According to /proc/cpuinfo, CPU Implementer is 0x56 ('V' = Marvell) and CPU part is 0x584 (Marvell Armada XP). This is most likely not Cortex A9 (which would have CPU Implementer == 0x41 and CPU part == 0xC09), but Marvell's own PJ4 microarchitecture.