MdePkg: UefiDevicePathLib: Support UefiDevicePathLib under StandaloneMm

This change added an instance of UefiDevicePathLib for StandaloneMm. It
abstracts DevicePathFromHandle function into different files for
Standalone MM and other instances to avoid linking gBS into MM_STANDALONE
drivers.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>

Signed-off-by: Kun Qin <kun.q@outlook.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

6 files changed, 168 insertions, 33 deletions

diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
index 9274ef8..7d5fb18 100644
--- a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilities.c
@@ -807,39 +807,6 @@ UefiDevicePathLibIsDevicePathMultiInstance (
 

 

 /**

-  Retrieves the device path protocol from a handle.

-

-  This function returns the device path protocol from the handle specified by Handle.

-  If Handle is NULL or Handle does not contain a device path protocol, then NULL

-  is returned.

-

-  @param  Handle                     The handle from which to retrieve the device

-                                     path protocol.

-

-  @return The device path protocol from the handle specified by Handle.

-

-**/

-EFI_DEVICE_PATH_PROTOCOL *

-EFIAPI

-DevicePathFromHandle (

-  IN EFI_HANDLE                      Handle

-  )

-{

-  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;

-  EFI_STATUS                Status;

-

-  Status = gBS->HandleProtocol (

-                  Handle,

-                  &gEfiDevicePathProtocolGuid,

-                  (VOID *) &DevicePath

-                  );

-  if (EFI_ERROR (Status)) {

-    DevicePath = NULL;

-  }

-  return DevicePath;

-}

-

-/**

   Allocates a device path for a file and appends it to an existing device path.

 

   If Device is a valid device handle that contains a device path protocol, then a device path for

diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c
new file mode 100644
index 0000000..7f3b607
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesDxeSmm.c
@@ -0,0 +1,51 @@
+/** @file

+  Device Path services. The thing to remember is device paths are built out of

+  nodes. The device path is terminated by an end node that is length

+  sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)

+  all over this file.

+

+  The only place where multi-instance device paths are supported is in

+  environment varibles. Multi-instance device paths should never be placed

+  on a Handle.

+

+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) Microsoft Corporation.

+  SPDX-License-Identifier: BSD-2-Clause-Patent

+

+**/

+

+#include "UefiDevicePathLib.h"

+

+

+/**

+  Retrieves the device path protocol from a handle.

+

+  This function returns the device path protocol from the handle specified by Handle.

+  If Handle is NULL or Handle does not contain a device path protocol, then NULL

+  is returned.

+

+  @param  Handle                     The handle from which to retrieve the device

+                                     path protocol.

+

+  @return The device path protocol from the handle specified by Handle.

+

+**/

+EFI_DEVICE_PATH_PROTOCOL *

+EFIAPI

+DevicePathFromHandle (

+  IN EFI_HANDLE                      Handle

+  )

+{

+  EFI_DEVICE_PATH_PROTOCOL  *DevicePath;

+  EFI_STATUS                Status;

+

+  Status = gBS->HandleProtocol (

+                  Handle,

+                  &gEfiDevicePathProtocolGuid,

+                  (VOID *) &DevicePath

+                  );

+  if (EFI_ERROR (Status)) {

+    DevicePath = NULL;

+  }

+  return DevicePath;

+}

diff --git a/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
new file mode 100644
index 0000000..930e778
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/DevicePathUtilitiesStandaloneMm.c
@@ -0,0 +1,40 @@
+/** @file

+  Device Path services. The thing to remember is device paths are built out of

+  nodes. The device path is terminated by an end node that is length

+  sizeof(EFI_DEVICE_PATH_PROTOCOL). That would be why there is sizeof(EFI_DEVICE_PATH_PROTOCOL)

+  all over this file.

+

+  The only place where multi-instance device paths are supported is in

+  environment varibles. Multi-instance device paths should never be placed

+  on a Handle.

+

+  Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>

+  Copyright (c) Microsoft Corporation.

+  SPDX-License-Identifier: BSD-2-Clause-Patent

+

+**/

+

+#include "UefiDevicePathLib.h"

+

+

+/**

+  Retrieves the device path protocol from a handle.

+

+  This function returns the device path protocol from the handle specified by Handle.

+  If Handle is NULL or Handle does not contain a device path protocol, then NULL

+  is returned.

+

+  @param  Handle                     The handle from which to retrieve the device

+                                     path protocol.

+

+  @return The device path protocol from the handle specified by Handle.

+

+**/

+EFI_DEVICE_PATH_PROTOCOL *

+EFIAPI

+DevicePathFromHandle (

+  IN EFI_HANDLE                      Handle

+  )

+{

+  return NULL;

+}

diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
index 3c41c06..eb85a54 100644
--- a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLib.inf
@@ -26,6 +26,7 @@
 

 [Sources]

   DevicePathUtilities.c

+  DevicePathUtilitiesDxeSmm.c

   DevicePathToText.c

   DevicePathFromText.c

   UefiDevicePathLib.c

diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
index e812e3e..81323bc 100644
--- a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibOptionalDevicePathProtocol.inf
@@ -29,6 +29,7 @@
 

 [Sources]

   DevicePathUtilities.c

+  DevicePathUtilitiesDxeSmm.c

   DevicePathToText.c

   DevicePathFromText.c

   UefiDevicePathLibOptionalDevicePathProtocol.c

diff --git a/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
new file mode 100644
index 0000000..23fedf3
--- /dev/null
+++ b/MdePkg/Library/UefiDevicePathLib/UefiDevicePathLibStandaloneMm.inf
@@ -0,0 +1,75 @@
+## @file

+# Instance of Device Path Library based on Memory Allocation Library.

+#

+# Device Path Library that layers on top of the Memory Allocation Library.

+#

+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>

+# Copyright (c) Microsoft Corporation.

+#

+#  SPDX-License-Identifier: BSD-2-Clause-Patent

+#

+#

+##

+

+[Defines]

+  INF_VERSION                    = 0x00010005

+  BASE_NAME                      = UefiDevicePathLib

+  MODULE_UNI_FILE                = UefiDevicePathLib.uni

+  FILE_GUID                      = D8E58437-44D3-4154-B7A7-EB794923EF12

+  MODULE_TYPE                    = MM_STANDALONE

+  PI_SPECIFICATION_VERSION       = 0x00010032

+  VERSION_STRING                 = 1.0

+  LIBRARY_CLASS                  = DevicePathLib | MM_STANDALONE MM_CORE_STANDALONE

+

+

+#

+#  VALID_ARCHITECTURES           = IA32 X64 EBC

+#

+

+[Sources]

+  DevicePathUtilities.c

+  DevicePathUtilitiesStandaloneMm.c

+  DevicePathToText.c

+  DevicePathFromText.c

+  UefiDevicePathLib.c

+  UefiDevicePathLib.h

+

+[Packages]

+  MdePkg/MdePkg.dec

+

+[LibraryClasses]

+  BaseLib

+  MemoryAllocationLib

+  DebugLib

+  BaseMemoryLib

+  PcdLib

+  PrintLib

+

+[Guids]

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiVTUTF8Guid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiVT100Guid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiVT100PlusGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiPcAnsiGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiUartDevicePathGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiSasDevicePathGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiVirtualDiskGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiVirtualCdGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiPersistentVirtualDiskGuid

+  ## SOMETIMES_CONSUMES  ## GUID

+  gEfiPersistentVirtualCdGuid

+

+[Protocols]

+  gEfiDevicePathProtocolGuid                    ## SOMETIMES_CONSUMES

+  gEfiDebugPortProtocolGuid                     ## UNDEFINED

+

+[Pcd]

+  gEfiMdePkgTokenSpaceGuid.PcdMaximumDevicePathNodeCount    ## SOMETIMES_CONSUMES