| /****************************************************************************** |
| * |
| * Copyright (C) 2009 - 2014 Xilinx, Inc. All rights reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * Use of the Software is limited solely to applications: |
| * (a) running on a Xilinx device, or |
| * (b) that interact with a Xilinx device through a bus or interconnect. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * XILINX BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF |
| * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Except as contained in this notice, the name of the Xilinx shall not be used |
| * in advertising or otherwise to promote the sale, use or other dealings in |
| * this Software without prior written authorization from Xilinx. |
| * |
| ******************************************************************************/ |
| /*****************************************************************************/ |
| /** |
| * |
| * @file xil_io.c |
| * |
| * Contains I/O functions for memory-mapped architectures. These functions |
| * encapsulate generic CPU I/O requirements. |
| * |
| * <pre> |
| * MODIFICATION HISTORY: |
| * |
| * Ver Who Date Changes |
| * ----- ---- -------- ------------------------------------------------------- |
| * 3.00a hbm 07/28/09 Initial release |
| * 3.00a hbm 07/21/10 Added Xil_EndianSwap32/16, Xil_Htonl/s, Xil_Ntohl/s |
| * 5.4 sk 01/14/16 Changed xil_io() and xil_out() functions to static inline |
| * functions. |
| * |
| * </pre> |
| * |
| * @note |
| * |
| * This file may contain architecture-dependent code. |
| * |
| ******************************************************************************/ |
| |
| /***************************** Include Files *********************************/ |
| |
| #include "xil_io.h" |
| #include "xil_types.h" |
| |
| /************************** Constant Definitions *****************************/ |
| |
| |
| /**************************** Type Definitions *******************************/ |
| |
| |
| /***************** Macros (Inline Functions) Definitions *********************/ |
| |
| |
| /************************** Function Prototypes ******************************/ |
| |
| |
| /***************** Macros (Inline Functions) and Functions Definitions *******/ |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a 16-bit endian converion. |
| * |
| * @param Data contains the value to be converted. |
| * |
| * @return converted value. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| u16 Xil_EndianSwap16(u16 Data) |
| { |
| return (u16) (((Data & 0xFF00U) >> 8U) | ((Data & 0x00FFU) << 8U)); |
| } |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a 32-bit endian converion. |
| * |
| * @param Data contains the value to be converted. |
| * |
| * @return converted value. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| u32 Xil_EndianSwap32(u32 Data) |
| { |
| u16 LoWord; |
| u16 HiWord; |
| |
| /* get each of the half words from the 32 bit word */ |
| |
| LoWord = (u16) (Data & 0x0000FFFFU); |
| HiWord = (u16) ((Data & 0xFFFF0000U) >> 16U); |
| |
| /* byte swap each of the 16 bit half words */ |
| |
| LoWord = (((LoWord & 0xFF00U) >> 8U) | ((LoWord & 0x00FFU) << 8U)); |
| HiWord = (((HiWord & 0xFF00U) >> 8U) | ((HiWord & 0x00FFU) << 8U)); |
| |
| /* swap the half words before returning the value */ |
| |
| return ((((u32)LoWord) << (u32)16U) | (u32)HiWord); |
| } |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a little-endian input operation for a 16-bit memory location |
| * by reading from the specified address and returning the byte-swapped value |
| * read from that address. |
| * |
| * @param Addr contains the address to perform the input operation at. |
| * |
| * @return The value read from the specified input address with the |
| * proper endianness. The return value has the same endianness |
| * as that of the processor, i.e. if the processor is big-engian, |
| * the return value is the byte-swapped value read from the |
| * address. |
| * |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| #ifndef __LITTLE_ENDIAN__ |
| u16 Xil_In16LE(UINTPTR Addr) |
| #else |
| u16 Xil_In16BE(UINTPTR Addr) |
| #endif |
| { |
| u16 Value; |
| |
| /* get the data then swap it */ |
| Value = Xil_In16(Addr); |
| |
| return Xil_EndianSwap16(Value); |
| } |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a little-endian input operation for a 32-bit memory location |
| * by reading from the specified address and returning the byte-swapped value |
| * read from that address. |
| * |
| * @param Addr contains the address to perform the input operation at. |
| * |
| * @return The value read from the specified input address with the |
| * proper endianness. The return value has the same endianness |
| * as that of the processor, i.e. if the processor is big-engian, |
| * the return value is the byte-swapped value read from the |
| * address. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| #ifndef __LITTLE_ENDIAN__ |
| u32 Xil_In32LE(UINTPTR Addr) |
| #else |
| u32 Xil_In32BE(UINTPTR Addr) |
| #endif |
| { |
| u32 InValue; |
| |
| /* get the data then swap it */ |
| InValue = Xil_In32(Addr); |
| return Xil_EndianSwap32(InValue); |
| } |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a little-endian output operation for a 16-bit memory location by |
| * writing the specified value to the the specified address. The value is |
| * byte-swapped before being written. |
| * |
| * @param Addr contains the address to perform the output operation at. |
| * @param Value contains the value to be output at the specified address. |
| * The value has the same endianness as that of the processor. |
| * If the processor is big-endian, the byte-swapped value is |
| * written to the address. |
| * |
| * @return None. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| #ifndef __LITTLE_ENDIAN__ |
| void Xil_Out16LE(UINTPTR Addr, u16 Value) |
| #else |
| void Xil_Out16BE(UINTPTR Addr, u16 Value) |
| #endif |
| { |
| u16 OutValue; |
| |
| /* swap the data then output it */ |
| OutValue = Xil_EndianSwap16(Value); |
| |
| Xil_Out16(Addr, OutValue); |
| } |
| |
| /*****************************************************************************/ |
| /** |
| * |
| * Perform a little-endian output operation for a 32-bit memory location |
| * by writing the specified value to the the specified address. The value is |
| * byte-swapped before being written. |
| * |
| * @param Addr contains the address at which the output operation at. |
| * @param Value contains the value to be output at the specified address. |
| * The value has the same endianness as that of the processor. |
| * If the processor is big-endian, the byte-swapped value is |
| * written to the address. |
| * |
| * @return None. |
| * |
| * @note None. |
| * |
| ******************************************************************************/ |
| #ifndef __LITTLE_ENDIAN__ |
| void Xil_Out32LE(UINTPTR Addr, u32 Value) |
| #else |
| void Xil_Out32BE(UINTPTR Addr, u32 Value) |
| #endif |
| { |
| u32 OutValue; |
| |
| /* swap the data then output it */ |
| OutValue = Xil_EndianSwap32(Value); |
| Xil_Out32(Addr, OutValue); |
| } |