QuarkSocPkg/QuarkNorthCluster/QNCInit/Dxe/QNCRootPorts.c

   1 /** @file
   2 PciHostBridge driver module, part of QNC module.
   3
   4 Provides the basic interfaces to abstract a PCI Host Bridge Resource Allocation.
   5
   6 Copyright (c) 2013-2015 Intel Corporation.
   7
   8 SPDX-License-Identifier: BSD-2-Clause-Patent
   9
  10 **/
  11 #include "CommonHeader.h"
  12 #include "QNCInit.h"
  13
  14 UINT32  mS3ParameterRootPortDownstream = 0;
  15 EFI_QNC_S3_DISPATCH_ITEM  mS3DispatchItem = {
  16     QncS3ItemTypeInitPcieRootPortDownstream,
  17     &mS3ParameterRootPortDownstream
  18   };
  19
  20 EFI_STATUS
  21 QncInitRootPorts (
  22   )
  23 /*++
  24
  25 Routine Description:
  26
  27   Perform Initialization of the Downstream Root Ports
  28
  29 Arguments:
  30
  31 Returns:
  32
  33   EFI_SUCCESS             The function completed successfully
  34
  35 --*/
  36 {
  37   EFI_STATUS                   Status;
  38   EFI_QNC_S3_SUPPORT_PROTOCOL  *QncS3Support;
  39   VOID                         *Context;
  40   VOID                         *S3DispatchEntryPoint;
  41
  42   Status = PciExpressInit ();
  43   ASSERT_EFI_ERROR (Status);
  44
  45   //
  46   // Get the QNC S3 Support Protocol
  47   //
  48   Status = gBS->LocateProtocol (
  49                   &gEfiQncS3SupportProtocolGuid,
  50                   NULL,
  51                   (VOID **) &QncS3Support
  52                   );
  53   ASSERT_EFI_ERROR (Status);
  54   if (EFI_ERROR (Status)) {
  55     return Status;
  56   }
  57
  58   //
  59   // Get the QNC S3 Support Protocol
  60   //
  61   Status = QncS3Support->SetDispatchItem (
  62                           QncS3Support,
  63                           &mS3DispatchItem,
  64                           &S3DispatchEntryPoint,
  65                           &Context
  66                           );
  67   ASSERT_EFI_ERROR (Status);
  68
  69   //
  70   // Save the script dispatch item in the Boot Script
  71   //
  72   Status = S3BootScriptSaveDispatch2 (S3DispatchEntryPoint, Context);
  73   ASSERT_EFI_ERROR (Status);
  74
  75   return Status;
  76 }