1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 648f1f058SSam RavnborgPHONY += klibcdirs 748f1f058SSam Ravnborg 8a26ee60fSAlain Knaff 9a26ee60fSAlain Knaff# Bzip2 10*9ba4bcb6SP J Psuffix_$(CONFIG_RD_BZIP2) = .bz2 11a26ee60fSAlain Knaff 12ab76f3d7SAlain Knaff# Lzma 13*9ba4bcb6SP J Psuffix_$(CONFIG_RD_LZMA) = .lzma 14d39a206bSSam Ravnborg 153ebe1243SLasse Collin# XZ 16*9ba4bcb6SP J Psuffix_$(CONFIG_RD_XZ) = .xz 173ebe1243SLasse Collin 182a2a400fSAlbin Tonnerre# Lzo 19*9ba4bcb6SP J Psuffix_$(CONFIG_RD_LZO) = .lzo 20*9ba4bcb6SP J P 21*9ba4bcb6SP J P# Lz4 22*9ba4bcb6SP J Psuffix_$(CONFIG_RD_LZ4) = .lz4 23*9ba4bcb6SP J P 24*9ba4bcb6SP J P# Gzip 25*9ba4bcb6SP J Psuffix_$(CONFIG_RD_GZIP) = .gz 262a2a400fSAlbin Tonnerre 276ae64e42SHendrik BruecknerAFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" 286ae64e42SHendrik Brueckner 29d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 306ae64e42SHendrik Bruecknerobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 311da177e4SLinus Torvalds 32a26ee60fSAlain Knaff# initramfs_data.o contains the compressed initramfs_data.cpio image. 331da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 341da177e4SLinus Torvalds# tracked automatically. 356ae64e42SHendrik Brueckner$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE 361da177e4SLinus Torvalds 37d39a206bSSam Ravnborg##### 38d39a206bSSam Ravnborg# Generate the initramfs cpio archive 39d39a206bSSam Ravnborg 40d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 41d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 42d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 43a26d79caSThomas Chou $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) 44d39a206bSSam Ravnborgramfs-args := \ 45d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 46ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 47d39a206bSSam Ravnborg 48a26ee60fSAlain Knaff# .initramfs_data.cpio.d is used to identify all files included 49d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 50d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 51d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 52a26ee60fSAlain Knaffifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) 53a26ee60fSAlain Knaff include $(obj)/.initramfs_data.cpio.d 541da177e4SLinus Torvaldsendif 551da177e4SLinus Torvalds 56d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 57d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 581da177e4SLinus Torvalds 59*9ba4bcb6SP J Ptargets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ 60*9ba4bcb6SP J P initramfs_data.cpio.lzma initramfs_data.cpio.xz \ 61*9ba4bcb6SP J P initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ 62*9ba4bcb6SP J P initramfs_data.cpio 6358a2f7d8SSam Ravnborg# do not try to update files included in initramfs 6458a2f7d8SSam Ravnborg$(deps_initramfs): ; 6558a2f7d8SSam Ravnborg 66d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 67a26ee60fSAlain Knaff# We rebuild initramfs_data.cpio if: 68a26ee60fSAlain Knaff# 1) Any included file is newer then initramfs_data.cpio 69d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 70a26ee60fSAlain Knaff# 3) If gen_init_cpio are newer than initramfs_data.cpio 71d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 72a26ee60fSAlain Knaff$(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 73a26ee60fSAlain Knaff $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d 74d39a206bSSam Ravnborg $(call if_changed,initfs) 75