You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
64 lines
2.0 KiB
64 lines
2.0 KiB
/** @file
|
|
MM Services Table Library.
|
|
|
|
Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
|
|
Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php.
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#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;
|
|
}
|