| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame] | 1 | # |
| 2 | # kbuild file for usr/ - including initramfs image |
| 3 | # |
| 4 | |
| 5 | klibcdirs:; |
| 6 | PHONY += klibcdirs |
| 7 | |
| 8 | |
| 9 | # Bzip2 |
| 10 | suffix_$(CONFIG_RD_BZIP2) = .bz2 |
| 11 | |
| 12 | # Lzma |
| 13 | suffix_$(CONFIG_RD_LZMA) = .lzma |
| 14 | |
| 15 | # XZ |
| 16 | suffix_$(CONFIG_RD_XZ) = .xz |
| 17 | |
| 18 | # Lzo |
| 19 | suffix_$(CONFIG_RD_LZO) = .lzo |
| 20 | |
| 21 | # Lz4 |
| 22 | suffix_$(CONFIG_RD_LZ4) = .lz4 |
| 23 | |
| 24 | # Gzip |
| 25 | suffix_$(CONFIG_RD_GZIP) = .gz |
| 26 | |
| 27 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
| 28 | |
| 29 | # Generate builtin.o based on initramfs_data.o |
| 30 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
| 31 | |
| 32 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
| 33 | # The image is included using .incbin, a dependency which is not |
| 34 | # tracked automatically. |
| 35 | $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
| 36 | |
| 37 | ##### |
| 38 | # Generate the initramfs cpio archive |
| 39 | |
| 40 | hostprogs-y := gen_init_cpio |
| 41 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh |
| 42 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ |
| 43 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
| 44 | ramfs-args := \ |
| 45 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ |
| 46 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
| 47 | |
| 48 | # .initramfs_data.cpio.d is used to identify all files included |
| 49 | # in initramfs and to detect if any files are added/removed. |
| 50 | # Removed files are identified by directory timestamp being updated |
| 51 | # The dependency list is generated by gen_initramfs.sh -l |
| 52 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
| 53 | include $(obj)/.initramfs_data.cpio.d |
| 54 | endif |
| 55 | |
| 56 | quiet_cmd_initfs = GEN $@ |
| 57 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
| 58 | |
| 59 | targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ |
| 60 | initramfs_data.cpio.lzma initramfs_data.cpio.xz \ |
| 61 | initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ |
| 62 | initramfs_data.cpio |
| 63 | # do not try to update files included in initramfs |
| 64 | $(deps_initramfs): ; |
| 65 | |
| 66 | $(deps_initramfs): klibcdirs |
| 67 | # We rebuild initramfs_data.cpio if: |
| 68 | # 1) Any included file is newer then initramfs_data.cpio |
| 69 | # 2) There are changes in which files are included (added or deleted) |
| 70 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
| 71 | # 4) arguments to gen_initramfs.sh changes |
| 72 | $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
| 73 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d |
| 74 | $(call if_changed,initfs) |