CorebootModulePkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridgeDevicePath.c

   1 /*++
   2
   3 Copyright (c) 2005 - 2006, Intel Corporation. All rights reserved.<BR>
   4 This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13     PcatPciRootBridgeDevicePath.c
  14
  15 Abstract:
  16
  17     EFI PCAT PCI Root Bridge Device Path Protocol
  18
  19 Revision History
  20
  21 --*/
  22
  23 #include "PcatPciRootBridge.h"
  24
  25 //
  26 // Static device path declarations for this driver.
  27 //
  28
  29 typedef struct {
  30   ACPI_HID_DEVICE_PATH              AcpiDevicePath;
  31   EFI_DEVICE_PATH_PROTOCOL          EndDevicePath;
  32 } EFI_PCI_ROOT_BRIDGE_DEVICE_PATH;
  33
  34 EFI_PCI_ROOT_BRIDGE_DEVICE_PATH mEfiPciRootBridgeDevicePath = {
  35   {
  36     {
  37       ACPI_DEVICE_PATH,
  38       ACPI_DP,
  39       {
  40         (UINT8) (sizeof(ACPI_HID_DEVICE_PATH)),
  41         (UINT8) ((sizeof(ACPI_HID_DEVICE_PATH)) >> 8),
  42       }
  43     },
  44     EISA_PNP_ID(0x0A03),
  45     0
  46   },
  47   {
  48     END_DEVICE_PATH_TYPE,
  49     END_ENTIRE_DEVICE_PATH_SUBTYPE,
  50     {
  51       END_DEVICE_PATH_LENGTH,
  52       0
  53     }
  54   }
  55 };
  56
  57 EFI_STATUS
  58 PcatRootBridgeDevicePathConstructor (
  59   IN EFI_DEVICE_PATH_PROTOCOL  **Protocol,
  60   IN UINTN                     RootBridgeNumber,
  61   IN BOOLEAN                   IsPciExpress
  62   )
  63 /*++
  64
  65 Routine Description:
  66
  67     Construct the device path protocol
  68
  69 Arguments:
  70
  71     Protocol - protocol to initialize
  72
  73 Returns:
  74
  75     None
  76
  77 --*/
  78 {
  79   ACPI_HID_DEVICE_PATH  *AcpiDevicePath;
  80
  81   *Protocol = DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL *)(&mEfiPciRootBridgeDevicePath));
  82
  83   AcpiDevicePath = (ACPI_HID_DEVICE_PATH *)(*Protocol);
  84
  85   AcpiDevicePath->UID = (UINT32)RootBridgeNumber;
  86
  87   if (IsPciExpress) {
  88     AcpiDevicePath->HID = EISA_PNP_ID(0x0A08);
  89   }
  90
  91   return EFI_SUCCESS;
  92 }
  93