MdePkg/Include/IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h

   1 /** @file
   2   ACPI memory mapped configuration space access table definition, defined at
   3   in the PCI Firmware Specification, version 3.0.
   4   Specification is available at http://www.pcisig.com.
   5
   6   Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
   7   SPDX-License-Identifier: BSD-2-Clause-Patent
   8 **/
   9
  10 #ifndef _MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_H_
  11 #define _MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_H_
  12
  13 //
  14 // Ensure proper structure formats
  15 //
  16 #pragma pack(1)
  17
  18 ///
  19 /// Memory Mapped Configuration Space Access Table (MCFG)
  20 /// This table is a basic description table header followed by
  21 /// a number of base address allocation structures.
  22 ///
  23 typedef struct {
  24   UINT64  BaseAddress;
  25   UINT16  PciSegmentGroupNumber;
  26   UINT8   StartBusNumber;
  27   UINT8   EndBusNumber;
  28   UINT32  Reserved;
  29 } EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE;
  30
  31 ///
  32 /// MCFG Table header definition.  The rest of the table
  33 /// must be defined in a platform specific manner.
  34 ///
  35 typedef struct {
  36   EFI_ACPI_DESCRIPTION_HEADER                       Header;
  37   UINT64                                            Reserved;
  38 } EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER;
  39
  40 ///
  41 /// MCFG Revision (defined in spec)
  42 ///
  43 #define EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION  0x01
  44
  45 #pragma pack()
  46
  47 #endif