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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/$(datafile_y)" |
13 | ||
6ae64e42 | 14 | |
d39a206b | 15 | # Generate builtin.o based on initramfs_data.o |
6ae64e42 | 16 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
1da177e4 | 17 | |
a26ee60f | 18 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
1da177e4 LT |
19 | # The image is included using .incbin, a dependency which is not |
20 | # tracked automatically. | |
9e3596b0 | 21 | $(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE |
1da177e4 | 22 | |
d39a206b SR |
23 | ##### |
24 | # Generate the initramfs cpio archive | |
25 | ||
26 | hostprogs-y := gen_init_cpio | |
f6f57a46 | 27 | initramfs := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh |
d39a206b | 28 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ |
a26d79ca | 29 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
d39a206b SR |
30 | ramfs-args := \ |
31 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ | |
ff541710 | 32 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
d39a206b | 33 | |
e08b1877 | 34 | # $(datafile_d_y) is used to identify all files included |
d39a206b SR |
35 | # in initramfs and to detect if any files are added/removed. |
36 | # Removed files are identified by directory timestamp being updated | |
37 | # The dependency list is generated by gen_initramfs.sh -l | |
e08b1877 FF |
38 | ifneq ($(wildcard $(obj)/$(datafile_d_y)),) |
39 | include $(obj)/$(datafile_d_y) | |
1da177e4 LT |
40 | endif |
41 | ||
d39a206b SR |
42 | quiet_cmd_initfs = GEN $@ |
43 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
44 | ||
9e3596b0 NP |
45 | targets := $(datafile_y) |
46 | ||
58a2f7d8 SR |
47 | # do not try to update files included in initramfs |
48 | $(deps_initramfs): ; | |
49 | ||
d39a206b | 50 | $(deps_initramfs): klibcdirs |
a26ee60f AK |
51 | # We rebuild initramfs_data.cpio if: |
52 | # 1) Any included file is newer then initramfs_data.cpio | |
d39a206b | 53 | # 2) There are changes in which files are included (added or deleted) |
a26ee60f | 54 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
d39a206b | 55 | # 4) arguments to gen_initramfs.sh changes |
9e3596b0 | 56 | $(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
e08b1877 | 57 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y) |
d39a206b | 58 | $(call if_changed,initfs) |