diff --git a/cpu/cc2538/cc2538.lds b/cpu/cc2538/cc2538.lds
index 189968717..ef465409e 100644
--- a/cpu/cc2538/cc2538.lds
+++ b/cpu/cc2538/cc2538.lds
@@ -35,8 +35,7 @@
  */
 MEMORY
 {
-    FLASH_FW (rx) : ORIGIN = COFFEE_START + COFFEE_SIZE,
-                    LENGTH = FLASH_CCA_ADDR - (COFFEE_START + COFFEE_SIZE)
+    FLASH_FW (rx) : ORIGIN = FLASH_FW_ADDR, LENGTH = FLASH_FW_SIZE
     FLASH_CCA (RX) : ORIGIN = FLASH_CCA_ADDR, LENGTH = FLASH_CCA_SIZE
 
     /*
diff --git a/cpu/cc2538/dev/flash.h b/cpu/cc2538/dev/flash.h
index 6af19723e..49db85b20 100644
--- a/cpu/cc2538/dev/flash.h
+++ b/cpu/cc2538/dev/flash.h
@@ -48,6 +48,7 @@
 #define FLASH_H_
 
 #include "dev/cc2538-dev.h"
+#include "cfs-coffee-arch.h"
 
 #include <stdint.h>
 /*---------------------------------------------------------------------------*/
@@ -90,6 +91,23 @@
 #define FLASH_CCA_LOCK_DEBUG_BIT                7  /**< Debug lock bit position in the corresponding lock byte */
 /** @} */
 /*---------------------------------------------------------------------------*/
+/** \name Firmware location in flash memory
+ * @{
+ */
+#ifdef FLASH_CONF_FW_ADDR
+#define FLASH_FW_ADDR   FLASH_CONF_FW_ADDR
+#elif !defined(COFFEE_CONF_CUSTOM_PORT)
+#define FLASH_FW_ADDR   (COFFEE_START + COFFEE_SIZE)
+#else
+#define FLASH_FW_ADDR   CC2538_DEV_FLASH_ADDR
+#endif
+#ifdef FLASH_CONF_FW_SIZE
+#define FLASH_FW_SIZE   FLASH_CONF_FW_SIZE
+#else
+#define FLASH_FW_SIZE   (FLASH_CCA_ADDR - FLASH_FW_ADDR)
+#endif
+/** @} */
+/*---------------------------------------------------------------------------*/
 /** \name Flash lock bit page and CCA layout
  * @{
  */