2006-04-11 05:24:32 -06:00
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#
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# kbuild file for usr/ - including initramfs image
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#
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2005-04-16 16:20:36 -06:00
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2006-04-11 05:24:32 -06:00
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klibcdirs:;
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2006-07-23 11:37:44 -06:00
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PHONY += klibcdirs
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2017-01-05 03:29:35 -07:00
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suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
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2010-09-17 16:24:09 -06:00
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AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)"
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2006-04-11 05:24:32 -06:00
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# Generate builtin.o based on initramfs_data.o
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2010-09-17 16:24:09 -06:00
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obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
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2005-04-16 16:20:36 -06:00
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2009-01-07 01:10:27 -07:00
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# initramfs_data.o contains the compressed initramfs_data.cpio image.
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2005-04-16 16:20:36 -06:00
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# The image is included using .incbin, a dependency which is not
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# tracked automatically.
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2010-09-17 16:24:09 -06:00
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$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
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2005-04-16 16:20:36 -06:00
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2006-04-11 05:24:32 -06:00
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#####
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# Generate the initramfs cpio archive
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hostprogs-y := gen_init_cpio
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initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
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ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
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2006-11-25 12:09:18 -07:00
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$(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
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2006-04-11 05:24:32 -06:00
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ramfs-args := \
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$(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
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2006-06-09 11:24:14 -06:00
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$(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
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2006-04-11 05:24:32 -06:00
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2009-01-07 01:10:27 -07:00
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# .initramfs_data.cpio.d is used to identify all files included
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2006-04-11 05:24:32 -06:00
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# in initramfs and to detect if any files are added/removed.
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# Removed files are identified by directory timestamp being updated
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# The dependency list is generated by gen_initramfs.sh -l
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2009-01-07 01:10:27 -07:00
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ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
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include $(obj)/.initramfs_data.cpio.d
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2005-04-16 16:20:36 -06:00
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endif
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2006-04-11 05:24:32 -06:00
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quiet_cmd_initfs = GEN $@
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cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
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2013-11-12 16:10:22 -07:00
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targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \
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initramfs_data.cpio.lzma initramfs_data.cpio.xz \
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initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \
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initramfs_data.cpio
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2006-08-07 12:58:28 -06:00
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# do not try to update files included in initramfs
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$(deps_initramfs): ;
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2006-04-11 05:24:32 -06:00
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$(deps_initramfs): klibcdirs
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2009-01-07 01:10:27 -07:00
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# We rebuild initramfs_data.cpio if:
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# 1) Any included file is newer then initramfs_data.cpio
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2006-04-11 05:24:32 -06:00
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# 2) There are changes in which files are included (added or deleted)
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2009-01-07 01:10:27 -07:00
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# 3) If gen_init_cpio are newer than initramfs_data.cpio
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2006-04-11 05:24:32 -06:00
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# 4) arguments to gen_initramfs.sh changes
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2009-01-07 01:10:27 -07:00
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$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
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$(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
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2006-04-11 05:24:32 -06:00
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$(call if_changed,initfs)
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