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31fcee6d99
The ArmVirtPkg\PlatformHasAcpiDtDxe implementation is not common and is specific for Qemu. So add a Cloud Hypervisor specific version that decides whether the firmware should expose an ACPI based or a Device Tree based hardware description to an operating system. Cc: Laszlo Ersek <lersek@redhat.com> Cc: Sami Mujawar <sami.mujawar@arm.com> Signed-off-by: Jianyong Wu <jianyong.wu@arm.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>
80 lines
2.1 KiB
C
80 lines
2.1 KiB
C
/** @file
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Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
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hardware description to the operating system.
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Copyright (c) 2021, Arm Limited. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Guid/PlatformHasAcpi.h>
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#include <Guid/PlatformHasDeviceTree.h>
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#include <Library/BaseLib.h>
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#include <Library/DebugLib.h>
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#include <Library/PcdLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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/** Entry point for the Cloud Hypervisor PlatformHasAcpiDtDxe.
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@param [in] ImageHandle Handle for this image.
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@param [in] SystemTable Pointer to the EFI system table.
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@return EFI_SUCCESS If ACPI or Device Tree based hardware
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description protocol was installed.
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@return EFI_INVALID_PARAMETER A parameter was invalid.
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@return EFI_OUT_OF_RESOURCES Insufficient resources exist to complete
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the request.
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**/
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EFI_STATUS
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EFIAPI
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PlatformHasAcpiDt (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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EFI_STATUS Status;
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//
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// If we fail to install any of the necessary protocols below, the OS will be
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// unbootable anyway (due to lacking hardware description), so tolerate no
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// errors here.
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//
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if (MAX_UINTN == MAX_UINT64 &&
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!PcdGetBool (PcdForceNoAcpi)) {
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Status = gBS->InstallProtocolInterface (
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&ImageHandle,
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&gEdkiiPlatformHasAcpiGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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if (EFI_ERROR (Status)) {
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goto Failed;
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}
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return Status;
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}
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//
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// Expose the Device Tree otherwise.
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//
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Status = gBS->InstallProtocolInterface (
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&ImageHandle,
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&gEdkiiPlatformHasDeviceTreeGuid,
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EFI_NATIVE_INTERFACE,
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NULL
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);
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if (EFI_ERROR (Status)) {
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goto Failed;
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}
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return Status;
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Failed:
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ASSERT_EFI_ERROR (Status);
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CpuDeadLoop ();
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//
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// Keep compilers happy.
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//
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return Status;
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}
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