[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

14 files changed, 1329 insertions, 0 deletions

diff --git a/examples/utest/testcases/Kconfig b/examples/utest/testcases/Kconfig
index 2e1c087ef5..d81216f5b4 100644
--- a/examples/utest/testcases/Kconfig
+++ b/examples/utest/testcases/Kconfig
@@ -12,6 +12,7 @@ source "$RTT_DIR/examples/utest/testcases/kernel/Kconfig"
 source "$RTT_DIR/examples/utest/testcases/cpp11/Kconfig"
 source "$RTT_DIR/examples/utest/testcases/drivers/serial_v2/Kconfig"
 source "$RTT_DIR/examples/utest/testcases/posix/Kconfig"
+source "$RTT_DIR/examples/utest/testcases/mm/Kconfig"
 
 endif
 
diff --git a/examples/utest/testcases/mm/Kconfig b/examples/utest/testcases/mm/Kconfig
new file mode 100644
index 0000000000..b1c74e14d5
--- /dev/null
+++ b/examples/utest/testcases/mm/Kconfig
@@ -0,0 +1,17 @@
+menu "Memory Management Subsytem Testcase"
+
+    config UTEST_MM_API_TC
+    bool "Enable Utest for MM API"
+    default n
+    help
+        The test covers the Memory Management APIs under the
+        `components/mm` and `libcpu/[mmu.*|tlb.*|cache.*]`
+
+    config UTEST_MM_LWP_TC
+    bool "Enable Utest for MM API in lwp"
+    default n
+    help
+        The test covers the Memory Management APIs under the
+        `components/lwp`.
+
+endmenu
diff --git a/examples/utest/testcases/mm/SConscript b/examples/utest/testcases/mm/SConscript
new file mode 100644
index 0000000000..876e5cab2c
--- /dev/null
+++ b/examples/utest/testcases/mm/SConscript
@@ -0,0 +1,16 @@
+Import('rtconfig')
+from building import *
+
+cwd     = GetCurrentDir()
+src     = []
+CPPPATH = [cwd]
+
+if GetDepend(['UTEST_MM_API_TC']):
+    src += ['mm_api_tc.c', 'mm_libcpu_tc.c']
+
+if GetDepend(['UTEST_MM_LWP_TC']):
+    src += ['mm_lwp_tc.c']
+
+group = DefineGroup('utestcases', src, depend = ['RT_USING_UTESTCASES'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/examples/utest/testcases/mm/common.h b/examples/utest/testcases/mm/common.h
new file mode 100644
index 0000000000..cffe0e25e5
--- /dev/null
+++ b/examples/utest/testcases/mm/common.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-20     WangXiaoyao  Complete testcase for mm_aspace.c
+ */
+#ifndef __TEST_MM_COMMON_H__
+#define __TEST_MM_COMMON_H__
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <utest.h>
+
+#include <board.h>
+#include <rtthread.h>
+#include <rthw.h>
+#include <lwp_arch.h>
+#include <mmu.h>
+#include <tlb.h>
+
+#include <ioremap.h>
+#include <mm_aspace.h>
+#include <mm_flag.h>
+#include <mm_page.h>
+#include <mm_private.h>
+
+extern rt_base_t rt_heap_lock(void);
+extern void rt_heap_unlock(rt_base_t level);
+
+/**
+ * @brief During the operations, is heap still the same;
+ */
+#define CONSIST_HEAP(statement) do {                 \
+    rt_size_t total, used, max_used;                \
+    rt_size_t totala, useda, max_useda;             \
+    rt_ubase_t level = rt_heap_lock();              \
+    rt_memory_info(&total, &used, &max_used);       \
+    statement;                                      \
+    rt_memory_info(&totala, &useda, &max_useda);    \
+    rt_heap_unlock(level);                          \
+    uassert_true(total == totala);                  \
+    uassert_true(used == useda);                    \
+    uassert_true(max_used == max_useda);            \
+    } while (0)
+
+rt_inline int memtest(volatile char *buf, int value, size_t buf_sz)
+{
+    int ret = 0;
+    for (size_t i = 0; i < buf_sz; i++)
+    {
+        if (buf[i] != value)
+        {
+            ret = -1;
+            break;
+        }
+    }
+    return ret;
+}
+
+#endif /* __TEST_MM_COMMON_H__ */
diff --git a/examples/utest/testcases/mm/mm_api_tc.c b/examples/utest/testcases/mm/mm_api_tc.c
new file mode 100644
index 0000000000..e7c3127064
--- /dev/null
+++ b/examples/utest/testcases/mm/mm_api_tc.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2022-12-14     WangXiaoyao  the first version
+ * 2023-03-20     WangXiaoyao  Format & add more testcases for API under mm_aspace.h
+ */
+#include "common.h"
+
+/**
+ * @brief Testing all APIs under components/mm
+ */
+
+void ioremap_tc(void);
+void flag_tc(void);
+
+#ifdef STANDALONE_TC
+#define TC_ASSERT(expr)                                                        \
+    ((expr)                                                                    \
+         ? 0                                                                   \
+         : rt_kprintf("AssertFault(%d): %s\n", __LINE__, RT_STRINGIFY(expr)))
+#else
+#define TC_ASSERT(expr) uassert_true(expr)
+#endif
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+#include "test_aspace_api.h"
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(aspace_tc);
+    UTEST_UNIT_RUN(ioremap_tc);
+    UTEST_UNIT_RUN(flag_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.mm.api_tc", utest_tc_init, utest_tc_cleanup, 20);
+
+void ioremap_tc(void)
+{
+    const size_t bufsz = 0x1000;
+    void *paddr = (void *)rt_pages_alloc(rt_page_bits(bufsz)) + PV_OFFSET;
+    int *vaddr;
+    vaddr = rt_ioremap_cached(paddr, bufsz);
+    if (vaddr)
+    {
+        TC_ASSERT(*vaddr == *(int *)(paddr - PV_OFFSET));
+
+        rt_iounmap(vaddr);
+        rt_pages_free(paddr - PV_OFFSET, 0);
+    }
+}
+
+void flag_tc(void)
+{
+    size_t flags;
+
+    flags = MMF_CREATE(MMF_MAP_FIXED, 0x4000);
+    TC_ASSERT(MMF_GET_CNTL(flags) == (MMF_MAP_FIXED | MMF_REQUEST_ALIGN));
+    TC_ASSERT((1 << MMF_GET_ALIGN(flags)) == 0x4000);
+
+    flags = MMF_CREATE(MMF_MAP_FIXED, 0);
+    TC_ASSERT(MMF_GET_CNTL(flags) == MMF_MAP_FIXED);
+    TC_ASSERT(MMF_GET_ALIGN(flags) == 0);
+}
+
+#if 0
+
+#define BUF_SIZE (4ul << 20)
+static char ALIGN(BUF_SIZE) buf[BUF_SIZE];
+
+void buddy_tc(void)
+{
+    size_t total, free;
+    rt_page_get_info(&total, &free);
+
+    rt_region_t region = {
+        .start = (size_t)buf,
+        .end = (size_t)buf + BUF_SIZE,
+    };
+
+    size_t new_total, new_free;
+    rt_page_install(region);
+    rt_page_get_info(&new_total, &new_free);
+    TC_ASSERT(new_total - total == (BUF_SIZE >> ARCH_PAGE_SHIFT));
+    TC_ASSERT(new_free > free);
+}
+
+void mmu_page_tc()
+{
+    mm_aspace_t aspace = ASPACE_NEW();
+    size_t total, free;
+    rt_page_get_info(&total, &free);
+    rt_hw_mmu_map(aspace, (void *)0x3fffffffff, 0, ARCH_PAGE_SIZE,
+                  MMU_MAP_K_RWCB);
+    rt_hw_mmu_unmap(aspace, (void *)0x3fffffffff, ARCH_PAGE_SIZE);
+
+    size_t new_total, new_free;
+    rt_page_get_info(&new_total, &new_free);
+    TC_ASSERT(new_free == free);
+    mm_aspace_delete(aspace);
+}
+#endif
diff --git a/examples/utest/testcases/mm/mm_libcpu_tc.c b/examples/utest/testcases/mm/mm_libcpu_tc.c
new file mode 100644
index 0000000000..a8e9c5c06b
--- /dev/null
+++ b/examples/utest/testcases/mm/mm_libcpu_tc.c
@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-17     WangXiaoyao  cache API unit test
+ */
+#include <rtthread.h>
+
+#ifdef ARCH_RISCV64
+#include "test_cache_rv64.h"
+#elif defined(ARCH_ARMV8)
+#include "test_cache_aarch64.h"
+#endif
diff --git a/examples/utest/testcases/mm/mm_lwp_tc.c b/examples/utest/testcases/mm/mm_lwp_tc.c
new file mode 100644
index 0000000000..83c3030273
--- /dev/null
+++ b/examples/utest/testcases/mm/mm_lwp_tc.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-27     WangXiaoyao  testcase for lwp
+ */
+
+#include "common.h"
+#include <lwp.h>
+#include "lwp_arch.h"
+#include "lwp_user_mm.h"
+#include "mm_aspace.h"
+#include "mmu.h"
+
+/**
+ * @brief user map API
+ * rt_varea_t lwp_map_user_varea(struct rt_lwp *lwp, void *map_va, size_t map_size);
+ * rt_varea_t lwp_map_user_varea_ext(struct rt_lwp *lwp, void *map_va, size_t map_size, size_t flags);
+ */
+#if 1 /* make it clear to identify the block :) */
+    /* for testing on _aspace_traverse */
+    static void *_prev_end;
+    static size_t _count;
+    static int _test_increase(rt_varea_t varea, void *param)
+    {
+        uassert_true(varea->start >= _prev_end);
+        _prev_end = varea->start + varea->size;
+        _count += 1;
+        return 0;
+    }
+    #define TEST_VAREA_INSERT(statement, aspace) do {\
+        size_t _prev_count; \
+        _count = 0;         \
+        _prev_end = 0;      \
+        rt_aspace_traversal((aspace), _test_increase, NULL);\
+        _prev_count = _count; \
+        statement;          \
+        _count = 0;         \
+        _prev_end = 0;      \
+        rt_aspace_traversal((aspace), _test_increase, NULL);\
+        uassert_true(_prev_count + 1 == _count); \
+        } while (0)
+#endif
+
+static void test_user_map_varea(void)
+{
+    const size_t buf_sz = ARCH_PAGE_SIZE * 4;
+    struct rt_lwp *lwp;
+    rt_varea_t varea;
+    lwp = lwp_new();
+
+    uassert_true(!!lwp);
+    uassert_true(!lwp_user_space_init(lwp, 0));
+
+    TEST_VAREA_INSERT(
+        varea = lwp_map_user_varea(lwp, 0, buf_sz),
+        lwp->aspace);
+    uassert_true(!!varea);
+    uassert_true(varea->attr == (MMU_MAP_U_RWCB));
+    uassert_true(varea->size == buf_sz);
+    uassert_true(varea->aspace == lwp->aspace);
+    uassert_true(varea->flag == 0);
+    uassert_true(varea->start != 0);
+    uassert_true(varea->start >= (void *)USER_VADDR_START && varea->start < (void *)USER_VADDR_TOP);
+
+    uassert_true(!lwp_ref_dec(lwp));
+}
+
+static void test_user_map_varea_ext(void)
+{
+    const size_t buf_sz = ARCH_PAGE_SIZE * 4;
+    struct rt_lwp *lwp;
+    rt_varea_t varea;
+    lwp = lwp_new();
+
+    uassert_true(!!lwp);
+    uassert_true(!lwp_user_space_init(lwp, 0));
+
+    TEST_VAREA_INSERT(
+        varea = lwp_map_user_varea_ext(lwp, 0, buf_sz, LWP_MAP_FLAG_NOCACHE),
+        lwp->aspace);
+    uassert_true(!!varea);
+    uassert_true(varea->attr == (MMU_MAP_U_RW));
+    uassert_true(varea->size == buf_sz);
+    uassert_true(varea->aspace == lwp->aspace);
+    uassert_true(varea->flag == 0);
+    uassert_true(varea->start != 0);
+    uassert_true(varea->start >= (void *)USER_VADDR_START && varea->start < (void *)USER_VADDR_TOP);
+
+    uassert_true(!lwp_ref_dec(lwp));
+}
+
+static void user_map_varea_tc(void)
+{
+    CONSIST_HEAP(test_user_map_varea());
+    CONSIST_HEAP(test_user_map_varea_ext());
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(user_map_varea_tc);
+}
+UTEST_TC_EXPORT(testcase, "testcases.lwp.mm_tc", utest_tc_init, utest_tc_cleanup, 20);
diff --git a/examples/utest/testcases/mm/semaphore.h b/examples/utest/testcases/mm/semaphore.h
new file mode 100644
index 0000000000..076f820cf2
--- /dev/null
+++ b/examples/utest/testcases/mm/semaphore.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-24     WangXiaoyao  Complete testcase for synchronization
+ */
+#ifndef __SEMAPHORE_H__
+#define __SEMAPHORE_H__
+
+#include <stdatomic.h>
+
+typedef struct {
+    atomic_int count;
+} semaphore_t;
+
+void semaphore_init(semaphore_t *sem, int count)
+{
+    atomic_init(&sem->count, count);
+}
+
+void semaphore_wait(semaphore_t *sem)
+{
+    int count;
+    do {
+        count = atomic_load(&sem->count);
+    } while (count == 0 || !atomic_compare_exchange_weak(&sem->count, &count, count - 1));
+}
+
+void semaphore_signal(semaphore_t *sem)
+{
+    atomic_fetch_add(&sem->count, 1);
+}
+
+#endif /* __SEMAPHORE_H__ */
diff --git a/examples/utest/testcases/mm/test_aspace_api.h b/examples/utest/testcases/mm/test_aspace_api.h
new file mode 100644
index 0000000000..d24204544b
--- /dev/null
+++ b/examples/utest/testcases/mm/test_aspace_api.h
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-20     WangXiaoyao  Complete testcase for mm_aspace.c
+ */
+#ifndef __TEST_ASPACE_API_H__
+#define __TEST_ASPACE_API_H__
+
+#include "common.h"
+#include "lwp_arch.h"
+#include "test_aspace_api_internal.h"
+#include "test_synchronization.h"
+
+/**
+ * @brief API for aspace create/destroy
+ *
+ * rt_aspace_t rt_aspace_create(void *start, rt_size_t length, void *pgtbl);
+ * rt_aspace_t rt_aspace_init(rt_aspace_t aspace, void *start, rt_size_t length, void *pgtbl);
+ * void rt_aspace_delete(rt_aspace_t aspace);
+ * void rt_aspace_detach(rt_aspace_t aspace);
+ *
+ * the init & detach is covered by create & detach
+ */
+
+static void aspace_create_tc(void)
+{
+    /* test robustness, detect failure and recover status of overall system */
+    rt_aspace_t aspace;
+
+    CONSIST_HEAP(aspace = rt_aspace_create((void *)(0 - 0x1000), 0x1000, NULL));
+    uassert_true(!aspace);
+}
+
+#if 1 /* make it clear to identify the block :) */
+    /* for testing on _aspace_traverse */
+    static void *_prev_end;
+    static size_t _count;
+    static int _test_increase(rt_varea_t varea, void *param)
+    {
+        uassert_true(varea->start >= _prev_end);
+        _prev_end = varea->start + varea->size;
+        _count += 1;
+        return 0;
+    }
+#endif
+
+static void aspace_delete_tc(void)
+{
+    /**
+     * @brief Requirements: delete should recycle all types of vareas properly inside
+     * and release the resource allocated for it
+     */
+    rt_aspace_t aspace;
+    struct rt_mm_va_hint hint = {.flags = 0,
+                                 .map_size = 0x1000,
+                                 .prefer = 0};
+    struct rt_varea varea_phy;
+    struct rt_varea varea_mobj;
+    void *pgtbl;
+    void *vaddr;
+
+    /* compatible to armv7a */
+    pgtbl = rt_pages_alloc(2);
+    uassert_true(!!pgtbl);  /* page must be usable */
+    rt_memset(pgtbl, 0, ARCH_PAGE_SIZE);
+
+    CONSIST_HEAP({
+        aspace = rt_aspace_create((void *)USER_VADDR_START, USER_VADDR_TOP - USER_VADDR_START, pgtbl);
+        uassert_true(!!aspace);
+
+        /* insert 4 types of vareas into this aspace */
+        hint.limit_start = aspace->start;
+        hint.limit_range_size = aspace->size;
+        uassert_true(!rt_aspace_map_phy(aspace, &hint, MMU_MAP_K_RWCB, 0, &vaddr));
+        uassert_true(!rt_aspace_map_phy_static(aspace, &varea_phy, &hint, MMU_MAP_K_RWCB, 0, &vaddr));
+        uassert_true(!rt_aspace_map(aspace, &vaddr, 0x1000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+        uassert_true(!rt_aspace_map_static(aspace, &varea_mobj, &vaddr, 0x1000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+
+        /* for testing on _aspace_traverse */
+        _count = 0;
+        _prev_end = 0;
+        uassert_true(!rt_aspace_traversal(aspace, _test_increase, 0));
+        /* ensure the mapping is done */
+        uassert_true(_count == 4);
+
+        rt_aspace_delete(aspace);
+
+        uassert_true(rt_pages_free(pgtbl, 2) == 1); /* page free must success */
+    });
+}
+
+/**
+ * @brief Memory Map on Virtual Address Space to Mappable Object
+ * int rt_aspace_map(rt_aspace_t aspace, void **addr, rt_size_t length, rt_size_t attr,
+ *                   mm_flag_t flags, rt_mem_obj_t mem_obj, rt_size_t offset);
+ * int rt_aspace_map_static(rt_aspace_t aspace, rt_varea_t varea, void **addr,
+ *                          rt_size_t length, rt_size_t attr, mm_flag_t flags,
+ *                          rt_mem_obj_t mem_obj, rt_size_t offset);
+ */
+static void aspace_map_tc(void)
+{
+    /**
+     * @brief Requirement:
+     * Robustness, filter out invalid input
+     */
+    void *vaddr = RT_NULL;
+    uassert_true(rt_aspace_map(0, &vaddr, 0x1000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+    uassert_true(vaddr == RT_NULL);
+
+    vaddr = (void *)USER_VADDR_START;
+    uassert_true(rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+    uassert_true(vaddr == RT_NULL);
+
+    uassert_true(rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, -1, &rt_mm_dummy_mapper, 0));
+    uassert_true(vaddr == RT_NULL);
+
+    /**
+     * @brief Requirement:
+     * in _rt_aspace_map:_varea_install
+     * not covering an existed varea if a named mapping is mandatory
+     */
+    vaddr = (void *)((rt_ubase_t)aspace_map_tc & ~ARCH_PAGE_MASK);
+    CONSIST_HEAP(
+        uassert_true(
+            rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, MMF_MAP_FIXED, &rt_mm_dummy_mapper, 0)));
+    uassert_true(vaddr == RT_NULL);
+
+    /**
+     * @brief Requirement:
+     * in _rt_aspace_map:_varea_install:_find_free
+     * verify that this routine can choose a free region with specified size
+     * and specified alignment requirement
+     */
+    #define ALIGN_REQ (0x04000000)
+    CONSIST_HEAP({
+        uassert_true(!rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, MMF_CREATE(0, ALIGN_REQ), &rt_mm_dummy_mapper, 0));
+        uassert_true(!((rt_ubase_t)vaddr & (ALIGN_REQ - 1)));
+        rt_aspace_unmap(&rt_kernel_space, vaddr);
+    });
+
+    /* test internal APIs */
+    test_find_free();
+}
+
+/**
+ * @brief Page frames mapping to varea
+ * complete the page table on specified varea, and handle tlb maintenance
+ * There are 2 variants of this API
+ *
+ * int rt_varea_map_page(rt_varea_t varea, void *vaddr, void *page);
+ * int rt_varea_map_range(rt_varea_t varea, void *vaddr, void *paddr, rt_size_t length);
+ */
+
+static rt_varea_t _create_varea(const size_t size)
+{
+    rt_varea_t varea;
+    void *vaddr = rt_ioremap_start;
+
+    varea = rt_malloc(sizeof(*varea));
+    uassert_true(!!varea);
+    uassert_true(!rt_aspace_map_static(&rt_kernel_space, varea, &vaddr, size, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+    varea->flag &= ~MMF_STATIC_ALLOC;
+    uassert_true(!!vaddr);
+    return varea;
+}
+
+static void test_varea_map_page(void)
+{
+    /**
+     * @brief rt_varea_map_page
+     * Requirements: complete the page table entry
+     */
+    const size_t buf_sz = 4 * ARCH_PAGE_SIZE;
+    rt_varea_t varea = _create_varea(buf_sz);
+    for (size_t i = 0; i < buf_sz; i += ARCH_PAGE_SIZE)
+    {
+        void *page = rt_pages_alloc(0);
+        uassert_true(!!page);
+        uassert_true(!rt_varea_map_page(varea, varea->start + i, page));
+
+        /* let page manager handle the free of page */
+        rt_varea_pgmgr_insert(varea, page);
+        uassert_true(rt_kmem_v2p(varea->start + i) == (page + PV_OFFSET));
+    }
+
+    uassert_true(!rt_aspace_unmap(&rt_kernel_space, varea->start));
+}
+
+static void test_varea_map_range(void)
+{
+    /**
+     * @brief rt_varea_map_range
+     * Requirements: complete the page table entry
+     */
+    const size_t buf_sz = 4 * ARCH_PAGE_SIZE;
+    rt_varea_t varea = _create_varea(buf_sz);
+    void *page = rt_pages_alloc(rt_page_bits(buf_sz));
+    uassert_true(!!page);
+    uassert_true(!rt_varea_map_range(varea, varea->start, page + PV_OFFSET, buf_sz));
+    for (size_t i = 0; i < buf_sz; i += ARCH_PAGE_SIZE)
+    {
+        uassert_true(rt_kmem_v2p(varea->start + i) == (page + i + PV_OFFSET));
+    }
+
+    uassert_true(rt_pages_free(page, rt_page_bits(buf_sz)));
+    uassert_true(!rt_aspace_unmap(&rt_kernel_space, varea->start));
+}
+
+static void varea_map_tc(void)
+{
+    CONSIST_HEAP(test_varea_map_page());
+    CONSIST_HEAP(test_varea_map_range());
+}
+
+static void aspace_traversal_tc(void)
+{
+    /**
+     * @brief Requirement
+     * Iterate over each varea in the kernel space
+     */
+    CONSIST_HEAP(aspace_delete_tc());
+    uassert_true(4 == _count);
+}
+
+#ifdef ARCH_ARMV8
+static void aspace_control_tc(void)
+{
+    /* this case is designed only for one page size */
+    const size_t buf_sz = ARCH_PAGE_SIZE;
+    void *vaddr = RT_NULL;
+    volatile char *remap_nocache;
+    int platform_cache_probe;
+    uassert_true(!rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, MMF_PREFETCH, &rt_mm_dummy_mapper, 0));
+    uassert_true(!!vaddr);
+
+    /* map non-cacheable region to verify cache */
+    remap_nocache = rt_ioremap(rt_kmem_v2p(vaddr), buf_sz);
+    uassert_true(!!remap_nocache);
+
+    /* pre probing */
+    rt_memset(vaddr, 0xba, buf_sz);
+    /* no need to sync transaction on same core */
+    platform_cache_probe = memtest(remap_nocache, 0xab, buf_sz);
+
+    if (!platform_cache_probe)
+    {
+        LOG_I("Cannot distinguish cache attribution on current platform");
+    }
+    else
+    {
+        LOG_I("Ready to verify attribution of cached & non-cacheable");
+    }
+
+    /* verify cache */
+    uassert_true(!rt_aspace_control(&rt_kernel_space, vaddr, MMU_CNTL_NONCACHE));
+    rt_memset(vaddr, 0, buf_sz);
+    uassert_true(!memtest(remap_nocache, 0, buf_sz));
+
+    /* another option as MMU_CNTL_CACHE */
+    uassert_true(!rt_aspace_control(&rt_kernel_space, vaddr, MMU_CNTL_CACHE));
+
+    rt_iounmap(remap_nocache);
+    uassert_true(!rt_aspace_unmap(&rt_kernel_space, vaddr));
+}
+#endif
+
+static void aspace_tc(void)
+{
+    UTEST_UNIT_RUN(aspace_create_tc);
+    UTEST_UNIT_RUN(aspace_delete_tc);
+    UTEST_UNIT_RUN(aspace_map_tc);
+    UTEST_UNIT_RUN(aspace_traversal_tc);
+#ifdef ARCH_ARMV8
+    UTEST_UNIT_RUN(aspace_control_tc);
+#endif
+    UTEST_UNIT_RUN(varea_map_tc);
+
+    /* functionality */
+    UTEST_UNIT_RUN(synchronization_tc);
+    return ;
+}
+
+#endif /* __TEST_ASPACE_API_H__ */
diff --git a/examples/utest/testcases/mm/test_aspace_api_internal.h b/examples/utest/testcases/mm/test_aspace_api_internal.h
new file mode 100644
index 0000000000..f8e9d63e91
--- /dev/null
+++ b/examples/utest/testcases/mm/test_aspace_api_internal.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-23     WangXiaoyao  Complete testcase for internal APIs
+ */
+#ifndef __TEST_ASPACE_API_INTERNAL_H__
+#define __TEST_ASPACE_API_INTERNAL_H__
+
+#include "common.h"
+#include "mmu.h"
+#include "test_bst_adpt.h"
+#include <stddef.h>
+
+/**
+ * @brief 3 cases for find free:
+ * with prefer & MAP_FIXED
+ * with prefer
+ * without prefer
+ *
+ * the requirement of find free:
+ * it will return a subset in address space that is free
+ * the subset contains `length` contiguous elements
+ * the alignment is satisfied
+ */
+static void test_find_free(void)
+{
+    void *top_page = rt_kernel_space.start + rt_kernel_space.size - 0x1000;
+    void *vaddr = top_page;
+
+    CONSIST_HEAP({
+        /* type 1, on success */
+        uassert_true(!rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, MMF_MAP_FIXED, &rt_mm_dummy_mapper, 0));
+        uassert_true(vaddr == top_page);
+        /* type 1, on failure */
+        uassert_true(rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, MMF_MAP_FIXED, &rt_mm_dummy_mapper, 0));
+        uassert_true(!vaddr);
+
+        /* type 2, on success */
+        vaddr = top_page;
+        uassert_true(!rt_aspace_map(&rt_kernel_space, &vaddr, 0x1000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+        uassert_true(vaddr < top_page);
+        uassert_true(!!vaddr);
+        rt_aspace_unmap(&rt_kernel_space, vaddr);
+        /* type 2, on failure */
+        vaddr = rt_kernel_space.start;
+        uassert_true(-RT_ENOSPC == rt_aspace_map(&rt_kernel_space, &vaddr, rt_kernel_space.size - 0x08000000, MMU_MAP_K_RWCB, 0, &rt_mm_dummy_mapper, 0));
+        uassert_true(!vaddr);
+
+        /* type 3, on success is covered by ioremap */
+        /* type 3, on failure */
+        size_t map_size = ARCH_PAGE_SIZE;
+        while (1)
+        {
+            void *va = rt_ioremap(0, map_size);
+            if (va)
+            {
+                uassert_true(1);
+                rt_iounmap(va);
+                map_size <<= 1;
+            }
+            else
+            {
+                uassert_true(1);
+                break;
+            }
+        }
+
+        /* free top page */
+        rt_aspace_unmap(&rt_kernel_space, top_page);
+    });
+
+    /* test mm_private.h */
+    CONSIST_HEAP(test_bst_adpt());
+}
+
+#endif /* __TEST_ASPACE_API_INTERNAL_H__ */
diff --git a/examples/utest/testcases/mm/test_bst_adpt.h b/examples/utest/testcases/mm/test_bst_adpt.h
new file mode 100644
index 0000000000..eb075db6ed
--- /dev/null
+++ b/examples/utest/testcases/mm/test_bst_adpt.h
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-23     WangXiaoyao  Complete testcase for internal APIs
+ */
+#ifndef __TEST_BST_ADPT_H__
+#define __TEST_BST_ADPT_H__
+
+#include "common.h"
+#include "lwp_arch.h"
+
+#ifdef RT_USING_SMART
+#include "lwp_user_mm.h"
+#include "mm_aspace.h"
+#include "mm_flag.h"
+#include <mm_private.h>
+#include <lwp_pid.h>
+
+void test_bst_adpt(void)
+{
+    size_t flags = MMF_MAP_FIXED;
+    void *target_va = (void *)USER_VADDR_START + 0x3000;
+    size_t map_size = 0x1000;
+    void *prev_va = target_va - map_size;
+    void *next_va = target_va + map_size + 1;
+    struct rt_lwp *lwp;
+    rt_aspace_t aspace;
+    rt_mem_obj_t mem_obj;
+
+    /* create aspace by lwp */
+    lwp = lwp_new();
+    uassert_true(!!lwp);
+    uassert_true(!lwp_user_space_init(lwp, 0));
+    aspace = lwp->aspace;
+    mem_obj = &lwp->lwp_obj->mem_obj;
+    uassert_true(!!aspace);
+    uassert_true(!!mem_obj);
+
+    /* _aspace_bst_search not cover */
+    uassert_true(!_aspace_bst_search(aspace, target_va)); // ret == NULL
+
+    uassert_true(
+        !rt_aspace_map(aspace, &target_va, map_size, MMU_MAP_K_RWCB, flags, mem_obj, 0));
+    /* 2 wrappers */
+    uassert_true(
+        !rt_aspace_map(aspace, &prev_va, map_size - 1, MMU_MAP_K_RWCB, flags, mem_obj, 0));
+    uassert_true(
+        !rt_aspace_map(aspace, &next_va, map_size - 1, MMU_MAP_K_RWCB, flags, mem_obj, 0));
+
+    /* _aspace_bst_search */
+    uassert_true(!!_aspace_bst_search(aspace, target_va));
+    uassert_true(!_aspace_bst_search(aspace, target_va + map_size));
+    uassert_true(!_aspace_bst_search(aspace, target_va - 1));
+
+    /**
+     * @brief _aspace_bst_search_exceed
+     * for given map [start, end]
+     */
+    rt_varea_t find;
+    find = _aspace_bst_search_exceed(aspace, target_va);
+    uassert_true(!!find);
+    uassert_true(find->start == target_va);
+
+    rt_varea_t last = ASPACE_VAREA_LAST(aspace);
+    find = _aspace_bst_search_exceed(aspace, last->start + 1);
+    uassert_true(!find);
+
+    /**
+     * @brief _aspace_bst_search_overlap
+     * for given map [start, end], five types of overlapping
+     */
+    /* 1. all below */
+    struct _mm_range range = {.start = prev_va - 2, .end = prev_va - 1};
+    find = _aspace_bst_search_overlap(aspace, range);
+    uassert_true(!find);
+    /* 2. start below */
+    range.end = prev_va;
+    find = _aspace_bst_search_overlap(aspace, range);
+    uassert_true(!!find);
+    uassert_true(find->start == prev_va);
+    /* 3. all wrapped */
+    range.start = prev_va;
+    range.end = prev_va + 1;
+    find = _aspace_bst_search_overlap(aspace, range);
+    uassert_true(!!find);
+    uassert_true(find->start == prev_va);
+    /* 4. end exceed */
+    range.start = next_va;
+    range.end = next_va + map_size + 1;
+    find = _aspace_bst_search_overlap(aspace, range);
+    uassert_true(!!find);
+    uassert_true(find->start == next_va);
+    /* 5. all exceed */
+    range.start = next_va + map_size;
+    find = _aspace_bst_search_overlap(aspace, range);
+    uassert_true(!find);
+
+    lwp_ref_dec(lwp);
+}
+
+#endif /* RT_USING_SMART */
+
+#endif /* __TEST_BST_ADPT_H__ */
diff --git a/examples/utest/testcases/mm/test_cache_aarch64.h b/examples/utest/testcases/mm/test_cache_aarch64.h
new file mode 100644
index 0000000000..b103eda213
--- /dev/null
+++ b/examples/utest/testcases/mm/test_cache_aarch64.h
@@ -0,0 +1,115 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-17     WangXiaoyao  cache API unit test
+ */
+#ifndef __TEST_CACHE_AARCH64_H__
+#define __TEST_CACHE_AARCH64_H__
+
+#include "common.h"
+#include <cache.h>
+
+const char *platform_cache_not_guarantee = "Cannot guarantee cache operation works";
+
+/**
+ * ==============================================================
+ * TEST FEATURE
+ * API under cache.h
+ *
+ * void rt_hw_icache_invalidate_range(unsigned long start_addr, int size);
+ * void rt_hw_cpu_icache_invalidate(void *addr, rt_size_t size);
+ * void rt_hw_cpu_dcache_clean_and_invalidate(void *addr, rt_size_t size);
+ * ==============================================================
+ */
+
+static int _get1_const(void)
+{
+    return 1;
+}
+
+static int _get1(void)
+{
+    return 1;
+}
+
+static int _get2(void)
+{
+    return 2;
+}
+
+/* hot patching codes and test if the value can be seen by icache */
+static void _test_icache_invalidate_range(void)
+{
+    /* reset _get1 */
+    rt_memcpy(_get1, _get1_const, _get2 - _get1);
+    rt_hw_cpu_dcache_clean(_get1, _get2 - _get1);
+    rt_hw_cpu_icache_invalidate(_get1, _get2 - _get1);
+    uassert_true(1 == _get1());
+
+    /* now copy _get2 to _get1 */
+    rt_memcpy(_get1, _get2, _get2 - _get1);
+    if (1 != _get1())
+        LOG_W(platform_cache_not_guarantee);
+
+    rt_hw_cpu_dcache_clean(_get1, _get2 - _get1);
+    rt_hw_cpu_icache_invalidate(_get1, _get2 - _get1);
+    __asm__ volatile("isb");
+    uassert_true(2 == _get1());
+    LOG_I("%s ok", __func__);
+}
+
+/* due to hardware feature of cortex-a, we should done this on 2 separated cpu */
+static void _test_dcache_clean_and_invalidate(void)
+{
+    const size_t padding = 1024 * 2;
+    const size_t buf_sz = ARCH_PAGE_SIZE * 2;
+    volatile char *remap_nocache;
+    char *page = rt_pages_alloc(rt_page_bits(buf_sz));
+    uassert_true(!!page);
+
+    rt_memset(page, 0xab, buf_sz);
+    rt_hw_cpu_dcache_invalidate(page, buf_sz);
+
+    int _outdate_flag = 0;
+    if (memtest(page, 0xab, buf_sz))
+        _outdate_flag = 1;
+
+    /* after ioremap, we can access system memory to verify outcome */
+    remap_nocache = rt_ioremap(page + PV_OFFSET, buf_sz);
+
+    rt_hw_cpu_dcache_clean(page + padding, ARCH_PAGE_SIZE);
+    memtest(remap_nocache + padding, 0xab, ARCH_PAGE_SIZE);
+
+    if (!_outdate_flag)
+        LOG_W(platform_cache_not_guarantee);
+    else
+        LOG_I("%s ok", __func__);
+
+    rt_pages_free(page, 0);
+    rt_iounmap(remap_nocache);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    /* todo: format API under cache.h first */
+    UTEST_UNIT_RUN(_test_icache_invalidate_range);
+    UTEST_UNIT_RUN(_test_dcache_clean_and_invalidate);
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.libcpu.cache", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif /* __TEST_CACHE_AARCH64_H__ */
diff --git a/examples/utest/testcases/mm/test_cache_rv64.h b/examples/utest/testcases/mm/test_cache_rv64.h
new file mode 100644
index 0000000000..3bd7fc26eb
--- /dev/null
+++ b/examples/utest/testcases/mm/test_cache_rv64.h
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-17     WangXiaoyao  cache API unit test
+ */
+
+#ifndef __TEST_CACHE_RV64_H
+#define __TEST_CACHE_RV64_H
+
+#ifdef ARCH_RISCV64
+#include "riscv_mmu.h"
+#include <utest.h>
+#include <cache.h>
+#include <page.h>
+#include <mmu.h>
+#include <ioremap.h>
+
+/**
+ * ==============================================================
+ * TEST FEATURE
+ * API under cache.h
+ * rt_hw_sync_cache_local
+ *
+ * rt_hw_cpu_dcache_clean
+ * rt_hw_cpu_dcache_invalidate
+ * rt_hw_cpu_dcache_clean_invalidate
+ * rt_hw_cpu_dcache_clean_all
+ * rt_hw_cpu_dcache_invalidate_all // meaningless
+ * rt_hw_cpu_dcache_clean_invalidate_all
+ * rt_hw_cpu_icache_invalidate
+ * rt_hw_cpu_icache_invalidate_all
+ * ==============================================================
+ */
+
+/* Ensure the ISA is valid for target ARCHITECTURE */
+static void _illegal_instr(void)
+{
+    rt_hw_sync_cache_local(_illegal_instr, 64);
+    rt_hw_cpu_dcache_clean(_illegal_instr, 64);
+    rt_hw_cpu_dcache_invalidate(_illegal_instr, 64);
+    // rt_hw_cpu_dcache_clean_invalidate(_illegal_instr, 64); // C908 ONLY
+    rt_hw_cpu_dcache_clean_all();
+    rt_hw_cpu_dcache_invalidate_all(); // !CAREFUL must be inline
+    // rt_hw_cpu_dcache_clean_invalidate_all(); // C908 ONLY
+    rt_hw_cpu_icache_invalidate(_illegal_instr, 64);
+    rt_hw_cpu_icache_invalidate_all();
+    uassert_true(1);
+    LOG_I("All ok!");
+}
+
+static int _get1(void)
+{
+    return 1;
+}
+
+static int _get2(void)
+{
+    return 2;
+}
+
+/* hot patching codes and test if the value can be seen by icache */
+static void _test_cache_sync(void)
+{
+    uassert_true(1 == _get1());
+    rt_memcpy(_get1, _get2, _get2 - _get1);
+    uassert_true(1 == _get1());
+    rt_hw_sync_cache_local(_get1, _get2 - _get1);
+    uassert_true(2 == _get1());
+    LOG_I("%s ok", __func__);
+}
+
+/* test clean operation should do and only effect the range specified by writing to a page */
+static void _test_dcache_clean(void)
+{
+    const size_t padding = 1024 * 3;
+    const size_t buf_sz = ARCH_PAGE_SIZE * 2;
+
+    char *page = rt_pages_alloc(rt_page_bits(buf_sz));
+    uassert_true(!!page);
+
+    /* after ioremap, we can access system memory to verify outcome */
+    volatile char *remap_nocache = rt_ioremap(page + PV_OFFSET, buf_sz);
+    rt_memset(page, 0xab, buf_sz);
+    rt_hw_cpu_sync();
+
+    int _outdate_flag = 0;
+    for (size_t i = padding; i < ARCH_PAGE_SIZE; i++)
+    {
+        if (remap_nocache[i] != 0xab)
+        {
+            _outdate_flag = 1;
+            break;
+        }
+    }
+
+    page[padding - 1] = 0xac;
+    page[padding + ARCH_PAGE_SIZE] = 0xac;
+    rt_hw_cpu_dcache_clean(page + padding, ARCH_PAGE_SIZE);
+
+    /* free some space in dcache to avoid padding data being written back */
+    rt_hw_cpu_dcache_invalidate(page + padding, ARCH_PAGE_SIZE);
+    uassert_true(remap_nocache[padding - 1] != 0xac);
+    uassert_true(remap_nocache[padding + ARCH_PAGE_SIZE] != 0xac);
+
+    int _test_ok = 1;
+    for (size_t i = padding; i < ARCH_PAGE_SIZE; i++)
+    {
+        if (remap_nocache[i] != 0xab)
+        {
+            _test_ok = 0;
+            break;
+        }
+    }
+    uassert_true(_test_ok);
+
+    if (!_outdate_flag)
+        LOG_W("Cannot guarantee clean works");
+    else
+        LOG_I("%s ok", __func__);
+
+    rt_pages_free(page, 0);
+    rt_iounmap(remap_nocache);
+}
+
+/* test clean op should do and only effect the range */
+static void _test_dcache_invalidate(void)
+{
+    const size_t padding = 1024 * 3;
+    const size_t buf_sz = ARCH_PAGE_SIZE * 2;
+
+    /* prepare */
+    char *page = rt_pages_alloc(rt_page_bits(buf_sz));
+    uassert_true(!!page);
+
+    volatile char *remap_nocache = rt_ioremap(page + PV_OFFSET, buf_sz);
+    rt_memset(page, 0x0, buf_sz);
+    rt_hw_cpu_sync();
+
+    int _outdate_flag = 0;
+    for (size_t i = padding; i < ARCH_PAGE_SIZE; i++)
+    {
+        remap_nocache[i] = 0xab;
+        rt_hw_cpu_dcache_invalidate((void *)&remap_nocache[i], 1);
+    }
+
+    rt_hw_cpu_dcache_clean_all();
+
+    int _test_ok = 1;
+    for (size_t i = padding; i < ARCH_PAGE_SIZE; i++)
+    {
+        if (remap_nocache[i] == 0xab)
+        {
+            _test_ok = 0;
+            break;
+        }
+    }
+    uassert_true(_test_ok);
+
+    LOG_I("%s ok", __func__);
+
+    rt_pages_free(page, 0);
+    rt_iounmap(remap_nocache);
+}
+
+static rt_err_t utest_tc_init(void)
+{
+    return RT_EOK;
+}
+
+static rt_err_t utest_tc_cleanup(void)
+{
+    return RT_EOK;
+}
+
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(_illegal_instr);
+#ifdef BOARD_allwinnerd1s
+    /* thead ISA extension */
+    UTEST_UNIT_RUN(_test_cache_sync);
+    /* part of it is hard to test on simulation machine */
+    UTEST_UNIT_RUN(_test_dcache_clean);
+    UTEST_UNIT_RUN(_test_dcache_invalidate);
+#endif
+}
+
+UTEST_TC_EXPORT(testcase, "testcases.libcpu.cache", utest_tc_init, utest_tc_cleanup, 10);
+
+#endif /* ARCH_RISCV64 */
+#endif /* __TEST_CACHE_RV64_H */
diff --git a/examples/utest/testcases/mm/test_synchronization.h b/examples/utest/testcases/mm/test_synchronization.h
new file mode 100644
index 0000000000..7f813ec1f8
--- /dev/null
+++ b/examples/utest/testcases/mm/test_synchronization.h
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-03-24     WangXiaoyao  Complete testcase for synchronization
+ */
+#ifndef __TEST_SYNCHRONIZATION_H__
+#define __TEST_SYNCHRONIZATION_H__
+
+#include "common.h"
+#include "semaphore.h"
+
+#ifdef RT_USING_SMP
+
+#define THREAD_CNT RT_CPUS_NR
+#define TEST_TIMES 2000
+#define PRIO (UTEST_THR_PRIORITY + 1)
+/* size of mapping buffer */
+#define BUF_SIZE (64ul << 10)
+
+/* engage with sibling */
+struct rt_semaphore done;
+static semaphore_t sem1[THREAD_CNT / 2];
+static semaphore_t sem2[THREAD_CNT / 2];
+
+static void *map(void)
+{
+    int err;
+    int flags = MMF_PREFETCH;
+    size_t attr = MMU_MAP_K_RWCB;
+    void *vaddr = 0;
+    err =
+        rt_aspace_map(&rt_kernel_space, &vaddr, BUF_SIZE, attr, flags, &rt_mm_dummy_mapper, 0);
+    if (err)
+        uassert_true(0);
+    return vaddr;
+}
+
+static void unmap(void *buf)
+{
+    int err;
+    err =
+        rt_aspace_unmap(&rt_kernel_space, buf);
+    if (err)
+        uassert_true(0);
+    return ;
+}
+
+static void group1_entry(void *param)
+{
+    const size_t id = (size_t)param;
+    size_t test_times = TEST_TIMES;
+    size_t alive = test_times / 10;
+    void *buf;
+
+    while (test_times--)
+    {
+        if (test_times % alive == 0)
+            uassert_true(1);
+
+        buf = map();
+
+        memset(buf, 'A' + id, BUF_SIZE);
+        /* if other core write to our cache, force the changes to be visible to us */
+        rt_hw_dmb();
+
+        if (memtest(buf, 'A' + id, BUF_SIZE))
+            uassert_true(0);
+
+        semaphore_signal(&sem1[id]);
+        semaphore_wait(&sem2[id]);
+        unmap(buf);
+    }
+
+    rt_sem_release(&done);
+    return;
+}
+
+static void group2_entry(void *param)
+{
+    const size_t id = (size_t)param;
+    size_t test_times = TEST_TIMES;
+    size_t alive = test_times / 10;
+    void *buf;
+
+    while (test_times--)
+    {
+        if (test_times % alive == 0)
+            uassert_true(1);
+
+        semaphore_signal(&sem2[id]);
+        semaphore_wait(&sem1[id]);
+        buf = map();
+
+        memset(buf, 'a' + id, BUF_SIZE);
+        /* if other core write to our cache, force the changes to be visible to us */
+        rt_hw_dmb();
+
+        if (memtest(buf, 'a' + id, BUF_SIZE))
+            uassert_true(0);
+
+        unmap(buf);
+    }
+
+    rt_sem_release(&done);
+    return;
+}
+
+/**
+ * @brief On a smp system, we create at least 4 threads
+ * 2 doing map, 2 doing unmapping at the same moment
+ */
+
+static void synchronization_tc(void)
+{
+    rt_thread_t group1[THREAD_CNT / 2];
+    rt_thread_t group2[THREAD_CNT / 2];
+
+    rt_sem_init(&done, __func__, 0, RT_IPC_FLAG_FIFO);
+
+    for (size_t i = 0; i < THREAD_CNT / 2; i++)
+    {
+        char name[RT_NAME_MAX];
+        rt_sprintf(name, "grp1_%d", i);
+        group1[i] =
+            rt_thread_create(name, group1_entry, (void *)i, ARCH_PAGE_SIZE, PRIO, 10);
+        uassert_true(!!group1[i]);
+        semaphore_init(&sem1[i], 0);
+
+        uassert_true(!rt_thread_startup(group1[i]));
+    }
+
+    for (size_t i = 0; i < THREAD_CNT / 2; i++)
+    {
+        char name[RT_NAME_MAX];
+        rt_sprintf(name, "grp2_%d", i);
+        group2[i] =
+            rt_thread_create(name, group2_entry, (void *)i, ARCH_PAGE_SIZE, PRIO, 10);
+        uassert_true(!!group2[i]);
+        semaphore_init(&sem2[i], 0);
+
+        uassert_true(!rt_thread_startup(group2[i]));
+    }
+
+    /* wait all thread exit */
+    for (size_t i = 0; i < (THREAD_CNT / 2 * 2); i++)
+    {
+        rt_sem_take(&done, RT_WAITING_FOREVER);
+    }
+    LOG_I("all threads exit");
+    rt_sem_detach(&done);
+}
+
+#else /* RT_USING_SMP */
+
+static void synchronization_tc(void)
+{
+    uassert_true(1);
+}
+#endif /* RT_USING_SMP */
+
+#endif /* __TEST_SYNCHRONIZATION_H__ */