1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 648f1f058SSam RavnborgPHONY += klibcdirs 748f1f058SSam Ravnborg 8ae30ab4cSNicholas Pigginsuffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) 9*9e3596b0SNicholas Piggindatafile_y = initramfs_data.cpio$(suffix_y) 10*9e3596b0SNicholas PigginAFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" 11*9e3596b0SNicholas Piggin 126ae64e42SHendrik Brueckner 13d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 146ae64e42SHendrik Bruecknerobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 151da177e4SLinus Torvalds 16a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 171da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 181da177e4SLinus Torvalds# tracked automatically. 19*9e3596b0SNicholas Piggin$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE 201da177e4SLinus Torvalds 21d39a206bSSam Ravnborg##### 22d39a206bSSam Ravnborg# Generate the initramfs cpio archive 23d39a206bSSam Ravnborg 24d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 25d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 26d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 27a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 28d39a206bSSam Ravnborgramfs-args := \ 29d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 30ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 31d39a206bSSam Ravnborg 32a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 33d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 34d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 35d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 36a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 37a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 381da177e4SLinus Torvaldsendif 391da177e4SLinus Torvalds 40d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 41d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 421da177e4SLinus Torvalds 43*9e3596b0SNicholas Piggintargets := $(datafile_y) 44*9e3596b0SNicholas Piggin 4558a2f7d8SSam Ravnborg# do not try to update files included in initramfs 4658a2f7d8SSam Ravnborg$(deps_initramfs): ; 4758a2f7d8SSam Ravnborg 48d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 49a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 50a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 51d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 52a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 53d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 54*9e3596b0SNicholas Piggin$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 55a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 56d39a206bSSam Ravnborg $(call if_changed,initfs) 57