1# 2# kbuild file for usr/ - including initramfs image 3# 4 5klibcdirs:; 6PHONY += klibcdirs 7 8 9# Bzip2 10suffix_$(CONFIG_RD_BZIP2) = .bz2 11 12# Lzma 13suffix_$(CONFIG_RD_LZMA) = .lzma 14 15# XZ 16suffix_$(CONFIG_RD_XZ) = .xz 17 18# Lzo 19suffix_$(CONFIG_RD_LZO) = .lzo 20 21# Lz4 22suffix_$(CONFIG_RD_LZ4) = .lz4 23 24# Gzip 25suffix_$(CONFIG_RD_GZIP) = .gz 26 27AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" 28 29# Generate builtin.o based on initramfs_data.o 30obj-$(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 40hostprogs-y := gen_init_cpio 41initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 42ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 43 $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 44ramfs-args := \ 45 $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 46 $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 47 48# .initramfs_data.cpio.d is used to identify all files included 49# in initramfs and to detect if any files are added/removed. 50# Removed files are identified by directory timestamp being updated 51# The dependency list is generated by gen_initramfs.sh -l 52ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 53 include $(obj)/.initramfs_data.cpio.d 54endif 55 56quiet_cmd_initfs = GEN $@ 57 cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 58 59targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ 60 initramfs_data.cpio.lzma initramfs_data.cpio.xz \ 61 initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ 62 initramfs_data.cpio 63# do not try to update files included in initramfs 64$(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) 75