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63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/** @file
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This library implement library class DxeServiceTableLib.
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It produce EFI_DXE_SERVICE pointer in global variable gDS in library's constructure.
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A DXE driver can use gDS pointer to access services in EFI_DXE_SERVICE, if this
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DXE driver declare that use DxeServicesTableLib library class and link to this
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library instance.
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Please attention this library instance can not be used util EFI_SYSTEM_TABLE was
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initialized.
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This library contains contruct function to retrieve EFI_DXE_SERIVCE, this construct
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function will be invoked in DXE driver's autogen file.
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Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <PiDxe.h>
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#include <Guid/DxeServices.h>
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#include <Library/DxeServicesTableLib.h>
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#include <Library/DebugLib.h>
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#include <Library/UefiLib.h>
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//
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// Cache copy of the DXE Services Table
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//
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EFI_DXE_SERVICES *gDS = NULL;
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/**
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The constructor function caches the pointer of DXE Services Table.
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The constructor function caches the pointer of DXE Services Table.
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It will ASSERT() if that operation fails.
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It will ASSERT() if the pointer of DXE Services Table is NULL.
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It will always return EFI_SUCCESS.
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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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DxeServicesTableLibConstructor (
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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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//
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// Cache copy of the DXE Services Table
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//
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Status = EfiGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **) &gDS);
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ASSERT_EFI_ERROR (Status);
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ASSERT (gDS != NULL);
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return Status;
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}
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