Since devices that can't DMA above 4GiB will misbehave with this option
enabled add a warning on the documentation.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Tested-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Move this section of the README into doc/ with some minor updates to
mention SPL and user lower-case hex.
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>