diff --git a/cpu/ixp/npe/include/IxOsalBackwardMemMap.h b/cpu/ixp/npe/include/IxOsalBackwardMemMap.h
new file mode 100644
index 0000000..18f8f24
--- /dev/null
+++ b/cpu/ixp/npe/include/IxOsalBackwardMemMap.h
@@ -0,0 +1,141 @@
+/** 
+ * This file is intended to provide backward 
+ * compatibility for main osService/OSSL 
+ * APIs. 
+ *
+ * It shall be phased out gradually and users
+ * are strongly recommended to use IX_OSAL API.
+ *
+ * @par
+ * IXP400 SW Release version 2.0
+ * 
+ * -- Copyright Notice --
+ * 
+ * @par
+ * Copyright 2001-2005, Intel Corporation.
+ * All rights reserved.
+ * 
+ * @par
+ * 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 of the Intel Corporation nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * @par
+ * 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.
+ * 
+ * @par
+ * -- End of Copyright Notice --
+ */
+
+
+#ifndef IX_OSAL_BACKWARD_MEM_MAP_H
+#define IX_OSAL_BACKWARD_MEM_MAP_H
+
+#include "IxOsal.h"
+
+#define IX_OSSERV_SWAP_LONG(wData) IX_OSAL_SWAP_LONG(wData)
+#define IX_OSSERV_SWAP_SHORT(sData) IX_OSAL_SWAP_SHORT(sData)
+
+#define IX_OSSERV_SWAP_SHORT_ADDRESS(sAddr) IX_OSAL_SWAP_SHORT_ADDRESS(sAddr)
+#define IX_OSSERV_SWAP_BYTE_ADDRESS(bAddr) IX_OSAL_SWAP_BYTE_ADDRESS(bAddr)
+
+#define IX_OSSERV_BE_XSTOBUSL(wData)  IX_OSAL_BE_XSTOBUSL(wData)
+#define IX_OSSERV_BE_XSTOBUSS(sData)  IX_OSAL_BE_XSTOBUSS(sData)
+#define IX_OSSERV_BE_XSTOBUSB(bData)  IX_OSAL_BE_XSTOBUSB(bData)
+#define IX_OSSERV_BE_BUSTOXSL(wData)  IX_OSAL_BE_BUSTOXSL(wData)
+#define IX_OSSERV_BE_BUSTOXSS(sData)  IX_OSAL_BE_BUSTOXSS(sData)
+#define IX_OSSERV_BE_BUSTOXSB(bData)  IX_OSAL_BE_BUSTOXSB(bData)
+
+#define IX_OSSERV_LE_AC_XSTOBUSL(wAddr) IX_OSAL_LE_AC_XSTOBUSL(wAddr)
+#define IX_OSSERV_LE_AC_XSTOBUSS(sAddr) IX_OSAL_LE_AC_XSTOBUSS(sAddr)
+#define IX_OSSERV_LE_AC_XSTOBUSB(bAddr) IX_OSAL_LE_AC_XSTOBUSB(bAddr)
+#define IX_OSSERV_LE_AC_BUSTOXSL(wAddr) IX_OSAL_LE_AC_BUSTOXSL(wAddr)
+#define IX_OSSERV_LE_AC_BUSTOXSS(sAddr) IX_OSAL_LE_AC_BUSTOXSS(sAddr)
+#define IX_OSSERV_LE_AC_BUSTOXSB(bAddr) IX_OSAL_LE_AC_BUSTOXSB(bAddr)
+
+#define IX_OSSERV_LE_DC_XSTOBUSL(wData) IX_OSAL_LE_DC_XSTOBUSL(wData)
+#define IX_OSSERV_LE_DC_XSTOBUSS(sData) IX_OSAL_LE_DC_XSTOBUSS(sData)
+#define IX_OSSERV_LE_DC_XSTOBUSB(bData) IX_OSAL_LE_DC_XSTOBUSB(bData)
+#define IX_OSSERV_LE_DC_BUSTOXSL(wData) IX_OSAL_LE_DC_BUSTOXSL(wData)
+#define IX_OSSERV_LE_DC_BUSTOXSS(sData) IX_OSAL_LE_DC_BUSTOXSS(sData)
+#define IX_OSSERV_LE_DC_BUSTOXSB(bData) IX_OSAL_LE_DC_BUSTOXSB(bData)
+
+#define IX_OSSERV_READ_LONG(wAddr)          IX_OSAL_READ_LONG(wAddr)
+#define IX_OSSERV_READ_SHORT(sAddr)         IX_OSAL_READ_SHORT(sAddr)
+#define IX_OSSERV_READ_BYTE(bAddr)          IX_OSAL_READ_BYTE(bAddr)
+#define IX_OSSERV_WRITE_LONG(wAddr, wData)  IX_OSAL_WRITE_LONG(wAddr, wData)
+#define IX_OSSERV_WRITE_SHORT(sAddr, sData) IX_OSAL_WRITE_SHORT(sAddr, sData)
+#define IX_OSSERV_WRITE_BYTE(bAddr, bData)  IX_OSAL_WRITE_BYTE(bAddr, bData)
+
+
+#define IX_OSSERV_READ_NPE_SHARED_LONG(wAddr)            IX_OSAL_READ_BE_SHARED_LONG(wAddr)
+#define IX_OSSERV_READ_NPE_SHARED_SHORT(sAddr)           IX_OSAL_READ_BE_SHARED_SHORT(sAddr)
+#define IX_OSSERV_WRITE_NPE_SHARED_LONG(wAddr, wData)    IX_OSAL_WRITE_BE_SHARED_LONG(wAddr, wData)
+#define IX_OSSERV_WRITE_NPE_SHARED_SHORT(sAddr, sData)   IX_OSAL_WRITE_BE_SHARED_SHORT(sAddr, sData)
+
+#define IX_OSSERV_SWAP_NPE_SHARED_LONG(wData)            IX_OSAL_SWAP_BE_SHARED_LONG(wData)
+#define IX_OSSERV_SWAP_NPE_SHARED_SHORT(sData)           IX_OSAL_SWAP_BE_SHARED_SHORT(sData)
+
+
+/* Map osServ address/size */
+#define IX_OSSERV_QMGR_MAP_SIZE			IX_OSAL_IXP400_QMGR_MAP_SIZE
+#define IX_OSSERV_EXP_REG_MAP_SIZE		IX_OSAL_IXP400_EXP_REG_MAP_SIZE
+#define IX_OSSERV_UART1_MAP_SIZE		IX_OSAL_IXP400_UART1_MAP_SIZE
+#define IX_OSSERV_UART2_MAP_SIZE		IX_OSAL_IXP400_UART2_MAP_SIZE
+#define IX_OSSERV_PMU_MAP_SIZE			IX_OSAL_IXP400_PMU_MAP_SIZE
+#define IX_OSSERV_OSTS_MAP_SIZE			IX_OSAL_IXP400_OSTS_MAP_SIZE
+#define IX_OSSERV_NPEA_MAP_SIZE			IX_OSAL_IXP400_NPEA_MAP_SIZE
+#define IX_OSSERV_NPEB_MAP_SIZE			IX_OSAL_IXP400_NPEB_MAP_SIZE
+#define IX_OSSERV_NPEC_MAP_SIZE			IX_OSAL_IXP400_NPEC_MAP_SIZE
+#define IX_OSSERV_ETHA_MAP_SIZE			IX_OSAL_IXP400_ETHA_MAP_SIZE
+#define IX_OSSERV_ETHB_MAP_SIZE			IX_OSAL_IXP400_ETHB_MAP_SIZE
+#define IX_OSSERV_USB_MAP_SIZE			IX_OSAL_IXP400_USB_MAP_SIZE
+#define IX_OSSERV_GPIO_MAP_SIZE			IX_OSAL_IXP400_GPIO_MAP_SIZE
+#define IX_OSSERV_EXP_BUS_MAP_SIZE		IX_OSAL_IXP400_EXP_BUS_MAP_SIZE
+#define IX_OSSERV_EXP_BUS_CS0_MAP_SIZE	IX_OSAL_IXP400_EXP_BUS_CS0_MAP_SIZE
+#define IX_OSSERV_EXP_BUS_CS1_MAP_SIZE	IX_OSAL_IXP400_EXP_BUS_CS1_MAP_SIZE
+#define IX_OSSERV_EXP_BUS_CS4_MAP_SIZE	IX_OSAL_IXP400_EXP_BUS_CS4_MAP_SIZE
+
+
+#define IX_OSSERV_GPIO_PHYS_BASE			IX_OSAL_IXP400_GPIO_PHYS_BASE
+#define IX_OSSERV_UART1_PHYS_BASE			IX_OSAL_IXP400_UART1_PHYS_BASE
+#define IX_OSSERV_UART2_PHYS_BASE			IX_OSAL_IXP400_UART2_PHYS_BASE
+#define IX_OSSERV_ETHA_PHYS_BASE			IX_OSAL_IXP400_ETHA_PHYS_BASE
+#define IX_OSSERV_ETHB_PHYS_BASE			IX_OSAL_IXP400_ETHB_PHYS_BASE
+#define IX_OSSERV_NPEA_PHYS_BASE			IX_OSAL_IXP400_NPEA_PHYS_BASE
+#define IX_OSSERV_NPEB_PHYS_BASE			IX_OSAL_IXP400_NPEB_PHYS_BASE
+#define IX_OSSERV_NPEC_PHYS_BASE			IX_OSAL_IXP400_NPEC_PHYS_BASE
+#define IX_OSSERV_PERIPHERAL_PHYS_BASE		IX_OSAL_IXP400_PERIPHERAL_PHYS_BASE
+#define IX_OSSERV_QMGR_PHYS_BASE			IX_OSAL_IXP400_QMGR_PHYS_BASE
+#define IX_OSSERV_OSTS_PHYS_BASE			IX_OSAL_IXP400_OSTS_PHYS_BASE
+#define IX_OSSERV_USB_PHYS_BASE				IX_OSAL_IXP400_USB_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_PHYS_BASE			IX_OSAL_IXP400_EXP_BUS_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_BOOT_PHYS_BASE	IX_OSAL_IXP400_EXP_BUS_BOOT_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_CS0_PHYS_BASE		IX_OSAL_IXP400_EXP_BUS_CS0_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_CS1_PHYS_BASE		IX_OSAL_IXP400_EXP_BUS_CS1_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_CS4_PHYS_BASE		IX_OSAL_IXP400_EXP_BUS_CS4_PHYS_BASE
+#define IX_OSSERV_EXP_BUS_REGS_PHYS_BASE	IX_OSAL_IXP400_EXP_BUS_REGS_PHYS_BASE
+
+#define IX_OSSERV_MEM_MAP(physAddr, size)		IX_OSAL_MEM_MAP(physAddr, size)
+
+#define IX_OSSERV_MEM_UNMAP(virtAddr) 			IX_OSAL_MEM_UNMAP(virtAddr)
+
+#endif /* IX_OSAL_BACKWARD_MEM_MAP_H */