2 * FreeRTOS Kernel V10.4.3
3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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22 * https://www.FreeRTOS.org
23 * https://github.com/FreeRTOS
28 #ifndef __SECURE_CONTEXT_H__
29 #define __SECURE_CONTEXT_H__
31 /* Standard includes. */
34 /* FreeRTOS includes. */
35 #include "FreeRTOSConfig.h"
38 * @brief PSP value when no task's context is loaded.
40 #define securecontextNO_STACK 0x0
43 * @brief Opaque handle.
46 typedef struct SecureContext * SecureContextHandle_t;
47 /*-----------------------------------------------------------*/
50 * @brief Initializes the secure context management system.
52 * PSP is set to NULL and therefore a task must allocate and load a context
53 * before calling any secure side function in the thread mode.
55 * @note This function must be called in the handler mode. It is no-op if called
58 void SecureContext_Init( void );
61 * @brief Allocates a context on the secure side.
63 * @note This function must be called in the handler mode. It is no-op if called
66 * @param[in] ulSecureStackSize Size of the stack to allocate on secure side.
67 * @param[in] ulIsTaskPrivileged 1 if the calling task is privileged, 0 otherwise.
69 * @return Opaque context handle if context is successfully allocated, NULL
72 #if ( configENABLE_MPU == 1 )
73 SecureContextHandle_t SecureContext_AllocateContext( uint32_t ulSecureStackSize,
74 uint32_t ulIsTaskPrivileged );
75 #else /* configENABLE_MPU */
76 SecureContextHandle_t SecureContext_AllocateContext( uint32_t ulSecureStackSize );
77 #endif /* configENABLE_MPU */
80 * @brief Frees the given context.
82 * @note This function must be called in the handler mode. It is no-op if called
85 * @param[in] xSecureContextHandle Context handle corresponding to the
86 * context to be freed.
88 void SecureContext_FreeContext( SecureContextHandle_t xSecureContextHandle );
91 * @brief Loads the given context.
93 * @note This function must be called in the handler mode. It is no-op if called
96 * @param[in] xSecureContextHandle Context handle corresponding to the context
99 void SecureContext_LoadContext( SecureContextHandle_t xSecureContextHandle );
102 * @brief Saves the given context.
104 * @note This function must be called in the handler mode. It is no-op if called
105 * in the thread mode.
107 * @param[in] xSecureContextHandle Context handle corresponding to the context
110 void SecureContext_SaveContext( SecureContextHandle_t xSecureContextHandle );
112 #endif /* __SECURE_CONTEXT_H__ */