Some platforms require more complex U-Boot images than we can easily
generate via the mkimage command line, for instance to load additional
image files.
Introduce a CONFIG_SPL_FIT_SOURCE and CONFIG_SPL_FIT_GENERATOR symbol,
which can either hold an .its source file describing the image layout,
or, in the second case, a generator tool (script) to create such
a source file. This script gets passed the list of device tree files
from the CONFIG_OF_LIST variable.
A platform or board can define either of those in their defconfig file
to allow an easy building of such an image.
Signed-off-by: Andre Przywara <andre.przyw...@arm.com>
---
Kconfig | 17 +++++++++++++++++
Makefile | 20 ++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/Kconfig b/Kconfig
index 81b4226..f3e4243 100644
--- a/Kconfig
+++ b/Kconfig
@@ -238,6 +238,23 @@ config SPL_FIT_IMAGE_POST_PROCESS
injected into the FIT creation (i.e. the blobs would have been pre-
processed before being added to the FIT image).
+config SPL_FIT_SOURCE
+ string ".its source file for U-Boot FIT image"
+ depends on SPL_FIT
+ help
+ Specifies a (platform specific) FIT source file to generate the
+ U-Boot FIT image. This could specify further image to load and/or
+ execute.
+
+config SPL_FIT_GENERATOR
+ string ".its file generator script for U-Boot FIT image"
+ depends on SPL_FIT
+ help
+ Specifies a (platform specific) script file to generate the FIT
+ source file used to build the U-Boot FIT image file. This gets
+ passed a list of supported device tree file stub names to
+ include in the generated image.
+
endif # FIT
config OF_BOARD_SETUP
diff --git a/Makefile b/Makefile
index 38b42da..e09b0d9 100644
--- a/Makefile
+++ b/Makefile
@@ -826,6 +826,10 @@ quiet_cmd_mkimage = MKIMAGE $@
cmd_mkimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -d $< $@ \
$(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+quiet_cmd_mkfitimage = MKIMAGE $@
+cmd_mkfitimage = $(objtree)/tools/mkimage $(MKIMAGEFLAGS_$(@F)) -f
$(U_BOOT_ITS) -E $@ \
+ $(if $(KBUILD_VERBOSE:1=), >$(MKIMAGEOUTPUT))
+
quiet_cmd_cat = CAT $@
cmd_cat = cat $(filter-out $(PHONY), $^) > $@
@@ -945,6 +949,19 @@ quiet_cmd_cpp_cfg = CFG $@
cmd_cpp_cfg = $(CPP) -Wp,-MD,$(depfile) $(cpp_flags) $(LDPPFLAGS) -ansi \
-DDO_DEPS_ONLY -D__ASSEMBLY__ -x assembler-with-cpp -P -dM -E -o $@ $<
+# Boards with more complex image requirments can provide an .its source file
+# or a generator script
+ifneq ($(CONFIG_SPL_FIT_SOURCE),"")
+U_BOOT_ITS = $(subst ",,$(CONFIG_SPL_FIT_SOURCE))
+else
+ifneq ($(CONFIG_SPL_FIT_GENERATOR),"")
+U_BOOT_ITS := u-boot.its
+$(U_BOOT_ITS): FORCE
+ $(srctree)/$(CONFIG_SPL_FIT_GENERATOR) \
+ $(patsubst %,arch/$(ARCH)/dts/%.dtb,$(subst ",,$(CONFIG_OF_LIST))) > $@
+endif
+endif
+
ifdef CONFIG_SPL_LOAD_FIT
MKIMAGEFLAGS_u-boot.img = -f auto -A $(ARCH) -T firmware -C none -O u-boot \
-a $(CONFIG_SYS_TEXT_BASE) -e $(CONFIG_SYS_UBOOT_START) \
@@ -977,6 +994,9 @@ u-boot-dtb.img u-boot.img u-boot.kwb u-boot.pbl
u-boot-ivt.img: \
$(if $(CONFIG_SPL_LOAD_FIT),u-boot-nodtb.bin
dts/dt.dtb,u-boot.bin) FORCE
$(call if_changed,mkimage)
+u-boot.itb: u-boot-nodtb.bin dts/dt.dtb $(U_BOOT_ITS) FORCE
+ $(call if_changed,mkfitimage)
+
u-boot-spl.kwb: u-boot.img spl/u-boot-spl.bin FORCE
$(call if_changed,mkimage)
--
2.8.2
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