diff --git a/libcpu/arm/s3c24x0/mmu.c b/libcpu/arm/s3c24x0/mmu.c
index 0cbac7f93428d5861c4154c57ae78a7d5149590e..36b3eb3c9ac31da3649d0abcaec398533a4cfd48 100644
--- a/libcpu/arm/s3c24x0/mmu.c
+++ b/libcpu/arm/s3c24x0/mmu.c
@@ -17,7 +17,7 @@
 #include "s3c24x0.h"
 
 // #define _MMUTT_STARTADDRESS	 0x30080000
-#define _MMUTT_STARTADDRESS	 0x30200000
+#define _MMUTT_STARTADDRESS	 0x30400000
 
 #define DESC_SEC		(0x2|(1<<4))
 #define CB				(3<<2)  //cache_on, write_back
diff --git a/libcpu/arm/s3c24x0/system_clock.c b/libcpu/arm/s3c24x0/system_clock.c
index 38ffa5d23393a9f0d714727939fae74b8ae6674a..bd2a6690db7fd45013ca86be838e8ddbe16f28d9 100644
--- a/libcpu/arm/s3c24x0/system_clock.c
+++ b/libcpu/arm/s3c24x0/system_clock.c
@@ -101,8 +101,8 @@ void rt_hw_set_divider(rt_uint8_t hdivn, rt_uint8_t pdivn)
 void rt_hw_clock_init(void)
 {
 	LOCKTIME = 0xFFFFFFFF;
-	rt_hw_set_divider(HDIVN, PDIVN);
-	rt_hw_set_upll_clock(UPL_SDIV, UPL_PDIV, UPL_MDIV);
 	rt_hw_set_mpll_clock(MPL_SDIV, MPL_PDIV, MPL_MIDV);
+	rt_hw_set_upll_clock(UPL_SDIV, UPL_PDIV, UPL_MDIV);
+	rt_hw_set_divider(HDIVN, PDIVN);
 }
 
diff --git a/libcpu/arm/s3c24x0/trap.c b/libcpu/arm/s3c24x0/trap.c
index 65f47af2428ff55b4cb1a9e04f9f3f3e8ab03560..a8876a54e99dadcddb2ff13dfb4c6a62a25c4845 100644
--- a/libcpu/arm/s3c24x0/trap.c
+++ b/libcpu/arm/s3c24x0/trap.c
@@ -57,8 +57,12 @@ void rt_hw_trap_udef(struct rt_hw_register *regs)
 
 	rt_kprintf("undefined instruction\n");
 	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
-	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);
 
+#ifdef RT_USING_FINSH
+	list_thread();
+#endif
+	while (1);
+	
 	rt_hw_cpu_shutdown();
 }
 
@@ -93,8 +97,12 @@ void rt_hw_trap_pabt(struct rt_hw_register *regs)
 
 	rt_kprintf("prefetch abort\n");
 	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
-	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);
 
+#ifdef RT_USING_FINSH
+	list_thread();
+#endif
+	while (1);
+	
 	rt_hw_cpu_shutdown();
 }
 
@@ -112,8 +120,12 @@ void rt_hw_trap_dabt(struct rt_hw_register *regs)
 
 	rt_kprintf("data abort\n");
 	rt_kprintf("thread - %s stack:\n", rt_current_thread->name);
-	rt_hw_backtrace((rt_uint32_t *)regs->fp, (rt_uint32_t)rt_current_thread->entry);
 
+#ifdef RT_USING_FINSH
+	list_thread();
+#endif
+	while (1);
+	
 	rt_hw_cpu_shutdown();
 }