73 lines
2.7 KiB
Plaintext
73 lines
2.7 KiB
Plaintext
/** @file
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Provide OEM to set BIOS region protection before boot to OS.
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;******************************************************************************
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;* Copyright (c) 2014 - 2020, Insyde Software Corporation. All Rights Reserved.
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;*
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;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
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;* transmit, broadcast, present, recite, release, license or otherwise exploit
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;* any part of this publication in any form, by any means, without the prior
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;* written permission of Insyde Software Corporation.
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;*
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;******************************************************************************
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*/
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#include <Library/DxeOemSvcChipsetLib.h>
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/**
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Customize BIOS protect region before boot to OS.
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@param[out] *BiosRegionTable Pointer to BiosRegion Table.
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@param[out] ProtectRegionNum The number of Bios protect region instances.
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@retval EFI_UNSUPPORTED Returns unsupported by default, OEM did not implement this function.
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@retval EFI_MEDIA_CHANGED Provide table for kernel to set protect region and lock flash program registers.
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This table will be freed by kernel.
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**/
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EFI_STATUS
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OemSvcUpdateBiosProtectTable (
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OUT BIOS_PROTECT_REGION **BiosRegionTable,
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OUT UINT8 *ProtectRegionNum
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)
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{
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/*++
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Todo:
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Add project specific code in here.
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--*/
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#if 0 // Sample Implementation
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//
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// When OEM needs to add protect region, this map provides the protected BIOS region.
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// Other, OEM just redefine these PCDs in your projectpkg .dsc file.
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// These protected regions will be locked by BiosProtect Driver and only can be updated by Secure Flash mechanism
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//
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UINT8 BiosProtectRegionNumber;
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FreePool (*BiosRegionTable);
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*BiosRegionTable = NULL;
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BiosProtectRegionNumber = 3;
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if (BiosRegionTable == NULL || ProtectRegionNum == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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*BiosRegionTable = AllocateZeroPool (sizeof (BIOS_PROTECT_REGION) * (BiosProtectRegionNumber));
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if (*BiosRegionTable == NULL) {
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DEBUG ((DEBUG_INFO, "BiosRegionTable allocate memory resource failed.\n"));
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return EFI_OUT_OF_RESOURCES;
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}
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(*BiosRegionTable)[0].Base = PcdGet32 (PcdFlashFvMainBase);
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(*BiosRegionTable)[0].Size = PcdGet32 (PcdFlashFvMainSize);
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(*BiosRegionTable)[1].Base = PcdGet32 (PcdFlashFvRecoveryBase);
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(*BiosRegionTable)[1].Size = PcdGet32 (PcdFlashFvRecoverySize);
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(*BiosRegionTable)[2].Base = PcdGet32 (PcdFlashNvStorageMicrocodeBase);
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(*BiosRegionTable)[2].Size = PcdGet32 (PcdFlashNvStorageMicrocodeSize);
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*ProtectRegionNum = BiosProtectRegionNumber;
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return EFI_MEDIA_CHANGED;
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#endif
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return EFI_UNSUPPORTED;
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}
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