Merge pull request #4509 from yangjie11/license

[libcpu]update GPL license to Apache-2.0

20 files changed, 40 insertions, 319 deletions

diff --git a/libcpu/arm/am335x/context_iar.S b/libcpu/arm/am335x/context_iar.S
index c53e15a23a..1266d8cf74 100644
--- a/libcpu/arm/am335x/context_iar.S
+++ b/libcpu/arm/am335x/context_iar.S
@@ -1,21 +1,7 @@
 ;/*
-; * File      : context_iar.S
-; * This file is part of RT-Thread RTOS
-; * COPYRIGHT (C) 2006, RT-Thread Development Team
+; * Copyright (c) 2006-2021, 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.
+; * SPDX-License-Identifier: Apache-2.0
 ; *
 ; * Change Logs:
 ; * Date           Author       Notes
diff --git a/libcpu/arm/zynqmp-r5/armv7.h b/libcpu/arm/zynqmp-r5/armv7.h
index 4c34d7da8b..59c97546ec 100644
--- a/libcpu/arm/zynqmp-r5/armv7.h
+++ b/libcpu/arm/zynqmp-r5/armv7.h
@@ -1,23 +1,10 @@
 #ifndef __ARMV7_H__
 #define __ARMV7_H__
 /*
- * COPYRIGHT (C) 2013-2014, Shanghai Real-Thread Technology Co., Ltd
+ * Copyright (c) 2006-2021, RT-Thread Development Team
  *
- *  All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0
  *
- *  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.
  */
 
 #ifndef VFP_DATA_NR
diff --git a/libcpu/c-sky/ck802/contex_ck802_gcc.S b/libcpu/c-sky/ck802/contex_ck802_gcc.S
index 44f2c331dd..a4431b0f74 100644
--- a/libcpu/c-sky/ck802/contex_ck802_gcc.S
+++ b/libcpu/c-sky/ck802/contex_ck802_gcc.S
@@ -1,21 +1,7 @@
 /*
- * File      : contex_ck802.S
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/c-sky/ck802/core_ck802.c b/libcpu/c-sky/ck802/core_ck802.c
index 047c417267..d8cfce09f7 100644
--- a/libcpu/c-sky/ck802/core_ck802.c
+++ b/libcpu/c-sky/ck802/core_ck802.c
@@ -1,21 +1,7 @@
 /*
- * File      : core_ck802.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/c-sky/ck802/core_ck802.h b/libcpu/c-sky/ck802/core_ck802.h
index 6c335f8178..badae8c0ff 100644
--- a/libcpu/c-sky/ck802/core_ck802.h
+++ b/libcpu/c-sky/ck802/core_ck802.h
@@ -1,21 +1,7 @@
 /*
- * File      : core_ck802.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/c-sky/ck802/stack_ck802.c b/libcpu/c-sky/ck802/stack_ck802.c
index 01fed9ad34..087722072e 100644
--- a/libcpu/c-sky/ck802/stack_ck802.c
+++ b/libcpu/c-sky/ck802/stack_ck802.c
@@ -1,21 +1,7 @@
 /*
- * File      : stack_ck802.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2017, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/mips/common/mips_cache.c b/libcpu/mips/common/mips_cache.c
index 8c86bb131a..eb60efaab6 100644
--- a/libcpu/mips/common/mips_cache.c
+++ b/libcpu/mips/common/mips_cache.c
@@ -1,21 +1,7 @@
 /*
- * File      : mips_cache.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/mips/common/mips_cache.h b/libcpu/mips/common/mips_cache.h
index 438dd76cde..b57380ac8e 100644
--- a/libcpu/mips/common/mips_cache.h
+++ b/libcpu/mips/common/mips_cache.h
@@ -1,21 +1,7 @@
 /*
- * File      : mips_cache.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/mips/common/mips_cfg.h b/libcpu/mips/common/mips_cfg.h
index f7e38b4af4..8ffeddb277 100644
--- a/libcpu/mips/common/mips_cfg.h
+++ b/libcpu/mips/common/mips_cfg.h
@@ -1,21 +1,7 @@
 /*
- * File      : mips_cfg.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/mips/common/mips_types.h b/libcpu/mips/common/mips_types.h
index cc12d44391..466a39a40b 100644
--- a/libcpu/mips/common/mips_types.h
+++ b/libcpu/mips/common/mips_types.h
@@ -1,21 +1,7 @@
 /*
- * File      : mips_types.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2008 - 2012, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/context_gcc.S b/libcpu/unicore32/sep6200/context_gcc.S
index 6b958e7f93..9f8e2b8f13 100644
--- a/libcpu/unicore32/sep6200/context_gcc.S
+++ b/libcpu/unicore32/sep6200/context_gcc.S
@@ -1,21 +1,7 @@
 /*
- * File      : context_gcc.S
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/cpu.c b/libcpu/unicore32/sep6200/cpu.c
index 9452b4e59d..a4e07da061 100644
--- a/libcpu/unicore32/sep6200/cpu.c
+++ b/libcpu/unicore32/sep6200/cpu.c
@@ -1,21 +1,7 @@
 /*
- * File      : cpu.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/interrupt.c b/libcpu/unicore32/sep6200/interrupt.c
index 31078320ea..2737849903 100644
--- a/libcpu/unicore32/sep6200/interrupt.c
+++ b/libcpu/unicore32/sep6200/interrupt.c
@@ -1,21 +1,7 @@
 /*
- * File      : interrupt.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/sep6200.h b/libcpu/unicore32/sep6200/sep6200.h
index c09823740b..9aced7fbbb 100644
--- a/libcpu/unicore32/sep6200/sep6200.h
+++ b/libcpu/unicore32/sep6200/sep6200.h
@@ -1,21 +1,7 @@
 /*
- * File      : sep6200.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/serial.c b/libcpu/unicore32/sep6200/serial.c
index 518257b617..9b594d87be 100644
--- a/libcpu/unicore32/sep6200/serial.c
+++ b/libcpu/unicore32/sep6200/serial.c
@@ -1,21 +1,7 @@
 /*
- * File      : serial.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/serial.h b/libcpu/unicore32/sep6200/serial.h
index e626f5e20f..beeceb6165 100644
--- a/libcpu/unicore32/sep6200/serial.h
+++ b/libcpu/unicore32/sep6200/serial.h
@@ -1,21 +1,7 @@
 /*
- * File      : serial.h
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/stack.c b/libcpu/unicore32/sep6200/stack.c
index 722f40835e..71b917c214 100644
--- a/libcpu/unicore32/sep6200/stack.c
+++ b/libcpu/unicore32/sep6200/stack.c
@@ -1,21 +1,7 @@
 /*
- * File      : stack.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/start_gcc.S b/libcpu/unicore32/sep6200/start_gcc.S
index 4dd17aa387..11676e875c 100644
--- a/libcpu/unicore32/sep6200/start_gcc.S
+++ b/libcpu/unicore32/sep6200/start_gcc.S
@@ -1,21 +1,7 @@
 /*
- * File      : start.S
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/trace.c b/libcpu/unicore32/sep6200/trace.c
index 8f11a18a17..d83447c291 100644
--- a/libcpu/unicore32/sep6200/trace.c
+++ b/libcpu/unicore32/sep6200/trace.c
@@ -1,21 +1,7 @@
 /*
- * File      : trace.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes
diff --git a/libcpu/unicore32/sep6200/trap.c b/libcpu/unicore32/sep6200/trap.c
index 1e5d02a279..b7d564aa57 100644
--- a/libcpu/unicore32/sep6200/trap.c
+++ b/libcpu/unicore32/sep6200/trap.c
@@ -1,21 +1,7 @@
 /*
- * File      : trap.c
- * This file is part of RT-Thread RTOS
- * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
+ * Copyright (c) 2006-2021, 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.
+ * SPDX-License-Identifier: Apache-2.0
  *
  * Change Logs:
  * Date           Author       Notes