1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2 /****************************************************************************** 3 * 4 * Name: acobject.h - Definition of union acpi_operand_object (Internal object only) 5 * 6 * Copyright (C) 2000 - 2021, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #ifndef _ACOBJECT_H 11 #define _ACOBJECT_H 12 13 /* acpisrc:struct_defs -- for acpisrc conversion */ 14 15 /* 16 * The union acpi_operand_object is used to pass AML operands from the dispatcher 17 * to the interpreter, and to keep track of the various handlers such as 18 * address space handlers and notify handlers. The object is a constant 19 * size in order to allow it to be cached and reused. 20 * 21 * Note: The object is optimized to be aligned and will not work if it is 22 * byte-packed. 23 */ 24 #if ACPI_MACHINE_WIDTH == 64 25 #pragma pack(8) 26 #else 27 #pragma pack(4) 28 #endif 29 30 /******************************************************************************* 31 * 32 * Common Descriptors 33 * 34 ******************************************************************************/ 35 36 /* 37 * Common area for all objects. 38 * 39 * descriptor_type is used to differentiate between internal descriptors, and 40 * must be in the same place across all descriptors 41 * 42 * Note: The descriptor_type and Type fields must appear in the identical 43 * position in both the struct acpi_namespace_node and union acpi_operand_object 44 * structures. 45 */ 46 #define ACPI_OBJECT_COMMON_HEADER \ 47 union acpi_operand_object *next_object; /* Objects linked to parent NS node */\ 48 u8 descriptor_type; /* To differentiate various internal objs */\ 49 u8 type; /* acpi_object_type */\ 50 u16 reference_count; /* For object deletion management */\ 51 u8 flags; 52 /* 53 * Note: There are 3 bytes available here before the 54 * next natural alignment boundary (for both 32/64 cases) 55 */ 56 57 /* Values for Flag byte above */ 58 59 #define AOPOBJ_AML_CONSTANT 0x01 /* Integer is an AML constant */ 60 #define AOPOBJ_STATIC_POINTER 0x02 /* Data is part of an ACPI table, don't delete */ 61 #define AOPOBJ_DATA_VALID 0x04 /* Object is initialized and data is valid */ 62 #define AOPOBJ_OBJECT_INITIALIZED 0x08 /* Region is initialized */ 63 #define AOPOBJ_REG_CONNECTED 0x10 /* _REG was run */ 64 #define AOPOBJ_SETUP_COMPLETE 0x20 /* Region setup is complete */ 65 #define AOPOBJ_INVALID 0x40 /* Host OS won't allow a Region address */ 66 67 /****************************************************************************** 68 * 69 * Basic data types 70 * 71 *****************************************************************************/ 72 73 struct acpi_object_common { 74 ACPI_OBJECT_COMMON_HEADER}; 75 76 struct acpi_object_integer { 77 ACPI_OBJECT_COMMON_HEADER u8 fill[3]; /* Prevent warning on some compilers */ 78 u64 value; 79 }; 80 81 /* 82 * Note: The String and Buffer object must be identical through the 83 * pointer and length elements. There is code that depends on this. 84 * 85 * Fields common to both Strings and Buffers 86 */ 87 #define ACPI_COMMON_BUFFER_INFO(_type) \ 88 _type *pointer; \ 89 u32 length; 90 91 /* Null terminated, ASCII characters only */ 92 93 struct acpi_object_string { 94 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */ 95 }; 96 97 struct acpi_object_buffer { 98 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8) /* Buffer in AML stream or allocated buffer */ 99 u32 aml_length; 100 u8 *aml_start; 101 struct acpi_namespace_node *node; /* Link back to parent node */ 102 }; 103 104 struct acpi_object_package { 105 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Link back to parent node */ 106 union acpi_operand_object **elements; /* Array of pointers to acpi_objects */ 107 u8 *aml_start; 108 u32 aml_length; 109 u32 count; /* # of elements in package */ 110 }; 111 112 /****************************************************************************** 113 * 114 * Complex data types 115 * 116 *****************************************************************************/ 117 118 struct acpi_object_event { 119 ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore; /* Actual OS synchronization object */ 120 }; 121 122 struct acpi_object_mutex { 123 ACPI_OBJECT_COMMON_HEADER u8 sync_level; /* 0-15, specified in Mutex() call */ 124 u16 acquisition_depth; /* Allow multiple Acquires, same thread */ 125 acpi_mutex os_mutex; /* Actual OS synchronization object */ 126 acpi_thread_id thread_id; /* Current owner of the mutex */ 127 struct acpi_thread_state *owner_thread; /* Current owner of the mutex */ 128 union acpi_operand_object *prev; /* Link for list of acquired mutexes */ 129 union acpi_operand_object *next; /* Link for list of acquired mutexes */ 130 struct acpi_namespace_node *node; /* Containing namespace node */ 131 u8 original_sync_level; /* Owner's original sync level (0-15) */ 132 }; 133 134 struct acpi_object_region { 135 ACPI_OBJECT_COMMON_HEADER u8 space_id; 136 struct acpi_namespace_node *node; /* Containing namespace node */ 137 union acpi_operand_object *handler; /* Handler for region access */ 138 union acpi_operand_object *next; 139 acpi_physical_address address; 140 u32 length; 141 }; 142 143 struct acpi_object_method { 144 ACPI_OBJECT_COMMON_HEADER u8 info_flags; 145 u8 param_count; 146 u8 sync_level; 147 union acpi_operand_object *mutex; 148 union acpi_operand_object *node; 149 u8 *aml_start; 150 union { 151 acpi_internal_method implementation; 152 union acpi_operand_object *handler; 153 } dispatch; 154 155 u32 aml_length; 156 acpi_owner_id owner_id; 157 u8 thread_count; 158 }; 159 160 /* Flags for info_flags field above */ 161 162 #define ACPI_METHOD_MODULE_LEVEL 0x01 /* Method is actually module-level code */ 163 #define ACPI_METHOD_INTERNAL_ONLY 0x02 /* Method is implemented internally (_OSI) */ 164 #define ACPI_METHOD_SERIALIZED 0x04 /* Method is serialized */ 165 #define ACPI_METHOD_SERIALIZED_PENDING 0x08 /* Method is to be marked serialized */ 166 #define ACPI_METHOD_IGNORE_SYNC_LEVEL 0x10 /* Method was auto-serialized at table load time */ 167 #define ACPI_METHOD_MODIFIED_NAMESPACE 0x20 /* Method modified the namespace */ 168 169 /****************************************************************************** 170 * 171 * Objects that can be notified. All share a common notify_info area. 172 * 173 *****************************************************************************/ 174 175 /* 176 * Common fields for objects that support ASL notifications 177 */ 178 #define ACPI_COMMON_NOTIFY_INFO \ 179 union acpi_operand_object *notify_list[2]; /* Handlers for system/device notifies */\ 180 union acpi_operand_object *handler; /* Handler for Address space */ 181 182 /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */ 183 184 struct acpi_object_notify_common { 185 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO}; 186 187 struct acpi_object_device { 188 ACPI_OBJECT_COMMON_HEADER 189 ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block; 190 }; 191 192 struct acpi_object_power_resource { 193 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level; 194 u32 resource_order; 195 }; 196 197 struct acpi_object_processor { 198 ACPI_OBJECT_COMMON_HEADER 199 /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */ 200 u8 proc_id; 201 u8 length; 202 ACPI_COMMON_NOTIFY_INFO acpi_io_address address; 203 }; 204 205 struct acpi_object_thermal_zone { 206 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO}; 207 208 /****************************************************************************** 209 * 210 * Fields. All share a common header/info field. 211 * 212 *****************************************************************************/ 213 214 /* 215 * Common bitfield for the field objects 216 * "Field Datum" -- a datum from the actual field object 217 * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field 218 */ 219 #define ACPI_COMMON_FIELD_INFO \ 220 u8 field_flags; /* Access, update, and lock bits */\ 221 u8 attribute; /* From access_as keyword */\ 222 u8 access_byte_width; /* Read/Write size in bytes */\ 223 struct acpi_namespace_node *node; /* Link back to parent node */\ 224 u32 bit_length; /* Length of field in bits */\ 225 u32 base_byte_offset; /* Byte offset within containing object */\ 226 u32 value; /* Value to store into the Bank or Index register */\ 227 u8 start_field_bit_offset;/* Bit offset within first field datum (0-63) */\ 228 u8 access_length; /* For serial regions/fields */ 229 230 231 /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */ 232 233 struct acpi_object_field_common { 234 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */ 235 }; 236 237 struct acpi_object_region_field { 238 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u16 resource_length; 239 union acpi_operand_object *region_obj; /* Containing op_region object */ 240 u8 *resource_buffer; /* resource_template for serial regions/fields */ 241 u16 pin_number_index; /* Index relative to previous Connection/Template */ 242 u8 *internal_pcc_buffer; /* Internal buffer for fields associated with PCC */ 243 }; 244 245 struct acpi_object_bank_field { 246 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */ 247 union acpi_operand_object *bank_obj; /* bank_select Register object */ 248 }; 249 250 struct acpi_object_index_field { 251 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO 252 /* 253 * No "RegionObj" pointer needed since the Index and Data registers 254 * are each field definitions unto themselves. 255 */ 256 union acpi_operand_object *index_obj; /* Index register */ 257 union acpi_operand_object *data_obj; /* Data register */ 258 }; 259 260 /* The buffer_field is different in that it is part of a Buffer, not an op_region */ 261 262 struct acpi_object_buffer_field { 263 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u8 is_create_field; /* Special case for objects created by create_field() */ 264 union acpi_operand_object *buffer_obj; /* Containing Buffer object */ 265 }; 266 267 /****************************************************************************** 268 * 269 * Objects for handlers 270 * 271 *****************************************************************************/ 272 273 struct acpi_object_notify_handler { 274 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Parent device */ 275 u32 handler_type; /* Type: Device/System/Both */ 276 acpi_notify_handler handler; /* Handler address */ 277 void *context; 278 union acpi_operand_object *next[2]; /* Device and System handler lists */ 279 }; 280 281 struct acpi_object_addr_handler { 282 ACPI_OBJECT_COMMON_HEADER u8 space_id; 283 u8 handler_flags; 284 acpi_adr_space_handler handler; 285 struct acpi_namespace_node *node; /* Parent device */ 286 void *context; 287 acpi_mutex context_mutex; 288 acpi_adr_space_setup setup; 289 union acpi_operand_object *region_list; /* Regions using this handler */ 290 union acpi_operand_object *next; 291 }; 292 293 /* Flags for address handler (handler_flags) */ 294 295 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x01 296 297 /****************************************************************************** 298 * 299 * Special internal objects 300 * 301 *****************************************************************************/ 302 303 /* 304 * The Reference object is used for these opcodes: 305 * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op 306 * The Reference.Class differentiates these types. 307 */ 308 struct acpi_object_reference { 309 ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */ 310 u8 target_type; /* Used for Index Op */ 311 u8 resolved; /* Reference has been resolved to a value */ 312 void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */ 313 struct acpi_namespace_node *node; /* ref_of or Namepath */ 314 union acpi_operand_object **where; /* Target of Index */ 315 u8 *index_pointer; /* Used for Buffers and Strings */ 316 u8 *aml; /* Used for deferred resolution of the ref */ 317 u32 value; /* Used for Local/Arg/Index/ddb_handle */ 318 }; 319 320 /* Values for Reference.Class above */ 321 322 typedef enum { 323 ACPI_REFCLASS_LOCAL = 0, /* Method local */ 324 ACPI_REFCLASS_ARG = 1, /* Method argument */ 325 ACPI_REFCLASS_REFOF = 2, /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */ 326 ACPI_REFCLASS_INDEX = 3, /* Result of Index() */ 327 ACPI_REFCLASS_TABLE = 4, /* ddb_handle - Load(), load_table() */ 328 ACPI_REFCLASS_NAME = 5, /* Reference to a named object */ 329 ACPI_REFCLASS_DEBUG = 6, /* Debug object */ 330 331 ACPI_REFCLASS_MAX = 6 332 } ACPI_REFERENCE_CLASSES; 333 334 /* 335 * Extra object is used as additional storage for types that 336 * have AML code in their declarations (term_args) that must be 337 * evaluated at run time. 338 * 339 * Currently: Region and field_unit types 340 */ 341 struct acpi_object_extra { 342 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */ 343 struct acpi_namespace_node *scope_node; 344 void *region_context; /* Region-specific data */ 345 u8 *aml_start; 346 u32 aml_length; 347 }; 348 349 /* Additional data that can be attached to namespace nodes */ 350 351 struct acpi_object_data { 352 ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler; 353 void *pointer; 354 }; 355 356 /* Structure used when objects are cached for reuse */ 357 358 struct acpi_object_cache_list { 359 ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next; /* Link for object cache and internal lists */ 360 }; 361 362 /****************************************************************************** 363 * 364 * union acpi_operand_object descriptor - a giant union of all of the above 365 * 366 *****************************************************************************/ 367 368 union acpi_operand_object { 369 struct acpi_object_common common; 370 struct acpi_object_integer integer; 371 struct acpi_object_string string; 372 struct acpi_object_buffer buffer; 373 struct acpi_object_package package; 374 struct acpi_object_event event; 375 struct acpi_object_method method; 376 struct acpi_object_mutex mutex; 377 struct acpi_object_region region; 378 struct acpi_object_notify_common common_notify; 379 struct acpi_object_device device; 380 struct acpi_object_power_resource power_resource; 381 struct acpi_object_processor processor; 382 struct acpi_object_thermal_zone thermal_zone; 383 struct acpi_object_field_common common_field; 384 struct acpi_object_region_field field; 385 struct acpi_object_buffer_field buffer_field; 386 struct acpi_object_bank_field bank_field; 387 struct acpi_object_index_field index_field; 388 struct acpi_object_notify_handler notify; 389 struct acpi_object_addr_handler address_space; 390 struct acpi_object_reference reference; 391 struct acpi_object_extra extra; 392 struct acpi_object_data data; 393 struct acpi_object_cache_list cache; 394 395 /* 396 * Add namespace node to union in order to simplify code that accepts both 397 * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share 398 * a common descriptor_type field in order to differentiate them. 399 */ 400 struct acpi_namespace_node node; 401 }; 402 403 /****************************************************************************** 404 * 405 * union acpi_descriptor - objects that share a common descriptor identifier 406 * 407 *****************************************************************************/ 408 409 /* Object descriptor types */ 410 411 #define ACPI_DESC_TYPE_CACHED 0x01 /* Used only when object is cached */ 412 #define ACPI_DESC_TYPE_STATE 0x02 413 #define ACPI_DESC_TYPE_STATE_UPDATE 0x03 414 #define ACPI_DESC_TYPE_STATE_PACKAGE 0x04 415 #define ACPI_DESC_TYPE_STATE_CONTROL 0x05 416 #define ACPI_DESC_TYPE_STATE_RPSCOPE 0x06 417 #define ACPI_DESC_TYPE_STATE_PSCOPE 0x07 418 #define ACPI_DESC_TYPE_STATE_WSCOPE 0x08 419 #define ACPI_DESC_TYPE_STATE_RESULT 0x09 420 #define ACPI_DESC_TYPE_STATE_NOTIFY 0x0A 421 #define ACPI_DESC_TYPE_STATE_THREAD 0x0B 422 #define ACPI_DESC_TYPE_WALK 0x0C 423 #define ACPI_DESC_TYPE_PARSER 0x0D 424 #define ACPI_DESC_TYPE_OPERAND 0x0E 425 #define ACPI_DESC_TYPE_NAMED 0x0F 426 #define ACPI_DESC_TYPE_MAX 0x0F 427 428 struct acpi_common_descriptor { 429 void *common_pointer; 430 u8 descriptor_type; /* To differentiate various internal objs */ 431 }; 432 433 union acpi_descriptor { 434 struct acpi_common_descriptor common; 435 union acpi_operand_object object; 436 struct acpi_namespace_node node; 437 union acpi_parse_object op; 438 }; 439 440 #pragma pack() 441 442 #endif /* _ACOBJECT_H */ 443