• Paul Burton's avatar
    cmd_ubi: add write.part command, to write a volume in multiple parts · cc734f5a
    Paul Burton authored
    This allows you to write data to an UBI volume when the amount of memory
    available to write that data from is less than the total size of the
    data. For example, you may split a root filesystem UBIFS image into
    parts, provide the total size of the image to the first write.part
    command and then use multiple write.part commands to write the
    subsequent parts of the volume. This results in a sequence of commands
    akin to:
    
      ext4load mmc 0:1 0x80000000 rootfs.ubifs.0
      ubi write.part 0x80000000 root 0x08000000 0x18000000
      ext4load mmc 0:1 0x80000000 rootfs.ubifs.1
      ubi write.part 0x80000000 root 0x08000000
      ext4load mmc 0:1 0x80000000 rootfs.ubifs.2
      ubi write.part 0x80000000 root 0x08000000
    
    This would write 384MiB of data to the UBI volume 'root' whilst only
    requiring 128MiB of said data to be held in memory at a time.
    Signed-off-by: default avatarPaul Burton <paul.burton@imgtec.com>
    Acked-by: default avatarStefan Roese <sr@denx.de>
    cc734f5a
README.ubi 6.55 KB