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