#include "AcpiTable.h"

Functions
EFI_ACPI_TABLE_INSTANCE *	SdtGetAcpiTableInstance (VOID)

EFI_ACPI_TABLE_LIST *	FindTableByBuffer (IN VOID *Buffer)

EFI_STATUS	SdtUpdateAmlChecksum (IN VOID *Buffer)

EFI_STATUS	SdtGetMaxAmlBufferSize (IN VOID Buffer, OUT UINTN MaxSize)

VOID	SdtNotifyAcpiList (IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance, IN EFI_ACPI_TABLE_VERSION Version, IN UINTN Handle)

EFI_STATUS	SdtGetAcpiTable (IN EFI_ACPI_TABLE_INSTANCE AcpiTableInstance, IN UINTN Index, OUT EFI_ACPI_SDT_HEADER Table, OUT EFI_ACPI_TABLE_VERSION Version, OUT UINTN *TableKey)

EFI_STATUS EFIAPI	GetAcpiTable2 (IN UINTN Index, OUT EFI_ACPI_SDT_HEADER *Table, OUT EFI_ACPI_TABLE_VERSION Version, OUT UINTN *TableKey)

VOID	SdtRegisterNotify (IN EFI_ACPI_NOTIFICATION_FN Notification)

EFI_STATUS	SdtUnregisterNotify (IN EFI_ACPI_NOTIFICATION_FN Notification)

EFI_STATUS EFIAPI	RegisterNotify (IN BOOLEAN Register, IN EFI_ACPI_NOTIFICATION_FN Notification)

EFI_STATUS	SdtOpenSdtTable (IN UINTN TableKey, OUT EFI_ACPI_HANDLE *Handle)

EFI_STATUS EFIAPI	OpenSdt (IN UINTN TableKey, OUT EFI_ACPI_HANDLE *Handle)

EFI_STATUS	SdtOpenEx (IN VOID Buffer, IN UINTN BufferSize, OUT EFI_ACPI_HANDLE Handle)

EFI_STATUS EFIAPI	Open (IN VOID Buffer, OUT EFI_ACPI_HANDLE Handle)

EFI_STATUS EFIAPI	Close (IN EFI_ACPI_HANDLE Handle)

EFI_STATUS EFIAPI	GetOption (IN EFI_ACPI_HANDLE Handle, IN UINTN Index, OUT EFI_ACPI_DATA_TYPE DataType, OUT CONST VOID Data, OUT UINTN DataSize)

EFI_STATUS EFIAPI	SetOption (IN EFI_ACPI_HANDLE Handle, IN UINTN Index, IN CONST VOID *Data, IN UINTN DataSize)

EFI_STATUS EFIAPI	GetChild (IN EFI_ACPI_HANDLE ParentHandle, IN OUT EFI_ACPI_HANDLE *Handle)

EFI_STATUS	SdtFindPathFromNonRoot (IN EFI_ACPI_HANDLE HandleIn, IN UINT8 AmlPath, OUT EFI_ACPI_HANDLE HandleOut)

EFI_AML_HANDLE *	SdtDuplicateHandle (IN EFI_AML_HANDLE *AmlHandle)

EFI_STATUS	SdtFindPathFromRoot (IN EFI_ACPI_HANDLE HandleIn, IN UINT8 AmlPath, OUT EFI_ACPI_HANDLE HandleOut)

EFI_STATUS EFIAPI	FindPath (IN EFI_ACPI_HANDLE HandleIn, IN VOID AcpiPath, OUT EFI_ACPI_HANDLE HandleOut)

VOID	SdtAcpiTableAcpiSdtConstructor (IN EFI_ACPI_TABLE_INSTANCE *AcpiTableInstance)

Variables
GLOBAL_REMOVE_IF_UNREFERENCED EFI_ACPI_SDT_PROTOCOL	mAcpiSdtProtocolTemplate

Detailed Description

ACPI Sdt Protocol Driver

Copyright (c) 2010 - 2021, Intel Corporation. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent

Definition in file AcpiSdt.c.

Function Documentation

◆ Close()

EFI_STATUS EFIAPI Close ( IN EFI_ACPI_HANDLE Handle )

Close an ACPI handle.

Parameters

[in] Handle Returns the handle.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	Handle is NULL or does not refer to a valid ACPI object.

Definition at line 640 of file AcpiSdt.c.

◆ FindPath()

EFI_STATUS EFIAPI FindPath	(	IN EFI_ACPI_HANDLE	HandleIn,
		IN VOID *	AcpiPath,
		OUT EFI_ACPI_HANDLE *	HandleOut
	)

Returns the handle of the ACPI object representing the specified ACPI path

Parameters

[in]	HandleIn	Points to the handle of the object representing the starting point for the path search.
[in]	AcpiPath	Points to the ACPI path, which conforms to the ACPI encoded path format.
[out]	HandleOut	On return, points to the ACPI object which represents AcpiPath, relative to HandleIn.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	HandleIn is NULL or does not refer to a valid ACPI object.

Definition at line 1054 of file AcpiSdt.c.

◆ FindTableByBuffer()

EFI_ACPI_TABLE_LIST * FindTableByBuffer ( IN VOID * Buffer )

This function finds the table specified by the buffer.

Parameters

[in] Buffer Table buffer to find.

Returns: ACPI table list.

Definition at line 49 of file AcpiSdt.c.

◆ GetAcpiTable2()

EFI_STATUS EFIAPI GetAcpiTable2	(	IN UINTN	Index,
		OUT EFI_ACPI_SDT_HEADER **	Table,
		OUT EFI_ACPI_TABLE_VERSION *	Version,
		OUT UINTN *	TableKey
	)

Returns a requested ACPI table.

The GetAcpiTable() function returns a pointer to a buffer containing the ACPI table associated with the Index that was input. The following structures are not considered elements in the list of ACPI tables:

Root System Description Pointer (RSD_PTR)
Root System Description Table (RSDT)
Extended System Description Table (XSDT) Version is updated with a bit map containing all the versions of ACPI of which the table is a member. For tables installed via the EFI_ACPI_TABLE_PROTOCOL.InstallAcpiTable() interface, the function returns the value of EFI_ACPI_STD_PROTOCOL.AcpiVersion.

Parameters

[in]	Index	The zero-based index of the table to retrieve.
[out]	Table	Pointer for returning the table buffer.
[out]	Version	On return, updated with the ACPI versions to which this table belongs. Type EFI_ACPI_TABLE_VERSION is defined in "Related Definitions" in the EFI_ACPI_SDT_PROTOCOL.
[out]	TableKey	On return, points to the table key for the specified ACPI system definition table. This is identical to the table key used in the EFI_ACPI_TABLE_PROTOCOL. The TableKey can be passed to EFI_ACPI_TABLE_PROTOCOL.UninstallAcpiTable() to uninstall the table.

Return values

EFI_SUCCESS	The function completed successfully.
EFI_NOT_FOUND	The requested index is too large and a table was not found.

Definition at line 292 of file AcpiSdt.c.

◆ GetChild()

EFI_STATUS EFIAPI GetChild	(	IN EFI_ACPI_HANDLE	ParentHandle,
		IN OUT EFI_ACPI_HANDLE *	Handle
	)

Return the child ACPI objects.

Parameters

[in]	ParentHandle	Parent handle.
[in,out]	Handle	On entry, points to the previously returned handle or NULL to start with the first handle. On return, points to the next returned ACPI handle or NULL if there are no child objects.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	ParentHandle is NULL or does not refer to a valid ACPI object.

Definition at line 832 of file AcpiSdt.c.

◆ GetOption()

EFI_STATUS EFIAPI GetOption	(	IN EFI_ACPI_HANDLE	Handle,
		IN UINTN	Index,
		OUT EFI_ACPI_DATA_TYPE *	DataType,
		OUT CONST VOID **	Data,
		OUT UINTN *	DataSize
	)

Retrieve information about an ACPI object.

Parameters

[in]	Handle	ACPI object handle.
[in]	Index	Index of the data to retrieve from the object. In general, indexes read from left-to-right in the ACPI encoding, with index 0 always being the ACPI opcode.
[out]	DataType	Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists for the specified index.
[out]	Data	Upon return, points to the pointer to the data.
[out]	DataSize	Upon return, points to the size of Data.

Return values

EFI_SUCCESS	Success.
EFI_INVALID_PARAMETER	Handle is NULL or does not refer to a valid ACPI object.

Definition at line 692 of file AcpiSdt.c.

◆ Open()

EFI_STATUS EFIAPI Open	(	IN VOID *	Buffer,
		OUT EFI_ACPI_HANDLE *	Handle
	)

Create a handle from an ACPI opcode

Parameters

[in]	Buffer	Points to the ACPI opcode.
[out]	Handle	Upon return, holds the handle.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	Buffer is NULL or Handle is NULL or Buffer points to an invalid opcode.

Definition at line 605 of file AcpiSdt.c.

◆ OpenSdt()

EFI_STATUS EFIAPI OpenSdt	(	IN UINTN	TableKey,
		OUT EFI_ACPI_HANDLE *	Handle
	)

Create a handle for the first ACPI opcode in an ACPI system description table.

Parameters

[in]	TableKey	The table key for the ACPI table, as returned by GetTable().
[out]	Handle	On return, points to the newly created ACPI handle.

Return values

EFI_SUCCESS	Handle created successfully.
EFI_NOT_FOUND	TableKey does not refer to a valid ACPI table.

Definition at line 520 of file AcpiSdt.c.

◆ RegisterNotify()

EFI_STATUS EFIAPI RegisterNotify	(	IN BOOLEAN	Register,
		IN EFI_ACPI_NOTIFICATION_FN	Notification
	)

Register or unregister a callback when an ACPI table is installed.

This function registers or unregisters a function which will be called whenever a new ACPI table is installed.

Parameters

[in]	Register	If TRUE, then the specified function will be registered. If FALSE, then the specified function will be unregistered.
[in]	Notification	Points to the callback function to be registered or unregistered.

Return values

EFI_SUCCESS	Callback successfully registered or unregistered.
EFI_INVALID_PARAMETER	Notification is NULL
EFI_INVALID_PARAMETER	Register is FALSE and Notification does not match a known registration function.

Definition at line 426 of file AcpiSdt.c.

◆ SdtAcpiTableAcpiSdtConstructor()

VOID SdtAcpiTableAcpiSdtConstructor ( IN EFI_ACPI_TABLE_INSTANCE * AcpiTableInstance )

This function initializes AcpiSdt protocol in ACPI table instance.

Parameters

[in] AcpiTableInstance Instance to construct

Definition at line 1112 of file AcpiSdt.c.

◆ SdtDuplicateHandle()

EFI_AML_HANDLE * SdtDuplicateHandle ( IN EFI_AML_HANDLE * AmlHandle )

Duplicate AML handle.

Parameters

[in] AmlHandle Handle to be duplicated.

Returns: Duplicated AML handle.

Definition at line 935 of file AcpiSdt.c.

◆ SdtFindPathFromNonRoot()

EFI_STATUS SdtFindPathFromNonRoot	(	IN EFI_ACPI_HANDLE	HandleIn,
		IN UINT8 *	AmlPath,
		OUT EFI_ACPI_HANDLE *	HandleOut
	)

Returns the handle of the ACPI object representing the specified ACPI path

Parameters

[in]	HandleIn	Points to the handle of the object representing the starting point for the path search.
[in]	AmlPath	Points to the AML path.
[out]	HandleOut	On return, points to the ACPI object which represents AcpiPath, relative to HandleIn.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	HandleIn is NULL or does not refer to a valid ACPI object.

Definition at line 898 of file AcpiSdt.c.

◆ SdtFindPathFromRoot()

EFI_STATUS SdtFindPathFromRoot	(	IN EFI_ACPI_HANDLE	HandleIn,
		IN UINT8 *	AmlPath,
		OUT EFI_ACPI_HANDLE *	HandleOut
	)

Returns the handle of the ACPI object representing the specified ACPI path

Parameters

[in]	HandleIn	Points to the handle of the object representing the starting point for the path search.
[in]	AmlPath	Points to the AML path.
[out]	HandleOut	On return, points to the ACPI object which represents AcpiPath, relative to HandleIn.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	HandleIn is NULL or does not refer to a valid ACPI object.
EFI_OUT_OF_RESOURCES	Could not allocate a required resource.

Definition at line 965 of file AcpiSdt.c.

◆ SdtGetAcpiTable()

EFI_STATUS SdtGetAcpiTable	(	IN EFI_ACPI_TABLE_INSTANCE *	AcpiTableInstance,
		IN UINTN	Index,
		OUT EFI_ACPI_SDT_HEADER **	Table,
		OUT EFI_ACPI_TABLE_VERSION *	Version,
		OUT UINTN *	TableKey
	)

Returns a requested ACPI table.

The following structures are not considered elements in the list of ACPI tables:

Root System Description Pointer (RSD_PTR)
Root System Description Table (RSDT)
Extended System Description Table (XSDT) Version is updated with a bit map containing all the versions of ACPI of which the table is a member. For tables installed via the EFI_ACPI_TABLE_PROTOCOL.InstallAcpiTable() interface, the function returns the value of EFI_ACPI_STD_PROTOCOL.AcpiVersion.

Parameters

[in]	AcpiTableInstance	ACPI table Instance.
[in]	Index	The zero-based index of the table to retrieve.
[out]	Table	Pointer for returning the table buffer.
[out]	Version	On return, updated with the ACPI versions to which this table belongs. Type EFI_ACPI_TABLE_VERSION is defined in "Related Definitions" in the EFI_ACPI_SDT_PROTOCOL.
[out]	TableKey	On return, points to the table key for the specified ACPI system definition table. This is identical to the table key used in the EFI_ACPI_TABLE_PROTOCOL. The TableKey can be passed to EFI_ACPI_TABLE_PROTOCOL.UninstallAcpiTable() to uninstall the table.

Return values

EFI_SUCCESS	The function completed successfully.
EFI_NOT_FOUND	The requested index is too large and a table was not found.

Definition at line 218 of file AcpiSdt.c.

◆ SdtGetAcpiTableInstance()

EFI_ACPI_TABLE_INSTANCE * SdtGetAcpiTableInstance ( VOID )

This function returns ACPI Table instance.

Returns: AcpiTableInstance

Definition at line 34 of file AcpiSdt.c.

◆ SdtGetMaxAmlBufferSize()

EFI_STATUS SdtGetMaxAmlBufferSize	(	IN VOID *	Buffer,
		OUT UINTN *	MaxSize
	)

This function finds MAX AML buffer size. It will search the ACPI table installed by ACPI_TABLE protocol.

Parameters

[in]	Buffer	A piece of AML code buffer pointer.
[out]	MaxSize	On return it holds the MAX size of buffer.

Return values

EFI_SUCCESS	The table holds the AML buffer is found, and MAX size if returned.
EFI_NOT_FOUND	The table holds the AML buffer is not found.

Definition at line 126 of file AcpiSdt.c.

◆ SdtNotifyAcpiList()

VOID SdtNotifyAcpiList	(	IN EFI_ACPI_TABLE_INSTANCE *	AcpiTableInstance,
		IN EFI_ACPI_TABLE_VERSION	Version,
		IN UINTN	Handle
	)

This function invokes ACPI notification.

Parameters

[in]	AcpiTableInstance	Instance to AcpiTable
[in]	Version	Version(s) to set.
[in]	Handle	Handle of the table.

Definition at line 150 of file AcpiSdt.c.

◆ SdtOpenEx()

EFI_STATUS SdtOpenEx	(	IN VOID *	Buffer,
		IN UINTN	BufferSize,
		OUT EFI_ACPI_HANDLE *	Handle
	)

Create a handle from an ACPI opcode

Parameters

[in]	Buffer	Points to the ACPI opcode.
[in]	BufferSize	Max buffer size.
[out]	Handle	Upon return, holds the handle.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	Buffer is NULL or Handle is NULL or Buffer points to an invalid opcode.
EFI_OUT_OF_RESOURCES	Could not allocate a required resource.

Definition at line 546 of file AcpiSdt.c.

◆ SdtOpenSdtTable()

EFI_STATUS SdtOpenSdtTable	(	IN UINTN	TableKey,
		OUT EFI_ACPI_HANDLE *	Handle
	)

Create a handle for the first ACPI opcode in an ACPI system description table.

Parameters

[in]	TableKey	The table key for the ACPI table, as returned by GetTable().
[out]	Handle	On return, points to the newly created ACPI handle.

Return values

EFI_SUCCESS	Handle created successfully.
EFI_NOT_FOUND	TableKey does not refer to a valid ACPI table.

Definition at line 462 of file AcpiSdt.c.

◆ SdtRegisterNotify()

VOID SdtRegisterNotify ( IN EFI_ACPI_NOTIFICATION_FN Notification )

Register a callback when an ACPI table is installed.

This function registers a function which will be called whenever a new ACPI table is installed.

Parameters

[in] Notification Points to the callback function to be registered

Definition at line 321 of file AcpiSdt.c.

◆ SdtUnregisterNotify()

EFI_STATUS SdtUnregisterNotify ( IN EFI_ACPI_NOTIFICATION_FN Notification )

Unregister a callback when an ACPI table is installed.

This function unregisters a function which will be called whenever a new ACPI table is installed.

Parameters

[in] Notification Points to the callback function to be unregistered.

Return values

EFI_SUCCESS	Callback successfully unregistered.
EFI_INVALID_PARAMETER	Notification does not match a known registration function.

Definition at line 368 of file AcpiSdt.c.

◆ SdtUpdateAmlChecksum()

EFI_STATUS SdtUpdateAmlChecksum ( IN VOID * Buffer )

This function updates AML table checksum. It will search the ACPI table installed by ACPI_TABLE protocol.

Parameters

[in] Buffer A piece of AML code buffer pointer.

Return values

EFI_SUCCESS	The table holds the AML buffer is found, and checksum is updated.
EFI_NOT_FOUND	The table holds the AML buffer is not found.

Definition at line 96 of file AcpiSdt.c.

◆ SetOption()

EFI_STATUS EFIAPI SetOption	(	IN EFI_ACPI_HANDLE	Handle,
		IN UINTN	Index,
		IN CONST VOID *	Data,
		IN UINTN	DataSize
	)

Change information about an ACPI object.

Parameters

[in]	Handle	ACPI object handle.
[in]	Index	Index of the data to retrieve from the object. In general, indexes read from left-to-right in the ACPI encoding, with index 0 always being the ACPI opcode.
[in]	Data	Points to the data.
[in]	DataSize	The size of the Data.

Return values

EFI_SUCCESS	Success
EFI_INVALID_PARAMETER	Handle is NULL or does not refer to a valid ACPI object.
EFI_BAD_BUFFER_SIZE	Data cannot be accommodated in the space occupied by the option.

Definition at line 757 of file AcpiSdt.c.

Variable Documentation

◆ mAcpiSdtProtocolTemplate

GLOBAL_REMOVE_IF_UNREFERENCED EFI_ACPI_SDT_PROTOCOL mAcpiSdtProtocolTemplate

Initial value:

= {
  EFI_ACPI_TABLE_VERSION_NONE,
  GetAcpiTable2,
  RegisterNotify,
  Open,
  OpenSdt,
  Close,
  GetChild,
  GetOption,
  SetOption,
  FindPath
}

Definition at line 15 of file AcpiSdt.c.

Functions

Variables

Detailed Description

Function Documentation

◆ Close()

◆ FindPath()

◆ FindTableByBuffer()

◆ GetAcpiTable2()

◆ GetChild()

◆ GetOption()

◆ Open()

◆ OpenSdt()

◆ RegisterNotify()

◆ SdtAcpiTableAcpiSdtConstructor()

◆ SdtDuplicateHandle()

◆ SdtFindPathFromNonRoot()

◆ SdtFindPathFromRoot()

◆ SdtGetAcpiTable()

◆ SdtGetAcpiTableInstance()

◆ SdtGetMaxAmlBufferSize()

◆ SdtNotifyAcpiList()

◆ SdtOpenEx()

◆ SdtOpenSdtTable()

◆ SdtRegisterNotify()

◆ SdtUnregisterNotify()

◆ SdtUpdateAmlChecksum()

◆ SetOption()

Variable Documentation

◆ mAcpiSdtProtocolTemplate