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9ad19ac4 BM |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsargs - Support for execution of dynamic arguments for static | |
4 | * objects (regions, fields, buffer fields, etc.) | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
9 | * Copyright (C) 2000 - 2011, Intel Corp. | |
10 | * All rights reserved. | |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include "accommon.h" | |
47 | #include "acparser.h" | |
48 | #include "amlcode.h" | |
49 | #include "acdispat.h" | |
50 | #include "acnamesp.h" | |
51 | ||
52 | #define _COMPONENT ACPI_DISPATCHER | |
53 | ACPI_MODULE_NAME("dsargs") | |
54 | ||
55 | /* Local prototypes */ | |
56 | static acpi_status | |
57 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, | |
58 | struct acpi_namespace_node *scope_node, | |
59 | u32 aml_length, u8 *aml_start); | |
60 | ||
61 | /******************************************************************************* | |
62 | * | |
63 | * FUNCTION: acpi_ds_execute_arguments | |
64 | * | |
65 | * PARAMETERS: Node - Object NS node | |
66 | * scope_node - Parent NS node | |
67 | * aml_length - Length of executable AML | |
68 | * aml_start - Pointer to the AML | |
69 | * | |
70 | * RETURN: Status. | |
71 | * | |
72 | * DESCRIPTION: Late (deferred) execution of region or field arguments | |
73 | * | |
74 | ******************************************************************************/ | |
75 | ||
76 | static acpi_status | |
77 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, | |
78 | struct acpi_namespace_node *scope_node, | |
79 | u32 aml_length, u8 *aml_start) | |
80 | { | |
81 | acpi_status status; | |
82 | union acpi_parse_object *op; | |
83 | struct acpi_walk_state *walk_state; | |
84 | ||
85 | ACPI_FUNCTION_TRACE(ds_execute_arguments); | |
86 | ||
87 | /* Allocate a new parser op to be the root of the parsed tree */ | |
88 | ||
89 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); | |
90 | if (!op) { | |
91 | return_ACPI_STATUS(AE_NO_MEMORY); | |
92 | } | |
93 | ||
94 | /* Save the Node for use in acpi_ps_parse_aml */ | |
95 | ||
96 | op->common.node = scope_node; | |
97 | ||
98 | /* Create and initialize a new parser state */ | |
99 | ||
100 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); | |
101 | if (!walk_state) { | |
102 | status = AE_NO_MEMORY; | |
103 | goto cleanup; | |
104 | } | |
105 | ||
106 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, | |
107 | aml_length, NULL, ACPI_IMODE_LOAD_PASS1); | |
108 | if (ACPI_FAILURE(status)) { | |
109 | acpi_ds_delete_walk_state(walk_state); | |
110 | goto cleanup; | |
111 | } | |
112 | ||
113 | /* Mark this parse as a deferred opcode */ | |
114 | ||
115 | walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP; | |
116 | walk_state->deferred_node = node; | |
117 | ||
118 | /* Pass1: Parse the entire declaration */ | |
119 | ||
120 | status = acpi_ps_parse_aml(walk_state); | |
121 | if (ACPI_FAILURE(status)) { | |
122 | goto cleanup; | |
123 | } | |
124 | ||
125 | /* Get and init the Op created above */ | |
126 | ||
127 | op->common.node = node; | |
128 | acpi_ps_delete_parse_tree(op); | |
129 | ||
130 | /* Evaluate the deferred arguments */ | |
131 | ||
132 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); | |
133 | if (!op) { | |
134 | return_ACPI_STATUS(AE_NO_MEMORY); | |
135 | } | |
136 | ||
137 | op->common.node = scope_node; | |
138 | ||
139 | /* Create and initialize a new parser state */ | |
140 | ||
141 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); | |
142 | if (!walk_state) { | |
143 | status = AE_NO_MEMORY; | |
144 | goto cleanup; | |
145 | } | |
146 | ||
147 | /* Execute the opcode and arguments */ | |
148 | ||
149 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, | |
150 | aml_length, NULL, ACPI_IMODE_EXECUTE); | |
151 | if (ACPI_FAILURE(status)) { | |
152 | acpi_ds_delete_walk_state(walk_state); | |
153 | goto cleanup; | |
154 | } | |
155 | ||
156 | /* Mark this execution as a deferred opcode */ | |
157 | ||
158 | walk_state->deferred_node = node; | |
159 | status = acpi_ps_parse_aml(walk_state); | |
160 | ||
161 | cleanup: | |
162 | acpi_ps_delete_parse_tree(op); | |
163 | return_ACPI_STATUS(status); | |
164 | } | |
165 | ||
166 | /******************************************************************************* | |
167 | * | |
168 | * FUNCTION: acpi_ds_get_buffer_field_arguments | |
169 | * | |
170 | * PARAMETERS: obj_desc - A valid buffer_field object | |
171 | * | |
172 | * RETURN: Status. | |
173 | * | |
174 | * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late | |
175 | * evaluation of these field attributes. | |
176 | * | |
177 | ******************************************************************************/ | |
178 | ||
179 | acpi_status | |
180 | acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc) | |
181 | { | |
182 | union acpi_operand_object *extra_desc; | |
183 | struct acpi_namespace_node *node; | |
184 | acpi_status status; | |
185 | ||
186 | ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc); | |
187 | ||
188 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
189 | return_ACPI_STATUS(AE_OK); | |
190 | } | |
191 | ||
192 | /* Get the AML pointer (method object) and buffer_field node */ | |
193 | ||
194 | extra_desc = acpi_ns_get_secondary_object(obj_desc); | |
195 | node = obj_desc->buffer_field.node; | |
196 | ||
197 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname(ACPI_TYPE_BUFFER_FIELD, | |
198 | node, NULL)); | |
199 | ||
200 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n", | |
201 | acpi_ut_get_node_name(node))); | |
202 | ||
203 | /* Execute the AML code for the term_arg arguments */ | |
204 | ||
205 | status = acpi_ds_execute_arguments(node, node->parent, | |
206 | extra_desc->extra.aml_length, | |
207 | extra_desc->extra.aml_start); | |
208 | return_ACPI_STATUS(status); | |
209 | } | |
210 | ||
211 | /******************************************************************************* | |
212 | * | |
213 | * FUNCTION: acpi_ds_get_bank_field_arguments | |
214 | * | |
215 | * PARAMETERS: obj_desc - A valid bank_field object | |
216 | * | |
217 | * RETURN: Status. | |
218 | * | |
219 | * DESCRIPTION: Get bank_field bank_value. This implements the late | |
220 | * evaluation of these field attributes. | |
221 | * | |
222 | ******************************************************************************/ | |
223 | ||
224 | acpi_status | |
225 | acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc) | |
226 | { | |
227 | union acpi_operand_object *extra_desc; | |
228 | struct acpi_namespace_node *node; | |
229 | acpi_status status; | |
230 | ||
231 | ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc); | |
232 | ||
233 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
234 | return_ACPI_STATUS(AE_OK); | |
235 | } | |
236 | ||
237 | /* Get the AML pointer (method object) and bank_field node */ | |
238 | ||
239 | extra_desc = acpi_ns_get_secondary_object(obj_desc); | |
240 | node = obj_desc->bank_field.node; | |
241 | ||
242 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname | |
243 | (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL)); | |
244 | ||
245 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n", | |
246 | acpi_ut_get_node_name(node))); | |
247 | ||
248 | /* Execute the AML code for the term_arg arguments */ | |
249 | ||
250 | status = acpi_ds_execute_arguments(node, node->parent, | |
251 | extra_desc->extra.aml_length, | |
252 | extra_desc->extra.aml_start); | |
253 | return_ACPI_STATUS(status); | |
254 | } | |
255 | ||
256 | /******************************************************************************* | |
257 | * | |
258 | * FUNCTION: acpi_ds_get_buffer_arguments | |
259 | * | |
260 | * PARAMETERS: obj_desc - A valid Buffer object | |
261 | * | |
262 | * RETURN: Status. | |
263 | * | |
264 | * DESCRIPTION: Get Buffer length and initializer byte list. This implements | |
265 | * the late evaluation of these attributes. | |
266 | * | |
267 | ******************************************************************************/ | |
268 | ||
269 | acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc) | |
270 | { | |
271 | struct acpi_namespace_node *node; | |
272 | acpi_status status; | |
273 | ||
274 | ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc); | |
275 | ||
276 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
277 | return_ACPI_STATUS(AE_OK); | |
278 | } | |
279 | ||
280 | /* Get the Buffer node */ | |
281 | ||
282 | node = obj_desc->buffer.node; | |
283 | if (!node) { | |
284 | ACPI_ERROR((AE_INFO, | |
285 | "No pointer back to namespace node in buffer object %p", | |
286 | obj_desc)); | |
287 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
288 | } | |
289 | ||
290 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n")); | |
291 | ||
292 | /* Execute the AML code for the term_arg arguments */ | |
293 | ||
294 | status = acpi_ds_execute_arguments(node, node, | |
295 | obj_desc->buffer.aml_length, | |
296 | obj_desc->buffer.aml_start); | |
297 | return_ACPI_STATUS(status); | |
298 | } | |
299 | ||
300 | /******************************************************************************* | |
301 | * | |
302 | * FUNCTION: acpi_ds_get_package_arguments | |
303 | * | |
304 | * PARAMETERS: obj_desc - A valid Package object | |
305 | * | |
306 | * RETURN: Status. | |
307 | * | |
308 | * DESCRIPTION: Get Package length and initializer byte list. This implements | |
309 | * the late evaluation of these attributes. | |
310 | * | |
311 | ******************************************************************************/ | |
312 | ||
313 | acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc) | |
314 | { | |
315 | struct acpi_namespace_node *node; | |
316 | acpi_status status; | |
317 | ||
318 | ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc); | |
319 | ||
320 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
321 | return_ACPI_STATUS(AE_OK); | |
322 | } | |
323 | ||
324 | /* Get the Package node */ | |
325 | ||
326 | node = obj_desc->package.node; | |
327 | if (!node) { | |
328 | ACPI_ERROR((AE_INFO, | |
329 | "No pointer back to namespace node in package %p", | |
330 | obj_desc)); | |
331 | return_ACPI_STATUS(AE_AML_INTERNAL); | |
332 | } | |
333 | ||
334 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n")); | |
335 | ||
336 | /* Execute the AML code for the term_arg arguments */ | |
337 | ||
338 | status = acpi_ds_execute_arguments(node, node, | |
339 | obj_desc->package.aml_length, | |
340 | obj_desc->package.aml_start); | |
341 | return_ACPI_STATUS(status); | |
342 | } | |
343 | ||
344 | /******************************************************************************* | |
345 | * | |
346 | * FUNCTION: acpi_ds_get_region_arguments | |
347 | * | |
348 | * PARAMETERS: obj_desc - A valid region object | |
349 | * | |
350 | * RETURN: Status. | |
351 | * | |
352 | * DESCRIPTION: Get region address and length. This implements the late | |
353 | * evaluation of these region attributes. | |
354 | * | |
355 | ******************************************************************************/ | |
356 | ||
357 | acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) | |
358 | { | |
359 | struct acpi_namespace_node *node; | |
360 | acpi_status status; | |
361 | union acpi_operand_object *extra_desc; | |
362 | ||
363 | ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc); | |
364 | ||
365 | if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { | |
366 | return_ACPI_STATUS(AE_OK); | |
367 | } | |
368 | ||
369 | extra_desc = acpi_ns_get_secondary_object(obj_desc); | |
370 | if (!extra_desc) { | |
371 | return_ACPI_STATUS(AE_NOT_EXIST); | |
372 | } | |
373 | ||
374 | /* Get the Region node */ | |
375 | ||
376 | node = obj_desc->region.node; | |
377 | ||
378 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname | |
379 | (ACPI_TYPE_REGION, node, NULL)); | |
380 | ||
381 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n", | |
382 | acpi_ut_get_node_name(node), | |
383 | extra_desc->extra.aml_start)); | |
384 | ||
385 | /* Execute the argument AML */ | |
386 | ||
387 | status = acpi_ds_execute_arguments(node, node->parent, | |
388 | extra_desc->extra.aml_length, | |
389 | extra_desc->extra.aml_start); | |
da4d8b28 LM |
390 | if (ACPI_FAILURE(status)) { |
391 | return_ACPI_STATUS(status); | |
392 | } | |
393 | ||
394 | /* Validate the region address/length via the host OS */ | |
395 | ||
396 | status = acpi_os_validate_address(obj_desc->region.space_id, | |
397 | obj_desc->region.address, | |
398 | (acpi_size) obj_desc->region.length, | |
399 | acpi_ut_get_node_name(node)); | |
400 | ||
401 | if (ACPI_FAILURE(status)) { | |
402 | /* | |
403 | * Invalid address/length. We will emit an error message and mark | |
404 | * the region as invalid, so that it will cause an additional error if | |
405 | * it is ever used. Then return AE_OK. | |
406 | */ | |
407 | ACPI_EXCEPTION((AE_INFO, status, | |
408 | "During address validation of OpRegion [%4.4s]", | |
409 | node->name.ascii)); | |
410 | obj_desc->common.flags |= AOPOBJ_INVALID; | |
411 | status = AE_OK; | |
412 | } | |
413 | ||
9ad19ac4 BM |
414 | return_ACPI_STATUS(status); |
415 | } |