RTAS_FN_GET_TIME_OF_DAY
int error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret);
error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret);
error = rtas_call(rtas_function_token(RTAS_FN_GET_TIME_OF_DAY), 0, 8, ret);
if (rtas_function_token(RTAS_FN_GET_TIME_OF_DAY) != RTAS_UNKNOWN_SERVICE) {