ID_AA64MMFR2_AT_SHIFT
#define ID_AA64MMFR2_AT_MASK (0xfULL << ID_AA64MMFR2_AT_SHIFT)
#define ID_AA64MMFR2_AT_NONE (0x0ULL << ID_AA64MMFR2_AT_SHIFT)
#define ID_AA64MMFR2_AT_IMPL (0x1ULL << ID_AA64MMFR2_AT_SHIFT)