1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 648f1f058SSam RavnborgPHONY += klibcdirs 748f1f058SSam Ravnborg 8a26ee60fSAlain Knaff 90bc9f9e6SRobert 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_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma 17d39a206bSSam Ravnborg 18*3ebe1243SLasse Collin# XZ 19*3ebe1243SLasse Collinsuffix_$(CONFIG_INITRAMFS_COMPRESSION_XZ) = .xz 20*3ebe1243SLasse Collin 212a2a400fSAlbin Tonnerre# Lzo 222a2a400fSAlbin Tonnerresuffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO) = .lzo 232a2a400fSAlbin Tonnerre 246ae64e42SHendrik BruecknerAFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" 256ae64e42SHendrik Brueckner 26d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 276ae64e42SHendrik Bruecknerobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 281da177e4SLinus Torvalds 29a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 301da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 311da177e4SLinus Torvalds# tracked automatically. 326ae64e42SHendrik Brueckner$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE 331da177e4SLinus Torvalds 34d39a206bSSam Ravnborg##### 35d39a206bSSam Ravnborg# Generate the initramfs cpio archive 36d39a206bSSam Ravnborg 37d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 38d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 39d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 40a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 41d39a206bSSam Ravnborgramfs-args := \ 42d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 43ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 44d39a206bSSam Ravnborg 45a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 46d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 47d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 48d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 49a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 50a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 511da177e4SLinus Torvaldsendif 521da177e4SLinus Torvalds 53d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 54d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 551da177e4SLinus Torvalds 56*3ebe1243SLasse Collintargets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio.xz initramfs_data.cpio.lzo initramfs_data.cpio 5758a2f7d8SSam Ravnborg# do not try to update files included in initramfs 5858a2f7d8SSam Ravnborg$(deps_initramfs): ; 5958a2f7d8SSam Ravnborg 60d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 61a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 62a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 63d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 64a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 65d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 66a26ee60fSAlain Knaff$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 67a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 68d39a206bSSam Ravnborg $(call if_changed,initfs) 691da177e4SLinus Torvalds 70