コード例 #1
0
ファイル: PciLib.c プロジェクト: hsienchieh/uefilab
/**
  Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, and
  writes the result back to the bit field in the 8-bit port.

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

  If Address > 0x0FFFFFFF, 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().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param  Address   The PCI configuration 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 the PCI configuration register.

  @return The value written back to the PCI configuration register.

**/
UINT8
EFIAPI
PciBitFieldOr8 (
  IN      UINTN                     Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     OrData
  )
{
  return PciWrite8 (
           Address,
           BitFieldOr8 (PciRead8 (Address), StartBit, EndBit, OrData)
           );
}
コード例 #2
0
ファイル: PciLib.c プロジェクト: AshleyDeSimone/edk2
/**
  Reads a bit field in an 8-bit PCI configuration, performs a bitwise OR, and
  writes the result back to the bit field in the 8-bit port.

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

  If any reserved bits in Address are set, 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   PCI configuration 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 the PCI configuration register.

  @return The value written back to the PCI configuration register.

**/
UINT8
EFIAPI
PciSegmentBitFieldOr8 (
  IN      UINT64                    Address,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     OrData
  )
{
  return PciSegmentWrite8 (
           Address,
           BitFieldOr8 (PciSegmentRead8 (Address), StartBit, EndBit, OrData)
           );
}
コード例 #3
0
ファイル: BitField.c プロジェクト: Kohrara/edk
/**
  Reads a bit field from an 8-bit value, performs a bitwise AND followed by a
  bitwise OR, and returns the result.

  Performs a bitwise AND between the bit field specified by StartBit and EndBit
  in Operand and the value specified by AndData, followed by a bitwise
  inclusive OR with value specified by OrData. All other bits in Operand are
  preserved. The new 8-bit value is returned.

  If 8-bit 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  Operand   Operand on which to perform the bitfield operation.
  @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 value.
  @param  OrData    The value to OR with the result of the AND operation.

  @return The new 8-bit value.

**/
UINT8
EFIAPI
BitFieldAndThenOr8 (
  IN      UINT8                     Operand,
  IN      UINTN                     StartBit,
  IN      UINTN                     EndBit,
  IN      UINT8                     AndData,
  IN      UINT8                     OrData
  )
{
  ASSERT (EndBit < sizeof (Operand) * 8);
  ASSERT (StartBit <= EndBit);
  return BitFieldOr8 (
           BitFieldAnd8 (Operand, StartBit, EndBit, AndData),
           StartBit,
           EndBit,
           OrData
           );
}