
Specifies the type of kernel being downloaded. Some bootloaders, for example
U-Boot_, use this information to determine the load addresses and boot commands.
Certain :term:`device types <device type>` may also need the downloaded file to
be converted to a ``uImage``.

.. _`U-Boot`: http://www.denx.de/wiki/U-Boot

.. topic:: Supported types

 * ``image``
 * ``zimage``
 * ``uimage``

(Replaces the previous support for specifying the boot type (``bootm``,
``booti`` or ``bootz``).
