Commit | Line | Data |
---|---|---|
d39a206b SR |
1 | # |
2 | # kbuild file for usr/ - including initramfs image | |
3 | # | |
1da177e4 | 4 | |
d39a206b | 5 | klibcdirs:; |
48f1f058 SR |
6 | PHONY += klibcdirs |
7 | ||
a26ee60f | 8 | |
a26ee60f | 9 | # Bzip2 |
9ba4bcb6 | 10 | suffix_$(CONFIG_RD_BZIP2) = .bz2 |
a26ee60f | 11 | |
ab76f3d7 | 12 | # Lzma |
9ba4bcb6 | 13 | suffix_$(CONFIG_RD_LZMA) = .lzma |
1da177e4 | 14 | |
3ebe1243 | 15 | # XZ |
9ba4bcb6 | 16 | suffix_$(CONFIG_RD_XZ) = .xz |
3ebe1243 | 17 | |
2a2a400f | 18 | # Lzo |
9ba4bcb6 | 19 | suffix_$(CONFIG_RD_LZO) = .lzo |
20 | ||
21 | # Lz4 | |
22 | suffix_$(CONFIG_RD_LZ4) = .lz4 | |
23 | ||
24 | # Gzip | |
25 | suffix_$(CONFIG_RD_GZIP) = .gz | |
2a2a400f | 26 | |
6ae64e42 HB |
27 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
28 | ||
d39a206b | 29 | # Generate builtin.o based on initramfs_data.o |
6ae64e42 | 30 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
1da177e4 | 31 | |
a26ee60f | 32 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
1da177e4 LT |
33 | # The image is included using .incbin, a dependency which is not |
34 | # tracked automatically. | |
6ae64e42 | 35 | $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
1da177e4 | 36 | |
d39a206b SR |
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)), \ | |
a26d79ca | 43 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
d39a206b SR |
44 | ramfs-args := \ |
45 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ | |
ff541710 | 46 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
d39a206b | 47 | |
a26ee60f | 48 | # .initramfs_data.cpio.d is used to identify all files included |
d39a206b SR |
49 | # in initramfs and to detect if any files are added/removed. |
50 | # Removed files are identified by directory timestamp being updated | |
51 | # The dependency list is generated by gen_initramfs.sh -l | |
a26ee60f AK |
52 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
53 | include $(obj)/.initramfs_data.cpio.d | |
1da177e4 LT |
54 | endif |
55 | ||
d39a206b SR |
56 | quiet_cmd_initfs = GEN $@ |
57 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
58 | ||
9ba4bcb6 | 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 | |
58a2f7d8 SR |
63 | # do not try to update files included in initramfs |
64 | $(deps_initramfs): ; | |
65 | ||
d39a206b | 66 | $(deps_initramfs): klibcdirs |
a26ee60f AK |
67 | # We rebuild initramfs_data.cpio if: |
68 | # 1) Any included file is newer then initramfs_data.cpio | |
d39a206b | 69 | # 2) There are changes in which files are included (added or deleted) |
a26ee60f | 70 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
d39a206b | 71 | # 4) arguments to gen_initramfs.sh changes |
a26ee60f AK |
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 | |
d39a206b | 74 | $(call if_changed,initfs) |