projects / thirdparty / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | 51 | # We rebuild initramfs_data.cpio if: |
| c7fe0608 | 52 | # 1) Any included file is newer than 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 |
| c7fe0608 | 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) |