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31419bfcee
FreeRTOS MPU: Add privileged execute never MPU attribute A new MPU region attribute Privileged eXecute Never (PXN) is introduced in Armv8.1-M architecture, where if an MPU region has PXN attribute set and the processor attempts to execute the code inside with privileged level, the Memory Management Fault exception would be triggered, with IACCVIOL bit in MemManage Fault State Register set to 1. The PXN feature allows privileged software to ensure specific application tasks (threads) to execute in unprivileged level only. Signed-off-by: Ahmed Ismail <Ahmed.Ismail@arm.com>
86 lines
2.9 KiB
C
86 lines
2.9 KiB
C
/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* SPDX-License-Identifier: MIT
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*
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*/
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#ifndef PORTMACRO_H
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#define PORTMACRO_H
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/* *INDENT-OFF* */
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* *INDENT-ON* */
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/*------------------------------------------------------------------------------
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* Port specific definitions.
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*
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* The settings in this file configure FreeRTOS correctly for the given hardware
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* and compiler.
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*
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* These settings should not be altered.
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*------------------------------------------------------------------------------
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*/
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/**
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* Architecture specifics.
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*/
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#define portARCH_NAME "Cortex-M23"
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#define portHAS_ARMV8M_MAIN_EXTENSION 0
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#define portARMV8M_MINOR_VERSION 0
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#define portDONT_DISCARD __attribute__( ( used ) )
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/*-----------------------------------------------------------*/
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/* ARMv8-M common port configurations. */
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#include "portmacrocommon.h"
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/*-----------------------------------------------------------*/
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#if ( configTOTAL_MPU_REGIONS == 16 )
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#error 16 MPU regions are not yet supported for this port.
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#endif
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#ifndef configENABLE_MVE
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#define configENABLE_MVE 0
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#elif( configENABLE_MVE != 0 )
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#error configENABLE_MVE must be left undefined, or defined to 0 for the Cortex-M23.
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#endif
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/*-----------------------------------------------------------*/
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/**
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* @brief Critical section management.
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*/
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#define portDISABLE_INTERRUPTS() __asm volatile ( " cpsid i " ::: "memory" )
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#define portENABLE_INTERRUPTS() __asm volatile ( " cpsie i " ::: "memory" )
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/*-----------------------------------------------------------*/
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/* *INDENT-OFF* */
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#ifdef __cplusplus
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}
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#endif
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/* *INDENT-ON* */
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#endif /* PORTMACRO_H */
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