iohighlevel.c

来自「EFI BIOS是Intel提出的下一代的BIOS标准。这里上传的Edk源代码是」· C语言 代码 · 共 1,842 行 · 第 1/5 页

/**
  Reads a 16-bit I/O port, performs a bitwise AND followed by 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 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 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.
  @param  OrData  The value to OR with the result of the AND operation.

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

**/
UINT16
EFIAPI
IoAndThenOr16 (
  IN      UINTN                     Port,
  IN      UINT16                    AndData,
  IN      UINT16                    OrData
  )
{
  return IoWrite16 (Port, (IoRead16 (Port) & AndData) | OrData);
}

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

  Reads the bit field in a 16-bit I/O register. The bit field is specified by
  the StartBit and the EndBit. The value of the bit field is returned.

  If 16-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 15, then ASSERT().
  If EndBit is greater than 15, 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..15.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..15.

  @return The value read.

**/
UINT16
EFIAPI
IoBitFieldRead16 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit
  )
{
  return BitFieldRead16 (IoRead16 (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 16-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 15, then ASSERT().
  If EndBit is greater than 15, 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..15.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..15.
  @param  Value     New value of the bit field.

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

**/
UINT16
EFIAPI
IoBitFieldWrite16 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT16                    Value
  )
{
  return IoWrite16 (
           Port,
           BitFieldWrite16 (IoRead16 (Port), StartBit, EndBit, Value)
           );
}

/**
  Reads a bit field in a 16-bit port, performs a bitwise OR, and writes the
  result back to the bit field in the 16-bit 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. Extra left bits in OrData are stripped.

  If 16-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 15, then ASSERT().
  If EndBit is greater than 15, 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..15.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..15.
  @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
IoBitFieldOr16 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT16                    OrData
  )
{
  return IoWrite16 (
           Port,
           BitFieldOr16 (IoRead16 (Port), StartBit, EndBit, OrData)
           );
}

/**
  Reads a bit field in a 16-bit port, performs a bitwise AND, and writes the
  result back to the bit field in the 16-bit 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. Extra left bits in AndData are stripped.

  If 16-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 15, then ASSERT().
  If EndBit is greater than 15, 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..15.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..15.
  @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
IoBitFieldAnd16 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT16                    AndData
  )
{
  return IoWrite16 (
           Port,
           BitFieldAnd16 (IoRead16 (Port), StartBit, EndBit, AndData)
           );
}

/**
  Reads a bit field in a 16-bit port, performs a bitwise AND followed by a
  bitwise inclusive OR, and writes the result back to the bit field in the
  16-bit port.

  Reads the 16-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 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. Extra left bits in both
  AndData and OrData are stripped.

  If 16-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 15, then ASSERT().
  If EndBit is greater than 15, 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..15.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..15.
  @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.

**/
UINT16
EFIAPI
IoBitFieldAndThenOr16 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT16                    AndData,
  IN      UINT16                    OrData
  )
{
  return IoWrite16 (
           Port,
           BitFieldAndThenOr16 (IoRead16 (Port), StartBit, EndBit, AndData, OrData)
           );
}

/**
  Reads a 32-bit I/O port, performs a bitwise inclusive OR, and writes the
  result back to the 32-bit I/O port.

  Reads the 32-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 32-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 32-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.

**/
UINT32
EFIAPI
IoOr32 (
  IN      UINTN                     Port,
  IN      UINT32                    OrData
  )
{
  return IoWrite32 (Port, IoRead32 (Port) | OrData);
}

/**
  Reads a 32-bit I/O port, performs a bitwise AND, and writes the result back
  to the 32-bit I/O port.

  Reads the 32-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 32-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 32-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.

**/
UINT32
EFIAPI
IoAnd32 (
  IN      UINTN                     Port,
  IN      UINT32                    AndData
  )
{
  return IoWrite32 (Port, IoRead32 (Port) & AndData);
}

/**
  Reads a 32-bit I/O port, performs a bitwise AND followed by a bitwise
  inclusive OR, and writes the result back to the 32-bit I/O port.

  Reads the 32-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 32-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 32-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.

**/
UINT32
EFIAPI
IoAndThenOr32 (
  IN      UINTN                     Port,
  IN      UINT32                    AndData,
  IN      UINT32                    OrData
  )
{
  return IoWrite32 (Port, (IoRead32 (Port) & AndData) | OrData);
}

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

  Reads the bit field in a 32-bit I/O register. The bit field is specified by
  the StartBit and the EndBit. The value of the bit field is returned.

  If 32-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 31, then ASSERT().
  If EndBit is greater than 31, 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..31.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..31.

  @return The value read.

**/
UINT32
EFIAPI
IoBitFieldRead32 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit
  )
{
  return BitFieldRead32 (IoRead32 (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 32-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 31, then ASSERT().
  If EndBit is greater than 31, 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..31.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..31.
  @param  Value     New value of the bit field.

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

**/
UINT32
EFIAPI
IoBitFieldWrite32 (
  IN      UINTN                     Port,