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ArmVirtPkg: add XenPlatformHasAcpiDtDxe 

This driver produces the EDKII Platform Has ACPI and Platform Has Device
Tree protocols, exactly matching the current ACPI / DT exposure on Xen,
according to ARM vs. AARCH64. At this point it differs from the QEMU
driver PlatformHasAcpiDtDxe in that this one always installs the DT.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
This commit is contained in:
Laszlo Ersek 2017-03-17 15:12:28 +01:00
parent 2558bfe3e9
commit a614183440
2 changed files with 114 additions and 0 deletions
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72
ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.c Normal file
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/** @file
Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
hardware description to the operating system.
Copyright (c) 2017, Red Hat, Inc.
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 <Guid/PlatformHasAcpi.h>
#include <Guid/PlatformHasDeviceTree.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiBootServicesTableLib.h>
EFI_STATUS
EFIAPI
XenPlatformHasAcpiDt (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
EFI_STATUS Status;
//
// If we fail to install any of the necessary protocols below, the OS will be
// unbootable anyway (due to lacking hardware description), so tolerate no
// errors here.
//
// Always make ACPI available on 64-bit systems.
//
if (MAX_UINTN == MAX_UINT64) {
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasAcpiGuid,
EFI_NATIVE_INTERFACE,
NULL
);
if (EFI_ERROR (Status)) {
goto Failed;
}
}
//
// Expose the Device Tree unconditionally.
//
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEdkiiPlatformHasDeviceTreeGuid,
EFI_NATIVE_INTERFACE,
NULL
);
if (EFI_ERROR (Status)) {
goto Failed;
}
return Status;
Failed:
ASSERT_EFI_ERROR (Status);
CpuDeadLoop ();
//
// Keep compilers happy.
//
return Status;
}

42
ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.inf Normal file
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## @file
# Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
# hardware description to the operating system.
#
# Copyright (c) 2017, Red Hat, Inc.
#
# 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 = 1.25
BASE_NAME = XenPlatformHasAcpiDtDxe
FILE_GUID = 6914c46f-d46e-48dc-9998-8a5f64f02553
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
ENTRY_POINT = XenPlatformHasAcpiDt
[Sources]
XenPlatformHasAcpiDtDxe.c
[Packages]
EmbeddedPkg/EmbeddedPkg.dec
MdePkg/MdePkg.dec
[LibraryClasses]
BaseLib
DebugLib
UefiBootServicesTableLib
UefiDriverEntryPoint
[Guids]
gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL
gEdkiiPlatformHasDeviceTreeGuid ## PRODUCES ## PROTOCOL
[Depex]
TRUE