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/** @file
The file provides the protocol to install or remove an ACPI
table from a platform.
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@par Revision Reference:
This Protocol was introduced in UEFI Specification 2.3.
**/
#ifndef __ACPI_TABLE_H___
#define __ACPI_TABLE_H___
FILE_LICENCE ( BSD2_PATENT );
#define EFI_ACPI_TABLE_PROTOCOL_GUID \
{ 0xffe06bdd, 0x6107, 0x46a6, { 0x7b, 0xb2, 0x5a, 0x9c, 0x7e, 0xc5, 0x27, 0x5c }}
typedef struct _EFI_ACPI_TABLE_PROTOCOL EFI_ACPI_TABLE_PROTOCOL;
/**
The InstallAcpiTable() function allows a caller to install an
ACPI table. When successful, the table will be linked by the
RSDT/XSDT. AcpiTableBuffer specifies the table to be installed.
InstallAcpiTable() will make a copy of the table and insert the
copy into the RSDT/XSDT. InstallAcpiTable() must insert the new
table at the end of the RSDT/XSDT. To prevent namespace
collision, ACPI tables may be created using UEFI ACPI table
format. If this protocol is used to install a table with a
signature already present in the system, the new table will not
replace the existing table. It is a platform implementation
decision to add a new table with a signature matching an
existing table or disallow duplicate table signatures and
return EFI_ACCESS_DENIED. On successful output, TableKey is
initialized with a unique key. Its value may be used in a
subsequent call to UninstallAcpiTable to remove an ACPI table.
If an EFI application is running at the time of this call, the
relevant EFI_CONFIGURATION_TABLE pointer to the RSDT is no
longer considered valid.
@param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
@param AcpiTableBuffer A pointer to a buffer containing the
ACPI table to be installed.
@param AcpiTableBufferSize Specifies the size, in bytes, of
the AcpiTableBuffer buffer.
@param TableKey Returns a key to refer to the ACPI table.
@retval EFI_SUCCESS The table was successfully inserted
@retval EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL,
TableKey is NULL, or
AcpiTableBufferSize and the size
field embedded in the ACPI table
pointed to by AcpiTableBuffer
are not in sync.
@retval EFI_OUT_OF_RESOURCES Insufficient resources exist to
complete the request.
@retval EFI_ACCESS_DENIED The table signature matches a table already
present in the system and platform policy
does not allow duplicate tables of this type.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_TABLE_INSTALL_ACPI_TABLE)(
IN EFI_ACPI_TABLE_PROTOCOL *This,
IN VOID *AcpiTableBuffer,
IN UINTN AcpiTableBufferSize,
OUT UINTN *TableKey
);
/**
The UninstallAcpiTable() function allows a caller to remove an
ACPI table. The routine will remove its reference from the
RSDT/XSDT. A table is referenced by the TableKey parameter
returned from a prior call to InstallAcpiTable(). If an EFI
application is running at the time of this call, the relevant
EFI_CONFIGURATION_TABLE pointer to the RSDT is no longer
considered valid.
@param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
@param TableKey Specifies the table to uninstall. The key was
returned from InstallAcpiTable().
@retval EFI_SUCCESS The table was successfully inserted
@retval EFI_NOT_FOUND TableKey does not refer to a valid key
for a table entry.
@retval EFI_OUT_OF_RESOURCES Insufficient resources exist to
complete the request.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE)(
IN EFI_ACPI_TABLE_PROTOCOL *This,
IN UINTN TableKey
);
///
/// The EFI_ACPI_TABLE_PROTOCOL provides the ability for a component
/// to install and uninstall ACPI tables from a platform.
///
struct _EFI_ACPI_TABLE_PROTOCOL {
EFI_ACPI_TABLE_INSTALL_ACPI_TABLE InstallAcpiTable;
EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE UninstallAcpiTable;
};
extern EFI_GUID gEfiAcpiTableProtocolGuid;
#endif
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