[rt-smart] testcase & improvements for memory management (#7099)

* [utest/mm] add testcase for create/init
format codes of create/init in components/mm

* [libcpu/aarch64] fix user stack check routine

* [kservice] export API for utest

* [utest/mm] testcase for aspace_map
format & modify the files under components/mm related with aspace_map

* [lwp/user_mm] add user_map_varea for mmap feature

* [mm] rename rt_mm_fault_try_fix to rt_aspace_fault_try_fix

* [utest/mm] testcase for synchronization

* [mm] modify unmap api to improve throughput

* [utest/mm] testcases for cache and varea map

* [format] remove extra space

* [utest/mm] fix testcase problem in header

* [lwp] extend map_user_varea with a flag

* [utest/mm] testcase for lwp_map_user_varea

* [libcpu/arm/cortex-a] fix kernel space layout

* [utest/mm] adjust for armv7 arch

src/kservice.c

@@ -1568,6 +1568,12 @@ rt_inline void _heap_unlock(rt_base_t level)
 #endif
 }
 
+#ifdef RT_USING_UTESTCASES
+/* export to utest to observe the inner statements */
+rt_base_t rt_heap_lock(void) __attribute__((alias("_heap_lock")));
+void rt_heap_unlock(rt_base_t level) __attribute__((alias("_heap_unlock")));
+#endif
+
 #if defined(RT_USING_SMALL_MEM_AS_HEAP)
 static rt_smem_t system_heap;
 rt_inline void _smem_info(rt_size_t *total,