On 23 October 2017 at 11:26, Leif Lindholm <leif.lindh...@linaro.org> wrote:
> On Fri, Oct 20, 2017 at 10:24:04PM +0100, Ard Biesheuvel wrote:
>> Linux on ARM/arm64 will infer from the presence of a /chosen/stdout-path
>> DT property or of a SPCR ACPI table that the primary console is the serial
>> port, even if a graphical console is available as well.
>>
>> So let's introduce a driver that allows the user to set a preference
>> between graphical and serial if both are available. If the preference
>> is set to 'Graphical', and any GOP protocol instances have been installed
>> by the time the ReadyToBoot event is signalled, remove the DT property
>> and/or the SPCR table entirely.
>>
>> Contributed-under: TianoCore Contribution Agreement 1.1
>> Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
>
> I don't have any comments beyond what I said for v1 - so many
> thanks for doing this rework!
>
> Reviewed-by: Leif Lindholm <leif.lindh...@linaro.org>
>

Pushed as d8e36289cef7bde628b023219cd65fa8e8d4562a

Thanks

>> ---
>> v3: - as suggested by Laszlo, move all logic into the OnReadyToBoot event
>>       callback so there is no need to register protocol notification handlers
>>       to look for the SDT protocol
>>     - fixed overly long lines in license blocks
>>
>> v2: - use protocol register notify for gEfiAcpiSdtProtocolGuid, this is
>>       necessary because we may be loaded before the driver that produces it,
>>       and we cannot Depex on it either (because it is optional)
>>     - add missing changes to .dec and Include/ files
>>
>>  EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.c   | 293 
>> ++++++++++++++++++++
>>  EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.h   |  31 +++
>>  EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.inf |  62 +++++
>>  EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.uni |  27 ++
>>  EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.vfr |  51 ++++
>>  EmbeddedPkg/EmbeddedPkg.dec                           |   3 +
>>  EmbeddedPkg/Include/Guid/ConsolePrefFormSet.h         |  23 ++
>>  7 files changed, 490 insertions(+)
>>
>> diff --git a/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.c 
>> b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.c
>> new file mode 100644
>> index 000000000000..996d1a6036b9
>> --- /dev/null
>> +++ b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.c
>> @@ -0,0 +1,293 @@
>> +/** @file
>> +*
>> +*  Copyright (c) 2017, Linaro, Ltd. All rights reserved.
>> +*
>> +*  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 <Uefi.h>
>> +#include <IndustryStandard/Acpi.h>
>> +#include <libfdt.h>
>> +#include <Library/BaseLib.h>
>> +#include <Library/DebugLib.h>
>> +#include <Library/DevicePathLib.h>
>> +#include <Library/HiiLib.h>
>> +#include <Library/UefiBootServicesTableLib.h>
>> +#include <Library/UefiBootServicesTableLib.h>
>> +#include <Library/UefiDriverEntryPoint.h>
>> +#include <Library/UefiLib.h>
>> +#include <Library/UefiRuntimeServicesTableLib.h>
>> +
>> +#include <Protocol/AcpiTable.h>
>> +#include <Protocol/AcpiSystemDescriptionTable.h>
>> +
>> +#include "ConsolePrefDxe.h"
>> +
>> +#define SPCR_SIG    
>> EFI_ACPI_2_0_SERIAL_PORT_CONSOLE_REDIRECTION_TABLE_SIGNATURE
>> +
>> +extern  UINT8                     ConsolePrefHiiBin[];
>> +extern  UINT8                     ConsolePrefDxeStrings[];
>> +
>> +typedef struct {
>> +  VENDOR_DEVICE_PATH              VendorDevicePath;
>> +  EFI_DEVICE_PATH_PROTOCOL        End;
>> +} HII_VENDOR_DEVICE_PATH;
>> +
>> +STATIC HII_VENDOR_DEVICE_PATH     mConsolePrefDxeVendorDevicePath = {
>> +  {
>> +    {
>> +      HARDWARE_DEVICE_PATH,
>> +      HW_VENDOR_DP,
>> +      {
>> +        (UINT8) (sizeof (VENDOR_DEVICE_PATH)),
>> +        (UINT8) ((sizeof (VENDOR_DEVICE_PATH)) >> 8)
>> +      }
>> +    },
>> +    CONSOLE_PREF_FORMSET_GUID
>> +  },
>> +  {
>> +    END_DEVICE_PATH_TYPE,
>> +    END_ENTIRE_DEVICE_PATH_SUBTYPE,
>> +    {
>> +      (UINT8) (END_DEVICE_PATH_LENGTH),
>> +      (UINT8) ((END_DEVICE_PATH_LENGTH) >> 8)
>> +    }
>> +  }
>> +};
>> +
>> +STATIC EFI_EVENT                  mReadyToBootEvent;
>> +
>> +STATIC
>> +EFI_STATUS
>> +InstallHiiPages (
>> +  VOID
>> +  )
>> +{
>> +  EFI_STATUS                      Status;
>> +  EFI_HII_HANDLE                  HiiHandle;
>> +  EFI_HANDLE                      DriverHandle;
>> +
>> +  DriverHandle = NULL;
>> +  Status = gBS->InstallMultipleProtocolInterfaces (&DriverHandle,
>> +                  &gEfiDevicePathProtocolGuid,
>> +                  &mConsolePrefDxeVendorDevicePath,
>> +                  NULL);
>> +  if (EFI_ERROR (Status)) {
>> +    return Status;
>> +  }
>> +
>> +  HiiHandle = HiiAddPackages (&gConsolePrefFormSetGuid,
>> +                              DriverHandle,
>> +                              ConsolePrefDxeStrings,
>> +                              ConsolePrefHiiBin,
>> +                              NULL);
>> +
>> +  if (HiiHandle == NULL) {
>> +    gBS->UninstallMultipleProtocolInterfaces (DriverHandle,
>> +           &gEfiDevicePathProtocolGuid,
>> +           &mConsolePrefDxeVendorDevicePath,
>> +           NULL);
>> +    return EFI_OUT_OF_RESOURCES;
>> +  }
>> +  return EFI_SUCCESS;
>> +}
>> +
>> +STATIC
>> +VOID
>> +RemoveDtStdoutPath (
>> +  VOID
>> +)
>> +{
>> +  VOID        *Dtb;
>> +  INT32       Node;
>> +  INT32       Error;
>> +  EFI_STATUS  Status;
>> +
>> +  Status = EfiGetSystemConfigurationTable (&gFdtTableGuid, &Dtb);
>> +  if (EFI_ERROR (Status)) {
>> +    DEBUG ((DEBUG_INFO, "%a: could not retrieve DT blob - %r\n", 
>> __FUNCTION__,
>> +      Status));
>> +    return;
>> +  }
>> +
>> +  Node = fdt_path_offset (Dtb, "/chosen");
>> +  if (Node < 0) {
>> +    return;
>> +  }
>> +
>> +  Error = fdt_delprop (Dtb, Node, "stdout-path");
>> +  if (Error) {
>> +    DEBUG ((DEBUG_INFO, "%a: Failed to delete 'stdout-path' property: %a\n",
>> +      __FUNCTION__, fdt_strerror (Error)));
>> +  }
>> +}
>> +
>> +STATIC
>> +VOID
>> +RemoveSpcrTable (
>> +  VOID
>> +  )
>> +{
>> +  EFI_ACPI_SDT_PROTOCOL           *Sdt;
>> +  EFI_ACPI_TABLE_PROTOCOL         *AcpiTable;
>> +  EFI_STATUS                      Status;
>> +  UINTN                           TableIndex;
>> +  EFI_ACPI_SDT_HEADER             *TableHeader;
>> +  EFI_ACPI_TABLE_VERSION          TableVersion;
>> +  UINTN                           TableKey;
>> +
>> +  Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL,
>> +                  (VOID **)&AcpiTable);
>> +  if (EFI_ERROR (Status)) {
>> +    return;
>> +  }
>> +
>> +  Status = gBS->LocateProtocol (&gEfiAcpiSdtProtocolGuid, NULL, (VOID 
>> **)&Sdt);
>> +  if (EFI_ERROR (Status)) {
>> +    return;
>> +  }
>> +
>> +  TableIndex  = 0;
>> +  TableKey    = 0;
>> +  TableHeader = NULL;
>> +
>> +  do {
>> +    Status = Sdt->GetAcpiTable (TableIndex++, &TableHeader, &TableVersion,
>> +                    &TableKey);
>> +    if (EFI_ERROR (Status)) {
>> +      break;
>> +    }
>> +
>> +    if (TableHeader->Signature != SPCR_SIG) {
>> +      continue;
>> +    }
>> +
>> +    Status = AcpiTable->UninstallAcpiTable (AcpiTable, TableKey);
>> +    if (EFI_ERROR (Status)) {
>> +      DEBUG ((DEBUG_WARN, "%a: failed to uninstall SPCR table - %r\n",
>> +        __FUNCTION__, Status));
>> +    }
>> +    break;
>> +  } while (TRUE);
>> +}
>> +
>> +STATIC
>> +VOID
>> +OnReadyToBoot (
>> +  IN EFI_EVENT  Event,
>> +  IN VOID       *Context
>> +  )
>> +{
>> +  CONSOLE_PREF_VARSTORE_DATA      ConsolePref;
>> +  UINTN                           BufferSize;
>> +  EFI_STATUS                      Status;
>> +  VOID                            *Gop;
>> +
>> +  BufferSize = sizeof (ConsolePref);
>> +  Status = gRT->GetVariable (CONSOLE_PREF_VARIABLE_NAME,
>> +                  &gConsolePrefFormSetGuid, NULL, &BufferSize, 
>> &ConsolePref);
>> +  if (EFI_ERROR (Status)) {
>> +    DEBUG ((DEBUG_ERROR,
>> +      "%a: variable '%s' could not be read - bailing!\n", __FUNCTION__,
>> +      CONSOLE_PREF_VARIABLE_NAME));
>> +    return;
>> +  }
>> +
>> +  if (ConsolePref.Console == CONSOLE_PREF_SERIAL) {
>> +    DEBUG ((DEBUG_INFO,
>> +      "%a: serial console preferred - doing nothing\n", __FUNCTION__));
>> +    return;
>> +  }
>> +
>> +  //
>> +  // Check if any GOP instances exist: if so, disable stdout-path and SPCR
>> +  //
>> +  Status = gBS->LocateProtocol (&gEfiGraphicsOutputProtocolGuid, NULL, 
>> &Gop);
>> +  if (EFI_ERROR (Status)) {
>> +    DEBUG ((DEBUG_INFO,
>> +      "%a: no GOP instances found - doing nothing (%r)\n", __FUNCTION__,
>> +      Status));
>> +    return;
>> +  }
>> +
>> +  RemoveDtStdoutPath ();
>> +  RemoveSpcrTable ();
>> +}
>> +
>> +/**
>> +  The entry point for ConsolePrefDxe driver.
>> +
>> +  @param[in] ImageHandle     The image handle of the driver.
>> +  @param[in] SystemTable     The system table.
>> +
>> +  @retval EFI_ALREADY_STARTED     The driver already exists in system.
>> +  @retval EFI_OUT_OF_RESOURCES    Fail to execute entry point due to lack of
>> +                                  resources.
>> +  @retval EFI_SUCCES              All the related protocols are installed on
>> +                                  the driver.
>> +
>> +**/
>> +EFI_STATUS
>> +EFIAPI
>> +ConsolePrefDxeEntryPoint (
>> +  IN EFI_HANDLE                   ImageHandle,
>> +  IN EFI_SYSTEM_TABLE             *SystemTable
>> +  )
>> +{
>> +  EFI_STATUS                      Status;
>> +  CONSOLE_PREF_VARSTORE_DATA      ConsolePref;
>> +  UINTN                           BufferSize;
>> +
>> +  //
>> +  // Get the current console preference from the ConsolePref variable.
>> +  //
>> +  BufferSize = sizeof (ConsolePref);
>> +  Status = gRT->GetVariable (CONSOLE_PREF_VARIABLE_NAME,
>> +                  &gConsolePrefFormSetGuid, NULL, &BufferSize, 
>> &ConsolePref);
>> +  if (EFI_ERROR (Status)) {
>> +    DEBUG ((DEBUG_INFO,
>> +      "%a: no console preference found, defaulting to graphical\n",
>> +      __FUNCTION__));
>> +    ConsolePref.Console = CONSOLE_PREF_GRAPHICAL;
>> +  }
>> +
>> +  if (!EFI_ERROR (Status) &&
>> +      ConsolePref.Console != CONSOLE_PREF_GRAPHICAL &&
>> +      ConsolePref.Console != CONSOLE_PREF_SERIAL) {
>> +    DEBUG ((DEBUG_WARN, "%a: invalid value for %s, defaulting to 
>> graphical\n",
>> +      __FUNCTION__, CONSOLE_PREF_VARIABLE_NAME));
>> +    ConsolePref.Console = CONSOLE_PREF_GRAPHICAL;
>> +    Status = EFI_INVALID_PARAMETER; // trigger setvar below
>> +  }
>> +
>> +  //
>> +  // Write the newly selected value back to the variable store.
>> +  //
>> +  if (EFI_ERROR (Status)) {
>> +    ZeroMem (&ConsolePref.Reserved, sizeof (ConsolePref.Reserved));
>> +    Status = gRT->SetVariable (CONSOLE_PREF_VARIABLE_NAME,
>> +                    &gConsolePrefFormSetGuid,
>> +                    EFI_VARIABLE_NON_VOLATILE | 
>> EFI_VARIABLE_BOOTSERVICE_ACCESS,
>> +                    sizeof (ConsolePref), &ConsolePref);
>> +
>> +    if (EFI_ERROR (Status)) {
>> +      DEBUG ((DEBUG_ERROR, "%a: gRT->SetVariable () failed - %r\n",
>> +        __FUNCTION__, Status));
>> +      return Status;
>> +    }
>> +  }
>> +
>> +  Status = gBS->CreateEventEx (EVT_NOTIFY_SIGNAL, TPL_CALLBACK,
>> +                  OnReadyToBoot, NULL, &gEfiEventReadyToBootGuid,
>> +                  &mReadyToBootEvent);
>> +  ASSERT_EFI_ERROR (Status);
>> +
>> +  return InstallHiiPages ();
>> +}
>> diff --git a/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.h 
>> b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.h
>> new file mode 100644
>> index 000000000000..8315e739d3b3
>> --- /dev/null
>> +++ b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.h
>> @@ -0,0 +1,31 @@
>> +/** @file
>> +*
>> +*  Copyright (c) 2017, Linaro Limited. All rights reserved.
>> +*
>> +*  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.
>> +*
>> +**/
>> +
>> +#ifndef __CONSOLE_PREF_DXE_H__
>> +#define __CONSOLE_PREF_DXE_H__
>> +
>> +#include <Guid/HiiPlatformSetupFormset.h>
>> +#include <Guid/ConsolePrefFormSet.h>
>> +
>> +#define CONSOLE_PREF_GRAPHICAL      0x0
>> +#define CONSOLE_PREF_SERIAL         0x1
>> +
>> +#define CONSOLE_PREF_VARIABLE_NAME  L"ConsolePref"
>> +
>> +typedef struct {
>> +  UINT8         Console;
>> +  UINT8         Reserved[3];
>> +} CONSOLE_PREF_VARSTORE_DATA;
>> +
>> +#endif
>> diff --git a/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.inf 
>> b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.inf
>> new file mode 100644
>> index 000000000000..d8b412b9200a
>> --- /dev/null
>> +++ b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefDxe.inf
>> @@ -0,0 +1,62 @@
>> +## @file
>> +#
>> +#  Copyright (c) 2017, Linaro, Ltd. 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               = 0x00010019
>> +  BASE_NAME                 = ConsolePrefDxe
>> +  FILE_GUID                 = bbe2668c-0efc-46fb-9137-4f2da8f419f3
>> +  MODULE_TYPE               = DXE_DRIVER
>> +  VERSION_STRING            = 1.0
>> +  ENTRY_POINT               = ConsolePrefDxeEntryPoint
>> +
>> +#
>> +# The following information is for reference only and not required by the 
>> build tools.
>> +#
>> +#  VALID_ARCHITECTURES      = IA32 X64 ARM AARCH64
>> +#
>> +
>> +[Sources]
>> +  ConsolePrefDxe.c
>> +  ConsolePrefHii.vfr
>> +  ConsolePrefHii.uni
>> +
>> +[Packages]
>> +  EmbeddedPkg/EmbeddedPkg.dec
>> +  MdePkg/MdePkg.dec
>> +  MdeModulePkg/MdeModulePkg.dec
>> +
>> +[LibraryClasses]
>> +  BaseLib
>> +  DebugLib
>> +  FdtLib
>> +  HiiLib
>> +  UefiBootServicesTableLib
>> +  UefiDriverEntryPoint
>> +  UefiLib
>> +  UefiRuntimeServicesTableLib
>> +
>> +[Guids]
>> +  gConsolePrefFormSetGuid
>> +  gFdtTableGuid
>> +  gEfiEventReadyToBootGuid
>> +
>> +[Protocols]
>> +  gEfiAcpiTableProtocolGuid
>> +  gEfiAcpiSdtProtocolGuid
>> +  gEfiGraphicsOutputProtocolGuid
>> +
>> +[Depex]
>> +  gEfiVariableArchProtocolGuid        AND
>> +  gEfiVariableWriteArchProtocolGuid
>> diff --git a/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.uni 
>> b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.uni
>> new file mode 100644
>> index 000000000000..947cf70a4849
>> --- /dev/null
>> +++ b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.uni
>> @@ -0,0 +1,27 @@
>> +/** @file
>> +*
>> +*  Copyright (c) 2017, Linaro, Ltd. All rights reserved.
>> +*
>> +*  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.
>> +*
>> +**/
>> +
>> +#langdef en-US  "English"
>> +
>> +#string STR_FORM_SET_TITLE             #language en-US "Console Preference 
>> Selection"
>> +#string STR_FORM_SET_TITLE_HELP        #language en-US "Press <Enter> to 
>> choose between graphical and serial console."
>> +
>> +#string STR_MAIN_FORM_TITLE            #language en-US "Console Preference 
>> Selection"
>> +#string STR_NULL_STRING                #language en-US ""
>> +
>> +#string STR_CONSOLE_PREF_SELECT_PROMPT #language en-US "Preferred console"
>> +#string STR_CONSOLE_PREF_SELECT_HELP   #language en-US "Select the 
>> preferred console if both graphical and serial are available."
>> +
>> +#string STR_CONSOLE_PREF_GRAPHICAL     #language en-US "Graphical"
>> +#string STR_CONSOLE_PREF_SERIAL        #language en-US "Serial"
>> diff --git a/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.vfr 
>> b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.vfr
>> new file mode 100644
>> index 000000000000..a1e603abf0ce
>> --- /dev/null
>> +++ b/EmbeddedPkg/Drivers/ConsolePrefDxe/ConsolePrefHii.vfr
>> @@ -0,0 +1,51 @@
>> +/** @file
>> +*
>> +*  Copyright (c) 2017, Linaro, Ltd. All rights reserved.
>> +*
>> +*  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 "ConsolePrefDxe.h"
>> +
>> +//
>> +// EFI Variable attributes
>> +//
>> +#define EFI_VARIABLE_NON_VOLATILE       0x00000001
>> +#define EFI_VARIABLE_BOOTSERVICE_ACCESS 0x00000002
>> +#define EFI_VARIABLE_RUNTIME_ACCESS     0x00000004
>> +#define EFI_VARIABLE_READ_ONLY          0x00000008
>> +
>> +formset
>> +  guid      = CONSOLE_PREF_FORMSET_GUID,
>> +  title     = STRING_TOKEN(STR_FORM_SET_TITLE),
>> +  help      = STRING_TOKEN(STR_FORM_SET_TITLE_HELP),
>> +  classguid = EFI_HII_PLATFORM_SETUP_FORMSET_GUID,
>> +
>> +  efivarstore CONSOLE_PREF_VARSTORE_DATA,
>> +    attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS | 
>> EFI_VARIABLE_NON_VOLATILE,  // EFI variable attributes
>> +    name  = ConsolePref,
>> +    guid  = CONSOLE_PREF_FORMSET_GUID;
>> +
>> +  form formid = 0x1000,
>> +    title  = STRING_TOKEN(STR_MAIN_FORM_TITLE);
>> +
>> +    oneof varid = ConsolePref.Console,
>> +        prompt      = STRING_TOKEN(STR_CONSOLE_PREF_SELECT_PROMPT),
>> +        help        = STRING_TOKEN(STR_CONSOLE_PREF_SELECT_HELP),
>> +        flags       = NUMERIC_SIZE_1 | INTERACTIVE,
>> +        option text = STRING_TOKEN(STR_CONSOLE_PREF_GRAPHICAL), value = 
>> CONSOLE_PREF_GRAPHICAL, flags = DEFAULT;
>> +        option text = STRING_TOKEN(STR_CONSOLE_PREF_SERIAL), value = 
>> CONSOLE_PREF_SERIAL, flags = 0;
>> +    endoneof;
>> +
>> +    subtitle text = STRING_TOKEN(STR_NULL_STRING);
>> +
>> +  endform;
>> +
>> +endformset;
>> diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec
>> index 151b1d503dee..52482af13aeb 100644
>> --- a/EmbeddedPkg/EmbeddedPkg.dec
>> +++ b/EmbeddedPkg/EmbeddedPkg.dec
>> @@ -67,6 +67,9 @@ [Guids.common]
>>    # File GUID for default DTB image embedded in the firmware volume
>>    gDtPlatformDefaultDtbFileGuid = { 0x25462cda, 0x221f, 0x47df, { 0xac, 
>> 0x1d, 0x25, 0x9c, 0xfa, 0xa4, 0xe3, 0x26 } }
>>
>> +  # HII form set GUID for ConsolePrefDxe driver
>> +  gConsolePrefFormSetGuid = { 0x2d2358b4, 0xe96c, 0x484d, { 0xb2, 0xdd, 
>> 0x7c, 0x2e, 0xdf, 0xc7, 0xd5, 0x6f } }
>> +
>>  [Protocols.common]
>>    gHardwareInterruptProtocolGuid =  { 0x2890B3EA, 0x053D, 0x1643, { 0xAD, 
>> 0x0C, 0xD6, 0x48, 0x08, 0xDA, 0x3F, 0xF1 } }
>>    gHardwareInterrupt2ProtocolGuid = { 0x32898322, 0x2da1, 0x474a, { 0xba, 
>> 0xaa, 0xf3, 0xf7, 0xcf, 0x56, 0x94, 0x70 } }
>> diff --git a/EmbeddedPkg/Include/Guid/ConsolePrefFormSet.h 
>> b/EmbeddedPkg/Include/Guid/ConsolePrefFormSet.h
>> new file mode 100644
>> index 000000000000..f3cca1d15dfa
>> --- /dev/null
>> +++ b/EmbeddedPkg/Include/Guid/ConsolePrefFormSet.h
>> @@ -0,0 +1,23 @@
>> +/** @file
>> +*
>> +*  Copyright (c) 2017, Linaro Limited. All rights reserved.
>> +*
>> +*  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.
>> +*
>> +**/
>> +
>> +#ifndef __CONSOLE_PREF_FORMSET_H__
>> +#define __CONSOLE_PREF_FORMSET_H__
>> +
>> +#define CONSOLE_PREF_FORMSET_GUID  \
>> +  { 0x2d2358b4, 0xe96c, 0x484d, { 0xb2, 0xdd, 0x7c, 0x2e, 0xdf, 0xc7, 0xd5, 
>> 0x6f } }
>> +
>> +extern EFI_GUID gConsolePrefFormSetGuid;
>> +
>> +#endif
>> --
>> 2.11.0
>>
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