1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 /******************************************************************************
3 *
4 * Module Name: dsargs - Support for execution of dynamic arguments for static
5 * objects (regions, fields, buffer fields, etc.)
6 *
7 * Copyright (C) 2000 - 2018, Intel Corp.
8 *
9 *****************************************************************************/
10
11 #include <acpi/acpi.h>
12 #include "accommon.h"
13 #include "acparser.h"
14 #include "amlcode.h"
15 #include "acdispat.h"
16 #include "acnamesp.h"
17
18 #define _COMPONENT ACPI_DISPATCHER
19 ACPI_MODULE_NAME("dsargs")
20
21 /* Local prototypes */
22 static acpi_status
23 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
24 struct acpi_namespace_node *scope_node,
25 u32 aml_length, u8 *aml_start);
26
27 /*******************************************************************************
28 *
29 * FUNCTION: acpi_ds_execute_arguments
30 *
31 * PARAMETERS: node - Object NS node
32 * scope_node - Parent NS node
33 * aml_length - Length of executable AML
34 * aml_start - Pointer to the AML
35 *
36 * RETURN: Status.
37 *
38 * DESCRIPTION: Late (deferred) execution of region or field arguments
39 *
40 ******************************************************************************/
41
42 static acpi_status
acpi_ds_execute_arguments(struct acpi_namespace_node * node,struct acpi_namespace_node * scope_node,u32 aml_length,u8 * aml_start)43 acpi_ds_execute_arguments(struct acpi_namespace_node *node,
44 struct acpi_namespace_node *scope_node,
45 u32 aml_length, u8 *aml_start)
46 {
47 acpi_status status;
48 union acpi_parse_object *op;
49 struct acpi_walk_state *walk_state;
50
51 ACPI_FUNCTION_TRACE_PTR(ds_execute_arguments, aml_start);
52
53 /* Allocate a new parser op to be the root of the parsed tree */
54
55 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP, aml_start);
56 if (!op) {
57 return_ACPI_STATUS(AE_NO_MEMORY);
58 }
59
60 /* Save the Node for use in acpi_ps_parse_aml */
61
62 op->common.node = scope_node;
63
64 /* Create and initialize a new parser state */
65
66 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
67 if (!walk_state) {
68 status = AE_NO_MEMORY;
69 goto cleanup;
70 }
71
72 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
73 aml_length, NULL, ACPI_IMODE_LOAD_PASS1);
74 if (ACPI_FAILURE(status)) {
75 acpi_ds_delete_walk_state(walk_state);
76 goto cleanup;
77 }
78
79 /* Mark this parse as a deferred opcode */
80
81 walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP;
82 walk_state->deferred_node = node;
83
84 /* Pass1: Parse the entire declaration */
85
86 status = acpi_ps_parse_aml(walk_state);
87 if (ACPI_FAILURE(status)) {
88 goto cleanup;
89 }
90
91 /* Get and init the Op created above */
92
93 op->common.node = node;
94 acpi_ps_delete_parse_tree(op);
95
96 /* Evaluate the deferred arguments */
97
98 op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP, aml_start);
99 if (!op) {
100 return_ACPI_STATUS(AE_NO_MEMORY);
101 }
102
103 op->common.node = scope_node;
104
105 /* Create and initialize a new parser state */
106
107 walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL);
108 if (!walk_state) {
109 status = AE_NO_MEMORY;
110 goto cleanup;
111 }
112
113 /* Execute the opcode and arguments */
114
115 status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start,
116 aml_length, NULL, ACPI_IMODE_EXECUTE);
117 if (ACPI_FAILURE(status)) {
118 acpi_ds_delete_walk_state(walk_state);
119 goto cleanup;
120 }
121
122 /* Mark this execution as a deferred opcode */
123
124 walk_state->deferred_node = node;
125 status = acpi_ps_parse_aml(walk_state);
126
127 cleanup:
128 acpi_ps_delete_parse_tree(op);
129 return_ACPI_STATUS(status);
130 }
131
132 /*******************************************************************************
133 *
134 * FUNCTION: acpi_ds_get_buffer_field_arguments
135 *
136 * PARAMETERS: obj_desc - A valid buffer_field object
137 *
138 * RETURN: Status.
139 *
140 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
141 * evaluation of these field attributes.
142 *
143 ******************************************************************************/
144
145 acpi_status
acpi_ds_get_buffer_field_arguments(union acpi_operand_object * obj_desc)146 acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc)
147 {
148 union acpi_operand_object *extra_desc;
149 struct acpi_namespace_node *node;
150 acpi_status status;
151
152 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc);
153
154 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
155 return_ACPI_STATUS(AE_OK);
156 }
157
158 /* Get the AML pointer (method object) and buffer_field node */
159
160 extra_desc = acpi_ns_get_secondary_object(obj_desc);
161 node = obj_desc->buffer_field.node;
162
163 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
164 (ACPI_TYPE_BUFFER_FIELD, node, NULL));
165
166 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n",
167 acpi_ut_get_node_name(node)));
168
169 /* Execute the AML code for the term_arg arguments */
170
171 status = acpi_ds_execute_arguments(node, node->parent,
172 extra_desc->extra.aml_length,
173 extra_desc->extra.aml_start);
174 return_ACPI_STATUS(status);
175 }
176
177 /*******************************************************************************
178 *
179 * FUNCTION: acpi_ds_get_bank_field_arguments
180 *
181 * PARAMETERS: obj_desc - A valid bank_field object
182 *
183 * RETURN: Status.
184 *
185 * DESCRIPTION: Get bank_field bank_value. This implements the late
186 * evaluation of these field attributes.
187 *
188 ******************************************************************************/
189
190 acpi_status
acpi_ds_get_bank_field_arguments(union acpi_operand_object * obj_desc)191 acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc)
192 {
193 union acpi_operand_object *extra_desc;
194 struct acpi_namespace_node *node;
195 acpi_status status;
196
197 ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc);
198
199 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
200 return_ACPI_STATUS(AE_OK);
201 }
202
203 /* Get the AML pointer (method object) and bank_field node */
204
205 extra_desc = acpi_ns_get_secondary_object(obj_desc);
206 node = obj_desc->bank_field.node;
207
208 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
209 (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL));
210
211 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n",
212 acpi_ut_get_node_name(node)));
213
214 /* Execute the AML code for the term_arg arguments */
215
216 status = acpi_ds_execute_arguments(node, node->parent,
217 extra_desc->extra.aml_length,
218 extra_desc->extra.aml_start);
219 if (ACPI_FAILURE(status)) {
220 return_ACPI_STATUS(status);
221 }
222
223 status = acpi_ut_add_address_range(obj_desc->region.space_id,
224 obj_desc->region.address,
225 obj_desc->region.length, node);
226 return_ACPI_STATUS(status);
227 }
228
229 /*******************************************************************************
230 *
231 * FUNCTION: acpi_ds_get_buffer_arguments
232 *
233 * PARAMETERS: obj_desc - A valid Buffer object
234 *
235 * RETURN: Status.
236 *
237 * DESCRIPTION: Get Buffer length and initializer byte list. This implements
238 * the late evaluation of these attributes.
239 *
240 ******************************************************************************/
241
acpi_ds_get_buffer_arguments(union acpi_operand_object * obj_desc)242 acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc)
243 {
244 struct acpi_namespace_node *node;
245 acpi_status status;
246
247 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc);
248
249 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
250 return_ACPI_STATUS(AE_OK);
251 }
252
253 /* Get the Buffer node */
254
255 node = obj_desc->buffer.node;
256 if (!node) {
257 ACPI_ERROR((AE_INFO,
258 "No pointer back to namespace node in buffer object %p",
259 obj_desc));
260 return_ACPI_STATUS(AE_AML_INTERNAL);
261 }
262
263 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n"));
264
265 /* Execute the AML code for the term_arg arguments */
266
267 status = acpi_ds_execute_arguments(node, node,
268 obj_desc->buffer.aml_length,
269 obj_desc->buffer.aml_start);
270 return_ACPI_STATUS(status);
271 }
272
273 /*******************************************************************************
274 *
275 * FUNCTION: acpi_ds_get_package_arguments
276 *
277 * PARAMETERS: obj_desc - A valid Package object
278 *
279 * RETURN: Status.
280 *
281 * DESCRIPTION: Get Package length and initializer byte list. This implements
282 * the late evaluation of these attributes.
283 *
284 ******************************************************************************/
285
acpi_ds_get_package_arguments(union acpi_operand_object * obj_desc)286 acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc)
287 {
288 struct acpi_namespace_node *node;
289 acpi_status status;
290
291 ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc);
292
293 if (obj_desc->common.flags & AOPOBJ_DATA_VALID) {
294 return_ACPI_STATUS(AE_OK);
295 }
296
297 /* Get the Package node */
298
299 node = obj_desc->package.node;
300 if (!node) {
301 ACPI_ERROR((AE_INFO,
302 "No pointer back to namespace node in package %p",
303 obj_desc));
304 return_ACPI_STATUS(AE_AML_INTERNAL);
305 }
306
307 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Argument Init, AML Ptr: %p\n",
308 obj_desc->package.aml_start));
309
310 /* Execute the AML code for the term_arg arguments */
311
312 status = acpi_ds_execute_arguments(node, node,
313 obj_desc->package.aml_length,
314 obj_desc->package.aml_start);
315
316 return_ACPI_STATUS(status);
317 }
318
319 /*******************************************************************************
320 *
321 * FUNCTION: acpi_ds_get_region_arguments
322 *
323 * PARAMETERS: obj_desc - A valid region object
324 *
325 * RETURN: Status.
326 *
327 * DESCRIPTION: Get region address and length. This implements the late
328 * evaluation of these region attributes.
329 *
330 ******************************************************************************/
331
acpi_ds_get_region_arguments(union acpi_operand_object * obj_desc)332 acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc)
333 {
334 struct acpi_namespace_node *node;
335 acpi_status status;
336 union acpi_operand_object *extra_desc;
337
338 ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc);
339
340 if (obj_desc->region.flags & AOPOBJ_DATA_VALID) {
341 return_ACPI_STATUS(AE_OK);
342 }
343
344 extra_desc = acpi_ns_get_secondary_object(obj_desc);
345 if (!extra_desc) {
346 return_ACPI_STATUS(AE_NOT_EXIST);
347 }
348
349 /* Get the Region node */
350
351 node = obj_desc->region.node;
352
353 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
354 (ACPI_TYPE_REGION, node, NULL));
355
356 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
357 "[%4.4s] OpRegion Arg Init at AML %p\n",
358 acpi_ut_get_node_name(node),
359 extra_desc->extra.aml_start));
360
361 /* Execute the argument AML */
362
363 status = acpi_ds_execute_arguments(node, extra_desc->extra.scope_node,
364 extra_desc->extra.aml_length,
365 extra_desc->extra.aml_start);
366 if (ACPI_FAILURE(status)) {
367 return_ACPI_STATUS(status);
368 }
369
370 status = acpi_ut_add_address_range(obj_desc->region.space_id,
371 obj_desc->region.address,
372 obj_desc->region.length, node);
373 return_ACPI_STATUS(status);
374 }
375
