ID_AA64PFR0_EL0_SHIFT
#define ID_AA64PFR0_EL0_MASK (0xf << ID_AA64PFR0_EL0_SHIFT)
#define ID_AA64PFR0_EL0_64 (1 << ID_AA64PFR0_EL0_SHIFT)
#define ID_AA64PFR0_EL0_64_32 (2 << ID_AA64PFR0_EL0_SHIFT)