This is an automated email from the ASF dual-hosted git repository.
xiaoxiang pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git
commit 6556d4e1234f1ec72b876522821274f6c81d962c
Author: Peter van der Perk <peter.vanderp...@nxp.com>
AuthorDate: Mon May 26 09:38:24 2025 +0200
arch/arm/imxrt: MPU reset on startup and TCM size fixes
On rt10xx chips the MPU didn't got reset, which is needed for use
with bootloaders. Furthermore the TCM sizes where fixed now we use
kconfig symbol to set the size respectively. Also we mark ITCM as
RO/RO so we can't change data we executed from.
---
arch/arm/src/imxrt/imxrt_mpuinit.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/arch/arm/src/imxrt/imxrt_mpuinit.c
b/arch/arm/src/imxrt/imxrt_mpuinit.c
index 584ef89da0..4f3ff3a2a3 100644
--- a/arch/arm/src/imxrt/imxrt_mpuinit.c
+++ b/arch/arm/src/imxrt/imxrt_mpuinit.c
@@ -270,6 +270,9 @@ void imxrt_mpu_initialize(void)
* No Subregion disable */
);
# else
+
+ mpu_reset();
+
mpu_configure_region(0xc0000000, 512 * 1024 * 1024,
MPU_RASR_TEX_DEV | /* Device
* Not Cacheable
@@ -294,15 +297,15 @@ void imxrt_mpu_initialize(void)
MPU_RASR_AP_RORO); /* P:RO U:RO
* Instruction access */
- mpu_configure_region(IMXRT_ITCM_BASE, 128 * 1024,
+ mpu_configure_region(IMXRT_ITCM_BASE, CONFIG_IMXRT_ITCM * 1024,
MPU_RASR_TEX_NOR | /* Normal */
RASR_C_VALUE | /* Cacheable */
RASR_B_VALUE | /* Bufferable
* Not Shareable */
- MPU_RASR_AP_RWRW); /* P:RW U:RW
+ MPU_RASR_AP_RORO); /* P:RO U:RO
* Instruction access */
- mpu_configure_region(IMXRT_DTCM_BASE, 128 * 1024,
+ mpu_configure_region(IMXRT_DTCM_BASE, CONFIG_IMXRT_DTCM * 1024,
MPU_RASR_TEX_NOR | /* Normal */
RASR_C_VALUE | /* Cacheable */
RASR_B_VALUE | /* Bufferable
