OvmfPkg: introduce empty PlatformDxe

This DXE driver will load/save persistent values for OVMF's config knobs,
plus expose those knobs via HII.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15364 6f19259b-4bc3-4df7-8a09-765794883524

OvmfPkg/OvmfPkgIa32.dsc

@@ -557,3 +557,5 @@
   }
   OvmfPkg/SecureBootConfigDxe/SecureBootConfigDxe.inf
 !endif
+
+  OvmfPkg/PlatformDxe/Platform.inf

OvmfPkg/OvmfPkgIa32.fdf

@@ -376,6 +376,7 @@ INF  RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
 !endif
 
 INF  OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
+INF  OvmfPkg/PlatformDxe/Platform.inf
 
 ################################################################################
 

OvmfPkg/OvmfPkgIa32X64.dsc

@@ -564,3 +564,5 @@
   }
   OvmfPkg/SecureBootConfigDxe/SecureBootConfigDxe.inf
 !endif
+
+  OvmfPkg/PlatformDxe/Platform.inf

OvmfPkg/OvmfPkgIa32X64.fdf

@@ -376,6 +376,7 @@ INF  RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
 !endif
 
 INF  OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
+INF  OvmfPkg/PlatformDxe/Platform.inf
 
 ################################################################################
 

OvmfPkg/OvmfPkgX64.dsc

@@ -562,3 +562,5 @@
   }
   OvmfPkg/SecureBootConfigDxe/SecureBootConfigDxe.inf
 !endif
+
+  OvmfPkg/PlatformDxe/Platform.inf

OvmfPkg/OvmfPkgX64.fdf

@@ -376,6 +376,7 @@ INF  RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf
 !endif
 
 INF  OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
+INF  OvmfPkg/PlatformDxe/Platform.inf
 
 ################################################################################
 

OvmfPkg/PlatformDxe/Platform.c

@@ -0,0 +1,53 @@
+/** @file
+  This driver effectuates OVMF's platform configuration settings and exposes
+  them via HII.
+
+  Copyright (C) 2014, Red Hat, Inc.
+  Copyright (c) 2009 - 2011, Intel Corporation. All rights reserved.<BR>
+
+  This program and the accompanying materials are licensed and made available
+  under the terms and conditions of the BSD License which accompanies this
+  distribution.  The full text of the license may be found at
+  http://opensource.org/licenses/bsd-license.php
+
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT
+  WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+**/
+
+#include <Library/DebugLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+/**
+  Entry point for this driver.
+
+  @param[in] ImageHandle  Image handle of this driver.
+  @param[in] SystemTable  Pointer to SystemTable.
+
+  @retval EFI_SUCESS            Driver has loaded successfully.
+
+**/
+EFI_STATUS
+EFIAPI
+PlatformInit (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  return EFI_SUCCESS;
+}
+
+/**
+  Unload the driver.
+
+  @param[in]  ImageHandle  Handle that identifies the image to evict.
+
+  @retval EFI_SUCCESS  The image has been unloaded.
+**/
+EFI_STATUS
+EFIAPI
+PlatformUnload (
+  IN  EFI_HANDLE  ImageHandle
+  )
+{
+  return EFI_SUCCESS;
+}

OvmfPkg/PlatformDxe/Platform.inf

@@ -0,0 +1,41 @@
+## @file
+#  This driver effectuates OVMF's platform configuration settings and exposes
+#  them via HII.
+#
+#  Copyright (C) 2014, Red Hat, Inc.
+#  Copyright (c) 2009 - 2010, Intel Corporation. All rights reserved.<BR>
+#
+#  This program and the accompanying materials are licensed and made available
+#  under the terms and conditions of the BSD License which accompanies this
+#  distribution. The full text of the license may be found at
+#  http://opensource.org/licenses/bsd-license.php
+#
+#  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
+#  IMPLIED.
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PlatformDxe
+  FILE_GUID                      = D9DCC5DF-4007-435E-9098-8970935504B2
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = PlatformInit
+  UNLOAD_IMAGE                   = PlatformUnload
+
+[Sources]
+  Platform.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+  DebugLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[Depex]
+  TRUE