+ mkfs.fat -C $@.boot $$(( $(CONFIG_TARGET_KERNEL_PARTSIZE) * 1024 ))
+ $(foreach dts,$(DEVICE_DTS), mcopy -i $@.boot $(KDIR)/image-$(dts).dtb ::$(dts).dtb;)
+ mcopy -i $@.boot $(IMAGE_KERNEL) ::$(KERNEL_NAME)
+ -mcopy -i $@.boot $@-boot.scr ::boot.scr
+endef
+
+define Build/boot-img-ext4
+ rm -fR $@.boot
+ mkdir -p $@.boot
+ $(foreach dts,$(DEVICE_DTS), $(CP) $(KDIR)/image-$(dts).dtb $@.boot/$(dts).dtb;)
+ $(CP) $(IMAGE_KERNEL) $@.boot/$(KERNEL_NAME)
+ -$(CP) $@-boot.scr $@.boot/boot.scr
+ make_ext4fs -J -L kernel -l $(CONFIG_TARGET_KERNEL_PARTSIZE)M \
+ $(if $(SOURCE_DATE_EPOCH),-T $(SOURCE_DATE_EPOCH)) \
+ $@.bootimg $@.boot
+endef
+
+define Build/buffalo-kernel-jffs2
+ rm -rf $(KDIR)/kernel_jffs2 $@.fakerd
+ mkdir -p $(KDIR)/kernel_jffs2
+ dd if=/dev/zero of=$@.fakerd bs=131008 count=1 conv=sync
+ $(STAGING_DIR_HOST)/bin/mkimage \
+ -T ramdisk -A $(LINUX_KARCH) -O linux -C gzip -n 'fake initrd' \
+ -d $@.fakerd $(KDIR)/kernel_jffs2/initrd.buffalo
+ cp $@ $(KDIR)/kernel_jffs2/uImage.buffalo
+ $(STAGING_DIR_HOST)/bin/mkfs.jffs2 \
+ --little-endian -v --squash-uids -q -f -n -x lzma -x rtime -m none \
+ --eraseblock=128KiB --pad=$(KERNEL_SIZE) -d $(KDIR)/kernel_jffs2 -o $@
+ rm -rf $(KDIR)/kernel_jffs2 $@.fakerd
+endef
+
+define Build/buffalo-kernel-ubifs
+ rm -rf $@-ubidir
+ mkdir -p $@-ubidir
+ mv $@ $@-ubidir/uImage.buffalo
+ touch $@
+ $(call Build/append-uImage-fakehdr, ramdisk)
+ mv $@ $@-ubidir/initrd.buffalo
+ $(STAGING_DIR_HOST)/bin/mkfs.ubifs $(KERNEL_UBIFS_OPTS) -r $@-ubidir $@
+endef
+
+# Some info about Ctera firmware:
+# 1. It's simple tar file (GNU standard), but it must have ".firm" suffix.
+# 2. It contains two images: kernel and romdisk. Both are required.
+# 3. Every image has header and trailer file.
+# 4. The struct of tar firmware is: header kernel trailer header romdisk trailer
+# 5. In header file are some strings used to describe image. It was decoded from
+# factory image.
+# 6. Version format in header file is restricted by Original FW.
+# 7. Trailer file contains MD5 sum string of header and image file.
+# 8. Firmware file must have <=24MB size.
+
+define Build/ctera-firmware
+ mkdir -p $@.tmp
+
+ # Prepare header and trailer file for kernel
+ echo "# CTera firmware information file" > $@.tmp/header
+ echo "image_type=kernel" >> $@.tmp/header
+ echo "arch=ARM" >> $@.tmp/header
+ echo "board=2Drive_A" >> $@.tmp/header
+ echo "version=5.5.165.61499" >> $@.tmp/header
+ echo "kernel_cmd=console=ttyS0,115200 earlycon" >> $@.tmp/header
+ echo "date=$$(date $(if $(SOURCE_DATE_EPOCH),-d@$(SOURCE_DATE_EPOCH)))" \
+ >> $@.tmp/header
+
+ cp $@ $@.tmp/kernel
+
+ echo "MD5=$$(cat $@.tmp/header $@.tmp/kernel | $(MKHASH) md5)" \
+ > $@.tmp/trailer
+
+ tar $(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
+ -H gnu -C $@.tmp -cf $@.tar header kernel trailer
+
+ # Prepare header and trailer file for fake romdisk
+ echo "# CTera firmware information file" > $@.tmp/header
+ echo "image_type=romdisk" >> $@.tmp/header
+ echo "initrd=yes" >> $@.tmp/header
+ echo "arch=ARM" >> $@.tmp/header
+ echo "board=2Drive_A" >> $@.tmp/header
+ echo "version=5.5.165.61499" >> $@.tmp/header
+ echo "date=$$(date $(if $(SOURCE_DATE_EPOCH),-d@$(SOURCE_DATE_EPOCH)))" \
+ >> $@.tmp/header
+
+ rm -f $@
+ touch $@
+ $(call Build/append-uImage-fakehdr, ramdisk)
+ cp $@ $@.tmp/romdisk
+
+ echo "MD5=$$(cat $@.tmp/header $@.tmp/romdisk | $(MKHASH) md5)" \
+ > $@.tmp/trailer
+
+ tar $(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
+ -H gnu -C $@.tmp -rf $@.tar header romdisk trailer
+
+ mv $@.tar $@
+ rm -rf $@.tmp