From a61418344018036f7fc06ec9bdb4a02121c2d82e Mon Sep 17 00:00:00 2001 From: Laszlo Ersek Date: Fri, 17 Mar 2017 15:12:28 +0100 Subject: [PATCH] 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 Cc: Leif Lindholm Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Laszlo Ersek Reviewed-by: Ard Biesheuvel --- .../XenPlatformHasAcpiDtDxe.c | 72 +++++++++++++++++++ .../XenPlatformHasAcpiDtDxe.inf | 42 +++++++++++ 2 files changed, 114 insertions(+) create mode 100644 ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.c create mode 100644 ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.inf diff --git a/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.c b/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.c new file mode 100644 index 0000000000..596f4ea8dd --- /dev/null +++ b/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.c @@ -0,0 +1,72 @@ +/** @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 +#include +#include +#include +#include + +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; +} diff --git a/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.inf b/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.inf new file mode 100644 index 0000000000..2833075f65 --- /dev/null +++ b/ArmVirtPkg/XenPlatformHasAcpiDtDxe/XenPlatformHasAcpiDtDxe.inf @@ -0,0 +1,42 @@ +## @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 -- 2.39.2