arch/x86/include/sys/acpi/acobject.h

   1 /******************************************************************************
   2  *
   3  * Name: acobject.h - Definition of ACPI_OPERAND_OBJECT  (Internal object only)
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2016, 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 /* acpisrc:StructDefs -- for acpisrc conversion */
  48
  49
  50 /*
  51  * The ACPI_OPERAND_OBJECT is used to pass AML operands from the dispatcher
  52  * to the interpreter, and to keep track of the various handlers such as
  53  * address space handlers and notify handlers. The object is a constant
  54  * size in order to allow it to be cached and reused.
  55  *
  56  * Note: The object is optimized to be aligned and will not work if it is
  57  * byte-packed.
  58  */
  59 #if ACPI_MACHINE_WIDTH == 64
  60 #pragma pack(8)
  61 #else
  62 #pragma pack(4)
  63 #endif
  64
  65 /*******************************************************************************
  66  *
  67  * Common Descriptors
  68  *
  69  ******************************************************************************/
  70
  71 /*
  72  * Common area for all objects.
  73  *
  74  * DescriptorType is used to differentiate between internal descriptors, and
  75  * must be in the same place across all descriptors
  76  *
  77  * Note: The DescriptorType and Type fields must appear in the identical
  78  * position in both the ACPI_NAMESPACE_NODE and ACPI_OPERAND_OBJECT
  79  * structures.
  80  */
  81 #define ACPI_OBJECT_COMMON_HEADER \
  82     union acpi_operand_object       *NextObject;        /* Objects linked to parent NS node */\
  83     UINT8                           DescriptorType;     /* To differentiate various internal objs */\
  84     UINT8                           Type;               /* ACPI_OBJECT_TYPE */\
  85     UINT16                          ReferenceCount;     /* For object deletion management */\
  86     UINT8                           Flags;
  87     /*
  88      * Note: There are 3 bytes available here before the
  89      * next natural alignment boundary (for both 32/64 cases)
  90      */
  91
  92 /* Values for Flag byte above */
  93
  94 #define AOPOBJ_AML_CONSTANT         0x01    /* Integer is an AML constant */
  95 #define AOPOBJ_STATIC_POINTER       0x02    /* Data is part of an ACPI table, don't delete */
  96 #define AOPOBJ_DATA_VALID           0x04    /* Object is initialized and data is valid */
  97 #define AOPOBJ_OBJECT_INITIALIZED   0x08    /* Region is initialized */
  98 #define AOPOBJ_REG_CONNECTED        0x10    /* _REG was run */
  99 #define AOPOBJ_SETUP_COMPLETE       0x20    /* Region setup is complete */
 100 #define AOPOBJ_INVALID              0x40    /* Host OS won't allow a Region address */
 101
 102
 103 /******************************************************************************
 104  *
 105  * Basic data types
 106  *
 107  *****************************************************************************/
 108
 109 typedef struct acpi_object_common
 110 {
 111     ACPI_OBJECT_COMMON_HEADER
 112
 113 } ACPI_OBJECT_COMMON;
 114
 115
 116 typedef struct acpi_object_integer
 117 {
 118     ACPI_OBJECT_COMMON_HEADER
 119     UINT8                           Fill[3];            /* Prevent warning on some compilers */
 120     UINT64                          Value;
 121
 122 } ACPI_OBJECT_INTEGER;
 123
 124
 125 /*
 126  * Note: The String and Buffer object must be identical through the
 127  * pointer and length elements. There is code that depends on this.
 128  *
 129  * Fields common to both Strings and Buffers
 130  */
 131 #define ACPI_COMMON_BUFFER_INFO(_Type) \
 132     _Type                           *Pointer; \
 133     UINT32                          Length;
 134
 135
 136 typedef struct acpi_object_string   /* Null terminated, ASCII characters only */
 137 {
 138     ACPI_OBJECT_COMMON_HEADER
 139     ACPI_COMMON_BUFFER_INFO         (char)              /* String in AML stream or allocated string */
 140
 141 } ACPI_OBJECT_STRING;
 142
 143
 144 typedef struct acpi_object_buffer
 145 {
 146     ACPI_OBJECT_COMMON_HEADER
 147     ACPI_COMMON_BUFFER_INFO         (UINT8)             /* Buffer in AML stream or allocated buffer */
 148     UINT32                          AmlLength;
 149     UINT8                           *AmlStart;
 150     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
 151
 152 } ACPI_OBJECT_BUFFER;
 153
 154
 155 typedef struct acpi_object_package
 156 {
 157     ACPI_OBJECT_COMMON_HEADER
 158     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
 159     union acpi_operand_object       **Elements;         /* Array of pointers to AcpiObjects */
 160     UINT8                           *AmlStart;
 161     UINT32                          AmlLength;
 162     UINT32                          Count;              /* # of elements in package */
 163
 164 } ACPI_OBJECT_PACKAGE;
 165
 166
 167 /******************************************************************************
 168  *
 169  * Complex data types
 170  *
 171  *****************************************************************************/
 172
 173 typedef struct acpi_object_event
 174 {
 175     ACPI_OBJECT_COMMON_HEADER
 176     ACPI_SEMAPHORE                  OsSemaphore;        /* Actual OS synchronization object */
 177
 178 } ACPI_OBJECT_EVENT;
 179
 180
 181 typedef struct acpi_object_mutex
 182 {
 183     ACPI_OBJECT_COMMON_HEADER
 184     UINT8                           SyncLevel;          /* 0-15, specified in Mutex() call */
 185     UINT16                          AcquisitionDepth;   /* Allow multiple Acquires, same thread */
 186     ACPI_MUTEX                      OsMutex;            /* Actual OS synchronization object */
 187     ACPI_THREAD_ID                  ThreadId;           /* Current owner of the mutex */
 188     struct acpi_thread_state        *OwnerThread;       /* Current owner of the mutex */
 189     union acpi_operand_object       *Prev;              /* Link for list of acquired mutexes */
 190     union acpi_operand_object       *Next;              /* Link for list of acquired mutexes */
 191     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
 192     UINT8                           OriginalSyncLevel;  /* Owner's original sync level (0-15) */
 193
 194 } ACPI_OBJECT_MUTEX;
 195
 196
 197 typedef struct acpi_object_region
 198 {
 199     ACPI_OBJECT_COMMON_HEADER
 200     UINT8                           SpaceId;
 201     ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
 202     union acpi_operand_object       *Handler;           /* Handler for region access */
 203     union acpi_operand_object       *Next;
 204     ACPI_PHYSICAL_ADDRESS           Address;
 205     UINT32                          Length;
 206
 207 } ACPI_OBJECT_REGION;
 208
 209
 210 typedef struct acpi_object_method
 211 {
 212     ACPI_OBJECT_COMMON_HEADER
 213     UINT8                           InfoFlags;
 214     UINT8                           ParamCount;
 215     UINT8                           SyncLevel;
 216     union acpi_operand_object       *Mutex;
 217     union acpi_operand_object       *Node;
 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_IGNORE_SYNC_LEVEL   0x10    /* Method was auto-serialized at table load time */
 238 #define ACPI_METHOD_MODIFIED_NAMESPACE  0x20    /* Method modified the namespace */
 239
 240
 241 /******************************************************************************
 242  *
 243  * Objects that can be notified. All share a common NotifyInfo area.
 244  *
 245  *****************************************************************************/
 246
 247 /*
 248  * Common fields for objects that support ASL notifications
 249  */
 250 #define ACPI_COMMON_NOTIFY_INFO \
 251     union acpi_operand_object       *NotifyList[2];     /* Handlers for system/device notifies */\
 252     union acpi_operand_object       *Handler;           /* Handler for Address space */
 253
 254
 255 typedef struct acpi_object_notify_common    /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 256 {
 257     ACPI_OBJECT_COMMON_HEADER
 258     ACPI_COMMON_NOTIFY_INFO
 259
 260 } ACPI_OBJECT_NOTIFY_COMMON;
 261
 262
 263 typedef struct acpi_object_device
 264 {
 265     ACPI_OBJECT_COMMON_HEADER
 266     ACPI_COMMON_NOTIFY_INFO
 267     ACPI_GPE_BLOCK_INFO             *GpeBlock;
 268
 269 } ACPI_OBJECT_DEVICE;
 270
 271
 272 typedef struct acpi_object_power_resource
 273 {
 274     ACPI_OBJECT_COMMON_HEADER
 275     ACPI_COMMON_NOTIFY_INFO
 276     UINT32                          SystemLevel;
 277     UINT32                          ResourceOrder;
 278
 279 } ACPI_OBJECT_POWER_RESOURCE;
 280
 281
 282 typedef struct acpi_object_processor
 283 {
 284     ACPI_OBJECT_COMMON_HEADER
 285
 286     /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
 287
 288     UINT8                           ProcId;
 289     UINT8                           Length;
 290     ACPI_COMMON_NOTIFY_INFO
 291     ACPI_IO_ADDRESS                 Address;
 292
 293 } ACPI_OBJECT_PROCESSOR;
 294
 295
 296 typedef struct acpi_object_thermal_zone
 297 {
 298     ACPI_OBJECT_COMMON_HEADER
 299     ACPI_COMMON_NOTIFY_INFO
 300
 301 } ACPI_OBJECT_THERMAL_ZONE;
 302
 303
 304 /******************************************************************************
 305  *
 306  * Fields. All share a common header/info field.
 307  *
 308  *****************************************************************************/
 309
 310 /*
 311  * Common bitfield for the field objects
 312  * "Field Datum"  -- a datum from the actual field object
 313  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 314  */
 315 #define ACPI_COMMON_FIELD_INFO \
 316     UINT8                           FieldFlags;         /* Access, update, and lock bits */\
 317     UINT8                           Attribute;          /* From AccessAs keyword */\
 318     UINT8                           AccessByteWidth;    /* Read/Write size in bytes */\
 319     ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */\
 320     UINT32                          BitLength;          /* Length of field in bits */\
 321     UINT32                          BaseByteOffset;     /* Byte offset within containing object */\
 322     UINT32                          Value;              /* Value to store into the Bank or Index register */\
 323     UINT8                           StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
 324     UINT8                           AccessLength;       /* For serial regions/fields */
 325
 326
 327 typedef struct acpi_object_field_common                 /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 328 {
 329     ACPI_OBJECT_COMMON_HEADER
 330     ACPI_COMMON_FIELD_INFO
 331     union acpi_operand_object       *RegionObj;         /* Parent Operation Region object (REGION/BANK fields only) */
 332
 333 } ACPI_OBJECT_FIELD_COMMON;
 334
 335
 336 typedef struct acpi_object_region_field
 337 {
 338     ACPI_OBJECT_COMMON_HEADER
 339     ACPI_COMMON_FIELD_INFO
 340     UINT16                          ResourceLength;
 341     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
 342     UINT8                           *ResourceBuffer;    /* ResourceTemplate for serial regions/fields */
 343     UINT16                          PinNumberIndex;     /* Index relative to previous Connection/Template */
 344
 345 } ACPI_OBJECT_REGION_FIELD;
 346
 347
 348 typedef struct acpi_object_bank_field
 349 {
 350     ACPI_OBJECT_COMMON_HEADER
 351     ACPI_COMMON_FIELD_INFO
 352     union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
 353     union acpi_operand_object       *BankObj;           /* BankSelect Register object */
 354
 355 } ACPI_OBJECT_BANK_FIELD;
 356
 357
 358 typedef struct acpi_object_index_field
 359 {
 360     ACPI_OBJECT_COMMON_HEADER
 361     ACPI_COMMON_FIELD_INFO
 362
 363     /*
 364      * No "RegionObj" pointer needed since the Index and Data registers
 365      * are each field definitions unto themselves.
 366      */
 367     union acpi_operand_object       *IndexObj;          /* Index register */
 368     union acpi_operand_object       *DataObj;           /* Data register */
 369
 370 } ACPI_OBJECT_INDEX_FIELD;
 371
 372
 373 /* The BufferField is different in that it is part of a Buffer, not an OpRegion */
 374
 375 typedef struct acpi_object_buffer_field
 376 {
 377     ACPI_OBJECT_COMMON_HEADER
 378     ACPI_COMMON_FIELD_INFO
 379     union acpi_operand_object       *BufferObj;         /* Containing Buffer object */
 380
 381 } ACPI_OBJECT_BUFFER_FIELD;
 382
 383
 384 /******************************************************************************
 385  *
 386  * Objects for handlers
 387  *
 388  *****************************************************************************/
 389
 390 typedef struct acpi_object_notify_handler
 391 {
 392     ACPI_OBJECT_COMMON_HEADER
 393     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
 394     UINT32                          HandlerType;        /* Type: Device/System/Both */
 395     ACPI_NOTIFY_HANDLER             Handler;            /* Handler address */
 396     void                            *Context;
 397     union acpi_operand_object       *Next[2];           /* Device and System handler lists */
 398
 399 } ACPI_OBJECT_NOTIFY_HANDLER;
 400
 401
 402 typedef struct acpi_object_addr_handler
 403 {
 404     ACPI_OBJECT_COMMON_HEADER
 405     UINT8                           SpaceId;
 406     UINT8                           HandlerFlags;
 407     ACPI_ADR_SPACE_HANDLER          Handler;
 408     ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
 409     void                            *Context;
 410     ACPI_ADR_SPACE_SETUP            Setup;
 411     union acpi_operand_object       *RegionList;        /* Regions using this handler */
 412     union acpi_operand_object       *Next;
 413
 414 } ACPI_OBJECT_ADDR_HANDLER;
 415
 416 /* Flags for address handler (HandlerFlags) */
 417
 418 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 419
 420
 421 /******************************************************************************
 422  *
 423  * Special internal objects
 424  *
 425  *****************************************************************************/
 426
 427 /*
 428  * The Reference object is used for these opcodes:
 429  * Arg[0-6], Local[0-7], IndexOp, NameOp, RefOfOp, LoadOp, LoadTableOp, DebugOp
 430  * The Reference.Class differentiates these types.
 431  */
 432 typedef struct acpi_object_reference
 433 {
 434     ACPI_OBJECT_COMMON_HEADER
 435     UINT8                           Class;              /* Reference Class */
 436     UINT8                           TargetType;         /* Used for Index Op */
 437     UINT8                           Reserved;
 438     void                            *Object;            /* NameOp=>HANDLE to obj, IndexOp=>ACPI_OPERAND_OBJECT */
 439     ACPI_NAMESPACE_NODE             *Node;              /* RefOf or Namepath */
 440     union acpi_operand_object       **Where;            /* Target of Index */
 441     UINT8                           *IndexPointer;      /* Used for Buffers and Strings */
 442     UINT32                          Value;              /* Used for Local/Arg/Index/DdbHandle */
 443
 444 } ACPI_OBJECT_REFERENCE;
 445
 446 /* Values for Reference.Class above */
 447
 448 typedef enum
 449 {
 450     ACPI_REFCLASS_LOCAL             = 0,        /* Method local */
 451     ACPI_REFCLASS_ARG               = 1,        /* Method argument */
 452     ACPI_REFCLASS_REFOF             = 2,        /* Result of RefOf() TBD: Split to Ref/Node and Ref/OperandObj? */
 453     ACPI_REFCLASS_INDEX             = 3,        /* Result of Index() */
 454     ACPI_REFCLASS_TABLE             = 4,        /* DdbHandle - Load(), LoadTable() */
 455     ACPI_REFCLASS_NAME              = 5,        /* Reference to a named object */
 456     ACPI_REFCLASS_DEBUG             = 6,        /* Debug object */
 457
 458     ACPI_REFCLASS_MAX               = 6
 459
 460 } ACPI_REFERENCE_CLASSES;
 461
 462
 463 /*
 464  * Extra object is used as additional storage for types that
 465  * have AML code in their declarations (TermArgs) that must be
 466  * evaluated at run time.
 467  *
 468  * Currently: Region and FieldUnit types
 469  */
 470 typedef struct acpi_object_extra
 471 {
 472     ACPI_OBJECT_COMMON_HEADER
 473     ACPI_NAMESPACE_NODE             *Method_REG;        /* _REG method for this region (if any) */
 474     ACPI_NAMESPACE_NODE             *ScopeNode;
 475     void                            *RegionContext;     /* Region-specific data */
 476     UINT8                           *AmlStart;
 477     UINT32                          AmlLength;
 478
 479 } ACPI_OBJECT_EXTRA;
 480
 481
 482 /* Additional data that can be attached to namespace nodes */
 483
 484 typedef struct acpi_object_data
 485 {
 486     ACPI_OBJECT_COMMON_HEADER
 487     ACPI_OBJECT_HANDLER             Handler;
 488     void                            *Pointer;
 489
 490 } ACPI_OBJECT_DATA;
 491
 492
 493 /* Structure used when objects are cached for reuse */
 494
 495 typedef struct acpi_object_cache_list
 496 {
 497     ACPI_OBJECT_COMMON_HEADER
 498     union acpi_operand_object       *Next;              /* Link for object cache and internal lists*/
 499
 500 } ACPI_OBJECT_CACHE_LIST;
 501
 502
 503 /******************************************************************************
 504  *
 505  * ACPI_OPERAND_OBJECT Descriptor - a giant union of all of the above
 506  *
 507  *****************************************************************************/
 508
 509 typedef union acpi_operand_object
 510 {
 511     ACPI_OBJECT_COMMON                  Common;
 512     ACPI_OBJECT_INTEGER                 Integer;
 513     ACPI_OBJECT_STRING                  String;
 514     ACPI_OBJECT_BUFFER                  Buffer;
 515     ACPI_OBJECT_PACKAGE                 Package;
 516     ACPI_OBJECT_EVENT                   Event;
 517     ACPI_OBJECT_METHOD                  Method;
 518     ACPI_OBJECT_MUTEX                   Mutex;
 519     ACPI_OBJECT_REGION                  Region;
 520     ACPI_OBJECT_NOTIFY_COMMON           CommonNotify;
 521     ACPI_OBJECT_DEVICE                  Device;
 522     ACPI_OBJECT_POWER_RESOURCE          PowerResource;
 523     ACPI_OBJECT_PROCESSOR               Processor;
 524     ACPI_OBJECT_THERMAL_ZONE            ThermalZone;
 525     ACPI_OBJECT_FIELD_COMMON            CommonField;
 526     ACPI_OBJECT_REGION_FIELD            Field;
 527     ACPI_OBJECT_BUFFER_FIELD            BufferField;
 528     ACPI_OBJECT_BANK_FIELD              BankField;
 529     ACPI_OBJECT_INDEX_FIELD             IndexField;
 530     ACPI_OBJECT_NOTIFY_HANDLER          Notify;
 531     ACPI_OBJECT_ADDR_HANDLER            AddressSpace;
 532     ACPI_OBJECT_REFERENCE               Reference;
 533     ACPI_OBJECT_EXTRA                   Extra;
 534     ACPI_OBJECT_DATA                    Data;
 535     ACPI_OBJECT_CACHE_LIST              Cache;
 536
 537     /*
 538      * Add namespace node to union in order to simplify code that accepts both
 539      * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
 540      * a common DescriptorType field in order to differentiate them.
 541      */
 542     ACPI_NAMESPACE_NODE                 Node;
 543
 544 } ACPI_OPERAND_OBJECT;
 545
 546
 547 /******************************************************************************
 548  *
 549  * ACPI_DESCRIPTOR - objects that share a common descriptor identifier
 550  *
 551  *****************************************************************************/
 552
 553 /* Object descriptor types */
 554
 555 #define ACPI_DESC_TYPE_CACHED           0x01        /* Used only when object is cached */
 556 #define ACPI_DESC_TYPE_STATE            0x02
 557 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 558 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 559 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 560 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 561 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 562 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 563 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 564 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 565 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 566 #define ACPI_DESC_TYPE_WALK             0x0C
 567 #define ACPI_DESC_TYPE_PARSER           0x0D
 568 #define ACPI_DESC_TYPE_OPERAND          0x0E
 569 #define ACPI_DESC_TYPE_NAMED            0x0F
 570 #define ACPI_DESC_TYPE_MAX              0x0F
 571
 572
 573 typedef struct acpi_common_descriptor
 574 {
 575     void                            *CommonPointer;
 576     UINT8                           DescriptorType; /* To differentiate various internal objs */
 577
 578 } ACPI_COMMON_DESCRIPTOR;
 579
 580 typedef union acpi_descriptor
 581 {
 582     ACPI_COMMON_DESCRIPTOR          Common;
 583     ACPI_OPERAND_OBJECT             Object;
 584     ACPI_NAMESPACE_NODE             Node;
 585     ACPI_PARSE_OBJECT               Op;
 586
 587 } ACPI_DESCRIPTOR;
 588
 589 #pragma pack()
 590
 591 #endif /* _ACOBJECT_H */