diff options
Diffstat (limited to 'usr/Makefile')
| -rw-r--r-- | usr/Makefile | 89 |
1 files changed, 60 insertions, 29 deletions
diff --git a/usr/Makefile b/usr/Makefile index 4ca452197834..244862bfb765 100644 --- a/usr/Makefile +++ b/usr/Makefile @@ -3,55 +3,86 @@ # kbuild file for usr/ - including initramfs image # -suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) -datafile_y = initramfs_data.cpio$(suffix_y) -datafile_d_y = .$(datafile_y).d -AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/$(datafile_y)" +# cmd_bzip2, cmd_lzma, cmd_lzo, cmd_lz4 from scripts/Makefile.lib appends the +# size at the end of the compressed file, which unfortunately does not work +# with unpack_to_rootfs(). Make size_append no-op. +override size_append := : -# clean rules do not have CONFIG_INITRAMFS_COMPRESSION. So clean up after all -# possible compression formats. -clean-files += initramfs_data.cpio* +compress-$(CONFIG_INITRAMFS_COMPRESSION_NONE) := shipped +compress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) := gzip +compress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) := bzip2 +compress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) := lzma +compress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) := xzmisc +compress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) := lzo +compress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) := lz4 -# 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: $(obj)/$(datafile_y) FORCE +$(obj)/initramfs_data.o: $(obj)/initramfs_inc_data -##### -# Generate the initramfs cpio archive +ramfs-input := $(strip $(shell echo $(CONFIG_INITRAMFS_SOURCE))) +cpio-data := + +# If CONFIG_INITRAMFS_SOURCE is empty, generate a small initramfs with the +# default contents. +ifeq ($(ramfs-input),) +ramfs-input := $(srctree)/$(src)/default_cpio_list +endif + +ifeq ($(words $(ramfs-input)),1) + +# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with +# .cpio, use it directly as an initramfs. +ifneq ($(filter %.cpio,$(ramfs-input)),) +cpio-data := $(ramfs-input) +endif + +# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with +# .cpio.*, use it directly as an initramfs, and avoid double compression. +ifeq ($(words $(subst .cpio.,$(space),$(ramfs-input))),2) +cpio-data := $(ramfs-input) +compress-y := shipped +endif + +endif + +# For other cases, generate the initramfs cpio archive based on the contents +# specified by CONFIG_INITRAMFS_SOURCE. +ifeq ($(cpio-data),) + +cpio-data := $(obj)/initramfs_data.cpio hostprogs-y := gen_init_cpio -ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ - $(shell echo $(CONFIG_INITRAMFS_SOURCE)),$(srctree)/$(src)/default_cpio_list) -ramfs-args := \ - $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ - $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) -# $(datafile_d_y) is used to identify all files included +# .initramfs_data.cpio.d is used to identify all files included # in initramfs and to detect if any files are added/removed. # Removed files are identified by directory timestamp being updated # The dependency list is generated by gen_initramfs.sh -l -ifneq ($(wildcard $(obj)/$(datafile_d_y)),) - include $(obj)/$(datafile_d_y) -endif - -quiet_cmd_initfs = GEN $@ - cmd_initfs = $(CONFIG_SHELL) $< -o $@ -l $(obj)/$(datafile_d_y) $(ramfs-args) $(ramfs-input) - -targets := $(datafile_y) +-include $(obj)/.initramfs_data.cpio.d # do not try to update files included in initramfs $(deps_initramfs): ; +quiet_cmd_initfs = GEN $@ + cmd_initfs = \ + $(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \ + $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ + $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \ + $(ramfs-input) + # We rebuild initramfs_data.cpio if: # 1) Any included file is newer than initramfs_data.cpio # 2) There are changes in which files are included (added or deleted) # 3) If gen_init_cpio are newer than initramfs_data.cpio # 4) Arguments to gen_initramfs.sh changes -$(obj)/$(datafile_y): $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE +$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE $(call if_changed,initfs) +endif + +$(obj)/initramfs_inc_data: $(cpio-data) FORCE + $(call if_changed,$(compress-y)) + +targets += initramfs_data.cpio initramfs_inc_data + subdir-$(CONFIG_UAPI_HEADER_TEST) += include |