drivers/acpi/acpica/acobject.h

   1
   2 /******************************************************************************
   3  *
   4  * Name: acobject.h - Definition of union acpi_operand_object  (Internal object only)
   5  *
   6  *****************************************************************************/
   7
   8 /*
   9  * Copyright (C) 2000 - 2008, Intel Corp.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions, and the following disclaimer,
  17  *    without modification.
  18  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  19  *    substantially similar to the "NO WARRANTY" disclaimer below
  20  *    ("Disclaimer") and any redistribution must be conditioned upon
  21  *    including a substantially similar Disclaimer requirement for further
  22  *    binary redistribution.
  23  * 3. Neither the names of the above-listed copyright holders nor the names
  24  *    of any contributors may be used to endorse or promote products derived
  25  *    from this software without specific prior written permission.
  26  *
  27  * Alternatively, this software may be distributed under the terms of the
  28  * GNU General Public License ("GPL") version 2 as published by the Free
  29  * Software Foundation.
  30  *
  31  * NO WARRANTY
  32  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  33  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  34  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  35  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  36  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  40  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  41  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  42  * POSSIBILITY OF SUCH DAMAGES.
  43  */
  44
  45 #ifndef _ACOBJECT_H
  46 #define _ACOBJECT_H
  47
  48 /* acpisrc:struct_defs -- for acpisrc conversion */
  49
  50 /*
  51  * The union 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  * descriptor_type is used to differentiate between internal descriptors, and
  75  * must be in the same place across all descriptors
  76  *
  77  * Note: The descriptor_type and Type fields must appear in the identical
  78  * position in both the struct acpi_namespace_node and union acpi_operand_object
  79  * structures.
  80  */
  81 #define ACPI_OBJECT_COMMON_HEADER \
  82         union acpi_operand_object       *next_object;       /* Objects linked to parent NS node */\
  83         u8                              descriptor_type;    /* To differentiate various internal objs */\
  84         u8                              type;               /* acpi_object_type */\
  85         u16                             reference_count;    /* For object deletion management */\
  86         u8                              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
  95 #define AOPOBJ_STATIC_POINTER       0x02
  96 #define AOPOBJ_DATA_VALID           0x04
  97 #define AOPOBJ_OBJECT_INITIALIZED   0x08
  98 #define AOPOBJ_SETUP_COMPLETE       0x10
  99 #define AOPOBJ_SINGLE_DATUM         0x20
 100 #define AOPOBJ_INVALID              0x40        /* Used if host OS won't allow an op_region address */
 101 #define AOPOBJ_MODULE_LEVEL         0x80
 102
 103 /******************************************************************************
 104  *
 105  * Basic data types
 106  *
 107  *****************************************************************************/
 108
 109 struct acpi_object_common {
 110 ACPI_OBJECT_COMMON_HEADER};
 111
 112 struct acpi_object_integer {
 113         ACPI_OBJECT_COMMON_HEADER u8 fill[3];   /* Prevent warning on some compilers */
 114         acpi_integer value;
 115 };
 116
 117 /*
 118  * Note: The String and Buffer object must be identical through the Pointer
 119  * and length elements.  There is code that depends on this.
 120  *
 121  * Fields common to both Strings and Buffers
 122  */
 123 #define ACPI_COMMON_BUFFER_INFO(_type) \
 124         _type                           *pointer; \
 125         u32                             length;
 126
 127 struct acpi_object_string {     /* Null terminated, ASCII characters only */
 128         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
 129 };
 130
 131 struct acpi_object_buffer {
 132         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8)   /* Buffer in AML stream or allocated buffer */
 133         u32 aml_length;
 134         u8 *aml_start;
 135         struct acpi_namespace_node *node;       /* Link back to parent node */
 136 };
 137
 138 struct acpi_object_package {
 139         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Link back to parent node */
 140         union acpi_operand_object **elements;   /* Array of pointers to acpi_objects */
 141         u8 *aml_start;
 142         u32 aml_length;
 143         u32 count;              /* # of elements in package */
 144 };
 145
 146 /******************************************************************************
 147  *
 148  * Complex data types
 149  *
 150  *****************************************************************************/
 151
 152 struct acpi_object_event {
 153         ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 154 };
 155
 156 struct acpi_object_mutex {
 157         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
 158         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
 159         acpi_mutex os_mutex;    /* Actual OS synchronization object */
 160         acpi_thread_id thread_id;       /* Current owner of the mutex */
 161         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
 162         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
 163         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
 164         struct acpi_namespace_node *node;       /* Containing namespace node */
 165         u8 original_sync_level; /* Owner's original sync level (0-15) */
 166 };
 167
 168 struct acpi_object_region {
 169         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 170         struct acpi_namespace_node *node;       /* Containing namespace node */
 171         union acpi_operand_object *handler;     /* Handler for region access */
 172         union acpi_operand_object *next;
 173         acpi_physical_address address;
 174         u32 length;
 175 };
 176
 177 struct acpi_object_method {
 178         ACPI_OBJECT_COMMON_HEADER u8 method_flags;
 179         u8 param_count;
 180         u8 sync_level;
 181         union acpi_operand_object *mutex;
 182         u8 *aml_start;
 183         ACPI_INTERNAL_METHOD implementation;
 184         u32 aml_length;
 185         u8 thread_count;
 186         acpi_owner_id owner_id;
 187 };
 188
 189 /******************************************************************************
 190  *
 191  * Objects that can be notified.  All share a common notify_info area.
 192  *
 193  *****************************************************************************/
 194
 195 /*
 196  * Common fields for objects that support ASL notifications
 197  */
 198 #define ACPI_COMMON_NOTIFY_INFO \
 199         union acpi_operand_object       *system_notify;     /* Handler for system notifies */\
 200         union acpi_operand_object       *device_notify;     /* Handler for driver notifies */\
 201         union acpi_operand_object       *handler;       /* Handler for Address space */
 202
 203 struct acpi_object_notify_common {      /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 204 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 205
 206 struct acpi_object_device {
 207         ACPI_OBJECT_COMMON_HEADER
 208             ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
 209 };
 210
 211 struct acpi_object_power_resource {
 212         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
 213         u32 resource_order;
 214 };
 215
 216 struct acpi_object_processor {
 217         ACPI_OBJECT_COMMON_HEADER
 218             /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
 219         u8 proc_id;
 220         u8 length;
 221         ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
 222 };
 223
 224 struct acpi_object_thermal_zone {
 225 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 226
 227 /******************************************************************************
 228  *
 229  * Fields.  All share a common header/info field.
 230  *
 231  *****************************************************************************/
 232
 233 /*
 234  * Common bitfield for the field objects
 235  * "Field Datum"  -- a datum from the actual field object
 236  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 237  */
 238 #define ACPI_COMMON_FIELD_INFO \
 239         u8                              field_flags;        /* Access, update, and lock bits */\
 240         u8                              attribute;          /* From access_as keyword */\
 241         u8                              access_byte_width;  /* Read/Write size in bytes */\
 242         struct acpi_namespace_node      *node;              /* Link back to parent node */\
 243         u32                             bit_length;         /* Length of field in bits */\
 244         u32                             base_byte_offset;   /* Byte offset within containing object */\
 245         u32                             value;              /* Value to store into the Bank or Index register */\
 246         u8                              start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
 247         u8                              access_bit_width;       /* Read/Write size in bits (8-64) */
 248
 249 struct acpi_object_field_common {       /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 250         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
 251 };
 252
 253 struct acpi_object_region_field {
 254         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 255 };
 256
 257 struct acpi_object_bank_field {
 258         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 259         union acpi_operand_object *bank_obj;    /* bank_select Register object */
 260 };
 261
 262 struct acpi_object_index_field {
 263         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
 264             /*
 265              * No "RegionObj" pointer needed since the Index and Data registers
 266              * are each field definitions unto themselves.
 267              */
 268         union acpi_operand_object *index_obj;   /* Index register */
 269         union acpi_operand_object *data_obj;    /* Data register */
 270 };
 271
 272 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
 273
 274 struct acpi_object_buffer_field {
 275         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
 276 };
 277
 278 /******************************************************************************
 279  *
 280  * Objects for handlers
 281  *
 282  *****************************************************************************/
 283
 284 struct acpi_object_notify_handler {
 285         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Parent device */
 286         acpi_notify_handler handler;
 287         void *context;
 288 };
 289
 290 struct acpi_object_addr_handler {
 291         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 292         u8 handler_flags;
 293         acpi_adr_space_handler handler;
 294         struct acpi_namespace_node *node;       /* Parent device */
 295         void *context;
 296         acpi_adr_space_setup setup;
 297         union acpi_operand_object *region_list; /* regions using this handler */
 298         union acpi_operand_object *next;
 299 };
 300
 301 /* Flags for address handler (handler_flags) */
 302
 303 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 304
 305 /******************************************************************************
 306  *
 307  * Special internal objects
 308  *
 309  *****************************************************************************/
 310
 311 /*
 312  * The Reference object is used for these opcodes:
 313  * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
 314  * The Reference.Class differentiates these types.
 315  */
 316 struct acpi_object_reference {
 317         ACPI_OBJECT_COMMON_HEADER u8 class;     /* Reference Class */
 318         u8 target_type;         /* Used for Index Op */
 319         u8 reserved;
 320         void *object;           /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
 321         struct acpi_namespace_node *node;       /* ref_of or Namepath */
 322         union acpi_operand_object **where;      /* Target of Index */
 323         u32 value;              /* Used for Local/Arg/Index/ddb_handle */
 324 };
 325
 326 /* Values for Reference.Class above */
 327
 328 typedef enum {
 329         ACPI_REFCLASS_LOCAL = 0,        /* Method local */
 330         ACPI_REFCLASS_ARG = 1,  /* Method argument */
 331         ACPI_REFCLASS_REFOF = 2,        /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
 332         ACPI_REFCLASS_INDEX = 3,        /* Result of Index() */
 333         ACPI_REFCLASS_TABLE = 4,        /* ddb_handle - Load(), load_table() */
 334         ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
 335         ACPI_REFCLASS_DEBUG = 6,        /* Debug object */
 336
 337         ACPI_REFCLASS_MAX = 6
 338 } ACPI_REFERENCE_CLASSES;
 339
 340 /*
 341  * Extra object is used as additional storage for types that
 342  * have AML code in their declarations (term_args) that must be
 343  * evaluated at run time.
 344  *
 345  * Currently: Region and field_unit types
 346  */
 347 struct acpi_object_extra {
 348         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;       /* _REG method for this region (if any) */
 349         void *region_context;   /* Region-specific data */
 350         u8 *aml_start;
 351         u32 aml_length;
 352 };
 353
 354 /* Additional data that can be attached to namespace nodes */
 355
 356 struct acpi_object_data {
 357         ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
 358         void *pointer;
 359 };
 360
 361 /* Structure used when objects are cached for reuse */
 362
 363 struct acpi_object_cache_list {
 364         ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;      /* Link for object cache and internal lists */
 365 };
 366
 367 /******************************************************************************
 368  *
 369  * union acpi_operand_object Descriptor - a giant union of all of the above
 370  *
 371  *****************************************************************************/
 372
 373 union acpi_operand_object {
 374         struct acpi_object_common common;
 375         struct acpi_object_integer integer;
 376         struct acpi_object_string string;
 377         struct acpi_object_buffer buffer;
 378         struct acpi_object_package package;
 379         struct acpi_object_event event;
 380         struct acpi_object_method method;
 381         struct acpi_object_mutex mutex;
 382         struct acpi_object_region region;
 383         struct acpi_object_notify_common common_notify;
 384         struct acpi_object_device device;
 385         struct acpi_object_power_resource power_resource;
 386         struct acpi_object_processor processor;
 387         struct acpi_object_thermal_zone thermal_zone;
 388         struct acpi_object_field_common common_field;
 389         struct acpi_object_region_field field;
 390         struct acpi_object_buffer_field buffer_field;
 391         struct acpi_object_bank_field bank_field;
 392         struct acpi_object_index_field index_field;
 393         struct acpi_object_notify_handler notify;
 394         struct acpi_object_addr_handler address_space;
 395         struct acpi_object_reference reference;
 396         struct acpi_object_extra extra;
 397         struct acpi_object_data data;
 398         struct acpi_object_cache_list cache;
 399
 400         /*
 401          * Add namespace node to union in order to simplify code that accepts both
 402          * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
 403          * a common descriptor_type field in order to differentiate them.
 404          */
 405         struct acpi_namespace_node node;
 406 };
 407
 408 /******************************************************************************
 409  *
 410  * union acpi_descriptor - objects that share a common descriptor identifier
 411  *
 412  *****************************************************************************/
 413
 414 /* Object descriptor types */
 415
 416 #define ACPI_DESC_TYPE_CACHED           0x01    /* Used only when object is cached */
 417 #define ACPI_DESC_TYPE_STATE            0x02
 418 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 419 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 420 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 421 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 422 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 423 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 424 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 425 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 426 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 427 #define ACPI_DESC_TYPE_WALK             0x0C
 428 #define ACPI_DESC_TYPE_PARSER           0x0D
 429 #define ACPI_DESC_TYPE_OPERAND          0x0E
 430 #define ACPI_DESC_TYPE_NAMED            0x0F
 431 #define ACPI_DESC_TYPE_MAX              0x0F
 432
 433 struct acpi_common_descriptor {
 434         void *common_pointer;
 435         u8 descriptor_type;     /* To differentiate various internal objs */
 436 };
 437
 438 union acpi_descriptor {
 439         struct acpi_common_descriptor common;
 440         union acpi_operand_object object;
 441         struct acpi_namespace_node node;
 442         union acpi_parse_object op;
 443 };
 444
 445 #pragma pack()
 446
 447 #endif                          /* _ACOBJECT_H */