[POWERPC] Add Makefile rules to wrap dts file in zImage
Add 'zImage.dts' and 'zImage.dts_initrd' build rules that automatically
compile and wrap a dts file from arch/powerpc/boot/dts into the zImage file.
The resulting zImage will be arch/powerpc/boot/zImage.dts.<platform> and
arch/powerpc/boot/zImage.dts_initrd.<platform>, respectively.
Having separate rules allows the user to choose whether to include a device
tree--and which device tree--at build time. This is useful when one Makefile
target builds a zImage that runs on several platforms except for differing
device trees. By just setting CONFIG_DEVICE_TREE and running "make zImage.dts"
the exact zImage you want is built without Makefile bloat or manually running
the wrapper script.
The dts file is expected to be arch/powerpc/boot/dts/$(CONFIG_DEVICE_TREE)
Signed-off-by: Mark A. Greer <mgreer@mvista.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index 81a531d..d6014a6 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -148,7 +148,7 @@
CPPFLAGS_vmlinux.lds := -Upowerpc
-BOOT_TARGETS = zImage zImage.initrd uImage
+BOOT_TARGETS = zImage zImage.initrd zImage.dts zImage.dts_initrd uImage
PHONY += $(BOOT_TARGETS)
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index 5c384aa..01b6839 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -154,9 +154,27 @@
$(addprefix $(obj)/, $(initrd-y)): $(obj)/ramdisk.image.gz
+dts- := $(patsubst zImage%, zImage.dts%, $(image-n) $(image-))
+dts-y := $(patsubst zImage%, zImage.dts%, $(image-y))
+dts-y := $(filter-out $(image-y), $(dts-y))
+targets += $(image-y) $(dts-y)
+
+dts_initrd- := $(patsubst zImage%, zImage.dts_initrd%, $(image-n) $(image-))
+dts_initrd-y := $(patsubst zImage%, zImage.dts_initrd%, $(image-y))
+dts_initrd-y := $(filter-out $(image-y), $(dts_initrd-y))
+targets += $(image-y) $(dts_initrd-y)
+
+$(addprefix $(obj)/, $(dts_initrd-y)): $(obj)/ramdisk.image.gz
+
# Don't put the ramdisk on the pattern rule; when its missing make will try
# the pattern rule with less dependencies that also matches (even with the
# hard dependency listed).
+$(obj)/zImage.dts_initrd.%: vmlinux $(wrapperbits) $(dts) $(obj)/ramdisk.image.gz
+ $(call if_changed,wrap,$*,$(dts),,$(obj)/ramdisk.image.gz)
+
+$(obj)/zImage.dts.%: vmlinux $(wrapperbits) $(dts)
+ $(call if_changed,wrap,$*,$(dts))
+
$(obj)/zImage.initrd.%: vmlinux $(wrapperbits)
$(call if_changed,wrap,$*,,,$(obj)/ramdisk.image.gz)
@@ -195,13 +213,18 @@
@rm -f $@; ln $< $@
$(obj)/zImage.initrd: $(addprefix $(obj)/, $(initrd-y))
@rm -f $@; ln $< $@
+$(obj)/zImage.dts: $(addprefix $(obj)/, $(dts-y))
+ @rm -f $@; ln $< $@
+$(obj)/zImage.dts_initrd: $(addprefix $(obj)/, $(dts_initrd-y))
+ @rm -f $@; ln $< $@
+
install: $(CONFIGURE) $(addprefix $(obj)/, $(image-y))
sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" $<
# anything not in $(targets)
clean-files += $(image-) $(initrd-) zImage zImage.initrd cuImage.* \
- treeImage.*
+ treeImage.* zImage.dts zImage.dts_initrd
# clean up files cached by wrapper
clean-kernel := vmlinux.strip vmlinux.bin
