TTB_RGN_OC_WB      12 arch/arm/mm/proc-v7-2level.S #define TTB_RGN_OC_WB	(3 << 3)
TTB_RGN_OC_WB      19 arch/arm/mm/proc-v7-3level.S #define TTB_RGN_OC_WB	(3 << 10)