1d39a206bSSam Ravnborg# 2d39a206bSSam Ravnborg# kbuild file for usr/ - including initramfs image 3d39a206bSSam Ravnborg# 41da177e4SLinus Torvalds 5d39a206bSSam Ravnborgklibcdirs:; 6*48f1f058SSam RavnborgPHONY += klibcdirs 7*48f1f058SSam Ravnborg 8d39a206bSSam Ravnborg 9d39a206bSSam Ravnborg# Generate builtin.o based on initramfs_data.o 101da177e4SLinus Torvaldsobj-y := initramfs_data.o 111da177e4SLinus Torvalds 121da177e4SLinus Torvalds# initramfs_data.o contains the initramfs_data.cpio.gz image. 131da177e4SLinus Torvalds# The image is included using .incbin, a dependency which is not 141da177e4SLinus Torvalds# tracked automatically. 151da177e4SLinus Torvalds$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE 161da177e4SLinus Torvalds 17d39a206bSSam Ravnborg##### 18d39a206bSSam Ravnborg# Generate the initramfs cpio archive 19d39a206bSSam Ravnborg 20d39a206bSSam Ravnborghostprogs-y := gen_init_cpio 21d39a206bSSam Ravnborginitramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh 22d39a206bSSam Ravnborgramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ 23d39a206bSSam Ravnborg $(CONFIG_INITRAMFS_SOURCE),-d) 24d39a206bSSam Ravnborgramfs-args := \ 25d39a206bSSam Ravnborg $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 26ff541710SNickolay $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) 27d39a206bSSam Ravnborg 28d39a206bSSam Ravnborg# .initramfs_data.cpio.gz.d is used to identify all files included 29d39a206bSSam Ravnborg# in initramfs and to detect if any files are added/removed. 30d39a206bSSam Ravnborg# Removed files are identified by directory timestamp being updated 31d39a206bSSam Ravnborg# The dependency list is generated by gen_initramfs.sh -l 32d39a206bSSam Ravnborgifneq ($(wildcard $(obj)/.initramfs_data.cpio.gz.d),) 33d39a206bSSam Ravnborg include $(obj)/.initramfs_data.cpio.gz.d 341da177e4SLinus Torvaldsendif 351da177e4SLinus Torvalds 36d39a206bSSam Ravnborgquiet_cmd_initfs = GEN $@ 37d39a206bSSam Ravnborg cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) 381da177e4SLinus Torvalds 39d39a206bSSam Ravnborgtargets := initramfs_data.cpio.gz 4058a2f7d8SSam Ravnborg# do not try to update files included in initramfs 4158a2f7d8SSam Ravnborg$(deps_initramfs): ; 4258a2f7d8SSam Ravnborg 43d39a206bSSam Ravnborg$(deps_initramfs): klibcdirs 44d39a206bSSam Ravnborg# We rebuild initramfs_data.cpio.gz if: 45d39a206bSSam Ravnborg# 1) Any included file is newer then initramfs_data.cpio.gz 46d39a206bSSam Ravnborg# 2) There are changes in which files are included (added or deleted) 47d39a206bSSam Ravnborg# 3) If gen_init_cpio are newer than initramfs_data.cpio.gz 48d39a206bSSam Ravnborg# 4) arguments to gen_initramfs.sh changes 49d39a206bSSam Ravnborg$(obj)/initramfs_data.cpio.gz: $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs 50d39a206bSSam Ravnborg $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.gz.d 51d39a206bSSam Ravnborg $(call if_changed,initfs) 521da177e4SLinus Torvalds 53