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 bit field in a 64-bit port, performs a bitwise AND followed by a
  bitwise inclusive OR, and writes the result back to the bit field in the
  64-bit port.

  Reads the 64-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 64-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 64-bit I/O port operations are not supported, then ASSERT().
  If StartBit is greater than 63, then ASSERT().
  If EndBit is greater than 63, 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..63.
  @param  EndBit    The ordinal of the most significant bit in the bit field.
                    Range 0..63.
  @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.

**/
UINT64
EFIAPI
IoBitFieldAndThenOr64 (
  IN      UINTN                     Port,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT64                    AndData,
  IN      UINT64                    OrData
  )
{
  return IoWrite64 (
           Port,
           BitFieldAndThenOr64 (IoRead64 (Port), StartBit, EndBit, AndData, OrData)
           );
}

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

  Reads the 8-bit MMIO register specified by Address, performs a bitwise
  inclusive OR between the read result and the value specified by OrData, and
  writes the result to the 8-bit MMIO register specified by Address. The value
  written to the MMIO register is returned. This function must guarantee that
  all MMIO read and write operations are serialized.

  If 8-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  OrData  The value to OR with the read value from the MMIO register.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioOr8 (
  IN      UINTN                     Address,
  IN      UINT8                     OrData
  )
{
  return MmioWrite8 (Address, MmioRead8 (Address) | OrData);
}

/**
  Reads an 8-bit MMIO register, performs a bitwise AND, and writes the result
  back to the 8-bit MMIO register.

  Reads the 8-bit MMIO register specified by Address, performs a bitwise AND
  between the read result and the value specified by AndData, and writes the
  result to the 8-bit MMIO register specified by Address. The value written to
  the MMIO register is returned. This function must guarantee that all MMIO
  read and write operations are serialized.

  If 8-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  AndData The value to AND with the read value from the MMIO register.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioAnd8 (
  IN      UINTN                     Address,
  IN      UINT8                     AndData
  )
{
  return MmioWrite8 (Address, MmioRead8 (Address) & AndData);
}

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

  Reads the 8-bit MMIO register specified by Address, 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 MMIO register specified by
  Address. The value written to the MMIO register is returned. This function
  must guarantee that all MMIO read and write operations are serialized.

  If 8-bit MMIO register operations are not supported, then ASSERT().


  @param  Address The MMIO register to write.
  @param  AndData The value to AND with the read value from the MMIO register.
  @param  OrData  The value to OR with the result of the AND operation.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioAndThenOr8 (
  IN      UINTN                     Address,
  IN      UINT8                     AndData,
  IN      UINT8                     OrData
  )
{
  return MmioWrite8 (Address, (MmioRead8 (Address) & AndData) | OrData);
}

/**
  Reads a bit field of a MMIO register.

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

  If 8-bit MMIO register 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  Address   MMIO register 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
MmioBitFieldRead8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit
  )
{
  return BitFieldRead8 (MmioRead8 (Address), StartBit, EndBit);
}

/**
  Writes a bit field to a MMIO register.

  Writes Value to the bit field of the MMIO register. The bit field is
  specified by the StartBit and the EndBit. All other bits in the destination
  MMIO register are preserved. The new value of the 8-bit register is returned.

  If 8-bit MMIO register 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  Address   MMIO register 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 MMIO register.

**/
UINT8
EFIAPI
MmioBitFieldWrite8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     Value
  )
{
  return MmioWrite8 (
           Address,
           BitFieldWrite8 (MmioRead8 (Address), StartBit, EndBit, Value)
           );
}

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

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

  If 8-bit MMIO register 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  Address   MMIO register 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 read value from the MMIO register.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioBitFieldOr8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     OrData
  )
{
  return MmioWrite8 (
           Address,
           BitFieldOr8 (MmioRead8 (Address), StartBit, EndBit, OrData)
           );
}

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

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

  If 8-bit MMIO register 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  Address   MMIO register 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 read value from the MMIO register.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioBitFieldAnd8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     AndData
  )
{
  return MmioWrite8 (
           Address,
           BitFieldAnd8 (MmioRead8 (Address), StartBit, EndBit, AndData)
           );
}

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

  Reads the 8-bit MMIO register specified by Address, 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 MMIO register
  specified by Address. The value written to the MMIO register is returned.
  This function must guarantee that all MMIO read and write operations are
  serialized. Extra left bits in both AndData and OrData are stripped.

  If 8-bit MMIO register 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  Address   MMIO register 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 read value from the MMIO register.
  @param  OrData    The value to OR with the result of the AND operation.

  @return The value written back to the MMIO register.

**/
UINT8
EFIAPI
MmioBitFieldAndThenOr8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     AndData,
  IN      UINT8                     OrData
  )
{
  return MmioWrite8 (
           Address,
           BitFieldAndThenOr8 (MmioRead8 (Address), StartBit, EndBit, AndData, OrData)
           );
}

/**
  Reads a 16-bit MMIO register, performs a bitwise inclusive OR, and writes the
  result back to the 16-bit MMIO register.

  Reads the 16-bit MMIO register specified by Address, performs a bitwise
  inclusive OR between the read result and the value specified by OrData, and
  writes the result to the 16-bit MMIO register specified by Address. The value
  written to the MMIO register is returned. This function must guarantee that
  all MMIO read and write operations are serialized.

  If 16-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.
  @param  OrData  The value to OR with the read value from the MMIO register.

  @return The value written back to the MMIO register.

**/
UINT16
EFIAPI
MmioOr16 (
  IN      UINTN                     Address,
  IN      UINT16                    OrData
  )
{
  return MmioWrite16 (Address, MmioRead16 (Address) | OrData);
}

/**
  Reads a 16-bit MMIO register, performs a bitwise AND, and writes the result
  back to the 16-bit MMIO register.

  Reads the 16-bit MMIO register specified by Address, performs a bitwise AND
  between the read result and the value specified by AndData, and writes the
  result to the 16-bit MMIO register specified by Address. The value written to
  the MMIO register is returned. This function must guarantee that all MMIO
  read and write operations are serialized.

  If 16-bit MMIO register operations are not supported, then ASSERT().

  @param  Address The MMIO register to write.