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/** @file
Copyright (c) 2023, Google LLC. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef EDKII_MEMORY_ATTRIBUTE_PPI_H_
#define EDKII_MEMORY_ATTRIBUTE_PPI_H_
#include <Uefi/UefiSpec.h>
///
/// Global ID for the EDKII_MEMORY_ATTRIBUTE_PPI.
///
#define EDKII_MEMORY_ATTRIBUTE_PPI_GUID \
{ \
0x1be840de, 0x2d92, 0x41ec, { 0xb6, 0xd3, 0x19, 0x64, 0x13, 0x50, 0x51, 0xfb } \
}
///
/// Forward declaration for the EDKII_MEMORY_ATTRIBUTE_PPI.
///
typedef struct _EDKII_MEMORY_ATTRIBUTE_PPI EDKII_MEMORY_ATTRIBUTE_PPI;
/**
Set the requested memory permission attributes on a region of memory.
BaseAddress and Length must be aligned to EFI_PAGE_SIZE.
Attributes must contain a combination of EFI_MEMORY_RP, EFI_MEMORY_RO and
EFI_MEMORY_XP, and specifies the attributes that must be set for the
region in question. Attributes that are omitted will be cleared from the
region only if they are set in AttributeMask.
AttributeMask must contain a combination of EFI_MEMORY_RP, EFI_MEMORY_RO and
EFI_MEMORY_XP, and specifies the attributes that the call will operate on.
AttributeMask must not be 0x0, and must contain at least the bits set in
Attributes.
@param[in] This The protocol instance pointer.
@param[in] BaseAddress The physical address that is the start address
of a memory region.
@param[in] Length The size in bytes of the memory region.
@param[in] Attributes Memory attributes to set or clear.
@param[in] AttributeMask Mask of memory attributes to operate on.
@retval EFI_SUCCESS The attributes were set for the memory region.
@retval EFI_INVALID_PARAMETER Length is zero.
AttributeMask is zero.
AttributeMask lacks bits set in Attributes.
BaseAddress or Length is not suitably aligned.
@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.
@retval EFI_OUT_OF_RESOURCES Requested attributes cannot be applied due to
lack of system resources.
**/
typedef
EFI_STATUS
(EFIAPI *EDKII_MEMORY_ATTRIBUTE_SET_PERMISSIONS)(
IN EDKII_MEMORY_ATTRIBUTE_PPI *This,
IN EFI_PHYSICAL_ADDRESS BaseAddress,
IN UINT64 Length,
IN UINT64 Attributes,
IN UINT64 AttributeMask
);
///
/// This PPI contains a set of services to manage memory permission attributes.
///
struct _EDKII_MEMORY_ATTRIBUTE_PPI {
EDKII_MEMORY_ATTRIBUTE_SET_PERMISSIONS SetPermissions;
};
extern EFI_GUID gEdkiiMemoryAttributePpiGuid;
#endif
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