diff --git a/Makefile b/Makefile
index befb608..2ac8141 100644
--- a/Makefile
+++ b/Makefile
@@ -2582,17 +2582,63 @@
 at91cap9adk_config	:	unconfig
 	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91cap9adk atmel at91
 
+at91sam9260ek_nandflash_config \
+at91sam9260ek_dataflash_cs0_config \
+at91sam9260ek_dataflash_cs1_config \
 at91sam9260ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9260ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	elif [ "$(findstring dataflash_cs0,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS0 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS1 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS1" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9260ek arm arm926ejs at91sam9260ek atmel at91
 
+at91sam9261ek_nandflash_config \
+at91sam9261ek_dataflash_cs0_config \
+at91sam9261ek_dataflash_cs3_config \
 at91sam9261ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9261ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	elif [ "$(findstring dataflash_cs3,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS3 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS3" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH_CS0 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9261ek arm arm926ejs at91sam9261ek atmel at91
 
+at91sam9263ek_nandflash_config \
+at91sam9263ek_dataflash_config \
+at91sam9263ek_dataflash_cs0_config \
 at91sam9263ek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9263ek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9263ek arm arm926ejs at91sam9263ek atmel at91
 
+at91sam9rlek_nandflash_config \
+at91sam9rlek_dataflash_config \
+at91sam9rlek_dataflash_cs0_config \
 at91sam9rlek_config	:	unconfig
-	@$(MKCONFIG) $(@:_config=) arm arm926ejs at91sam9rlek atmel at91
+	@if [ "$(findstring _nandflash,$@)" ] ; then \
+		echo "#define CONFIG_SYS_USE_NANDFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in NAND FLASH" ; \
+	else \
+		echo "#define CONFIG_SYS_USE_DATAFLASH 1"	>>$(obj)include/config.h ; \
+		$(XECHO) "... with environment variable in SPI DATAFLASH CS0" ; \
+	fi;
+	@$(MKCONFIG) -a at91sam9rlek arm arm926ejs at91sam9rlek atmel at91
 
 ########################################################################
 ## ARM Integrator boards - see doc/README-integrator for more info.
diff --git a/doc/README.at91 b/doc/README.at91
new file mode 100644
index 0000000..838769a
--- /dev/null
+++ b/doc/README.at91
@@ -0,0 +1,88 @@
+Atmel AT91 Evaluation kits
+
+http://atmel.com/dyn/products/tools.asp?family_id=605#1443
+
+------------------------------------------------------------------------------
+AT91SAM9260EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J13)
+	0xD0000000 - Dxxxxxxx	Soldered Atmel Dataflash
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 1 (default)
+		- Dataflash on SPI chip select 0 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9260ek_config		- use data flash (spi cs1) (default)
+		make at91sam9260ek_nandflash_config	- use nand flash
+		make at91sam9260ek_dataflash_cs0_config	- use data flash (spi cs0)
+		make at91sam9260ek_dataflash_cs1_config	- use data flash (spi cs1)
+
+
+------------------------------------------------------------------------------
+AT91SAM9261EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Soldered Atmel Dataflash
+	0xD0000000 - Dxxxxxxx	Atmel Dataflash card (J22)
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0 (default)
+		- Dataflash on SPI chip select 3 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9261ek_config		- use data flash (spi cs0) (default)
+		make at91sam9261ek_nandflash_config	- use nand flash
+		make at91sam9261ek_dataflash_cs0_config	- use data flash (spi cs0)
+		make at91sam9261ek_dataflash_cs3_config	- use data flash (spi cs3)
+
+
+------------------------------------------------------------------------------
+AT91SAM9263EK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Atmel Dataflash card (J9)
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0 (dataflash card)
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9263ek_config		- use data flash (spi cs0) (default)
+		make at91sam9263ek_nandflash_config	- use nand flash
+		make at91sam9263ek_dataflash_cs0_config	- use data flash (spi cs0)
+
+
+------------------------------------------------------------------------------
+AT91SAM9RLEK
+------------------------------------------------------------------------------
+
+Memory map
+	0x20000000 - 23FFFFFF	SDRAM (64 MB)
+	0xC0000000 - Cxxxxxxx	Soldered Atmel Dataflash
+
+Environment variables
+
+	U-Boot environment variables can be stored at different places:
+		- Dataflash on SPI chip select 0
+		- Nand flash.
+
+	You can choose your storage location at config step (here for at91sam9260ek) :
+		make at91sam9263ek_config		- use data flash (spi cs0) (default)
+		make at91sam9263ek_nandflash_config	- use nand flash
+		make at91sam9263ek_dataflash_cs0_config	- use data flash (spi cs0)
diff --git a/include/configs/at91sam9260ek.h b/include/configs/at91sam9260ek.h
index fbc470f..2df8d54 100644
--- a/include/configs/at91sam9260ek.h
+++ b/include/configs/at91sam9260ek.h
@@ -131,10 +131,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#undef CONFIG_SYS_USE_DATAFLASH_CS0
-#define CONFIG_SYS_USE_DATAFLASH_CS1		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH_CS0
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */
diff --git a/include/configs/at91sam9261ek.h b/include/configs/at91sam9261ek.h
index bd66823..0016b4f 100644
--- a/include/configs/at91sam9261ek.h
+++ b/include/configs/at91sam9261ek.h
@@ -144,15 +144,12 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH_CS0		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH_CS0
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */
 #define CONFIG_ENV_IS_IN_DATAFLASH	1
 #define CONFIG_SYS_MONITOR_BASE	(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0 + 0x8400)
-#define CONFIG_ENV_OFFSET		0x4200
+#define CONFIG_ENV_OFFSET	0x4200
 #define CONFIG_ENV_ADDR		(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS0 + CONFIG_ENV_OFFSET)
 #define CONFIG_ENV_SIZE		0x4200
 #define CONFIG_BOOTCOMMAND	"cp.b 0xC0042000 0x22000000 0x210000; bootm"
@@ -161,6 +158,20 @@
 				"mtdparts=at91_nand:-(root) "		\
 				"rw rootfstype=jffs2"
 
+#elif CONFIG_SYS_USE_DATAFLASH_CS3
+
+/* bootstrap + u-boot + env + linux in dataflash on CS3 */
+#define CONFIG_ENV_IS_IN_DATAFLASH	1
+#define CONFIG_SYS_MONITOR_BASE	(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3 + 0x8400)
+#define CONFIG_ENV_OFFSET	0x4200
+#define CONFIG_ENV_ADDR		(CONFIG_SYS_DATAFLASH_LOGIC_ADDR_CS3 + CONFIG_ENV_OFFSET)
+#define CONFIG_ENV_SIZE		0x4200
+#define CONFIG_BOOTCOMMAND	"cp.b 0xD0042000 0x22000000 0x210000; bootm"
+#define CONFIG_BOOTARGS		"console=ttyS0,115200 "			\
+				"root=/dev/mtdblock0 "			\
+				"mtdparts=at91_nand:-(root) "		\
+				"rw rootfstype=jffs2"
+
 #else /* CONFIG_SYS_USE_NANDFLASH */
 
 /* bootstrap + u-boot + env + linux in nandflash */
diff --git a/include/configs/at91sam9263ek.h b/include/configs/at91sam9263ek.h
index a2b09ca..fc7c941 100644
--- a/include/configs/at91sam9263ek.h
+++ b/include/configs/at91sam9263ek.h
@@ -151,9 +151,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */
diff --git a/include/configs/at91sam9rlek.h b/include/configs/at91sam9rlek.h
index 35dac47..35fefc4 100644
--- a/include/configs/at91sam9rlek.h
+++ b/include/configs/at91sam9rlek.h
@@ -118,9 +118,6 @@
 #define CONFIG_SYS_MEMTEST_START		PHYS_SDRAM
 #define CONFIG_SYS_MEMTEST_END			0x23e00000
 
-#define CONFIG_SYS_USE_DATAFLASH		1
-#undef CONFIG_SYS_USE_NANDFLASH
-
 #ifdef CONFIG_SYS_USE_DATAFLASH
 
 /* bootstrap + u-boot + env + linux in dataflash on CS0 */