Makefile (4538f41305c3f2c35463c996663dbf6307030ad7) Makefile (65e00e04e5aea34b256814cfa21b32e3b94a2402)
1# SPDX-License-Identifier: GPL-2.0
2#
3# kbuild file for usr/ - including initramfs image
4#
5
1# SPDX-License-Identifier: GPL-2.0
2#
3# kbuild file for usr/ - including initramfs image
4#
5
6suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION))
7datafile_y = initramfs_data.cpio$(suffix_y)
8datafile_d_y = .$(datafile_y).d
9AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)"
6# cmd_bzip2, cmd_lzma, cmd_lzo, cmd_lz4 from scripts/Makefile.lib appends the
7# size at the end of the compressed file, which unfortunately does not work
8# with unpack_to_rootfs(). Make size_append no-op.
9override size_append := :
10
10
11# clean rules do not have CONFIG_INITRAMFS_COMPRESSION. So clean up after all
12# possible compression formats.
13clean-files += initramfs_data.cpio*
11compress-$(CONFIG_INITRAMFS_COMPRESSION_NONE) := shipped
12compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) := gzip
13compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) := bzip2
14compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) := lzma
15compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) := xzmisc
16compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) := lzo
17compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) := lz4
14
18
15# Generate builtin.o based on initramfs_data.o
16obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
17
19obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
20
18# initramfs_data.o contains the compressed initramfs_data.cpio image.
19# The image is included using .incbin, a dependency which is not
20# tracked automatically.
21$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE
21$(obj)/initramfs_data.o: $(obj)/initramfs_inc_data
22
22
23#####
24# Generate the initramfs cpio archive
23ramfs-input := $(strip $(shell echo $(CONFIG_INITRAMFS_SOURCE)))
24cpio-data :=
25
25
26# If CONFIG_INITRAMFS_SOURCE is empty, generate a small initramfs with the
27# default contents.
28ifeq ($(ramfs-input),)
29ramfs-input := $(srctree)/$(src)/default_cpio_list
30endif
31
32ifeq ($(words $(ramfs-input)),1)
33
34# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
35# .cpio, use it directly as an initramfs.
36ifneq ($(filter %.cpio,$(ramfs-input)),)
37cpio-data := $(ramfs-input)
38endif
39
40# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with
41# .cpio.*, use it directly as an initramfs, and avoid double compression.
42ifeq ($(words $(subst .cpio.,$(space),$(ramfs-input))),2)
43cpio-data := $(ramfs-input)
44compress-y := shipped
45endif
46
47endif
48
49# For other cases, generate the initramfs cpio archive based on the contents
50# specified by CONFIG_INITRAMFS_SOURCE.
51ifeq ($(cpio-data),)
52
53cpio-data := $(obj)/initramfs_data.cpio
54
26hostprogs-y := gen_init_cpio
55hostprogs-y := gen_init_cpio
27ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \
28 $(shell echo $(CONFIG_INITRAMFS_SOURCE)),$(srctree)/$(src)/default_cpio_list)
29ramfs-args := \
30 $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
31 $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID))
32
56
33# $(datafile_d_y) is used to identify all files included
57# .initramfs_data.cpio.d is used to identify all files included
34# in initramfs and to detect if any files are added/removed.
35# Removed files are identified by directory timestamp being updated
36# The dependency list is generated by gen_initramfs.sh -l
58# in initramfs and to detect if any files are added/removed.
59# Removed files are identified by directory timestamp being updated
60# The dependency list is generated by gen_initramfs.sh -l
37ifneq ($(wildcard $(obj)/$(datafile_d_y)),)
38 include $(obj)/$(datafile_d_y)
39endif
61-include $(obj)/.initramfs_data.cpio.d
40
62
41quiet_cmd_initfs = GEN $@
42 cmd_initfs = $(CONFIG_SHELL) $< -o $@ -l $(obj)/$(datafile_d_y) $(ramfs-args) $(ramfs-input)
43
44targets := $(datafile_y)
45
46# do not try to update files included in initramfs
47$(deps_initramfs): ;
48
63# do not try to update files included in initramfs
64$(deps_initramfs): ;
65
66quiet_cmd_initfs = GEN $@
67 cmd_initfs = \
68 $(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \
69 $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \
70 $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \
71 $(ramfs-input)
72
49# We rebuild initramfs_data.cpio if:
50# 1) Any included file is newer than initramfs_data.cpio
51# 2) There are changes in which files are included (added or deleted)
52# 3) If gen_init_cpio are newer than initramfs_data.cpio
53# 4) Arguments to gen_initramfs.sh changes
73# We rebuild initramfs_data.cpio if:
74# 1) Any included file is newer than initramfs_data.cpio
75# 2) There are changes in which files are included (added or deleted)
76# 3) If gen_init_cpio are newer than initramfs_data.cpio
77# 4) Arguments to gen_initramfs.sh changes
54$(obj)/$(datafile_y): $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE
78$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE
55 $(call if_changed,initfs)
56
79 $(call if_changed,initfs)
80
81endif
82
83$(obj)/initramfs_inc_data: $(cpio-data) FORCE
84 $(call if_changed,$(compress-y))
85
86targets += initramfs_data.cpio initramfs_inc_data
87
57subdir-$(CONFIG_UAPI_HEADER_TEST) += include
88subdir-$(CONFIG_UAPI_HEADER_TEST) += include