| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 1 | # |
| 2 | # kbuild file for usr/ - including initramfs image |
| 3 | # |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 5 | klibcdirs:; |
| Sam Ravnborg | 48f1f05 | 2006-07-23 19:37:44 +0200 | [diff] [blame] | 6 | PHONY += klibcdirs |
| 7 | |
| Nicholas Piggin | ae30ab4 | 2017-01-05 20:29:35 +1000 | [diff] [blame^] | 8 | suffix_y = $(subst $\",,$(CONFIG_INITRAMFS_COMPRESSION)) |
| Hendrik Brueckner | 6ae64e4 | 2010-09-17 15:24:09 -0700 | [diff] [blame] | 9 | AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)" |
| 10 | |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 11 | # Generate builtin.o based on initramfs_data.o |
| Hendrik Brueckner | 6ae64e4 | 2010-09-17 15:24:09 -0700 | [diff] [blame] | 12 | obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 14 | # initramfs_data.o contains the compressed initramfs_data.cpio image. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 15 | # The image is included using .incbin, a dependency which is not |
| 16 | # tracked automatically. |
| Hendrik Brueckner | 6ae64e4 | 2010-09-17 15:24:09 -0700 | [diff] [blame] | 17 | $(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 19 | ##### |
| 20 | # Generate the initramfs cpio archive |
| 21 | |
| 22 | hostprogs-y := gen_init_cpio |
| 23 | initramfs := $(CONFIG_SHELL) $(srctree)/scripts/gen_initramfs_list.sh |
| 24 | ramfs-input := $(if $(filter-out "",$(CONFIG_INITRAMFS_SOURCE)), \ |
| Thomas Chou | a26d79c | 2006-11-25 11:09:18 -0800 | [diff] [blame] | 25 | $(shell echo $(CONFIG_INITRAMFS_SOURCE)),-d) |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 26 | ramfs-args := \ |
| 27 | $(if $(CONFIG_INITRAMFS_ROOT_UID), -u $(CONFIG_INITRAMFS_ROOT_UID)) \ |
| Nickolay | ff54171 | 2006-06-09 21:24:14 +0400 | [diff] [blame] | 28 | $(if $(CONFIG_INITRAMFS_ROOT_GID), -g $(CONFIG_INITRAMFS_ROOT_GID)) |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 29 | |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 30 | # .initramfs_data.cpio.d is used to identify all files included |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 31 | # in initramfs and to detect if any files are added/removed. |
| 32 | # Removed files are identified by directory timestamp being updated |
| 33 | # The dependency list is generated by gen_initramfs.sh -l |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 34 | ifneq ($(wildcard $(obj)/.initramfs_data.cpio.d),) |
| 35 | include $(obj)/.initramfs_data.cpio.d |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | endif |
| 37 | |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 38 | quiet_cmd_initfs = GEN $@ |
| 39 | cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input) |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| P J P | 9ba4bcb | 2013-11-12 15:10:22 -0800 | [diff] [blame] | 41 | targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 \ |
| 42 | initramfs_data.cpio.lzma initramfs_data.cpio.xz \ |
| 43 | initramfs_data.cpio.lzo initramfs_data.cpio.lz4 \ |
| 44 | initramfs_data.cpio |
| Sam Ravnborg | 58a2f7d | 2006-08-07 20:58:28 +0200 | [diff] [blame] | 45 | # do not try to update files included in initramfs |
| 46 | $(deps_initramfs): ; |
| 47 | |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 48 | $(deps_initramfs): klibcdirs |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 49 | # We rebuild initramfs_data.cpio if: |
| 50 | # 1) Any included file is newer then initramfs_data.cpio |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 51 | # 2) There are changes in which files are included (added or deleted) |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 52 | # 3) If gen_init_cpio are newer than initramfs_data.cpio |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 53 | # 4) arguments to gen_initramfs.sh changes |
| Alain Knaff | a26ee60 | 2009-01-07 00:10:27 -0800 | [diff] [blame] | 54 | $(obj)/initramfs_data.cpio$(suffix_y): $(obj)/gen_init_cpio $(deps_initramfs) klibcdirs |
| 55 | $(Q)$(initramfs) -l $(ramfs-input) > $(obj)/.initramfs_data.cpio.d |
| Sam Ravnborg | d39a206b | 2006-04-11 13:24:32 +0200 | [diff] [blame] | 56 | $(call if_changed,initfs) |