diff --git a/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.c b/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.c new file mode 100644 index 0000000000..a42b64d106 --- /dev/null +++ b/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.c @@ -0,0 +1,82 @@ +/** @file + + The KvmtoolPlatformDxe performs the platform specific initialization like: + - It decides if the firmware should expose ACPI or Device Tree-based + hardware description to the operating system. + + Copyright (c) 2018 - 2020, ARM Limited. All rights reserved. + + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include +#include +#include +#include +#include + +/** Decide if the firmware should expose ACPI tables or Device Tree and + install the appropriate protocol interface. + + Note: This function is derived from "ArmVirtPkg/PlatformHasAcpiDtDxe", + by dropping the word size check, and the fw_cfg check. + + @param [in] ImageHandle Handle for this image. + + @retval EFI_SUCCESS Success. + @retval EFI_OUT_OF_RESOURCES There was not enough memory to install the + protocols. + @retval EFI_INVALID_PARAMETER A parameter is invalid. + +**/ +STATIC +EFI_STATUS +PlatformHasAcpiDt ( + IN EFI_HANDLE ImageHandle + ) +{ + if (!PcdGetBool (PcdForceNoAcpi)) { + // Expose ACPI tables + return gBS->InstallProtocolInterface ( + &ImageHandle, + &gEdkiiPlatformHasAcpiGuid, + EFI_NATIVE_INTERFACE, + NULL + ); + } + + // Expose the Device Tree. + return gBS->InstallProtocolInterface ( + &ImageHandle, + &gEdkiiPlatformHasDeviceTreeGuid, + EFI_NATIVE_INTERFACE, + NULL + ); +} + +/** Entry point for Kvmtool Platform Dxe + + @param [in] ImageHandle Handle for this image. + @param [in] SystemTable Pointer to the EFI system table. + + @retval EFI_SUCCESS Success. + @retval EFI_OUT_OF_RESOURCES There was not enough memory to install the + protocols. + @retval EFI_INVALID_PARAMETER A parameter is invalid. + +**/ +EFI_STATUS +EFIAPI +KvmtoolPlatformDxeEntryPoint ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + + Status = PlatformHasAcpiDt (ImageHandle); + ASSERT_EFI_ERROR (Status); + + return Status; +} diff --git a/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.inf b/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.inf new file mode 100644 index 0000000000..1cf25780f8 --- /dev/null +++ b/ArmVirtPkg/KvmtoolPlatformDxe/KvmtoolPlatformDxe.inf @@ -0,0 +1,43 @@ +## @file +# The KvmtoolPlatformDxe performs the platform specific initialization like: +# - It decides if the firmware should expose ACPI or Device Tree-based +# hardware description to the operating system. +# +# Copyright (c) 2018 - 2020, ARM Limited. All rights reserved. +# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +## + +[Defines] + INF_VERSION = 0x0001001B + BASE_NAME = KvmtoolPlatformDxe + FILE_GUID = 7479CCCD-D721-442A-8C73-A72DBB886669 + MODULE_TYPE = DXE_DRIVER + VERSION_STRING = 1.0 + ENTRY_POINT = KvmtoolPlatformDxeEntryPoint + +[Sources] + KvmtoolPlatformDxe.c + +[Packages] + ArmVirtPkg/ArmVirtPkg.dec + EmbeddedPkg/EmbeddedPkg.dec + MdePkg/MdePkg.dec + MdeModulePkg/MdeModulePkg.dec + +[LibraryClasses] + BaseLib + DebugLib + UefiBootServicesTableLib + UefiDriverEntryPoint + +[Guids] + gEdkiiPlatformHasAcpiGuid ## SOMETIMES_PRODUCES ## PROTOCOL + gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL + +[Pcd] + gArmVirtTokenSpaceGuid.PcdForceNoAcpi + +[Depex] + TRUE