1*b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 2d39a206bSSam Ravnborg# 3d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 4d39a206bSSam Ravnborg# 51da177e4SLinus Torvalds 6d39a206bSSam Ravnborgklibcdirs:; 748f1f058SSam RavnborgPHONY += klibcdirs 848f1f058SSam Ravnborg 9ae30ab4cSNicholas Pigginsuffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) 109e3596b0SNicholas Piggindatafile_y = initramfs_data.cpio$(suffix_y) 119e3596b0SNicholas PigginAFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" 129e3596b0SNicholas Piggin 136ae64e42SHendrik Brueckner 14d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 156ae64e42SHendrik Bruecknerobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 161da177e4SLinus Torvalds 17a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 181da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 191da177e4SLinus Torvalds# tracked automatically. 209e3596b0SNicholas Piggin$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE 211da177e4SLinus Torvalds 22d39a206bSSam Ravnborg##### 23d39a206bSSam Ravnborg# Generate the initramfs cpio archive 24d39a206bSSam Ravnborg 25d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 26d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 27d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 28a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 29d39a206bSSam Ravnborgramfs-args := \ 30d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 31ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 32d39a206bSSam Ravnborg 33a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 34d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 35d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 36d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 37a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 38a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 391da177e4SLinus Torvaldsendif 401da177e4SLinus Torvalds 41d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 42d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 431da177e4SLinus Torvalds 449e3596b0SNicholas Piggintargets := $(datafile_y) 459e3596b0SNicholas Piggin 4658a2f7d8SSam Ravnborg# do not try to update files included in initramfs 4758a2f7d8SSam Ravnborg$(deps_initramfs): ; 4858a2f7d8SSam Ravnborg 49d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 50a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 51a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 52d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 53a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 54d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 559e3596b0SNicholas Piggin$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 56a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 57d39a206bSSam Ravnborg $(call if_changed,initfs) 58