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[mirror_edk2.git] / ArmPkg / Library / ArmMtlNullLib / ArmMtlNullLib.c

/** @file\r
\r
  Copyright (c) 2017-2018, Arm Limited. All rights reserved.\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
  System Control and Management Interface V1.0\r
    http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/\r
    DEN0056A_System_Control_and_Management_Interface.pdf\r
**/\r
\r
#include <Library/ArmMtlLib.h>\r
#include <Library/DebugLib.h>\r
\r
/** Wait until channel is free.\r
\r
  @param[in] Channel                Pointer to a channel.\r
  @param[in] TimeOutInMicroSeconds  Timeout in micro seconds.\r
\r
  @retval EFI_UNSUPPORTED           Interface not implemented.\r
**/\r
EFI_STATUS\r
MtlWaitUntilChannelFree (\r
  IN MTL_CHANNEL  *Channel,\r
  IN UINTN        TimeOutInMicroSeconds\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/** Return the address of the message payload.\r
\r
  @param[in] Channel   Pointer to a channel.\r
\r
  @retval UINT32*      Pointer to the payload.\r
**/\r
UINT32 *\r
MtlGetChannelPayload (\r
  IN  MTL_CHANNEL  *Channel\r
  )\r
{\r
  ASSERT (FALSE);\r
  return NULL;\r
}\r
\r
/** Return pointer to a channel for the requested channel type.\r
\r
  @param[in] ChannelType        ChannelType, Low or High priority channel.\r
                                MTL_CHANNEL_TYPE_LOW or\r
                                MTL_CHANNEL_TYPE_HIGH\r
\r
  @param[out] Channel           Holds pointer to the channel.\r
\r
  @retval EFI_UNSUPPORTED       Requested channel type not supported or\r
                                interface not implemented.\r
**/\r
EFI_STATUS\r
MtlGetChannel (\r
  IN  MTL_CHANNEL_TYPE  ChannelType,\r
  OUT MTL_CHANNEL       **Channel\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/** Mark the channel busy and ring the doorbell.\r
\r
  @param[in] Channel               Pointer to a channel.\r
  @param[in] MessageHeader         Message header.\r
\r
  @param[out] PayloadLength        Message length.\r
\r
  @retval EFI_UNSUPPORTED          Interface not implemented.\r
**/\r
EFI_STATUS\r
MtlSendMessage (\r
  IN  MTL_CHANNEL  *Channel,\r
  IN  UINT32       MessageHeader,\r
  OUT UINT32       PayloadLength\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/** Wait for a response on a channel.\r
\r
  If channel is free after sending message, it implies SCP responded\r
  with a response on the channel.\r
\r
  @param[in] Channel               Pointer to a channel.\r
\r
  @retval EFI_UNSUPPORTED          Interface not implemented.\r
**/\r
EFI_STATUS\r
MtlReceiveMessage (\r
  IN  MTL_CHANNEL  *Channel,\r
  OUT UINT32       *MessageHeader,\r
  OUT UINT32       *PayloadLength\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r