blob: e767f019accfa6a90374a270056739d09e93b920
1 | # |
2 | # kbuild file for usr/ - including initramfs image |
3 | # |
4 | |
5 | klibcdirs:; |
6 | PHONY += klibcdirs |
7 | |
8 | |
9 | # Bzip2 |
10 | suffix_$(CONFIG_RD_BZIP2) = .bz2 |
11 | |
12 | # Lzma |
13 | suffix_$(CONFIG_RD_LZMA) = .lzma |
14 | |
15 | # XZ |
16 | suffix_$(CONFIG_RD_XZ) = .xz |
17 | |
18 | # Lzo |
19 | suffix_$(CONFIG_RD_LZO) = .lzo |
20 | |
21 | # Lz4 |
22 | suffix_$(CONFIG_RD_LZ4) = .lz4 |
23 | |
24 | # Gzip |
25 | suffix_$(CONFIG_RD_GZIP) = .gz |
26 | |
27 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
28 | |
29 | # Generate builtin.o based on initramfs_data.o |
30 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
31 | |
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 |
36 | |
37 | ##### |
38 | # Generate the initramfs cpio archive |
39 | |
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) |
44 | ramfs-args := \ |
45 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ |
46 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
47 | |
48 | # .initramfs_data.cpio.d is used to identify all files included |
49 | # in initramfs and to detect if any files are added/removed. |
50 | # Removed files are identified by directory timestamp being updated |
51 | # The dependency list is generated by gen_initramfs.sh -l |
52 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
53 | include $(obj)/.initramfs_data.cpio.d |
54 | endif |
55 | |
56 | quiet_cmd_initfs = GEN $@ |
57 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
58 | |
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 \ |
62 | initramfs_data.cpio |
63 | # do not try to update files included in initramfs |
64 | $(deps_initramfs): ; |
65 | |
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) |
75 |