ID_AA64MMFR2_BBM_SHIFT
#define ID_AA64MMFR2_BBM_MASK (UL(0xf) << ID_AA64MMFR2_BBM_SHIFT)
#define ID_AA64MMFR2_BBM_LEVEL0 (UL(0x0) << ID_AA64MMFR2_BBM_SHIFT)
#define ID_AA64MMFR2_BBM_LEVEL1 (UL(0x1) << ID_AA64MMFR2_BBM_SHIFT)
#define ID_AA64MMFR2_BBM_LEVEL2 (UL(0x2) << ID_AA64MMFR2_BBM_SHIFT)