82 lines
2.3 KiB
C
Executable File
82 lines
2.3 KiB
C
Executable File
/** @file
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Copyright (C) 2016, The HermitCrabs Lab. All rights reserved.
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All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include <Uefi.h>
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#include <IndustryStandard/Pci.h>
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#include <Guid/ApplePlatformInfo.h>
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#include <Protocol/LegacyRegion.h>
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#include <Protocol/PciIo.h>
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#include <Library/BaseLib.h>
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#include <Library/BaseMemoryLib.h>
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#include <Library/DebugLib.h>
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#include <Library/MemoryAllocationLib.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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#include <Library/OcMiscLib.h>
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#include <Library/OcStringLib.h>
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#include <Library/UefiBootServicesTableLib.h>
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#include <Library/UefiLib.h>
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/** Lock the legacy region specified to enable modification.
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@param[in] LegacyAddress The address of the region to lock.
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@param[in] LegacyLength The size of the region to lock.
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@retval EFI_SUCCESS The region was locked successfully.
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**/
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EFI_STATUS
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LegacyRegionLock (
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IN UINT32 LegacyAddress,
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IN UINT32 LegacyLength
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)
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{
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EFI_STATUS Status;
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EFI_LEGACY_REGION_PROTOCOL *LegacyRegionProtocol;
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UINT32 Granularity;
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LegacyRegionProtocol = NULL;
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Status = gBS->LocateProtocol (
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&gEfiLegacyRegionProtocolGuid,
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NULL,
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(VOID **) &LegacyRegionProtocol
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);
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if (!EFI_ERROR(Status)) {
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//
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// Lock Region Using LegacyRegionProtocol
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//
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Granularity = 0;
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Status = LegacyRegionProtocol->Lock (
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LegacyRegionProtocol,
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LegacyAddress,
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LegacyLength,
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&Granularity
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);
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DEBUG ((
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DEBUG_INFO,
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"Lock LegacyRegion 0x%0X-0x%0X - %r\n",
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LegacyAddress,
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(LegacyAddress + (LegacyLength - 1)),
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Status
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));
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}
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return Status;
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}
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