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https://github.com/CloverHackyColor/CloverBootloader.git
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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/** @file
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MM Services Table Library.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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Copyright (c) 2018, Linaro, Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiMm.h>
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#include <Protocol/MmBase.h>
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#include <Library/MmServicesTableLib.h>
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#include <Library/DebugLib.h>
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EFI_MM_SYSTEM_TABLE *gMmst = NULL;
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/**
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The constructor function caches the pointer of the MM Services Table.
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@param ImageHandle The firmware allocated handle for the EFI image.
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@param SystemTable A pointer to the EFI System Table.
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@retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.
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**/
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EFI_STATUS
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EFIAPI
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MmServicesTableLibConstructor (
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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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EFI_MM_BASE_PROTOCOL *InternalMmBase;
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InternalMmBase = NULL;
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//
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// Retrieve MM Base Protocol, Do not use gBS from UefiBootServicesTableLib on purpose
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// to prevent inclusion of gBS, gST, and gImageHandle from SMM Drivers unless the
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// MM driver explicity declares that dependency.
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//
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Status = SystemTable->BootServices->LocateProtocol (
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&gEfiMmBaseProtocolGuid,
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NULL,
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(VOID **)&InternalMmBase
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);
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ASSERT_EFI_ERROR (Status);
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ASSERT (InternalMmBase != NULL);
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//
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// We are in MM, retrieve the pointer to MM System Table
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//
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InternalMmBase->GetMmstLocation (InternalMmBase, &gMmst);
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ASSERT (gMmst != NULL);
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return EFI_SUCCESS;
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}
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