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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13 * modification, are permitted provided that the following conditions
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21 * including a substantially similar Disclaimer requirement for further
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24 * of any contributors may be used to endorse or promote products derived
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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
100 #define AOPOBJ_INVALID 0x40 /* Used if host OS won't allow an op_region address */
102 /******************************************************************************
106 *****************************************************************************/
108 struct acpi_object_common {
109 ACPI_OBJECT_COMMON_HEADER};
111 struct acpi_object_integer {
112 ACPI_OBJECT_COMMON_HEADER u8 fill[3]; /* Prevent warning on some compilers */
117 * Note: The String and Buffer object must be identical through the Pointer
118 * and length elements. There is code that depends on this.
120 * Fields common to both Strings and Buffers
122 #define ACPI_COMMON_BUFFER_INFO(_type) \
126 struct acpi_object_string { /* Null terminated, ASCII characters only */
127 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
130 struct acpi_object_buffer {
131 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8) /* Buffer in AML stream or allocated buffer */
134 struct acpi_namespace_node *node; /* Link back to parent node */
137 struct acpi_object_package {
138 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Link back to parent node */
139 union acpi_operand_object **elements; /* Array of pointers to acpi_objects */
142 u32 count; /* # of elements in package */
145 /******************************************************************************
149 *****************************************************************************/
151 struct acpi_object_event {
152 ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore; /* Actual OS synchronization object */
155 struct acpi_object_mutex {
156 ACPI_OBJECT_COMMON_HEADER u8 sync_level; /* 0-15, specified in Mutex() call */
157 u16 acquisition_depth; /* Allow multiple Acquires, same thread */
158 acpi_mutex os_mutex; /* Actual OS synchronization object */
159 acpi_thread_id thread_id; /* Current owner of the mutex */
160 struct acpi_thread_state *owner_thread; /* Current owner of the mutex */
161 union acpi_operand_object *prev; /* Link for list of acquired mutexes */
162 union acpi_operand_object *next; /* Link for list of acquired mutexes */
163 struct acpi_namespace_node *node; /* Containing namespace node */
164 u8 original_sync_level; /* Owner's original sync level (0-15) */
167 struct acpi_object_region {
168 ACPI_OBJECT_COMMON_HEADER u8 space_id;
169 struct acpi_namespace_node *node; /* Containing namespace node */
170 union acpi_operand_object *handler; /* Handler for region access */
171 union acpi_operand_object *next;
172 acpi_physical_address address;
176 struct acpi_object_method {
177 ACPI_OBJECT_COMMON_HEADER u8 method_flags;
180 union acpi_operand_object *mutex;
182 ACPI_INTERNAL_METHOD implementation;
185 acpi_owner_id owner_id;
188 /******************************************************************************
190 * Objects that can be notified. All share a common notify_info area.
192 *****************************************************************************/
195 * Common fields for objects that support ASL notifications
197 #define ACPI_COMMON_NOTIFY_INFO \
198 union acpi_operand_object *system_notify; /* Handler for system notifies */\
199 union acpi_operand_object *device_notify; /* Handler for driver notifies */\
200 union acpi_operand_object *handler; /* Handler for Address space */
202 struct acpi_object_notify_common { /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
203 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
205 struct acpi_object_device {
206 ACPI_OBJECT_COMMON_HEADER
207 ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
210 struct acpi_object_power_resource {
211 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
215 struct acpi_object_processor {
216 ACPI_OBJECT_COMMON_HEADER
217 /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
220 ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
223 struct acpi_object_thermal_zone {
224 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
226 /******************************************************************************
228 * Fields. All share a common header/info field.
230 *****************************************************************************/
233 * Common bitfield for the field objects
234 * "Field Datum" -- a datum from the actual field object
235 * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
237 #define ACPI_COMMON_FIELD_INFO \
238 u8 field_flags; /* Access, update, and lock bits */\
239 u8 attribute; /* From access_as keyword */\
240 u8 access_byte_width; /* Read/Write size in bytes */\
241 struct acpi_namespace_node *node; /* Link back to parent node */\
242 u32 bit_length; /* Length of field in bits */\
243 u32 base_byte_offset; /* Byte offset within containing object */\
244 u32 value; /* Value to store into the Bank or Index register */\
245 u8 start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
246 u8 access_bit_width; /* Read/Write size in bits (8-64) */
248 struct acpi_object_field_common { /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
249 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
252 struct acpi_object_region_field {
253 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
256 struct acpi_object_bank_field {
257 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
258 union acpi_operand_object *bank_obj; /* bank_select Register object */
261 struct acpi_object_index_field {
262 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
264 * No "RegionObj" pointer needed since the Index and Data registers
265 * are each field definitions unto themselves.
267 union acpi_operand_object *index_obj; /* Index register */
268 union acpi_operand_object *data_obj; /* Data register */
271 /* The buffer_field is different in that it is part of a Buffer, not an op_region */
273 struct acpi_object_buffer_field {
274 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj; /* Containing Buffer object */
277 /******************************************************************************
279 * Objects for handlers
281 *****************************************************************************/
283 struct acpi_object_notify_handler {
284 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Parent device */
285 acpi_notify_handler handler;
289 struct acpi_object_addr_handler {
290 ACPI_OBJECT_COMMON_HEADER u8 space_id;
292 acpi_adr_space_handler handler;
293 struct acpi_namespace_node *node; /* Parent device */
295 acpi_adr_space_setup setup;
296 union acpi_operand_object *region_list; /* regions using this handler */
297 union acpi_operand_object *next;
300 /* Flags for address handler (handler_flags) */
302 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x01
304 /******************************************************************************
306 * Special internal objects
308 *****************************************************************************/
311 * The Reference object is used for these opcodes:
312 * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
313 * The Reference.Class differentiates these types.
315 struct acpi_object_reference {
316 ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */
317 u8 target_type; /* Used for Index Op */
319 void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
320 struct acpi_namespace_node *node; /* ref_of or Namepath */
321 union acpi_operand_object **where; /* Target of Index */
322 u32 value; /* Used for Local/Arg/Index/ddb_handle */
325 /* Values for Reference.Class above */
328 ACPI_REFCLASS_LOCAL = 0, /* Method local */
329 ACPI_REFCLASS_ARG = 1, /* Method argument */
330 ACPI_REFCLASS_REFOF = 2, /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
331 ACPI_REFCLASS_INDEX = 3, /* Result of Index() */
332 ACPI_REFCLASS_TABLE = 4, /* ddb_handle - Load(), load_table() */
333 ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
334 ACPI_REFCLASS_DEBUG = 6, /* Debug object */
336 ACPI_REFCLASS_MAX = 6
337 } ACPI_REFERENCE_CLASSES;
340 * Extra object is used as additional storage for types that
341 * have AML code in their declarations (term_args) that must be
342 * evaluated at run time.
344 * Currently: Region and field_unit types
346 struct acpi_object_extra {
347 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */
348 void *region_context; /* Region-specific data */
353 /* Additional data that can be attached to namespace nodes */
355 struct acpi_object_data {
356 ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
360 /* Structure used when objects are cached for reuse */
362 struct acpi_object_cache_list {
363 ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next; /* Link for object cache and internal lists */
366 /******************************************************************************
368 * union acpi_operand_object Descriptor - a giant union of all of the above
370 *****************************************************************************/
372 union acpi_operand_object {
373 struct acpi_object_common common;
374 struct acpi_object_integer integer;
375 struct acpi_object_string string;
376 struct acpi_object_buffer buffer;
377 struct acpi_object_package package;
378 struct acpi_object_event event;
379 struct acpi_object_method method;
380 struct acpi_object_mutex mutex;
381 struct acpi_object_region region;
382 struct acpi_object_notify_common common_notify;
383 struct acpi_object_device device;
384 struct acpi_object_power_resource power_resource;
385 struct acpi_object_processor processor;
386 struct acpi_object_thermal_zone thermal_zone;
387 struct acpi_object_field_common common_field;
388 struct acpi_object_region_field field;
389 struct acpi_object_buffer_field buffer_field;
390 struct acpi_object_bank_field bank_field;
391 struct acpi_object_index_field index_field;
392 struct acpi_object_notify_handler notify;
393 struct acpi_object_addr_handler address_space;
394 struct acpi_object_reference reference;
395 struct acpi_object_extra extra;
396 struct acpi_object_data data;
397 struct acpi_object_cache_list cache;
400 * Add namespace node to union in order to simplify code that accepts both
401 * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
402 * a common descriptor_type field in order to differentiate them.
404 struct acpi_namespace_node node;
407 /******************************************************************************
409 * union acpi_descriptor - objects that share a common descriptor identifier
411 *****************************************************************************/
413 /* Object descriptor types */
415 #define ACPI_DESC_TYPE_CACHED 0x01 /* Used only when object is cached */
416 #define ACPI_DESC_TYPE_STATE 0x02
417 #define ACPI_DESC_TYPE_STATE_UPDATE 0x03
418 #define ACPI_DESC_TYPE_STATE_PACKAGE 0x04
419 #define ACPI_DESC_TYPE_STATE_CONTROL 0x05
420 #define ACPI_DESC_TYPE_STATE_RPSCOPE 0x06
421 #define ACPI_DESC_TYPE_STATE_PSCOPE 0x07
422 #define ACPI_DESC_TYPE_STATE_WSCOPE 0x08
423 #define ACPI_DESC_TYPE_STATE_RESULT 0x09
424 #define ACPI_DESC_TYPE_STATE_NOTIFY 0x0A
425 #define ACPI_DESC_TYPE_STATE_THREAD 0x0B
426 #define ACPI_DESC_TYPE_WALK 0x0C
427 #define ACPI_DESC_TYPE_PARSER 0x0D
428 #define ACPI_DESC_TYPE_OPERAND 0x0E
429 #define ACPI_DESC_TYPE_NAMED 0x0F
430 #define ACPI_DESC_TYPE_MAX 0x0F
432 struct acpi_common_descriptor {
433 void *common_pointer;
434 u8 descriptor_type; /* To differentiate various internal objs */
437 union acpi_descriptor {
438 struct acpi_common_descriptor common;
439 union acpi_operand_object object;
440 struct acpi_namespace_node node;
441 union acpi_parse_object op;
446 #endif /* _ACOBJECT_H */