Commit 916066d5 authored by Mark A. Greer's avatar Mark A. Greer Committed by Paul Mackerras
Browse files

[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: default avatarMark A. Greer <mgreer@mvista.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent a8de5ce9

arch/powerpc/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -148,7 +148,7 @@ all: $(KBUILD_IMAGE) 


CPPFLAGS_vmlinux.lds	:= -Upowerpc



BOOT_TARGETS = zImage zImage.initrd uImage

BOOT_TARGETS = zImage zImage.initrd zImage.dts zImage.dts_initrd uImage



PHONY += $(BOOT_TARGETS)

arch/powerpc/boot/Makefile

+24 −1
Original line number Diff line number Diff line
@@ -154,9 +154,27 @@ targets += $(image-y) $(initrd-y) 


$(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 @@ $(obj)/zImage: $(addprefix $(obj)/, $(image-y)) 
	@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

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