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/** @file
This protocol manages the legacy memory regions between 0xc0000 - 0xfffff
Copyright (c) 2007 - 2009, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@par Revision Reference:
This protocol is defined in Framework for EFI Compatibility Support Module spec
Version 0.97.
**/
#ifndef _EFI_LEGACY_REGION_H_
#define _EFI_LEGACY_REGION_H_
#define EFI_LEGACY_REGION_PROTOCOL_GUID \
{ \
0xfc9013a, 0x568, 0x4ba9, {0x9b, 0x7e, 0xc9, 0xc3, 0x90, 0xa6, 0x60, 0x9b } \
}
typedef struct _EFI_LEGACY_REGION_PROTOCOL EFI_LEGACY_REGION_PROTOCOL;
/**
Sets hardware to decode or not decode a region.
@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
@param Start Start of region to decode.
@param Length Size in bytes of the region.
@param On Decode/nondecode flag.
@retval EFI_SUCCESS Decode range successfully changed.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_REGION_DECODE)(
IN EFI_LEGACY_REGION_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
IN BOOLEAN *On
);
/**
Sets a region to read only.
@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
@param Start Start of region to lock.
@param Length Size in bytes of the region.
@param Granularity Lock attribute affects this granularity in bytes.
@retval EFI_SUCCESS The region was made read only.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_REGION_LOCK)(
IN EFI_LEGACY_REGION_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
);
/**
Sets a region to read only and ensures that flash is locked from being
inadvertently modified.
@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
@param Start Start of region to lock.
@param Length Size in bytes of the region.
@param Granularity Lock attribute affects this granularity in bytes.
@retval EFI_SUCCESS The region was made read only and flash is locked.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_REGION_BOOT_LOCK)(
IN EFI_LEGACY_REGION_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
);
/**
Sets a region to read-write.
@param This Indicates the EFI_LEGACY_REGION_PROTOCOL instance
@param Start Start of region to lock.
@param Length Size in bytes of the region.
@param Granularity Lock attribute affects this granularity in bytes.
@retval EFI_SUCCESS The region was successfully made read-write.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_LEGACY_REGION_UNLOCK)(
IN EFI_LEGACY_REGION_PROTOCOL *This,
IN UINT32 Start,
IN UINT32 Length,
OUT UINT32 *Granularity OPTIONAL
);
/**
Abstracts the hardware control of the physical address region 0xC0000-C0xFFFFF
for the traditional BIOS.
**/
struct _EFI_LEGACY_REGION_PROTOCOL {
EFI_LEGACY_REGION_DECODE Decode; ///< Specifies a region for the chipset to decode
EFI_LEGACY_REGION_LOCK Lock; ///< Makes the specified OpROM region read only or locked.
EFI_LEGACY_REGION_BOOT_LOCK BootLock; ///< Sets a region to read only and ensures tat flash is locked from
///< inadvertent modification.
EFI_LEGACY_REGION_UNLOCK UnLock; ///< Makes the specified OpROM region read-write or unlocked.
};
extern EFI_GUID gEfiLegacyRegionProtocolGuid;
#endif
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