/*
 * Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
 * Copyright (c) 2015, Nahanni Systems, Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-Patent
 */

#include "Platform.h"

#define EFI_ACPI_OEM_TABLE_ID                      SIGNATURE_64('B','V','M','C','F','G',' ',' ')

#pragma pack(1)

typedef struct {
  EFI_ACPI_DESCRIPTION_HEADER   Header;
  UINT64                        Reserved0;
  UINT64                        BaseAddress;
  UINT16                        PciSegmentGroupNumber;
  UINT8                         StartBusNumber;
  UINT8                         EndBusNumber;
  UINT32                        Reserved1;
} EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE;

#pragma pack()

EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE MCFG = {
  {
    EFI_ACPI_2_0_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_SIGNATURE,
    sizeof (EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE),
    EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION,
    0,                          // to make sum of entire table == 0
    {EFI_ACPI_OEM_ID},          // OEMID is a 6 bytes long field
    EFI_ACPI_OEM_TABLE_ID,      // OEM table identification(8 bytes long)
    EFI_ACPI_OEM_REVISION,      // OEM revision number
    EFI_ACPI_CREATOR_ID,        // ASL compiler vendor ID
    EFI_ACPI_CREATOR_REVISION   // ASL compiler revision number
  },
  0,                            // Reserved
  0x00000000E0000000,           // BaseAddress
  0x0000,                       // PciSegmentGroupNumber
  0,                            // StartBusNumber
  255,                          // EndBusNumber
  0                             // Reserved
};


VOID *
ReferenceAcpiTable (
  VOID
  )
{
  //
  // Reference the table being generated to prevent the optimizer from removing the
  // data structure from the exeutable
  //
  return (VOID*)&MCFG;
}