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 - 2019, 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 union acpi_operand_object *buffer_obj; /* Containing Buffer object */
264 };
265
266 /******************************************************************************
267 *
268 * Objects for handlers
269 *
270 *****************************************************************************/
271
272 struct acpi_object_notify_handler {
273 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Parent device */
274 u32 handler_type; /* Type: Device/System/Both */
275 acpi_notify_handler handler; /* Handler address */
276 void *context;
277 union acpi_operand_object *next[2]; /* Device and System handler lists */
278 };
279
280 struct acpi_object_addr_handler {
281 ACPI_OBJECT_COMMON_HEADER u8 space_id;
282 u8 handler_flags;
283 acpi_adr_space_handler handler;
284 struct acpi_namespace_node *node; /* Parent device */
285 void *context;
286 acpi_adr_space_setup setup;
287 union acpi_operand_object *region_list; /* Regions using this handler */
288 union acpi_operand_object *next;
289 };
290
291 /* Flags for address handler (handler_flags) */
292
293 #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x01
294
295 /******************************************************************************
296 *
297 * Special internal objects
298 *
299 *****************************************************************************/
300
301 /*
302 * The Reference object is used for these opcodes:
303 * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
304 * The Reference.Class differentiates these types.
305 */
306 struct acpi_object_reference {
307 ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */
308 u8 target_type; /* Used for Index Op */
309 u8 resolved; /* Reference has been resolved to a value */
310 void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
311 struct acpi_namespace_node *node; /* ref_of or Namepath */
312 union acpi_operand_object **where; /* Target of Index */
313 u8 *index_pointer; /* Used for Buffers and Strings */
314 u8 *aml; /* Used for deferred resolution of the ref */
315 u32 value; /* Used for Local/Arg/Index/ddb_handle */
316 };
317
318 /* Values for Reference.Class above */
319
320 typedef enum {
321 ACPI_REFCLASS_LOCAL = 0, /* Method local */
322 ACPI_REFCLASS_ARG = 1, /* Method argument */
323 ACPI_REFCLASS_REFOF = 2, /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
324 ACPI_REFCLASS_INDEX = 3, /* Result of Index() */
325 ACPI_REFCLASS_TABLE = 4, /* ddb_handle - Load(), load_table() */
326 ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
327 ACPI_REFCLASS_DEBUG = 6, /* Debug object */
328
329 ACPI_REFCLASS_MAX = 6
330 } ACPI_REFERENCE_CLASSES;
331
332 /*
333 * Extra object is used as additional storage for types that
334 * have AML code in their declarations (term_args) that must be
335 * evaluated at run time.
336 *
337 * Currently: Region and field_unit types
338 */
339 struct acpi_object_extra {
340 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */
341 struct acpi_namespace_node *scope_node;
342 void *region_context; /* Region-specific data */
343 u8 *aml_start;
344 u32 aml_length;
345 };
346
347 /* Additional data that can be attached to namespace nodes */
348
349 struct acpi_object_data {
350 ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
351 void *pointer;
352 };
353
354 /* Structure used when objects are cached for reuse */
355
356 struct acpi_object_cache_list {
357 ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next; /* Link for object cache and internal lists */
358 };
359
360 /******************************************************************************
361 *
362 * union acpi_operand_object descriptor - a giant union of all of the above
363 *
364 *****************************************************************************/
365
366 union acpi_operand_object {
367 struct acpi_object_common common;
368 struct acpi_object_integer integer;
369 struct acpi_object_string string;
370 struct acpi_object_buffer buffer;
371 struct acpi_object_package package;
372 struct acpi_object_event event;
373 struct acpi_object_method method;
374 struct acpi_object_mutex mutex;
375 struct acpi_object_region region;
376 struct acpi_object_notify_common common_notify;
377 struct acpi_object_device device;
378 struct acpi_object_power_resource power_resource;
379 struct acpi_object_processor processor;
380 struct acpi_object_thermal_zone thermal_zone;
381 struct acpi_object_field_common common_field;
382 struct acpi_object_region_field field;
383 struct acpi_object_buffer_field buffer_field;
384 struct acpi_object_bank_field bank_field;
385 struct acpi_object_index_field index_field;
386 struct acpi_object_notify_handler notify;
387 struct acpi_object_addr_handler address_space;
388 struct acpi_object_reference reference;
389 struct acpi_object_extra extra;
390 struct acpi_object_data data;
391 struct acpi_object_cache_list cache;
392
393 /*
394 * Add namespace node to union in order to simplify code that accepts both
395 * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
396 * a common descriptor_type field in order to differentiate them.
397 */
398 struct acpi_namespace_node node;
399 };
400
401 /******************************************************************************
402 *
403 * union acpi_descriptor - objects that share a common descriptor identifier
404 *
405 *****************************************************************************/
406
407 /* Object descriptor types */
408
409 #define ACPI_DESC_TYPE_CACHED 0x01 /* Used only when object is cached */
410 #define ACPI_DESC_TYPE_STATE 0x02
411 #define ACPI_DESC_TYPE_STATE_UPDATE 0x03
412 #define ACPI_DESC_TYPE_STATE_PACKAGE 0x04
413 #define ACPI_DESC_TYPE_STATE_CONTROL 0x05
414 #define ACPI_DESC_TYPE_STATE_RPSCOPE 0x06
415 #define ACPI_DESC_TYPE_STATE_PSCOPE 0x07
416 #define ACPI_DESC_TYPE_STATE_WSCOPE 0x08
417 #define ACPI_DESC_TYPE_STATE_RESULT 0x09
418 #define ACPI_DESC_TYPE_STATE_NOTIFY 0x0A
419 #define ACPI_DESC_TYPE_STATE_THREAD 0x0B
420 #define ACPI_DESC_TYPE_WALK 0x0C
421 #define ACPI_DESC_TYPE_PARSER 0x0D
422 #define ACPI_DESC_TYPE_OPERAND 0x0E
423 #define ACPI_DESC_TYPE_NAMED 0x0F
424 #define ACPI_DESC_TYPE_MAX 0x0F
425
426 struct acpi_common_descriptor {
427 void *common_pointer;
428 u8 descriptor_type; /* To differentiate various internal objs */
429 };
430
431 union acpi_descriptor {
432 struct acpi_common_descriptor common;
433 union acpi_operand_object object;
434 struct acpi_namespace_node node;
435 union acpi_parse_object op;
436 };
437
438 #pragma pack()
439
440 #endif /* _ACOBJECT_H */