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Commit | Line | Data |
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b2441318 | 1 | # SPDX-License-Identifier: GPL-2.0 |
d39a206b SR |
2 | # |
3 | # kbuild file for usr/ - including initramfs image | |
4 | # | |
1da177e4 | 5 | |
d39a206b | 6 | klibcdirs:; |
48f1f058 SR |
7 | PHONY += klibcdirs |
8 | ||
ae30ab4c | 9 | suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) |
9e3596b0 | 10 | datafile_y = initramfs_data.cpio$(suffix_y) |
e08b1877 | 11 | datafile_d_y = .$(datafile_y).d |
9e3596b0 NP |
12 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" |
13 | ||
6279eb3d GT |
14 | # clean rules do not have CONFIG_INITRAMFS_COMPRESSION. So clean up after all |
15 | # possible compression formats. | |
16 | clean-files += initramfs_data.cpio* | |
6ae64e42 | 17 | |
d39a206b | 18 | # Generate builtin.o based on initramfs_data.o |
6ae64e42 | 19 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.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. | |
9e3596b0 | 24 | $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE |
1da177e4 | 25 | |
d39a206b SR |
26 | ##### |
27 | # Generate the initramfs cpio archive | |
28 | ||
29 | hostprogs-y := gen_init_cpio | |
f6f57a46 | 30 | initramfs := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh |
d39a206b | 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 | |
e08b1877 | 37 | # $(datafile_d_y) is used to identify all files included |
d39a206b SR |
38 | # in initramfs and to detect if any files are added/removed. |
39 | # Removed files are identified by directory timestamp being updated | |
40 | # The dependency list is generated by gen_initramfs.sh -l | |
e08b1877 FF |
41 | ifneq ($(wildcard $(obj)/$(datafile_d_y)),) |
42 | include $(obj)/$(datafile_d_y) | |
1da177e4 LT |
43 | endif |
44 | ||
d39a206b SR |
45 | quiet_cmd_initfs = GEN $@ |
46 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
47 | ||
9e3596b0 NP |
48 | targets := $(datafile_y) |
49 | ||
58a2f7d8 SR |
50 | # do not try to update files included in initramfs |
51 | $(deps_initramfs): ; | |
52 | ||
d39a206b | 53 | $(deps_initramfs): klibcdirs |
a26ee60f | 54 | # We rebuild initramfs_data.cpio if: |
c7fe0608 | 55 | # 1) Any included file is newer than initramfs_data.cpio |
d39a206b | 56 | # 2) There are changes in which files are included (added or deleted) |
a26ee60f | 57 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
c7fe0608 | 58 | # 4) Arguments to gen_initramfs.sh changes |
9e3596b0 | 59 | $(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
e08b1877 | 60 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y) |
d39a206b | 61 | $(call if_changed,initfs) |
d6fc9fcb MY |
62 | |
63 | subdir-$(CONFIG_UAPI_HEADER_TEST) += include |