2 # kbuild file for usr/ - including initramfs image
8 suffix_y
= $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION
))
9 AFLAGS_initramfs_data.o
+= -DINITRAMFS_IMAGE
="usr/initramfs_data.cpio$(suffix_y)"
11 # Generate builtin.o based on initramfs_data.o
12 obj-
$(CONFIG_BLK_DEV_INITRD
) := initramfs_data.o
14 # initramfs_data.o contains the compressed initramfs_data.cpio image.
15 # The image is included using .incbin, a dependency which is not
16 # tracked automatically.
17 $(obj
)/initramfs_data.o
: $(obj
)/initramfs_data.cpio
$(suffix_y
) FORCE
20 # Generate the initramfs cpio archive
22 hostprogs-y
:= gen_init_cpio
23 initramfs
:= $(CONFIG_SHELL
) $(srctree
)/scripts
/gen_initramfs_list.sh
24 ramfs-input
:= $(if
$(filter-out "",$(CONFIG_INITRAMFS_SOURCE
)), \
25 $(shell echo
$(CONFIG_INITRAMFS_SOURCE
)),-d
)
27 $(if
$(CONFIG_INITRAMFS_ROOT_UID
), -u
$(CONFIG_INITRAMFS_ROOT_UID
)) \
28 $(if
$(CONFIG_INITRAMFS_ROOT_GID
), -g
$(CONFIG_INITRAMFS_ROOT_GID
))
30 # .initramfs_data.cpio.d is used to identify all files included
31 # in initramfs and to detect if any files are added/removed.
32 # Removed files are identified by directory timestamp being updated
33 # The dependency list is generated by gen_initramfs.sh -l
34 ifneq ($(wildcard $(obj
)/.initramfs_data.cpio.d
),)
35 include $(obj
)/.initramfs_data.cpio.d
38 quiet_cmd_initfs
= GEN
$@
39 cmd_initfs
= $(initramfs
) -o
$@
$(ramfs-args
) $(ramfs-input
)
41 targets
:= initramfs_data.cpio.gz initramfs_data.cpio.bz2 \
42 initramfs_data.cpio.lzma initramfs_data.cpio.xz \
43 initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \
45 # do not try to update files included in initramfs
48 $(deps_initramfs
): klibcdirs
49 # We rebuild initramfs_data.cpio if:
50 # 1) Any included file is newer then initramfs_data.cpio
51 # 2) There are changes in which files are included (added or deleted)
52 # 3) If gen_init_cpio are newer than initramfs_data.cpio
53 # 4) arguments to gen_initramfs.sh changes
54 $(obj
)/initramfs_data.cpio
$(suffix_y
): $(obj
)/gen_init_cpio
$(deps_initramfs
) klibcdirs
55 $(Q
)$(initramfs
) -l
$(ramfs-input
) > $(obj
)/.initramfs_data.cpio.d
56 $(call if_changed
,initfs
)