2 * FreeRTOS SMP Kernel V202110.00
3 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
6 * this software and associated documentation files (the "Software"), to deal in
7 * the Software without restriction, including without limitation the rights to
8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
9 * the Software, and to permit persons to whom the Software is furnished to do so,
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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22 * https://www.FreeRTOS.org
23 * https://github.com/FreeRTOS
28 #ifndef __PORT_ASM_H__
29 #define __PORT_ASM_H__
31 /* Scheduler includes. */
34 /* MPU wrappers includes. */
35 #include "mpu_wrappers.h"
38 * @brief Restore the context of the first task so that the first task starts
41 void vRestoreContextOfFirstTask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
44 * @brief Checks whether or not the processor is privileged.
46 * @return 1 if the processor is already privileged, 0 otherwise.
48 BaseType_t xIsPrivileged( void ) __attribute__( ( naked ) );
51 * @brief Raises the privilege level by clearing the bit 0 of the CONTROL
54 * @note This is a privileged function and should only be called from the kenrel
57 * Bit 0 of the CONTROL register defines the privilege level of Thread Mode.
58 * Bit[0] = 0 --> The processor is running privileged
59 * Bit[0] = 1 --> The processor is running unprivileged.
61 void vRaisePrivilege( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
64 * @brief Lowers the privilege level by setting the bit 0 of the CONTROL
67 * Bit 0 of the CONTROL register defines the privilege level of Thread Mode.
68 * Bit[0] = 0 --> The processor is running privileged
69 * Bit[0] = 1 --> The processor is running unprivileged.
71 void vResetPrivilege( void ) __attribute__( ( naked ) );
74 * @brief Starts the first task.
76 void vStartFirstTask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
79 * @brief Disables interrupts.
81 uint32_t ulSetInterruptMask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
84 * @brief Enables interrupts.
86 void vClearInterruptMask( uint32_t ulMask ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
89 * @brief PendSV Exception handler.
91 void PendSV_Handler( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
96 void SVC_Handler( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
99 * @brief Allocate a Secure context for the calling task.
101 * @param[in] ulSecureStackSize The size of the stack to be allocated on the
102 * secure side for the calling task.
104 void vPortAllocateSecureContext( uint32_t ulSecureStackSize ) __attribute__( ( naked ) );
107 * @brief Free the task's secure context.
109 * @param[in] pulTCB Pointer to the Task Control Block (TCB) of the task.
111 void vPortFreeSecureContext( uint32_t * pulTCB ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
113 #endif /* __PORT_ASM_H__ */