target/linux/apm821xx/image/Makefile

   1 # SPDX-License-Identifier: GPL-2.0-only
   2
   3 include $(TOPDIR)/rules.mk
   4 include $(INCLUDE_DIR)/image.mk
   5
   6 DEVICE_VARS += DTB_SIZE
   7
   8 define Build/boot-img
   9         $(RM) -rf $@.bootdir
  10         mkdir -p $@.bootdir/boot
  11
  12         $(CP) $@.scr $@.bootdir/boot/boot.scr
  13         $(CP) $(IMAGE_KERNEL).dtb $@.bootdir/boot/$(DEVICE_DTB)
  14         $(CP) $(IMAGE_KERNEL) $@.bootdir/boot/uImage
  15
  16         genext2fs --block-size $(BLOCKSIZE:%k=%Ki) \
  17                 --size-in-blocks $$((1024 * $(CONFIG_TARGET_KERNEL_PARTSIZE))) \
  18                 --root $@.bootdir $@.boot
  19
  20         # convert it to revision 1 - needed for u-boot ext2load
  21         $(STAGING_DIR_HOST)/bin/tune2fs -O filetype $@.boot
  22         $(STAGING_DIR_HOST)/bin/e2fsck -pDf $@.boot > /dev/null
  23 endef
  24
  25 define Build/boot-script
  26         $(STAGING_DIR_HOST)/bin/mkimage -A powerpc -T script -C none -n "$(PROFILE) Boot Script" \
  27                 -d mbl_boot.scr \
  28                 $@.scr
  29 endef
  30
  31 define Build/copy-file
  32         cat "$(1)" > "$@"
  33 endef
  34
  35 define Build/dtb
  36         $(call Image/BuildDTB,../dts/$(DEVICE_DTS).dts,$@.dtb,,--space $(DTB_SIZE))
  37 endef
  38
  39 define Build/export-dtb
  40         cp $(IMAGE_KERNEL).dtb $@
  41 endef
  42
  43 define Build/MuImage-initramfs
  44         rm -rf $@.fakerd $@.new
  45
  46         dd if=/dev/zero of=$@.fakerd bs=32 count=1 conv=sync
  47
  48         # Netgear used an old uboot that doesn't have FIT support.
  49         # So we are stuck with either a full ext2/4 fs in a initrd.
  50         # ... or we try to make the "multi" image approach to work
  51         # for us.
  52         #
  53         # Sadly, the "multi" image has to consists of three
  54         # "fixed" parts in the following "fixed" order:
  55         # 1. The kernel which is in $@
  56         # 2. The (fake) initrd which is in $@.fakerd
  57         # 3. The device tree binary which is in $@.dtb
  58         #
  59         # Now, given that we use the function for the kernel which
  60         # already has a initramfs image inside, we still have to
  61         # add a "fake" initrd (which a mkimage header) in the second
  62         # part of the legacy multi image. Since we need to put the
  63         # device tree stuff into part 3.
  64
  65         -$(STAGING_DIR_HOST)/bin/mkimage -A $(LINUX_KARCH) -O linux -T multi \
  66                 -C $(1) -a $(KERNEL_LOADADDR) -e $(KERNEL_ENTRY) \
  67                 -n '$(BOARD_NAME) initramfs' -d $@:$@.fakerd:$@.dtb $@.new
  68         mv $@.new $@
  69         rm -rf $@.fakerd
  70 endef
  71
  72 define Build/prepend-dtb
  73         cat "$@.dtb.uimage" "$@" > "$@.new"
  74         mv "$@.new" "$@"
  75 endef
  76
  77 define Image/cpiogz
  78         ( cd $(TARGET_DIR); find . | cpio -o -H newc | gzip -9n >$(KDIR_TMP)/$(IMG_PREFIX)-rootfs.cpio.gz )
  79 endef
  80
  81 define Device/Default
  82   PROFILES := Default
  83   KERNEL_DEPENDS = $$(wildcard ../dts/$$(DEVICE_DTS).dts)
  84   DEVICE_DTS :=
  85   KERNEL_ENTRY := 0x00000000
  86   KERNEL_LOADADDR := 0x00000000
  87   DEVICE_DTS_DIR := ../dts
  88   DEVICE_DTS = $(subst _,-,$(1))
  89 endef
  90
  91 include $(SUBTARGET).mk
  92
  93 $(eval $(call BuildImage))