MdePkg/Include/Library/S3PciLib.h

/** @file
  The PCI configuration Library Services that carry out PCI configuration and enable
  the PCI operations to be replayed during an S3 resume. This library class
  maps directly on top of the PciLib class.

  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>

  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.

**/

#ifndef __S3_PCI_LIB_H__
#define __S3_PCI_LIB_H__

/**
  Macro that converts PCI Bus, PCI Device, PCI Function and PCI Register to an
  address that can be passed to the S3 PCI Library functions.

  @param  Bus       The PCI Bus number. Range 0..255.
  @param  Device    The PCI Device number. Range 0..31.
  @param  Function  The PCI Function number. Range 0..7.
  @param  Register  The PCI Register number. Range 0..255 for PCI. Range 0..4095
                    for PCI Express.

  @return The encoded PCI address.

**/
#define S3_PCI_LIB_ADDRESS(Bus,Device,Function,Register)   \
  (((Register) & 0xfff) | (((Function) & 0x07) << 12) | (((Device) & 0x1f) << 15) | (((Bus) & 0xff) << 20))

/**

  Reads and returns the 8-bit PCI configuration register specified by Address,
  and saves the value in the S3 script to be replayed on S3 resume.
  This function must guarantee that all PCI read and write operations are
  serialized.

  If Address > 0x0FFFFFFF, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.

  @return   The value read from the PCI configuration register.

**/
UINT8
EFIAPI
S3PciRead8 (
  IN UINTN  Address
  );

/**
  Writes an 8-bit PCI configuration register, and saves the value in the S3
  script to be replayed on S3 resume.

  Writes the 8-bit PCI configuration register specified by Address with the
  value specified by Value. Value is returned. This function must guarantee
  that all PCI read and write operations are serialized.

  If Address > 0x0FFFFFFF, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] Value     The value to write.

  @return   The value written to the PCI configuration register.

**/
UINT8
EFIAPI
S3PciWrite8 (
  IN UINTN  Address,
  IN UINT8  Value
  );

/**
  Performs a bitwise OR of an 8-bit PCI configuration register with
  an 8-bit value, and saves the value in the S3 script to be replayed on S3 resume.

  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.

  If Address > 0x0FFFFFFF, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] OrData    The value to OR with the PCI configuration register.

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

**/
UINT8
EFIAPI
S3PciOr8 (
  IN UINTN  Address,
  IN UINT8  OrData
  );

/**
  Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit
  value, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 8-bit PCI configuration 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 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.

  If Address > 0x0FFFFFFF, then ASSERT().

  @param[in]  Address   The address that encodes the PCI Bus, Device, Function and
                        Register.
  @param[in]  AndData   The value to AND with the PCI configuration register.

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

**/
UINT8
EFIAPI
S3PciAnd8 (
  IN UINTN  Address,
  IN UINT8  AndData
  );

/**
  Performs a bitwise AND of an 8-bit PCI configuration register with an 8-bit
  value, followed a  bitwise OR with another 8-bit value, and saves
  the value in the S3 script to be replayed on S3 resume.

  Reads the 8-bit PCI configuration 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 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.

  If Address > 0x0FFFFFFF, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] AndData   The value to AND with the PCI configuration register.
  @param[in] OrData    The value to OR with the result of the AND operation.

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

**/
UINT8
EFIAPI
S3PciAndThenOr8 (
  IN UINTN  Address,
  IN UINT8  AndData,
  IN UINT8  OrData
  );

/**
  Reads a bit field of a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  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().

  @param[in] Address    The PCI configuration register to read.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..7.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..7.

  @return   The value of the bit field read from the PCI configuration register.

**/
UINT8
EFIAPI
S3PciBitFieldRead8 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit
  );

/**
  Writes a bit field to a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  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 Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..7.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..7.
  @param[in] Value      New value of the bit field.

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

**/
UINT8
EFIAPI
S3PciBitFieldWrite8 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit,
  IN UINT8  Value
  );

/**
  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, and saves the value
  in the S3 script to be replayed on S3 resume.

  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[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..7.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..7.
  @param[in] OrData     The value to OR with the PCI configuration register.

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

**/
UINT8
EFIAPI
S3PciBitFieldOr8 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit,
  IN UINT8  OrData
  );

/**
  Reads a bit field in an 8-bit PCI configuration register, performs a bitwise
  AND, and writes the result back to the bit field in the 8-bit register and
  saves the value in the S3 script to be replayed on S3 resume.

  Reads the 8-bit PCI configuration 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 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 AndData 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 AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..7.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..7.
  @param[in] AndData    The value to AND with the PCI configuration register.

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

**/
UINT8
EFIAPI
S3PciBitFieldAnd8 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit,
  IN UINT8  AndData
  );

/**
  Reads a bit field in an 8-bit Address, performs a bitwise AND followed by a
  bitwise OR, and writes the result back to the bit field in the
  8-bit port, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 8-bit PCI configuration register specified by Address, performs a
  bitwise AND followed by a bitwise OR between the read result and
  the value specified by AndData, 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 both AndData and
  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 AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..7.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..7.
  @param[in] AndData    The value to AND with the PCI configuration register.
  @param[in] OrData     The value to OR with the result of the AND operation.

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

**/
UINT8
EFIAPI
S3PciBitFieldAndThenOr8 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit,
  IN UINT8  AndData,
  IN UINT8  OrData
  );

/**
  Reads a 16-bit PCI configuration register, and saves the value in the S3
  script to be replayed on S3 resume.

  Reads and returns the 16-bit PCI configuration register specified by Address.
  This function must guarantee that all PCI read and write operations are
  serialized.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.

  @return   The read value from the PCI configuration register.

**/
UINT16
EFIAPI
S3PciRead16 (
  IN UINTN  Address
  );

/**
  Writes a 16-bit PCI configuration register, and saves the value in the S3
  script to be replayed on S3 resume.

  Writes the 16-bit PCI configuration register specified by Address with the
  value specified by Value. Value is returned. This function must guarantee
  that all PCI read and write operations are serialized.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] Value     The value to write.

  @return   The value written to the PCI configuration register.

**/
UINT16
EFIAPI
S3PciWrite16 (
  IN UINTN   Address,
  IN UINT16  Value
  );

/**
  Performs a bitwise OR of a 16-bit PCI configuration register with
  a 16-bit value, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 16-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 16-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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] OrData    The value to OR with the PCI configuration register.

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

**/
UINT16
EFIAPI
S3PciOr16 (
  IN UINTN   Address,
  IN UINT16  OrData
  );

/**
  Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
  value, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 16-bit PCI configuration 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 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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] AndData   The value to AND with the PCI configuration register.

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

**/
UINT16
EFIAPI
S3PciAnd16 (
  IN UINTN   Address,
  IN UINT16  AndData
  );

/**
  Performs a bitwise AND of a 16-bit PCI configuration register with a 16-bit
  value, followed a  bitwise OR with another 16-bit value, and saves
  the value in the S3 script to be replayed on S3 resume.

  Reads the 16-bit PCI configuration 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 16-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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] AndData   The value to AND with the PCI configuration register.
  @param[in] OrData    The value to OR with the result of the AND operation.

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

**/
UINT16
EFIAPI
S3PciAndThenOr16 (
  IN UINTN   Address,
  IN UINT16  AndData,
  IN UINT16  OrData
  );

/**
  Reads a bit field of a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, 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[in] Address    The PCI configuration register to read.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..15.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..15.

  @return   The value of the bit field read from the PCI configuration register.

**/
UINT16
EFIAPI
S3PciBitFieldRead16 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit
  );

/**
  Writes a bit field to a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, 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().
  If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..15.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..15.
  @param[in] Value      New value of the bit field.

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

**/
UINT16
EFIAPI
S3PciBitFieldWrite16 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT16  Value
  );

/**
  Reads a bit field in a 16-bit PCI configuration, performs a bitwise OR, and
  writes the result back to the bit field in the 16-bit port, and saves the value
  in the S3 script to be replayed on S3 resume.

  Reads the 16-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 16-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 Address is not aligned on a 16-bit boundary, 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().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..15.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..15.
  @param[in] OrData     The value to OR with the PCI configuration register.

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

**/
UINT16
EFIAPI
S3PciBitFieldOr16 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT16  OrData
  );

/**
  Reads a bit field in a 16-bit PCI configuration register, performs a bitwise
  AND, and writes the result back to the bit field in the 16-bit register and
  saves the value in the S3 script to be replayed on S3 resume.

  Reads the 16-bit PCI configuration 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 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 AndData are stripped.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, 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().
  If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..15.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..15.
  @param[in] AndData    The value to AND with the PCI configuration register.

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

**/
UINT16
EFIAPI
S3PciBitFieldAnd16 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT16  AndData
  );

/**
  Reads a bit field in a 16-bit Address, performs a bitwise AND followed by a
  bitwise OR, and writes the result back to the bit field in the
  16-bit port, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 16-bit PCI configuration register specified by Address, performs a
  bitwise AND followed by a bitwise OR between the read result and
  the value specified by AndData, and writes the result to the 16-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 both AndData and
  OrData are stripped.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 16-bit boundary, 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().
  If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..15.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..15.
  @param[in] AndData    The value to AND with the PCI configuration register.
  @param[in] OrData     The value to OR with the result of the AND operation.

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

**/
UINT16
EFIAPI
S3PciBitFieldAndThenOr16 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT16  AndData,
  IN UINT16  OrData
  );

/**
  Reads a 32-bit PCI configuration register, and saves the value in the S3
  script to be replayed on S3 resume.

  Reads and returns the 32-bit PCI configuration register specified by Address.
  This function must guarantee that all PCI read and write operations are
  serialized.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.

  @return   The read value from the PCI configuration register.

**/
UINT32
EFIAPI
S3PciRead32 (
  IN UINTN  Address
  );

/**
  Writes a 32-bit PCI configuration register, and saves the value in the S3
  script to be replayed on S3 resume.

  Writes the 32-bit PCI configuration register specified by Address with the
  value specified by Value. Value is returned. This function must guarantee
  that all PCI read and write operations are serialized.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] Value     The value to write.

  @return   The value written to the PCI configuration register.

**/
UINT32
EFIAPI
S3PciWrite32 (
  IN UINTN   Address,
  IN UINT32  Value
  );

/**
  Performs a bitwise OR of a 32-bit PCI configuration register with
  a 32-bit value, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 32-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 32-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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] OrData    The value to OR with the PCI configuration register.

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

**/
UINT32
EFIAPI
S3PciOr32 (
  IN UINTN   Address,
  IN UINT32  OrData
  );

/**
  Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit
  value, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 32-bit PCI configuration register specified by Address, performs a
  bitwise AND between the read result and the value specified by AndData, and
  writes the result to the 32-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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] AndData   The value to AND with the PCI configuration register.

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

**/
UINT32
EFIAPI
S3PciAnd32 (
  IN UINTN   Address,
  IN UINT32  AndData
  );

/**
  Performs a bitwise AND of a 32-bit PCI configuration register with a 32-bit
  value, followed a  bitwise OR with another 32-bit value, and saves
  the value in the S3 script to be replayed on S3 resume.

  Reads the 32-bit PCI configuration 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 32-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.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, then ASSERT().

  @param[in] Address   The address that encodes the PCI Bus, Device, Function and
                       Register.
  @param[in] AndData   The value to AND with the PCI configuration register.
  @param[in] OrData    The value to OR with the result of the AND operation.

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

**/
UINT32
EFIAPI
S3PciAndThenOr32 (
  IN UINTN   Address,
  IN UINT32  AndData,
  IN UINT32  OrData
  );

/**
  Reads a bit field of a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, 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[in] Address    The PCI configuration register to read.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..31.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..31.

  @return   The value of the bit field read from the PCI configuration register.

**/
UINT32
EFIAPI
S3PciBitFieldRead32 (
  IN UINTN  Address,
  IN UINTN  StartBit,
  IN UINTN  EndBit
  );

/**
  Writes a bit field to a PCI configuration register, and saves the value in
  the S3 script to be replayed on S3 resume.

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

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, 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().
  If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..31.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..31.
  @param[in] Value      New value of the bit field.

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

**/
UINT32
EFIAPI
S3PciBitFieldWrite32 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT32  Value
  );

/**
  Reads a bit field in a 32-bit PCI configuration, performs a bitwise OR, and
  writes the result back to the bit field in the 32-bit port, and saves the value
  in the S3 script to be replayed on S3 resume.

  Reads the 32-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 32-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 Address is not aligned on a 32-bit boundary, 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().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..31.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..31.
  @param[in] OrData     The value to OR with the PCI configuration register.

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

**/
UINT32
EFIAPI
S3PciBitFieldOr32 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT32  OrData
  );

/**
  Reads a bit field in a 32-bit PCI configuration register, performs a bitwise
  AND, and writes the result back to the bit field in the 32-bit register and
  saves the value in the S3 script to be replayed on S3 resume.

  Reads the 32-bit PCI configuration register specified by Address, performs a
  bitwise AND between the read result and the value specified by AndData, and
  writes the result to the 32-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 AndData are stripped.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, 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().
  If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..31.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..31.
  @param[in] AndData    The value to AND with the PCI configuration register.

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

**/
UINT32
EFIAPI
S3PciBitFieldAnd32 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT32  AndData
  );

/**
  Reads a bit field in a 32-bit Address, performs a bitwise AND followed by a
  bitwise OR, and writes the result back to the bit field in the
  32-bit port, and saves the value in the S3 script to be replayed on S3 resume.

  Reads the 32-bit PCI configuration register specified by Address, performs a
  bitwise AND followed by a bitwise OR between the read result and
  the value specified by AndData, and writes the result to the 32-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 both AndData and
  OrData are stripped.

  If Address > 0x0FFFFFFF, then ASSERT().
  If Address is not aligned on a 32-bit boundary, 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().
  If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().
  If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT().

  @param[in] Address    The PCI configuration register to write.
  @param[in] StartBit   The ordinal of the least significant bit in the bit field.
                        Range 0..31.
  @param[in] EndBit     The ordinal of the most significant bit in the bit field.
                        Range 0..31.
  @param[in] AndData    The value to AND with the PCI configuration register.
  @param[in] OrData     The value to OR with the result of the AND operation.

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

**/
UINT32
EFIAPI
S3PciBitFieldAndThenOr32 (
  IN UINTN   Address,
  IN UINTN   StartBit,
  IN UINTN   EndBit,
  IN UINT32  AndData,
  IN UINT32  OrData
  );

/**
  Reads a range of PCI configuration registers into a caller supplied buffer,
  and saves the value in the S3 script to be replayed on S3 resume.

  Reads the range of PCI configuration registers specified by StartAddress and
  Size into the buffer specified by Buffer. This function only allows the PCI
  configuration registers from a single PCI function to be read. Size is
  returned. When possible 32-bit PCI configuration read cycles are used to read
  from StartAdress to StartAddress + Size. Due to alignment restrictions, 8-bit
  and 16-bit PCI configuration read cycles may be used at the beginning and the
  end of the range.

  If StartAddress > 0x0FFFFFFF, then ASSERT().
  If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
  If Size > 0 and Buffer is NULL, then ASSERT().

  @param[in]  StartAddress   Starting address that encodes the PCI Bus, Device,
                             Function and Register.
  @param[in]  Size           Size in bytes of the transfer.
  @param[out] Buffer         The pointer to a buffer receiving the data read.

  @return   Size.

**/
UINTN
EFIAPI
S3PciReadBuffer (
  IN  UINTN  StartAddress,
  IN  UINTN  Size,
  OUT VOID   *Buffer
  );

/**
  Copies the data in a caller supplied buffer to a specified range of PCI
  configuration space, and saves the value in the S3 script to be replayed on S3
  resume.

  Writes the range of PCI configuration registers specified by StartAddress and
  Size from the buffer specified by Buffer. This function only allows the PCI
  configuration registers from a single PCI function to be written. Size is
  returned. When possible 32-bit PCI configuration write cycles are used to
  write from StartAdress to StartAddress + Size. Due to alignment restrictions,
  8-bit and 16-bit PCI configuration write cycles may be used at the beginning
  and the end of the range.

  If StartAddress > 0x0FFFFFFF, then ASSERT().
  If ((StartAddress & 0xFFF) + Size) > 0x1000, then ASSERT().
  If Size > 0 and Buffer is NULL, then ASSERT().

  @param[in] StartAddress   Starting address that encodes the PCI Bus, Device,
                            Function and Register.
  @param[in] Size           Size in bytes of the transfer.
  @param[in] Buffer         The pointer to a buffer containing the data to write.

  @return   Size.

**/
UINTN
EFIAPI
S3PciWriteBuffer (
  IN UINTN  StartAddress,
  IN UINTN  Size,
  IN VOID   *Buffer
  );

#endif