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 - 2020, 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};
142
143struct 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
184struct acpi_object_notify_common {
185ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
186
187struct acpi_object_device {
188	ACPI_OBJECT_COMMON_HEADER
189	    ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
190};
191
192struct acpi_object_power_resource {
193	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
194	u32 resource_order;
195};
196
197struct 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
205struct acpi_object_thermal_zone {
206ACPI_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
233struct 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
237struct 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
245struct 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
250struct 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
262struct 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
273struct 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
281struct 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 */
308struct 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
322typedef 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 */
341struct 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
351struct 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
358struct 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
368union 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
428struct acpi_common_descriptor {
429	void *common_pointer;
430	u8 descriptor_type;	/* To differentiate various internal objs */
431};
432
433union 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