1 # SPDX-License-Identifier: GPL-2.0 <<
2 # <<
3 # kbuild file for usr/ - including initramfs i <<
4 # <<
5 <<
6 compress-y <<
7 compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) <<
8 compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) <<
9 compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) <<
10 compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) <<
11 compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) <<
12 compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) <<
13 compress-$(CONFIG_INITRAMFS_COMPRESSION_ZSTD) <<
14 <<
15 obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data <<
16 <<
17 $(obj)/initramfs_data.o: $(obj)/initramfs_inc_ <<
18 <<
19 ramfs-input := $(CONFIG_INITRAMFS_SOURCE) <<
20 cpio-data := <<
21 <<
22 # If CONFIG_INITRAMFS_SOURCE is empty, generat <<
23 # default contents. <<
24 ifeq ($(ramfs-input),) <<
25 ramfs-input := $(src)/default_cpio_list <<
26 endif <<
27 <<
28 ifeq ($(words $(ramfs-input)),1) <<
29 <<
30 # If CONFIG_INITRAMFS_SOURCE specifies a singl <<
31 # .cpio, use it directly as an initramfs. <<
32 ifneq ($(filter %.cpio,$(ramfs-input)),) <<
33 cpio-data := $(ramfs-input) <<
34 endif <<
35 <<
36 # If CONFIG_INITRAMFS_SOURCE specifies a singl <<
37 # .cpio.*, use it directly as an initramfs, an <<
38 ifeq ($(words $(subst .cpio.,$(space),$(ramfs- <<
39 cpio-data := $(ramfs-input) <<
40 compress-y := copy <<
41 endif <<
42 <<
43 endif <<
44 <<
45 # For other cases, generate the initramfs cpio <<
46 # specified by CONFIG_INITRAMFS_SOURCE. <<
47 ifeq ($(cpio-data),) <<
48 <<
49 cpio-data := $(obj)/initramfs_data.cpio <<
50 <<
51 hostprogs := gen_init_cpio <<
52 <<
53 # .initramfs_data.cpio.d is used to identify a <<
54 # in initramfs and to detect if any files are <<
55 # Removed files are identified by directory ti <<
56 # The dependency list is generated by gen_init <<
57 -include $(obj)/.initramfs_data.cpio.d <<
58 <<
59 # do not try to update files included in initr <<
60 $(deps_initramfs): ; <<
61 <<
62 quiet_cmd_initfs = GEN $@ <<
63 cmd_initfs = \ <<
64 $(CONFIG_SHELL) $< -o $@ -l $(obj)/.in <<
65 $(addprefix -u , $(CONFIG_INITRAMFS_RO <<
66 $(addprefix -g , $(CONFIG_INITRAMFS_RO <<
67 $(if $(KBUILD_BUILD_TIMESTAMP), -d "$( <<
68 $(ramfs-input) <<
69 <<
70 # We rebuild initramfs_data.cpio if: <<
71 # 1) Any included file is newer than initramfs <<
72 # 2) There are changes in which files are incl <<
73 # 3) If gen_init_cpio are newer than initramfs <<
74 # 4) Arguments to gen_initramfs.sh changes <<
75 $(obj)/initramfs_data.cpio: $(src)/gen_initram <<
76 $(call if_changed,initfs) <<
77 1
78 endif !! 2 obj-y := initramfs_data.o
79 3
80 $(obj)/initramfs_inc_data: $(cpio-data) FORCE !! 4 host-progs := gen_init_cpio
81 $(call if_changed,$(compress-y)) <<
82 5
83 targets += initramfs_data.cpio initramfs_inc_d !! 6 clean-files := initramfs_data.cpio.gz
>> 7
>> 8 # initramfs_data.o contains the initramfs_data.cpio.gz image.
>> 9 # The image is included using .incbin, a dependency which is not
>> 10 # tracked automatically.
>> 11 $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
>> 12
>> 13 # initramfs-y are the programs which will be copied into the CPIO
>> 14 # archive. Currently, the filenames are hardcoded in gen_init_cpio,
>> 15 # but we need the information for the build as well, so it's duplicated
>> 16 # here.
>> 17
>> 18 # Commented out for now
>> 19 # initramfs-y := $(obj)/root/hello
>> 20
>> 21 quiet_cmd_cpio = CPIO $@
>> 22 cmd_cpio = ./$< > $@
>> 23
>> 24 $(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio $(initramfs-y) FORCE
>> 25 $(call if_changed,cpio)
>> 26
>> 27 targets += initramfs_data.cpio
>> 28
>> 29 $(obj)/initramfs_data.cpio.gz: $(obj)/initramfs_data.cpio FORCE
>> 30 $(call if_changed,gzip)
>> 31
>> 32 targets += initramfs_data.cpio.gz
84 33
85 subdir-$(CONFIG_UAPI_HEADER_TEST) += include <<
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