MdeModulePkg/DxeCapsuleLibFmp: Use new Variable Lock interface

[mirror_edk2.git] / ArmVirtPkg / CloudHvPlatformHasAcpiDtDxe / CloudHvHasAcpiDtDxe.c

/** @file\r
  Decide whether the firmware should expose an ACPI- and/or a Device Tree-based\r
  hardware description to the operating system.\r
\r
  Copyright (c) 2021, Arm Limited. All rights reserved.<BR>\r
\r
  SPDX-License-Identifier: BSD-2-Clause-Patent\r
**/\r
\r
#include <Guid/PlatformHasAcpi.h>\r
#include <Guid/PlatformHasDeviceTree.h>\r
#include <Library/BaseLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
\r
/** Entry point for the Cloud Hypervisor PlatformHasAcpiDtDxe.\r
\r
  @param [in]  ImageHandle  Handle for this image.\r
  @param [in]  SystemTable  Pointer to the EFI system table.\r
\r
  @return EFI_SUCCESS             If ACPI or Device Tree based hardware\r
                                  description protocol was installed.\r
  @return EFI_INVALID_PARAMETER   A parameter was invalid.\r
  @return EFI_OUT_OF_RESOURCES    Insufficient resources exist to complete\r
                                  the request.\r
**/\r
EFI_STATUS\r
EFIAPI\r
PlatformHasAcpiDt (\r
  IN EFI_HANDLE       ImageHandle,\r
  IN EFI_SYSTEM_TABLE *SystemTable\r
  )\r
{\r
  EFI_STATUS           Status;\r
\r
  //\r
  // If we fail to install any of the necessary protocols below, the OS will be\r
  // unbootable anyway (due to lacking hardware description), so tolerate no\r
  // errors here.\r
  //\r
  if (MAX_UINTN == MAX_UINT64 &&\r
      !PcdGetBool (PcdForceNoAcpi)) {\r
    Status = gBS->InstallProtocolInterface (\r
                    &ImageHandle,\r
                    &gEdkiiPlatformHasAcpiGuid,\r
                    EFI_NATIVE_INTERFACE,\r
                    NULL\r
                    );\r
    if (EFI_ERROR (Status)) {\r
      goto Failed;\r
    }\r
\r
    return Status;\r
  }\r
\r
  //\r
  // Expose the Device Tree otherwise.\r
  //\r
  Status = gBS->InstallProtocolInterface (\r
                  &ImageHandle,\r
                  &gEdkiiPlatformHasDeviceTreeGuid,\r
                  EFI_NATIVE_INTERFACE,\r
                  NULL\r
                  );\r
  if (EFI_ERROR (Status)) {\r
    goto Failed;\r
  }\r
\r
  return Status;\r
\r
Failed:\r
  ASSERT_EFI_ERROR (Status);\r
  CpuDeadLoop ();\r
  //\r
  // Keep compilers happy.\r
  //\r
  return Status;\r
}\r