diff options
| -rw-r--r-- | ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.c | 79 | ||||
| -rw-r--r-- | ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.inf | 42 |
2 files changed, 121 insertions, 0 deletions
diff --git a/ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.c b/ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.c new file mode 100644 index 0000000000..4cf1d39df4 --- /dev/null +++ b/ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.c @@ -0,0 +1,79 @@ +/** @file
+ Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
+ hardware description to the operating system.
+
+ Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Guid/PlatformHasAcpi.h>
+#include <Guid/PlatformHasDeviceTree.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+/** Entry point for the Cloud Hypervisor PlatformHasAcpiDtDxe.
+
+ @param [in] ImageHandle Handle for this image.
+ @param [in] SystemTable Pointer to the EFI system table.
+
+ @return EFI_SUCCESS If ACPI or Device Tree based hardware
+ description protocol was installed.
+ @return EFI_INVALID_PARAMETER A parameter was invalid.
+ @return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete
+ the request.
+**/
+EFI_STATUS
+EFIAPI
+PlatformHasAcpiDt (
+ 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.
+ //
+ if (MAX_UINTN == MAX_UINT64 &&
+ !PcdGetBool (PcdForceNoAcpi)) {
+ Status = gBS->InstallProtocolInterface (
+ &ImageHandle,
+ &gEdkiiPlatformHasAcpiGuid,
+ EFI_NATIVE_INTERFACE,
+ NULL
+ );
+ if (EFI_ERROR (Status)) {
+ goto Failed;
+ }
+
+ return Status;
+ }
+
+ //
+ // Expose the Device Tree otherwise.
+ //
+ 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/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.inf b/ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.inf new file mode 100644 index 0000000000..4af06b2a67 --- /dev/null +++ b/ArmVirtPkg/CloudHvPlatformHasAcpiDtDxe/CloudHvHasAcpiDtDxe.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) 2021, Arm Limited. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+ INF_VERSION = 0x0001001B
+ BASE_NAME = CloudHvPlatformHasAcpiDtDxe
+ FILE_GUID = 71fe72f9-6dc1-199d-5054-13b4200ee88d
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = PlatformHasAcpiDt
+
+[Sources]
+ CloudHvHasAcpiDtDxe.c
+
+[Packages]
+ ArmVirtPkg/ArmVirtPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ MdePkg/MdePkg.dec
+
+[LibraryClasses]
+ BaseLib
+ DebugLib
+ PcdLib
+ UefiBootServicesTableLib
+ UefiDriverEntryPoint
+
+[Guids]
+ gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL
+ gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL
+
+[Pcd]
+ gArmVirtTokenSpaceGuid.PcdForceNoAcpi
+
+[Depex]
+ gEfiVariableArchProtocolGuid
|