Xilinx Processor IP Library

Software Drivers

xio.c File Reference

Detailed Description

Contains I/O functions for memory-mapped or non-memory-mapped I/O architectures. These functions encapsulate generic CPU I/O requirements.

 MODIFICATION HISTORY:

 Ver   Who  Date	 Changes
 ----- ---- -------- -------------------------------------------------------
 1.00a rpm  11/07/03 Added InSwap/OutSwap routines for endian conversion
 1.01a ecm  02/24/06 CR225908 corrected the extra curly braces in macros
                     and bumped version to 1.01.a.
 2.11a mta  03/21/07 Updated to new coding style.

Note:
This file may contain architecture-dependent code.

#include "xio.h"
#include "xil_types.h"
#include "xil_assert.h"

Functions

void XIo_EndianSwap16 (u16 Source, u16 *DestPtr)
void XIo_EndianSwap32 (u32 Source, u32 *DestPtr)
u16 XIo_InSwap16 (XIo_Address InAddress)
u32 XIo_InSwap32 (XIo_Address InAddress)
void XIo_OutSwap16 (XIo_Address OutAddress, u16 Value)
void XIo_OutSwap32 (XIo_Address OutAddress, u32 Value)

Function Documentation

void XIo_EndianSwap16 (  u16  Source,
u16 *  DestPtr
) 
 

Performs a 16-bit endian converion.

Parameters:
Source contains the value to be converted.
DestPtr contains a pointer to the location to put the converted value.
Returns:
None.
Note:
None.

void XIo_EndianSwap32 (  u32  Source,
u32 *  DestPtr
) 
 

Performs a 32-bit endian converion.

Parameters:
Source contains the value to be converted.
DestPtr contains a pointer to the location to put the converted value.
Returns:
None.
Note:
None.

u16 XIo_InSwap16 (  XIo_Address  InAddress  ) 
 

Performs an input operation for a 16-bit memory location by reading from the specified address and returning the byte-swapped value read from that address.

Parameters:
InAddress contains the address to perform the input operation at.
Returns:
The byte-swapped value read from the specified input address.
Note:
None.

u32 XIo_InSwap32 (  XIo_Address  InAddress  ) 
 

Performs an input operation for a 32-bit memory location by reading from the specified address and returning the byte-swapped value read from that address.

Parameters:
InAddress contains the address to perform the input operation at.
Returns:
The byte-swapped value read from the specified input address.
Note:
None.

void XIo_OutSwap16 (  XIo_Address  OutAddress,
u16  Value
) 
 

Performs an 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.

Parameters:
OutAddress contains the address to perform the output operation at.
Value contains the value to be output at the specified address.
Returns:
None.
Note:
None.

void XIo_OutSwap32 (  XIo_Address  OutAddress,
u32  Value
) 
 

Performs an 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.

Parameters:
OutAddress contains the address at which the output operation has to be done.
Value contains the value to be output at the specified address.
Returns:
None.
Note:
None.
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