Main support board of R-Car is Starter Kit (aka SK, ulcb) then AGL take care of Starter kit to build, test and submit patches.

R-Car salvator-x is limitation board. It is not community board, so AGL can't support it officially. However, many configuration is same and we can unify many things.

SOC_FAMILY name is
_ulcb : only use h3ulcb and m3ulcb
_salvator-x : for salvator (H3, M3)
_ebisu : for Ebisu board
_rcar-gen3 : for all R-Car SoC