sys/contrib/dev/acpica/source/include/acobject.h

   1 /******************************************************************************
   2  *
   3  * Name: acobject.h - Definition of ACPI_OPERAND_OBJECT  (Internal object only)
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2014, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #ifndef _ACOBJECT_H
  45 #define _ACOBJECT_H
  46
  47 #pragma pack(push) /* Set default struct packing */
  48
  49 /* acpisrc:StructDefs -- for acpisrc conversion */
  50
  51
  52 /*
  53  * The ACPI_OPERAND_OBJECT is used to pass AML operands from the dispatcher
  54  * to the interpreter, and to keep track of the various handlers such as
  55  * address space handlers and notify handlers. The object is a constant
  56  * size in order to allow it to be cached and reused.
  57  *
  58  * Note: The object is optimized to be aligned and will not work if it is
  59  * byte-packed.
  60  */
  61 #if ACPI_MACHINE_WIDTH == 64
  62 #pragma pack(8)
  63 #else
  64 #pragma pack(4)
  65 #endif
  66
  67 /*******************************************************************************
  68  *
  69  * Common Descriptors
  70  *
  71  ******************************************************************************/
  72
  73 /*
  74  * Common area for all objects.
  75  *
  76  * DescriptorType is used to differentiate between internal descriptors, and
  77  * must be in the same place across all descriptors
  78  *
  79  * Note: The DescriptorType and Type fields must appear in the identical
  80  * position in both the ACPI_NAMESPACE_NODE and ACPI_OPERAND_OBJECT
  81  * structures.
  82  */
  83 #define ACPI_OBJECT_COMMON_HEADER \
  84     union acpi_operand_object       *NextObject;        /* Objects linked to parent NS node */\
  85     UINT8                           DescriptorType;     /* To differentiate various internal objs */\
  86     UINT8                           Type;               /* ACPI_OBJECT_TYPE */\
  87     UINT16                          ReferenceCount;     /* For object deletion management */\
  88     UINT8                           Flags;
  89     /*
  90      * Note: There are 3 bytes available here before the
  91      * next natural alignment boundary (for both 32/64 cases)
  92      */
  93
  94 /* Values for Flag byte above */
  95
  96 #define AOPOBJ_AML_CONSTANT         0x01    /* Integer is an AML constant */
  97 #define AOPOBJ_STATIC_POINTER       0x02    /* Data is part of an ACPI table, don't delete */
  98 #define AOPOBJ_DATA_VALID           0x04    /* Object is initialized and data is valid */
  99 #define AOPOBJ_OBJECT_INITIALIZED   0x08    /* Region is initialized, _REG was run */
 100 #define AOPOBJ_SETUP_COMPLETE       0x10    /* Region setup is complete */
 101 #define AOPOBJ_INVALID              0x20    /* Host OS won't allow a Region address */
 102
 103
 104 /******************************************************************************
 105  *
 106  * Basic data types
 107  *
 108  *****************************************************************************/
 109
 110 typedef struct acpi_object_common
 111 {
 112     ACPI_OBJECT_COMMON_HEADER
 113
 114 } ACPI_OBJECT_COMMON;
 115
 116
 117 typedef struct acpi_object_integer
 118 {
 119     ACPI_OBJECT_COMMON_HEADER
 120     UINT8                           Fill[3];            /* Prevent warning on some compilers */
 121     UINT64                          Value;
 122
 123 } ACPI_OBJECT_INTEGER;
 124
 125
 126 /*
 127  * Note: The String and Buffer object must be identical through the
 128  * pointer and length elements. There is code that depends on this.
 129  *
 130  * Fields common to both Strings and Buffers
 131  */
 132 #define ACPI_COMMON_BUFFER_INFO(_Type) \
 133     _Type                           *Pointer; \
 134     UINT32                          Length;
 135
 136
 137 typedef struct acpi_object_string   /* Null terminated, ASCII characters only */
 138 {
 139     ACPI_OBJECT_COMMON_HEADER
 140     ACPI_COMMON_BUFFER_INFO         (char)              /* String in AML stream or allocated string */
 141
 142 } ACPI_OBJECT_STRING;
 143
 144
 145 typedef struct acpi_object_buffer
 146 {
 147     ACPI_OBJECT_COMMON_HEADER
 148     ACPI_COMMON_BUFFER_INFO         (UINT8)             /* Buffer in AML stream or allocated buffer */
 149     UINT32                          AmlLength;
 150     UINT8                           *AmlStart;
 151     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
 152
 153 } ACPI_OBJECT_BUFFER;
 154
 155
 156 typedef struct acpi_object_package
 157 {
 158     ACPI_OBJECT_COMMON_HEADER
 159     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
 160     union acpi_operand_object       **Elements;         /* Array of pointers to AcpiObjects */
 161     UINT8                           *AmlStart;
 162     UINT32                          AmlLength;
 163     UINT32                          Count;              /* # of elements in package */
 164
 165 } ACPI_OBJECT_PACKAGE;
 166
 167
 168 /******************************************************************************
 169  *
 170  * Complex data types
 171  *
 172  *****************************************************************************/
 173
 174 typedef struct acpi_object_event
 175 {
 176     ACPI_OBJECT_COMMON_HEADER
 177     ACPI_SEMAPHORE                  OsSemaphore;        /* Actual OS synchronization object */
 178
 179 } ACPI_OBJECT_EVENT;
 180
 181
 182 typedef struct acpi_object_mutex
 183 {
 184     ACPI_OBJECT_COMMON_HEADER
 185     UINT8                           SyncLevel;          /* 0-15, specified in Mutex() call */
 186     UINT16                          AcquisitionDepth;   /* Allow multiple Acquires, same thread */
 187     ACPI_MUTEX                      OsMutex;            /* Actual OS synchronization object */
 188     ACPI_THREAD_ID                  ThreadId;           /* Current owner of the mutex */
 189     struct acpi_thread_state        *OwnerThread;       /* Current owner of the mutex */
 190     union acpi_operand_object       *Prev;              /* Link for list of acquired mutexes */
 191     union acpi_operand_object       *Next;              /* Link for list of acquired mutexes */
 192     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
 193     UINT8                           OriginalSyncLevel;  /* Owner's original sync level (0-15) */
 194
 195 } ACPI_OBJECT_MUTEX;
 196
 197
 198 typedef struct acpi_object_region
 199 {
 200     ACPI_OBJECT_COMMON_HEADER
 201     UINT8                           SpaceId;
 202     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
 203     union acpi_operand_object       *Handler;           /* Handler for region access */
 204     union acpi_operand_object       *Next;
 205     ACPI_PHYSICAL_ADDRESS           Address;
 206     UINT32                          Length;
 207
 208 } ACPI_OBJECT_REGION;
 209
 210
 211 typedef struct acpi_object_method
 212 {
 213     ACPI_OBJECT_COMMON_HEADER
 214     UINT8                           InfoFlags;
 215     UINT8                           ParamCount;
 216     UINT8                           SyncLevel;
 217     union acpi_operand_object       *Mutex;
 218     UINT8                           *AmlStart;
 219     union
 220     {
 221         ACPI_INTERNAL_METHOD            Implementation;
 222         union acpi_operand_object       *Handler;
 223     } Dispatch;
 224
 225     UINT32                          AmlLength;
 226     UINT8                           ThreadCount;
 227     ACPI_OWNER_ID                   OwnerId;
 228
 229 } ACPI_OBJECT_METHOD;
 230
 231 /* Flags for InfoFlags field above */
 232
 233 #define ACPI_METHOD_MODULE_LEVEL        0x01    /* Method is actually module-level code */
 234 #define ACPI_METHOD_INTERNAL_ONLY       0x02    /* Method is implemented internally (_OSI) */
 235 #define ACPI_METHOD_SERIALIZED          0x04    /* Method is serialized */
 236 #define ACPI_METHOD_SERIALIZED_PENDING  0x08    /* Method is to be marked serialized */
 237 #define ACPI_METHOD_MODIFIED_NAMESPACE  0x10    /* Method modified the namespace */
 238
 239
 240 /******************************************************************************
 241  *
 242  * Objects that can be notified. All share a common NotifyInfo area.
 243  *
 244  *****************************************************************************/
 245
 246 /*
 247  * Common fields for objects that support ASL notifications
 248  */
 249 #define ACPI_COMMON_NOTIFY_INFO \
 250     union acpi_operand_object       *NotifyList[2];     /* Handlers for system/device notifies */\
 251     union acpi_operand_object       *Handler;           /* Handler for Address space */
 252
 253
 254 typedef struct acpi_object_notify_common    /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 255 {
 256     ACPI_OBJECT_COMMON_HEADER
 257     ACPI_COMMON_NOTIFY_INFO
 258
 259 } ACPI_OBJECT_NOTIFY_COMMON;
 260
 261
 262 typedef struct acpi_object_device
 263 {
 264     ACPI_OBJECT_COMMON_HEADER
 265     ACPI_COMMON_NOTIFY_INFO
 266     ACPI_GPE_BLOCK_INFO             *GpeBlock;
 267
 268 } ACPI_OBJECT_DEVICE;
 269
 270
 271 typedef struct acpi_object_power_resource
 272 {
 273     ACPI_OBJECT_COMMON_HEADER
 274     ACPI_COMMON_NOTIFY_INFO
 275     UINT32                          SystemLevel;
 276     UINT32                          ResourceOrder;
 277
 278 } ACPI_OBJECT_POWER_RESOURCE;
 279
 280
 281 typedef struct acpi_object_processor
 282 {
 283     ACPI_OBJECT_COMMON_HEADER
 284
 285     /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
 286
 287     UINT8                           ProcId;
 288     UINT8                           Length;
 289     ACPI_COMMON_NOTIFY_INFO
 290     ACPI_IO_ADDRESS                 Address;
 291
 292 } ACPI_OBJECT_PROCESSOR;
 293
 294
 295 typedef struct acpi_object_thermal_zone
 296 {
 297     ACPI_OBJECT_COMMON_HEADER
 298     ACPI_COMMON_NOTIFY_INFO
 299
 300 } ACPI_OBJECT_THERMAL_ZONE;
 301
 302
 303 /******************************************************************************
 304  *
 305  * Fields. All share a common header/info field.
 306  *
 307  *****************************************************************************/
 308
 309 /*
 310  * Common bitfield for the field objects
 311  * "Field Datum"  -- a datum from the actual field object
 312  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 313  */
 314 #define ACPI_COMMON_FIELD_INFO \
 315     UINT8                           FieldFlags;         /* Access, update, and lock bits */\
 316     UINT8                           Attribute;          /* From AccessAs keyword */\
 317     UINT8                           AccessByteWidth;    /* Read/Write size in bytes */\
 318     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */\
 319     UINT32                          BitLength;          /* Length of field in bits */\
 320     UINT32                          BaseByteOffset;     /* Byte offset within containing object */\
 321     UINT32                          Value;              /* Value to store into the Bank or Index register */\
 322     UINT8                           StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
 323     UINT8                           AccessLength;       /* For serial regions/fields */
 324
 325
 326 typedef struct acpi_object_field_common                 /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 327 {
 328     ACPI_OBJECT_COMMON_HEADER
 329     ACPI_COMMON_FIELD_INFO
 330     union acpi_operand_object       *RegionObj;         /* Parent Operation Region object (REGION/BANK fields only) */
 331
 332 } ACPI_OBJECT_FIELD_COMMON;
 333
 334
 335 typedef struct acpi_object_region_field
 336 {
 337     ACPI_OBJECT_COMMON_HEADER
 338     ACPI_COMMON_FIELD_INFO
 339     UINT16                          ResourceLength;
 340     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
 341     UINT8                           *ResourceBuffer;    /* ResourceTemplate for serial regions/fields */
 342
 343 } ACPI_OBJECT_REGION_FIELD;
 344
 345
 346 typedef struct acpi_object_bank_field
 347 {
 348     ACPI_OBJECT_COMMON_HEADER
 349     ACPI_COMMON_FIELD_INFO
 350     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
 351     union acpi_operand_object       *BankObj;           /* BankSelect Register object */
 352
 353 } ACPI_OBJECT_BANK_FIELD;
 354
 355
 356 typedef struct acpi_object_index_field
 357 {
 358     ACPI_OBJECT_COMMON_HEADER
 359     ACPI_COMMON_FIELD_INFO
 360
 361     /*
 362      * No "RegionObj" pointer needed since the Index and Data registers
 363      * are each field definitions unto themselves.
 364      */
 365     union acpi_operand_object       *IndexObj;          /* Index register */
 366     union acpi_operand_object       *DataObj;           /* Data register */
 367
 368 } ACPI_OBJECT_INDEX_FIELD;
 369
 370
 371 /* The BufferField is different in that it is part of a Buffer, not an OpRegion */
 372
 373 typedef struct acpi_object_buffer_field
 374 {
 375     ACPI_OBJECT_COMMON_HEADER
 376     ACPI_COMMON_FIELD_INFO
 377     union acpi_operand_object       *BufferObj;         /* Containing Buffer object */
 378
 379 } ACPI_OBJECT_BUFFER_FIELD;
 380
 381
 382 /******************************************************************************
 383  *
 384  * Objects for handlers
 385  *
 386  *****************************************************************************/
 387
 388 typedef struct acpi_object_notify_handler
 389 {
 390     ACPI_OBJECT_COMMON_HEADER
 391     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
 392     UINT32                          HandlerType;        /* Type: Device/System/Both */
 393     ACPI_NOTIFY_HANDLER             Handler;            /* Handler address */
 394     void                            *Context;
 395     union acpi_operand_object       *Next[2];           /* Device and System handler lists */
 396
 397 } ACPI_OBJECT_NOTIFY_HANDLER;
 398
 399
 400 typedef struct acpi_object_addr_handler
 401 {
 402     ACPI_OBJECT_COMMON_HEADER
 403     UINT8                           SpaceId;
 404     UINT8                           HandlerFlags;
 405     ACPI_ADR_SPACE_HANDLER          Handler;
 406     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
 407     void                            *Context;
 408     ACPI_ADR_SPACE_SETUP            Setup;
 409     union acpi_operand_object       *RegionList;        /* Regions using this handler */
 410     union acpi_operand_object       *Next;
 411
 412 } ACPI_OBJECT_ADDR_HANDLER;
 413
 414 /* Flags for address handler (HandlerFlags) */
 415
 416 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 417
 418
 419 /******************************************************************************
 420  *
 421  * Special internal objects
 422  *
 423  *****************************************************************************/
 424
 425 /*
 426  * The Reference object is used for these opcodes:
 427  * Arg[0-6], Local[0-7], IndexOp, NameOp, RefOfOp, LoadOp, LoadTableOp, DebugOp
 428  * The Reference.Class differentiates these types.
 429  */
 430 typedef struct acpi_object_reference
 431 {
 432     ACPI_OBJECT_COMMON_HEADER
 433      UINT8                           Class;              /* Reference Class */
 434      UINT8                           TargetType;         /* Used for Index Op */
 435      UINT8                           Reserved;
 436      void                            *Object;            /* NameOp=>HANDLE to obj, IndexOp=>ACPI_OPERAND_OBJECT */
 437      ACPI_NAMESPACE_NODE             *Node;              /* RefOf or Namepath */
 438      union acpi_operand_object       **Where;            /* Target of Index */
 439      UINT32                          Value;              /* Used for Local/Arg/Index/DdbHandle */
 440
 441 } ACPI_OBJECT_REFERENCE;
 442
 443 /* Values for Reference.Class above */
 444
 445 typedef enum
 446 {
 447     ACPI_REFCLASS_LOCAL             = 0,        /* Method local */
 448     ACPI_REFCLASS_ARG               = 1,        /* Method argument */
 449     ACPI_REFCLASS_REFOF             = 2,        /* Result of RefOf() TBD: Split to Ref/Node and Ref/OperandObj? */
 450     ACPI_REFCLASS_INDEX             = 3,        /* Result of Index() */
 451     ACPI_REFCLASS_TABLE             = 4,        /* DdbHandle - Load(), LoadTable() */
 452     ACPI_REFCLASS_NAME              = 5,        /* Reference to a named object */
 453     ACPI_REFCLASS_DEBUG             = 6,        /* Debug object */
 454
 455     ACPI_REFCLASS_MAX               = 6
 456
 457 } ACPI_REFERENCE_CLASSES;
 458
 459
 460 /*
 461  * Extra object is used as additional storage for types that
 462  * have AML code in their declarations (TermArgs) that must be
 463  * evaluated at run time.
 464  *
 465  * Currently: Region and FieldUnit types
 466  */
 467 typedef struct acpi_object_extra
 468 {
 469     ACPI_OBJECT_COMMON_HEADER
 470     ACPI_NAMESPACE_NODE             *Method_REG;        /* _REG method for this region (if any) */
 471     ACPI_NAMESPACE_NODE             *ScopeNode;
 472     void                            *RegionContext;     /* Region-specific data */
 473     UINT8                           *AmlStart;
 474     UINT32                          AmlLength;
 475
 476 } ACPI_OBJECT_EXTRA;
 477
 478
 479 /* Additional data that can be attached to namespace nodes */
 480
 481 typedef struct acpi_object_data
 482 {
 483     ACPI_OBJECT_COMMON_HEADER
 484     ACPI_OBJECT_HANDLER             Handler;
 485     void                            *Pointer;
 486
 487 } ACPI_OBJECT_DATA;
 488
 489
 490 /* Structure used when objects are cached for reuse */
 491
 492 typedef struct acpi_object_cache_list
 493 {
 494     ACPI_OBJECT_COMMON_HEADER
 495     union acpi_operand_object       *Next;              /* Link for object cache and internal lists*/
 496
 497 } ACPI_OBJECT_CACHE_LIST;
 498
 499
 500 /******************************************************************************
 501  *
 502  * ACPI_OPERAND_OBJECT Descriptor - a giant union of all of the above
 503  *
 504  *****************************************************************************/
 505
 506 typedef union acpi_operand_object
 507 {
 508     ACPI_OBJECT_COMMON                  Common;
 509     ACPI_OBJECT_INTEGER                 Integer;
 510     ACPI_OBJECT_STRING                  String;
 511     ACPI_OBJECT_BUFFER                  Buffer;
 512     ACPI_OBJECT_PACKAGE                 Package;
 513     ACPI_OBJECT_EVENT                   Event;
 514     ACPI_OBJECT_METHOD                  Method;
 515     ACPI_OBJECT_MUTEX                   Mutex;
 516     ACPI_OBJECT_REGION                  Region;
 517     ACPI_OBJECT_NOTIFY_COMMON           CommonNotify;
 518     ACPI_OBJECT_DEVICE                  Device;
 519     ACPI_OBJECT_POWER_RESOURCE          PowerResource;
 520     ACPI_OBJECT_PROCESSOR               Processor;
 521     ACPI_OBJECT_THERMAL_ZONE            ThermalZone;
 522     ACPI_OBJECT_FIELD_COMMON            CommonField;
 523     ACPI_OBJECT_REGION_FIELD            Field;
 524     ACPI_OBJECT_BUFFER_FIELD            BufferField;
 525     ACPI_OBJECT_BANK_FIELD              BankField;
 526     ACPI_OBJECT_INDEX_FIELD             IndexField;
 527     ACPI_OBJECT_NOTIFY_HANDLER          Notify;
 528     ACPI_OBJECT_ADDR_HANDLER            AddressSpace;
 529     ACPI_OBJECT_REFERENCE               Reference;
 530     ACPI_OBJECT_EXTRA                   Extra;
 531     ACPI_OBJECT_DATA                    Data;
 532     ACPI_OBJECT_CACHE_LIST              Cache;
 533
 534     /*
 535      * Add namespace node to union in order to simplify code that accepts both
 536      * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
 537      * a common DescriptorType field in order to differentiate them.
 538      */
 539     ACPI_NAMESPACE_NODE                 Node;
 540
 541 } ACPI_OPERAND_OBJECT;
 542
 543
 544 /******************************************************************************
 545  *
 546  * ACPI_DESCRIPTOR - objects that share a common descriptor identifier
 547  *
 548  *****************************************************************************/
 549
 550 /* Object descriptor types */
 551
 552 #define ACPI_DESC_TYPE_CACHED           0x01        /* Used only when object is cached */
 553 #define ACPI_DESC_TYPE_STATE            0x02
 554 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 555 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 556 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 557 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 558 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 559 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 560 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 561 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 562 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 563 #define ACPI_DESC_TYPE_WALK             0x0C
 564 #define ACPI_DESC_TYPE_PARSER           0x0D
 565 #define ACPI_DESC_TYPE_OPERAND          0x0E
 566 #define ACPI_DESC_TYPE_NAMED            0x0F
 567 #define ACPI_DESC_TYPE_MAX              0x0F
 568
 569
 570 typedef struct acpi_common_descriptor
 571 {
 572     void                            *CommonPointer;
 573     UINT8                           DescriptorType; /* To differentiate various internal objs */
 574
 575 } ACPI_COMMON_DESCRIPTOR;
 576
 577 typedef union acpi_descriptor
 578 {
 579     ACPI_COMMON_DESCRIPTOR          Common;
 580     ACPI_OPERAND_OBJECT             Object;
 581     ACPI_NAMESPACE_NODE             Node;
 582     ACPI_PARSE_OBJECT               Op;
 583
 584 } ACPI_DESCRIPTOR;
 585
 586 #pragma pack(pop) /* Restore original struct packing */
 587
 588 #endif /* _ACOBJECT_H */