MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c File Reference


Functions

int _inp (unsigned short port)
unsigned short _inpw (unsigned short port)
unsigned long _inpd (unsigned short port)
int _outp (unsigned short port, int databyte)
unsigned short _outpw (unsigned short port, unsigned short dataword)
unsigned long _outpd (unsigned short port, unsigned long dataword)
void _ReadWriteBarrier (void)
UINT8 EFIAPI IoRead8 (IN UINTN Port)
UINT8 EFIAPI IoWrite8 (IN UINTN Port, IN UINT8 Value)
UINT16 EFIAPI IoRead16 (IN UINTN Port)
UINT16 EFIAPI IoWrite16 (IN UINTN Port, IN UINT16 Value)
UINT32 EFIAPI IoRead32 (IN UINTN Port)
UINT32 EFIAPI IoWrite32 (IN UINTN Port, IN UINT32 Value)

Detailed Description

I/O Library. This file has compiler specifics for Microsft C as there is no ANSI C standard for doing IO.

MSC - uses intrinsic functions and the optimize will remove the function call overhead.

We don't advocate putting compiler specifics in libraries or drivers but there is no other way to make this work.

Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.
This program and the accompanying materials are licensed and made available under the terms and conditions of the BSD License which accompanies this distribution. The full text of the license may be found at http://opensource.org/licenses/bsd-license.php.

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.


Function Documentation

int _inp ( unsigned short  port  ) 

Referenced by IoRead8().

unsigned long _inpd ( unsigned short  port  ) 

Referenced by IoRead32().

unsigned short _inpw ( unsigned short  port  ) 

Referenced by IoRead16().

int _outp ( unsigned short  port,
int  databyte 
)

Referenced by IoWrite8().

unsigned long _outpd ( unsigned short  port,
unsigned long  dataword 
)

Referenced by IoWrite32().

unsigned short _outpw ( unsigned short  port,
unsigned short  dataword 
)

Referenced by IoWrite16().

void _ReadWriteBarrier ( void   ) 

UINT16 EFIAPI IoRead16 ( IN UINTN  Port  ) 

Reads a 16-bit I/O port.

Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned. This function must guarantee that all I/O read and write operations are serialized.

If 16-bit I/O port operations are not supported, then ASSERT(). If Port is not aligned on a 16-bit boundary, then ASSERT().

Parameters:
Port The I/O port to read.
Returns:
The value read.

References _inpw(), _ReadWriteBarrier, and ASSERT.

UINT32 EFIAPI IoRead32 ( IN UINTN  Port  ) 

Reads a 32-bit I/O port.

Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned. This function must guarantee that all I/O read and write operations are serialized.

If 32-bit I/O port operations are not supported, then ASSERT(). If Port is not aligned on a 32-bit boundary, then ASSERT().

Parameters:
Port The I/O port to read.
Returns:
The value read.

References _inpd(), _ReadWriteBarrier, and ASSERT.

UINT8 EFIAPI IoRead8 ( IN UINTN  Port  ) 

Reads an 8-bit I/O port.

Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned. This function must guarantee that all I/O read and write operations are serialized.

If 8-bit I/O port operations are not supported, then ASSERT().

Parameters:
Port The I/O port to read.
Returns:
The value read.

References _inp(), and _ReadWriteBarrier.

UINT16 EFIAPI IoWrite16 ( IN UINTN  Port,
IN UINT16  Value 
)

Writes a 16-bit I/O port.

Writes the 16-bit I/O port specified by Port with the value specified by Value and returns Value. This function must guarantee that all I/O read and write operations are serialized.

If 16-bit I/O port operations are not supported, then ASSERT(). If Port is not aligned on a 16-bit boundary, then ASSERT().

Parameters:
Port The I/O port to write.
Value The value to write to the I/O port.
Returns:
The value written to the I/O port.

References _outpw(), _ReadWriteBarrier, and ASSERT.

UINT32 EFIAPI IoWrite32 ( IN UINTN  Port,
IN UINT32  Value 
)

Writes a 32-bit I/O port.

Writes the 32-bit I/O port specified by Port with the value specified by Value and returns Value. This function must guarantee that all I/O read and write operations are serialized.

If 32-bit I/O port operations are not supported, then ASSERT(). If Port is not aligned on a 32-bit boundary, then ASSERT().

Parameters:
Port The I/O port to write.
Value The value to write to the I/O port.
Returns:
The value written to the I/O port.

References _outpd(), _ReadWriteBarrier, and ASSERT.

UINT8 EFIAPI IoWrite8 ( IN UINTN  Port,
IN UINT8  Value 
)

Writes an 8-bit I/O port.

Writes the 8-bit I/O port specified by Port with the value specified by Value and returns Value. This function must guarantee that all I/O read and write operations are serialized.

If 8-bit I/O port operations are not supported, then ASSERT().

Parameters:
Port The I/O port to write.
Value The value to write to the I/O port.
Returns:
The value written to the I/O port.

References _outp(), and _ReadWriteBarrier.


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