1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 6d39a206bSSam Ravnborg 7d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 81da177e4SLinus Torvaldsobj-y := initramfs_data.o 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds# initramfs_data.o contains the initramfs_data.cpio.gz image. 111da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 121da177e4SLinus Torvalds# tracked automatically. 131da177e4SLinus Torvalds$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE 141da177e4SLinus Torvalds 15d39a206bSSam Ravnborg##### 16d39a206bSSam Ravnborg# Generate the initramfs cpio archive 17d39a206bSSam Ravnborg 18d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 19d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 20d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 21d39a206bSSam Ravnborg $(CONFIG_INITRAMFS_SOURCE),-d) 22d39a206bSSam Ravnborgramfs-args := \ 23d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 24*ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 25d39a206bSSam Ravnborg 26d39a206bSSam Ravnborg# .initramfs_data.cpio.gz.d is used to identify all files included 27d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 28d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 29d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 30d39a206bSSam Ravnborgifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),) 31d39a206bSSam Ravnborg include $(obj)/.initramfs_data.cpio.gz.d 321da177e4SLinus Torvaldsendif 331da177e4SLinus Torvalds 34d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 35d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 361da177e4SLinus Torvalds 37d39a206bSSam Ravnborgtargets := initramfs_data.cpio.gz 38d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 39d39a206bSSam Ravnborg# We rebuild initramfs_data.cpio.gz if: 40d39a206bSSam Ravnborg# 1) Any included file is newer then initramfs_data.cpio.gz 41d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 42d39a206bSSam Ravnborg# 3) If gen_init_cpio are newer than initramfs_data.cpio.gz 43d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 44d39a206bSSam Ravnborg$(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 45d39a206bSSam Ravnborg $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d 46d39a206bSSam Ravnborg $(call if_changed,initfs) 471da177e4SLinus Torvalds 48