diff --git a/Ubiquitous/XiZi_AIoT/hardkernel/arch/arm/armv7-a/cortex-a9/core.h b/Ubiquitous/XiZi_AIoT/hardkernel/arch/arm/armv7-a/cortex-a9/core.h
index 129f07103..c877945ce 100644
--- a/Ubiquitous/XiZi_AIoT/hardkernel/arch/arm/armv7-a/cortex-a9/core.h
+++ b/Ubiquitous/XiZi_AIoT/hardkernel/arch/arm/armv7-a/cortex-a9/core.h
@@ -74,7 +74,7 @@ Modification:
 
 #include "cortex_a9.h"
 
-#define NR_CPU 1
+#define NR_CPU 4
 
 __attribute__((always_inline)) static inline uint32_t user_mode()
 {
diff --git a/Ubiquitous/XiZi_AIoT/hardkernel/cache/cache_common_ope.c b/Ubiquitous/XiZi_AIoT/hardkernel/cache/cache_common_ope.c
index 4d5e33d33..6d05e236a 100644
--- a/Ubiquitous/XiZi_AIoT/hardkernel/cache/cache_common_ope.c
+++ b/Ubiquitous/XiZi_AIoT/hardkernel/cache/cache_common_ope.c
@@ -233,7 +233,6 @@ struct ICacheDone* hardkernel_icache_init(struct TraceTag* hardkernel_tag)
 {
     /* init icache */
     icache_done.enable();
-    // icache_done.disable();
     return &icache_done;
 }
 
@@ -241,6 +240,5 @@ struct DCacheDone* hardkernel_dcache_init(struct TraceTag* hardkernel_tag)
 {
     /* init dcache */
     dcache_done.enable();
-    // dcache_done.disable();
     return &dcache_done;
 }
\ No newline at end of file
diff --git a/Ubiquitous/XiZi_AIoT/hardkernel/hardkernel_init.c b/Ubiquitous/XiZi_AIoT/hardkernel/hardkernel_init.c
index f0d6e6ca7..660b883f9 100644
--- a/Ubiquitous/XiZi_AIoT/hardkernel/hardkernel_init.c
+++ b/Ubiquitous/XiZi_AIoT/hardkernel/hardkernel_init.c
@@ -216,10 +216,10 @@ bool secondary_cpu_hardkernel_init(int cpu_id, struct TraceTag* _hardkernel_tag)
     p_intr_driver->sys_irq_init(cpu_id);
     p_intr_driver->cpu_irq_disable();
     // cache
-    // p_icache_driver->enable();
-    // p_dcache_driver->enable();
-    p_icache_driver->disable();
-    p_dcache_driver->disable();
+    p_icache_driver->enable();
+    p_dcache_driver->enable();
+    // p_icache_driver->disable();
+    // p_dcache_driver->disable();
     // clock
     // p_clock_driver->sys_clock_init();
     p_intr_driver->single_irq_enable(p_clock_driver->get_clock_int(), cpu_id, 0);
diff --git a/Ubiquitous/XiZi_AIoT/hardkernel/intr/arm/armv7-a/cortex-a9/spinlock.c b/Ubiquitous/XiZi_AIoT/hardkernel/intr/arm/armv7-a/cortex-a9/spinlock.c
index e76712945..de844c1b1 100644
--- a/Ubiquitous/XiZi_AIoT/hardkernel/intr/arm/armv7-a/cortex-a9/spinlock.c
+++ b/Ubiquitous/XiZi_AIoT/hardkernel/intr/arm/armv7-a/cortex-a9/spinlock.c
@@ -25,8 +25,24 @@
 #include "task.h"
 #include "trap_common.h"
 
+#include "list.h"
+
+struct lock_node {
+    int cpu_id;
+    struct double_list_node node;
+};
+
+static struct double_list_node lock_request_guard;
+static struct lock_node core_lock_request[NR_CPU];
+static struct spinlock request_lock;
 bool module_spinlock_use_intr_init(void)
 {
+    for (int i = 0; i < NR_CPU; i++) {
+        core_lock_request[i].cpu_id = i;
+        doubleListNodeInit(&core_lock_request[i].node);
+    }
+    doubleListNodeInit(&lock_request_guard);
+    spinlock_init(&request_lock, "requestlock");
     return true;
 }
 
@@ -44,18 +60,31 @@ void spinlock_init(struct spinlock* lock, char* name)
 }
 
 extern int _spinlock_lock(struct spinlock* lock, uint32_t timeout);
+void _spinlock_unlock(struct spinlock* lock);
+
 void spinlock_lock(struct spinlock* lock)
 {
     if (lock->owner_cpu != SPINLOCK_STATE_UNLOCK && lock->owner_cpu == cur_cpuid()) {
         ERROR("spinlock %s lock double locked by core %d\n", lock->name, lock->owner_cpu);
         panic("");
     }
+    // _spinlock_lock(&request_lock, SPINLOCK_LOCK_WAITFOREVER);
+    // doubleListAddOnBack(&core_lock_request[cur_cpuid()].node, &lock_request_guard);
+    // _spinlock_unlock(&request_lock);
+
+    // while (lock_request_guard.next != &core_lock_request[cur_cpuid()].node)
+    //     ;
+
     _spinlock_lock(lock, SPINLOCK_LOCK_WAITFOREVER);
 }
 
-void _spinlock_unlock(struct spinlock* lock);
 void spinlock_unlock(struct spinlock* lock)
 {
+    // assert(lock_request_guard.next == &core_lock_request[cur_cpuid()].node);
+    // _spinlock_lock(&request_lock, SPINLOCK_LOCK_WAITFOREVER);
+    // _double_list_del(core_lock_request[cur_cpuid()].node.prev, core_lock_request[cur_cpuid()].node.next);
+    // _spinlock_unlock(&request_lock);
+
     _spinlock_unlock(lock);
 }
 
diff --git a/Ubiquitous/XiZi_AIoT/hardkernel/mmu/arm/armv7-a/cortex-a9/pagetable_attr.c b/Ubiquitous/XiZi_AIoT/hardkernel/mmu/arm/armv7-a/cortex-a9/pagetable_attr.c
index 477b92a4d..bff47d1b3 100644
--- a/Ubiquitous/XiZi_AIoT/hardkernel/mmu/arm/armv7-a/cortex-a9/pagetable_attr.c
+++ b/Ubiquitous/XiZi_AIoT/hardkernel/mmu/arm/armv7-a/cortex-a9/pagetable_attr.c
@@ -55,7 +55,6 @@ void GetUsrDevPteAttr(uintptr_t* attr)
         init = 1;
 
         usr_pte_attr.entry = 0;
-        usr_pte_attr.S = 1;
         usr_pte_attr.desc_type = PAGE_4K;
         usr_pte_attr.AP1_0 = AccessPermission_KernelUser;
     }
@@ -70,7 +69,6 @@ void GetDevPteAttr(uintptr_t* attr)
         init = 1;
 
         dev_pte_attr.entry = 0;
-        dev_pte_attr.S = 1;
         dev_pte_attr.desc_type = PAGE_4K;
         dev_pte_attr.AP1_0 = AccessPermission_KernelOnly;
     }
diff --git a/Ubiquitous/XiZi_AIoT/softkernel/main.c b/Ubiquitous/XiZi_AIoT/softkernel/main.c
index 0c264e7ed..289ee4d7e 100644
--- a/Ubiquitous/XiZi_AIoT/softkernel/main.c
+++ b/Ubiquitous/XiZi_AIoT/softkernel/main.c
@@ -42,30 +42,6 @@ Modification:
 extern uint32_t _binary_init_start[], _binary_default_fs_start[];
 static struct TraceTag hardkernel_tag, softkernel_tag;
 
-void configure_cpu(uint32_t cpu)
-{
-    const unsigned int all_ways = 0xf;
-
-    disable_strict_align_check();
-
-    // Enable branch prediction
-    arm_branch_target_cache_invalidate();
-    arm_branch_prediction_enable();
-
-    // Enable L1 caches
-    // arm_dcache_enable();
-    // arm_dcache_invalidate();
-    // arm_icache_enable();
-    // arm_icache_invalidate();
-
-    // Invalidate SCU copy of TAG RAMs
-    scu_secure_invalidate(cpu, all_ways);
-
-    // Join SMP
-    scu_join_smp();
-    scu_enable_maintenance_broadcast();
-}
-
 extern void _boot_start();
 void cpu_start_secondary(uint8_t coreNumber)
 {
@@ -87,6 +63,8 @@ void cpu_start_secondary(uint8_t coreNumber)
         HW_SRC_GPR7_WR((uint32_t)&_boot_start);
         HW_SRC_SCR.B.CORE3_ENABLE = 1;
         break;
+    default:
+        break;
     }
 }
 
@@ -125,8 +103,7 @@ int main(void)
         }
         show_xizi_bar();
 
-        int cpu_count = NR_CPU;
-        for (int i = 1; i < cpu_count; i++) {
+        for (int i = 1; i < NR_CPU; i++) {
             // start secondary cpus
             cpu_start_secondary(i);
         }
@@ -143,38 +120,12 @@ int main(void)
     assert(AchieveResourceTag(&scheduler_rights.mmu_driver_tag, &hardkernel_tag, "mmu-ac-resource"));
     assert(AchieveResourceTag(&scheduler_rights.intr_driver_tag, &hardkernel_tag, "intr-ac-resource"));
 
-    struct TraceTag main_icache_tag, main_dcache_tag;
-    AchieveResourceTag(&main_icache_tag, &hardkernel_tag, "icache-ac-resource");
-    AchieveResourceTag(&main_dcache_tag, &hardkernel_tag, "dcache-ac-resource");
-    struct ICacheDone* p_icache_driver = AchieveResource(&main_icache_tag);
-    struct DCacheDone* p_dcache_driver = AchieveResource(&main_dcache_tag);
-
     core_init_done |= (1 << cpu_id);
     LOG_PRINTF("CPU %d init done\n", cpu_id);
     spinlock_unlock(&whole_kernel_lock);
 
     while (core_init_done != (1 << NR_CPU) - 1)
         ;
-    DEBUG_PRINTF("%d", cpu_id);
-
-    // scu_enable();
-    // configure_cpu(cpu_id);
-    // p_dcache_driver->enable();
-    // p_icache_driver->enable();
-
-    // spinlock_lock(&whole_kernel_lock);
-    // p_dcache_driver->flushall();
-    // spinlock_unlock(&whole_kernel_lock);
-
-    // while (true) {
-    //     spinlock_lock(&whole_kernel_lock);
-    //     DEBUG("CPU: %d\n", cpu_id);
-    //     secondary_cpu_load_kern_pgdir(&scheduler_rights.mmu_driver_tag, NULL);
-    //     CLEARTLB(0);
-    //     p_dcache_driver->flushall();
-    //     spinlock_unlock(&whole_kernel_lock);
-    // }
-
     xizi_task_manager.task_scheduler(scheduler_rights);
 
     // never reached
diff --git a/Ubiquitous/XiZi_AIoT/softkernel/syscall/sys_exec.c b/Ubiquitous/XiZi_AIoT/softkernel/syscall/sys_exec.c
index 84d21bc02..4d8f9b613 100644
--- a/Ubiquitous/XiZi_AIoT/softkernel/syscall/sys_exec.c
+++ b/Ubiquitous/XiZi_AIoT/softkernel/syscall/sys_exec.c
@@ -106,7 +106,7 @@ int task_exec(struct TaskMicroDescriptor* task, char* img_start, char* name, cha
         for (int addr_offset = 0; addr_offset < ph.filesz; addr_offset += PAGE_SIZE) {
             uintptr_t page_paddr = xizi_pager.address_translate(&pgdir, ph.vaddr + addr_offset);
             if (page_paddr == 0) {
-                ERROR("copy elf file to unmapped addr");
+                ERROR("copy elf file to unmapped addr\n");
                 goto error_exec;
             }
             uintptr_t read_size = (ph.filesz - addr_offset < PAGE_SIZE ? ph.filesz - addr_offset : PAGE_SIZE);