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/*
* Copyright (c) 2015-2016 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.
*
* ----------------------------------------------------------------------------
*
* $Date: 21. September 2016
* $Revision: V1.0
*
* Project: TrustZone for ARMv8-M
* Title: Context Management for ARMv8-M TrustZone
*
* Version 1.0
* Initial Release
*---------------------------------------------------------------------------*/
#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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