1 /* 2 * Copyright (C) 2019 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <stdint.h> 20 21 #define SMC_SERVICE_PORT "com.android.trusty.kernel.smc" 22 23 #define SMC_MSG_NUM_PARAMS 4 24 25 /* Return value for unknown SMC (defined by ARM DEN 0028E(1.4.0) */ 26 #define SM_ERR_UNDEFINED_SMC -1 27 28 /** 29 * struct smc_msg - request structure for SMC 30 * @params: parameters of smc call 31 */ 32 struct smc_msg { 33 uint64_t params[SMC_MSG_NUM_PARAMS]; 34 }; 35 36 /** 37 * struct smc_response - response structure for SMC 38 * @msg: values returned by smcall iff call was allowed by smc access policy. 39 * @rc: status code. If non-zero, @msg may contain additional diagnostic info. 40 */ 41 struct __attribute__((__packed__)) smc_response { 42 struct smc_msg msg; 43 int32_t rc; 44 }; 45