drivers/acpi/acpica/acobject.h

   1 /******************************************************************************
   2  *
   3  * Name: acobject.h - Definition of union acpi_operand_object  (Internal object only)
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2013, 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:struct_defs -- for acpisrc conversion */
  48
  49 /*
  50  * The union acpi_operand_object is used to pass AML operands from the dispatcher
  51  * to the interpreter, and to keep track of the various handlers such as
  52  * address space handlers and notify handlers. The object is a constant
  53  * size in order to allow it to be cached and reused.
  54  *
  55  * Note: The object is optimized to be aligned and will not work if it is
  56  * byte-packed.
  57  */
  58 #if ACPI_MACHINE_WIDTH == 64
  59 #pragma pack(8)
  60 #else
  61 #pragma pack(4)
  62 #endif
  63
  64 /*******************************************************************************
  65  *
  66  * Common Descriptors
  67  *
  68  ******************************************************************************/
  69
  70 /*
  71  * Common area for all objects.
  72  *
  73  * descriptor_type is used to differentiate between internal descriptors, and
  74  * must be in the same place across all descriptors
  75  *
  76  * Note: The descriptor_type and Type fields must appear in the identical
  77  * position in both the struct acpi_namespace_node and union acpi_operand_object
  78  * structures.
  79  */
  80 #define ACPI_OBJECT_COMMON_HEADER \
  81         union acpi_operand_object       *next_object;       /* Objects linked to parent NS node */\
  82         u8                              descriptor_type;    /* To differentiate various internal objs */\
  83         u8                              type;               /* acpi_object_type */\
  84         u16                             reference_count;    /* For object deletion management */\
  85         u8                              flags;
  86         /*
  87          * Note: There are 3 bytes available here before the
  88          * next natural alignment boundary (for both 32/64 cases)
  89          */
  90
  91 /* Values for Flag byte above */
  92
  93 #define AOPOBJ_AML_CONSTANT         0x01        /* Integer is an AML constant */
  94 #define AOPOBJ_STATIC_POINTER       0x02        /* Data is part of an ACPI table, don't delete */
  95 #define AOPOBJ_DATA_VALID           0x04        /* Object is initialized and data is valid */
  96 #define AOPOBJ_OBJECT_INITIALIZED   0x08        /* Region is initialized, _REG was run */
  97 #define AOPOBJ_SETUP_COMPLETE       0x10        /* Region setup is complete */
  98 #define AOPOBJ_INVALID              0x20        /* Host OS won't allow a Region address */
  99
 100 /******************************************************************************
 101  *
 102  * Basic data types
 103  *
 104  *****************************************************************************/
 105
 106 struct acpi_object_common {
 107 ACPI_OBJECT_COMMON_HEADER};
 108
 109 struct acpi_object_integer {
 110         ACPI_OBJECT_COMMON_HEADER u8 fill[3];   /* Prevent warning on some compilers */
 111         u64 value;
 112 };
 113
 114 /*
 115  * Note: The String and Buffer object must be identical through the
 116  * pointer and length elements. There is code that depends on this.
 117  *
 118  * Fields common to both Strings and Buffers
 119  */
 120 #define ACPI_COMMON_BUFFER_INFO(_type) \
 121         _type                           *pointer; \
 122         u32                             length;
 123
 124 struct acpi_object_string {     /* Null terminated, ASCII characters only */
 125         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
 126 };
 127
 128 struct acpi_object_buffer {
 129         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8)   /* Buffer in AML stream or allocated buffer */
 130         u32 aml_length;
 131         u8 *aml_start;
 132         struct acpi_namespace_node *node;       /* Link back to parent node */
 133 };
 134
 135 struct acpi_object_package {
 136         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Link back to parent node */
 137         union acpi_operand_object **elements;   /* Array of pointers to acpi_objects */
 138         u8 *aml_start;
 139         u32 aml_length;
 140         u32 count;              /* # of elements in package */
 141 };
 142
 143 /******************************************************************************
 144  *
 145  * Complex data types
 146  *
 147  *****************************************************************************/
 148
 149 struct acpi_object_event {
 150         ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 151 };
 152
 153 struct acpi_object_mutex {
 154         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
 155         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
 156         acpi_mutex os_mutex;    /* Actual OS synchronization object */
 157         acpi_thread_id thread_id;       /* Current owner of the mutex */
 158         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
 159         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
 160         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
 161         struct acpi_namespace_node *node;       /* Containing namespace node */
 162         u8 original_sync_level; /* Owner's original sync level (0-15) */
 163 };
 164
 165 struct acpi_object_region {
 166         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 167         struct acpi_namespace_node *node;       /* Containing namespace node */
 168         union acpi_operand_object *handler;     /* Handler for region access */
 169         union acpi_operand_object *next;
 170         acpi_physical_address address;
 171         u32 length;
 172 };
 173
 174 struct acpi_object_method {
 175         ACPI_OBJECT_COMMON_HEADER u8 info_flags;
 176         u8 param_count;
 177         u8 sync_level;
 178         union acpi_operand_object *mutex;
 179         u8 *aml_start;
 180         union {
 181                 acpi_internal_method implementation;
 182                 union acpi_operand_object *handler;
 183         } dispatch;
 184
 185         u32 aml_length;
 186         u8 thread_count;
 187         acpi_owner_id owner_id;
 188 };
 189
 190 /* Flags for info_flags field above */
 191
 192 #define ACPI_METHOD_MODULE_LEVEL        0x01    /* Method is actually module-level code */
 193 #define ACPI_METHOD_INTERNAL_ONLY       0x02    /* Method is implemented internally (_OSI) */
 194 #define ACPI_METHOD_SERIALIZED          0x04    /* Method is serialized */
 195 #define ACPI_METHOD_SERIALIZED_PENDING  0x08    /* Method is to be marked serialized */
 196 #define ACPI_METHOD_MODIFIED_NAMESPACE  0x10    /* Method modified the namespace */
 197
 198 /******************************************************************************
 199  *
 200  * Objects that can be notified. All share a common notify_info area.
 201  *
 202  *****************************************************************************/
 203
 204 /*
 205  * Common fields for objects that support ASL notifications
 206  */
 207 #define ACPI_COMMON_NOTIFY_INFO \
 208         union acpi_operand_object       *notify_list[2];    /* Handlers for system/device notifies */\
 209         union acpi_operand_object       *handler;       /* Handler for Address space */
 210
 211 struct acpi_object_notify_common {      /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 212 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 213
 214 struct acpi_object_device {
 215         ACPI_OBJECT_COMMON_HEADER
 216             ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
 217 };
 218
 219 struct acpi_object_power_resource {
 220         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
 221         u32 resource_order;
 222 };
 223
 224 struct acpi_object_processor {
 225         ACPI_OBJECT_COMMON_HEADER
 226             /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
 227         u8 proc_id;
 228         u8 length;
 229         ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
 230 };
 231
 232 struct acpi_object_thermal_zone {
 233 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 234
 235 /******************************************************************************
 236  *
 237  * Fields. All share a common header/info field.
 238  *
 239  *****************************************************************************/
 240
 241 /*
 242  * Common bitfield for the field objects
 243  * "Field Datum"  -- a datum from the actual field object
 244  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 245  */
 246 #define ACPI_COMMON_FIELD_INFO \
 247         u8                              field_flags;        /* Access, update, and lock bits */\
 248         u8                              attribute;          /* From access_as keyword */\
 249         u8                              access_byte_width;  /* Read/Write size in bytes */\
 250         struct acpi_namespace_node      *node;              /* Link back to parent node */\
 251         u32                             bit_length;         /* Length of field in bits */\
 252         u32                             base_byte_offset;   /* Byte offset within containing object */\
 253         u32                             value;              /* Value to store into the Bank or Index register */\
 254         u8                              start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
 255         u8                              access_length;  /* For serial regions/fields */
 256
 257
 258 struct acpi_object_field_common {       /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 259         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
 260 };
 261
 262 struct acpi_object_region_field {
 263         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u16 resource_length;
 264         union acpi_operand_object *region_obj;  /* Containing op_region object */
 265         u8 *resource_buffer;    /* resource_template for serial regions/fields */
 266 };
 267
 268 struct acpi_object_bank_field {
 269         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 270         union acpi_operand_object *bank_obj;    /* bank_select Register object */
 271 };
 272
 273 struct acpi_object_index_field {
 274         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
 275             /*
 276              * No "RegionObj" pointer needed since the Index and Data registers
 277              * are each field definitions unto themselves.
 278              */
 279         union acpi_operand_object *index_obj;   /* Index register */
 280         union acpi_operand_object *data_obj;    /* Data register */
 281 };
 282
 283 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
 284
 285 struct acpi_object_buffer_field {
 286         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
 287 };
 288
 289 /******************************************************************************
 290  *
 291  * Objects for handlers
 292  *
 293  *****************************************************************************/
 294
 295 struct acpi_object_notify_handler {
 296         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Parent device */
 297         u32 handler_type;       /* Type: Device/System/Both */
 298         acpi_notify_handler handler;    /* Handler address */
 299         void *context;
 300         union acpi_operand_object *next[2];     /* Device and System handler lists */
 301 };
 302
 303 struct acpi_object_addr_handler {
 304         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 305         u8 handler_flags;
 306         acpi_adr_space_handler handler;
 307         struct acpi_namespace_node *node;       /* Parent device */
 308         void *context;
 309         acpi_adr_space_setup setup;
 310         union acpi_operand_object *region_list; /* Regions using this handler */
 311         union acpi_operand_object *next;
 312 };
 313
 314 /* Flags for address handler (handler_flags) */
 315
 316 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 317
 318 /******************************************************************************
 319  *
 320  * Special internal objects
 321  *
 322  *****************************************************************************/
 323
 324 /*
 325  * The Reference object is used for these opcodes:
 326  * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
 327  * The Reference.Class differentiates these types.
 328  */
 329 struct acpi_object_reference {
 330         ACPI_OBJECT_COMMON_HEADER u8 class;     /* Reference Class */
 331         u8 target_type;         /* Used for Index Op */
 332         u8 reserved;
 333         void *object;           /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
 334         struct acpi_namespace_node *node;       /* ref_of or Namepath */
 335         union acpi_operand_object **where;      /* Target of Index */
 336         u32 value;              /* Used for Local/Arg/Index/ddb_handle */
 337 };
 338
 339 /* Values for Reference.Class above */
 340
 341 typedef enum {
 342         ACPI_REFCLASS_LOCAL = 0,        /* Method local */
 343         ACPI_REFCLASS_ARG = 1,  /* Method argument */
 344         ACPI_REFCLASS_REFOF = 2,        /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
 345         ACPI_REFCLASS_INDEX = 3,        /* Result of Index() */
 346         ACPI_REFCLASS_TABLE = 4,        /* ddb_handle - Load(), load_table() */
 347         ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
 348         ACPI_REFCLASS_DEBUG = 6,        /* Debug object */
 349
 350         ACPI_REFCLASS_MAX = 6
 351 } ACPI_REFERENCE_CLASSES;
 352
 353 /*
 354  * Extra object is used as additional storage for types that
 355  * have AML code in their declarations (term_args) that must be
 356  * evaluated at run time.
 357  *
 358  * Currently: Region and field_unit types
 359  */
 360 struct acpi_object_extra {
 361         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;       /* _REG method for this region (if any) */
 362         struct acpi_namespace_node *scope_node;
 363         void *region_context;   /* Region-specific data */
 364         u8 *aml_start;
 365         u32 aml_length;
 366 };
 367
 368 /* Additional data that can be attached to namespace nodes */
 369
 370 struct acpi_object_data {
 371         ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
 372         void *pointer;
 373 };
 374
 375 /* Structure used when objects are cached for reuse */
 376
 377 struct acpi_object_cache_list {
 378         ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;      /* Link for object cache and internal lists */
 379 };
 380
 381 /******************************************************************************
 382  *
 383  * union acpi_operand_object descriptor - a giant union of all of the above
 384  *
 385  *****************************************************************************/
 386
 387 union acpi_operand_object {
 388         struct acpi_object_common common;
 389         struct acpi_object_integer integer;
 390         struct acpi_object_string string;
 391         struct acpi_object_buffer buffer;
 392         struct acpi_object_package package;
 393         struct acpi_object_event event;
 394         struct acpi_object_method method;
 395         struct acpi_object_mutex mutex;
 396         struct acpi_object_region region;
 397         struct acpi_object_notify_common common_notify;
 398         struct acpi_object_device device;
 399         struct acpi_object_power_resource power_resource;
 400         struct acpi_object_processor processor;
 401         struct acpi_object_thermal_zone thermal_zone;
 402         struct acpi_object_field_common common_field;
 403         struct acpi_object_region_field field;
 404         struct acpi_object_buffer_field buffer_field;
 405         struct acpi_object_bank_field bank_field;
 406         struct acpi_object_index_field index_field;
 407         struct acpi_object_notify_handler notify;
 408         struct acpi_object_addr_handler address_space;
 409         struct acpi_object_reference reference;
 410         struct acpi_object_extra extra;
 411         struct acpi_object_data data;
 412         struct acpi_object_cache_list cache;
 413
 414         /*
 415          * Add namespace node to union in order to simplify code that accepts both
 416          * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
 417          * a common descriptor_type field in order to differentiate them.
 418          */
 419         struct acpi_namespace_node node;
 420 };
 421
 422 /******************************************************************************
 423  *
 424  * union acpi_descriptor - objects that share a common descriptor identifier
 425  *
 426  *****************************************************************************/
 427
 428 /* Object descriptor types */
 429
 430 #define ACPI_DESC_TYPE_CACHED           0x01    /* Used only when object is cached */
 431 #define ACPI_DESC_TYPE_STATE            0x02
 432 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 433 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 434 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 435 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 436 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 437 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 438 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 439 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 440 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 441 #define ACPI_DESC_TYPE_WALK             0x0C
 442 #define ACPI_DESC_TYPE_PARSER           0x0D
 443 #define ACPI_DESC_TYPE_OPERAND          0x0E
 444 #define ACPI_DESC_TYPE_NAMED            0x0F
 445 #define ACPI_DESC_TYPE_MAX              0x0F
 446
 447 struct acpi_common_descriptor {
 448         void *common_pointer;
 449         u8 descriptor_type;     /* To differentiate various internal objs */
 450 };
 451
 452 union acpi_descriptor {
 453         struct acpi_common_descriptor common;
 454         union acpi_operand_object object;
 455         struct acpi_namespace_node node;
 456         union acpi_parse_object op;
 457 };
 458
 459 #pragma pack()
 460
 461 #endif                          /* _ACOBJECT_H */