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acobject.h revision 1.1
      1 
      2 /******************************************************************************
      3  *
      4  * Name: acobject.h - Definition of ACPI_OPERAND_OBJECT  (Internal object only)
      5  *
      6  *****************************************************************************/
      7 
      8 /******************************************************************************
      9  *
     10  * 1. Copyright Notice
     11  *
     12  * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
     13  * All rights reserved.
     14  *
     15  * 2. License
     16  *
     17  * 2.1. This is your license from Intel Corp. under its intellectual property
     18  * rights.  You may have additional license terms from the party that provided
     19  * you this software, covering your right to use that party's intellectual
     20  * property rights.
     21  *
     22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
     23  * copy of the source code appearing in this file ("Covered Code") an
     24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
     25  * base code distributed originally by Intel ("Original Intel Code") to copy,
     26  * make derivatives, distribute, use and display any portion of the Covered
     27  * Code in any form, with the right to sublicense such rights; and
     28  *
     29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
     30  * license (with the right to sublicense), under only those claims of Intel
     31  * patents that are infringed by the Original Intel Code, to make, use, sell,
     32  * offer to sell, and import the Covered Code and derivative works thereof
     33  * solely to the minimum extent necessary to exercise the above copyright
     34  * license, and in no event shall the patent license extend to any additions
     35  * to or modifications of the Original Intel Code.  No other license or right
     36  * is granted directly or by implication, estoppel or otherwise;
     37  *
     38  * The above copyright and patent license is granted only if the following
     39  * conditions are met:
     40  *
     41  * 3. Conditions
     42  *
     43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
     44  * Redistribution of source code of any substantial portion of the Covered
     45  * Code or modification with rights to further distribute source must include
     46  * the above Copyright Notice, the above License, this list of Conditions,
     47  * and the following Disclaimer and Export Compliance provision.  In addition,
     48  * Licensee must cause all Covered Code to which Licensee contributes to
     49  * contain a file documenting the changes Licensee made to create that Covered
     50  * Code and the date of any change.  Licensee must include in that file the
     51  * documentation of any changes made by any predecessor Licensee.  Licensee
     52  * must include a prominent statement that the modification is derived,
     53  * directly or indirectly, from Original Intel Code.
     54  *
     55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
     56  * Redistribution of source code of any substantial portion of the Covered
     57  * Code or modification without rights to further distribute source must
     58  * include the following Disclaimer and Export Compliance provision in the
     59  * documentation and/or other materials provided with distribution.  In
     60  * addition, Licensee may not authorize further sublicense of source of any
     61  * portion of the Covered Code, and must include terms to the effect that the
     62  * license from Licensee to its licensee is limited to the intellectual
     63  * property embodied in the software Licensee provides to its licensee, and
     64  * not to intellectual property embodied in modifications its licensee may
     65  * make.
     66  *
     67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
     68  * substantial portion of the Covered Code or modification must reproduce the
     69  * above Copyright Notice, and the following Disclaimer and Export Compliance
     70  * provision in the documentation and/or other materials provided with the
     71  * distribution.
     72  *
     73  * 3.4. Intel retains all right, title, and interest in and to the Original
     74  * Intel Code.
     75  *
     76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
     77  * Intel shall be used in advertising or otherwise to promote the sale, use or
     78  * other dealings in products derived from or relating to the Covered Code
     79  * without prior written authorization from Intel.
     80  *
     81  * 4. Disclaimer and Export Compliance
     82  *
     83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
     84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
     85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
     86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
     87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
     88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
     89  * PARTICULAR PURPOSE.
     90  *
     91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
     92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
     93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
     94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
     95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
     96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
     97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
     98  * LIMITED REMEDY.
     99  *
    100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
    101  * software or system incorporating such software without first obtaining any
    102  * required license or other approval from the U. S. Department of Commerce or
    103  * any other agency or department of the United States Government.  In the
    104  * event Licensee exports any such software from the United States or
    105  * re-exports any such software from a foreign destination, Licensee shall
    106  * ensure that the distribution and export/re-export of the software is in
    107  * compliance with all laws, regulations, orders, or other restrictions of the
    108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
    109  * any of its subsidiaries will export/re-export any technical data, process,
    110  * software, or service, directly or indirectly, to any country for which the
    111  * United States government or any agency thereof requires an export license,
    112  * other governmental approval, or letter of assurance, without first obtaining
    113  * such license, approval or letter.
    114  *
    115  *****************************************************************************/
    116 
    117 #ifndef _ACOBJECT_H
    118 #define _ACOBJECT_H
    119 
    120 /* acpisrc:StructDefs -- for acpisrc conversion */
    121 
    122 
    123 /*
    124  * The ACPI_OPERAND_OBJECT is used to pass AML operands from the dispatcher
    125  * to the interpreter, and to keep track of the various handlers such as
    126  * address space handlers and notify handlers. The object is a constant
    127  * size in order to allow it to be cached and reused.
    128  *
    129  * Note: The object is optimized to be aligned and will not work if it is
    130  * byte-packed.
    131  */
    132 #if ACPI_MACHINE_WIDTH == 64
    133 #pragma pack(8)
    134 #else
    135 #pragma pack(4)
    136 #endif
    137 
    138 /*******************************************************************************
    139  *
    140  * Common Descriptors
    141  *
    142  ******************************************************************************/
    143 
    144 /*
    145  * Common area for all objects.
    146  *
    147  * DescriptorType is used to differentiate between internal descriptors, and
    148  * must be in the same place across all descriptors
    149  *
    150  * Note: The DescriptorType and Type fields must appear in the identical
    151  * position in both the ACPI_NAMESPACE_NODE and ACPI_OPERAND_OBJECT
    152  * structures.
    153  */
    154 #define ACPI_OBJECT_COMMON_HEADER \
    155     union acpi_operand_object       *NextObject;        /* Objects linked to parent NS node */\
    156     UINT8                           DescriptorType;     /* To differentiate various internal objs */\
    157     UINT8                           Type;               /* ACPI_OBJECT_TYPE */\
    158     UINT16                          ReferenceCount;     /* For object deletion management */\
    159     UINT8                           Flags;
    160     /*
    161      * Note: There are 3 bytes available here before the
    162      * next natural alignment boundary (for both 32/64 cases)
    163      */
    164 
    165 /* Values for Flag byte above */
    166 
    167 #define AOPOBJ_AML_CONSTANT         0x01    /* Integer is an AML constant */
    168 #define AOPOBJ_STATIC_POINTER       0x02    /* Data is part of an ACPI table, don't delete */
    169 #define AOPOBJ_DATA_VALID           0x04    /* Object is intialized and data is valid */
    170 #define AOPOBJ_OBJECT_INITIALIZED   0x08    /* Region is initialized, _REG was run */
    171 #define AOPOBJ_SETUP_COMPLETE       0x10    /* Region setup is complete */
    172 #define AOPOBJ_INVALID              0x20    /* Host OS won't allow a Region address */
    173 #define AOPOBJ_MODULE_LEVEL         0x40    /* Method is actually module-level code */
    174 #define AOPOBJ_MODIFIED_NAMESPACE   0x80    /* Method modified the namespace */
    175 
    176 
    177 /******************************************************************************
    178  *
    179  * Basic data types
    180  *
    181  *****************************************************************************/
    182 
    183 typedef struct acpi_object_common
    184 {
    185     ACPI_OBJECT_COMMON_HEADER
    186 
    187 } ACPI_OBJECT_COMMON;
    188 
    189 
    190 typedef struct acpi_object_integer
    191 {
    192     ACPI_OBJECT_COMMON_HEADER
    193     UINT8                           Fill[3];            /* Prevent warning on some compilers */
    194     UINT64                          Value;
    195 
    196 } ACPI_OBJECT_INTEGER;
    197 
    198 
    199 /*
    200  * Note: The String and Buffer object must be identical through the Pointer
    201  * and length elements.  There is code that depends on this.
    202  *
    203  * Fields common to both Strings and Buffers
    204  */
    205 #define ACPI_COMMON_BUFFER_INFO(_Type) \
    206     _Type                           *Pointer; \
    207     UINT32                          Length;
    208 
    209 
    210 typedef struct acpi_object_string   /* Null terminated, ASCII characters only */
    211 {
    212     ACPI_OBJECT_COMMON_HEADER
    213     ACPI_COMMON_BUFFER_INFO         (char)              /* String in AML stream or allocated string */
    214 
    215 } ACPI_OBJECT_STRING;
    216 
    217 
    218 typedef struct acpi_object_buffer
    219 {
    220     ACPI_OBJECT_COMMON_HEADER
    221     ACPI_COMMON_BUFFER_INFO         (UINT8)             /* Buffer in AML stream or allocated buffer */
    222     UINT32                          AmlLength;
    223     UINT8                           *AmlStart;
    224     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
    225 
    226 } ACPI_OBJECT_BUFFER;
    227 
    228 
    229 typedef struct acpi_object_package
    230 {
    231     ACPI_OBJECT_COMMON_HEADER
    232     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
    233     union acpi_operand_object       **Elements;         /* Array of pointers to AcpiObjects */
    234     UINT8                           *AmlStart;
    235     UINT32                          AmlLength;
    236     UINT32                          Count;              /* # of elements in package */
    237 
    238 } ACPI_OBJECT_PACKAGE;
    239 
    240 
    241 /******************************************************************************
    242  *
    243  * Complex data types
    244  *
    245  *****************************************************************************/
    246 
    247 typedef struct acpi_object_event
    248 {
    249     ACPI_OBJECT_COMMON_HEADER
    250     ACPI_SEMAPHORE                  OsSemaphore;        /* Actual OS synchronization object */
    251 
    252 } ACPI_OBJECT_EVENT;
    253 
    254 
    255 typedef struct acpi_object_mutex
    256 {
    257     ACPI_OBJECT_COMMON_HEADER
    258     UINT8                           SyncLevel;          /* 0-15, specified in Mutex() call */
    259     UINT16                          AcquisitionDepth;   /* Allow multiple Acquires, same thread */
    260     ACPI_MUTEX                      OsMutex;            /* Actual OS synchronization object */
    261     ACPI_THREAD_ID                  ThreadId;           /* Current owner of the mutex */
    262     struct acpi_thread_state        *OwnerThread;       /* Current owner of the mutex */
    263     union acpi_operand_object       *Prev;              /* Link for list of acquired mutexes */
    264     union acpi_operand_object       *Next;              /* Link for list of acquired mutexes */
    265     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
    266     UINT8                           OriginalSyncLevel;  /* Owner's original sync level (0-15) */
    267 
    268 } ACPI_OBJECT_MUTEX;
    269 
    270 
    271 typedef struct acpi_object_region
    272 {
    273     ACPI_OBJECT_COMMON_HEADER
    274     UINT8                           SpaceId;
    275     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
    276     union acpi_operand_object       *Handler;           /* Handler for region access */
    277     union acpi_operand_object       *Next;
    278     ACPI_PHYSICAL_ADDRESS           Address;
    279     UINT32                          Length;
    280 
    281 } ACPI_OBJECT_REGION;
    282 
    283 
    284 typedef struct acpi_object_method
    285 {
    286     ACPI_OBJECT_COMMON_HEADER
    287     UINT8                           MethodFlags;
    288     UINT8                           ParamCount;
    289     UINT8                           SyncLevel;
    290     union acpi_operand_object       *Mutex;
    291     UINT8                           *AmlStart;
    292     union
    293     {
    294         ACPI_INTERNAL_METHOD            Implementation;
    295         union acpi_operand_object       *Handler;
    296     } Extra;
    297 
    298     UINT32                          AmlLength;
    299     UINT8                           ThreadCount;
    300     ACPI_OWNER_ID                   OwnerId;
    301 
    302 } ACPI_OBJECT_METHOD;
    303 
    304 
    305 /******************************************************************************
    306  *
    307  * Objects that can be notified.  All share a common NotifyInfo area.
    308  *
    309  *****************************************************************************/
    310 
    311 /*
    312  * Common fields for objects that support ASL notifications
    313  */
    314 #define ACPI_COMMON_NOTIFY_INFO \
    315     union acpi_operand_object       *SystemNotify;      /* Handler for system notifies */\
    316     union acpi_operand_object       *DeviceNotify;      /* Handler for driver notifies */\
    317     union acpi_operand_object       *Handler;           /* Handler for Address space */
    318 
    319 
    320 typedef struct acpi_object_notify_common    /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
    321 {
    322     ACPI_OBJECT_COMMON_HEADER
    323     ACPI_COMMON_NOTIFY_INFO
    324 
    325 } ACPI_OBJECT_NOTIFY_COMMON;
    326 
    327 
    328 typedef struct acpi_object_device
    329 {
    330     ACPI_OBJECT_COMMON_HEADER
    331     ACPI_COMMON_NOTIFY_INFO
    332     ACPI_GPE_BLOCK_INFO             *GpeBlock;
    333 
    334 } ACPI_OBJECT_DEVICE;
    335 
    336 
    337 typedef struct acpi_object_power_resource
    338 {
    339     ACPI_OBJECT_COMMON_HEADER
    340     ACPI_COMMON_NOTIFY_INFO
    341     UINT32                          SystemLevel;
    342     UINT32                          ResourceOrder;
    343 
    344 } ACPI_OBJECT_POWER_RESOURCE;
    345 
    346 
    347 typedef struct acpi_object_processor
    348 {
    349     ACPI_OBJECT_COMMON_HEADER
    350 
    351     /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
    352 
    353     UINT8                           ProcId;
    354     UINT8                           Length;
    355     ACPI_COMMON_NOTIFY_INFO
    356     ACPI_IO_ADDRESS                 Address;
    357 
    358 } ACPI_OBJECT_PROCESSOR;
    359 
    360 
    361 typedef struct acpi_object_thermal_zone
    362 {
    363     ACPI_OBJECT_COMMON_HEADER
    364     ACPI_COMMON_NOTIFY_INFO
    365 
    366 } ACPI_OBJECT_THERMAL_ZONE;
    367 
    368 
    369 /******************************************************************************
    370  *
    371  * Fields.  All share a common header/info field.
    372  *
    373  *****************************************************************************/
    374 
    375 /*
    376  * Common bitfield for the field objects
    377  * "Field Datum"  -- a datum from the actual field object
    378  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
    379  */
    380 #define ACPI_COMMON_FIELD_INFO \
    381     UINT8                           FieldFlags;         /* Access, update, and lock bits */\
    382     UINT8                           Attribute;          /* From AccessAs keyword */\
    383     UINT8                           AccessByteWidth;    /* Read/Write size in bytes */\
    384     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */\
    385     UINT32                          BitLength;          /* Length of field in bits */\
    386     UINT32                          BaseByteOffset;     /* Byte offset within containing object */\
    387     UINT32                          Value;              /* Value to store into the Bank or Index register */\
    388     UINT8                           StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
    389 
    390 
    391 typedef struct acpi_object_field_common                 /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
    392 {
    393     ACPI_OBJECT_COMMON_HEADER
    394     ACPI_COMMON_FIELD_INFO
    395     union acpi_operand_object       *RegionObj;         /* Parent Operation Region object (REGION/BANK fields only) */
    396 
    397 } ACPI_OBJECT_FIELD_COMMON;
    398 
    399 
    400 typedef struct acpi_object_region_field
    401 {
    402     ACPI_OBJECT_COMMON_HEADER
    403     ACPI_COMMON_FIELD_INFO
    404     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
    405 
    406 } ACPI_OBJECT_REGION_FIELD;
    407 
    408 
    409 typedef struct acpi_object_bank_field
    410 {
    411     ACPI_OBJECT_COMMON_HEADER
    412     ACPI_COMMON_FIELD_INFO
    413     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
    414     union acpi_operand_object       *BankObj;           /* BankSelect Register object */
    415 
    416 } ACPI_OBJECT_BANK_FIELD;
    417 
    418 
    419 typedef struct acpi_object_index_field
    420 {
    421     ACPI_OBJECT_COMMON_HEADER
    422     ACPI_COMMON_FIELD_INFO
    423 
    424     /*
    425      * No "RegionObj" pointer needed since the Index and Data registers
    426      * are each field definitions unto themselves.
    427      */
    428     union acpi_operand_object       *IndexObj;          /* Index register */
    429     union acpi_operand_object       *DataObj;           /* Data register */
    430 
    431 } ACPI_OBJECT_INDEX_FIELD;
    432 
    433 
    434 /* The BufferField is different in that it is part of a Buffer, not an OpRegion */
    435 
    436 typedef struct acpi_object_buffer_field
    437 {
    438     ACPI_OBJECT_COMMON_HEADER
    439     ACPI_COMMON_FIELD_INFO
    440     union acpi_operand_object       *BufferObj;         /* Containing Buffer object */
    441 
    442 } ACPI_OBJECT_BUFFER_FIELD;
    443 
    444 
    445 /******************************************************************************
    446  *
    447  * Objects for handlers
    448  *
    449  *****************************************************************************/
    450 
    451 typedef struct acpi_object_notify_handler
    452 {
    453     ACPI_OBJECT_COMMON_HEADER
    454     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
    455     ACPI_NOTIFY_HANDLER             Handler;
    456     void                            *Context;
    457 
    458 } ACPI_OBJECT_NOTIFY_HANDLER;
    459 
    460 
    461 typedef struct acpi_object_addr_handler
    462 {
    463     ACPI_OBJECT_COMMON_HEADER
    464     UINT8                           SpaceId;
    465     UINT8                           HandlerFlags;
    466     ACPI_ADR_SPACE_HANDLER          Handler;
    467     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
    468     void                            *Context;
    469     ACPI_ADR_SPACE_SETUP            Setup;
    470     union acpi_operand_object       *RegionList;        /* regions using this handler */
    471     union acpi_operand_object       *Next;
    472 
    473 } ACPI_OBJECT_ADDR_HANDLER;
    474 
    475 /* Flags for address handler (HandlerFlags) */
    476 
    477 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
    478 
    479 
    480 /******************************************************************************
    481  *
    482  * Special internal objects
    483  *
    484  *****************************************************************************/
    485 
    486 /*
    487  * The Reference object is used for these opcodes:
    488  * Arg[0-6], Local[0-7], IndexOp, NameOp, RefOfOp, LoadOp, LoadTableOp, DebugOp
    489  * The Reference.Class differentiates these types.
    490  */
    491 typedef struct acpi_object_reference
    492 {
    493     ACPI_OBJECT_COMMON_HEADER
    494      UINT8                           Class;              /* Reference Class */
    495      UINT8                           TargetType;         /* Used for Index Op */
    496      UINT8                           Reserved;
    497      void                            *Object;            /* NameOp=>HANDLE to obj, IndexOp=>ACPI_OPERAND_OBJECT */
    498      ACPI_NAMESPACE_NODE             *Node;              /* RefOf or Namepath */
    499      union acpi_operand_object       **Where;            /* Target of Index */
    500      UINT32                          Value;              /* Used for Local/Arg/Index/DdbHandle */
    501 
    502 } ACPI_OBJECT_REFERENCE;
    503 
    504 /* Values for Reference.Class above */
    505 
    506 typedef enum
    507 {
    508     ACPI_REFCLASS_LOCAL             = 0,        /* Method local */
    509     ACPI_REFCLASS_ARG               = 1,        /* Method argument */
    510     ACPI_REFCLASS_REFOF             = 2,        /* Result of RefOf() TBD: Split to Ref/Node and Ref/OperandObj? */
    511     ACPI_REFCLASS_INDEX             = 3,        /* Result of Index() */
    512     ACPI_REFCLASS_TABLE             = 4,        /* DdbHandle - Load(), LoadTable() */
    513     ACPI_REFCLASS_NAME              = 5,        /* Reference to a named object */
    514     ACPI_REFCLASS_DEBUG             = 6,        /* Debug object */
    515 
    516     ACPI_REFCLASS_MAX               = 6
    517 
    518 } ACPI_REFERENCE_CLASSES;
    519 
    520 
    521 /*
    522  * Extra object is used as additional storage for types that
    523  * have AML code in their declarations (TermArgs) that must be
    524  * evaluated at run time.
    525  *
    526  * Currently: Region and FieldUnit types
    527  */
    528 typedef struct acpi_object_extra
    529 {
    530     ACPI_OBJECT_COMMON_HEADER
    531     ACPI_NAMESPACE_NODE             *Method_REG;        /* _REG method for this region (if any) */
    532     void                            *RegionContext;     /* Region-specific data */
    533     UINT8                           *AmlStart;
    534     UINT32                          AmlLength;
    535 
    536 } ACPI_OBJECT_EXTRA;
    537 
    538 
    539 /* Additional data that can be attached to namespace nodes */
    540 
    541 typedef struct acpi_object_data
    542 {
    543     ACPI_OBJECT_COMMON_HEADER
    544     ACPI_OBJECT_HANDLER             Handler;
    545     void                            *Pointer;
    546 
    547 } ACPI_OBJECT_DATA;
    548 
    549 
    550 /* Structure used when objects are cached for reuse */
    551 
    552 typedef struct acpi_object_cache_list
    553 {
    554     ACPI_OBJECT_COMMON_HEADER
    555     union acpi_operand_object       *Next;              /* Link for object cache and internal lists*/
    556 
    557 } ACPI_OBJECT_CACHE_LIST;
    558 
    559 
    560 /******************************************************************************
    561  *
    562  * ACPI_OPERAND_OBJECT Descriptor - a giant union of all of the above
    563  *
    564  *****************************************************************************/
    565 
    566 typedef union acpi_operand_object
    567 {
    568     ACPI_OBJECT_COMMON                  Common;
    569     ACPI_OBJECT_INTEGER                 Integer;
    570     ACPI_OBJECT_STRING                  String;
    571     ACPI_OBJECT_BUFFER                  Buffer;
    572     ACPI_OBJECT_PACKAGE                 Package;
    573     ACPI_OBJECT_EVENT                   Event;
    574     ACPI_OBJECT_METHOD                  Method;
    575     ACPI_OBJECT_MUTEX                   Mutex;
    576     ACPI_OBJECT_REGION                  Region;
    577     ACPI_OBJECT_NOTIFY_COMMON           CommonNotify;
    578     ACPI_OBJECT_DEVICE                  Device;
    579     ACPI_OBJECT_POWER_RESOURCE          PowerResource;
    580     ACPI_OBJECT_PROCESSOR               Processor;
    581     ACPI_OBJECT_THERMAL_ZONE            ThermalZone;
    582     ACPI_OBJECT_FIELD_COMMON            CommonField;
    583     ACPI_OBJECT_REGION_FIELD            Field;
    584     ACPI_OBJECT_BUFFER_FIELD            BufferField;
    585     ACPI_OBJECT_BANK_FIELD              BankField;
    586     ACPI_OBJECT_INDEX_FIELD             IndexField;
    587     ACPI_OBJECT_NOTIFY_HANDLER          Notify;
    588     ACPI_OBJECT_ADDR_HANDLER            AddressSpace;
    589     ACPI_OBJECT_REFERENCE               Reference;
    590     ACPI_OBJECT_EXTRA                   Extra;
    591     ACPI_OBJECT_DATA                    Data;
    592     ACPI_OBJECT_CACHE_LIST              Cache;
    593 
    594     /*
    595      * Add namespace node to union in order to simplify code that accepts both
    596      * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
    597      * a common DescriptorType field in order to differentiate them.
    598      */
    599     ACPI_NAMESPACE_NODE                 Node;
    600 
    601 } ACPI_OPERAND_OBJECT;
    602 
    603 
    604 /******************************************************************************
    605  *
    606  * ACPI_DESCRIPTOR - objects that share a common descriptor identifier
    607  *
    608  *****************************************************************************/
    609 
    610 /* Object descriptor types */
    611 
    612 #define ACPI_DESC_TYPE_CACHED           0x01        /* Used only when object is cached */
    613 #define ACPI_DESC_TYPE_STATE            0x02
    614 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
    615 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
    616 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
    617 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
    618 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
    619 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
    620 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
    621 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
    622 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
    623 #define ACPI_DESC_TYPE_WALK             0x0C
    624 #define ACPI_DESC_TYPE_PARSER           0x0D
    625 #define ACPI_DESC_TYPE_OPERAND          0x0E
    626 #define ACPI_DESC_TYPE_NAMED            0x0F
    627 #define ACPI_DESC_TYPE_MAX              0x0F
    628 
    629 
    630 typedef struct acpi_common_descriptor
    631 {
    632     void                            *CommonPointer;
    633     UINT8                           DescriptorType; /* To differentiate various internal objs */
    634 
    635 } ACPI_COMMON_DESCRIPTOR;
    636 
    637 typedef union acpi_descriptor
    638 {
    639     ACPI_COMMON_DESCRIPTOR          Common;
    640     ACPI_OPERAND_OBJECT             Object;
    641     ACPI_NAMESPACE_NODE             Node;
    642     ACPI_PARSE_OBJECT               Op;
    643 
    644 } ACPI_DESCRIPTOR;
    645 
    646 #pragma pack()
    647 
    648 #endif /* _ACOBJECT_H */
    649