/** @file

  This file contains support for ACPI Tables that are generated at boot time.

  Copyright (c) 2015, ARM Ltd. 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.

**/

#include "ArmPlatform.h"
#include "ArmJunoDxeInternal.h"

#include <IndustryStandard/MemoryMappedConfigurationSpaceAccessTable.h>

/*
 * Memory Mapped Configuration Space Access Table (MCFG)
 */
typedef struct {
  EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER                        Header;
  EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE Entry;
} MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ACCESS_TABLE;

MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ACCESS_TABLE mAcpiMcfgTable = {
    {
        ARM_ACPI_HEADER (
          EFI_ACPI_5_0_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE,
          MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ACCESS_TABLE,
          EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_SPACE_ACCESS_TABLE_REVISION
        ),
        0, // Reserved
    }, {
        FixedPcdGet32 (PcdPciConfigurationSpaceBaseAddress),
        0, // PciSegmentGroupNumber
        FixedPcdGet32 (PcdPciBusMin),
        FixedPcdGet32 (PcdPciBusMax),
        0 // Reserved;
    }
};

/**
 * Callback called when ACPI Protocol is installed
 */
VOID
AcpiPciNotificationEvent (
  IN  EFI_EVENT                Event,
  IN  VOID                     *Context
  )
{
  EFI_STATUS                Status;
  EFI_ACPI_TABLE_PROTOCOL   *AcpiTableProtocol;
  UINTN                     AcpiTableKey;

  //
  // Ensure the ACPI protocol is installed
  //
  Status = gBS->LocateProtocol (
                  &gEfiAcpiTableProtocolGuid,
                  NULL,
                  (VOID**)&AcpiTableProtocol
                  );
  if (EFI_ERROR (Status)) {
    return;
  }

  //
  // Install MCFG Table
  //
  AcpiTableKey = 0;
  Status = AcpiTableProtocol->InstallAcpiTable (AcpiTableProtocol, &mAcpiMcfgTable, sizeof (mAcpiMcfgTable), &AcpiTableKey);
  ASSERT_EFI_ERROR (Status);
}