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/** @file
This protocol provides services for creating ACPI system description tables.
Copyright (c) 2006 - 2008, 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.
**/
#ifndef __ACPI_SYSTEM_DESCRIPTION_TABLE_H___
#define __ACPI_SYSTEM_DESCRIPTION_TABLE_H___
#define EFI_ACPI_SDT_PROTOCOL_GUID \
{ 0xeb97088e, 0xcfdf, 0x49c6, { 0xbe, 0x4b, 0xd9, 0x6, 0xa5, 0xb2, 0xe, 0x86 }}
typedef UINT32 EFI_ACPI_TABLE_VERSION;
typedef VOID *EFI_ACPI_HANDLE;
#define EFI_ACPI_TABLE_VERSION_NONE (1 << 0)
#define EFI_ACPI_TABLE_VERSION_1_0B (1 << 1)
#define EFI_ACPI_TABLE_VERSION_2_0 (1 << 2)
#define EFI_ACPI_TABLE_VERSION_3_0 (1 << 3)
#define EFI_ACPI_TABLE_VERSION_4_0 (1 << 4)
typedef UINT32 EFI_ACPI_DATA_TYPE;
#define EFI_ACPI_DATA_TYPE_NONE 0
#define EFI_ACPI_DATA_TYPE_OPCODE 1
#define EFI_ACPI_DATA_TYPE_NAME_STRING 2
#define EFI_ACPI_DATA_TYPE_OP 3
#define EFI_ACPI_DATA_TYPE_UINT 4
#define EFI_ACPI_DATA_TYPE_STRING 5
#define EFI_ACPI_DATA_TYPE_CHILD 6
typedef struct {
UINT32 Signature;
UINT32 Length;
UINT8 Revision;
UINT8 Checksum;
CHAR8 OemId[6];
CHAR8 OemTableId[8];
UINT32 OemRevision;
UINT32 CreatorId;
UINT32 CreatorRevision;
} EFI_ACPI_SDT_HEADER;
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_NOTIFICATION_FN)(
IN EFI_ACPI_SDT_HEADER *Table, ///< A pointer to the ACPI table header.
IN EFI_ACPI_TABLE_VERSION Version, ///< The ACPI table's version.
IN UINTN TableKey ///< The table key for this ACPI table.
);
/**
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.
@param[in] Index The zero-based index of the table to retrieve.
@param[out] Table Pointer for returning the table buffer.
@param[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.
@param[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.
@retval EFI_SUCCESS The function completed successfully.
@retval EFI_NOT_FOUND The requested index is too large and a table was not found.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_GET_ACPI_TABLE)(
IN UINTN Index,
OUT EFI_ACPI_SDT_HEADER **Table,
OUT EFI_ACPI_TABLE_VERSION *Version,
OUT UINTN *TableKey
);
/**
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.
@param[in] Register If TRUE, then the specified function will be registered. If FALSE, then the specified
function will be unregistered.
@param[in] Notification Points to the callback function to be registered or unregistered.
@retval EFI_SUCCESS Callback successfully registered or unregistered.
@retval EFI_INVALID_PARAMETER Notification is NULL
@retval EFI_INVALID_PARAMETER Register is FALSE and Notification does not match a known registration function.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_REGISTER_NOTIFY)(
IN BOOLEAN Register,
IN EFI_ACPI_NOTIFICATION_FN Notification
);
/**
Create a handle from an ACPI opcode
@param[in] Buffer Points to the ACPI opcode.
@param[out] Handle Upon return, holds the handle.
@retval EFI_SUCCESS Success
@retval EFI_INVALID_PARAMETER Buffer is NULL or Handle is NULL or Buffer points to an
invalid opcode.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_OPEN)(
IN VOID *Buffer,
OUT EFI_ACPI_HANDLE *Handle
);
/**
Create a handle for the first ACPI opcode in an ACPI system description table.
@param[in] TableKey The table key for the ACPI table, as returned by GetTable().
@param[out] Handle On return, points to the newly created ACPI handle.
@retval EFI_SUCCESS Handle created successfully.
@retval EFI_NOT_FOUND TableKey does not refer to a valid ACPI table.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_OPEN_SDT)(
IN UINTN TableKey,
OUT EFI_ACPI_HANDLE *Handle
);
/**
Close an ACPI handle.
@param[in] Handle Returns the handle.
@retval EFI_SUCCESS Success
@retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_CLOSE)(
IN EFI_ACPI_HANDLE Handle
);
/**
Return the child ACPI objects.
@param[in] ParentHandle Parent handle.
@param[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.
@retval EFI_SUCCESS Success
@retval EFI_INVALID_PARAMETER ParentHandle is NULL or does not refer to a valid ACPI object.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_GET_CHILD)(
IN EFI_ACPI_HANDLE ParentHandle,
IN OUT EFI_ACPI_HANDLE *Handle
);
/**
Retrieve information about an ACPI object.
@param[in] Handle ACPI object handle.
@param[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.
@param[out] DataType Points to the returned data type or EFI_ACPI_DATA_TYPE_NONE if no data exists
for the specified index.
@param[out] Data Upon return, points to the pointer to the data.
@param[out] DataSize Upon return, points to the size of Data.
@retval
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_GET_OPTION)(
IN EFI_ACPI_HANDLE Handle,
IN UINTN Index,
OUT EFI_ACPI_DATA_TYPE *DataType,
OUT CONST VOID **Data,
OUT UINTN *DataSize
);
/**
Change information about an ACPI object.
@param[in] Handle ACPI object handle.
@param[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.
@param[in] Data Points to the data.
@param[in] DataSize The size of the Data.
@retval EFI_SUCCESS Success
@retval EFI_INVALID_PARAMETER Handle is NULL or does not refer to a valid ACPI object.
@retval EFI_BAD_BUFFER_SIZE Data cannot be accommodated in the space occupied by
the option.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_SET_OPTION)(
IN EFI_ACPI_HANDLE Handle,
IN UINTN Index,
IN CONST VOID *Data,
IN UINTN DataSize
);
/**
Returns the handle of the ACPI object representing the specified ACPI path
@param[in] HandleIn Points to the handle of the object representing the starting point for the path search.
@param[in] AcpiPath Points to the ACPI path, which conforms to the ACPI encoded path format.
@param[out] HandleOut On return, points to the ACPI object which represents AcpiPath, relative to
HandleIn.
@retval EFI_SUCCESS Success
@retval EFI_INVALID_PARAMETER HandleIn is NULL or does not refer to a valid ACPI object.
**/
typedef
EFI_STATUS
(EFIAPI *EFI_ACPI_FIND_PATH)(
IN EFI_ACPI_HANDLE HandleIn,
IN VOID *AcpiPath,
OUT EFI_ACPI_HANDLE HandleOut
);
typedef struct _EFI_ACPI_SDT_PROTOCOL {
///
/// Specifies the ACPI version supported by this protocol.
///
EFI_ACPI_TABLE_VERSION AcpiVersion;
EFI_ACPI_GET_ACPI_TABLE GetAcpiTable;
EFI_ACPI_REGISTER_NOTIFY RegisterNotify;
EFI_ACPI_OPEN Open;
EFI_ACPI_OPEN_SDT OpenSdt;
EFI_ACPI_CLOSE Close;
EFI_ACPI_GET_CHILD GetChild;
EFI_ACPI_GET_OPTION GetOption;
EFI_ACPI_SET_OPTION SetOption;
EFI_ACPI_FIND_PATH FindPath;
} EFI_ACPI_SDT_PROTOCOL;
extern EFI_GUID gEfiAcpiSdtProtocolGuid;
#endif // __ACPI_SYSTEM_DESCRIPTION_TABLE_H___
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