armv8: K3: am654: Add support for generating build targets

Update Makefile to generate
- tispl.bin: First stage bootloader on ARMv8 core
- u-boot.img: Second stage bootloader on ARMv8 core.

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

arch/arm/mach-k3/config.mk

@@ -0,0 +1,19 @@
+# SPDX-License-Identifier:	GPL-2.0+
+#
+# Copyright (C) 2017-2018 Texas Instruments Incorporated - http://www.ti.com/
+#	Lokesh Vutla <lokeshvutla@ti.com>
+
+ifdef CONFIG_SPL_BUILD
+
+ifdef CONFIG_ARM64
+SPL_ITS := u-boot-spl-k3.its
+$(SPL_ITS): FORCE
+	$(srctree)/tools/k3_fit_atf.sh \
+	$(patsubst %,$(obj)/dts/%.dtb,$(subst ",,$(CONFIG_SPL_OF_LIST))) > $@
+
+ALL-y	+= tispl.bin
+endif
+
+else
+ALL-y	+= u-boot.img
+endif

scripts/Makefile.spl

@@ -144,6 +144,10 @@ quiet_cmd_mkimage = MKIMAGE $@
 cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
 	>$(MKIMAGEOUTPUT) $(if $(KBUILD_VERBOSE:0=), && cat $(MKIMAGEOUTPUT))
 
+quiet_cmd_mkfitimage = MKIMAGE $@
+cmd_mkfitimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -f $(SPL_ITS) -E $@ \
+	$(if $(KBUILD_VERBOSE:1=), MKIMAGEOUTPUT)
+
 MKIMAGEFLAGS_MLO = -T omapimage -a $(CONFIG_SPL_TEXT_BASE)
 
 MKIMAGEFLAGS_MLO.byteswap = -T omapimage -n byteswap -a $(CONFIG_SPL_TEXT_BASE)
@@ -407,3 +411,8 @@ $(obj)/$(SPL_BIN).multidtb.fit.gz: $(obj)/$(SPL_BIN).multidtb.fit
 
 $(obj)/$(SPL_BIN).multidtb.fit.lzo: $(obj)/$(SPL_BIN).multidtb.fit
 	@lzop -f9 $< > $@
+
+ifdef CONFIG_ARCH_K3
+tispl.bin: $(obj)/u-boot-spl-nodtb.bin $(SHRUNK_ARCH_DTB) $(SPL_ITS) FORCE
+	$(call if_changed,mkfitimage)
+endif