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Fix the context array size for MPU ports

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Ensure the saved context location falls within the reserved context area
rather than overlapping with the next MPU_SETTINGS structure member.

This never caused a problem because actual read/write operations
start from one word before the saved context location.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav Aggarwal 2025-01-23 18:47:43 +05:30
parent 72bb476bf3
commit 1c2f2145aa
25 changed files with 206 additions and 171 deletions
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11
portable/GCC/ARM_CM4_MPU/portmacro.h
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@ -219,7 +219,16 @@ typedef struct MPU_REGION_SETTINGS
#endif /* configUSE_MPU_WRAPPERS_V1 == 0 */
#define MAX_CONTEXT_SIZE ( 52 )
/*
* +---------+---------------+-----------------+-----------------+-----+
* | s16-s31 | s0-s15, FPSCR | CONTROL, r4-r11 | PSP, r0-r3, r12 | |
* | | | EXC_RETURN | LR, PC, xPSR | |
* +---------+---------------+-----------------+-----------------+-----+
*
* <--------><---------------><----------------><----------------><---->
* 16 17 10 9 1
*/
#define MAX_CONTEXT_SIZE ( 53 )
/* Size of an Access Control List (ACL) entry in bits. */
#define portACL_ENTRY_SIZE_BITS ( 32U )