diff --git a/boards/arm/cxd56xx/common/Kconfig b/boards/arm/cxd56xx/common/Kconfig
new file mode 100644
index 0000000000..f72f3c094c
--- /dev/null
+++ b/boards/arm/cxd56xx/common/Kconfig
@@ -0,0 +1,4 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
diff --git a/boards/arm/cxd56xx/common/Makefile b/boards/arm/cxd56xx/common/Makefile
new file mode 100644
index 0000000000..0326d1849d
--- /dev/null
+++ b/boards/arm/cxd56xx/common/Makefile
@@ -0,0 +1,40 @@
+############################################################################
+# boards/arm/cxd56x/spresense/src/Makefile
+#
+#   Copyright 2018 Sony Semiconductor Solutions Corporation
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 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.
+#
+############################################################################
+
+-include $(TOPDIR)/Make.defs
+
+include board$(DELIM)Make.defs
+include src$(DELIM)Make.defs
+
+include $(TOPDIR)/boards/Board.mk
diff --git a/boards/arm/cxd56xx/common/src/Make.defs b/boards/arm/cxd56xx/common/src/Make.defs
new file mode 100644
index 0000000000..a8da168209
--- /dev/null
+++ b/boards/arm/cxd56xx/common/src/Make.defs
@@ -0,0 +1,37 @@
+############################################################################
+# boards/arm/cxd56x/spresense/common/Make.defs
+#
+#   Copyright 2018 Sony Semiconductor Solutions Corporation
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# 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.
+#
+############################################################################
+
+DEPPATH += --dep-path src
+VPATH += :src
+CFLAGS += $(shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)src)
diff --git a/boards/arm/cxd56xx/spresense/src/Makefile b/boards/arm/cxd56xx/spresense/src/Make.defs
similarity index 93%
rename from boards/arm/cxd56xx/spresense/src/Makefile
rename to boards/arm/cxd56xx/spresense/src/Make.defs
index efc768f743..2837927e3b 100644
--- a/boards/arm/cxd56xx/spresense/src/Makefile
+++ b/boards/arm/cxd56xx/spresense/src/Make.defs
@@ -1,5 +1,5 @@
 ############################################################################
-# boards/arm/cxd56x/spresense/src/Makefile
+# boards/arm/cxd56x/spresense/src/Make.defs
 #
 #   Copyright 2018 Sony Semiconductor Solutions Corporation
 #
@@ -32,13 +32,6 @@
 #
 ############################################################################
 
--include $(TOPDIR)/Make.defs
-
-DEPPATH = --dep-path .
-
-ASRCS =
-CSRCS =
-
 CSRCS += cxd56_main.c
 CSRCS += cxd56_boot.c
 CSRCS += cxd56_clock.c
@@ -133,4 +126,6 @@ ifeq ($(CONFIG_LCD_ILI9340),y)
 CSRCS += cxd56_ili9340.c
 endif
 
-include $(TOPDIR)/boards/Board.mk
+DEPPATH += --dep-path board
+VPATH += :board
+CFLAGS += $(shell $(INCDIR) $(INCDIROPT) "$(CC)" $(TOPDIR)$(DELIM)arch$(DELIM)$(CONFIG_ARCH)$(DELIM)src$(DELIM)board$(DELIM)board)
diff --git a/tools/Makefile.unix b/tools/Makefile.unix
index 43c8259de4..f5baa5ad8e 100644
--- a/tools/Makefile.unix
+++ b/tools/Makefile.unix
@@ -80,6 +80,7 @@ endif
 else
 BOARD_DIR = $(TOPDIR)$(DELIM)boards$(DELIM)$(CONFIG_ARCH)$(DELIM)$(CONFIG_ARCH_CHIP)
 endif
+COMMON_DIR = $(if $(wildcard $(TOPDIR)$(DELIM)boards$(DELIM)$(CONFIG_ARCH)$(DELIM)$(CONFIG_ARCH_CHIP)/common/Makefile),y,)
 
 # CONFIG_APPS_DIR can be over-ridden from the command line or in the .config file.
 # The default value of CONFIG_APPS_DIR is ../apps.  Ultimately, the application
@@ -320,11 +321,22 @@ include/arch/board: include/arch
 	@echo "LN: include/arch/board to $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/include"
 	$(Q) $(DIRLINK) $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/include include/arch/board
 
+ifeq ($(COMMON_DIR),y)
+# Link the boards/<arch>/<chip>/common dir to arch/<arch-name>/src/board
 # Link the boards/<arch>/<chip>/<board>/src dir to arch/<arch-name>/src/board
 
+$(ARCH_SRC)/board: .config
+	@echo "LN: $(ARCH_SRC)/board to $(BOARD_DIR)/common"
+	$(Q) $(DIRLINK) $(BOARD_DIR)/common $(ARCH_SRC)/board
+	@echo "LN: $(ARCH_SRC)/board/board to $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/src"
+	$(Q) $(DIRLINK) $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/src $(ARCH_SRC)/board/board
+else
+# Link the boards/<arch>/<chip>/<board>/src dir to arch/<arch-name>/src/boar
+
 $(ARCH_SRC)/board: .config
 	@echo "LN: $(ARCH_SRC)/board to $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/src"
 	$(Q) $(DIRLINK) $(BOARD_DIR)/$(CONFIG_ARCH_BOARD)/src $(ARCH_SRC)/board
+endif
 
 # Link the boards/<arch>/<chip>/drivers dir to drivers/platform
 
@@ -380,6 +392,7 @@ clean_context:
 	$(Q) $(DIRUNLINK) include/arch/board
 	$(Q) $(DIRUNLINK) include/arch/chip
 	$(Q) $(DIRUNLINK) include/arch
+	$(Q) $(DIRUNLINK) $(ARCH_SRC)/board/board
 	$(Q) $(DIRUNLINK) $(ARCH_SRC)/board
 	$(Q) $(DIRUNLINK) $(ARCH_SRC)/chip
 	$(Q) $(DIRUNLINK) $(TOPDIR)/drivers/platform