ID_AA64MMFR1_XNX_SHIFT
#define ID_AA64MMFR1_XNX_MASK (UL(0xf) << ID_AA64MMFR1_XNX_SHIFT)
#define ID_AA64MMFR1_XNX_NONE (UL(0x0) << ID_AA64MMFR1_XNX_SHIFT)
#define ID_AA64MMFR1_XNX_IMPL (UL(0x1) << ID_AA64MMFR1_XNX_SHIFT)