OvmfPkg/PlatformDxe/Platform.c

   1 /** @file
   2   This driver effectuates OVMF's platform configuration settings and exposes
   3   them via HII.
   4
   5   Copyright (C) 2014, Red Hat, Inc.
   6   Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
   7
   8   This program and the accompanying materials are licensed and made available
   9   under the terms and conditions of the BSD License which accompanies this
  10   distribution.  The full text of the license may be found at
  11   http://opensource.org/licenses/bsd-license.php
  12
  13   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
  14   WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  15 **/
  16
  17 #include <Library/DebugLib.h>
  18 #include <Library/UefiBootServicesTableLib.h>
  19
  20 #include "PlatformConfig.h"
  21
  22 /**
  23   Load and execute the platform configuration.
  24
  25   @retval EFI_SUCCESS            Configuration loaded and executed.
  26   @return                        Status codes from PlatformConfigLoad().
  27 **/
  28 STATIC
  29 EFI_STATUS
  30 EFIAPI
  31 ExecutePlatformConfig (
  32   VOID
  33   )
  34 {
  35   EFI_STATUS      Status;
  36   PLATFORM_CONFIG PlatformConfig;
  37   UINT64          OptionalElements;
  38
  39   Status = PlatformConfigLoad (&PlatformConfig, &OptionalElements);
  40   if (EFI_ERROR (Status)) {
  41     DEBUG (((Status == EFI_NOT_FOUND) ? EFI_D_VERBOSE : EFI_D_ERROR,
  42       "%a: failed to load platform config: %r\n", __FUNCTION__, Status));
  43     return Status;
  44   }
  45
  46   if (OptionalElements & PLATFORM_CONFIG_F_GRAPHICS_RESOLUTION) {
  47     //
  48     // Pass the preferred resolution to GraphicsConsoleDxe via dynamic PCDs.
  49     //
  50     PcdSet32 (PcdVideoHorizontalResolution,
  51       PlatformConfig.HorizontalResolution);
  52     PcdSet32 (PcdVideoVerticalResolution,
  53       PlatformConfig.VerticalResolution);
  54   }
  55
  56   return EFI_SUCCESS;
  57 }
  58
  59
  60 /**
  61   Entry point for this driver.
  62
  63   @param[in] ImageHandle  Image handle of this driver.
  64   @param[in] SystemTable  Pointer to SystemTable.
  65
  66   @retval EFI_SUCESS            Driver has loaded successfully.
  67
  68 **/
  69 EFI_STATUS
  70 EFIAPI
  71 PlatformInit (
  72   IN  EFI_HANDLE        ImageHandle,
  73   IN  EFI_SYSTEM_TABLE  *SystemTable
  74   )
  75 {
  76   ExecutePlatformConfig ();
  77   return EFI_SUCCESS;
  78 }
  79
  80 /**
  81   Unload the driver.
  82
  83   @param[in]  ImageHandle  Handle that identifies the image to evict.
  84
  85   @retval EFI_SUCCESS  The image has been unloaded.
  86 **/
  87 EFI_STATUS
  88 EFIAPI
  89 PlatformUnload (
  90   IN  EFI_HANDLE  ImageHandle
  91   )
  92 {
  93   return EFI_SUCCESS;
  94 }