diff --git a/features/FEATURE_LWIP/lwip-interface/mbed_lib.json b/features/FEATURE_LWIP/lwip-interface/mbed_lib.json
index ef77cf81069..d1e4feff039 100644
--- a/features/FEATURE_LWIP/lwip-interface/mbed_lib.json
+++ b/features/FEATURE_LWIP/lwip-interface/mbed_lib.json
@@ -84,5 +84,10 @@
             "help": "Thread stack size for PPP",
             "value": 768
         }
+    },
+    "target_overrides": {
+        "REALTEK_RTL8195AM": {
+            "tcpip-thread-stacksize": 1600
+        }
     }
 }
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_ARM_STD/rtl8195a_startup.S b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_ARM_STD/rtl8195a_startup.S
new file mode 100644
index 00000000000..c184bdff725
--- /dev/null
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_ARM_STD/rtl8195a_startup.S
@@ -0,0 +1,31 @@
+;
+; Copyright (c) 2017 Realtek Semiconductor Corp.
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+;     http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
+            PRESERVE8
+            THUMB
+
+            AREA    |i.PLAT_Start|, CODE, READONLY
+
+PLAT_Start  PROC
+
+            EXPORT  PLAT_Start
+    IMPORT  |Image$$ARM_LIB_STACK$$ZI$$Limit|
+    IMPORT  PLAT_Init
+            LDR     SP, =|Image$$ARM_LIB_STACK$$ZI$$Limit|
+            LDR     R0, =PLAT_Init
+            BX      R0
+            ENDP
+            ALIGN
+            END
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/rtl8195a_startup.S b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/rtl8195a_startup.S
new file mode 100644
index 00000000000..219265a5083
--- /dev/null
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_GCC_ARM/rtl8195a_startup.S
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2017 Realtek Semiconductor Corp.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+    .syntax unified
+    .thumb
+
+    .global  __StackTop
+    .global  PLAT_Init
+
+    /* entry point of application image */
+    .section  .text.PLAT_Start
+    .weak  PLAT_Start
+    .type  PLAT_Start, %function
+PLAT_Start:
+    ldr   sp, =__StackTop
+    ldr   r0, =PLAT_Init
+    bx    r0
+    .size  PLAT_Start, .-PLAT_Start
+    .end
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_IAR/rtl8195a_startup.S b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_IAR/rtl8195a_startup.S
new file mode 100644
index 00000000000..4e00f35c3db
--- /dev/null
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/TOOLCHAIN_IAR/rtl8195a_startup.S
@@ -0,0 +1,31 @@
+;
+; Copyright (c) 2017 Realtek Semiconductor Corp.
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+;     http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+
+    MODULE  ?cstartup
+
+    SECTION .text:CODE:NOROOT:REORDER(2)
+    EXTERN  CSTACK$$Limit
+    EXTERN  PLAT_Init
+
+    ; Default image 2 entry
+    THUMB
+    PUBWEAK PLAT_Start
+
+PLAT_Start
+    LDR     SP, =CSTACK$$Limit
+    LDR     R0, =PLAT_Init
+    BX      R0
+
+    END
diff --git a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_init.c b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_init.c
index 9e1faafe2f3..b15099d5791 100644
--- a/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_init.c
+++ b/targets/TARGET_Realtek/TARGET_AMEBA/TARGET_RTL8195A/device/rtl8195a_init.c
@@ -40,13 +40,11 @@ extern uint8_t Image$$RW_DRAM2$$ZI$$Limit[];
 #define __bss_dtcm_end__   Image$$TCM_OVERLAY$$ZI$$Limit
 #define __bss_dram_start__ Image$$RW_DRAM2$$ZI$$Base
 #define __bss_dram_end__   Image$$RW_DRAM2$$ZI$$Limit
-#define __stackp           Image$$ARM_LIB_STACK$$ZI$$Limit
 
 #elif defined (__ICCARM__)
 
 #pragma section=".ram.bss"
 
-extern uint32_t CSTACK$$Limit;
 uint8_t *__bss_start__;
 uint8_t *__bss_end__;
 
@@ -55,12 +53,9 @@ void __iar_data_init_app(void)
     __bss_start__ = (uint8_t *)__section_begin(".ram.bss");
     __bss_end__   = (uint8_t *)__section_end(".ram.bss");
 }
-#define __stackp           CSTACK$$Limit
 
 #else
 
-extern uint32_t __StackTop;
-extern uint32_t __StackLimit;
 extern uint8_t __bss_sram_start__[];
 extern uint8_t __bss_sram_end__[];
 extern uint8_t __bss_dtcm_start__[];
@@ -68,7 +63,6 @@ extern uint8_t __bss_dtcm_end__[];
 extern uint8_t __bss_dram_start__[];
 extern uint8_t __bss_dram_end__[];
 
-#define __stackp           __StackTop
 #endif
 
 extern VECTOR_Func NewVectorTable[];
@@ -173,16 +167,19 @@ void TRAP_HardFaultHandler_Patch(void)
 
 extern _LONG_CALL_ void * __rtl_memset_v1_00(void * m , int c , size_t n);
 // Image2 Entry Function
-void PLAT_Start(void)
+void PLAT_Init(void)
 {
     uint32_t val;
 
-#if defined (__ICCARM__)
-    __iar_data_init_app();
+    // Overwrite vector table
+    NewVectorTable[2] = (VECTOR_Func) TRAP_NMIHandler;
+#if defined ( __ICCARM__ )
+    NewVectorTable[3] = (VECTOR_Func) TRAP_HardFaultHandler_Patch;
 #endif
 
     // Clear RAM BSS
 #if defined (__ICCARM__)
+    __iar_data_init_app();
     __rtl_memset_v1_00((void *)__bss_start__, 0, __bss_end__ - __bss_start__);
 #else
     __rtl_memset_v1_00((void *)__bss_sram_start__, 0, __bss_sram_end__ - __bss_sram_start__);
@@ -190,14 +187,6 @@ void PLAT_Start(void)
     __rtl_memset_v1_00((void *)__bss_dram_start__, 0, __bss_dram_end__ - __bss_dram_start__);
 #endif
 
-    // Set MSP
-    __set_MSP((uint32_t)&__stackp - 0x100);
-    // Overwrite vector table
-    NewVectorTable[2] = (VECTOR_Func) TRAP_NMIHandler;
-#if defined ( __ICCARM__ )
-    NewVectorTable[3] = (VECTOR_Func) TRAP_HardFaultHandler_Patch;
-#endif
-
     extern HAL_TIMER_OP_EXT HalTimerOpExt;
     __rtl_memset_v1_00((void *)&HalTimerOpExt, 0, sizeof(HalTimerOpExt));
     __rtl_memset_v1_00((void *)&HalTimerOp, 0, sizeof(HalTimerOp));