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Commit | Line | Data |
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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 | |
0bc9f9e6 | 9 | # Gzip |
ab76f3d7 | 10 | suffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP) = .gz |
a26ee60f AK |
11 | |
12 | # Bzip2 | |
ab76f3d7 | 13 | suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2 |
a26ee60f | 14 | |
ab76f3d7 AK |
15 | # Lzma |
16 | suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma | |
1da177e4 | 17 | |
d39a206b | 18 | # Generate builtin.o based on initramfs_data.o |
a26ee60f | 19 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o |
1da177e4 | 20 | |
a26ee60f | 21 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
1da177e4 LT |
22 | # The image is included using .incbin, a dependency which is not |
23 | # tracked automatically. | |
a26ee60f | 24 | $(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
1da177e4 | 25 | |
d39a206b SR |
26 | ##### |
27 | # Generate the initramfs cpio archive | |
28 | ||
29 | hostprogs-y := gen_init_cpio | |
30 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh | |
31 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ | |
a26d79ca | 32 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
d39a206b SR |
33 | ramfs-args := \ |
34 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ | |
ff541710 | 35 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
d39a206b | 36 | |
a26ee60f | 37 | # .initramfs_data.cpio.d is used to identify all files included |
d39a206b SR |
38 | # in initramfs and to detect if any files are added/removed. |
39 | # Removed files are identified by directory timestamp being updated | |
40 | # The dependency list is generated by gen_initramfs.sh -l | |
a26ee60f AK |
41 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
42 | include $(obj)/.initramfs_data.cpio.d | |
1da177e4 LT |
43 | endif |
44 | ||
d39a206b SR |
45 | quiet_cmd_initfs = GEN $@ |
46 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
47 | ||
a26ee60f | 48 | targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio |
58a2f7d8 SR |
49 | # do not try to update files included in initramfs |
50 | $(deps_initramfs): ; | |
51 | ||
d39a206b | 52 | $(deps_initramfs): klibcdirs |
a26ee60f AK |
53 | # We rebuild initramfs_data.cpio if: |
54 | # 1) Any included file is newer then initramfs_data.cpio | |
d39a206b | 55 | # 2) There are changes in which files are included (added or deleted) |
a26ee60f | 56 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
d39a206b | 57 | # 4) arguments to gen_initramfs.sh changes |
a26ee60f AK |
58 | $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
59 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d | |
d39a206b | 60 | $(call if_changed,initfs) |
1da177e4 | 61 |