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/******************************************************************************
* @file tz_context.h
* @brief Context Management for Armv8-M TrustZone
* @version V1.0.1
* @date 10. January 2018
******************************************************************************/
/*
* Copyright (c) 2017-2018 Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#if defined ( __ICCARM__ )
#pragma system_include /* treat file as system include file for MISRA check */
#elif defined (__clang__)
#pragma clang system_header /* treat file as system include file */
#endif
#ifndef TZ_CONTEXT_H
#define TZ_CONTEXT_H
#include <stdint.h>
#ifndef TZ_MODULEID_T
#define TZ_MODULEID_T
/// \details Data type that identifies secure software modules called by a process.
typedef uint32_t TZ_ModuleId_t;
#endif
/// \details TZ Memory ID identifies an allocated memory slot.
typedef uint32_t TZ_MemoryId_t;
/// Initialize secure context memory system
/// \return execution status (1: success, 0: error)
uint32_t TZ_InitContextSystem_S(void);
/// Allocate context memory for calling secure software modules in TrustZone
/// \param[in] module identifies software modules called from non-secure mode
/// \return value != 0 id TrustZone memory slot identifier
/// \return value 0 no memory available or internal error
TZ_MemoryId_t TZ_AllocModuleContext_S(TZ_ModuleId_t module);
/// Free context memory that was previously allocated with \ref TZ_AllocModuleContext_S
/// \param[in] id TrustZone memory slot identifier
/// \return execution status (1: success, 0: error)
uint32_t TZ_FreeModuleContext_S(TZ_MemoryId_t id);
/// Load secure context (called on RTOS thread context switch)
/// \param[in] id TrustZone memory slot identifier
/// \return execution status (1: success, 0: error)
uint32_t TZ_LoadContext_S(TZ_MemoryId_t id);
/// Store secure context (called on RTOS thread context switch)
/// \param[in] id TrustZone memory slot identifier
/// \return execution status (1: success, 0: error)
uint32_t TZ_StoreContext_S(TZ_MemoryId_t id);
#endif // TZ_CONTEXT_H
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