/** @file
ACPI Platform Driver

Copyright (c) 2013-2016 Intel Corporation.

SPDX-License-Identifier: BSD-2-Clause-Patent

**/

#include <Protocol/AcpiTable.h>
#include <IndustryStandard/Pci22.h>
#include "AcpiPlatform.h"

//
// Global Variable
//
EFI_GLOBAL_NVS_AREA_PROTOCOL  mGlobalNvsArea;
EFI_ACPI_SDT_PROTOCOL         *mAcpiSdt;

EFI_ACPI_HANDLE mDsdtHandle = NULL;


EFI_STATUS
LocateSupportProtocol (
  IN  EFI_GUID                       *Protocol,
  OUT VOID                           **Instance,
  IN  UINT32                         Type
  )
/*++

Routine Description:

  Locate the first instance of a protocol.  If the protocol requested is an
  FV protocol, then it will return the first FV that contains the ACPI table
  storage file.

Arguments:

  Protocol      The protocol to find.
  Instance      Return pointer to the first instance of the protocol

Returns:

  EFI_SUCCESS           The function completed successfully.
  EFI_NOT_FOUND         The protocol could not be located.
  EFI_OUT_OF_RESOURCES  There are not enough resources to find the protocol.

--*/
{
  EFI_STATUS              Status;
  EFI_HANDLE              *HandleBuffer;
  UINTN                   NumberOfHandles;
  EFI_FV_FILETYPE         FileType;
  UINT32                  FvStatus;
  EFI_FV_FILE_ATTRIBUTES  Attributes;
  UINTN                   Size;
  UINTN                   i;

  FvStatus = 0;

  //
  // Locate protocol.
  //
  Status = gBS->LocateHandleBuffer (
                   ByProtocol,
                   Protocol,
                   NULL,
                   &NumberOfHandles,
                   &HandleBuffer
                   );
  if (EFI_ERROR (Status)) {

    //
    // Defined errors at this time are not found and out of resources.
    //
    return Status;
  }



  //
  // Looking for FV with ACPI storage file
  //

  for (i = 0; i < NumberOfHandles; i++) {
    //
    // Get the protocol on this handle
    // This should not fail because of LocateHandleBuffer
    //
    Status = gBS->HandleProtocol (
                     HandleBuffer[i],
                     Protocol,
                     Instance
                     );
    ASSERT_EFI_ERROR (Status);

    if (!Type) {
      //
      // Not looking for the FV protocol, so find the first instance of the
      // protocol.  There should not be any errors because our handle buffer
      // should always contain at least one or LocateHandleBuffer would have
      // returned not found.
      //
      break;
    }

    //
    // See if it has the ACPI storage file
    //

    Status = ((EFI_FIRMWARE_VOLUME2_PROTOCOL*) (*Instance))->ReadFile (*Instance,
                                                              (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
                                                              NULL,
                                                              &Size,
                                                              &FileType,
                                                              &Attributes,
                                                              &FvStatus
                                                              );

    //
    // If we found it, then we are done
    //
    if (Status == EFI_SUCCESS) {
      break;
    }
  }

  //
  // Our exit status is determined by the success of the previous operations
  // If the protocol was found, Instance already points to it.
  //

  //
  // Free any allocated buffers
  //
  gBS->FreePool (HandleBuffer);

  return Status;
}


VOID
DsdtTableUpdate (
  IN OUT   EFI_ACPI_DESCRIPTION_HEADER  *TableHeader,
  IN OUT   EFI_ACPI_TABLE_VERSION       *Version
  )
/*++

  Routine Description:

    Update the DSDT table

  Arguments:

    Table   - The table to be set
    Version - Version to publish

  Returns:

    None

--*/
{

  UINT8      *CurrPtr;
  UINT8      *DsdtPointer;
  UINT32     *Signature;
  UINT8      *Operation;
  UINT32     *Address;
  UINT16     *Size;
  //
  // Loop through the ASL looking for values that we must fix up.
  //
  CurrPtr = (UINT8 *) TableHeader;
  for (DsdtPointer = CurrPtr;
       DsdtPointer <= (CurrPtr + ((EFI_ACPI_COMMON_HEADER *) CurrPtr)->Length);
       DsdtPointer++
      )
  {
    Signature = (UINT32 *) DsdtPointer;
    switch (*Signature) {
    //
    // MNVS operation region
    //
    case (SIGNATURE_32 ('M', 'N', 'V', 'S')):
      //
      // Conditional match.  For Region Objects, the Operator will always be the
      // byte immediately before the specific name.  Therefore, subtract 1 to check
      // the Operator.
      //
      Operation = DsdtPointer - 1;
      if (*Operation == AML_OPREGION_OP) {
        Address   = (UINT32 *) (DsdtPointer + 6);
        *Address  = (UINT32) (UINTN) mGlobalNvsArea.Area;
        Size      = (UINT16 *) (DsdtPointer + 11);
        *Size     = sizeof (EFI_GLOBAL_NVS_AREA);
      }
      break;

    //
    // Update processor PBLK register I/O base address
    //
    case (SIGNATURE_32 ('P', 'R', 'I', 'O')):
      //
      // Conditional match. Update the following ASL code:
      // Processor (CPU0, 0x01, 0x4F495250, 0x06) {}
      // The 3rd parameter will be updated to the actual PBLK I/O base address.
      // the Operator.
      //
      Operation = DsdtPointer - 8;
      if ((*Operation == AML_EXT_OP) && (*(Operation + 1) == AML_EXT_PROCESSOR_OP)) {
        *(UINT32 *)DsdtPointer = PcdGet16(PcdPmbaIoBaseAddress);
      }
      break;
    default:
      break;
    }
  }
}


VOID
ApicTableUpdate (
  IN OUT   EFI_ACPI_DESCRIPTION_HEADER  *TableHeader,
  IN OUT   EFI_ACPI_TABLE_VERSION       *Version
  )
/*++

  Routine Description:

    Update the processors information in the APIC table

  Arguments:

    Table   - The table to be set
    Version - Version to publish

  Returns:

    None

--*/
{
  EFI_STATUS                 Status;
  EFI_MP_SERVICES_PROTOCOL   *MpService;
  UINT8                      *CurrPtr;
  UINT8                      *EndPtr;
  UINT8                      CurrIoApic;
  UINT8                      CurrProcessor;
  UINTN                      NumberOfCPUs;
  UINTN                      NumberOfEnabledCPUs;
  EFI_PROCESSOR_INFORMATION  MpContext;
  ACPI_APIC_STRUCTURE_PTR    *ApicPtr;

  CurrIoApic    = 0;
  CurrProcessor = 0;
  //
  // Find the MP Protocol. This is an MP platform, so MP protocol must be
  // there.
  //
  Status = gBS->LocateProtocol (
                   &gEfiMpServiceProtocolGuid,
                   NULL,
                  (VOID**)&MpService
                   );
  if (EFI_ERROR (Status)) {
    //
    // Failed to get MP information, doesn't publish the invalid table
    //
    *Version = EFI_ACPI_TABLE_VERSION_NONE;
    return;
  }

  //
  // Determine the number of processors
  //
  MpService->GetNumberOfProcessors (
              MpService,
              &NumberOfCPUs,
              &NumberOfEnabledCPUs
              );

  CurrPtr = (UINT8*) &(TableHeader[1]);
  CurrPtr = CurrPtr + 8; // Size of Local APIC Address & Flag
  EndPtr  = (UINT8*) TableHeader;
  EndPtr  = EndPtr + TableHeader->Length;

  while (CurrPtr < EndPtr) {

    ApicPtr = (ACPI_APIC_STRUCTURE_PTR*) CurrPtr;
    switch (ApicPtr->AcpiApicCommon.Type) {

      case EFI_ACPI_1_0_PROCESSOR_LOCAL_APIC:
        ApicPtr->AcpiLocalApic.Flags = 0;
        ApicPtr->AcpiLocalApic.ApicId = 0;
        Status = MpService->GetProcessorInfo (
                              MpService,
                              CurrProcessor,
                              &MpContext
                              );

        if (!EFI_ERROR (Status)) {
          if (MpContext.StatusFlag & PROCESSOR_ENABLED_BIT) {
            ApicPtr->AcpiLocalApic.Flags = EFI_ACPI_3_0_LOCAL_APIC_ENABLED;
          }
          ApicPtr->AcpiLocalApic.ApicId = (UINT8)MpContext.ProcessorId;
        }
        CurrProcessor++;
        break;

      case EFI_ACPI_1_0_IO_APIC:
        //
        // IO APIC entries can be patched here
        //
        if (CurrIoApic == 0) {
          //
          // Update SOC internel IOAPIC base
          //
          ApicPtr->AcpiIoApic.IoApicId      =  PcdGet8 (PcdIoApicSettingIoApicId);
          ApicPtr->AcpiIoApic.IoApicAddress =  (UINT32)PcdGet64(PcdIoApicBaseAddress);
          ApicPtr->AcpiIoApic.GlobalSystemInterruptBase = 0;
        } else {
          //
          // Porting is required to update other IOAPIC entries if available
          //
          ASSERT (0);
        }
        CurrIoApic++;
        break;

      default:
        break;
      };
    CurrPtr = CurrPtr + ApicPtr->AcpiApicCommon.Length;
  }
}

VOID
AcpiUpdateTable (
  IN OUT   EFI_ACPI_DESCRIPTION_HEADER  *TableHeader,
  IN OUT   EFI_ACPI_TABLE_VERSION       *Version
  )
/*++

  Routine Description:

    Set the correct table revision upon the setup value

  Arguments:

    Table   - The table to be set
    Version - Version to publish

  Returns:

    None

--*/

{
  EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *FadtHeader1;
  EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *FadtHeader2;
  EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE *FadtHeader3;
  EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE *AllocationStructurePtr;

  if (TableHeader != NULL && Version != NULL) {

    *Version = EFI_ACPI_TABLE_VERSION_1_0B | EFI_ACPI_TABLE_VERSION_2_0 | EFI_ACPI_TABLE_VERSION_3_0;
    //
    // Here we use all 3.0 signature because all version use same signature if they supported
    //
    switch (TableHeader->Signature) {
    //
    // "APIC" Multiple APIC Description Table
    //
    case EFI_ACPI_3_0_MULTIPLE_APIC_DESCRIPTION_TABLE_SIGNATURE:
      ApicTableUpdate (TableHeader, Version);
      break;
    //
    // "DSDT" Differentiated System Description Table
    //
    case EFI_ACPI_3_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
      DsdtTableUpdate (TableHeader, Version);
      break;

    //
    // "FACP" Fixed ACPI Description Table (FADT)
    //
    case EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE_SIGNATURE:
      *Version = EFI_ACPI_TABLE_VERSION_NONE;
      if (TableHeader->Revision == EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE_REVISION) {
        *Version = EFI_ACPI_TABLE_VERSION_1_0B;
        FadtHeader1 = (EFI_ACPI_1_0_FIXED_ACPI_DESCRIPTION_TABLE *) TableHeader;
        FadtHeader1->SmiCmd     = PcdGet16(PcdSmmActivationPort);
        FadtHeader1->Pm1aEvtBlk = PcdGet16(PcdPm1blkIoBaseAddress);
        FadtHeader1->Pm1aCntBlk = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1C;
        FadtHeader1->PmTmrBlk   = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1T;
        FadtHeader1->Gpe0Blk    = PcdGet16(PcdGpe0blkIoBaseAddress);
      } else if (TableHeader->Revision == EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE_REVISION) {
        *Version = EFI_ACPI_TABLE_VERSION_2_0;
        FadtHeader2 = (EFI_ACPI_2_0_FIXED_ACPI_DESCRIPTION_TABLE *) TableHeader;
        FadtHeader2->SmiCmd     = PcdGet16(PcdSmmActivationPort);
        FadtHeader2->Pm1aEvtBlk = PcdGet16(PcdPm1blkIoBaseAddress);
        FadtHeader2->Pm1aCntBlk = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1C;
        FadtHeader2->PmTmrBlk   = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1T;
        FadtHeader2->Gpe0Blk    = PcdGet16(PcdGpe0blkIoBaseAddress);
        FadtHeader2->XPm1aEvtBlk.Address = FadtHeader2->Pm1aEvtBlk;
        FadtHeader2->XPm1aCntBlk.Address = FadtHeader2->Pm1aCntBlk;
        FadtHeader2->XPmTmrBlk.Address   = FadtHeader2->PmTmrBlk;
        FadtHeader2->XGpe0Blk.Address    = FadtHeader2->Gpe0Blk;
      } else if (TableHeader->Revision == EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE_REVISION) {
        *Version = EFI_ACPI_TABLE_VERSION_3_0;
        FadtHeader3 = (EFI_ACPI_3_0_FIXED_ACPI_DESCRIPTION_TABLE *) TableHeader;
        FadtHeader3->SmiCmd     = PcdGet16(PcdSmmActivationPort);
        FadtHeader3->Pm1aEvtBlk = PcdGet16(PcdPm1blkIoBaseAddress);
        FadtHeader3->Pm1aCntBlk = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1C;
        FadtHeader3->PmTmrBlk   = PcdGet16(PcdPm1blkIoBaseAddress) + R_QNC_PM1BLK_PM1T;
        FadtHeader3->Gpe0Blk    = PcdGet16(PcdGpe0blkIoBaseAddress);
        FadtHeader3->XPm1aEvtBlk.Address = FadtHeader3->Pm1aEvtBlk;
        FadtHeader3->XPm1aCntBlk.Address = FadtHeader3->Pm1aCntBlk;
        FadtHeader3->XPmTmrBlk.Address   = FadtHeader3->PmTmrBlk;
        FadtHeader3->XGpe0Blk.Address    = FadtHeader3->Gpe0Blk;
      }
      break;
    //
    // "FACS" Firmware ACPI Control Structure
    //
    case EFI_ACPI_3_0_FIRMWARE_ACPI_CONTROL_STRUCTURE_SIGNATURE:
      break;
    //
    // "SSDT" Secondary System Description Table
    //
    case EFI_ACPI_3_0_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
    break;
    //
    // "HPET" IA-PC High Precision Event Timer Table
    //
    case EFI_ACPI_3_0_HIGH_PRECISION_EVENT_TIMER_TABLE_SIGNATURE:
      //
      // If HPET is disabled in setup, don't publish the table.
      //
      if (mGlobalNvsArea.Area->HpetEnable == 0) {
        *Version = EFI_ACPI_TABLE_VERSION_NONE;
      }
      ((EFI_ACPI_HIGH_PRECISION_EVENT_TIMER_TABLE_HEADER *) TableHeader)->BaseAddressLower32Bit.Address
        = PcdGet64 (PcdHpetBaseAddress);
      break;
    //
    // "SPCR" Serial Port Concole Redirection Table
    //
    case EFI_ACPI_3_0_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE:
      break;
    //
    // "MCFG" PCI Express Memory Mapped Configuration Space Base Address Description Table
    //
    case EFI_ACPI_3_0_PCI_EXPRESS_MEMORY_MAPPED_CONFIGURATION_SPACE_BASE_ADDRESS_DESCRIPTION_TABLE_SIGNATURE:
      AllocationStructurePtr = (EFI_ACPI_MEMORY_MAPPED_ENHANCED_CONFIGURATION_SPACE_BASE_ADDRESS_ALLOCATION_STRUCTURE *)
        ((UINT8 *)TableHeader + sizeof(EFI_ACPI_MEMORY_MAPPED_CONFIGURATION_BASE_ADDRESS_TABLE_HEADER));
      AllocationStructurePtr->BaseAddress = PcdGet64(PcdPciExpressBaseAddress);
      break;
    // Lakeport platform doesn't support the following table
    /*
      //
    // "ECDT" Embedded Controller Boot Resources Table
        //
    case EFI_ACPI_3_0_EMBEDDED_CONTROLLER_BOOT_RESOURCES_TABLE_SIGNATURE:
      break;
        //
    // "PSDT" Persistent System Description Table
          //
    case EFI_ACPI_3_0_PERSISTENT_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
      break;
          //
    // "SBST" Smart Battery Specification Table
    //
    case EFI_ACPI_3_0_SMART_BATTERY_SPECIFICATION_TABLE_SIGNATURE:
          break;
    //
    // "SLIT" System Locality Information Table
    //
    case EFI_ACPI_3_0_SYSTEM_LOCALITY_INFORMATION_TABLE_SIGNATURE:
          break;
    //
    // "SRAT" Static Resource Affinity Table
    //
    case EFI_ACPI_3_0_STATIC_RESOURCE_AFFINITY_TABLE_SIGNATURE:
    break;
  //
    // "XSDT" Extended System Description Table
  //
    case EFI_ACPI_3_0_EXTENDED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE:
      break;
  //
    // "BOOT" MS Simple Boot Spec
  //
    case EFI_ACPI_3_0_SIMPLE_BOOT_FLAG_TABLE_SIGNATURE:
      break;
  //
    // "CPEP" Corrected Platform Error Polling Table
  //
    case EFI_ACPI_3_0_CORRECTED_PLATFORM_ERROR_POLLING_TABLE_SIGNATURE:
      break;
  //
    // "DBGP" MS Debug Port Spec
  //
    case EFI_ACPI_3_0_DEBUG_PORT_TABLE_SIGNATURE:
      break;
    //
    // "ETDT" Event Timer Description Table
    //
    case EFI_ACPI_3_0_EVENT_TIMER_DESCRIPTION_TABLE_SIGNATURE:
      break;
    //
    // "SPMI" Server Platform Management Interface Table
    //
    case EFI_ACPI_3_0_SERVER_PLATFORM_MANAGEMENT_INTERFACE_TABLE_SIGNATURE:
      break;
    //
    // "TCPA" Trusted Computing Platform Alliance Capabilities Table
    //
    case EFI_ACPI_3_0_TRUSTED_COMPUTING_PLATFORM_ALLIANCE_CAPABILITIES_TABLE_SIGNATURE:
      break;
    */
    default:
      break;
    }
  }
}

//
// Description:
//    Entrypoint of Acpi Platform driver
// In:
//    ImageHandle
//    SystemTable
// Out:
//    EFI_SUCCESS
//    EFI_LOAD_ERROR
//    EFI_OUT_OF_RESOURCES
//

EFI_STATUS
AcpiPlatformEntryPoint (
  IN EFI_HANDLE     ImageHandle,
  IN EFI_SYSTEM_TABLE   *SystemTable
  )
{
  EFI_STATUS                    Status;
  EFI_ACPI_TABLE_PROTOCOL       *AcpiTable;
  EFI_FIRMWARE_VOLUME2_PROTOCOL *FwVol;
  INTN                          Instance;
  EFI_ACPI_COMMON_HEADER        *CurrentTable;
  UINTN                         TableHandle;
  UINT32                        FvStatus;
  UINTN                         Size;
  EFI_ACPI_TABLE_VERSION        Version;
  EFI_HANDLE                    Handle;
  UINTN                         Index;
  PCI_DEVICE_INFO               *PciDeviceInfo;
  EFI_ACPI_HANDLE               PciRootHandle;
  BOOLEAN                       UpdatePRT;
  BOOLEAN                       UpdatePRW;
  PCI_DEVICE_SETTING            *mConfigData;

  DEBUG((DEBUG_INFO, "ACPI Platform start...\n"));

  Instance = 0;
  TableHandle = 0;
  CurrentTable = NULL;
  mConfigData  = NULL;

  //
  // Initialize the EFI Driver Library
  //

  ASSERT (sizeof (EFI_GLOBAL_NVS_AREA) == 512);

  Status = gBS->AllocatePool (
                   EfiACPIMemoryNVS,
                   sizeof (EFI_GLOBAL_NVS_AREA),
                   (VOID**)&mGlobalNvsArea.Area
                   );

  Handle = NULL;
  Status = gBS->InstallProtocolInterface (
                  &Handle,
                  &gEfiGlobalNvsAreaProtocolGuid,
                  EFI_NATIVE_INTERFACE,
                  &mGlobalNvsArea
                  );

  ASSERT_EFI_ERROR (Status);
  if (!EFI_ERROR (Status)) {
    SetMem (
      mGlobalNvsArea.Area,
      sizeof (EFI_GLOBAL_NVS_AREA),
      0
      );
  }

  //
  // Initialize the data.  Eventually, this will be controlled by setup options.
  //
  mGlobalNvsArea.Area->HpetEnable           =  PcdGetBool (PcdHpetEnable);
  mGlobalNvsArea.Area->Pm1blkIoBaseAddress  =  PcdGet16(PcdPm1blkIoBaseAddress);
  mGlobalNvsArea.Area->PmbaIoBaseAddress    =  PcdGet16(PcdPmbaIoBaseAddress);
  mGlobalNvsArea.Area->Gpe0blkIoBaseAddress =  PcdGet16(PcdGpe0blkIoBaseAddress);
  mGlobalNvsArea.Area->GbaIoBaseAddress     =  PcdGet16(PcdGbaIoBaseAddress);
  mGlobalNvsArea.Area->SmbaIoBaseAddress    =  PcdGet16(PcdSmbaIoBaseAddress);
  mGlobalNvsArea.Area->WdtbaIoBaseAddress   =  PcdGet16(PcdWdtbaIoBaseAddress);
  mGlobalNvsArea.Area->HpetBaseAddress      =  (UINT32)PcdGet64(PcdHpetBaseAddress);
  mGlobalNvsArea.Area->HpetSize             =  (UINT32)PcdGet64(PcdHpetSize);
  mGlobalNvsArea.Area->PciExpressBaseAddress=  (UINT32)PcdGet64(PcdPciExpressBaseAddress);
  mGlobalNvsArea.Area->PciExpressSize       =  (UINT32)PcdGet64(PcdPciExpressSize);
  mGlobalNvsArea.Area->RcbaMmioBaseAddress  =  (UINT32)PcdGet64(PcdRcbaMmioBaseAddress);
  mGlobalNvsArea.Area->RcbaMmioSize         =  (UINT32)PcdGet64(PcdRcbaMmioSize);
  mGlobalNvsArea.Area->IoApicBaseAddress    =  (UINT32)PcdGet64(PcdIoApicBaseAddress);
  mGlobalNvsArea.Area->IoApicSize           =  (UINT32)PcdGet64(PcdIoApicSize);
  mGlobalNvsArea.Area->TpmPresent           =  (UINT32)(FALSE);
  mGlobalNvsArea.Area->DBG2Present          =  (UINT32)(FALSE);
  mGlobalNvsArea.Area->PlatformType         =  (UINT32)PcdGet16 (PcdPlatformType);

  //
  // Configure platform IO expander I2C Slave Address.
  //
  if (mGlobalNvsArea.Area->PlatformType == Galileo) {
    if (PlatformLegacyGpioGetLevel (R_QNC_GPIO_RGLVL_RESUME_WELL, GALILEO_DETERMINE_IOEXP_SLA_RESUMEWELL_GPIO)) {
      mGlobalNvsArea.Area->AlternateSla = FALSE;
    } else {
      mGlobalNvsArea.Area->AlternateSla = TRUE;
    }
  }

  //
  // Find the AcpiTable protocol
  //
  Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID**)&AcpiTable);
  if (EFI_ERROR (Status)) {
    return EFI_ABORTED;
  }

  //
  // Initialize MADT table
  //
  Status = MadtTableInitialize (&CurrentTable, &Size);
  ASSERT_EFI_ERROR (Status);
  //
  // Perform any table specific updates.
  //
  AcpiUpdateTable ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable, &Version);

  //
  // Update the check sum
  // It needs to be zeroed before the checksum calculation
  //
  ((EFI_ACPI_SDT_HEADER *)CurrentTable)->Checksum = 0;
  ((EFI_ACPI_SDT_HEADER *)CurrentTable)->Checksum =
    CalculateCheckSum8 ((VOID *)CurrentTable, CurrentTable->Length);

  //
  // Add the table
  //
  TableHandle = 0;
  Status = AcpiTable->InstallAcpiTable (
                            AcpiTable,
                            CurrentTable,
                            CurrentTable->Length,
                          &TableHandle
                          );
  ASSERT_EFI_ERROR (Status);
  CurrentTable = NULL;

  //
  // Init Pci Device PRT PRW information structure from PCD
  //
  mConfigData = (PCI_DEVICE_SETTING *)AllocateZeroPool (sizeof (PCI_DEVICE_SETTING));
  ASSERT (mConfigData != NULL);
  InitPciDeviceInfoStructure (mConfigData);
  //
  // Get the Acpi SDT protocol for manipulation on acpi table
  //
  Status = gBS->LocateProtocol (&gEfiAcpiSdtProtocolGuid, NULL, (VOID **)&mAcpiSdt);
  ASSERT_EFI_ERROR (Status);
  //
  // Locate the firmware volume protocol
  //
  Status = LocateSupportProtocol (&gEfiFirmwareVolume2ProtocolGuid, (VOID**)&FwVol, 1);
  if (EFI_ERROR (Status)) {
    return EFI_ABORTED;
  }
  //
  // Read tables from the storage file.
  //

  while (Status == EFI_SUCCESS) {

    Status = FwVol->ReadSection (
                      FwVol,
                      (EFI_GUID*)PcdGetPtr (PcdAcpiTableStorageFile),
                      EFI_SECTION_RAW,
                      Instance,
                      (VOID**)&CurrentTable,
                      &Size,
                      &FvStatus
                      );

    if (!EFI_ERROR(Status)) {
      //
      // Perform any table specific updates.
      //
      AcpiUpdateTable ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable, &Version);

      //
      // Update the check sum
      // It needs to be zeroed before the checksum calculation
      //
      ((EFI_ACPI_SDT_HEADER *)CurrentTable)->Checksum = 0;
      ((EFI_ACPI_SDT_HEADER *)CurrentTable)->Checksum =
        CalculateCheckSum8 ((VOID *)CurrentTable, CurrentTable->Length);

      //
      // Add the table
      //
      TableHandle = 0;
      Status = AcpiTable->InstallAcpiTable (
                            AcpiTable,
                              CurrentTable,
                            ((EFI_ACPI_DESCRIPTION_HEADER *) CurrentTable)->Length,
                              &TableHandle
                              );
      if (EFI_ERROR(Status)) {
        return EFI_ABORTED;
      }
      //
      // If this table is the DSDT table, then update the _PRT and _PRW based on
      // the settings from pcds
      //
      if (CurrentTable->Signature == EFI_ACPI_2_0_DIFFERENTIATED_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) {
        //
        // Create the root handle for DSDT table
        //
        Status = mAcpiSdt->OpenSdt (TableHandle, &mDsdtHandle);
        ASSERT_EFI_ERROR (Status);

        PciRootHandle = NULL;
        PciRootHandle = SdtGetRootBridgeHandle (mAcpiSdt, mDsdtHandle);
        ASSERT (PciRootHandle != NULL);

        PciDeviceInfo = NULL;
        for (Index = 0; Index < mConfigData->PciDeviceInfoNumber; Index++) {
          PciDeviceInfo = &(mConfigData->PciDeviceInfo[Index]);

          //
          // Check whether this is a valid item
          //
          if ((PciDeviceInfo->BridgeAddress != 0xFFFFFFFF) && (PciDeviceInfo->DeviceAddress != 0xFFFFFFFF)) {

            //DEBUG ((EFI_D_ERROR, "Valid pci info structure: bridge address:0x%x, device address:0x%x\n", PciDeviceInfo->BridgeAddress, PciDeviceInfo->DeviceAddress));

            UpdatePRT = FALSE;
            UpdatePRW = FALSE;

            SdtCheckPciDeviceInfoChanged (PciDeviceInfo, &UpdatePRT, &UpdatePRW);
            //
            // Check whether there is any valid pci routing item
            //
            if (UpdatePRT) {
              //
              // Update the pci routing information
              //
              //DEBUG ((EFI_D_ERROR, "Update _PRT\n"));
              SdtUpdatePciRouting (mAcpiSdt, PciRootHandle, PciDeviceInfo);
            }
            //
            // Check whether there is any valid pci routing item
            //
            if (UpdatePRW) {
              //
              // Update the pci wakeup information
              //
              //DEBUG ((EFI_D_ERROR, "Update _PRW\n"));
              SdtUpdatePowerWake (mAcpiSdt, PciRootHandle, PciDeviceInfo);
            }
          }
        }
        Status = mAcpiSdt->Close (PciRootHandle);
        ASSERT_EFI_ERROR (Status);
        //
        // Mark the root handle as modified , let SDT protocol recaculate the checksum
        //
        ((EFI_AML_HANDLE *)mDsdtHandle)->Modified = TRUE;
        Status = mAcpiSdt->Close (mDsdtHandle);
        ASSERT_EFI_ERROR (Status);
      }
      //
      // Increment the instance
      //
      Instance++;
      CurrentTable = NULL;
    }
  }

  gBS->FreePool (mConfigData);
  return EFI_SUCCESS;
}