Cleanup and add licencse

11 files changed, 190 insertions, 247 deletions

diff --git a/libcpu/unicore32/sep6200/clk.c b/libcpu/unicore32/sep6200/clk.c
deleted file mode 100644
index f31bd6b694..0000000000
--- a/libcpu/unicore32/sep6200/clk.c
+++ /dev/null
@@ -1,164 +0,0 @@
-/*
- * File      : clock.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
- *
- * Change Logs:
- * Date           Author       Notes
- * 2013-7-16      Peng Fan     Just put the file here, should be implemented in
- *                             future
- */
-
-#include <rtthread.h>
-#include <sep6200.h>
-
-#define PLL_CFG(_f, _r) {.f = _f, .r = _r} /*f(frequency, MHz); r(config register value)*/
-#define MHz	1000000UL
-/*
-*SEP0611_CLOCK
-*├── APLL
-*│   └── CPU
-*├── DPLL
-*│   └── DDR
-*└── MPLL
-*    └── BUS1
-*        ├── BUS2
-*        │   ├── DMAC1
-*        │   ├── ESRAM
-*        │   ├── LCDC
-*        │   ├── NAND
-*        │   ├── NOR
-*        │   ├── SDIO1
-*        │   ├── SDIO2
-*        │   └── VPU
-*        ├── BUS3
-*        │   ├── BUS5
-*        │   │   ├── I2C1
-*        │   │   ├── I2C2
-*        │   │   ├── I2C3
-*        │   │   ├── I2S
-*        │   │   ├── SPI1
-*        │   │   ├── SPI2
-*        │   │   ├── SPI3
-*        │   │   ├── UART1
-*        │   │   ├── UART2
-*        │   │   ├── UART3
-*        │   │   └── UART4
-*        │   ├── DMAC2
-*        │   ├── GPU
-*        │   └── USB
-*        ├── BUS4
-*        │   ├── GPIO
-*        │   ├── GPSCTRL
-*        │   ├── PWM
-*        │   ├── RTC
-*        │   ├── SYSCTRL
-*        │   ├── TIMER
-*        │   └── VIC
-*        ├── DS1_2
-*        ├── DS1_3
-*        └── GPS
-*/
-
-enum sep0611_clk_gate{
-  DDRC = 0, BUS1, BUS2, BUS3, DS1_2,
-  DS1_3, USBC, DMAC1, NAND, DMAC2,
-  ESRAM, SDIO1, SDIO2, GPU, VPU,
-  BUS4, BUS5, VIC_, SYSCTRL, PRTC,
-  TIMER, GPSCTRL, GPIO, LCDC2HDMI, DDRPHY,
-  UART1, UART2, UART3, UART4, SPI1,
-  SPI2, SPI3,
-
-  I2C1 = 32, I2C2, I2C3, I2S, PWM,
-  H2X, LCDC, NOR, GPSHCLK, GPS,
-};
-
-typedef struct {
-	unsigned long f;
-	unsigned long r;
-}pll_t;
-
-static pll_t apll_tab[] = {
-  PLL_CFG(800*MHz, 0x00010810),
-};
-
-static pll_t mpll_tab[] = {
-  PLL_CFG(480*MHz, 0x00013C12),   // 480MHz
-};
-
-static pll_t dpll_tab[] = {
-  PLL_CFG(400*MHz, 0x00010812),   // 402MHz
-};
-
-static void rt_hw_set_system_clock(void)
-{
-  /*apll, mpll, dpll is set in uboot when system boots up*/
-}
-
-static void rt_hw_set_usb_clock(void)
-{
-
-}
-
-static void rt_hw_set_peripheral_clock(void)
-{
-
-}
-/**
- * @brief System Clock Configuration
- */
-/* apll mpll dpll should be set in u-boot, Here just set clock
- * of the pherial
- */
-void rt_hw_set_apll_clock(void)
-{
-
-}
-void rt_hw_set_mpll_clock(void)
-{
-
-}
-void rt_hw_set_dpll_clock(void)
-{
-
-}
-void rt_hw_clock_init(void)
-{
-	/* set system clock */
-	rt_hw_set_system_clock();
-}
-
-/**
- * @brief Get system clock
- */
-rt_uint32_t rt_hw_get_clock(void)
-{
-}
-
-/**
- * @brief Enable module clock
- */
-void rt_hw_enable_module_clock(rt_uint8_t module)
-{
-  if (module >= 32) {
-    write_reg(SEP6200_PMU_CLK_GT_CFG2, (1 << (module - 32)) | read_reg(SEP6200_PMU_CLK_GT_CFG2));
-  } else {
-    write_reg(SEP6200_PMU_CLK_GT_CFG1, (1 << module) | read_reg(SEP6200_PMU_CLK_GT_CFG1));
-  }
-}
-
-/**
- * @brief Disable module clock
- */
-void rt_hw_disable_module_clock(rt_uint8_t module)
-{
-  if (module >= 32) {
-    write_reg(SEP6200_PMU_CLK_GT_CFG2, ~(1 << (module - 32)) & read_reg(SEP6200_PMU_CLK_GT_CFG2));
-  } else {
-    write_reg(SEP6200_PMU_CLK_GT_CFG1, ~(1 << module) & read_reg(SEP6200_PMU_CLK_GT_CFG1));
-  }
-}
diff --git a/libcpu/unicore32/sep6200/context_gcc.S b/libcpu/unicore32/sep6200/context_gcc.S
index dd75084061..6b958e7f93 100644
--- a/libcpu/unicore32/sep6200/context_gcc.S
+++ b/libcpu/unicore32/sep6200/context_gcc.S
@@ -1,20 +1,31 @@
 /*
- * File      : context.S
+ * File      : context_gcc.S
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
- * 2013-7-14      Peng Fan     First implementation
+ * 2013-7-14      Peng Fan     sep6200 implementation
  */
 
-/*!
+/**
  * \addtogroup sep6200
  */
+
 /*@{*/
 
 #define NOINT			0xc0
diff --git a/libcpu/unicore32/sep6200/cpu.c b/libcpu/unicore32/sep6200/cpu.c
index 969a804169..ebea8750e1 100644
--- a/libcpu/unicore32/sep6200/cpu.c
+++ b/libcpu/unicore32/sep6200/cpu.c
@@ -1,15 +1,25 @@
 /*
  * File      : cpu.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Develop Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
- * 2013-7-14      Peng Fan     first implementation
+ * 2013-7-14      Peng Fan     sep6200 implementation
  */
 
 #include <rthw.h>
diff --git a/libcpu/unicore32/sep6200/interrupt.c b/libcpu/unicore32/sep6200/interrupt.c
index dbfd529786..5d088f788a 100644
--- a/libcpu/unicore32/sep6200/interrupt.c
+++ b/libcpu/unicore32/sep6200/interrupt.c
@@ -1,15 +1,25 @@
 /*
  * File      : interrupt.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
- * 2013-7-14      Peng Fan     First implementation
+ * 2013-7-14      Peng Fan     sep6200 implementation
  */
 
 #include <rtthread.h>
diff --git a/libcpu/unicore32/sep6200/sep6200.h b/libcpu/unicore32/sep6200/sep6200.h
index 01c6b8b548..c09823740b 100644
--- a/libcpu/unicore32/sep6200/sep6200.h
+++ b/libcpu/unicore32/sep6200/sep6200.h
@@ -1,3 +1,27 @@
+/*
+ * File      : sep6200.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2013-7-17      Peng Fan     sep6200 implementation
+ */
+
 #ifndef __SEP6200_H
 #define __SEP6200_H
 
diff --git a/libcpu/unicore32/sep6200/serial.c b/libcpu/unicore32/sep6200/serial.c
index aeb9d69490..4be71127de 100644
--- a/libcpu/unicore32/sep6200/serial.c
+++ b/libcpu/unicore32/sep6200/serial.c
@@ -1,11 +1,21 @@
 /*
  * File      : serial.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
@@ -16,7 +26,7 @@
 #include "serial.h"
 
 /**
- * @addtogroup SEP6200
+ * @addtogroup sep6200
  */
 /*@{*/
 
diff --git a/libcpu/unicore32/sep6200/serial.h b/libcpu/unicore32/sep6200/serial.h
index 7d06741a56..e626f5e20f 100644
--- a/libcpu/unicore32/sep6200/serial.h
+++ b/libcpu/unicore32/sep6200/serial.h
@@ -1,11 +1,21 @@
 /*
- * File      : serial.c
+ * File      : serial.h
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/stack.c b/libcpu/unicore32/sep6200/stack.c
index f6e6399674..722f40835e 100644
--- a/libcpu/unicore32/sep6200/stack.c
+++ b/libcpu/unicore32/sep6200/stack.c
@@ -1,15 +1,25 @@
 /*
  * File      : stack.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
- * 2013-7-14      Peng Fan     Modifiled from sep4020
+ * 2013-7-14      Peng Fan     sep6200 implementation
  */
 
 #include <rtthread.h>
diff --git a/libcpu/unicore32/sep6200/start_gcc.S b/libcpu/unicore32/sep6200/start_gcc.S
index c7aeaa135a..4dd17aa387 100644
--- a/libcpu/unicore32/sep6200/start_gcc.S
+++ b/libcpu/unicore32/sep6200/start_gcc.S
@@ -1,11 +1,21 @@
 /*
  * File      : start.S
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http:/*openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes
@@ -61,10 +71,6 @@
 .equ 	MODEMASK,			0x1f
 .equ 	NOINT,				0xc0
 
-.equ 	RAM_BASE,			0x00000000	/*Start address of RAM		*/
-
-
-
 /*
  *************************************************************************
  *
@@ -127,13 +133,12 @@ _bss_end:
 
 .globl IRQ_STACK_START
 IRQ_STACK_START:
-    .word   _irq_stack_start + 10240 - 4
+    .word   _irq_stack_start + 1024
 
 .globl FIQ_STACK_START
 FIQ_STACK_START:
      .word   _fiq_stack_start +1024
 
-/*peng not sure*/
 .globl UNDEFINED_STACK_START
 UNDEFINED_STACK_START:
 	.word _undefined_stack_start + CONFIG_STACKSIZE
@@ -144,7 +149,7 @@ ABORT_STACK_START:
 
 .globl _STACK_START
 _STACK_START:
-	.word _priv_stack_start + 40960 - 4
+	.word _priv_stack_start + 4096
 
 .equ  SEP6200_VIC_BASE,		 0xb0000000
 .equ  SEP6200_SYSCTL_BASE,	 0xb0008000
@@ -176,6 +181,7 @@ reset:
 	/* setup stack */
 	b.l		stack_setup
 
+  /* copy the vector code to address 0 */
 	ldw	r12, =0x100
 	ldw	r0, = 0x40000000
 	ldw	r1, = 0x00000000
@@ -220,7 +226,7 @@ ctor_end:
 	andn 	r1, r0, #NOINT
 	mov.a 	asr, r1
 
-	/* start RT-Thread Kernel 		*/
+	/* start RT-Thread Kernel */
 	ldw		pc, _rtthread_startup
 
 _rtthread_startup:
@@ -235,18 +241,18 @@ _rtthread_startup:
  */
 
 /* exception handlers */
-/*Just simple implementation here peng*/
+/*Just simple implementation here */
 	.align  5
 extend_handle:
-    b extend_handle
+    b rt_hw_trap_extn
 swi_handle:
-    b swi_handle
+    b rt_hw_trap_swi
 iabort_handle:
-    b iabort_handle
+    b rt_hw_trap_pabt
 dabort_handle:
-    b dabort_handle
+    b rt_hw_trap_dabt
 reserve_handle:
-    b reserve_handle
+    b rt_hw_trap_resv
 
 .globl 		rt_interrupt_enter
 .globl 		rt_interrupt_leave
@@ -276,9 +282,7 @@ IRQ_handle:
 
 	.align	5
 FIQ_handle:
-    mov r0, #0x44
-    b.l printhex
-	mov pc, lr
+  b rt_hw_trap_fiq
 
 _interrupt_thread_switch:
 
@@ -290,21 +294,12 @@ _interrupt_thread_switch:
   ldm.w (r16 - r28), [sp]+
   ldm.w (lr), [sp]+
 
-	stm.w	(r0-r3), [sp-] /*save r0-r3*/
+	stm.w	(r0 - r3), [sp-] /*save r0-r3*/
 
 	mov		r1,  sp
 	add		sp,  sp, #16 /* restore sp */
 	mov		r2,  lr	/* save old task's pc to r2 */
 
-#if 0
-	mov		r3,  bsr /* disable interrupt */
-	/*or		r0,  r3, #NOINT*/
-	mov.a		bsr, r3
-
-	ldw	r0,  =.+8 /* switch to interrupted task's stack */
-	mov.a	pc,  r0 /*switch bsr to asr, irq to priv mode*/
-
-#endif
   mov r3, bsr
   mov r0, #0xd3 /*I:F:0:PRIV*/
   mov.a asr, r0
@@ -312,23 +307,24 @@ _interrupt_thread_switch:
 	stm.w	(r2), [sp-] /* push old task's pc */
 
 	/* push old task's registers */
-	stm.w	(r16, r17, r18, r19, r20, r21, r22, r23, r24, r25, r26, r27, r28, lr), [sp-]
-	stm.w	(r4, r5, r6, r7, r8, r9, r10, r11, r12, r13, r14, r15), [sp-]
+  stm.w (lr), [sp-]
+  stm.w (r16 - r28), [sp-]
+  stm.w (r4 - r15), [sp-]
 	mov		r4,  r1	/* Special optimised code below		*/
-  mov		r5,  r3 /*pengpengpengpeng*/
-	ldm.w	(r0,r1, r2, r3), [r4]+
-	stm.w	(r0, r1, r2, r3), [sp-] /*push old task's r3-r0*/
+  mov		r5,  r3
+  ldm.w (r0 - r3), [r4]+
+  stm.w (r0 - r3), [sp-] /*push old task's r3-r0*/
 	stm.w	(r5),	 [sp-] /* push old task's asr */
-	mov	r4,  bsr
-	stm.w   (r4), [sp-]	/* push old task's bsr I am not sure peng*/
+	mov	r4, bsr
+	stm.w (r4), [sp-]	/* push old task's bsr*/
 
 	ldw		r4,  =rt_interrupt_from_thread
 	ldw		r5,  [r4+]
-	stw		sp,  [r5+]				/* store sp in preempted tasks's TCB*/
+	stw		sp,  [r5+] /* store sp in preempted tasks's TCB*/
 
 	ldw	r6,  =rt_interrupt_to_thread
 	ldw	r6,  [r6+]
-	ldw	sp,  [r6+]	/* get new task's stack pointer	*/
+	ldw	sp,  [r6+] /* get new task's stack pointer	*/
 
 	ldm.w	(r4), [sp]+	/* pop new task's spsr				*/
 	mov.a	bsr, r4
@@ -340,14 +336,7 @@ _interrupt_thread_switch:
   ldm.w (r0 - r15), [sp]+
   ldm.w (r16 - r28), [sp]+
   ldm.w (lr), [sp]+
-  /*peng*/
   ldm.w (pc), [sp]+
-#if 0
-  mov r0, lr
-  b.l printhex
-  ldm.w (r0), [sp]+
-  b.l printhex
-#endif
 
 stack_setup:
 	/*irq*/
diff --git a/libcpu/unicore32/sep6200/trace.c b/libcpu/unicore32/sep6200/trace.c
index b842e5dd56..8f11a18a17 100644
--- a/libcpu/unicore32/sep6200/trace.c
+++ b/libcpu/unicore32/sep6200/trace.c
@@ -1,3 +1,26 @@
+/*
+ * File      : trace.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2017-07-17     Peng Fan     sep6200 implementation
+ */
 #include <rtthread.h>
 
 void rt_hw_backtrace(rt_uint32_t *fp, rt_uint32_t thread_entry)
diff --git a/libcpu/unicore32/sep6200/trap.c b/libcpu/unicore32/sep6200/trap.c
index 22689c42eb..1e5d02a279 100644
--- a/libcpu/unicore32/sep6200/trap.c
+++ b/libcpu/unicore32/sep6200/trap.c
@@ -1,11 +1,21 @@
 /*
  * File      : trap.c
  * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006, RT-Thread Development Team
+ * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
  *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://openlab.rt-thread.com/license/LICENSE
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Change Logs:
  * Date           Author       Notes