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armv8-m: Fix MPU Region Limit Address config

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On armv8-m the MPU region limits are inclusive.  Thus, we must substract
one byte of size from (base + limit).

Signed-off-by: Michael Jung <michael.jung@secore.ly>
This commit is contained in:
Michael Jung
2022-10-20 12:55:42 +02:00
committed by Alan Carvalho de Assis
parent d4cbb4f5b8
commit ec3805721c
1 changed files with 1 additions and 1 deletions
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arch/arm/src/armv8-m/arm_mpu.c
+1 -1
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@@ -163,7 +163,7 @@ void mpu_configure_region(uintptr_t base, size_t size,
* aligns with the size of the selected region." * aligns with the size of the selected region."
*/ */
limit = (base + size) & MPU_RLAR_LIMIT_MASK; limit = (base + size - 1) & MPU_RLAR_LIMIT_MASK;
base &= MPU_RBAR_BASE_MASK; base &= MPU_RBAR_BASE_MASK;
/* Select the region */ /* Select the region */