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FreeRTOS MPU: Add Privileged eXecute Never MPU attribute support (#1092)

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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>
This commit is contained in:
Ahmed Ismail 2024-06-19 16:12:50 +01:00 • committed by GitHub
parent 0c79e74eaa
commit 31419bfcee
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56 changed files with 1309 additions and 936 deletions
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27
include/task.h
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@ -53,30 +53,33 @@
* The tskKERNEL_VERSION_MAJOR, tskKERNEL_VERSION_MINOR, tskKERNEL_VERSION_BUILD
* values will reflect the last released version number.
*/
#define tskKERNEL_VERSION_NUMBER "V11.1.0+"
#define tskKERNEL_VERSION_MAJOR 11
#define tskKERNEL_VERSION_MINOR 1
#define tskKERNEL_VERSION_BUILD 0
#define tskKERNEL_VERSION_NUMBER "V11.1.0+"
#define tskKERNEL_VERSION_MAJOR 11
#define tskKERNEL_VERSION_MINOR 1
#define tskKERNEL_VERSION_BUILD 0
/* MPU region parameters passed in ulParameters
* of MemoryRegion_t struct. */
#define tskMPU_REGION_READ_ONLY ( 1U << 0U )
#define tskMPU_REGION_READ_WRITE ( 1U << 1U )
#define tskMPU_REGION_EXECUTE_NEVER ( 1U << 2U )
#define tskMPU_REGION_NORMAL_MEMORY ( 1U << 3U )
#define tskMPU_REGION_DEVICE_MEMORY ( 1U << 4U )
#define tskMPU_REGION_READ_ONLY ( 1U << 0U )
#define tskMPU_REGION_READ_WRITE ( 1U << 1U )
#define tskMPU_REGION_EXECUTE_NEVER ( 1U << 2U )
#define tskMPU_REGION_NORMAL_MEMORY ( 1U << 3U )
#define tskMPU_REGION_DEVICE_MEMORY ( 1U << 4U )
#if ( portARMV8M_MINOR_VERSION >= 1 )
#define tskMPU_REGION_PRIVILEGED_EXECUTE_NEVER ( 1U << 5U )
#endif /* portARMV8M_MINOR_VERSION >= 1 */
/* MPU region permissions stored in MPU settings to
* authorize access requests. */
#define tskMPU_READ_PERMISSION ( 1U << 0U )
#define tskMPU_WRITE_PERMISSION ( 1U << 1U )
#define tskMPU_READ_PERMISSION ( 1U << 0U )
#define tskMPU_WRITE_PERMISSION ( 1U << 1U )
/* The direct to task notification feature used to have only a single notification
* per task. Now there is an array of notifications per task that is dimensioned by
* configTASK_NOTIFICATION_ARRAY_ENTRIES. For backward compatibility, any use of the
* original direct to task notification defaults to using the first index in the
* array. */
#define tskDEFAULT_INDEX_TO_NOTIFY ( 0 )
#define tskDEFAULT_INDEX_TO_NOTIFY ( 0 )
/**
* task. h