diff --git a/arch/arm/include/armv8-m/irq.h b/arch/arm/include/armv8-m/irq.h
index 69051ef71d..20eaff315c 100755
--- a/arch/arm/include/armv8-m/irq.h
+++ b/arch/arm/include/armv8-m/irq.h
@@ -49,6 +49,7 @@
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
+
 /* Configuration ************************************************************/
 
 /* If this is a kernel build, how many nested system calls should we
@@ -242,7 +243,6 @@ static inline void setbasepri(uint32_t basepri)
       : "memory");
 }
 
-
 #  define raisebasepri(b) setbasepri(b);
 
 /* Disable IRQs */
diff --git a/arch/arm/include/irq.h b/arch/arm/include/irq.h
index 97d1556abe..00d7a5beb6 100644
--- a/arch/arm/include/irq.h
+++ b/arch/arm/include/irq.h
@@ -1,36 +1,20 @@
 /****************************************************************************
  * arch/arm/include/irq.h
  *
- *   Copyright (C) 2007-2009, 2011, 2015, 2019 Gregory Nutt. All rights
- *     reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * 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.
  *
  ****************************************************************************/
 
diff --git a/arch/arm/include/syscall.h b/arch/arm/include/syscall.h
index 69d7cae0d1..df364e5d7d 100644
--- a/arch/arm/include/syscall.h
+++ b/arch/arm/include/syscall.h
@@ -1,35 +1,20 @@
 /****************************************************************************
  * arch/arm/include/syscall.h
  *
- *   Copyright (C) 2011, 2019 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * 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.
  *
  ****************************************************************************/
 
diff --git a/arch/arm/include/types.h b/arch/arm/include/types.h
index dda8c40fcd..fd804a87ce 100644
--- a/arch/arm/include/types.h
+++ b/arch/arm/include/types.h
@@ -1,35 +1,20 @@
 /****************************************************************************
  * arch/arm/include/types.h
  *
- *   Copyright (C) 2007-2009, 2016 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * 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.
  *
  ****************************************************************************/
 
@@ -98,9 +83,9 @@ typedef signed int         _ssize_t;
 typedef unsigned int       _size_t;
 #endif
 
-/* This is the size of the interrupt state save returned by up_irq_save().  For
- * ARM, a 32 register value is returned, for the thumb2, Cortex-M3, the 16-bit
- * primask register value is returned,
+/* This is the size of the interrupt state save returned by up_irq_save().
+ * For ARM, a 32 register value is returned, for the thumb2, Cortex-M3, the
+ * 16-bit primask register value is returned,
  */
 
 #ifdef __thumb2__
diff --git a/arch/arm/src/armv8-m/dwt.h b/arch/arm/src/armv8-m/dwt.h
index 7df90d7440..a083ece54e 100755
--- a/arch/arm/src/armv8-m/dwt.h
+++ b/arch/arm/src/armv8-m/dwt.h
@@ -1,4 +1,4 @@
-/***************************************************************************************
+/***********************************************************************************************
  * arch/arm/src/armv8-m/dwt.h
  *
  *   Copyright (c) 2009 - 2013 ARM LIMITED
diff --git a/arch/arm/src/armv8-m/etm.h b/arch/arm/src/armv8-m/etm.h
index af8d4e7215..4882c51270 100755
--- a/arch/arm/src/armv8-m/etm.h
+++ b/arch/arm/src/armv8-m/etm.h
@@ -68,6 +68,7 @@
 /*******************************************************************************************************************************
  * Pre-processor Definitions
  *******************************************************************************************************************************/
+
 /* ETM Register Base Address ***************************************************************************************************/
 
 #define ETM_BASE                                      (0xe0041000ul)
diff --git a/arch/arm/src/armv8-m/fpb.h b/arch/arm/src/armv8-m/fpb.h
index afe51132d5..6a01bb4f84 100755
--- a/arch/arm/src/armv8-m/fpb.h
+++ b/arch/arm/src/armv8-m/fpb.h
@@ -21,17 +21,17 @@
 #ifndef __ARCH_ARM_SRC_ARMV8-M_FPB_H
 #define __ARCH_ARM_SRC_ARMV8-M_FPB_H
 
-/******************************************************************************
+/****************************************************************************
  * Pre-processor Definitions
- ******************************************************************************/
+ ****************************************************************************/
 
-/* Flash Patch and Breakpoint Unit FPB ***************************************/
+/* Flash Patch and Breakpoint Unit FPB **************************************/
 
-/* FPB Register Base Address *************************************************/
+/* FPB Register Base Address ************************************************/
 
 #define FPB_BASE                  0xe0002000
 
-/* FPB Register Offsets *******************************************************/
+/* FPB Register Offsets *****************************************************/
 
 #define FPB_CTRL_OFFSET       0x0000  /* Control */
 #define FPB_REMAP_OFFSET      0x0004  /* Remap */
@@ -44,7 +44,7 @@
 #define FPB_COMP6_OFFSET      0x0020  /* Comparator 6 */
 #define FPB_COMP7_OFFSET      0x0024  /* Comparator 7 */
 
-/* FPB Register Addresses *****************************************************/
+/* FPB Register Addresses ***************************************************/
 
 #define FPB_CTRL              (FPB_BASE + FPB_CTRL_OFFSET)
 #define FPB_REMAP             (FPB_BASE + FPB_REMAP_OFFSET)
@@ -57,7 +57,7 @@
 #define FPB_COMP6             (FPB_BASE + FPB_COMP6_OFFSET)
 #define FPB_COMP7             (FPB_BASE + FPB_COMP7_OFFSET
 
-/* FPB Register Bitfield Definitions ******************************************/
+/* FPB Register Bitfield Definitions ****************************************/
 
 /* FPB_CTRL */
 
diff --git a/arch/arm/src/armv8-m/itm.h b/arch/arm/src/armv8-m/itm.h
index f3a9217a46..e0d6bdb4f6 100755
--- a/arch/arm/src/armv8-m/itm.h
+++ b/arch/arm/src/armv8-m/itm.h
@@ -74,6 +74,7 @@
  ***********************************************************************************************/
 
 /* Instrumentation Trace Macrocell Register (ITM) Definitions **********************************/
+
 /* ITM Register Base Address *******************************************************************/
 
 #define ITM_BASE                 (0xe0000000ul)
diff --git a/arch/arm/src/armv8-m/itm_syslog.h b/arch/arm/src/armv8-m/itm_syslog.h
index 88f70e331e..65f6dc8953 100755
--- a/arch/arm/src/armv8-m/itm_syslog.h
+++ b/arch/arm/src/armv8-m/itm_syslog.h
@@ -39,7 +39,7 @@
 #define __ARCH_ARM_SRC_ARMV8_M_ITM_SYSLOG_H
 
 /****************************************************************************
- * Public Functions
+ * Public Function Prototypes
  ****************************************************************************/
 
 /****************************************************************************
diff --git a/arch/arm/src/armv8-m/nvic.h b/arch/arm/src/armv8-m/nvic.h
index bfcb69de4f..b4b71ce07a 100755
--- a/arch/arm/src/armv8-m/nvic.h
+++ b/arch/arm/src/armv8-m/nvic.h
@@ -34,6 +34,7 @@
 /* Exception/interrupt vector numbers *******************************************************/
 
                                                /* Vector  0: Reset stack pointer value */
+
                                                /* Vector  1: Reset */
 #define NVIC_IRQ_NMI                    (2)    /* Vector  2: Non-Maskable Interrupt (NMI) */
 #define NVIC_IRQ_HARDFAULT              (3)    /* Vector  3: Hard fault */
diff --git a/arch/arm/src/armv8-m/up_itm.c b/arch/arm/src/armv8-m/up_itm.c
index 8e5dcbc34b..208c2dda58 100755
--- a/arch/arm/src/armv8-m/up_itm.c
+++ b/arch/arm/src/armv8-m/up_itm.c
@@ -5,7 +5,8 @@
  *
  *  All rights reserved.
  *  Redistribution and use in source and binary forms, with or without
- *  modification, are permitted provided that the following conditions are met:
+ *  modification, are permitted provided that the following conditions are
+ *  met:
  *  - Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  - Redistributions in binary form must reproduce the above copyright
@@ -14,18 +15,18 @@
  *  - Neither the name of ARM nor the names of its contributors may be used
  *    to endorse or promote products derived from this software without
  *    specific prior written permission.
- *  *
- *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- *  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- *  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- *  ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS AND CONTRIBUTORS BE
- *  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- *  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- *  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- *  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- *  POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ *  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ *  TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ *  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS
+ *  AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ *  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ *  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  *   Copyright (C) 2014 Pierre-noel Bouteville . All rights reserved.
  *   Copyright (C) 2014 Gregory Nutt. All rights reserved.
diff --git a/arch/arm/src/armv8-m/up_stackcheck.c b/arch/arm/src/armv8-m/up_stackcheck.c
index 462c577767..e879149034 100755
--- a/arch/arm/src/armv8-m/up_stackcheck.c
+++ b/arch/arm/src/armv8-m/up_stackcheck.c
@@ -55,9 +55,12 @@
  * Private Functions
  ****************************************************************************/
 
-void    __cyg_profile_func_enter(void *func, void *caller) __attribute__((naked, no_instrument_function));
-void    __cyg_profile_func_exit(void *func, void *caller)  __attribute__((naked, no_instrument_function));
-void    __stack_overflow_trap(void) __attribute__((naked, no_instrument_function));
+void  __cyg_profile_func_enter(void *func, void *caller)
+  __attribute__((naked, no_instrument_function));
+void  __cyg_profile_func_exit(void *func, void *caller)
+  __attribute__((naked, no_instrument_function));
+void  __stack_overflow_trap(void)
+  __attribute__((naked, no_instrument_function));
 
 /****************************************************************************
  * Name: __stack_overflow_trap
@@ -70,6 +73,7 @@ void __stack_overflow_trap(void)
   uint32_t regval;
 
   /* force hard fault */
+
   regval  = getreg32(NVIC_INTCTRL);
   regval |= NVIC_INTCTRL_NMIPENDSET;
   putreg32(regval, NVIC_INTCTRL);
diff --git a/arch/arm/src/armv8-m/up_systick.c b/arch/arm/src/armv8-m/up_systick.c
index 2649c813c9..79285cf2d7 100755
--- a/arch/arm/src/armv8-m/up_systick.c
+++ b/arch/arm/src/armv8-m/up_systick.c
@@ -265,7 +265,8 @@ static int systick_interrupt(int irq, FAR void *context, FAR void *arg)
 struct timer_lowerhalf_s *systick_initialize(bool coreclk,
                                              unsigned int freq, int minor)
 {
-  struct systick_lowerhalf_s *lower = (struct systick_lowerhalf_s *)&g_systick_lower;
+  struct systick_lowerhalf_s *lower =
+    (struct systick_lowerhalf_s *)&g_systick_lower;
 
   /* Calculate the working clock frequency if need */
 
@@ -284,7 +285,8 @@ struct timer_lowerhalf_s *systick_initialize(bool coreclk,
 
   if (coreclk)
     {
-      putreg32(NVIC_SYSTICK_CTRL_CLKSOURCE | NVIC_SYSTICK_CTRL_TICKINT, NVIC_SYSTICK_CTRL);
+      putreg32(NVIC_SYSTICK_CTRL_CLKSOURCE | NVIC_SYSTICK_CTRL_TICKINT,
+               NVIC_SYSTICK_CTRL);
     }
   else
     {
diff --git a/arch/arm/src/armv8-m/up_vectors.c b/arch/arm/src/armv8-m/up_vectors.c
index e2caef9b00..04d2a6f8d1 100755
--- a/arch/arm/src/armv8-m/up_vectors.c
+++ b/arch/arm/src/armv8-m/up_vectors.c
@@ -41,9 +41,9 @@
 #include "chip.h"
 #include "up_internal.h"
 
-/************************************************************************************
+/****************************************************************************
  * Pre-processor Definitions
- ************************************************************************************/
+ ****************************************************************************/
 
 #define IDLE_STACK      ((unsigned)&_ebss+CONFIG_IDLETHREAD_STACKSIZE-4)
 
@@ -63,17 +63,17 @@ extern void __start(void);
 
 extern void exception_common(void);
 
-/************************************************************************************
+/****************************************************************************
  * Public data
- ************************************************************************************/
+ ****************************************************************************/
 
-/* The v7m vector table consists of an array of function pointers, with the first
- * slot (vector zero) used to hold the initial stack pointer.
+/* The v7m vector table consists of an array of function pointers, with the
+ * first slot (vector zero) used to hold the initial stack pointer.
  *
- * As all exceptions (interrupts) are routed via exception_common, we just need to
- * fill this array with pointers to it.
+ * As all exceptions (interrupts) are routed via exception_common, we just
+ * need to fill this array with pointers to it.
  *
- * Note that the [ ... ] designated initialiser is a GCC extension.
+ * Note that the [ ... ] designated initializer is a GCC extension.
  */
 
 unsigned _vectors[] __attribute__((section(".vectors"))) =
diff --git a/arch/arm/src/common/up_internal.h b/arch/arm/src/common/up_internal.h
index b262b0f6d4..745be3422a 100644
--- a/arch/arm/src/common/up_internal.h
+++ b/arch/arm/src/common/up_internal.h
@@ -1,35 +1,20 @@
 /****************************************************************************
  * common/up_internal.h
  *
- *   Copyright (C) 2007-2015, 2018-2019 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you 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
  *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
+ *   http://www.apache.org/licenses/LICENSE-2.0
  *
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in
- *    the documentation and/or other materials provided with the
- *    distribution.
- * 3. Neither the name NuttX nor the names of its contributors may be
- *    used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
- * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
- * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
+ * 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.
  *
  ****************************************************************************/
 
@@ -97,7 +82,8 @@
  * some configurations.
  */
 
-#if defined(CONFIG_ARCH_CORTEXM0) || defined(CONFIG_ARCH_ARMV7M) || defined(CONFIG_ARCH_ARMV8M)
+#if defined(CONFIG_ARCH_CORTEXM0) || defined(CONFIG_ARCH_ARMV7M) || \
+    defined(CONFIG_ARCH_ARMV8M)
 
   /* If the floating point unit is present and enabled, then save the
    * floating point registers as well as normal ARM registers.  This only
@@ -129,7 +115,8 @@
 #  define up_restorestate(regs) (CURRENT_REGS = regs)
 
 /* Otherwise, for the ARM7 and ARM9.  The state is copied in full from stack
- * to stack.  This is not very efficient and should be fixed to match Cortex-A5.
+ * to stack.  This is not very efficient and should be fixed to match
+ * Cortex-A5.
  */
 
 #else
@@ -234,14 +221,14 @@ EXTERN uint32_t g_intstackalloc; /* Allocated stack base */
 EXTERN uint32_t g_intstackbase;  /* Initial top of interrupt stack */
 #endif
 
-/* These 'addresses' of these values are setup by the linker script.  They are
- * not actual uint32_t storage locations! They are only used meaningfully in the
- * following way:
+/* These 'addresses' of these values are setup by the linker script.  They
+ * are not actual uint32_t storage locations! They are only used
+ * meaningfully in the following way:
  *
  *  - The linker script defines, for example, the symbol_sdata.
  *  - The declareion extern uint32_t _sdata; makes C happy.  C will believe
- *    that the value _sdata is the address of a uint32_t variable _data (it is
- *    not!).
+ *    that the value _sdata is the address of a uint32_t variable _data (it
+ *    is not!).
  *  - We can recoved the linker value then by simply taking the address of
  *    of _data.  like:  uint32_t *pdata = &_sdata;
  */
@@ -254,9 +241,9 @@ EXTERN uint32_t _edata;           /* End+1 of .data */
 EXTERN uint32_t _sbss;            /* Start of .bss */
 EXTERN uint32_t _ebss;            /* End+1 of .bss */
 
-/* Sometimes, functions must be executed from RAM.  In this case, the following
- * macro may be used (with GCC!) to specify a function that will execute from
- * RAM.  For example,
+/* Sometimes, functions must be executed from RAM.  In this case, the
+ * following macro may be used (with GCC!) to specify a function that will
+ * execute from RAM.  For example,
  *
  *   int __ramfunc__ foo (void);
  *   int __ramfunc__ foo (void) { return bar; }
@@ -301,7 +288,7 @@ EXTERN uint32_t _eramfuncs;       /* Copy destination end address in RAM */
 
 #ifndef __ASSEMBLY__
 
-/* Low level initialization provided by board-level logic ******************/
+/* Low level initialization provided by board-level logic *******************/
 
 void arm_boot(void);
 
@@ -332,7 +319,8 @@ void up_pminitialize(void);
 
 /* Exception handling logic unique to the Cortex-M family */
 
-#if defined(CONFIG_ARCH_CORTEXM0) || defined(CONFIG_ARCH_ARMV7M) || defined(CONFIG_ARCH_ARMV8M)
+#if defined(CONFIG_ARCH_CORTEXM0) || defined(CONFIG_ARCH_ARMV7M) || \
+    defined(CONFIG_ARCH_ARMV8M)
 
 /* Interrupt acknowledge and dispatch */
 
@@ -474,10 +462,10 @@ void up_wdtinit(void);
 
 /* Networking ***************************************************************/
 
-/* Defined in board/xyz_network.c for board-specific Ethernet implementations,
- * or chip/xyx_ethernet.c for chip-specific Ethernet implementations, or
- * common/up_etherstub.c for a corner case where the network is enabled yet
- * there is no Ethernet driver to be initialized.
+/* Defined in board/xyz_network.c for board-specific Ethernet
+ * implementations, or chip/xyx_ethernet.c for chip-specific Ethernet
+ * implementations, or common/up_etherstub.c for a corner case where the
+ * network is enabled yet there is no Ethernet driver to be initialized.
  *
  * Use of common/up_etherstub.c is deprecated.  The preferred mechanism is to
  * use CONFIG_NETDEV_LATEINIT=y to suppress the call to up_netinitialize() in