1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 648f1f058SSam RavnborgPHONY += klibcdirs 748f1f058SSam Ravnborg 8a26ee60fSAlain Knaff 9*0bc9f9e6SRobert P. J. Day# Gzip 10ab76f3d7SAlain Knaffsuffix_$(CONFIG_INITRAMFS_COMPRESSION_GZIP) = .gz 11a26ee60fSAlain Knaff 12a26ee60fSAlain Knaff# Bzip2 13ab76f3d7SAlain Knaffsuffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) = .bz2 14a26ee60fSAlain Knaff 15ab76f3d7SAlain Knaff# Lzma 16ab76f3d7SAlain Knaffsuffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma 17d39a206bSSam Ravnborg 18d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 19a26ee60fSAlain Knaffobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o 201da177e4SLinus Torvalds 21a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 221da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 231da177e4SLinus Torvalds# tracked automatically. 24a26ee60fSAlain Knaff$(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE 251da177e4SLinus Torvalds 26d39a206bSSam Ravnborg##### 27d39a206bSSam Ravnborg# Generate the initramfs cpio archive 28d39a206bSSam Ravnborg 29d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 30d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 31d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 32a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 33d39a206bSSam Ravnborgramfs-args := \ 34d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 35ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 36d39a206bSSam Ravnborg 37a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 38d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 39d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 40d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 41a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 42a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 431da177e4SLinus Torvaldsendif 441da177e4SLinus Torvalds 45d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 46d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 471da177e4SLinus Torvalds 48a26ee60fSAlain Knafftargets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio 4958a2f7d8SSam Ravnborg# do not try to update files included in initramfs 5058a2f7d8SSam Ravnborg$(deps_initramfs): ; 5158a2f7d8SSam Ravnborg 52d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 53a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 54a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 55d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 56a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 57d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 58a26ee60fSAlain Knaff$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 59a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 60d39a206bSSam Ravnborg $(call if_changed,initfs) 611da177e4SLinus Torvalds 62