* ! Behavior change !
Old behavior: If the Reset button is held down during power-on
do factory reset and try booting recovery from TFTP forever.
If valid recovery is received via TFTP, write it to flash and boot.
New behavior: If the Reset button is held down during power-on
do factory reset, then try TFTP *once*, then try booting on-flash
recovery, then keep trying via TFTP forever until a valid image is
received.
Only if there is no bootable recovery stored on flash, store the
downloaded recovery. Then boot it.
* Set loadaddr to 0x48000000 in order to allow booting images larger
than ~47MB (reported by Oskari Lemmelä). Setting loadaddr to
0x48000000 gives us 384MB on devices with 512MB RAM, which should be
more than enough as a maximum size for uImage.FIT to be loaded.
* Widely unify device-specific default environment in preparation to
auto-generate it from parameters.
* backport upstream commit fixing MBR/DOS partitioning
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
349e2b7e65