示例#1
0
EFIAPI
AppendDevicePathInstanceProtocolInterface (
  IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePath,
  IN CONST EFI_DEVICE_PATH_PROTOCOL *DevicePathInstance
  )
{
  return AppendDevicePathInstance (DevicePath, DevicePathInstance);
}
示例#2
0
STATIC
EFI_STATUS
SupportedDevicePathsInit (
  VOID
  )
{
  EFI_STATUS                          Status;
  CHAR16*                             DevicePathListStr;
  CHAR16*                             DevicePathStr;
  CHAR16*                             NextDevicePathStr;
  EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *EfiDevicePathFromTextProtocol;
  EFI_DEVICE_PATH_PROTOCOL           *Instance;

  Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);
  ASSERT_EFI_ERROR (Status);

  // Initialize Variable
  DevicePathListStr = (CHAR16*)PcdGetPtr (PcdBootMonFsSupportedDevicePaths);
  mBootMonFsSupportedDevicePaths = NULL;

  // Extract the Device Path instances from the multi-device path string
  while ((DevicePathListStr != NULL) && (DevicePathListStr[0] != L'\0')) {
    NextDevicePathStr = StrStr (DevicePathListStr, L";");
    if (NextDevicePathStr == NULL) {
      DevicePathStr = DevicePathListStr;
      DevicePathListStr = NULL;
    } else {
      DevicePathStr = (CHAR16*)AllocateCopyPool ((NextDevicePathStr - DevicePathListStr + 1) * sizeof (CHAR16), DevicePathListStr);
      if (DevicePathStr == NULL) {
        return EFI_OUT_OF_RESOURCES;
      }
      *(DevicePathStr + (NextDevicePathStr - DevicePathListStr)) = L'\0';
      DevicePathListStr = NextDevicePathStr;
      if (DevicePathListStr[0] == L';') {
        DevicePathListStr++;
      }
    }

    Instance = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (DevicePathStr);
    ASSERT (Instance != NULL);
    mBootMonFsSupportedDevicePaths = AppendDevicePathInstance (mBootMonFsSupportedDevicePaths, Instance);

    if (NextDevicePathStr != NULL) {
      FreePool (DevicePathStr);
    }
    FreePool (Instance);
  }

  if (mBootMonFsSupportedDevicePaths == NULL) {
    return EFI_UNSUPPORTED;
  } else {
    return EFI_SUCCESS;
  }
}
示例#3
0
/**
  Connect all the system drivers to controllers and create the network device list in NV storage.

  @retval EFI_SUCCESS      Network devices are connected.
  @retval EFI_DEVICE_ERROR No network device is connected.

**/
EFI_STATUS
ConnectAllAndCreateNetworkDeviceList (
  VOID
  )
{
  EFI_STATUS                      Status;
  EFI_HANDLE                      *Handles;
  UINTN                           HandleCount;
  EFI_DEVICE_PATH_PROTOCOL        *SingleDevice;
  EFI_DEVICE_PATH_PROTOCOL        *Devices;
  EFI_DEVICE_PATH_PROTOCOL        *TempDevicePath;

  EfiBootManagerConnectAll ();

  Status = gBS->LocateHandleBuffer (ByProtocol, &gEfiManagedNetworkServiceBindingProtocolGuid, NULL, &HandleCount, &Handles);
  if (EFI_ERROR (Status)) {
    Handles = NULL;
    HandleCount = 0;
  }

  Devices = NULL;
  while (HandleCount-- != 0) {
    Status = gBS->HandleProtocol (Handles[HandleCount], &gEfiDevicePathProtocolGuid, (VOID **) &SingleDevice);
    if (EFI_ERROR (Status) || (SingleDevice == NULL)) {
      continue;
    }
    TempDevicePath = Devices;
    Devices = AppendDevicePathInstance (Devices, SingleDevice);
    if (TempDevicePath != NULL) {
      FreePool (TempDevicePath);
    }
  }

  if (Devices != NULL) {
    Status = gRT->SetVariable (
                    mNetworkDeviceList,
                    &gEfiCallerIdGuid,
                    EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE,
                    GetDevicePathSize (Devices),
                    Devices
                    );
    //
    // Fails to save the network device list to NV storage is not a fatal error.
    // Only impact is performance.
    //
    FreePool (Devices);
  }

  return (Devices == NULL) ? EFI_DEVICE_ERROR : EFI_SUCCESS;
}
示例#4
0
文件: BdsMisc.c 项目: jief666/clover
EFIAPI
BdsLibDelPartMatchInstance (
  IN     EFI_DEVICE_PATH_PROTOCOL  *Multi,
  IN     EFI_DEVICE_PATH_PROTOCOL  *Single
  )
{
  EFI_DEVICE_PATH_PROTOCOL  *Instance;
  EFI_DEVICE_PATH_PROTOCOL  *NewDevicePath;
  EFI_DEVICE_PATH_PROTOCOL  *TempNewDevicePath;
  UINTN                     InstanceSize;
  UINTN                     SingleDpSize;
  UINTN                     Size;

  NewDevicePath     = NULL;
  TempNewDevicePath = NULL;

  if (Multi == NULL || Single == NULL) {
    return Multi;
  }

  Instance        =  GetNextDevicePathInstance (&Multi, &InstanceSize);
  SingleDpSize    =  GetDevicePathSize (Single) - END_DEVICE_PATH_LENGTH;
  InstanceSize    -= END_DEVICE_PATH_LENGTH;

  while (Instance != NULL) {

    Size = (SingleDpSize < InstanceSize) ? SingleDpSize : InstanceSize;

    if ((CompareMem (Instance, Single, Size) != 0)) {
      //
      // Append the device path instance which does not match with Single
      //
      TempNewDevicePath = NewDevicePath;
      NewDevicePath = AppendDevicePathInstance (NewDevicePath, Instance);
      if (TempNewDevicePath != NULL) {
        FreePool(TempNewDevicePath);
      }
    }
    FreePool(Instance);
    Instance = GetNextDevicePathInstance (&Multi, &InstanceSize);
    InstanceSize  -= END_DEVICE_PATH_LENGTH;
  }

  return NewDevicePath;
}
示例#5
0
/**
  This function delete and build multi-instance device path for
  specified type of console device.

  This function clear the EFI variable defined by ConsoleName and
  gEfiGlobalVariableGuid. It then build the multi-instance device
  path by appending the device path of the Console (In/Out/Err) instance 
  in ConsoleMenu. Then it scan all corresponding console device by
  scanning Terminal (built from device supporting Serial I/O instances)
  devices in TerminalMenu. At last, it save a EFI variable specifed
  by ConsoleName and gEfiGlobalVariableGuid.

  @param ConsoleName     The name for the console device type. They are
                         usually "ConIn", "ConOut" and "ErrOut".
  @param ConsoleMenu     The console memu which is a list of console devices.
  @param UpdatePageId    The flag specifying which type of console device
                         to be processed.

  @retval EFI_SUCCESS    The function complete successfully.
  @return The EFI variable can not be saved. See gRT->SetVariable for detail return information.

**/
EFI_STATUS
Var_UpdateConsoleOption (
  IN UINT16                     *ConsoleName,
  IN BM_MENU_OPTION             *ConsoleMenu,
  IN UINT16                     UpdatePageId
  )
{
  EFI_DEVICE_PATH_PROTOCOL  *ConDevicePath;
  BM_MENU_ENTRY             *NewMenuEntry;
  BM_CONSOLE_CONTEXT        *NewConsoleContext;
  BM_TERMINAL_CONTEXT       *NewTerminalContext;
  EFI_STATUS                Status;
  VENDOR_DEVICE_PATH        Vendor;
  EFI_DEVICE_PATH_PROTOCOL  *TerminalDevicePath;
  UINTN                     Index;

  GetEfiGlobalVariable2 (ConsoleName, (VOID**)&ConDevicePath, NULL);
  if (ConDevicePath != NULL) {
    EfiLibDeleteVariable (ConsoleName, &gEfiGlobalVariableGuid);
    FreePool (ConDevicePath);
    ConDevicePath = NULL;
  };

  //
  // First add all console input device from console input menu
  //
  for (Index = 0; Index < ConsoleMenu->MenuNumber; Index++) {
    NewMenuEntry = BOpt_GetMenuEntry (ConsoleMenu, Index);

    NewConsoleContext = (BM_CONSOLE_CONTEXT *) NewMenuEntry->VariableContext;
    if (NewConsoleContext->IsActive) {
      ConDevicePath = AppendDevicePathInstance (
                        ConDevicePath,
                        NewConsoleContext->DevicePath
                        );
    }
  }

  for (Index = 0; Index < TerminalMenu.MenuNumber; Index++) {
    NewMenuEntry = BOpt_GetMenuEntry (&TerminalMenu, Index);

    NewTerminalContext = (BM_TERMINAL_CONTEXT *) NewMenuEntry->VariableContext;
    if (((NewTerminalContext->IsConIn != 0) && (UpdatePageId == FORM_CON_IN_ID)) ||
        ((NewTerminalContext->IsConOut != 0)  && (UpdatePageId == FORM_CON_OUT_ID)) ||
        ((NewTerminalContext->IsStdErr  != 0) && (UpdatePageId == FORM_CON_ERR_ID))
        ) {
      Vendor.Header.Type    = MESSAGING_DEVICE_PATH;
      Vendor.Header.SubType = MSG_VENDOR_DP;
      
      ASSERT (NewTerminalContext->TerminalType < (sizeof (TerminalTypeGuid) / sizeof (TerminalTypeGuid[0])));
      CopyMem (
        &Vendor.Guid,
        &TerminalTypeGuid[NewTerminalContext->TerminalType],
        sizeof (EFI_GUID)
        );
      SetDevicePathNodeLength (&Vendor.Header, sizeof (VENDOR_DEVICE_PATH));
      TerminalDevicePath = AppendDevicePathNode (
                            NewTerminalContext->DevicePath,
                            (EFI_DEVICE_PATH_PROTOCOL *) &Vendor
                            );
      ASSERT (TerminalDevicePath != NULL);
      ChangeTerminalDevicePath (TerminalDevicePath, TRUE);
      ConDevicePath = AppendDevicePathInstance (
                        ConDevicePath,
                        TerminalDevicePath
                        );
    }
  }

  if (ConDevicePath != NULL) {
    Status = gRT->SetVariable (
                    ConsoleName,
                    &gEfiGlobalVariableGuid,
                    VAR_FLAG,
                    GetDevicePathSize (ConDevicePath),
                    ConDevicePath
                    );
    if (EFI_ERROR (Status)) {
      return Status;
    }
  }

  return EFI_SUCCESS;

}
示例#6
0
文件: Bds.c 项目: binsys/VisualUefi
STATIC
EFI_STATUS
GetConsoleDevicePathFromVariable (
  IN  CHAR16*             ConsoleVarName,
  IN  CHAR16*             DefaultConsolePaths,
  OUT EFI_DEVICE_PATH**   DevicePaths
  )
{
  EFI_STATUS                Status;
  UINTN                     Size;
  EFI_DEVICE_PATH_PROTOCOL* DevicePathInstances;
  EFI_DEVICE_PATH_PROTOCOL* DevicePathInstance;
  CHAR16*                   DevicePathStr;
  CHAR16*                   NextDevicePathStr;
  EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL  *EfiDevicePathFromTextProtocol;

  Status = GetGlobalEnvironmentVariable (ConsoleVarName, NULL, NULL, (VOID**)&DevicePathInstances);
  if (EFI_ERROR(Status)) {
    // In case no default console device path has been defined we assume a driver handles the console (eg: SimpleTextInOutSerial)
    if ((DefaultConsolePaths == NULL) || (DefaultConsolePaths[0] == L'\0')) {
      *DevicePaths = NULL;
      return EFI_SUCCESS;
    }

    Status = gBS->LocateProtocol (&gEfiDevicePathFromTextProtocolGuid, NULL, (VOID **)&EfiDevicePathFromTextProtocol);
    ASSERT_EFI_ERROR(Status);

    DevicePathInstances = NULL;

    // Extract the Device Path instances from the multi-device path string
    while ((DefaultConsolePaths != NULL) && (DefaultConsolePaths[0] != L'\0')) {
      NextDevicePathStr = StrStr (DefaultConsolePaths, L";");
      if (NextDevicePathStr == NULL) {
        DevicePathStr = DefaultConsolePaths;
        DefaultConsolePaths = NULL;
      } else {
        DevicePathStr = (CHAR16*)AllocateCopyPool ((NextDevicePathStr - DefaultConsolePaths + 1) * sizeof(CHAR16), DefaultConsolePaths);
        *(DevicePathStr + (NextDevicePathStr - DefaultConsolePaths)) = L'\0';
        DefaultConsolePaths = NextDevicePathStr;
        if (DefaultConsolePaths[0] == L';') {
          DefaultConsolePaths++;
        }
      }

      DevicePathInstance = EfiDevicePathFromTextProtocol->ConvertTextToDevicePath (DevicePathStr);
      ASSERT(DevicePathInstance != NULL);
      DevicePathInstances = AppendDevicePathInstance (DevicePathInstances, DevicePathInstance);

      if (NextDevicePathStr != NULL) {
        FreePool (DevicePathStr);
      }
      FreePool (DevicePathInstance);
    }

    // Set the environment variable with this device path multi-instances
    Size = GetDevicePathSize (DevicePathInstances);
    if (Size > 0) {
      gRT->SetVariable (
          ConsoleVarName,
          &gEfiGlobalVariableGuid,
          EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS,
          Size,
          DevicePathInstances
          );
    } else {
      Status = EFI_INVALID_PARAMETER;
    }
  }

  if (!EFI_ERROR(Status)) {
    *DevicePaths = DevicePathInstances;
  }
  return Status;
}
示例#7
0
/**
  This function update console variable based on ConVarName, it can
  add or remove one specific console device path from the variable

  @param  ConVarName               Console related variable name, ConIn, ConOut,
                                   ErrOut.
  @param  CustomizedConDevicePath  The console device path which will be added to
                                   the console variable ConVarName, this parameter
                                   can not be multi-instance.
  @param  ExclusiveDevicePath      The console device path which will be removed
                                   from the console variable ConVarName, this
                                   parameter can not be multi-instance.

  @retval EFI_UNSUPPORTED          The added device path is same to the removed one.
  @retval EFI_SUCCESS              Success add or remove the device path from  the
                                   console variable.

**/
EFI_STATUS
EFIAPI
BdsLibUpdateConsoleVariable (
  IN  CHAR16                    *ConVarName,
  IN  EFI_DEVICE_PATH_PROTOCOL  *CustomizedConDevicePath,
  IN  EFI_DEVICE_PATH_PROTOCOL  *ExclusiveDevicePath
  )
{
  EFI_STATUS                Status;
  EFI_DEVICE_PATH_PROTOCOL  *VarConsole;
  UINTN                     DevicePathSize;
  EFI_DEVICE_PATH_PROTOCOL  *NewDevicePath;
  EFI_DEVICE_PATH_PROTOCOL  *TempNewDevicePath;
  UINT32                    Attributes;

  VarConsole      = NULL;
  DevicePathSize  = 0;

  //
  // Notes: check the device path point, here should check
  // with compare memory
  //
  if (CustomizedConDevicePath == ExclusiveDevicePath) {
    return EFI_UNSUPPORTED;
  }
  //
  // Delete the ExclusiveDevicePath from current default console
  //
  VarConsole = BdsLibGetVariableAndSize (
                ConVarName,
                &gEfiGlobalVariableGuid,
                &DevicePathSize
                );

  //
  // Initialize NewDevicePath
  //
  NewDevicePath  = VarConsole;

  //
  // If ExclusiveDevicePath is even the part of the instance in VarConsole, delete it.
  // In the end, NewDevicePath is the final device path.
  //
  if (ExclusiveDevicePath != NULL && VarConsole != NULL) {
      NewDevicePath = BdsLibDelPartMatchInstance (VarConsole, ExclusiveDevicePath);
  }
  //
  // Try to append customized device path to NewDevicePath.
  //
  if (CustomizedConDevicePath != NULL) {
    if (!BdsLibMatchDevicePaths (NewDevicePath, CustomizedConDevicePath)) {
      //
      // Check if there is part of CustomizedConDevicePath in NewDevicePath, delete it.
      //
      NewDevicePath = BdsLibDelPartMatchInstance (NewDevicePath, CustomizedConDevicePath);
      //
      // In the first check, the default console variable will be _ModuleEntryPoint,
      // just append current customized device path
      //
      TempNewDevicePath = NewDevicePath;
      NewDevicePath = AppendDevicePathInstance (NewDevicePath, CustomizedConDevicePath);
      if (TempNewDevicePath != NULL) {
        FreePool(TempNewDevicePath);
      }
    }
  }

  //
  // The attribute for ConInDev, ConOutDev and ErrOutDev does not include NV.
  //
  if (IsNvNeed(ConVarName)) {
    //
    // ConVarName has NV attribute.
    //
    Attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE;
  } else {
    //
    // ConVarName does not have NV attribute.
    //
    Attributes = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
  }

  //
  // Finally, Update the variable of the default console by NewDevicePath
  //
  DevicePathSize = GetDevicePathSize (NewDevicePath);
  Status = SetVariableAndReportStatusCodeOnError (
             ConVarName,
             &gEfiGlobalVariableGuid,
             Attributes,
             DevicePathSize,
             NewDevicePath
             );
  if ((DevicePathSize == 0) && (Status == EFI_NOT_FOUND)) {
    Status = EFI_SUCCESS;
  }

  if (VarConsole == NewDevicePath) {
    if (VarConsole != NULL) {
      FreePool(VarConsole);
    }
  } else {
    if (VarConsole != NULL) {
      FreePool(VarConsole);
    }
    if (NewDevicePath != NULL) {
      FreePool(NewDevicePath);
    }
  }

  return Status;

}
示例#8
0
/**
  This function updates the console variable based on ConVarName. It can
  add or remove one specific console device path from the variable

  @param  ConsoleType              ConIn, ConOut, ErrOut, ConInDev, ConOutDev or ErrOutDev.
  @param  CustomizedConDevicePath  The console device path to be added to
                                   the console variable. Cannot be multi-instance.
  @param  ExclusiveDevicePath      The console device path to be removed
                                   from the console variable. Cannot be multi-instance.

  @retval EFI_UNSUPPORTED          The added device path is the same as a removed one.
  @retval EFI_SUCCESS              Successfully added or removed the device path from the
                                   console variable.
  @retval others                   Return status of RT->SetVariable().

**/
EFI_STATUS
EFIAPI
EfiBootManagerUpdateConsoleVariable (
  IN  CONSOLE_TYPE              ConsoleType,
  IN  EFI_DEVICE_PATH_PROTOCOL  *CustomizedConDevicePath,
  IN  EFI_DEVICE_PATH_PROTOCOL  *ExclusiveDevicePath
  )
{
  EFI_STATUS                Status;
  EFI_DEVICE_PATH_PROTOCOL  *VarConsole;
  EFI_DEVICE_PATH_PROTOCOL  *NewDevicePath;
  EFI_DEVICE_PATH_PROTOCOL  *TempNewDevicePath;

  if (ConsoleType >= sizeof (mConVarName) / sizeof (mConVarName[0])) {
    return EFI_INVALID_PARAMETER;
  }

  //
  // Notes: check the device path point, here should check
  // with compare memory
  //
  if (CustomizedConDevicePath == ExclusiveDevicePath) {
    return EFI_UNSUPPORTED;
  }
  //
  // Delete the ExclusiveDevicePath from current default console
  //
  GetEfiGlobalVariable2 (mConVarName[ConsoleType], (VOID **) &VarConsole, NULL);
  //
  // Initialize NewDevicePath
  //
  NewDevicePath = VarConsole;

  //
  // If ExclusiveDevicePath is even the part of the instance in VarConsole, delete it.
  // In the end, NewDevicePath is the final device path.
  //
  if (ExclusiveDevicePath != NULL && VarConsole != NULL) {
      NewDevicePath = BmDelPartMatchInstance (VarConsole, ExclusiveDevicePath);
  }
  //
  // Try to append customized device path to NewDevicePath.
  //
  if (CustomizedConDevicePath != NULL) {
    if (!BmMatchDevicePaths (NewDevicePath, CustomizedConDevicePath)) {
      //
      // Check if there is part of CustomizedConDevicePath in NewDevicePath, delete it.
      //
      NewDevicePath = BmDelPartMatchInstance (NewDevicePath, CustomizedConDevicePath);
      //
      // In the first check, the default console variable will be _ModuleEntryPoint,
      // just append current customized device path
      //
      TempNewDevicePath = NewDevicePath;
      NewDevicePath = AppendDevicePathInstance (NewDevicePath, CustomizedConDevicePath);
      if (TempNewDevicePath != NULL) {
        FreePool(TempNewDevicePath);
      }
    }
  }

  //
  // Finally, Update the variable of the default console by NewDevicePath
  //
  Status = gRT->SetVariable (
                  mConVarName[ConsoleType],
                  &gEfiGlobalVariableGuid,
                  EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS
                                                  | ((ConsoleType < ConInDev) ? EFI_VARIABLE_NON_VOLATILE : 0),
                  GetDevicePathSize (NewDevicePath),
                  NewDevicePath
                  );

  if (VarConsole == NewDevicePath) {
    if (VarConsole != NULL) {
      FreePool(VarConsole);
    }
  } else {
    if (VarConsole != NULL) {
      FreePool(VarConsole);
    }
    if (NewDevicePath != NULL) {
      FreePool(NewDevicePath);
    }
  }

  return Status;
}
示例#9
0
EFIAPI
EfiBootManagerGetGopDevicePath (
  IN  EFI_HANDLE                       VideoController
  )
{
  UINTN                                Index;
  EFI_STATUS                           Status;
  EFI_GUID                             **ProtocolBuffer;
  UINTN                                ProtocolBufferCount;
  UINTN                                ProtocolIndex;
  EFI_OPEN_PROTOCOL_INFORMATION_ENTRY  *OpenInfoBuffer;
  UINTN                                EntryCount;
  EFI_DEVICE_PATH_PROTOCOL             *DevicePath;
  EFI_DEVICE_PATH_PROTOCOL             *Next;
  EFI_DEVICE_PATH_PROTOCOL             *Previous;
  EFI_DEVICE_PATH_PROTOCOL             *TempDevicePath;
  EFI_DEVICE_PATH_PROTOCOL             *GopPool;
  EFI_DEVICE_PATH_PROTOCOL             *ReturnDevicePath;


  Status = gBS->ProtocolsPerHandle (
                  VideoController,
                  &ProtocolBuffer,
                  &ProtocolBufferCount
                  );
  if (EFI_ERROR (Status)) {
    return NULL;
  }

  GopPool = NULL;

  for (ProtocolIndex = 0; ProtocolIndex < ProtocolBufferCount; ProtocolIndex++) {
    Status = gBS->OpenProtocolInformation (
                    VideoController,
                    ProtocolBuffer[ProtocolIndex],
                    &OpenInfoBuffer,
                    &EntryCount
                    );
    if (EFI_ERROR (Status)) {
      continue;
    }

    for (Index = 0; Index < EntryCount; Index++) {
      //
      // Query all the children
      //
      if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
        Status = gBS->OpenProtocol (
                        OpenInfoBuffer[Index].ControllerHandle,
                        &gEfiDevicePathProtocolGuid,
                        (VOID **) &DevicePath,
                        NULL,
                        NULL,
                        EFI_OPEN_PROTOCOL_GET_PROTOCOL
                        );
        if (EFI_ERROR (Status)) {
          continue;
        }

        Previous = NULL;
        for (Next = DevicePath; !IsDevicePathEnd (Next); Next = NextDevicePathNode (Next)) {
          Previous = Next;
        }
        ASSERT (Previous != NULL);

        if (DevicePathType (Previous) == ACPI_DEVICE_PATH && DevicePathSubType (Previous) == ACPI_ADR_DP) {
          Status = gBS->OpenProtocol (
                          OpenInfoBuffer[Index].ControllerHandle,
                          &gEfiGraphicsOutputProtocolGuid,
                          NULL,
                          NULL,
                          NULL,
                          EFI_OPEN_PROTOCOL_TEST_PROTOCOL
                          );
          if (!EFI_ERROR (Status)) {
            //
            // Append the device path to GOP pool when there is GOP protocol installed.
            //
            TempDevicePath = GopPool;
            GopPool = AppendDevicePathInstance (GopPool, DevicePath);
            gBS->FreePool (TempDevicePath);
          }
        }

        if (DevicePathType (Previous) == HARDWARE_DEVICE_PATH && DevicePathSubType (Previous) == HW_CONTROLLER_DP) {
          //
          // Recursively look for GOP child in this frame buffer handle
          //
          DEBUG ((EFI_D_INFO, "[Bds] Looking for GOP child deeper ... \n"));
          TempDevicePath = GopPool;
          ReturnDevicePath = EfiBootManagerGetGopDevicePath (OpenInfoBuffer[Index].ControllerHandle);
          GopPool = AppendDevicePathInstance (GopPool, ReturnDevicePath);
          gBS->FreePool (ReturnDevicePath);
          gBS->FreePool (TempDevicePath);
        }
      }
    }

    FreePool (OpenInfoBuffer);
  }

  FreePool (ProtocolBuffer);

  return GopPool;
}
示例#10
0
EFIAPI
EfiBootManagerGetGopDevicePath (
  IN  EFI_HANDLE               VideoController
  )
{
  UINTN                                Index;
  EFI_STATUS                           Status;
  EFI_DEVICE_PATH_PROTOCOL             *TempDevicePath;
  EFI_DEVICE_PATH_PROTOCOL             *ChildDevicePath;
  EFI_DEVICE_PATH_PROTOCOL             *GopPool;
  EFI_OPEN_PROTOCOL_INFORMATION_ENTRY  *OpenInfoBuffer;
  UINTN                                EntryCount;

  ASSERT (VideoController != NULL);

  GopPool = NULL;

  Status = gBS->OpenProtocolInformation (
                  VideoController,
                  &gEfiPciIoProtocolGuid,
                  &OpenInfoBuffer,
                  &EntryCount
                  );
  if (EFI_ERROR (Status)) {
    EntryCount = 0;
  }

  for (Index = 0; Index < EntryCount; Index++) {
    //
    // Query all the children created by the GOP driver
    //
    if ((OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) {
      Status = gBS->OpenProtocol (
                      OpenInfoBuffer[Index].ControllerHandle,
                      &gEfiDevicePathProtocolGuid,
                      (VOID **) &ChildDevicePath,
                      NULL,
                      NULL,
                      EFI_OPEN_PROTOCOL_GET_PROTOCOL
                      );
      if (!EFI_ERROR (Status)) {
        Status = gBS->OpenProtocol (
                        OpenInfoBuffer[Index].ControllerHandle,
                        &gEfiGraphicsOutputProtocolGuid,
                        NULL,
                        NULL,
                        NULL,
                        EFI_OPEN_PROTOCOL_TEST_PROTOCOL
                        );
        if (!EFI_ERROR (Status)) {
          //
          // Append the device path to GOP pool when there is GOP protocol installed.
          //
          TempDevicePath = GopPool;
          GopPool = AppendDevicePathInstance (GopPool, ChildDevicePath);
          if (TempDevicePath != NULL) {
            FreePool (TempDevicePath);
          }
        }
      }
    }
  }
  FreePool (OpenInfoBuffer);

  return GopPool;
}