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_$(CONFIG_INITRAMFS_COMPRESSION_LZMA) = .lzma 17d39a206bSSam Ravnborg 18*2a2a400fSAlbin Tonnerre# Lzo 19*2a2a400fSAlbin Tonnerresuffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO) = .lzo 20*2a2a400fSAlbin Tonnerre 21d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 22a26ee60fSAlain Knaffobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o 231da177e4SLinus Torvalds 24a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 251da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 261da177e4SLinus Torvalds# tracked automatically. 27a26ee60fSAlain Knaff$(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE 281da177e4SLinus Torvalds 29d39a206bSSam Ravnborg##### 30d39a206bSSam Ravnborg# Generate the initramfs cpio archive 31d39a206bSSam Ravnborg 32d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 33d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 34d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 35a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 36d39a206bSSam Ravnborgramfs-args := \ 37d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 38ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 39d39a206bSSam Ravnborg 40a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 41d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 42d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 43d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 44a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 45a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 461da177e4SLinus Torvaldsendif 471da177e4SLinus Torvalds 48d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 49d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 501da177e4SLinus Torvalds 51*2a2a400fSAlbin Tonnerretargets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio.lzo initramfs_data.cpio 5258a2f7d8SSam Ravnborg# do not try to update files included in initramfs 5358a2f7d8SSam Ravnborg$(deps_initramfs): ; 5458a2f7d8SSam Ravnborg 55d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 56a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 57a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 58d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 59a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 60d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 61a26ee60fSAlain Knaff$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 62a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 63d39a206bSSam Ravnborg $(call if_changed,initfs) 641da177e4SLinus Torvalds 65