mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
synced 2024-12-27 16:58:09 +01:00
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/** @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;
|
|
}
|