| # |
| # kbuild file for usr/ - including initramfs image |
| # |
| |
| klibcdirs:; |
| PHONY += klibcdirs |
| |
| |
| # Bzip2 |
| suffix_$(CONFIG_RD_BZIP2) = .bz2 |
| |
| # Lzma |
| suffix_$(CONFIG_RD_LZMA) = .lzma |
| |
| # XZ |
| suffix_$(CONFIG_RD_XZ) = .xz |
| |
| # Lzo |
| suffix_$(CONFIG_RD_LZO) = .lzo |
| |
| # Lz4 |
| suffix_$(CONFIG_RD_LZ4) = .lz4 |
| |
| # Gzip |
| suffix_$(CONFIG_RD_GZIP) = .gz |
| |
| AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
| |
| # Generate builtin.o based on initramfs_data.o |
| obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
| |
| # initramfs_data.o contains the compressed initramfs_data.cpio image. |
| # The image is included using .incbin, a dependency which is not |
| # tracked automatically. |
| $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
| |
| ##### |
| # Generate the initramfs cpio archive |
| |
| hostprogs-y := gen_init_cpio |
| initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh |
| ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ |
| $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
| ramfs-args := \ |
| $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ |
| $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
| |
| # .initramfs_data.cpio.d is used to identify all files included |
| # in initramfs and to detect if any files are added/removed. |
| # Removed files are identified by directory timestamp being updated |
| # The dependency list is generated by gen_initramfs.sh -l |
| ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
| include $(obj)/.initramfs_data.cpio.d |
| endif |
| |
| quiet_cmd_initfs = GEN $@ |
| cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
| |
| targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ |
| initramfs_data.cpio.lzma initramfs_data.cpio.xz \ |
| initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ |
| initramfs_data.cpio |
| # do not try to update files included in initramfs |
| $(deps_initramfs): ; |
| |
| $(deps_initramfs): klibcdirs |
| # We rebuild initramfs_data.cpio if: |
| # 1) Any included file is newer then initramfs_data.cpio |
| # 2) There are changes in which files are included (added or deleted) |
| # 3) If gen_init_cpio are newer than initramfs_data.cpio |
| # 4) arguments to gen_initramfs.sh changes |
| $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
| $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d |
| $(call if_changed,initfs) |
