TTB_S              23 arch/arm/mm/proc-v6.S #define TTB_S		(1 << 1)
TTB_S               8 arch/arm/mm/proc-v7-2level.S #define TTB_S		(1 << 1)
TTB_S              20 arch/arm/mm/proc-v7-3level.S #define TTB_S		(3 << 12)