2 * Copyright (c) 2017-2023 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.
20 * CMSIS Core(M) Context Management for Armv8-M TrustZone
23 #if defined ( __ICCARM__ )
24 #pragma system_include /* treat file as system include file for MISRA check */
25 #elif defined (__clang__)
26 #pragma clang system_header /* treat file as system include file */
36 /// \details Data type that identifies secure software modules called by a process.
37 typedef uint32_t TZ_ModuleId_t;
40 /// \details TZ Memory ID identifies an allocated memory slot.
41 typedef uint32_t TZ_MemoryId_t;
43 /// Initialize secure context memory system
44 /// \return execution status (1: success, 0: error)
45 uint32_t TZ_InitContextSystem_S (void);
47 /// Allocate context memory for calling secure software modules in TrustZone
48 /// \param[in] module identifies software modules called from non-secure mode
49 /// \return value != 0 id TrustZone memory slot identifier
50 /// \return value 0 no memory available or internal error
51 TZ_MemoryId_t TZ_AllocModuleContext_S (TZ_ModuleId_t module);
53 /// Free context memory that was previously allocated with \ref TZ_AllocModuleContext_S
54 /// \param[in] id TrustZone memory slot identifier
55 /// \return execution status (1: success, 0: error)
56 uint32_t TZ_FreeModuleContext_S (TZ_MemoryId_t id);
58 /// Load secure context (called on RTOS thread context switch)
59 /// \param[in] id TrustZone memory slot identifier
60 /// \return execution status (1: success, 0: error)
61 uint32_t TZ_LoadContext_S (TZ_MemoryId_t id);
63 /// Store secure context (called on RTOS thread context switch)
64 /// \param[in] id TrustZone memory slot identifier
65 /// \return execution status (1: success, 0: error)
66 uint32_t TZ_StoreContext_S (TZ_MemoryId_t id);
68 #endif // TZ_CONTEXT_H