ID_AA64PFR0_EL1_SHIFT
#define ID_AA64PFR0_EL1_MASK (0xf << ID_AA64PFR0_EL1_SHIFT)
#define ID_AA64PFR0_EL1_64 (1 << ID_AA64PFR0_EL1_SHIFT)
#define ID_AA64PFR0_EL1_64_32 (2 << ID_AA64PFR0_EL1_SHIFT)