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 /*
  49  * The union acpi_operand_object    is used to pass AML operands from the dispatcher
  50  * to the interpreter, and to keep track of the various handlers such as
  51  * address space handlers and notify handlers.  The object is a constant
  52  * size in order to allow it to be cached and reused.
  53  */
  54
  55 /*******************************************************************************
  56  *
  57  * Common Descriptors
  58  *
  59  ******************************************************************************/
  60
  61 /*
  62  * Common area for all objects.
  63  *
  64  * data_type is used to differentiate between internal descriptors, and MUST
  65  * be the first byte in this structure.
  66  */
  67 #define ACPI_OBJECT_COMMON_HEADER   /* SIZE/ALIGNMENT: 32 bits, one ptr plus trailing 8-bit flag */\
  68         u8                                      descriptor;         /* To differentiate various internal objs */\
  69         u8                                      type;               /* acpi_object_type */\
  70         u16                                     reference_count;    /* For object deletion management */\
  71         union acpi_operand_object               *next_object;       /* Objects linked to parent NS node */\
  72         u8                                      flags; \
  73
  74 /* Values for flag byte above */
  75
  76 #define AOPOBJ_AML_CONSTANT         0x01
  77 #define AOPOBJ_STATIC_POINTER       0x02
  78 #define AOPOBJ_DATA_VALID           0x04
  79 #define AOPOBJ_OBJECT_INITIALIZED   0x08
  80 #define AOPOBJ_SETUP_COMPLETE       0x10
  81 #define AOPOBJ_SINGLE_DATUM         0x20
  82
  83 /*
  84  * Common bitfield for the field objects
  85  * "Field Datum"  -- a datum from the actual field object
  86  * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
  87  */
  88 #define ACPI_COMMON_FIELD_INFO      /* SIZE/ALIGNMENT: 24 bits + three 32-bit values */\
  89         u8                                      field_flags;        /* Access, update, and lock bits */\
  90         u8                                      attribute;          /* From access_as keyword */\
  91         u8                                      access_byte_width;  /* Read/Write size in bytes */\
  92         u32                                     bit_length;         /* Length of field in bits */\
  93         u32                                     base_byte_offset;   /* Byte offset within containing object */\
  94         u8                                      start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
  95         u8                                      access_bit_width;   /* Read/Write size in bits (8-64) */\
  96         u32                                     value;              /* Value to store into the Bank or Index register */\
  97         struct acpi_namespace_node              *node;  /* Link back to parent node */
  98
  99 /*
 100  * Fields common to both Strings and Buffers
 101  */
 102 #define ACPI_COMMON_BUFFER_INFO \
 103         u32                                     length;
 104
 105 /*
 106  * Common fields for objects that support ASL notifications
 107  */
 108 #define ACPI_COMMON_NOTIFY_INFO \
 109         union acpi_operand_object               *system_notify;     /* Handler for system notifies */\
 110         union acpi_operand_object               *device_notify;     /* Handler for driver notifies */\
 111         union acpi_operand_object               *handler;       /* Handler for Address space */
 112
 113 /******************************************************************************
 114  *
 115  * Basic data types
 116  *
 117  *****************************************************************************/
 118
 119 struct acpi_object_common {
 120 ACPI_OBJECT_COMMON_HEADER};
 121
 122 struct acpi_object_integer {
 123         ACPI_OBJECT_COMMON_HEADER acpi_integer value;
 124 };
 125
 126 /*
 127  * Note: The String and Buffer object must be identical through the Pointer
 128  * element.  There is code that depends on this.
 129  */
 130 struct acpi_object_string {     /* Null terminated, ASCII characters only */
 131         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO char *pointer;        /* String in AML stream or allocated string */
 132 };
 133
 134 struct acpi_object_buffer {
 135         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO u8 * pointer; /* Buffer in AML stream or allocated buffer */
 136         struct acpi_namespace_node *node;       /* Link back to parent node */
 137         u8 *aml_start;
 138         u32 aml_length;
 139 };
 140
 141 struct acpi_object_package {
 142         ACPI_OBJECT_COMMON_HEADER u32 count;    /* # of elements in package */
 143         u32 aml_length;
 144         u8 *aml_start;
 145         struct acpi_namespace_node *node;       /* Link back to parent node */
 146         union acpi_operand_object **elements;   /* Array of pointers to acpi_objects */
 147 };
 148
 149 /******************************************************************************
 150  *
 151  * Complex data types
 152  *
 153  *****************************************************************************/
 154
 155 struct acpi_object_event {
 156         ACPI_OBJECT_COMMON_HEADER void *semaphore;
 157 };
 158
 159 #define ACPI_INFINITE_CONCURRENCY   0xFF
 160
 161 typedef
 162 acpi_status(*ACPI_INTERNAL_METHOD) (struct acpi_walk_state * walk_state);
 163
 164 struct acpi_object_method {
 165         ACPI_OBJECT_COMMON_HEADER u8 method_flags;
 166         u8 param_count;
 167         u32 aml_length;
 168         void *semaphore;
 169         u8 *aml_start;
 170         ACPI_INTERNAL_METHOD implementation;
 171         u8 concurrency;
 172         u8 thread_count;
 173         acpi_owner_id owner_id;
 174 };
 175
 176 struct acpi_object_mutex {
 177         ACPI_OBJECT_COMMON_HEADER u8 sync_level;        /* 0-15, specified in Mutex() call */
 178         u16 acquisition_depth;  /* Allow multiple Acquires, same thread */
 179         struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
 180         void *semaphore;        /* Actual OS synchronization object */
 181         union acpi_operand_object *prev;        /* Link for list of acquired mutexes */
 182         union acpi_operand_object *next;        /* Link for list of acquired mutexes */
 183         struct acpi_namespace_node *node;       /* Containing namespace node */
 184         u8 original_sync_level; /* Owner's original sync level (0-15) */
 185 };
 186
 187 struct acpi_object_region {
 188         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 189         union acpi_operand_object *handler;     /* Handler for region access */
 190         struct acpi_namespace_node *node;       /* Containing namespace node */
 191         union acpi_operand_object *next;
 192         u32 length;
 193         acpi_physical_address address;
 194 };
 195
 196 /******************************************************************************
 197  *
 198  * Objects that can be notified.  All share a common notify_info area.
 199  *
 200  *****************************************************************************/
 201
 202 struct acpi_object_notify_common {      /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
 203 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 204
 205 struct acpi_object_device {
 206         ACPI_OBJECT_COMMON_HEADER
 207             ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
 208 };
 209
 210 struct acpi_object_power_resource {
 211         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
 212         u32 resource_order;
 213 };
 214
 215 struct acpi_object_processor {
 216         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 proc_id;
 217         u32 length;
 218         acpi_io_address address;
 219 };
 220
 221 struct acpi_object_thermal_zone {
 222 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
 223
 224 /******************************************************************************
 225  *
 226  * Fields.  All share a common header/info field.
 227  *
 228  *****************************************************************************/
 229
 230 struct acpi_object_field_common {       /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
 231         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing Operation Region object */
 232         /* (REGION/BANK fields only) */
 233 };
 234
 235 struct acpi_object_region_field {
 236         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 237 };
 238
 239 struct acpi_object_bank_field {
 240         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
 241         union acpi_operand_object *bank_obj;    /* bank_select Register object */
 242 };
 243
 244 struct acpi_object_index_field {
 245         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
 246             /*
 247              * No "region_obj" pointer needed since the Index and Data registers
 248              * are each field definitions unto themselves.
 249              */
 250         union acpi_operand_object *index_obj;   /* Index register */
 251         union acpi_operand_object *data_obj;    /* Data register */
 252 };
 253
 254 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
 255
 256 struct acpi_object_buffer_field {
 257         ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
 258 };
 259
 260 /******************************************************************************
 261  *
 262  * Objects for handlers
 263  *
 264  *****************************************************************************/
 265
 266 struct acpi_object_notify_handler {
 267         ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;     /* Parent device */
 268         acpi_notify_handler handler;
 269         void *context;
 270 };
 271
 272 /* Flags for address handler */
 273
 274 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x1
 275
 276 struct acpi_object_addr_handler {
 277         ACPI_OBJECT_COMMON_HEADER u8 space_id;
 278         u16 hflags;
 279         acpi_adr_space_handler handler;
 280         struct acpi_namespace_node *node;       /* Parent device */
 281         void *context;
 282         acpi_adr_space_setup setup;
 283         union acpi_operand_object *region_list; /* regions using this handler */
 284         union acpi_operand_object *next;
 285 };
 286
 287 /******************************************************************************
 288  *
 289  * Special internal objects
 290  *
 291  *****************************************************************************/
 292
 293 /*
 294  * The Reference object type is used for these opcodes:
 295  * Arg[0-6], Local[0-7], index_op, name_op, zero_op, one_op, ones_op, debug_op
 296  */
 297 struct acpi_object_reference {
 298         ACPI_OBJECT_COMMON_HEADER u8 target_type;       /* Used for index_op */
 299         u16 opcode;
 300         u32 offset;             /* Used for arg_op, local_op, and index_op */
 301         void *object;           /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object  */
 302         struct acpi_namespace_node *node;
 303         union acpi_operand_object **where;
 304 };
 305
 306 /*
 307  * Extra object is used as additional storage for types that
 308  * have AML code in their declarations (term_args) that must be
 309  * evaluated at run time.
 310  *
 311  * Currently: Region and field_unit types
 312  */
 313 struct acpi_object_extra {
 314         ACPI_OBJECT_COMMON_HEADER u8 byte_fill1;
 315         u16 word_fill1;
 316         u32 aml_length;
 317         u8 *aml_start;
 318         struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */
 319         void *region_context;   /* Region-specific data */
 320 };
 321
 322 /* Additional data that can be attached to namespace nodes */
 323
 324 struct acpi_object_data {
 325         ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
 326         void *pointer;
 327 };
 328
 329 /* Structure used when objects are cached for reuse */
 330
 331 struct acpi_object_cache_list {
 332         ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;      /* Link for object cache and internal lists */
 333 };
 334
 335 /******************************************************************************
 336  *
 337  * union acpi_operand_object Descriptor - a giant union of all of the above
 338  *
 339  *****************************************************************************/
 340
 341 union acpi_operand_object {
 342         struct acpi_object_common common;
 343         struct acpi_object_integer integer;
 344         struct acpi_object_string string;
 345         struct acpi_object_buffer buffer;
 346         struct acpi_object_package package;
 347         struct acpi_object_event event;
 348         struct acpi_object_method method;
 349         struct acpi_object_mutex mutex;
 350         struct acpi_object_region region;
 351         struct acpi_object_notify_common common_notify;
 352         struct acpi_object_device device;
 353         struct acpi_object_power_resource power_resource;
 354         struct acpi_object_processor processor;
 355         struct acpi_object_thermal_zone thermal_zone;
 356         struct acpi_object_field_common common_field;
 357         struct acpi_object_region_field field;
 358         struct acpi_object_buffer_field buffer_field;
 359         struct acpi_object_bank_field bank_field;
 360         struct acpi_object_index_field index_field;
 361         struct acpi_object_notify_handler notify;
 362         struct acpi_object_addr_handler address_space;
 363         struct acpi_object_reference reference;
 364         struct acpi_object_extra extra;
 365         struct acpi_object_data data;
 366         struct acpi_object_cache_list cache;
 367 };
 368
 369 /******************************************************************************
 370  *
 371  * union acpi_descriptor - objects that share a common descriptor identifier
 372  *
 373  *****************************************************************************/
 374
 375 /* Object descriptor types */
 376
 377 #define ACPI_DESC_TYPE_CACHED           0x01    /* Used only when object is cached */
 378 #define ACPI_DESC_TYPE_STATE            0x02
 379 #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
 380 #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
 381 #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
 382 #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
 383 #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
 384 #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
 385 #define ACPI_DESC_TYPE_STATE_RESULT     0x09
 386 #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
 387 #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
 388 #define ACPI_DESC_TYPE_WALK             0x0C
 389 #define ACPI_DESC_TYPE_PARSER           0x0D
 390 #define ACPI_DESC_TYPE_OPERAND          0x0E
 391 #define ACPI_DESC_TYPE_NAMED            0x0F
 392 #define ACPI_DESC_TYPE_MAX              0x0F
 393
 394 union acpi_descriptor {
 395         u8 descriptor_id;       /* To differentiate various internal objs */
 396         union acpi_operand_object object;
 397         struct acpi_namespace_node node;
 398         union acpi_parse_object op;
 399 };
 400
 401 #endif                          /* _ACOBJECT_H */