arm: core: mpu: Add Allow write on Flash
This patch adds the allow flash write CONFIG option to the ARM MPU configuration in privileged mode. Signed-off-by: Vincenzo Frascino <vincenzo.frascino@linaro.org> Signed-off-by: Michael Scott <michael.scott@linaro.org> Signed-off-by: David Brown <david.brown@linaro.org>
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2 changed files with 7 additions and 1 deletions
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@ -41,7 +41,7 @@ config NXP_MPU
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config MPU_ALLOW_FLASH_WRITE
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bool "Add MPU access to write to flash"
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depends on NXP_MPU
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depends on ARM_MPU || NXP_MPU
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default n
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help
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Enable this to allow MPU RWX access to flash memory
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@ -89,8 +89,14 @@ struct arm_mpu {
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#define REGION_RAM_ATTR(size) \
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(NORMAL_OUTER_INNER_NON_CACHEABLE_NON_SHAREABLE | \
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NOT_EXEC | size | FULL_ACCESS)
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#if defined(CONFIG_MPU_ALLOW_FLASH_WRITE)
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#define REGION_FLASH_ATTR(size) \
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(NORMAL_OUTER_INNER_NON_CACHEABLE_NON_SHAREABLE | size | \
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P_RW_U_RO)
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#else
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#define REGION_FLASH_ATTR(size) \
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(NORMAL_OUTER_INNER_NON_CACHEABLE_NON_SHAREABLE | size | RO)
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#endif
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#define REGION_PPB_ATTR(size) (STRONGLY_ORDERED_SHAREABLE | size | FULL_ACCESS)
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#define REGION_IO_ATTR(size) (DEVICE_NON_SHAREABLE | size | FULL_ACCESS)
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