2 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
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3 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * SPDX-License-Identifier: MIT
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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8 * this software and associated documentation files (the "Software"), to deal in
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9 * the Software without restriction, including without limitation the rights to
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10 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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11 * the Software, and to permit persons to whom the Software is furnished to do so,
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12 * subject to the following conditions:
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14 * The above copyright notice and this permission notice shall be included in all
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15 * copies or substantial portions of the Software.
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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19 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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20 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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21 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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24 * https://www.FreeRTOS.org
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25 * https://github.com/FreeRTOS
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29 #ifndef __PORT_ASM_H__
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30 #define __PORT_ASM_H__
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32 /* Scheduler includes. */
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33 #include "FreeRTOS.h"
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35 /* MPU wrappers includes. */
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36 #include "mpu_wrappers.h"
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39 * @brief Restore the context of the first task so that the first task starts
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42 void vRestoreContextOfFirstTask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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45 * @brief Checks whether or not the processor is privileged.
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47 * @return 1 if the processor is already privileged, 0 otherwise.
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49 BaseType_t xIsPrivileged( void ) __attribute__( ( naked ) );
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52 * @brief Raises the privilege level by clearing the bit 0 of the CONTROL
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55 * @note This is a privileged function and should only be called from the kenrel
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58 * Bit 0 of the CONTROL register defines the privilege level of Thread Mode.
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59 * Bit[0] = 0 --> The processor is running privileged
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60 * Bit[0] = 1 --> The processor is running unprivileged.
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62 void vRaisePrivilege( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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65 * @brief Lowers the privilege level by setting the bit 0 of the CONTROL
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68 * Bit 0 of the CONTROL register defines the privilege level of Thread Mode.
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69 * Bit[0] = 0 --> The processor is running privileged
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70 * Bit[0] = 1 --> The processor is running unprivileged.
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72 void vResetPrivilege( void ) __attribute__( ( naked ) );
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75 * @brief Starts the first task.
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77 void vStartFirstTask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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80 * @brief Disables interrupts.
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82 uint32_t ulSetInterruptMask( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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85 * @brief Enables interrupts.
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87 void vClearInterruptMask( uint32_t ulMask ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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90 * @brief PendSV Exception handler.
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92 void PendSV_Handler( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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95 * @brief SVC Handler.
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97 void SVC_Handler( void ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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100 * @brief Allocate a Secure context for the calling task.
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102 * @param[in] ulSecureStackSize The size of the stack to be allocated on the
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103 * secure side for the calling task.
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105 void vPortAllocateSecureContext( uint32_t ulSecureStackSize ) __attribute__( ( naked ) );
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108 * @brief Free the task's secure context.
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110 * @param[in] pulTCB Pointer to the Task Control Block (TCB) of the task.
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112 void vPortFreeSecureContext( uint32_t * pulTCB ) __attribute__( ( naked ) ) PRIVILEGED_FUNCTION;
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114 #endif /* __PORT_ASM_H__ */
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