DuetPkg/PciRootBridgeNoEnumerationDxe/PcatPciRootBridgeDevicePath.c

   1 /*++
   2
   3 Copyright (c) 2005 - 2006, Intel Corporation
   4 All rights reserved. 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     ACPI_DEVICE_PATH,
  37     ACPI_DP,
  38     (UINT8) (sizeof(ACPI_HID_DEVICE_PATH)),
  39     (UINT8) ((sizeof(ACPI_HID_DEVICE_PATH)) >> 8),
  40     EISA_PNP_ID(0x0A03),
  41     0
  42   },
  43   {
  44     END_DEVICE_PATH_TYPE,
  45     END_ENTIRE_DEVICE_PATH_SUBTYPE,
  46     END_DEVICE_PATH_LENGTH,
  47     0
  48   }
  49 };
  50
  51 EFI_STATUS
  52 PcatRootBridgeDevicePathConstructor (
  53   IN EFI_DEVICE_PATH_PROTOCOL  **Protocol,
  54   IN UINTN                     RootBridgeNumber,
  55   IN BOOLEAN                   IsPciExpress
  56   )
  57 /*++
  58
  59 Routine Description:
  60
  61     Construct the device path protocol
  62
  63 Arguments:
  64
  65     Protocol - protocol to initialize
  66
  67 Returns:
  68
  69     None
  70
  71 --*/
  72 {
  73   ACPI_HID_DEVICE_PATH  *AcpiDevicePath;
  74
  75   *Protocol = DuplicateDevicePath((EFI_DEVICE_PATH_PROTOCOL *)(&mEfiPciRootBridgeDevicePath));
  76
  77   AcpiDevicePath = (ACPI_HID_DEVICE_PATH *)(*Protocol);
  78
  79   AcpiDevicePath->UID = (UINT32)RootBridgeNumber;
  80
  81   if (IsPciExpress) {
  82     AcpiDevicePath->HID = EISA_PNP_ID(0x0A08);
  83   }
  84
  85   return EFI_SUCCESS;
  86 }
  87