mirror of https://github.com/acidanthera/audk.git
129 lines
4.5 KiB
C
129 lines
4.5 KiB
C
/** @file
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This protocol manages the legacy memory regions between 0xc0000 - 0xfffff
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Copyright (c) 2007 - 2009, Intel Corporation
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All rights reserved. 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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Module Name: LegacyRegion.h
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@par Revision Reference:
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This protocol is defined in Framework for EFI Compatibility Support Module spec
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Version 0.97.
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**/
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#ifndef _EFI_LEGACY_REGION_H_
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#define _EFI_LEGACY_REGION_H_
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#include <PiDxe.h>
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#define EFI_LEGACY_REGION_PROTOCOL_GUID \
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{ \
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0xfc9013a, 0x568, 0x4ba9, {0x9b, 0x7e, 0xc9, 0xc3, 0x90, 0xa6, 0x60, 0x9b } \
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}
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typedef struct _EFI_LEGACY_REGION_PROTOCOL EFI_LEGACY_REGION_PROTOCOL;
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/**
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Sets hardware to decode or not decode a region.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to decode.
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@param Length Size in bytes of the region.
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@param On Decode/nondecode flag.
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@retval EFI_SUCCESS Decode range successfully changed.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_REGION_DECODE)(
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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IN BOOLEAN *On
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);
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/**
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Sets a region to read only.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was made read only.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_REGION_LOCK)(
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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/**
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Sets a region to read only and ensures that flash is locked from being
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inadvertently modified.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was made read only and flash is locked.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_REGION_BOOT_LOCK)(
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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/**
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Sets a region to read-write.
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@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
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@param Start Start of region to lock.
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@param Length Size in bytes of the region.
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@param Granularity Lock attribute affects this granularity in bytes.
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@retval EFI_SUCCESS The region was successfully made read-write.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *EFI_LEGACY_REGION_UNLOCK)(
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IN EFI_LEGACY_REGION_PROTOCOL *This,
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IN UINT32 Start,
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IN UINT32 Length,
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OUT UINT32 *Granularity OPTIONAL
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);
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/**
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Abstracts the hardware control of the physical address region 0xC0000-C0xFFFFF
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for the traditional BIOS.
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**/
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struct _EFI_LEGACY_REGION_PROTOCOL {
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EFI_LEGACY_REGION_DECODE Decode; ///< Specifies a region for the chipset to decode
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EFI_LEGACY_REGION_LOCK Lock; ///< Makes the specified OpROM region read only or locked.
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EFI_LEGACY_REGION_BOOT_LOCK BootLock; ///< Sets a region to read only and ensures tat flash is locked from
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///< inadvertent modification.
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EFI_LEGACY_REGION_UNLOCK UnLock; ///< Makes the specified OpROM region read-write or unlocked.
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};
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extern EFI_GUID gEfiLegacyRegionProtocolGuid;
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#endif
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