2 * Copyright (c) 2015-2016 ARM Limited. All rights reserved.
4 * SPDX-License-Identifier: Apache-2.0
6 * Licensed under the Apache License, Version 2.0 (the License); you may
7 * not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
14 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * ----------------------------------------------------------------------------
20 * $Date: 21. September 2016
23 * Project: TrustZone for ARMv8-M
24 * Title: Context Management for ARMv8-M TrustZone
28 *---------------------------------------------------------------------------*/
37 /// \details Data type that identifies secure software modules called by a process.
38 typedef uint32_t TZ_ModuleId_t;
41 /// \details TZ Memory ID identifies an allocated memory slot.
42 typedef uint32_t TZ_MemoryId_t;
44 /// Initialize secure context memory system
45 /// \return execution status (1: success, 0: error)
46 uint32_t TZ_InitContextSystem_S (void);
48 /// Allocate context memory for calling secure software modules in TrustZone
49 /// \param[in] module identifies software modules called from non-secure mode
50 /// \return value != 0 id TrustZone memory slot identifier
51 /// \return value 0 no memory available or internal error
52 TZ_MemoryId_t TZ_AllocModuleContext_S (TZ_ModuleId_t module);
54 /// Free context memory that was previously allocated with \ref TZ_AllocModuleContext_S
55 /// \param[in] id TrustZone memory slot identifier
56 /// \return execution status (1: success, 0: error)
57 uint32_t TZ_FreeModuleContext_S (TZ_MemoryId_t id);
59 /// Load secure context (called on RTOS thread context switch)
60 /// \param[in] id TrustZone memory slot identifier
61 /// \return execution status (1: success, 0: error)
62 uint32_t TZ_LoadContext_S (TZ_MemoryId_t id);
64 /// Store secure context (called on RTOS thread context switch)
65 /// \param[in] id TrustZone memory slot identifier
66 /// \return execution status (1: success, 0: error)
67 uint32_t TZ_StoreContext_S (TZ_MemoryId_t id);
69 #endif // TZ_CONTEXT_H