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 - 2023, 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
73struct acpi_object_common {
74ACPI_OBJECT_COMMON_HEADER};
75
76struct 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
93struct acpi_object_string {
94 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char) /* String in AML stream or allocated string */
95};
96
97struct 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
104struct 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
118struct acpi_object_event {
119 ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore; /* Actual OS synchronization object */
120};
121
122struct 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
134struct 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 void *pointer; /* Only for data table regions */
142};
143
144struct acpi_object_method {
145 ACPI_OBJECT_COMMON_HEADER u8 info_flags;
146 u8 param_count;
147 u8 sync_level;
148 union acpi_operand_object *mutex;
149 union acpi_operand_object *node;
150 u8 *aml_start;
151 union {
152 acpi_internal_method implementation;
153 union acpi_operand_object *handler;
154 } dispatch;
155
156 u32 aml_length;
157 acpi_owner_id owner_id;
158 u8 thread_count;
159};
160
161/* Flags for info_flags field above */
162
163#define ACPI_METHOD_MODULE_LEVEL 0x01 /* Method is actually module-level code */
164#define ACPI_METHOD_INTERNAL_ONLY 0x02 /* Method is implemented internally (_OSI) */
165#define ACPI_METHOD_SERIALIZED 0x04 /* Method is serialized */
166#define ACPI_METHOD_SERIALIZED_PENDING 0x08 /* Method is to be marked serialized */
167#define ACPI_METHOD_IGNORE_SYNC_LEVEL 0x10 /* Method was auto-serialized at table load time */
168#define ACPI_METHOD_MODIFIED_NAMESPACE 0x20 /* Method modified the namespace */
169
170/******************************************************************************
171 *
172 * Objects that can be notified. All share a common notify_info area.
173 *
174 *****************************************************************************/
175
176/*
177 * Common fields for objects that support ASL notifications
178 */
179#define ACPI_COMMON_NOTIFY_INFO \
180 union acpi_operand_object *notify_list[2]; /* Handlers for system/device notifies */\
181 union acpi_operand_object *handler; /* Handler for Address space */
182
183/* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
184
185struct acpi_object_notify_common {
186ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
187
188struct acpi_object_device {
189 ACPI_OBJECT_COMMON_HEADER
190 ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
191};
192
193struct acpi_object_power_resource {
194 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
195 u32 resource_order;
196};
197
198struct acpi_object_processor {
199 ACPI_OBJECT_COMMON_HEADER
200 /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
201 u8 proc_id;
202 u8 length;
203 ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
204};
205
206struct acpi_object_thermal_zone {
207ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
208
209/******************************************************************************
210 *
211 * Fields. All share a common header/info field.
212 *
213 *****************************************************************************/
214
215/*
216 * Common bitfield for the field objects
217 * "Field Datum" -- a datum from the actual field object
218 * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
219 */
220#define ACPI_COMMON_FIELD_INFO \
221 u8 field_flags; /* Access, update, and lock bits */\
222 u8 attribute; /* From access_as keyword */\
223 u8 access_byte_width; /* Read/Write size in bytes */\
224 struct acpi_namespace_node *node; /* Link back to parent node */\
225 u32 bit_length; /* Length of field in bits */\
226 u32 base_byte_offset; /* Byte offset within containing object */\
227 u32 value; /* Value to store into the Bank or Index register */\
228 u8 start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
229 u8 access_length; /* For serial regions/fields */
230
231
232/* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
233
234struct acpi_object_field_common {
235 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Parent Operation Region object (REGION/BANK fields only) */
236};
237
238struct acpi_object_region_field {
239 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u16 resource_length;
240 union acpi_operand_object *region_obj; /* Containing op_region object */
241 u8 *resource_buffer; /* resource_template for serial regions/fields */
242 u16 pin_number_index; /* Index relative to previous Connection/Template */
243 u8 *internal_pcc_buffer; /* Internal buffer for fields associated with PCC */
244};
245
246struct acpi_object_bank_field {
247 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj; /* Containing op_region object */
248 union acpi_operand_object *bank_obj; /* bank_select Register object */
249};
250
251struct acpi_object_index_field {
252 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
253 /*
254 * No "RegionObj" pointer needed since the Index and Data registers
255 * are each field definitions unto themselves.
256 */
257 union acpi_operand_object *index_obj; /* Index register */
258 union acpi_operand_object *data_obj; /* Data register */
259};
260
261/* The buffer_field is different in that it is part of a Buffer, not an op_region */
262
263struct acpi_object_buffer_field {
264 ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO u8 is_create_field; /* Special case for objects created by create_field() */
265 union acpi_operand_object *buffer_obj; /* Containing Buffer object */
266};
267
268/******************************************************************************
269 *
270 * Objects for handlers
271 *
272 *****************************************************************************/
273
274struct acpi_object_notify_handler {
275 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node; /* Parent device */
276 u32 handler_type; /* Type: Device/System/Both */
277 acpi_notify_handler handler; /* Handler address */
278 void *context;
279 union acpi_operand_object *next[2]; /* Device and System handler lists */
280};
281
282struct acpi_object_addr_handler {
283 ACPI_OBJECT_COMMON_HEADER u8 space_id;
284 u8 handler_flags;
285 acpi_adr_space_handler handler;
286 struct acpi_namespace_node *node; /* Parent device */
287 void *context;
288 acpi_mutex context_mutex;
289 acpi_adr_space_setup setup;
290 union acpi_operand_object *region_list; /* Regions using this handler */
291 union acpi_operand_object *next;
292};
293
294/* Flags for address handler (handler_flags) */
295
296#define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x01
297
298/******************************************************************************
299 *
300 * Special internal objects
301 *
302 *****************************************************************************/
303
304/*
305 * The Reference object is used for these opcodes:
306 * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
307 * The Reference.Class differentiates these types.
308 */
309struct acpi_object_reference {
310 ACPI_OBJECT_COMMON_HEADER u8 class; /* Reference Class */
311 u8 target_type; /* Used for Index Op */
312 u8 resolved; /* Reference has been resolved to a value */
313 void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
314 struct acpi_namespace_node *node; /* ref_of or Namepath */
315 union acpi_operand_object **where; /* Target of Index */
316 u8 *index_pointer; /* Used for Buffers and Strings */
317 u8 *aml; /* Used for deferred resolution of the ref */
318 u32 value; /* Used for Local/Arg/Index/ddb_handle */
319};
320
321/* Values for Reference.Class above */
322
323typedef enum {
324 ACPI_REFCLASS_LOCAL = 0, /* Method local */
325 ACPI_REFCLASS_ARG = 1, /* Method argument */
326 ACPI_REFCLASS_REFOF = 2, /* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
327 ACPI_REFCLASS_INDEX = 3, /* Result of Index() */
328 ACPI_REFCLASS_TABLE = 4, /* ddb_handle - Load(), load_table() */
329 ACPI_REFCLASS_NAME = 5, /* Reference to a named object */
330 ACPI_REFCLASS_DEBUG = 6, /* Debug object */
331
332 ACPI_REFCLASS_MAX = 6
333} ACPI_REFERENCE_CLASSES;
334
335/*
336 * Extra object is used as additional storage for types that
337 * have AML code in their declarations (term_args) that must be
338 * evaluated at run time.
339 *
340 * Currently: Region and field_unit types
341 */
342struct acpi_object_extra {
343 ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */
344 struct acpi_namespace_node *scope_node;
345 void *region_context; /* Region-specific data */
346 u8 *aml_start;
347 u32 aml_length;
348};
349
350/* Additional data that can be attached to namespace nodes */
351
352struct acpi_object_data {
353 ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
354 void *pointer;
355};
356
357/* Structure used when objects are cached for reuse */
358
359struct acpi_object_cache_list {
360 ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next; /* Link for object cache and internal lists */
361};
362
363/******************************************************************************
364 *
365 * union acpi_operand_object descriptor - a giant union of all of the above
366 *
367 *****************************************************************************/
368
369union acpi_operand_object {
370 struct acpi_object_common common;
371 struct acpi_object_integer integer;
372 struct acpi_object_string string;
373 struct acpi_object_buffer buffer;
374 struct acpi_object_package package;
375 struct acpi_object_event event;
376 struct acpi_object_method method;
377 struct acpi_object_mutex mutex;
378 struct acpi_object_region region;
379 struct acpi_object_notify_common common_notify;
380 struct acpi_object_device device;
381 struct acpi_object_power_resource power_resource;
382 struct acpi_object_processor processor;
383 struct acpi_object_thermal_zone thermal_zone;
384 struct acpi_object_field_common common_field;
385 struct acpi_object_region_field field;
386 struct acpi_object_buffer_field buffer_field;
387 struct acpi_object_bank_field bank_field;
388 struct acpi_object_index_field index_field;
389 struct acpi_object_notify_handler notify;
390 struct acpi_object_addr_handler address_space;
391 struct acpi_object_reference reference;
392 struct acpi_object_extra extra;
393 struct acpi_object_data data;
394 struct acpi_object_cache_list cache;
395
396 /*
397 * Add namespace node to union in order to simplify code that accepts both
398 * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
399 * a common descriptor_type field in order to differentiate them.
400 */
401 struct acpi_namespace_node node;
402};
403
404/******************************************************************************
405 *
406 * union acpi_descriptor - objects that share a common descriptor identifier
407 *
408 *****************************************************************************/
409
410/* Object descriptor types */
411
412#define ACPI_DESC_TYPE_CACHED 0x01 /* Used only when object is cached */
413#define ACPI_DESC_TYPE_STATE 0x02
414#define ACPI_DESC_TYPE_STATE_UPDATE 0x03
415#define ACPI_DESC_TYPE_STATE_PACKAGE 0x04
416#define ACPI_DESC_TYPE_STATE_CONTROL 0x05
417#define ACPI_DESC_TYPE_STATE_RPSCOPE 0x06
418#define ACPI_DESC_TYPE_STATE_PSCOPE 0x07
419#define ACPI_DESC_TYPE_STATE_WSCOPE 0x08
420#define ACPI_DESC_TYPE_STATE_RESULT 0x09
421#define ACPI_DESC_TYPE_STATE_NOTIFY 0x0A
422#define ACPI_DESC_TYPE_STATE_THREAD 0x0B
423#define ACPI_DESC_TYPE_WALK 0x0C
424#define ACPI_DESC_TYPE_PARSER 0x0D
425#define ACPI_DESC_TYPE_OPERAND 0x0E
426#define ACPI_DESC_TYPE_NAMED 0x0F
427#define ACPI_DESC_TYPE_MAX 0x0F
428
429struct acpi_common_descriptor {
430 void *common_pointer;
431 u8 descriptor_type; /* To differentiate various internal objs */
432};
433
434union acpi_descriptor {
435 struct acpi_common_descriptor common;
436 union acpi_operand_object object;
437 struct acpi_namespace_node node;
438 union acpi_parse_object op;
439};
440
441#pragma pack()
442
443#endif /* _ACOBJECT_H */
444

source code of linux/drivers/acpi/acpica/acobject.h