2 # kbuild file for usr/ - including initramfs image
10 suffix_$(CONFIG_RD_BZIP2) = .bz2
13 suffix_$(CONFIG_RD_LZMA) = .lzma
16 suffix_$(CONFIG_RD_XZ) = .xz
19 suffix_$(CONFIG_RD_LZO) = .lzo
22 suffix_$(CONFIG_RD_LZ4) = .lz4
25 suffix_$(CONFIG_RD_GZIP) = .gz
27 AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)"
29 # Generate builtin.o based on initramfs_data.o
30 obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
32 # initramfs_data.o contains the compressed initramfs_data.cpio image.
33 # The image is included using .incbin, a dependency which is not
34 # tracked automatically.
35 $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
38 # Generate the initramfs cpio archive
40 hostprogs-y := gen_init_cpio
41 initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh
42 ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
43 $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d)
45 $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
46 $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
48 # .initramfs_data.cpio.d is used to identify all files included
49 # in initramfs and to detect if any files are added/removed.
50 # Removed files are identified by directory timestamp being updated
51 # The dependency list is generated by gen_initramfs.sh -l
52 ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),)
53 include $(obj)/.initramfs_data.cpio.d
56 quiet_cmd_initfs = GEN $@
57 cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
59 targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \
60 initramfs_data.cpio.lzma initramfs_data.cpio.xz \
61 initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \
63 # do not try to update files included in initramfs
66 $(deps_initramfs): klibcdirs
67 # We rebuild initramfs_data.cpio if:
68 # 1) Any included file is newer then initramfs_data.cpio
69 # 2) There are changes in which files are included (added or deleted)
70 # 3) If gen_init_cpio are newer than initramfs_data.cpio
71 # 4) arguments to gen_initramfs.sh changes
72 $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs
73 $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d
74 $(call if_changed,initfs)