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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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27
EmbeddedPkg/Drivers/DtPlatformDxe/DtPlatformHii.uni 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.
*
**/
#langdef en-US "English"
#string STR_FORM_SET_TITLE #language en-US "O/S Hardware Description Selection"
#string STR_FORM_SET_TITLE_HELP #language en-US "Press <Enter> to choose between ACPI and DT hardware descriptions."
#string STR_MAIN_FORM_TITLE #language en-US "O/S Hardware Description Selection"
#string STR_NULL_STRING #language en-US ""
#string STR_DT_ACPI_SELECT_PROMPT #language en-US "O/S Hardware Description"
#string STR_DT_ACPI_SELECT_HELP #language en-US "Select the hardware description that will be exposed to the O/S."
#string STR_DT_ACPI_SELECT_DT #language en-US "Device Tree"
#string STR_DT_ACPI_SELECT_ACPI #language en-US "ACPI"