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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright (c) 2021, Arm Limited and Contributors. All rights reserved.
*/
#ifndef LIBSP_INCLUDE_SP_MESSAGING_H_
#define LIBSP_INCLUDE_SP_MESSAGING_H_
#include "sp_api_defines.h"
#include "sp_api_types.h"
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define SP_MSG_ARG_COUNT (4)
/**
* @brief SP message type
*/
struct sp_msg {
uint16_t source_id;
uint16_t destination_id;
uint32_t args[SP_MSG_ARG_COUNT];
};
/**
* @brief Wait for a message and returns it.
* @param[out] msg The received message
*
* @return The SP API result
*/
sp_result sp_msg_wait(struct sp_msg *msg);
/**
* @brief Sends a request message and waits for the response message
* which it returns then.
*
* @param[in] req The request message
* @param[out] resp The response message
*
* @return The SP API result
*/
sp_result sp_msg_send_direct_req(const struct sp_msg *req, struct sp_msg *resp);
/**
* @brief Sends a response message and waits for a new request which it
* returns then.
*
* @param[in] resp The response message
* @param[out] req The request message
*
* @return The SP API result
*/
sp_result sp_msg_send_direct_resp(const struct sp_msg *resp,
struct sp_msg *req);
#ifdef __cplusplus
}
#endif
#endif /* LIBSP_INCLUDE_SP_MESSAGING_H_ */
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