Marvell holds a full architecture license for the ARM instruction set, allowing it to design CPUs to implement the ARM instruction set, and not to just license a processor core designed by ARM holdings. E.g.
See also marvell.cesa
There seem to be some confusion regarding the Names “Sheeva” and “Feroceon”. One pdfs states: “The Marvell® 88F6192 SoC with SheevaTM embedded CPU technology, is a high-performance integrated controller for value class applications. It integrates the Marvell Sheeva CPU core which is fully ARMv5TE-compliant with a 256KB L2 Cache. The 88F6192 builds upon Marvell’s innovative Feroceon® family of processors.
VFP3-16= not supported by Debian
NEON= supported Debian
mvebur35058: mvebu: add inital support for Marvell Armada XP/370 SoCs
Boards based on the Marvell MV88 F6 1xx / MV88 F6 2xx SoCs.