iohighlevel.c

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/*++

Copyright (c) 2004 - 2006, 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.  


Module Name:

  IoHighLevel.c
  
Abstract: 

  High-level Io/Mmio functions.

  All assertions for bit field operations are handled bit field functions in the
  Base Library.

  The following IoLib instances share the same version of this file:

    BaseIoLibIntrinsic
    DxeIoLibCpuIo
    PeiIoLibCpuIo

--*/

#include "EdkIIGlueBase.h"

/**
  Reads an 8-bit I/O port, performs a bitwise inclusive OR, and writes the
  result back to the 8-bit I/O port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise inclusive OR
  between the read result and the value specified by OrData, and writes the
  result to the 8-bit I/O port specified by Port. The value written to the I/O
  port 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().

  @param  Port    The I/O port to write.
  @param  OrData  The value to OR with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoOr8 (
  IN      UINTN                     Port,
  IN      UINT8                     OrData
  )
{
  return IoWrite8 (Port, IoRead8 (Port) | OrData);
}

/**
  Reads an 8-bit I/O port, performs a bitwise AND, and writes the result back
  to the 8-bit I/O port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise AND between
  the read result and the value specified by AndData, and writes the result to
  the 8-bit I/O port specified by Port. The value written to the I/O port 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().

  @param  Port    The I/O port to write.
  @param  AndData The value to AND with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoAnd8 (
  IN      UINTN                     Port,
  IN      UINT8                     AndData
  )
{
  return IoWrite8 (Port, IoRead8 (Port) & AndData);
}

/**
  Reads an 8-bit I/O port, performs a bitwise AND followed by a bitwise
  inclusive OR, and writes the result back to the 8-bit I/O port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise AND between
  the read result and the value specified by AndData, performs a bitwise OR
  between the result of the AND operation and the value specified by OrData,
  and writes the result to the 8-bit I/O port specified by Port. The value
  written to the I/O port 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().

  @param  Port    The I/O port to write.
  @param  AndData The value to AND with the read value from the I/O port.
  @param  OrData  The value to OR with the result of the AND operation.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoAndThenOr8 (
  IN      UINTN                     Port,
  IN      UINT8                     AndData,
  IN      UINT8                     OrData
  )
{
  return IoWrite8 (Port, (IoRead8 (Port) & AndData) | OrData);
}

/**
  Reads a bit field of an I/O register.

  Reads the bit field in an 8-bit I/O register. The bit field is specified by
  the StartBit and the EndBit. The value of the bit field is returned.

  If 8-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 7, then ASSERT().
  If EndBit is greater than 7, then ASSERT().
  If EndBit is less than StartBit, then ASSERT().

  @param  Port      The I/O port to read.
  @param  StartBit  The ordinal of the least significant bit in the bit field.
                    Range 0..7.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..7.

  @return The value read.

**/
UINT8
EFIAPI
IoBitFieldRead8 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit
  )
{
  return BitFieldRead8 (IoRead8 (Port), StartBit, EndBit);
}

/**
  Writes a bit field to an I/O register.

  Writes Value to the bit field of the I/O register. The bit field is specified
  by the StartBit and the EndBit. All other bits in the destination I/O
  register are preserved. The value written to the I/O port is returned. Extra
  left bits in Value are stripped.

  If 8-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 7, then ASSERT().
  If EndBit is greater than 7, then ASSERT().
  If EndBit is less than StartBit, then ASSERT().

  @param  Port      The I/O port to write.
  @param  StartBit  The ordinal of the least significant bit in the bit field.
                    Range 0..7.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..7.
  @param  Value     New value of the bit field.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoBitFieldWrite8 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     Value
  )
{
  return IoWrite8 (
           Port,
           BitFieldWrite8 (IoRead8 (Port), StartBit, EndBit, Value)
           );
}

/**
  Reads a bit field in an 8-bit port, performs a bitwise OR, and writes the
  result back to the bit field in the 8-bit port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise inclusive OR
  between the read result and the value specified by OrData, and writes the
  result to the 8-bit I/O port specified by Port. The value written to the I/O
  port is returned. This function must guarantee that all I/O read and write
  operations are serialized. Extra left bits in OrData are stripped.

  If 8-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 7, then ASSERT().
  If EndBit is greater than 7, then ASSERT().
  If EndBit is less than StartBit, then ASSERT().

  @param  Port      The I/O port to write.
  @param  StartBit  The ordinal of the least significant bit in the bit field.
                    Range 0..7.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..7.
  @param  OrData    The value to OR with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoBitFieldOr8 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     OrData
  )
{
  return IoWrite8 (
           Port,
           BitFieldOr8 (IoRead8 (Port), StartBit, EndBit, OrData)
           );
}

/**
  Reads a bit field in an 8-bit port, performs a bitwise AND, and writes the
  result back to the bit field in the 8-bit port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise AND between
  the read result and the value specified by AndData, and writes the result to
  the 8-bit I/O port specified by Port. The value written to the I/O port is
  returned. This function must guarantee that all I/O read and write operations
  are serialized. Extra left bits in AndData are stripped.

  If 8-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 7, then ASSERT().
  If EndBit is greater than 7, then ASSERT().
  If EndBit is less than StartBit, then ASSERT().

  @param  Port      The I/O port to write.
  @param  StartBit  The ordinal of the least significant bit in the bit field.
                    Range 0..7.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..7.
  @param  AndData   The value to AND with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoBitFieldAnd8 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     AndData
  )
{
  return IoWrite8 (
           Port,
           BitFieldAnd8 (IoRead8 (Port), StartBit, EndBit, AndData)
           );
}

/**
  Reads a bit field in an 8-bit port, performs a bitwise AND followed by a
  bitwise inclusive OR, and writes the result back to the bit field in the
  8-bit port.

  Reads the 8-bit I/O port specified by Port, performs a bitwise AND followed
  by a bitwise inclusive OR between the read result and the value specified by
  AndData, and writes the result to the 8-bit I/O port specified by Port. The
  value written to the I/O port is returned. This function must guarantee that
  all I/O read and write operations are serialized. Extra left bits in both
  AndData and OrData are stripped.

  If 8-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 7, then ASSERT().
  If EndBit is greater than 7, then ASSERT().
  If EndBit is less than StartBit, then ASSERT().

  @param  Port      The I/O port to write.
  @param  StartBit  The ordinal of the least significant bit in the bit field.
                    Range 0..7.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..7.
  @param  AndData   The value to AND with the read value from the I/O port.
  @param  OrData    The value to OR with the result of the AND operation.

  @return The value written back to the I/O port.

**/
UINT8
EFIAPI
IoBitFieldAndThenOr8 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     AndData,
  IN      UINT8                     OrData
  )
{
  return IoWrite8 (
           Port,
           BitFieldAndThenOr8 (IoRead8 (Port), StartBit, EndBit, AndData, OrData)
           );
}

/**
  Reads a 16-bit I/O port, performs a bitwise inclusive OR, and writes the
  result back to the 16-bit I/O port.

  Reads the 16-bit I/O port specified by Port, performs a bitwise inclusive OR
  between the read result and the value specified by OrData, and writes the
  result to the 16-bit I/O port specified by Port. The value written to the I/O
  port 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().

  @param  Port    The I/O port to write.
  @param  OrData  The value to OR with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT16
EFIAPI
IoOr16 (
  IN      UINTN                     Port,
  IN      UINT16                    OrData
  )
{
  return IoWrite16 (Port, IoRead16 (Port) | OrData);
}

/**
  Reads a 16-bit I/O port, performs a bitwise AND, and writes the result back
  to the 16-bit I/O port.

  Reads the 16-bit I/O port specified by Port, performs a bitwise AND between
  the read result and the value specified by AndData, and writes the result to
  the 16-bit I/O port specified by Port. The value written to the I/O port 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().

  @param  Port    The I/O port to write.
  @param  AndData The value to AND with the read value from the I/O port.

  @return The value written back to the I/O port.

**/
UINT16
EFIAPI
IoAnd16 (
  IN      UINTN                     Port,
  IN      UINT16                    AndData
  )
{
  return IoWrite16 (Port, IoRead16 (Port) & AndData);
}