rt-thread.git/libcpu/arm/cortex-m4/mpu.h, branch master Unnamed repository; edit this file 'description' to name the repository. http://cgit.235523.xyz/rt-thread.git/atom/libcpu/arm/cortex-m4/mpu.h?h=master 2026-09-01T01:39:10Z fix[arm][cortex-m4]: clarify MPU permission expressions 2026-09-01T01:39:10Z wdfk-prog 1425075683@qq.com 2026-08-29T02:24:53Z urn:sha1:ef413759d4f20435fa7d0471e9be7b867566cc59 [arm][cortex-m4] Add hardware stack guard support 2026-08-26T02:37:02Z hanzhijian hanzhijian@zepp.com 2026-08-25T01:19:51Z urn:sha1:e2e6245aace07b545b8dbcef8fbcdb4469f55d9f Enable RT_USING_HW_STACK_GUARD on Cortex-M4, which was previously only available on Cortex-M7 and Cortex-M33. Core porting (libcpu/arm/cortex-m4/): - Add mpu.c/mpu.h/mputype.h aligned with the Cortex-M7 MPU layer. The only difference is the default memory type attribute: Cortex-M4 has no L1 cache, so the cacheability bits are reduced to three cases. - Add rt_hw_stack_guard_init() to cpuport.c. - Add missing #include <rtconfig.h> to context_gcc.S and invoke rt_hw_mpu_table_switch() in the PendSV context switch path. - Update SConscript to exclude mpu.c when memory protection is disabled. BSP reference (bsp/stm32/stm32f407-fk407m2-zgt6/): - board.h: include rtthread.h and define NUM_STATIC_REGIONS. - board.c: define static_regions[] marking the Flash region read-only, guarded by RT_USING_MEM_PROTECTION so it is not enabled by default.