2 /******************************************************************************
4 * Name: acobject.h - Definition of union acpi_operand_object (Internal object only)
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2008, Intel Corp.
10 * All rights reserved.
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21 * including a substantially similar Disclaimer requirement for further
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25 * from this software without specific prior written permission.
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48 /* acpisrc:struct_defs -- for acpisrc conversion */
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.
56 * Note: The object is optimized to be aligned and will not work if it is
59 #if ACPI_MACHINE_WIDTH == 64
65 /*******************************************************************************
69 ******************************************************************************/
72 * Common area for all objects.
74 * descriptor_type is used to differentiate between internal descriptors, and
75 * must be in the same place across all descriptors
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
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 */\
88 * Note: There are 3 bytes available here before the
89 * next natural alignment boundary (for both 32/64 cases)
92 /* Values for Flag byte above */
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
101 /******************************************************************************
105 *****************************************************************************/
107 struct acpi_object_common {
108 ACPI_OBJECT_COMMON_HEADER};
110 struct acpi_object_integer {
111 ACPI_OBJECT_COMMON_HEADER u8 fill[3]; /* Prevent warning on some compilers */
116 * Note: The String and Buffer object must be identical through the Pointer
117 * and length elements. There is code that depends on this.
119 * Fields common to both Strings and Buffers
121 #define ACPI_COMMON_BUFFER_INFO(_type) \
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 */
129 struct acpi_object_buffer {
130 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8) /* Buffer in AML stream or allocated buffer */
133 struct acpi_namespace_node *node; /* Link back to parent node */
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 */
141 u32 count; /* # of elements in package */
144 /******************************************************************************
148 *****************************************************************************/
150 struct acpi_object_event {
151 ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore; /* Actual OS synchronization object */
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) */
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;
175 struct acpi_object_method {
176 ACPI_OBJECT_COMMON_HEADER u8 method_flags;
179 union acpi_operand_object *mutex;
181 ACPI_INTERNAL_METHOD implementation;
184 acpi_owner_id owner_id;
187 /******************************************************************************
189 * Objects that can be notified. All share a common notify_info area.
191 *****************************************************************************/
194 * Common fields for objects that support ASL notifications
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 */
201 struct acpi_object_notify_common { /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
202 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
204 struct acpi_object_device {
205 ACPI_OBJECT_COMMON_HEADER
206 ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
209 struct acpi_object_power_resource {
210 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
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 */
219 ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
222 struct acpi_object_thermal_zone {
223 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
225 /******************************************************************************
227 * Fields. All share a common header/info field.
229 *****************************************************************************/
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
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) */
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) */
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 */
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 */
260 struct acpi_object_index_field {
261 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
263 * No "RegionObj" pointer needed since the Index and Data registers
264 * are each field definitions unto themselves.
266 union acpi_operand_object *index_obj; /* Index register */
267 union acpi_operand_object *data_obj; /* Data register */
270 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
272 struct acpi_object_buffer_field {
273 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
276 /******************************************************************************
278 * Objects for handlers
280 *****************************************************************************/
282 struct acpi_object_notify_handler {
283 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Parent device */
284 acpi_notify_handler handler;
288 struct acpi_object_addr_handler {
289 ACPI_OBJECT_COMMON_HEADER u8 space_id;
291 acpi_adr_space_handler handler;
292 struct acpi_namespace_node *node; /* Parent device */
294 acpi_adr_space_setup setup;
295 union acpi_operand_object *region_list; /* regions using this handler */
296 union acpi_operand_object *next;
299 /* Flags for address handler (handler_flags) */
301 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x01
303 /******************************************************************************
305 * Special internal objects
307 *****************************************************************************/
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.
314 struct acpi_object_reference {
315 ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */
316 u8 target_type; /* Used for Index Op */
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 */
324 /* Values for Reference.Class above */
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 */
335 ACPI_REFCLASS_MAX = 6
336 } ACPI_REFERENCE_CLASSES;
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.
343 * Currently: Region and field_unit types
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 */
352 /* Additional data that can be attached to namespace nodes */
354 struct acpi_object_data {
355 ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
359 /* Structure used when objects are cached for reuse */
361 struct acpi_object_cache_list {
362 ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next; /* Link for object cache and internal lists */
365 /******************************************************************************
367 * union acpi_operand_object Descriptor - a giant union of all of the above
369 *****************************************************************************/
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;
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.
403 struct acpi_namespace_node node;
406 /******************************************************************************
408 * union acpi_descriptor - objects that share a common descriptor identifier
410 *****************************************************************************/
412 /* Object descriptor types */
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
431 struct acpi_common_descriptor {
432 void *common_pointer;
433 u8 descriptor_type; /* To differentiate various internal objs */
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;
445 #endif /* _ACOBJECT_H */