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| author | Laszlo Ersek <lersek@redhat.com> | 2017-03-17 15:12:28 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2017-03-28 14:13:25 +0200 |
| commit | 2558bfe3e907c6607991b50300cba9eeb04e6f43 (patch) | |
| tree | 653a44f4e8208abae0be7ebefb95339303586041 /ArmVirtPkg/PlatformHasAcpiDtDxe | |
| parent | 65a69b21484056794165e5a884e3142120ad61fc (diff) | |
| download | edk2-2558bfe3e907c6607991b50300cba9eeb04e6f43.tar.gz edk2-2558bfe3e907c6607991b50300cba9eeb04e6f43.tar.bz2 edk2-2558bfe3e907c6607991b50300cba9eeb04e6f43.zip | |
ArmVirtPkg: add PlatformHasAcpiDtDxe
This driver produces the EDKII Platform Has ACPI and Platform Has Device
Tree protocols, exactly matching the current ACPI / DT exposure on QEMU,
according to ARM vs. AARCH64, and (in the latter case) to PcdPureAcpiBoot.
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>
Diffstat (limited to 'ArmVirtPkg/PlatformHasAcpiDtDxe')
| -rw-r--r-- | ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.c | 77 | ||||
| -rw-r--r-- | ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.inf | 47 |
2 files changed, 124 insertions, 0 deletions
diff --git a/ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.c b/ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.c new file mode 100644 index 0000000000..a718ce1b5a --- /dev/null +++ b/ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.c @@ -0,0 +1,77 @@ +/** @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/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+EFI_STATUS
+EFIAPI
+PlatformHasAcpiDt (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+
+ Status = EFI_SUCCESS;
+
+ //
+ // 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 unless PcdPureAcpiBoot is set.
+ //
+ if (!FeaturePcdGet (PcdPureAcpiBoot)) {
+ 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/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.inf b/ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.inf new file mode 100644 index 0000000000..2450500b3f --- /dev/null +++ b/ArmVirtPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.inf @@ -0,0 +1,47 @@ +## @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 = PlatformHasAcpiDtDxe
+ FILE_GUID = 9d1dd27f-6d7f-427b-aec4-b62f6279c2f1
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = PlatformHasAcpiDt
+
+[Sources]
+ PlatformHasAcpiDtDxe.c
+
+[Packages]
+ ArmVirtPkg/ArmVirtPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ PcdLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+
+[Guids]
+ gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL
+ gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL
+
+[FeaturePcd]
+ gArmVirtTokenSpaceGuid.PcdPureAcpiBoot ## CONSUMES
+
+[Depex]
+ TRUE
|