projects / linux.git / blame
| 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 | ||
| 35e669e1 | 8 | suffix_y = $(CONFIG_INITRAMFS_COMPRESSION) |
| 6ae64e42 HB |
9 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
| 10 | ||
| d39a206b | 11 | # Generate builtin.o based on initramfs_data.o |
| 6ae64e42 | 12 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
| 1da177e4 | 13 | |
| a26ee60f | 14 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
| 1da177e4 LT |
15 | # The image is included using .incbin, a dependency which is not |
| 16 | # tracked automatically. | |
| 6ae64e42 | 17 | $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
| 1da177e4 | 18 | |
| d39a206b SR |
19 | ##### |
| 20 | # Generate the initramfs cpio archive | |
| 21 | ||
| 22 | hostprogs-y := gen_init_cpio | |
| 23 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh | |
| 24 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ | |
| a26d79ca | 25 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
| d39a206b SR |
26 | ramfs-args := \ |
| 27 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ | |
| ff541710 | 28 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
| d39a206b | 29 | |
| a26ee60f | 30 | # .initramfs_data.cpio.d is used to identify all files included |
| d39a206b SR |
31 | # in initramfs and to detect if any files are added/removed. |
| 32 | # Removed files are identified by directory timestamp being updated | |
| 33 | # The dependency list is generated by gen_initramfs.sh -l | |
| a26ee60f AK |
34 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
| 35 | include $(obj)/.initramfs_data.cpio.d | |
| 1da177e4 LT |
36 | endif |
| 37 | ||
| d39a206b SR |
38 | quiet_cmd_initfs = GEN $@ |
| 39 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) | |
| 40 | ||
| 9ba4bcb6 | 41 | targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ |
| 42 | initramfs_data.cpio.lzma initramfs_data.cpio.xz \ | |
| 43 | initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ | |
| 44 | initramfs_data.cpio | |
| 58a2f7d8 SR |
45 | # do not try to update files included in initramfs |
| 46 | $(deps_initramfs): ; | |
| 47 | ||
| d39a206b | 48 | $(deps_initramfs): klibcdirs |
| a26ee60f AK |
49 | # We rebuild initramfs_data.cpio if: |
| 50 | # 1) Any included file is newer then initramfs_data.cpio | |
| d39a206b | 51 | # 2) There are changes in which files are included (added or deleted) |
| a26ee60f | 52 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
| d39a206b | 53 | # 4) arguments to gen_initramfs.sh changes |
| a26ee60f AK |
54 | $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
| 55 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d | |
| d39a206b | 56 | $(call if_changed,initfs) |