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/** @file
SMM Memory Attribute Protocol provides retrieval and update service
for memory attributes in EFI SMM environment.
Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef __SMM_MEMORYATTRIBUTE_H__
#define __SMM_MEMORYATTRIBUTE_H__
//{69B792EA-39CE-402D-A2A6-F721DE351DFE}
#define EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL_GUID \
{ \
0x69b792ea, 0x39ce, 0x402d, { 0xa2, 0xa6, 0xf7, 0x21, 0xde, 0x35, 0x1d, 0xfe } \
}
typedef struct _EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL;
/**
This function set given attributes of the memory region specified by
BaseAddress and Length.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes The bit mask of attributes to set for the memory
region.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of
attributes that cannot be set together.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
The bit mask of attributes is not supported for
the memory resource range specified by
BaseAddress and Length.
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_SMM_SET_MEMORY_ATTRIBUTES)(
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function clears given attributes of the memory region specified by
BaseAddress and Length.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes The bit mask of attributes to clear for the memory
region.
@retval EFI_SUCCESS The attributes were cleared for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes specified an illegal combination of
attributes that cannot be cleared together.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
The bit mask of attributes is not supported for
the memory resource range specified by
BaseAddress and Length.
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_SMM_CLEAR_MEMORY_ATTRIBUTES)(
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes
);
/**
This function retrieves the attributes of the memory region specified by
BaseAddress and Length. If different attributes are got from different part
of the memory region, EFI_NO_MAPPING will be returned.
@param This The EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL instance.
@param BaseAddress The physical address that is the start address of
a memory region.
@param Length The size in bytes of the memory region.
@param Attributes Pointer to attributes returned.
@retval EFI_SUCCESS The attributes got for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
Attributes is NULL.
@retval EFI_NO_MAPPING Attributes are not consistent cross the memory
region.
@retval EFI_UNSUPPORTED The processor does not support one or more
bytes of the memory resource range specified
by BaseAddress and Length.
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_SMM_GET_MEMORY_ATTRIBUTES)(
IN EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
OUT UINT64 *Attributes
);
///
/// SMM Memory Attribute Protocol provides services to retrieve or update
/// attribute of memory in the EFI SMM environment.
///
struct _EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL {
EDKII_SMM_GET_MEMORY_ATTRIBUTES GetMemoryAttributes;
EDKII_SMM_SET_MEMORY_ATTRIBUTES SetMemoryAttributes;
EDKII_SMM_CLEAR_MEMORY_ATTRIBUTES ClearMemoryAttributes;
};
extern EFI_GUID gEdkiiSmmMemoryAttributeProtocolGuid;
#endif
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