2c8f92039d
Added initial support Xilinx Embedded Software. Signed-off-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
227 lines
7 KiB
C
Executable file
227 lines
7 KiB
C
Executable file
/******************************************************************************
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*
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* Copyright (C) 2007 - 2014 Xilinx, Inc. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* Use of the Software is limited solely to applications:
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* (a) running on a Xilinx device, or
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* (b) that interact with a Xilinx device through a bus or interconnect.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* XILINX CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Except as contained in this notice, the name of the Xilinx shall not be used
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* in advertising or otherwise to promote the sale, use or other dealings in
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* this Software without prior written authorization from Xilinx.
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*
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******************************************************************************/
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/*****************************************************************************/
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/**
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*
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* @file xio.c
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*
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* Contains I/O functions for memory-mapped or non-memory-mapped I/O
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* architectures. These functions encapsulate generic CPU I/O requirements.
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*
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* <pre>
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* MODIFICATION HISTORY:
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*
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* Ver Who Date Changes
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* ----- ---- -------- -------------------------------------------------------
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* 1.00a rpm 11/07/03 Added InSwap/OutSwap routines for endian conversion
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* 1.01a ecm 02/24/06 CR225908 corrected the extra curly braces in macros
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* and bumped version to 1.01.a.
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* 2.11a mta 03/21/07 Updated to new coding style.
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*
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* </pre>
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*
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* @note
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*
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* This file may contain architecture-dependent code.
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*
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******************************************************************************/
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/***************************** Include Files *********************************/
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#include "xio.h"
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#include "xil_types.h"
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#include "xil_assert.h"
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/************************** Constant Definitions *****************************/
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/**************************** Type Definitions *******************************/
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/***************** Macros (Inline Functions) Definitions *********************/
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/************************** Function Prototypes ******************************/
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/*****************************************************************************/
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/**
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*
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* Performs a 16-bit endian converion.
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*
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* @param Source contains the value to be converted.
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* @param DestPtr contains a pointer to the location to put the
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* converted value.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void XIo_EndianSwap16(u16 Source, u16 *DestPtr)
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{
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*DestPtr = (u16) (((Source & 0xFF00) >> 8) | ((Source & 0x00FF) << 8));
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}
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/*****************************************************************************/
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/**
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*
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* Performs a 32-bit endian converion.
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*
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* @param Source contains the value to be converted.
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* @param DestPtr contains a pointer to the location to put the
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* converted value.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void XIo_EndianSwap32(u32 Source, u32 *DestPtr)
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{
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/* get each of the half words from the 32 bit word */
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u16 LoWord = (u16) (Source & 0x0000FFFF);
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u16 HiWord = (u16) ((Source & 0xFFFF0000) >> 16);
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/* byte swap each of the 16 bit half words */
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LoWord = (((LoWord & 0xFF00) >> 8) | ((LoWord & 0x00FF) << 8));
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HiWord = (((HiWord & 0xFF00) >> 8) | ((HiWord & 0x00FF) << 8));
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/* swap the half words before returning the value */
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*DestPtr = (u32) ((LoWord << 16) | HiWord);
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}
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/*****************************************************************************/
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/**
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*
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* Performs an input operation for a 16-bit memory location by reading from the
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* specified address and returning the byte-swapped value read from that
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* address.
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*
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* @param InAddress contains the address to perform the input
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* operation at.
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*
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* @return The byte-swapped value read from the specified input address.
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*
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* @note None.
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*
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******************************************************************************/
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u16 XIo_InSwap16(XIo_Address InAddress)
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{
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u16 InData;
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/* get the data then swap it */
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InData = XIo_In16(InAddress);
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return (u16) (((InData & 0xFF00) >> 8) | ((InData & 0x00FF) << 8));
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}
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/*****************************************************************************/
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/**
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*
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* Performs an input operation for a 32-bit memory location by reading from the
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* specified address and returning the byte-swapped value read from that
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* address.
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*
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* @param InAddress contains the address to perform the input
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* operation at.
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*
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* @return The byte-swapped value read from the specified input address.
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*
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* @note None.
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*
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******************************************************************************/
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u32 XIo_InSwap32(XIo_Address InAddress)
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{
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u32 InData;
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u32 SwapData;
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/* get the data then swap it */
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InData = XIo_In32(InAddress);
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XIo_EndianSwap32(InData, &SwapData);
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return SwapData;
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}
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/*****************************************************************************/
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/**
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*
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* Performs an output operation for a 16-bit memory location by writing the
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* specified value to the the specified address. The value is byte-swapped
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* before being written.
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*
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* @param OutAddress contains the address to perform the output
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* operation at.
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* @param Value contains the value to be output at the specified address.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void XIo_OutSwap16(XIo_Address OutAddress, u16 Value)
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{
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u16 OutData;
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/* swap the data then output it */
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OutData = (u16) (((Value & 0xFF00) >> 8) | ((Value & 0x00FF) << 8));
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XIo_Out16(OutAddress, OutData);
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}
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/*****************************************************************************/
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/**
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*
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* Performs an output operation for a 32-bit memory location by writing the
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* specified value to the the specified address. The value is byte-swapped
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* before being written.
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*
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* @param OutAddress contains the address at which the
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* output operation has to be done.
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* @param Value contains the value to be output at the specified address.
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*
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* @return None.
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*
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* @note None.
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*
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******************************************************************************/
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void XIo_OutSwap32(XIo_Address OutAddress, u32 Value)
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{
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u32 OutData;
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/* swap the data then output it */
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XIo_EndianSwap32(Value, &OutData);
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XIo_Out32(OutAddress, OutData);
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}
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