1b2441318SGreg 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$(suffix_y) 11e08b1877SFlorian Fainellidatafile_d_y = .$(datafile_y).d 129e3596b0SNicholas PigginAFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" 139e3596b0SNicholas Piggin 146ae64e42SHendrik Brueckner 15d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 166ae64e42SHendrik Bruecknerobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 171da177e4SLinus Torvalds 18a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 191da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 201da177e4SLinus Torvalds# tracked automatically. 219e3596b0SNicholas Piggin$(obj)/initramfs_data.o: $(obj)/$(datafile_y) FORCE 221da177e4SLinus Torvalds 23d39a206bSSam Ravnborg##### 24d39a206bSSam Ravnborg# Generate the initramfs cpio archive 25d39a206bSSam Ravnborg 26d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 27f6f57a46SMasahiro Yamadainitramfs := $(CONFIG_SHELL) $(srctree)/$(src)/gen_initramfs_list.sh 28d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 29a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 30d39a206bSSam Ravnborgramfs-args := \ 31d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 32ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 33d39a206bSSam Ravnborg 34e08b1877SFlorian Fainelli# $(datafile_d_y) is used to identify all files included 35d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 36d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 37d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 38e08b1877SFlorian Fainelliifneq ($(wildcard $(obj)/$(datafile_d_y)),) 39e08b1877SFlorian Fainelli include $(obj)/$(datafile_d_y) 401da177e4SLinus Torvaldsendif 411da177e4SLinus Torvalds 42d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 43d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 441da177e4SLinus Torvalds 459e3596b0SNicholas Piggintargets := $(datafile_y) 469e3596b0SNicholas Piggin 4758a2f7d8SSam Ravnborg# do not try to update files included in initramfs 4858a2f7d8SSam Ravnborg$(deps_initramfs): ; 4958a2f7d8SSam Ravnborg 50d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 51a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 52c7fe0608SEugen Cazacu# 1) Any included file is newer than initramfs_data.cpio 53d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 54a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 55c7fe0608SEugen Cazacu# 4) Arguments to gen_initramfs.sh changes 569e3596b0SNicholas Piggin$(obj)/$(datafile_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 57e08b1877SFlorian Fainelli $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/$(datafile_d_y) 58d39a206bSSam Ravnborg $(call if_changed,initfs) 59*d6fc9fcbSMasahiro Yamada 60*d6fc9fcbSMasahiro Yamadasubdir-$(CONFIG_UAPI_HEADER_TEST) += include 61