path: root/MdePkg/Include/IndustryStandard/Pci22.h

/** @file
  Support for PCI 2.2 standard.

  This file includes the definitions in the following specifications,
    PCI Local Bus Specification, 2.2
    PCI-to-PCI Bridge Architecture Specification, Revision 1.2
    PC Card Standard, 8.0
    PCI Power Management Interface Specification, Revision 1.2

  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  Copyright (c) 2014 - 2015, Hewlett-Packard Development Company, L.P.<BR>
  SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#ifndef _PCI22_H_
#define _PCI22_H_

#define PCI_MAX_BUS     255
#define PCI_MAX_DEVICE  31
#define PCI_MAX_FUNC    7

#pragma pack(1)

///
/// Common header region in PCI Configuration Space
/// Section 6.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  UINT16    VendorId;
  UINT16    DeviceId;
  UINT16    Command;
  UINT16    Status;
  UINT8     RevisionID;
  UINT8     ClassCode[3];
  UINT8     CacheLineSize;
  UINT8     LatencyTimer;
  UINT8     HeaderType;
  UINT8     BIST;
} PCI_DEVICE_INDEPENDENT_REGION;

///
/// PCI Device header region in PCI Configuration Space
/// Section 6.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  UINT32    Bar[6];
  UINT32    CISPtr;
  UINT16    SubsystemVendorID;
  UINT16    SubsystemID;
  UINT32    ExpansionRomBar;
  UINT8     CapabilityPtr;
  UINT8     Reserved1[3];
  UINT32    Reserved2;
  UINT8     InterruptLine;
  UINT8     InterruptPin;
  UINT8     MinGnt;
  UINT8     MaxLat;
} PCI_DEVICE_HEADER_TYPE_REGION;

///
/// PCI Device Configuration Space
/// Section 6.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  PCI_DEVICE_INDEPENDENT_REGION    Hdr;
  PCI_DEVICE_HEADER_TYPE_REGION    Device;
} PCI_TYPE00;

///
/// PCI-PCI Bridge header region in PCI Configuration Space
/// Section 3.2, PCI-PCI Bridge Architecture, Version 1.2
///
typedef struct {
  UINT32    Bar[2];
  UINT8     PrimaryBus;
  UINT8     SecondaryBus;
  UINT8     SubordinateBus;
  UINT8     SecondaryLatencyTimer;
  UINT8     IoBase;
  UINT8     IoLimit;
  UINT16    SecondaryStatus;
  UINT16    MemoryBase;
  UINT16    MemoryLimit;
  UINT16    PrefetchableMemoryBase;
  UINT16    PrefetchableMemoryLimit;
  UINT32    PrefetchableBaseUpper32;
  UINT32    PrefetchableLimitUpper32;
  UINT16    IoBaseUpper16;
  UINT16    IoLimitUpper16;
  UINT8     CapabilityPtr;
  UINT8     Reserved[3];
  UINT32    ExpansionRomBAR;
  UINT8     InterruptLine;
  UINT8     InterruptPin;
  UINT16    BridgeControl;
} PCI_BRIDGE_CONTROL_REGISTER;

///
/// PCI-to-PCI Bridge Configuration Space
/// Section 3.2, PCI-PCI Bridge Architecture, Version 1.2
///
typedef struct {
  PCI_DEVICE_INDEPENDENT_REGION    Hdr;
  PCI_BRIDGE_CONTROL_REGISTER      Bridge;
} PCI_TYPE01;

typedef union {
  PCI_TYPE00    Device;
  PCI_TYPE01    Bridge;
} PCI_TYPE_GENERIC;

///
/// CardBus Controller Configuration Space,
/// Section 4.5.1, PC Card Standard. 8.0
///
typedef struct {
  UINT32    CardBusSocketReg;   ///< Cardbus Socket/ExCA Base
  UINT8     Cap_Ptr;
  UINT8     Reserved;
  UINT16    SecondaryStatus;      ///< Secondary Status
  UINT8     PciBusNumber;         ///< PCI Bus Number
  UINT8     CardBusBusNumber;     ///< CardBus Bus Number
  UINT8     SubordinateBusNumber; ///< Subordinate Bus Number
  UINT8     CardBusLatencyTimer;  ///< CardBus Latency Timer
  UINT32    MemoryBase0;          ///< Memory Base Register 0
  UINT32    MemoryLimit0;         ///< Memory Limit Register 0
  UINT32    MemoryBase1;
  UINT32    MemoryLimit1;
  UINT32    IoBase0;
  UINT32    IoLimit0;           ///< I/O Base Register 0
  UINT32    IoBase1;            ///< I/O Limit Register 0
  UINT32    IoLimit1;
  UINT8     InterruptLine;      ///< Interrupt Line
  UINT8     InterruptPin;       ///< Interrupt Pin
  UINT16    BridgeControl;      ///< Bridge Control
} PCI_CARDBUS_CONTROL_REGISTER;

//
// Definitions of PCI class bytes and manipulation macros.
//
#define PCI_CLASS_OLD          0x00
#define   PCI_CLASS_OLD_OTHER  0x00
#define   PCI_CLASS_OLD_VGA    0x01

#define PCI_CLASS_MASS_STORAGE           0x01
#define   PCI_CLASS_MASS_STORAGE_SCSI    0x00
#define   PCI_CLASS_MASS_STORAGE_IDE     0x01
#define   PCI_CLASS_MASS_STORAGE_FLOPPY  0x02
#define   PCI_CLASS_MASS_STORAGE_IPI     0x03
#define   PCI_CLASS_MASS_STORAGE_RAID    0x04
#define   PCI_CLASS_MASS_STORAGE_OTHER   0x80

#define PCI_CLASS_NETWORK              0x02
#define   PCI_CLASS_NETWORK_ETHERNET   0x00
#define   PCI_CLASS_NETWORK_TOKENRING  0x01
#define   PCI_CLASS_NETWORK_FDDI       0x02
#define   PCI_CLASS_NETWORK_ATM        0x03
#define   PCI_CLASS_NETWORK_ISDN       0x04
#define   PCI_CLASS_NETWORK_OTHER      0x80

#define PCI_CLASS_DISPLAY          0x03
#define   PCI_CLASS_DISPLAY_VGA    0x00
#define     PCI_IF_VGA_VGA         0x00
#define     PCI_IF_VGA_8514        0x01
#define   PCI_CLASS_DISPLAY_XGA    0x01
#define   PCI_CLASS_DISPLAY_3D     0x02
#define   PCI_CLASS_DISPLAY_OTHER  0x80

#define PCI_CLASS_MEDIA              0x04
#define   PCI_CLASS_MEDIA_VIDEO      0x00
#define   PCI_CLASS_MEDIA_AUDIO      0x01
#define   PCI_CLASS_MEDIA_TELEPHONE  0x02
#define   PCI_CLASS_MEDIA_OTHER      0x80

#define PCI_CLASS_MEMORY_CONTROLLER  0x05
#define   PCI_CLASS_MEMORY_RAM       0x00
#define   PCI_CLASS_MEMORY_FLASH     0x01
#define   PCI_CLASS_MEMORY_OTHER     0x80

#define PCI_CLASS_BRIDGE                   0x06
#define   PCI_CLASS_BRIDGE_HOST            0x00
#define   PCI_CLASS_BRIDGE_ISA             0x01
#define   PCI_CLASS_BRIDGE_EISA            0x02
#define   PCI_CLASS_BRIDGE_MCA             0x03
#define   PCI_CLASS_BRIDGE_P2P             0x04
#define     PCI_IF_BRIDGE_P2P              0x00
#define     PCI_IF_BRIDGE_P2P_SUBTRACTIVE  0x01
#define   PCI_CLASS_BRIDGE_PCMCIA          0x05
#define   PCI_CLASS_BRIDGE_NUBUS           0x06
#define   PCI_CLASS_BRIDGE_CARDBUS         0x07
#define   PCI_CLASS_BRIDGE_RACEWAY         0x08
#define   PCI_CLASS_BRIDGE_OTHER           0x80
#define   PCI_CLASS_BRIDGE_ISA_PDECODE     0x80

#define PCI_CLASS_SCC                    0x07///< Simple communications controllers
#define   PCI_SUBCLASS_SERIAL            0x00
#define     PCI_IF_GENERIC_XT            0x00
#define     PCI_IF_16450                 0x01
#define     PCI_IF_16550                 0x02
#define     PCI_IF_16650                 0x03
#define     PCI_IF_16750                 0x04
#define     PCI_IF_16850                 0x05
#define     PCI_IF_16950                 0x06
#define   PCI_SUBCLASS_PARALLEL          0x01
#define     PCI_IF_PARALLEL_PORT         0x00
#define     PCI_IF_BI_DIR_PARALLEL_PORT  0x01
#define     PCI_IF_ECP_PARALLEL_PORT     0x02
#define     PCI_IF_1284_CONTROLLER       0x03
#define     PCI_IF_1284_DEVICE           0xFE
#define   PCI_SUBCLASS_MULTIPORT_SERIAL  0x02
#define   PCI_SUBCLASS_MODEM             0x03
#define     PCI_IF_GENERIC_MODEM         0x00
#define     PCI_IF_16450_MODEM           0x01
#define     PCI_IF_16550_MODEM           0x02
#define     PCI_IF_16650_MODEM           0x03
#define     PCI_IF_16750_MODEM           0x04
#define   PCI_SUBCLASS_SCC_OTHER         0x80

#define PCI_CLASS_SYSTEM_PERIPHERAL      0x08
#define   PCI_SUBCLASS_PIC               0x00
#define     PCI_IF_8259_PIC              0x00
#define     PCI_IF_ISA_PIC               0x01
#define     PCI_IF_EISA_PIC              0x02
#define     PCI_IF_APIC_CONTROLLER       0x10   ///< I/O APIC interrupt controller , 32 byte none-prefetchable memory.
#define     PCI_IF_APIC_CONTROLLER2      0x20
#define   PCI_SUBCLASS_DMA               0x01
#define     PCI_IF_8237_DMA              0x00
#define     PCI_IF_ISA_DMA               0x01
#define     PCI_IF_EISA_DMA              0x02
#define   PCI_SUBCLASS_TIMER             0x02
#define     PCI_IF_8254_TIMER            0x00
#define     PCI_IF_ISA_TIMER             0x01
#define     PCI_IF_EISA_TIMER            0x02
#define   PCI_SUBCLASS_RTC               0x03
#define     PCI_IF_GENERIC_RTC           0x00
#define     PCI_IF_ISA_RTC               0x01
#define   PCI_SUBCLASS_PNP_CONTROLLER    0x04   ///< HotPlug Controller
#define   PCI_SUBCLASS_PERIPHERAL_OTHER  0x80

#define PCI_CLASS_INPUT_DEVICE           0x09
#define   PCI_SUBCLASS_KEYBOARD          0x00
#define   PCI_SUBCLASS_PEN               0x01
#define   PCI_SUBCLASS_MOUSE_CONTROLLER  0x02
#define   PCI_SUBCLASS_SCAN_CONTROLLER   0x03
#define   PCI_SUBCLASS_GAMEPORT          0x04
#define     PCI_IF_GAMEPORT              0x00
#define     PCI_IF_GAMEPORT1             0x10
#define   PCI_SUBCLASS_INPUT_OTHER       0x80

#define PCI_CLASS_DOCKING_STATION       0x0A
#define   PCI_SUBCLASS_DOCKING_GENERIC  0x00
#define   PCI_SUBCLASS_DOCKING_OTHER    0x80

#define PCI_CLASS_PROCESSOR          0x0B
#define   PCI_SUBCLASS_PROC_386      0x00
#define   PCI_SUBCLASS_PROC_486      0x01
#define   PCI_SUBCLASS_PROC_PENTIUM  0x02
#define   PCI_SUBCLASS_PROC_ALPHA    0x10
#define   PCI_SUBCLASS_PROC_POWERPC  0x20
#define   PCI_SUBCLASS_PROC_MIPS     0x30
#define   PCI_SUBCLASS_PROC_CO_PORC  0x40    ///< Co-Processor

#define PCI_CLASS_SERIAL                 0x0C
#define   PCI_CLASS_SERIAL_FIREWIRE      0x00
#define     PCI_IF_1394                  0x00
#define     PCI_IF_1394_OPEN_HCI         0x10
#define   PCI_CLASS_SERIAL_ACCESS_BUS    0x01
#define   PCI_CLASS_SERIAL_SSA           0x02
#define   PCI_CLASS_SERIAL_USB           0x03
#define     PCI_IF_UHCI                  0x00
#define     PCI_IF_OHCI                  0x10
#define     PCI_IF_USB_OTHER             0x80
#define     PCI_IF_USB_DEVICE            0xFE
#define   PCI_CLASS_SERIAL_FIBRECHANNEL  0x04
#define   PCI_CLASS_SERIAL_SMB           0x05

#define PCI_CLASS_WIRELESS             0x0D
#define   PCI_SUBCLASS_IRDA            0x00
#define   PCI_SUBCLASS_IR              0x01
#define   PCI_SUBCLASS_RF              0x10
#define   PCI_SUBCLASS_WIRELESS_OTHER  0x80

#define PCI_CLASS_INTELLIGENT_IO  0x0E

#define PCI_CLASS_SATELLITE   0x0F
#define   PCI_SUBCLASS_TV     0x01
#define   PCI_SUBCLASS_AUDIO  0x02
#define   PCI_SUBCLASS_VOICE  0x03
#define   PCI_SUBCLASS_DATA   0x04

#define PCI_SECURITY_CONTROLLER        0x10  ///< Encryption and decryption controller
#define   PCI_SUBCLASS_NET_COMPUT      0x00
#define   PCI_SUBCLASS_ENTERTAINMENT   0x10
#define   PCI_SUBCLASS_SECURITY_OTHER  0x80

#define PCI_CLASS_DPIO             0x11
#define   PCI_SUBCLASS_DPIO        0x00
#define   PCI_SUBCLASS_DPIO_OTHER  0x80

/**
  Macro that checks whether the Base Class code of device matched.

  @param  _p      Specified device.
  @param  c       Base Class code needs matching.

  @retval TRUE    Base Class code matches the specified device.
  @retval FALSE   Base Class code doesn't match the specified device.

**/
#define IS_CLASS1(_p, c)  ((_p)->Hdr.ClassCode[2] == (c))

/**
  Macro that checks whether the Base Class code and Sub-Class code of device matched.

  @param  _p      Specified device.
  @param  c       Base Class code needs matching.
  @param  s       Sub-Class code needs matching.

  @retval TRUE    Base Class code and Sub-Class code match the specified device.
  @retval FALSE   Base Class code and Sub-Class code don't match the specified device.

**/
#define IS_CLASS2(_p, c, s)  (IS_CLASS1 (_p, c) && ((_p)->Hdr.ClassCode[1] == (s)))

/**
  Macro that checks whether the Base Class code, Sub-Class code and Interface code of device matched.

  @param  _p      Specified device.
  @param  c       Base Class code needs matching.
  @param  s       Sub-Class code needs matching.
  @param  p       Interface code needs matching.

  @retval TRUE    Base Class code, Sub-Class code and Interface code match the specified device.
  @retval FALSE   Base Class code, Sub-Class code and Interface code don't match the specified device.

**/
#define IS_CLASS3(_p, c, s, p)  (IS_CLASS2 (_p, c, s) && ((_p)->Hdr.ClassCode[0] == (p)))

/**
  Macro that checks whether device is a display controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a display controller.
  @retval FALSE   Device is not a display controller.

**/
#define IS_PCI_DISPLAY(_p)  IS_CLASS1 (_p, PCI_CLASS_DISPLAY)

/**
  Macro that checks whether device is a VGA-compatible controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a VGA-compatible controller.
  @retval FALSE   Device is not a VGA-compatible controller.

**/
#define IS_PCI_VGA(_p)  IS_CLASS3 (_p, PCI_CLASS_DISPLAY, PCI_CLASS_DISPLAY_VGA, PCI_IF_VGA_VGA)

/**
  Macro that checks whether device is an 8514-compatible controller.

  @param  _p      Specified device.

  @retval TRUE    Device is an 8514-compatible controller.
  @retval FALSE   Device is not an 8514-compatible controller.

**/
#define IS_PCI_8514(_p)  IS_CLASS3 (_p, PCI_CLASS_DISPLAY, PCI_CLASS_DISPLAY_VGA, PCI_IF_VGA_8514)

/**
  Macro that checks whether device is built before the Class Code field was defined.

  @param  _p      Specified device.

  @retval TRUE    Device is an old device.
  @retval FALSE   Device is not an old device.

**/
#define IS_PCI_OLD(_p)  IS_CLASS1 (_p, PCI_CLASS_OLD)

/**
  Macro that checks whether device is a VGA-compatible device built before the Class Code field was defined.

  @param  _p      Specified device.

  @retval TRUE    Device is an old VGA-compatible device.
  @retval FALSE   Device is not an old VGA-compatible device.

**/
#define IS_PCI_OLD_VGA(_p)  IS_CLASS2 (_p, PCI_CLASS_OLD, PCI_CLASS_OLD_VGA)

/**
  Macro that checks whether device is an IDE controller.

  @param  _p      Specified device.

  @retval TRUE    Device is an IDE controller.
  @retval FALSE   Device is not an IDE controller.

**/
#define IS_PCI_IDE(_p)  IS_CLASS2 (_p, PCI_CLASS_MASS_STORAGE, PCI_CLASS_MASS_STORAGE_IDE)

/**
  Macro that checks whether device is a SCSI bus controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a SCSI bus controller.
  @retval FALSE   Device is not a SCSI bus controller.

**/
#define IS_PCI_SCSI(_p)  IS_CLASS2 (_p, PCI_CLASS_MASS_STORAGE, PCI_CLASS_MASS_STORAGE_SCSI)

/**
  Macro that checks whether device is a RAID controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a RAID controller.
  @retval FALSE   Device is not a RAID controller.

**/
#define IS_PCI_RAID(_p)  IS_CLASS2 (_p, PCI_CLASS_MASS_STORAGE, PCI_CLASS_MASS_STORAGE_RAID)

/**
  Macro that checks whether device is an ISA bridge.

  @param  _p      Specified device.

  @retval TRUE    Device is an ISA bridge.
  @retval FALSE   Device is not an ISA bridge.

**/
#define IS_PCI_LPC(_p)  IS_CLASS2 (_p, PCI_CLASS_BRIDGE, PCI_CLASS_BRIDGE_ISA)

/**
  Macro that checks whether device is a PCI-to-PCI bridge.

  @param  _p      Specified device.

  @retval TRUE    Device is a PCI-to-PCI bridge.
  @retval FALSE   Device is not a PCI-to-PCI bridge.

**/
#define IS_PCI_P2P(_p)  IS_CLASS3 (_p, PCI_CLASS_BRIDGE, PCI_CLASS_BRIDGE_P2P, PCI_IF_BRIDGE_P2P)

/**
  Macro that checks whether device is a Subtractive Decode PCI-to-PCI bridge.

  @param  _p      Specified device.

  @retval TRUE    Device is a Subtractive Decode PCI-to-PCI bridge.
  @retval FALSE   Device is not a Subtractive Decode PCI-to-PCI bridge.

**/
#define IS_PCI_P2P_SUB(_p)  IS_CLASS3 (_p, PCI_CLASS_BRIDGE, PCI_CLASS_BRIDGE_P2P, PCI_IF_BRIDGE_P2P_SUBTRACTIVE)

/**
  Macro that checks whether device is a 16550-compatible serial controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a 16550-compatible serial controller.
  @retval FALSE   Device is not a 16550-compatible serial controller.

**/
#define IS_PCI_16550_SERIAL(_p)  IS_CLASS3 (_p, PCI_CLASS_SCC, PCI_SUBCLASS_SERIAL, PCI_IF_16550)

/**
  Macro that checks whether device is a Universal Serial Bus controller.

  @param  _p      Specified device.

  @retval TRUE    Device is a Universal Serial Bus controller.
  @retval FALSE   Device is not a Universal Serial Bus controller.

**/
#define IS_PCI_USB(_p)  IS_CLASS2 (_p, PCI_CLASS_SERIAL, PCI_CLASS_SERIAL_USB)

//
// the definition of Header Type
//
#define HEADER_TYPE_DEVICE             0x00
#define HEADER_TYPE_PCI_TO_PCI_BRIDGE  0x01
#define HEADER_TYPE_CARDBUS_BRIDGE     0x02
#define HEADER_TYPE_MULTI_FUNCTION     0x80
//
// Mask of Header type
//
#define HEADER_LAYOUT_CODE  0x7f

/**
  Macro that checks whether device is a PCI-PCI bridge.

  @param  _p      Specified device.

  @retval TRUE    Device is a PCI-PCI bridge.
  @retval FALSE   Device is not a PCI-PCI bridge.

**/
#define IS_PCI_BRIDGE(_p)  (((_p)->Hdr.HeaderType & HEADER_LAYOUT_CODE) == (HEADER_TYPE_PCI_TO_PCI_BRIDGE))

/**
  Macro that checks whether device is a CardBus bridge.

  @param  _p      Specified device.

  @retval TRUE    Device is a CardBus bridge.
  @retval FALSE   Device is not a CardBus bridge.

**/
#define IS_CARDBUS_BRIDGE(_p)  (((_p)->Hdr.HeaderType & HEADER_LAYOUT_CODE) == (HEADER_TYPE_CARDBUS_BRIDGE))

/**
  Macro that checks whether device is a multiple functions device.

  @param  _p      Specified device.

  @retval TRUE    Device is a multiple functions device.
  @retval FALSE   Device is not a multiple functions device.

**/
#define IS_PCI_MULTI_FUNC(_p)  ((_p)->Hdr.HeaderType & HEADER_TYPE_MULTI_FUNCTION)

///
/// Rom Base Address in Bridge, defined in PCI-to-PCI Bridge Architecture Specification,
///
#define PCI_BRIDGE_ROMBAR  0x38

#define PCI_MAX_BAR            0x0006
#define PCI_MAX_CONFIG_OFFSET  0x0100

#define PCI_VENDOR_ID_OFFSET            0x00
#define PCI_DEVICE_ID_OFFSET            0x02
#define PCI_COMMAND_OFFSET              0x04
#define PCI_PRIMARY_STATUS_OFFSET       0x06
#define PCI_REVISION_ID_OFFSET          0x08
#define PCI_CLASSCODE_OFFSET            0x09
#define PCI_CACHELINE_SIZE_OFFSET       0x0C
#define PCI_LATENCY_TIMER_OFFSET        0x0D
#define PCI_HEADER_TYPE_OFFSET          0x0E
#define PCI_BIST_OFFSET                 0x0F
#define PCI_BASE_ADDRESSREG_OFFSET      0x10
#define PCI_CARDBUS_CIS_OFFSET          0x28
#define PCI_SVID_OFFSET                 0x2C             ///< SubSystem Vendor id
#define PCI_SUBSYSTEM_VENDOR_ID_OFFSET  0x2C
#define PCI_SID_OFFSET                  0x2E             ///< SubSystem ID
#define PCI_SUBSYSTEM_ID_OFFSET         0x2E
#define PCI_EXPANSION_ROM_BASE          0x30
#define PCI_CAPBILITY_POINTER_OFFSET    0x34
#define PCI_INT_LINE_OFFSET             0x3C             ///< Interrupt Line Register
#define PCI_INT_PIN_OFFSET              0x3D             ///< Interrupt Pin Register
#define PCI_MAXGNT_OFFSET               0x3E             ///< Max Grant Register
#define PCI_MAXLAT_OFFSET               0x3F             ///< Max Latency Register

//
// defined in PCI-to-PCI Bridge Architecture Specification
//
#define PCI_BRIDGE_PRIMARY_BUS_REGISTER_OFFSET      0x18
#define PCI_BRIDGE_SECONDARY_BUS_REGISTER_OFFSET    0x19
#define PCI_BRIDGE_SUBORDINATE_BUS_REGISTER_OFFSET  0x1a
#define PCI_BRIDGE_SECONDARY_LATENCY_TIMER_OFFSET   0x1b
#define PCI_BRIDGE_STATUS_REGISTER_OFFSET           0x1E
#define PCI_BRIDGE_CONTROL_REGISTER_OFFSET          0x3E

///
/// Interrupt Line "Unknown" or "No connection" value defined for x86 based system
///
#define PCI_INT_LINE_UNKNOWN  0xFF

///
/// PCI Access Data Format
///
typedef union {
  struct {
    UINT32    Reg      : 8;
    UINT32    Func     : 3;
    UINT32    Dev      : 5;
    UINT32    Bus      : 8;
    UINT32    Reserved : 7;
    UINT32    Enable   : 1;
  } Bits;
  UINT32    Uint32;
} PCI_CONFIG_ACCESS_CF8;

#pragma pack()

#define EFI_PCI_COMMAND_IO_SPACE                     BIT0      ///< 0x0001
#define EFI_PCI_COMMAND_MEMORY_SPACE                 BIT1      ///< 0x0002
#define EFI_PCI_COMMAND_BUS_MASTER                   BIT2      ///< 0x0004
#define EFI_PCI_COMMAND_SPECIAL_CYCLE                BIT3      ///< 0x0008
#define EFI_PCI_COMMAND_MEMORY_WRITE_AND_INVALIDATE  BIT4      ///< 0x0010
#define EFI_PCI_COMMAND_VGA_PALETTE_SNOOP            BIT5      ///< 0x0020
#define EFI_PCI_COMMAND_PARITY_ERROR_RESPOND         BIT6      ///< 0x0040
#define EFI_PCI_COMMAND_STEPPING_CONTROL             BIT7      ///< 0x0080
#define EFI_PCI_COMMAND_SERR                         BIT8      ///< 0x0100
#define EFI_PCI_COMMAND_FAST_BACK_TO_BACK            BIT9      ///< 0x0200

//
// defined in PCI-to-PCI Bridge Architecture Specification
//
#define EFI_PCI_BRIDGE_CONTROL_PARITY_ERROR_RESPONSE    BIT0   ///< 0x0001
#define EFI_PCI_BRIDGE_CONTROL_SERR                     BIT1   ///< 0x0002
#define EFI_PCI_BRIDGE_CONTROL_ISA                      BIT2   ///< 0x0004
#define EFI_PCI_BRIDGE_CONTROL_VGA                      BIT3   ///< 0x0008
#define EFI_PCI_BRIDGE_CONTROL_VGA_16                   BIT4   ///< 0x0010
#define EFI_PCI_BRIDGE_CONTROL_MASTER_ABORT             BIT5   ///< 0x0020
#define EFI_PCI_BRIDGE_CONTROL_RESET_SECONDARY_BUS      BIT6   ///< 0x0040
#define EFI_PCI_BRIDGE_CONTROL_FAST_BACK_TO_BACK        BIT7   ///< 0x0080
#define EFI_PCI_BRIDGE_CONTROL_PRIMARY_DISCARD_TIMER    BIT8   ///< 0x0100
#define EFI_PCI_BRIDGE_CONTROL_SECONDARY_DISCARD_TIMER  BIT9   ///< 0x0200
#define EFI_PCI_BRIDGE_CONTROL_TIMER_STATUS             BIT10  ///< 0x0400
#define EFI_PCI_BRIDGE_CONTROL_DISCARD_TIMER_SERR       BIT11  ///< 0x0800

//
// Following are the PCI-CARDBUS bridge control bit, defined in PC Card Standard
//
#define EFI_PCI_BRIDGE_CONTROL_IREQINT_ENABLE        BIT7      ///< 0x0080
#define EFI_PCI_BRIDGE_CONTROL_RANGE0_MEMORY_TYPE    BIT8      ///< 0x0100
#define EFI_PCI_BRIDGE_CONTROL_RANGE1_MEMORY_TYPE    BIT9      ///< 0x0200
#define EFI_PCI_BRIDGE_CONTROL_WRITE_POSTING_ENABLE  BIT10     ///< 0x0400

//
// Following are the PCI status control bit
//
#define EFI_PCI_STATUS_CAPABILITY          BIT4                ///< 0x0010
#define EFI_PCI_STATUS_66MZ_CAPABLE        BIT5                ///< 0x0020
#define EFI_PCI_FAST_BACK_TO_BACK_CAPABLE  BIT7                ///< 0x0080
#define EFI_PCI_MASTER_DATA_PARITY_ERROR   BIT8                ///< 0x0100

///
/// defined in PC Card Standard
///
#define EFI_PCI_CARDBUS_BRIDGE_CAPABILITY_PTR  0x14

#pragma pack(1)
//
// PCI Capability List IDs and records
//
#define EFI_PCI_CAPABILITY_ID_PMI      0x01
#define EFI_PCI_CAPABILITY_ID_AGP      0x02
#define EFI_PCI_CAPABILITY_ID_VPD      0x03
#define EFI_PCI_CAPABILITY_ID_SLOTID   0x04
#define EFI_PCI_CAPABILITY_ID_MSI      0x05
#define EFI_PCI_CAPABILITY_ID_HOTPLUG  0x06
#define EFI_PCI_CAPABILITY_ID_SHPC     0x0C

///
/// Capabilities List Header
/// Section 6.7, PCI Local Bus Specification, 2.2
///
typedef struct {
  UINT8    CapabilityID;
  UINT8    NextItemPtr;
} EFI_PCI_CAPABILITY_HDR;

///
/// PMC - Power Management Capabilities
/// Section 3.2.3, PCI Power Management Interface Specification, Revision 1.2
///
typedef union {
  struct {
    UINT16    Version                      : 3;
    UINT16    PmeClock                     : 1;
    UINT16    Reserved                     : 1;
    UINT16    DeviceSpecificInitialization : 1;
    UINT16    AuxCurrent                   : 3;
    UINT16    D1Support                    : 1;
    UINT16    D2Support                    : 1;
    UINT16    PmeSupport                   : 5;
  } Bits;
  UINT16    Data;
} EFI_PCI_PMC;

#define EFI_PCI_PMC_D3_COLD_MASK  (BIT15)

///
/// PMCSR - Power Management Control/Status
/// Section 3.2.4, PCI Power Management Interface Specification, Revision 1.2
///
typedef union {
  struct {
    UINT16    PowerState            : 2;
    UINT16    ReservedForPciExpress : 1;
    UINT16    NoSoftReset           : 1;
    UINT16    Reserved              : 4;
    UINT16    PmeEnable             : 1;
    UINT16    DataSelect            : 4;
    UINT16    DataScale             : 2;
    UINT16    PmeStatus             : 1;
  } Bits;
  UINT16    Data;
} EFI_PCI_PMCSR;

#define PCI_POWER_STATE_D0      0
#define PCI_POWER_STATE_D1      1
#define PCI_POWER_STATE_D2      2
#define PCI_POWER_STATE_D3_HOT  3

///
/// PMCSR_BSE - PMCSR PCI-to-PCI Bridge Support Extensions
/// Section 3.2.5, PCI Power Management Interface Specification, Revision 1.2
///
typedef union {
  struct {
    UINT8    Reserved             : 6;
    UINT8    B2B3                 : 1;
    UINT8    BusPowerClockControl : 1;
  } Bits;
  UINT8    Uint8;
} EFI_PCI_PMCSR_BSE;

///
/// Power Management Register Block Definition
/// Section 3.2, PCI Power Management Interface Specification, Revision 1.2
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  EFI_PCI_PMC               PMC;
  EFI_PCI_PMCSR             PMCSR;
  EFI_PCI_PMCSR_BSE         BridgeExtention;
  UINT8                     Data;
} EFI_PCI_CAPABILITY_PMI;

///
/// A.G.P Capability
/// Section 6.1.4, Accelerated Graphics Port Interface Specification, Revision 1.0
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  UINT8                     Rev;
  UINT8                     Reserved;
  UINT32                    Status;
  UINT32                    Command;
} EFI_PCI_CAPABILITY_AGP;

///
/// VPD Capability Structure
/// Appendix I, PCI Local Bus Specification, 2.2
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  UINT16                    AddrReg;
  UINT32                    DataReg;
} EFI_PCI_CAPABILITY_VPD;

///
/// Slot Numbering Capabilities Register
/// Section 3.2.6, PCI-to-PCI Bridge Architecture Specification, Revision 1.2
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  UINT8                     ExpnsSlotReg;
  UINT8                     ChassisNo;
} EFI_PCI_CAPABILITY_SLOTID;

///
/// Message Capability Structure for 32-bit Message Address
/// Section 6.8.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  UINT16                    MsgCtrlReg;
  UINT32                    MsgAddrReg;
  UINT16                    MsgDataReg;
} EFI_PCI_CAPABILITY_MSI32;

///
/// Message Capability Structure for 64-bit Message Address
/// Section 6.8.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  UINT16                    MsgCtrlReg;
  UINT32                    MsgAddrRegLsdw;
  UINT32                    MsgAddrRegMsdw;
  UINT16                    MsgDataReg;
} EFI_PCI_CAPABILITY_MSI64;

///
/// Capability EFI_PCI_CAPABILITY_ID_HOTPLUG,
/// CompactPCI Hot Swap Specification PICMG 2.1, R1.0
///
typedef struct {
  EFI_PCI_CAPABILITY_HDR    Hdr;
  ///
  /// not finished - fields need to go here
  ///
} EFI_PCI_CAPABILITY_HOTPLUG;

#define PCI_BAR_IDX0  0x00
#define PCI_BAR_IDX1  0x01
#define PCI_BAR_IDX2  0x02
#define PCI_BAR_IDX3  0x03
#define PCI_BAR_IDX4  0x04
#define PCI_BAR_IDX5  0x05

///
/// EFI PCI Option ROM definitions
///
#define EFI_ROOT_BRIDGE_LIST                       'eprb'
#define EFI_PCI_EXPANSION_ROM_HEADER_EFISIGNATURE  0x0EF1       ///< defined in UEFI Spec.

#define PCI_EXPANSION_ROM_HEADER_SIGNATURE       0xaa55
#define PCI_DATA_STRUCTURE_SIGNATURE             SIGNATURE_32 ('P', 'C', 'I', 'R')
#define PCI_CODE_TYPE_PCAT_IMAGE                 0x00
#define EFI_PCI_EXPANSION_ROM_HEADER_COMPRESSED  0x0001         ///< defined in UEFI spec.

///
/// Standard PCI Expansion ROM Header
/// Section 13.4.2, Unified Extensible Firmware Interface Specification, Version 2.1
///
typedef struct {
  UINT16    Signature;  ///< 0xaa55
  UINT8     Reserved[0x16];
  UINT16    PcirOffset;
} PCI_EXPANSION_ROM_HEADER;

///
/// Legacy ROM Header Extensions
/// Section 6.3.3.1, PCI Local Bus Specification, 2.2
///
typedef struct {
  UINT16    Signature;  ///< 0xaa55
  UINT8     Size512;
  UINT8     InitEntryPoint[3];
  UINT8     Reserved[0x12];
  UINT16    PcirOffset;
} EFI_LEGACY_EXPANSION_ROM_HEADER;

///
/// PCI Data Structure Format
/// Section 6.3.1.2, PCI Local Bus Specification, 2.2
///
typedef struct {
  UINT32    Signature;  ///< "PCIR"
  UINT16    VendorId;
  UINT16    DeviceId;
  UINT16    Reserved0;
  UINT16    Length;
  UINT8     Revision;
  UINT8     ClassCode[3];
  UINT16    ImageLength;
  UINT16    CodeRevision;
  UINT8     CodeType;
  UINT8     Indicator;
  UINT16    Reserved1;
} PCI_DATA_STRUCTURE;

///
/// EFI PCI Expansion ROM Header
/// Section 13.4.2, Unified Extensible Firmware Interface Specification, Version 2.1
///
typedef struct {
  UINT16    Signature;  ///< 0xaa55
  UINT16    InitializationSize;
  UINT32    EfiSignature; ///< 0x0EF1
  UINT16    EfiSubsystem;
  UINT16    EfiMachineType;
  UINT16    CompressionType;
  UINT8     Reserved[8];
  UINT16    EfiImageHeaderOffset;
  UINT16    PcirOffset;
} EFI_PCI_EXPANSION_ROM_HEADER;

typedef union {
  UINT8                              *Raw;
  PCI_EXPANSION_ROM_HEADER           *Generic;
  EFI_PCI_EXPANSION_ROM_HEADER       *Efi;
  EFI_LEGACY_EXPANSION_ROM_HEADER    *PcAt;
} EFI_PCI_ROM_HEADER;

#pragma pack()

#endif