diff options
Diffstat (limited to 'MdePkg/Library/MmServicesTableLib')
3 files changed, 115 insertions, 0 deletions
diff --git a/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.c b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.c new file mode 100644 index 000000000000..a603754f1ecd --- /dev/null +++ b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.c @@ -0,0 +1,57 @@ +/** @file + MM Services Table Library. + + Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR> + Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR> + SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include <PiMm.h> +#include <Protocol/MmBase.h> +#include <Library/MmServicesTableLib.h> +#include <Library/DebugLib.h> + +EFI_MM_SYSTEM_TABLE *gMmst = NULL; + +/** + The constructor function caches the pointer of the MM Services Table. + + @param ImageHandle The firmware allocated handle for the EFI image. + @param SystemTable A pointer to the EFI System Table. + + @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS. + +**/ +EFI_STATUS +EFIAPI +MmServicesTableLibConstructor ( + IN EFI_HANDLE ImageHandle, + IN EFI_SYSTEM_TABLE *SystemTable + ) +{ + EFI_STATUS Status; + EFI_MM_BASE_PROTOCOL *InternalMmBase; + + InternalMmBase = NULL; + // + // Retrieve MM Base Protocol, Do not use gBS from UefiBootServicesTableLib on purpose + // to prevent inclusion of gBS, gST, and gImageHandle from SMM Drivers unless the + // MM driver explicity declares that dependency. + // + Status = SystemTable->BootServices->LocateProtocol ( + &gEfiMmBaseProtocolGuid, + NULL, + (VOID **)&InternalMmBase + ); + ASSERT_EFI_ERROR (Status); + ASSERT (InternalMmBase != NULL); + + // + // We are in MM, retrieve the pointer to MM System Table + // + InternalMmBase->GetMmstLocation (InternalMmBase, &gMmst); + ASSERT (gMmst != NULL); + + return EFI_SUCCESS; +} diff --git a/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.inf b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.inf new file mode 100644 index 000000000000..5a36f95ffb9b --- /dev/null +++ b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.inf @@ -0,0 +1,40 @@ +## @file +# MM Services Table Library. +# +# Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR> +# Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR> +# +# SPDX-License-Identifier: BSD-2-Clause-Patent +# +# +## + +[Defines] + INF_VERSION = 0x0001001B + BASE_NAME = MmServicesTableLib + MODULE_UNI_FILE = MmServicesTableLib.uni + FILE_GUID = 9508ECFD-66D1-4B4C-9415-F25F0FFF9E93 + MODULE_TYPE = DXE_SMM_DRIVER + VERSION_STRING = 1.0 + LIBRARY_CLASS = MmServicesTableLib|DXE_SMM_DRIVER + PI_SPECIFICATION_VERSION = 0x00010032 + CONSTRUCTOR = MmServicesTableLibConstructor + +# +# VALID_ARCHITECTURES = IA32 X64 ARM AARCH64 +# + +[Sources] + MmServicesTableLib.c + +[Packages] + MdePkg/MdePkg.dec + +[LibraryClasses] + DebugLib + +[Protocols] + gEfiMmBaseProtocolGuid ## CONSUMES + +[Depex] + gEfiMmBaseProtocolGuid diff --git a/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.uni b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.uni new file mode 100644 index 000000000000..3b836a546de3 --- /dev/null +++ b/MdePkg/Library/MmServicesTableLib/MmServicesTableLib.uni @@ -0,0 +1,18 @@ +// /** @file +// +// MM Services Table Library. +// +// It implements MmServicesTableLib based on gEfiMmBaseProtocolGuid, which +// is simply gEfiSmmBase2ProtocolGuid under the hood. +// +// Copyright (c) 2009 - 2014, Intel Corporation. All rights reserved.<BR> +// Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR> +// +// SPDX-License-Identifier: BSD-2-Clause-Patent +// +// **/ + + +#string STR_MODULE_ABSTRACT #language en-US "MM Services Table Library" + +#string STR_MODULE_DESCRIPTION #language en-US "MM Services Table Library." |