TTB_IRGN_WB        17 arch/arm/mm/proc-v7-2level.S #define TTB_IRGN_WB	((1 << 0) | (1 << 6))
TTB_IRGN_WB        15 arch/arm/mm/proc-v7-3level.S #define TTB_IRGN_WB	(3 << 8)