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EmbeddedPkg: add DT platform driver to select between DT and ACPI

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As a follow up to the changes proposed by Laszlo to make ACPI and DT
mutually exclusive on ArmVirtQemu, this patch proposes a DT platform
DXE driver that either installs the NULL protocol PlatformHasAcpiGuid,
or installs the FV embedded DTB binary as a configuration table under
the appropriate GUID, depending on a preference setting recorded as
a UEFI variable, and configurable via a HII screen.

The DTB binary can be embedded in the firmware image by adding the
following to the platform .fdf file:

  FILE FREEFORM = 25462CDA-221F-47DF-AC1D-259CFAA4E326 {
    SECTION RAW = SomePkg/path/to/foo.dtb
  }

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Ard Biesheuvel
2017-03-27 10:57:31 +01:00
parent 89ad870fbf
commit 779cc439e8
8 changed files with 432 additions and 0 deletions
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51
EmbeddedPkg/Drivers/DtPlatformDxe/DtPlatformHii.vfr Normal file
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/** @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 "DtPlatformDxe.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 = DT_PLATFORM_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 DT_ACPI_VARSTORE_DATA,
attribute = EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_NON_VOLATILE, // EFI variable attributes
name = DtAcpiPref,
guid = DT_PLATFORM_FORMSET_GUID;
form formid = 0x1000,
title = STRING_TOKEN(STR_MAIN_FORM_TITLE);
oneof varid = DtAcpiPref.Pref,
prompt = STRING_TOKEN(STR_DT_ACPI_SELECT_PROMPT),
help = STRING_TOKEN(STR_DT_ACPI_SELECT_HELP),
flags = NUMERIC_SIZE_1 | INTERACTIVE | RESET_REQUIRED,
option text = STRING_TOKEN(STR_DT_ACPI_SELECT_DT), value = DT_ACPI_SELECT_DT, flags = DEFAULT;
option text = STRING_TOKEN(STR_DT_ACPI_SELECT_ACPI), value = DT_ACPI_SELECT_ACPI, flags = 0;
endoneof;
subtitle text = STRING_TOKEN(STR_NULL_STRING);
endform;
endformset;