SMCCC_VERSION
features = psci_features(SMCCC_VERSION);
ret = psci_call(SMCCC_VERSION, 0, 0, 0);
if (psci_features(SMCCC_VERSION) == PSCI_RETVAL_NOT_SUPPORTED ||
(version = arm_smccc_invoke(SMCCC_VERSION, NULL)) <= 0) {