include/acpi/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 - 2006, R. Byron Moore
  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
  57 /*******************************************************************************
  58  *
  59  * Common Descriptors
  60  *
  61  ******************************************************************************/
  62
  63 /*
  64  * Common area for all objects.
  65  *
  66  * descriptor_type is used to differentiate between internal descriptors, and
  67  * must be in the same place across all descriptors
  68  *
  69  * Note: The descriptor_type and Type fields must appear in the identical
  70  * position in both the struct acpi_namespace_node and union acpi_operand_object
  71  * structures.
  72  */
  73 #define ACPI_OBJECT_COMMON_HEADER \
  74         union acpi_operand_object       *next_object;       /* Objects linked to parent NS node */\
  75         u8                              descriptor_type;    /* To differentiate various internal objs */\
  76         u8                              type;               /* acpi_object_type */\
  77         u16                             reference_count;    /* For object deletion management */\
  78         u8                              flags;
  79         /*
  80          * Note: There are 3 bytes available here before the
  81          * next natural alignment boundary (for both 32/64 cases)
  82          */
  83
  84 /* Values for Flag byte above */
  85
  86 #define AOPOBJ_AML_CONSTANT         0x01
  87 #define AOPOBJ_STATIC_POINTER       0x02
  88 #define AOPOBJ_DATA_VALID           0x04
  89 #define AOPOBJ_OBJECT_INITIALIZED   0x08
  90 #define AOPOBJ_SETUP_COMPLETE       0x10
  91 #define AOPOBJ_SINGLE_DATUM         0x20
  92 #define AOPOBJ_INVALID              0x40        /* Used if host OS won't allow an op_region address */
  93
  94 /******************************************************************************
  95  *
  96  * Basic data types
  97  *
  98  *****************************************************************************/
  99
 100 struct acpi_object_common {
 101 ACPI_OBJECT_COMMON_HEADER};
 102
 103 struct acpi_object_integer {
 104         ACPI_OBJECT_COMMON_HEADER acpi_integer value;
 105 };
 106
 107 /*
 108  * Note: The String and Buffer object must be identical through the Pointer
 109  * and length elements.  There is code that depends on this.
 110  *
 111  * Fields common to both Strings and Buffers
 112  */
 113 #define ACPI_COMMON_BUFFER_INFO(_type) \
 114         _type                           *pointer; \
 115         u32                             length;
 116
 117 struct acpi_object_string {     /* Null terminated, ASCII characters only */
 118         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
 119 };
 120
 121 struct acpi_object_buffer {
 122         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8)   /* Buffer in AML stream or allocated buffer */
 123         u32 aml_length;
 124         u8 *aml_start;
 125         struct acpi_namespace_node *node;       /* Link back to parent node */
 126 };
 127
 128 struct acpi_object_package {
 129         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Link back to parent node */
 130         union acpi_operand_object **elements;   /* Array of pointers to acpi_objects */
 131         u8 *aml_start;
 132         u32 aml_length;
 133         u32 count;              /* # of elements in package */
 134 };
 135
 136 /******************************************************************************
 137  *
 138  * Complex data types
 139  *
 140  *****************************************************************************/
 141
 142 struct acpi_object_event {
 143         ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;  /* Actual OS synchronization object */
 144 };
 145
 146 struct acpi_object_mutex {
 147         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
 148         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
 149         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
 150         acpi_mutex os_mutex;    /* Actual OS synchronization object */
 151         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
 152         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
 153         struct acpi_namespace_node *node;       /* Containing namespace node */
 154         u8 original_sync_level; /* Owner's original sync level (0-15) */
 155 };
 156
 157 struct acpi_object_region {
 158         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 159         struct acpi_namespace_node *node;       /* Containing namespace node */
 160         union acpi_operand_object *handler;     /* Handler for region access */
 161         union acpi_operand_object *next;
 162         acpi_physical_address address;
 163         u32 length;
 164 };
 165
 166 struct acpi_object_method {
 167         ACPI_OBJECT_COMMON_HEADER u8 method_flags;
 168         u8 param_count;
 169         u8 sync_level;
 170         union acpi_operand_object *mutex;
 171         u8 *aml_start;
 172         ACPI_INTERNAL_METHOD implementation;
 173         u32 aml_length;
 174         u8 thread_count;
 175         acpi_owner_id owner_id;
 176 };
 177
 178 /******************************************************************************
 179  *
 180  * Objects that can be notified.  All share a common notify_info area.
 181  *
 182  *****************************************************************************/
 183
 184 /*
 185  * Common fields for objects that support ASL notifications
 186  */
 187 #define ACPI_COMMON_NOTIFY_INFO \
 188         union acpi_operand_object       *system_notify;     /* Handler for system notifies */\
 189         union acpi_operand_object       *device_notify;     /* Handler for driver notifies */\
 190         union acpi_operand_object       *handler;       /* Handler for Address space */
 191
 192 struct acpi_object_notify_common {      /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 193 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 194
 195 struct acpi_object_device {
 196         ACPI_OBJECT_COMMON_HEADER
 197             ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
 198 };
 199
 200 struct acpi_object_power_resource {
 201         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
 202         u32 resource_order;
 203 };
 204
 205 struct acpi_object_processor {
 206         ACPI_OBJECT_COMMON_HEADER u8 proc_id;
 207         u8 length;
 208          ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
 209 };
 210
 211 struct acpi_object_thermal_zone {
 212 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 213
 214 /******************************************************************************
 215  *
 216  * Fields.  All share a common header/info field.
 217  *
 218  *****************************************************************************/
 219
 220 /*
 221  * Common bitfield for the field objects
 222  * "Field Datum"  -- a datum from the actual field object
 223  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
 224  */
 225 #define ACPI_COMMON_FIELD_INFO \
 226         u8                              field_flags;        /* Access, update, and lock bits */\
 227         u8                              attribute;          /* From access_as keyword */\
 228         u8                              access_byte_width;  /* Read/Write size in bytes */\
 229         struct acpi_namespace_node      *node;              /* Link back to parent node */\
 230         u32                             bit_length;         /* Length of field in bits */\
 231         u32                             base_byte_offset;   /* Byte offset within containing object */\
 232         u32                             value;              /* Value to store into the Bank or Index register */\
 233         u8                              start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
 234         u8                              access_bit_width;       /* Read/Write size in bits (8-64) */
 235
 236 struct acpi_object_field_common {       /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 237         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
 238 };
 239
 240 struct acpi_object_region_field {
 241         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 242 };
 243
 244 struct acpi_object_bank_field {
 245         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 246         union acpi_operand_object *bank_obj;    /* bank_select Register object */
 247 };
 248
 249 struct acpi_object_index_field {
 250         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
 251             /*
 252              * No "RegionObj" pointer needed since the Index and Data registers
 253              * are each field definitions unto themselves.
 254              */
 255         union acpi_operand_object *index_obj;   /* Index register */
 256         union acpi_operand_object *data_obj;    /* Data register */
 257 };
 258
 259 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
 260
 261 struct acpi_object_buffer_field {
 262         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
 263 };
 264
 265 /******************************************************************************
 266  *
 267  * Objects for handlers
 268  *
 269  *****************************************************************************/
 270
 271 struct acpi_object_notify_handler {
 272         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Parent device */
 273         acpi_notify_handler handler;
 274         void *context;
 275 };
 276
 277 struct acpi_object_addr_handler {
 278         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 279         u8 handler_flags;
 280         acpi_adr_space_handler handler;
 281         struct acpi_namespace_node *node;       /* Parent device */
 282         void *context;
 283         acpi_adr_space_setup setup;
 284         union acpi_operand_object *region_list; /* regions using this handler */
 285         union acpi_operand_object *next;
 286 };
 287
 288 /* Flags for address handler (handler_flags) */
 289
 290 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
 291
 292 /******************************************************************************
 293  *
 294  * Special internal objects
 295  *
 296  *****************************************************************************/
 297
 298 /*
 299  * The Reference object type is used for these opcodes:
 300  * Arg[0-6], Local[0-7], index_op, name_op, zero_op, one_op, ones_op, debug_op
 301  */
 302 struct acpi_object_reference {
 303         ACPI_OBJECT_COMMON_HEADER u8 target_type;       /* Used for index_op */
 304         u16 opcode;
 305         void *object;           /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
 306         struct acpi_namespace_node *node;
 307         union acpi_operand_object **where;
 308         u32 offset;             /* Used for arg_op, local_op, and index_op */
 309 };
 310
 311 /*
 312  * Extra object is used as additional storage for types that
 313  * have AML code in their declarations (term_args) that must be
 314  * evaluated at run time.
 315  *
 316  * Currently: Region and field_unit types
 317  */
 318 struct acpi_object_extra {
 319         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;       /* _REG method for this region (if any) */
 320         void *region_context;   /* Region-specific data */
 321         u8 *aml_start;
 322         u32 aml_length;
 323 };
 324
 325 /* Additional data that can be attached to namespace nodes */
 326
 327 struct acpi_object_data {
 328         ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
 329         void *pointer;
 330 };
 331
 332 /* Structure used when objects are cached for reuse */
 333
 334 struct acpi_object_cache_list {
 335         ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;      /* Link for object cache and internal lists */
 336 };
 337
 338 /******************************************************************************
 339  *
 340  * union acpi_operand_object Descriptor - a giant union of all of the above
 341  *
 342  *****************************************************************************/
 343
 344 union acpi_operand_object {
 345         struct acpi_object_common common;
 346         struct acpi_object_integer integer;
 347         struct acpi_object_string string;
 348         struct acpi_object_buffer buffer;
 349         struct acpi_object_package package;
 350         struct acpi_object_event event;
 351         struct acpi_object_method method;
 352         struct acpi_object_mutex mutex;
 353         struct acpi_object_region region;
 354         struct acpi_object_notify_common common_notify;
 355         struct acpi_object_device device;
 356         struct acpi_object_power_resource power_resource;
 357         struct acpi_object_processor processor;
 358         struct acpi_object_thermal_zone thermal_zone;
 359         struct acpi_object_field_common common_field;
 360         struct acpi_object_region_field field;
 361         struct acpi_object_buffer_field buffer_field;
 362         struct acpi_object_bank_field bank_field;
 363         struct acpi_object_index_field index_field;
 364         struct acpi_object_notify_handler notify;
 365         struct acpi_object_addr_handler address_space;
 366         struct acpi_object_reference reference;
 367         struct acpi_object_extra extra;
 368         struct acpi_object_data data;
 369         struct acpi_object_cache_list cache;
 370 };
 371
 372 /******************************************************************************
 373  *
 374  * union acpi_descriptor - objects that share a common descriptor identifier
 375  *
 376  *****************************************************************************/
 377
 378 /* Object descriptor types */
 379
 380 #define ACPI_DESC_TYPE_CACHED           0x01    /* Used only when object is cached */
 381 #define ACPI_DESC_TYPE_STATE            0x02
 382 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 383 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 384 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 385 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 386 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 387 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 388 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 389 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 390 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 391 #define ACPI_DESC_TYPE_WALK             0x0C
 392 #define ACPI_DESC_TYPE_PARSER           0x0D
 393 #define ACPI_DESC_TYPE_OPERAND          0x0E
 394 #define ACPI_DESC_TYPE_NAMED            0x0F
 395 #define ACPI_DESC_TYPE_MAX              0x0F
 396
 397 struct acpi_common_descriptor {
 398         void *common_pointer;
 399         u8 descriptor_type;     /* To differentiate various internal objs */
 400 };
 401
 402 union acpi_descriptor {
 403         struct acpi_common_descriptor common;
 404         union acpi_operand_object object;
 405         struct acpi_namespace_node node;
 406         union acpi_parse_object op;
 407 };
 408
 409 #endif                          /* _ACOBJECT_H */