts-v1/;
+
+/ {
+	description = "Configuration to load ATF and SPL";
+	#address-cells = <1>;
+
+	images {
+		atf {
+			description = "ARM Trusted Firmware";
+			data = /incbin/("$ATF");
+			type = "firmware";
+			arch = "arm64";
+			compression = "none";
+			os = "arm-trusted-firmware";
+			load = <0x70000000>;
+			entry = <0x70000000>;
+		};
+		tee {
+			description = "OPTEE";
+			data = /incbin/("$TEE");
+			type = "tee";
+			arch = "arm64";
+			compression = "none";
+			os = "tee";
+			load = <0x9e800000>;
+			entry = <0x9e800000>;
+		};
+		spl {
+			description = "SPL (64-bit)";
+			data = /incbin/("spl/u-boot-spl-nodtb.bin");
+			type = "standalone";
+			os = "U-Boot";
+			arch = "arm64";
+			compression = "none";
+			load = <0x80080000>;
+			entry = <0x80080000>;
+		};
+__HEADER_EOF
+
+for dtname in $*
+do
+	cat << __FDT_IMAGE_EOF
+		$(basename $dtname) {
+			description = "$(basename $dtname .dtb)";
+			data = /incbin/("$dtname");
+			type = "flat_dt";
+			arch = "arm";
+			compression = "none";
+		};
+__FDT_IMAGE_EOF
+done
+
+cat << __CONF_HEADER_EOF
+	};
+	configurations {
+		default = "$(basename $1)";
+
+__CONF_HEADER_EOF
+
+for dtname in $*
+do
+	cat << __CONF_SECTION_EOF
+		$(basename $dtname) {
+			description = "$(basename $dtname .dtb)";
+			firmware = "atf";
+			loadables = "tee", "spl";
+			fdt = "$(basename $dtname)";
+		};
+__CONF_SECTION_EOF
+done
+
+cat << __ITS_EOF
+	};
+};
+__ITS_EOF