18c2ecf20Sopenharmony_ci# SPDX-License-Identifier: GPL-2.0 28c2ecf20Sopenharmony_ci# 38c2ecf20Sopenharmony_ci# kbuild file for usr/ - including initramfs image 48c2ecf20Sopenharmony_ci# 58c2ecf20Sopenharmony_ci 68c2ecf20Sopenharmony_ci# cmd_bzip2, cmd_lzma, cmd_lzo, cmd_lz4 from scripts/Makefile.lib appends the 78c2ecf20Sopenharmony_ci# size at the end of the compressed file, which unfortunately does not work 88c2ecf20Sopenharmony_ci# with unpack_to_rootfs(). Make size_append no-op. 98c2ecf20Sopenharmony_cioverride size_append := : 108c2ecf20Sopenharmony_ci 118c2ecf20Sopenharmony_cicompress-y := shipped 128c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_GZIP) := gzip 138c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_BZIP2) := bzip2 148c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_LZMA) := lzma 158c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_XZ) := xzmisc 168c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_LZO) := lzo 178c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_LZ4) := lz4 188c2ecf20Sopenharmony_cicompress-$(CONFIG_INITRAMFS_COMPRESSION_ZSTD) := zstd 198c2ecf20Sopenharmony_ci 208c2ecf20Sopenharmony_ciobj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o 218c2ecf20Sopenharmony_ci 228c2ecf20Sopenharmony_ci$(obj)/initramfs_data.o: $(obj)/initramfs_inc_data 238c2ecf20Sopenharmony_ci 248c2ecf20Sopenharmony_ciramfs-input := $(strip $(shell echo $(CONFIG_INITRAMFS_SOURCE))) 258c2ecf20Sopenharmony_cicpio-data := 268c2ecf20Sopenharmony_ci 278c2ecf20Sopenharmony_ci# If CONFIG_INITRAMFS_SOURCE is empty, generate a small initramfs with the 288c2ecf20Sopenharmony_ci# default contents. 298c2ecf20Sopenharmony_ciifeq ($(ramfs-input),) 308c2ecf20Sopenharmony_ciramfs-input := $(srctree)/$(src)/default_cpio_list 318c2ecf20Sopenharmony_ciendif 328c2ecf20Sopenharmony_ci 338c2ecf20Sopenharmony_ciifeq ($(words $(ramfs-input)),1) 348c2ecf20Sopenharmony_ci 358c2ecf20Sopenharmony_ci# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with 368c2ecf20Sopenharmony_ci# .cpio, use it directly as an initramfs. 378c2ecf20Sopenharmony_ciifneq ($(filter %.cpio,$(ramfs-input)),) 388c2ecf20Sopenharmony_cicpio-data := $(ramfs-input) 398c2ecf20Sopenharmony_ciendif 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci# If CONFIG_INITRAMFS_SOURCE specifies a single file, and it is suffixed with 428c2ecf20Sopenharmony_ci# .cpio.*, use it directly as an initramfs, and avoid double compression. 438c2ecf20Sopenharmony_ciifeq ($(words $(subst .cpio.,$(space),$(ramfs-input))),2) 448c2ecf20Sopenharmony_cicpio-data := $(ramfs-input) 458c2ecf20Sopenharmony_cicompress-y := shipped 468c2ecf20Sopenharmony_ciendif 478c2ecf20Sopenharmony_ci 488c2ecf20Sopenharmony_ciendif 498c2ecf20Sopenharmony_ci 508c2ecf20Sopenharmony_ci# For other cases, generate the initramfs cpio archive based on the contents 518c2ecf20Sopenharmony_ci# specified by CONFIG_INITRAMFS_SOURCE. 528c2ecf20Sopenharmony_ciifeq ($(cpio-data),) 538c2ecf20Sopenharmony_ci 548c2ecf20Sopenharmony_cicpio-data := $(obj)/initramfs_data.cpio 558c2ecf20Sopenharmony_ci 568c2ecf20Sopenharmony_cihostprogs := gen_init_cpio 578c2ecf20Sopenharmony_ci 588c2ecf20Sopenharmony_ci# .initramfs_data.cpio.d is used to identify all files included 598c2ecf20Sopenharmony_ci# in initramfs and to detect if any files are added/removed. 608c2ecf20Sopenharmony_ci# Removed files are identified by directory timestamp being updated 618c2ecf20Sopenharmony_ci# The dependency list is generated by gen_initramfs.sh -l 628c2ecf20Sopenharmony_ci-include $(obj)/.initramfs_data.cpio.d 638c2ecf20Sopenharmony_ci 648c2ecf20Sopenharmony_ci# do not try to update files included in initramfs 658c2ecf20Sopenharmony_ci$(deps_initramfs): ; 668c2ecf20Sopenharmony_ci 678c2ecf20Sopenharmony_ciquiet_cmd_initfs = GEN $@ 688c2ecf20Sopenharmony_ci cmd_initfs = \ 698c2ecf20Sopenharmony_ci $(CONFIG_SHELL) $< -o $@ -l $(obj)/.initramfs_data.cpio.d \ 708c2ecf20Sopenharmony_ci $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ 718c2ecf20Sopenharmony_ci $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) \ 728c2ecf20Sopenharmony_ci $(ramfs-input) 738c2ecf20Sopenharmony_ci 748c2ecf20Sopenharmony_ci# We rebuild initramfs_data.cpio if: 758c2ecf20Sopenharmony_ci# 1) Any included file is newer than initramfs_data.cpio 768c2ecf20Sopenharmony_ci# 2) There are changes in which files are included (added or deleted) 778c2ecf20Sopenharmony_ci# 3) If gen_init_cpio are newer than initramfs_data.cpio 788c2ecf20Sopenharmony_ci# 4) Arguments to gen_initramfs.sh changes 798c2ecf20Sopenharmony_ci$(obj)/initramfs_data.cpio: $(src)/gen_initramfs.sh $(obj)/gen_init_cpio $(deps_initramfs) FORCE 808c2ecf20Sopenharmony_ci $(call if_changed,initfs) 818c2ecf20Sopenharmony_ci 828c2ecf20Sopenharmony_ciendif 838c2ecf20Sopenharmony_ci 848c2ecf20Sopenharmony_ci$(obj)/initramfs_inc_data: $(cpio-data) FORCE 858c2ecf20Sopenharmony_ci $(call if_changed,$(compress-y)) 868c2ecf20Sopenharmony_ci 878c2ecf20Sopenharmony_citargets += initramfs_data.cpio initramfs_inc_data 888c2ecf20Sopenharmony_ci 898c2ecf20Sopenharmony_cisubdir-$(CONFIG_UAPI_HEADER_TEST) += include 90