2 files changed, 122 insertions, 0 deletions
diff --git a/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.c b/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.c
new file mode 100644
index 000000000..8dc2d07e3
--- /dev/null
+++ b/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.c
@@ -0,0 +1,102 @@
+/** @file
+
+  Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+  System Control and Management Interface V1.0
+    http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/
+    DEN0056A_System_Control_and_Management_Interface.pdf
+**/
+
+#include <Library/ArmMtlLib.h>
+#include <Library/DebugLib.h>
+
+/** Wait until channel is free.
+
+  @param[in] Channel                Pointer to a channel.
+  @param[in] TimeOutInMicroSeconds  Timeout in micro seconds.
+
+  @retval EFI_UNSUPPORTED           Interface not implemented.
+**/
+EFI_STATUS
+MtlWaitUntilChannelFree (
+  IN MTL_CHANNEL  *Channel,
+  IN UINTN        TimeOutInMicroSeconds
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/** Return the address of the message payload.
+
+  @param[in] Channel   Pointer to a channel.
+
+  @retval UINT32*      Pointer to the payload.
+**/
+UINT32*
+MtlGetChannelPayload (
+  IN  MTL_CHANNEL  *Channel
+  )
+{
+  ASSERT (FALSE);
+  return NULL;
+}
+
+/** Return pointer to a channel for the requested channel type.
+
+  @param[in] ChannelType        ChannelType, Low or High priority channel.
+                                MTL_CHANNEL_TYPE_LOW or
+                                MTL_CHANNEL_TYPE_HIGH
+
+  @param[out] Channel           Holds pointer to the channel.
+
+  @retval EFI_UNSUPPORTED       Requested channel type not supported or
+                                interface not implemented.
+**/
+EFI_STATUS
+MtlGetChannel (
+  IN  MTL_CHANNEL_TYPE  ChannelType,
+  OUT MTL_CHANNEL       **Channel
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/** Mark the channel busy and ring the doorbell.
+
+  @param[in] Channel               Pointer to a channel.
+  @param[in] MessageHeader         Message header.
+
+  @param[out] PayloadLength        Message length.
+
+  @retval EFI_UNSUPPORTED          Interface not implemented.
+**/
+EFI_STATUS
+MtlSendMessage (
+  IN  MTL_CHANNEL  *Channel,
+  IN  UINT32       MessageHeader,
+  OUT UINT32       PayloadLength
+  )
+{
+  return EFI_UNSUPPORTED;
+}
+
+/** Wait for a response on a channel.
+
+  If channel is free after sending message, it implies SCP responded
+  with a response on the channel.
+
+  @param[in] Channel               Pointer to a channel.
+
+  @retval EFI_UNSUPPORTED          Interface not implemented.
+**/
+EFI_STATUS
+MtlReceiveMessage (
+  IN  MTL_CHANNEL  *Channel,
+  OUT UINT32       *MessageHeader,
+  OUT UINT32       *PayloadLength
+  )
+{
+  return EFI_UNSUPPORTED;
+}
diff --git a/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.inf b/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.inf
new file mode 100644
index 000000000..605c27208
--- /dev/null
+++ b/roms/edk2/ArmPkg/Library/ArmMtlNullLib/ArmMtlNullLib.inf
@@ -0,0 +1,20 @@
+#/** @file
+#  Copyright (c) 2017-2018, Arm Limited. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010019
+  BASE_NAME                      = ArmMtlNullLib
+  FILE_GUID                      = 05810525-FDEC-4006-9F1F-37609B3675FA
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = ArmMtlLib
+
+[Sources.common]
+  ArmMtlNullLib.c
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  MdePkg/MdePkg.dec