Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsopcode - Dispatcher Op Region support and handling of | |
4 | * "control" opcodes | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 LT |
45 | #include <acpi/acpi.h> |
46 | #include <acpi/acparser.h> | |
47 | #include <acpi/amlcode.h> | |
48 | #include <acpi/acdispat.h> | |
49 | #include <acpi/acinterp.h> | |
50 | #include <acpi/acnamesp.h> | |
51 | #include <acpi/acevents.h> | |
941f48bb | 52 | #include <acpi/actables.h> |
1da177e4 LT |
53 | |
54 | #define _COMPONENT ACPI_DISPATCHER | |
4be44fcd | 55 | ACPI_MODULE_NAME("dsopcode") |
1da177e4 | 56 | |
44f6c012 | 57 | /* Local prototypes */ |
44f6c012 | 58 | static acpi_status |
4be44fcd LB |
59 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, |
60 | struct acpi_namespace_node *scope_node, | |
61 | u32 aml_length, u8 * aml_start); | |
44f6c012 RM |
62 | |
63 | static acpi_status | |
4be44fcd LB |
64 | acpi_ds_init_buffer_field(u16 aml_opcode, |
65 | union acpi_operand_object *obj_desc, | |
66 | union acpi_operand_object *buffer_desc, | |
67 | union acpi_operand_object *offset_desc, | |
68 | union acpi_operand_object *length_desc, | |
69 | union acpi_operand_object *result_desc); | |
44f6c012 RM |
70 | |
71 | /******************************************************************************* | |
1da177e4 LT |
72 | * |
73 | * FUNCTION: acpi_ds_execute_arguments | |
74 | * | |
44f6c012 RM |
75 | * PARAMETERS: Node - Object NS node |
76 | * scope_node - Parent NS node | |
1da177e4 LT |
77 | * aml_length - Length of executable AML |
78 | * aml_start - Pointer to the AML | |
79 | * | |
80 | * RETURN: Status. | |
81 | * | |
82 | * DESCRIPTION: Late (deferred) execution of region or field arguments | |
83 | * | |
44f6c012 | 84 | ******************************************************************************/ |
1da177e4 | 85 | |
44f6c012 | 86 | static acpi_status |
4be44fcd LB |
87 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, |
88 | struct acpi_namespace_node *scope_node, | |
89 | u32 aml_length, u8 * aml_start) | |
1da177e4 | 90 | { |
4be44fcd LB |
91 | acpi_status status; |
92 | union acpi_parse_object *op; | |
93 | struct acpi_walk_state *walk_state; | |
1da177e4 | 94 | |
b229cf92 | 95 | ACPI_FUNCTION_TRACE(ds_execute_arguments); |
1da177e4 LT |
96 | |
97 | /* | |
98 | * Allocate a new parser op to be the root of the parsed tree | |
99 | */ | |
4be44fcd | 100 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); |
1da177e4 | 101 | if (!op) { |
4be44fcd | 102 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
103 | } |
104 | ||
105 | /* Save the Node for use in acpi_ps_parse_aml */ | |
106 | ||
107 | op->common.node = scope_node; | |
108 | ||
109 | /* Create and initialize a new parser state */ | |
110 | ||
4be44fcd | 111 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); |
1da177e4 | 112 | if (!walk_state) { |
88ac00f5 RM |
113 | status = AE_NO_MEMORY; |
114 | goto cleanup; | |
1da177e4 LT |
115 | } |
116 | ||
4be44fcd | 117 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
ec3153fb | 118 | aml_length, NULL, ACPI_IMODE_LOAD_PASS1); |
4be44fcd LB |
119 | if (ACPI_FAILURE(status)) { |
120 | acpi_ds_delete_walk_state(walk_state); | |
88ac00f5 | 121 | goto cleanup; |
1da177e4 LT |
122 | } |
123 | ||
124 | /* Mark this parse as a deferred opcode */ | |
125 | ||
126 | walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP; | |
127 | walk_state->deferred_node = node; | |
128 | ||
129 | /* Pass1: Parse the entire declaration */ | |
130 | ||
4be44fcd LB |
131 | status = acpi_ps_parse_aml(walk_state); |
132 | if (ACPI_FAILURE(status)) { | |
88ac00f5 | 133 | goto cleanup; |
1da177e4 LT |
134 | } |
135 | ||
136 | /* Get and init the Op created above */ | |
137 | ||
138 | op->common.node = node; | |
4be44fcd | 139 | acpi_ps_delete_parse_tree(op); |
1da177e4 LT |
140 | |
141 | /* Evaluate the deferred arguments */ | |
142 | ||
4be44fcd | 143 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); |
1da177e4 | 144 | if (!op) { |
4be44fcd | 145 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
146 | } |
147 | ||
148 | op->common.node = scope_node; | |
149 | ||
150 | /* Create and initialize a new parser state */ | |
151 | ||
4be44fcd | 152 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); |
1da177e4 | 153 | if (!walk_state) { |
88ac00f5 RM |
154 | status = AE_NO_MEMORY; |
155 | goto cleanup; | |
1da177e4 LT |
156 | } |
157 | ||
158 | /* Execute the opcode and arguments */ | |
159 | ||
4be44fcd | 160 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
ec3153fb | 161 | aml_length, NULL, ACPI_IMODE_EXECUTE); |
4be44fcd LB |
162 | if (ACPI_FAILURE(status)) { |
163 | acpi_ds_delete_walk_state(walk_state); | |
88ac00f5 | 164 | goto cleanup; |
1da177e4 LT |
165 | } |
166 | ||
167 | /* Mark this execution as a deferred opcode */ | |
168 | ||
169 | walk_state->deferred_node = node; | |
4be44fcd | 170 | status = acpi_ps_parse_aml(walk_state); |
88ac00f5 | 171 | |
4be44fcd LB |
172 | cleanup: |
173 | acpi_ps_delete_parse_tree(op); | |
174 | return_ACPI_STATUS(status); | |
1da177e4 LT |
175 | } |
176 | ||
44f6c012 | 177 | /******************************************************************************* |
1da177e4 LT |
178 | * |
179 | * FUNCTION: acpi_ds_get_buffer_field_arguments | |
180 | * | |
181 | * PARAMETERS: obj_desc - A valid buffer_field object | |
182 | * | |
183 | * RETURN: Status. | |
184 | * | |
185 | * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late | |
186 | * evaluation of these field attributes. | |
187 | * | |
44f6c012 | 188 | ******************************************************************************/ |
1da177e4 LT |
189 | |
190 | acpi_status | |
4be44fcd | 191 | acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 192 | { |
4be44fcd LB |
193 | union acpi_operand_object *extra_desc; |
194 | struct acpi_namespace_node *node; | |
195 | acpi_status status; | |
1da177e4 | 196 | |
b229cf92 | 197 | ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments, obj_desc); |
1da177e4 LT |
198 | |
199 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 200 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
201 | } |
202 | ||
203 | /* Get the AML pointer (method object) and buffer_field node */ | |
204 | ||
4be44fcd | 205 | extra_desc = acpi_ns_get_secondary_object(obj_desc); |
1da177e4 LT |
206 | node = obj_desc->buffer_field.node; |
207 | ||
4be44fcd LB |
208 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
209 | (ACPI_TYPE_BUFFER_FIELD, node, NULL)); | |
b229cf92 | 210 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n", |
4be44fcd | 211 | acpi_ut_get_node_name(node))); |
1da177e4 LT |
212 | |
213 | /* Execute the AML code for the term_arg arguments */ | |
214 | ||
4be44fcd LB |
215 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), |
216 | extra_desc->extra.aml_length, | |
217 | extra_desc->extra.aml_start); | |
218 | return_ACPI_STATUS(status); | |
1da177e4 LT |
219 | } |
220 | ||
ef805d95 LM |
221 | /******************************************************************************* |
222 | * | |
223 | * FUNCTION: acpi_ds_get_bank_field_arguments | |
224 | * | |
225 | * PARAMETERS: obj_desc - A valid bank_field object | |
226 | * | |
227 | * RETURN: Status. | |
228 | * | |
229 | * DESCRIPTION: Get bank_field bank_value. This implements the late | |
230 | * evaluation of these field attributes. | |
231 | * | |
232 | ******************************************************************************/ | |
233 | ||
234 | acpi_status | |
235 | acpi_ds_get_bank_field_arguments(union acpi_operand_object *obj_desc) | |
236 | { | |
237 | union acpi_operand_object *extra_desc; | |
238 | struct acpi_namespace_node *node; | |
239 | acpi_status status; | |
240 | ||
241 | ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments, obj_desc); | |
242 | ||
243 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
244 | return_ACPI_STATUS(AE_OK); | |
245 | } | |
246 | ||
247 | /* Get the AML pointer (method object) and bank_field node */ | |
248 | ||
249 | extra_desc = acpi_ns_get_secondary_object(obj_desc); | |
250 | node = obj_desc->bank_field.node; | |
251 | ||
252 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname | |
253 | (ACPI_TYPE_LOCAL_BANK_FIELD, node, NULL)); | |
254 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BankField Arg Init\n", | |
255 | acpi_ut_get_node_name(node))); | |
256 | ||
257 | /* Execute the AML code for the term_arg arguments */ | |
258 | ||
259 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), | |
260 | extra_desc->extra.aml_length, | |
261 | extra_desc->extra.aml_start); | |
262 | return_ACPI_STATUS(status); | |
263 | } | |
264 | ||
44f6c012 | 265 | /******************************************************************************* |
1da177e4 LT |
266 | * |
267 | * FUNCTION: acpi_ds_get_buffer_arguments | |
268 | * | |
269 | * PARAMETERS: obj_desc - A valid Buffer object | |
270 | * | |
271 | * RETURN: Status. | |
272 | * | |
273 | * DESCRIPTION: Get Buffer length and initializer byte list. This implements | |
274 | * the late evaluation of these attributes. | |
275 | * | |
44f6c012 | 276 | ******************************************************************************/ |
1da177e4 | 277 | |
4be44fcd | 278 | acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 279 | { |
4be44fcd LB |
280 | struct acpi_namespace_node *node; |
281 | acpi_status status; | |
1da177e4 | 282 | |
b229cf92 | 283 | ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments, obj_desc); |
1da177e4 LT |
284 | |
285 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 286 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
287 | } |
288 | ||
289 | /* Get the Buffer node */ | |
290 | ||
291 | node = obj_desc->buffer.node; | |
292 | if (!node) { | |
b8e4d893 BM |
293 | ACPI_ERROR((AE_INFO, |
294 | "No pointer back to NS node in buffer obj %p", | |
295 | obj_desc)); | |
4be44fcd | 296 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
297 | } |
298 | ||
4be44fcd | 299 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n")); |
1da177e4 LT |
300 | |
301 | /* Execute the AML code for the term_arg arguments */ | |
302 | ||
4be44fcd LB |
303 | status = acpi_ds_execute_arguments(node, node, |
304 | obj_desc->buffer.aml_length, | |
305 | obj_desc->buffer.aml_start); | |
306 | return_ACPI_STATUS(status); | |
1da177e4 LT |
307 | } |
308 | ||
44f6c012 | 309 | /******************************************************************************* |
1da177e4 LT |
310 | * |
311 | * FUNCTION: acpi_ds_get_package_arguments | |
312 | * | |
313 | * PARAMETERS: obj_desc - A valid Package object | |
314 | * | |
315 | * RETURN: Status. | |
316 | * | |
317 | * DESCRIPTION: Get Package length and initializer byte list. This implements | |
318 | * the late evaluation of these attributes. | |
319 | * | |
44f6c012 | 320 | ******************************************************************************/ |
1da177e4 | 321 | |
4be44fcd | 322 | acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 323 | { |
4be44fcd LB |
324 | struct acpi_namespace_node *node; |
325 | acpi_status status; | |
1da177e4 | 326 | |
b229cf92 | 327 | ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments, obj_desc); |
1da177e4 LT |
328 | |
329 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 330 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
331 | } |
332 | ||
333 | /* Get the Package node */ | |
334 | ||
335 | node = obj_desc->package.node; | |
336 | if (!node) { | |
b8e4d893 BM |
337 | ACPI_ERROR((AE_INFO, |
338 | "No pointer back to NS node in package %p", | |
339 | obj_desc)); | |
4be44fcd | 340 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
341 | } |
342 | ||
4be44fcd | 343 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n")); |
1da177e4 LT |
344 | |
345 | /* Execute the AML code for the term_arg arguments */ | |
346 | ||
4be44fcd LB |
347 | status = acpi_ds_execute_arguments(node, node, |
348 | obj_desc->package.aml_length, | |
349 | obj_desc->package.aml_start); | |
350 | return_ACPI_STATUS(status); | |
1da177e4 LT |
351 | } |
352 | ||
1da177e4 LT |
353 | /***************************************************************************** |
354 | * | |
355 | * FUNCTION: acpi_ds_get_region_arguments | |
356 | * | |
357 | * PARAMETERS: obj_desc - A valid region object | |
358 | * | |
359 | * RETURN: Status. | |
360 | * | |
361 | * DESCRIPTION: Get region address and length. This implements the late | |
362 | * evaluation of these region attributes. | |
363 | * | |
364 | ****************************************************************************/ | |
365 | ||
4be44fcd | 366 | acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 367 | { |
4be44fcd LB |
368 | struct acpi_namespace_node *node; |
369 | acpi_status status; | |
370 | union acpi_operand_object *extra_desc; | |
1da177e4 | 371 | |
b229cf92 | 372 | ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments, obj_desc); |
1da177e4 LT |
373 | |
374 | if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 375 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
376 | } |
377 | ||
4be44fcd | 378 | extra_desc = acpi_ns_get_secondary_object(obj_desc); |
1da177e4 | 379 | if (!extra_desc) { |
4be44fcd | 380 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
381 | } |
382 | ||
383 | /* Get the Region node */ | |
384 | ||
385 | node = obj_desc->region.node; | |
386 | ||
4be44fcd LB |
387 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
388 | (ACPI_TYPE_REGION, node, NULL)); | |
1da177e4 | 389 | |
b229cf92 | 390 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n", |
4be44fcd LB |
391 | acpi_ut_get_node_name(node), |
392 | extra_desc->extra.aml_start)); | |
1da177e4 LT |
393 | |
394 | /* Execute the argument AML */ | |
395 | ||
4be44fcd LB |
396 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), |
397 | extra_desc->extra.aml_length, | |
398 | extra_desc->extra.aml_start); | |
b229cf92 BM |
399 | if (ACPI_FAILURE(status)) { |
400 | return_ACPI_STATUS(status); | |
401 | } | |
402 | ||
403 | /* Validate the region address/length via the host OS */ | |
404 | ||
405 | status = acpi_os_validate_address(obj_desc->region.space_id, | |
406 | obj_desc->region.address, | |
df92e695 TR |
407 | (acpi_size) obj_desc->region.length, |
408 | acpi_ut_get_node_name(node)); | |
409 | ||
b229cf92 BM |
410 | if (ACPI_FAILURE(status)) { |
411 | /* | |
412 | * Invalid address/length. We will emit an error message and mark | |
413 | * the region as invalid, so that it will cause an additional error if | |
414 | * it is ever used. Then return AE_OK. | |
415 | */ | |
416 | ACPI_EXCEPTION((AE_INFO, status, | |
417 | "During address validation of OpRegion [%4.4s]", | |
418 | node->name.ascii)); | |
419 | obj_desc->common.flags |= AOPOBJ_INVALID; | |
420 | status = AE_OK; | |
421 | } | |
422 | ||
4be44fcd | 423 | return_ACPI_STATUS(status); |
1da177e4 LT |
424 | } |
425 | ||
44f6c012 | 426 | /******************************************************************************* |
1da177e4 LT |
427 | * |
428 | * FUNCTION: acpi_ds_initialize_region | |
429 | * | |
44f6c012 | 430 | * PARAMETERS: obj_handle - Region namespace node |
1da177e4 LT |
431 | * |
432 | * RETURN: Status | |
433 | * | |
434 | * DESCRIPTION: Front end to ev_initialize_region | |
435 | * | |
44f6c012 | 436 | ******************************************************************************/ |
1da177e4 | 437 | |
4be44fcd | 438 | acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) |
1da177e4 | 439 | { |
4be44fcd LB |
440 | union acpi_operand_object *obj_desc; |
441 | acpi_status status; | |
1da177e4 | 442 | |
4be44fcd | 443 | obj_desc = acpi_ns_get_attached_object(obj_handle); |
1da177e4 LT |
444 | |
445 | /* Namespace is NOT locked */ | |
446 | ||
4be44fcd | 447 | status = acpi_ev_initialize_region(obj_desc, FALSE); |
1da177e4 LT |
448 | return (status); |
449 | } | |
450 | ||
44f6c012 | 451 | /******************************************************************************* |
1da177e4 LT |
452 | * |
453 | * FUNCTION: acpi_ds_init_buffer_field | |
454 | * | |
455 | * PARAMETERS: aml_opcode - create_xxx_field | |
456 | * obj_desc - buffer_field object | |
457 | * buffer_desc - Host Buffer | |
458 | * offset_desc - Offset into buffer | |
44f6c012 RM |
459 | * length_desc - Length of field (CREATE_FIELD_OP only) |
460 | * result_desc - Where to store the result | |
1da177e4 LT |
461 | * |
462 | * RETURN: Status | |
463 | * | |
464 | * DESCRIPTION: Perform actual initialization of a buffer field | |
465 | * | |
44f6c012 | 466 | ******************************************************************************/ |
1da177e4 | 467 | |
44f6c012 | 468 | static acpi_status |
4be44fcd LB |
469 | acpi_ds_init_buffer_field(u16 aml_opcode, |
470 | union acpi_operand_object *obj_desc, | |
471 | union acpi_operand_object *buffer_desc, | |
472 | union acpi_operand_object *offset_desc, | |
473 | union acpi_operand_object *length_desc, | |
474 | union acpi_operand_object *result_desc) | |
1da177e4 | 475 | { |
4be44fcd LB |
476 | u32 offset; |
477 | u32 bit_offset; | |
478 | u32 bit_count; | |
479 | u8 field_flags; | |
480 | acpi_status status; | |
1da177e4 | 481 | |
b229cf92 | 482 | ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc); |
1da177e4 LT |
483 | |
484 | /* Host object must be a Buffer */ | |
485 | ||
4be44fcd | 486 | if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) { |
b8e4d893 BM |
487 | ACPI_ERROR((AE_INFO, |
488 | "Target of Create Field is not a Buffer object - %s", | |
489 | acpi_ut_get_object_type_name(buffer_desc))); | |
1da177e4 LT |
490 | |
491 | status = AE_AML_OPERAND_TYPE; | |
492 | goto cleanup; | |
493 | } | |
494 | ||
495 | /* | |
496 | * The last parameter to all of these opcodes (result_desc) started | |
497 | * out as a name_string, and should therefore now be a NS node | |
498 | * after resolution in acpi_ex_resolve_operands(). | |
499 | */ | |
4be44fcd | 500 | if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { |
b8e4d893 BM |
501 | ACPI_ERROR((AE_INFO, |
502 | "(%s) destination not a NS Node [%s]", | |
503 | acpi_ps_get_opcode_name(aml_opcode), | |
504 | acpi_ut_get_descriptor_name(result_desc))); | |
1da177e4 LT |
505 | |
506 | status = AE_AML_OPERAND_TYPE; | |
507 | goto cleanup; | |
508 | } | |
509 | ||
510 | offset = (u32) offset_desc->integer.value; | |
511 | ||
512 | /* | |
513 | * Setup the Bit offsets and counts, according to the opcode | |
514 | */ | |
515 | switch (aml_opcode) { | |
516 | case AML_CREATE_FIELD_OP: | |
517 | ||
518 | /* Offset is in bits, count is in bits */ | |
519 | ||
44f6c012 | 520 | field_flags = AML_FIELD_ACCESS_BYTE; |
1da177e4 | 521 | bit_offset = offset; |
4be44fcd | 522 | bit_count = (u32) length_desc->integer.value; |
44f6c012 RM |
523 | |
524 | /* Must have a valid (>0) bit count */ | |
525 | ||
526 | if (bit_count == 0) { | |
b8e4d893 | 527 | ACPI_ERROR((AE_INFO, |
b229cf92 | 528 | "Attempt to CreateField of length zero")); |
44f6c012 RM |
529 | status = AE_AML_OPERAND_VALUE; |
530 | goto cleanup; | |
531 | } | |
1da177e4 LT |
532 | break; |
533 | ||
534 | case AML_CREATE_BIT_FIELD_OP: | |
535 | ||
536 | /* Offset is in bits, Field is one bit */ | |
537 | ||
538 | bit_offset = offset; | |
4be44fcd | 539 | bit_count = 1; |
1da177e4 LT |
540 | field_flags = AML_FIELD_ACCESS_BYTE; |
541 | break; | |
542 | ||
543 | case AML_CREATE_BYTE_FIELD_OP: | |
544 | ||
545 | /* Offset is in bytes, field is one byte */ | |
546 | ||
547 | bit_offset = 8 * offset; | |
4be44fcd | 548 | bit_count = 8; |
1da177e4 LT |
549 | field_flags = AML_FIELD_ACCESS_BYTE; |
550 | break; | |
551 | ||
552 | case AML_CREATE_WORD_FIELD_OP: | |
553 | ||
554 | /* Offset is in bytes, field is one word */ | |
555 | ||
556 | bit_offset = 8 * offset; | |
4be44fcd | 557 | bit_count = 16; |
1da177e4 LT |
558 | field_flags = AML_FIELD_ACCESS_WORD; |
559 | break; | |
560 | ||
561 | case AML_CREATE_DWORD_FIELD_OP: | |
562 | ||
563 | /* Offset is in bytes, field is one dword */ | |
564 | ||
565 | bit_offset = 8 * offset; | |
4be44fcd | 566 | bit_count = 32; |
1da177e4 LT |
567 | field_flags = AML_FIELD_ACCESS_DWORD; |
568 | break; | |
569 | ||
570 | case AML_CREATE_QWORD_FIELD_OP: | |
571 | ||
572 | /* Offset is in bytes, field is one qword */ | |
573 | ||
574 | bit_offset = 8 * offset; | |
4be44fcd | 575 | bit_count = 64; |
1da177e4 LT |
576 | field_flags = AML_FIELD_ACCESS_QWORD; |
577 | break; | |
578 | ||
579 | default: | |
580 | ||
b8e4d893 BM |
581 | ACPI_ERROR((AE_INFO, |
582 | "Unknown field creation opcode %02x", aml_opcode)); | |
1da177e4 LT |
583 | status = AE_AML_BAD_OPCODE; |
584 | goto cleanup; | |
585 | } | |
586 | ||
587 | /* Entire field must fit within the current length of the buffer */ | |
588 | ||
4be44fcd | 589 | if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) { |
b8e4d893 BM |
590 | ACPI_ERROR((AE_INFO, |
591 | "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)", | |
592 | acpi_ut_get_node_name(result_desc), | |
593 | bit_offset + bit_count, | |
594 | acpi_ut_get_node_name(buffer_desc->buffer.node), | |
595 | 8 * (u32) buffer_desc->buffer.length)); | |
1da177e4 LT |
596 | status = AE_AML_BUFFER_LIMIT; |
597 | goto cleanup; | |
598 | } | |
599 | ||
600 | /* | |
601 | * Initialize areas of the field object that are common to all fields | |
44f6c012 RM |
602 | * For field_flags, use LOCK_RULE = 0 (NO_LOCK), |
603 | * UPDATE_RULE = 0 (UPDATE_PRESERVE) | |
1da177e4 | 604 | */ |
4be44fcd LB |
605 | status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, |
606 | bit_offset, bit_count); | |
607 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
608 | goto cleanup; |
609 | } | |
610 | ||
611 | obj_desc->buffer_field.buffer_obj = buffer_desc; | |
612 | ||
613 | /* Reference count for buffer_desc inherits obj_desc count */ | |
614 | ||
44f6c012 | 615 | buffer_desc->common.reference_count = (u16) |
4be44fcd LB |
616 | (buffer_desc->common.reference_count + |
617 | obj_desc->common.reference_count); | |
1da177e4 | 618 | |
4be44fcd | 619 | cleanup: |
1da177e4 LT |
620 | |
621 | /* Always delete the operands */ | |
622 | ||
4be44fcd LB |
623 | acpi_ut_remove_reference(offset_desc); |
624 | acpi_ut_remove_reference(buffer_desc); | |
1da177e4 LT |
625 | |
626 | if (aml_opcode == AML_CREATE_FIELD_OP) { | |
4be44fcd | 627 | acpi_ut_remove_reference(length_desc); |
1da177e4 LT |
628 | } |
629 | ||
630 | /* On failure, delete the result descriptor */ | |
631 | ||
4be44fcd LB |
632 | if (ACPI_FAILURE(status)) { |
633 | acpi_ut_remove_reference(result_desc); /* Result descriptor */ | |
634 | } else { | |
1da177e4 LT |
635 | /* Now the address and length are valid for this buffer_field */ |
636 | ||
637 | obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; | |
638 | } | |
639 | ||
4be44fcd | 640 | return_ACPI_STATUS(status); |
1da177e4 LT |
641 | } |
642 | ||
44f6c012 | 643 | /******************************************************************************* |
1da177e4 LT |
644 | * |
645 | * FUNCTION: acpi_ds_eval_buffer_field_operands | |
646 | * | |
647 | * PARAMETERS: walk_state - Current walk | |
648 | * Op - A valid buffer_field Op object | |
649 | * | |
650 | * RETURN: Status | |
651 | * | |
652 | * DESCRIPTION: Get buffer_field Buffer and Index | |
653 | * Called from acpi_ds_exec_end_op during buffer_field parse tree walk | |
654 | * | |
44f6c012 | 655 | ******************************************************************************/ |
1da177e4 LT |
656 | |
657 | acpi_status | |
4be44fcd LB |
658 | acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, |
659 | union acpi_parse_object *op) | |
1da177e4 | 660 | { |
4be44fcd LB |
661 | acpi_status status; |
662 | union acpi_operand_object *obj_desc; | |
663 | struct acpi_namespace_node *node; | |
664 | union acpi_parse_object *next_op; | |
1da177e4 | 665 | |
b229cf92 | 666 | ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op); |
1da177e4 LT |
667 | |
668 | /* | |
669 | * This is where we evaluate the address and length fields of the | |
670 | * create_xxx_field declaration | |
671 | */ | |
4be44fcd | 672 | node = op->common.node; |
1da177e4 LT |
673 | |
674 | /* next_op points to the op that holds the Buffer */ | |
675 | ||
676 | next_op = op->common.value.arg; | |
677 | ||
678 | /* Evaluate/create the address and length operands */ | |
679 | ||
4be44fcd LB |
680 | status = acpi_ds_create_operands(walk_state, next_op); |
681 | if (ACPI_FAILURE(status)) { | |
682 | return_ACPI_STATUS(status); | |
1da177e4 LT |
683 | } |
684 | ||
4be44fcd | 685 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 686 | if (!obj_desc) { |
4be44fcd | 687 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
688 | } |
689 | ||
690 | /* Resolve the operands */ | |
691 | ||
4be44fcd LB |
692 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
693 | ACPI_WALK_OPERANDS, walk_state); | |
1da177e4 | 694 | |
4be44fcd LB |
695 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
696 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
697 | walk_state->num_operands, | |
b229cf92 | 698 | "after AcpiExResolveOperands"); |
1da177e4 | 699 | |
4be44fcd | 700 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
701 | ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)", |
702 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
703 | status)); | |
1da177e4 | 704 | |
4be44fcd | 705 | return_ACPI_STATUS(status); |
1da177e4 LT |
706 | } |
707 | ||
708 | /* Initialize the Buffer Field */ | |
709 | ||
710 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { | |
52fc0b02 | 711 | |
1da177e4 LT |
712 | /* NOTE: Slightly different operands for this opcode */ |
713 | ||
4be44fcd LB |
714 | status = |
715 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
716 | walk_state->operands[0], | |
717 | walk_state->operands[1], | |
718 | walk_state->operands[2], | |
719 | walk_state->operands[3]); | |
720 | } else { | |
1da177e4 LT |
721 | /* All other, create_xxx_field opcodes */ |
722 | ||
4be44fcd LB |
723 | status = |
724 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
725 | walk_state->operands[0], | |
726 | walk_state->operands[1], NULL, | |
727 | walk_state->operands[2]); | |
1da177e4 LT |
728 | } |
729 | ||
4be44fcd | 730 | return_ACPI_STATUS(status); |
1da177e4 LT |
731 | } |
732 | ||
44f6c012 | 733 | /******************************************************************************* |
1da177e4 LT |
734 | * |
735 | * FUNCTION: acpi_ds_eval_region_operands | |
736 | * | |
737 | * PARAMETERS: walk_state - Current walk | |
738 | * Op - A valid region Op object | |
739 | * | |
740 | * RETURN: Status | |
741 | * | |
742 | * DESCRIPTION: Get region address and length | |
743 | * Called from acpi_ds_exec_end_op during op_region parse tree walk | |
744 | * | |
44f6c012 | 745 | ******************************************************************************/ |
1da177e4 LT |
746 | |
747 | acpi_status | |
4be44fcd LB |
748 | acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, |
749 | union acpi_parse_object *op) | |
1da177e4 | 750 | { |
4be44fcd LB |
751 | acpi_status status; |
752 | union acpi_operand_object *obj_desc; | |
753 | union acpi_operand_object *operand_desc; | |
754 | struct acpi_namespace_node *node; | |
755 | union acpi_parse_object *next_op; | |
1da177e4 | 756 | |
b229cf92 | 757 | ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op); |
1da177e4 LT |
758 | |
759 | /* | |
44f6c012 RM |
760 | * This is where we evaluate the address and length fields of the |
761 | * op_region declaration | |
1da177e4 | 762 | */ |
4be44fcd | 763 | node = op->common.node; |
1da177e4 LT |
764 | |
765 | /* next_op points to the op that holds the space_iD */ | |
766 | ||
767 | next_op = op->common.value.arg; | |
768 | ||
769 | /* next_op points to address op */ | |
770 | ||
771 | next_op = next_op->common.next; | |
772 | ||
773 | /* Evaluate/create the address and length operands */ | |
774 | ||
4be44fcd LB |
775 | status = acpi_ds_create_operands(walk_state, next_op); |
776 | if (ACPI_FAILURE(status)) { | |
777 | return_ACPI_STATUS(status); | |
1da177e4 LT |
778 | } |
779 | ||
780 | /* Resolve the length and address operands to numbers */ | |
781 | ||
4be44fcd LB |
782 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
783 | ACPI_WALK_OPERANDS, walk_state); | |
784 | if (ACPI_FAILURE(status)) { | |
785 | return_ACPI_STATUS(status); | |
1da177e4 LT |
786 | } |
787 | ||
4be44fcd LB |
788 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
789 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
b229cf92 | 790 | 1, "after AcpiExResolveOperands"); |
1da177e4 | 791 | |
4be44fcd | 792 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 793 | if (!obj_desc) { |
4be44fcd | 794 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
795 | } |
796 | ||
797 | /* | |
798 | * Get the length operand and save it | |
799 | * (at Top of stack) | |
800 | */ | |
801 | operand_desc = walk_state->operands[walk_state->num_operands - 1]; | |
802 | ||
803 | obj_desc->region.length = (u32) operand_desc->integer.value; | |
4be44fcd | 804 | acpi_ut_remove_reference(operand_desc); |
1da177e4 LT |
805 | |
806 | /* | |
807 | * Get the address and save it | |
808 | * (at top of stack - 1) | |
809 | */ | |
810 | operand_desc = walk_state->operands[walk_state->num_operands - 2]; | |
811 | ||
44f6c012 | 812 | obj_desc->region.address = (acpi_physical_address) |
4be44fcd LB |
813 | operand_desc->integer.value; |
814 | acpi_ut_remove_reference(operand_desc); | |
1da177e4 | 815 | |
b229cf92 | 816 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", |
4be44fcd | 817 | obj_desc, |
b7f9f042 | 818 | ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address), |
4be44fcd | 819 | obj_desc->region.length)); |
1da177e4 LT |
820 | |
821 | /* Now the address and length are valid for this opregion */ | |
822 | ||
823 | obj_desc->region.flags |= AOPOBJ_DATA_VALID; | |
824 | ||
4be44fcd | 825 | return_ACPI_STATUS(status); |
1da177e4 LT |
826 | } |
827 | ||
941f48bb LM |
828 | /******************************************************************************* |
829 | * | |
830 | * FUNCTION: acpi_ds_eval_table_region_operands | |
831 | * | |
832 | * PARAMETERS: walk_state - Current walk | |
833 | * Op - A valid region Op object | |
834 | * | |
835 | * RETURN: Status | |
836 | * | |
837 | * DESCRIPTION: Get region address and length | |
838 | * Called from acpi_ds_exec_end_op during data_table_region parse tree walk | |
839 | * | |
840 | ******************************************************************************/ | |
841 | ||
842 | acpi_status | |
843 | acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state, | |
844 | union acpi_parse_object *op) | |
845 | { | |
846 | acpi_status status; | |
847 | union acpi_operand_object *obj_desc; | |
848 | union acpi_operand_object **operand; | |
849 | struct acpi_namespace_node *node; | |
850 | union acpi_parse_object *next_op; | |
67a119f9 | 851 | u32 table_index; |
941f48bb LM |
852 | struct acpi_table_header *table; |
853 | ||
854 | ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op); | |
855 | ||
856 | /* | |
857 | * This is where we evaluate the signature_string and oem_iDString | |
858 | * and oem_table_iDString of the data_table_region declaration | |
859 | */ | |
860 | node = op->common.node; | |
861 | ||
862 | /* next_op points to signature_string op */ | |
863 | ||
864 | next_op = op->common.value.arg; | |
865 | ||
866 | /* | |
867 | * Evaluate/create the signature_string and oem_iDString | |
868 | * and oem_table_iDString operands | |
869 | */ | |
870 | status = acpi_ds_create_operands(walk_state, next_op); | |
871 | if (ACPI_FAILURE(status)) { | |
872 | return_ACPI_STATUS(status); | |
873 | } | |
874 | ||
875 | /* | |
876 | * Resolve the signature_string and oem_iDString | |
877 | * and oem_table_iDString operands | |
878 | */ | |
879 | status = acpi_ex_resolve_operands(op->common.aml_opcode, | |
880 | ACPI_WALK_OPERANDS, walk_state); | |
881 | if (ACPI_FAILURE(status)) { | |
882 | return_ACPI_STATUS(status); | |
883 | } | |
884 | ||
885 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, | |
886 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
887 | 1, "after AcpiExResolveOperands"); | |
888 | ||
889 | operand = &walk_state->operands[0]; | |
890 | ||
891 | /* Find the ACPI table */ | |
892 | ||
893 | status = acpi_tb_find_table(operand[0]->string.pointer, | |
894 | operand[1]->string.pointer, | |
895 | operand[2]->string.pointer, &table_index); | |
896 | if (ACPI_FAILURE(status)) { | |
897 | return_ACPI_STATUS(status); | |
898 | } | |
899 | ||
900 | acpi_ut_remove_reference(operand[0]); | |
901 | acpi_ut_remove_reference(operand[1]); | |
902 | acpi_ut_remove_reference(operand[2]); | |
903 | ||
904 | status = acpi_get_table_by_index(table_index, &table); | |
905 | if (ACPI_FAILURE(status)) { | |
906 | return_ACPI_STATUS(status); | |
907 | } | |
908 | ||
909 | obj_desc = acpi_ns_get_attached_object(node); | |
910 | if (!obj_desc) { | |
911 | return_ACPI_STATUS(AE_NOT_EXIST); | |
912 | } | |
913 | ||
914 | obj_desc->region.address = | |
915 | (acpi_physical_address) ACPI_TO_INTEGER(table); | |
916 | obj_desc->region.length = table->length; | |
917 | ||
918 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", | |
919 | obj_desc, | |
920 | ACPI_FORMAT_NATIVE_UINT(obj_desc->region.address), | |
921 | obj_desc->region.length)); | |
922 | ||
923 | /* Now the address and length are valid for this opregion */ | |
924 | ||
925 | obj_desc->region.flags |= AOPOBJ_DATA_VALID; | |
926 | ||
927 | return_ACPI_STATUS(status); | |
928 | } | |
929 | ||
44f6c012 | 930 | /******************************************************************************* |
1da177e4 LT |
931 | * |
932 | * FUNCTION: acpi_ds_eval_data_object_operands | |
933 | * | |
934 | * PARAMETERS: walk_state - Current walk | |
935 | * Op - A valid data_object Op object | |
936 | * obj_desc - data_object | |
937 | * | |
938 | * RETURN: Status | |
939 | * | |
940 | * DESCRIPTION: Get the operands and complete the following data object types: | |
941 | * Buffer, Package. | |
942 | * | |
44f6c012 | 943 | ******************************************************************************/ |
1da177e4 LT |
944 | |
945 | acpi_status | |
4be44fcd LB |
946 | acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, |
947 | union acpi_parse_object *op, | |
948 | union acpi_operand_object *obj_desc) | |
1da177e4 | 949 | { |
4be44fcd LB |
950 | acpi_status status; |
951 | union acpi_operand_object *arg_desc; | |
952 | u32 length; | |
1da177e4 | 953 | |
b229cf92 | 954 | ACPI_FUNCTION_TRACE(ds_eval_data_object_operands); |
1da177e4 LT |
955 | |
956 | /* The first operand (for all of these data objects) is the length */ | |
957 | ||
773069d4 BM |
958 | /* |
959 | * Set proper index into operand stack for acpi_ds_obj_stack_push | |
960 | * invoked inside acpi_ds_create_operand. | |
961 | */ | |
962 | walk_state->operand_index = walk_state->num_operands; | |
963 | ||
4be44fcd LB |
964 | status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); |
965 | if (ACPI_FAILURE(status)) { | |
966 | return_ACPI_STATUS(status); | |
1da177e4 LT |
967 | } |
968 | ||
4be44fcd LB |
969 | status = acpi_ex_resolve_operands(walk_state->opcode, |
970 | &(walk_state-> | |
971 | operands[walk_state->num_operands - | |
972 | 1]), walk_state); | |
973 | if (ACPI_FAILURE(status)) { | |
974 | return_ACPI_STATUS(status); | |
1da177e4 LT |
975 | } |
976 | ||
977 | /* Extract length operand */ | |
978 | ||
4be44fcd | 979 | arg_desc = walk_state->operands[walk_state->num_operands - 1]; |
1da177e4 LT |
980 | length = (u32) arg_desc->integer.value; |
981 | ||
982 | /* Cleanup for length operand */ | |
983 | ||
4be44fcd LB |
984 | status = acpi_ds_obj_stack_pop(1, walk_state); |
985 | if (ACPI_FAILURE(status)) { | |
986 | return_ACPI_STATUS(status); | |
1da177e4 LT |
987 | } |
988 | ||
4be44fcd | 989 | acpi_ut_remove_reference(arg_desc); |
1da177e4 LT |
990 | |
991 | /* | |
992 | * Create the actual data object | |
993 | */ | |
994 | switch (op->common.aml_opcode) { | |
995 | case AML_BUFFER_OP: | |
996 | ||
4be44fcd LB |
997 | status = |
998 | acpi_ds_build_internal_buffer_obj(walk_state, op, length, | |
999 | &obj_desc); | |
1da177e4 LT |
1000 | break; |
1001 | ||
1002 | case AML_PACKAGE_OP: | |
1003 | case AML_VAR_PACKAGE_OP: | |
1004 | ||
4be44fcd LB |
1005 | status = |
1006 | acpi_ds_build_internal_package_obj(walk_state, op, length, | |
1007 | &obj_desc); | |
1da177e4 LT |
1008 | break; |
1009 | ||
1010 | default: | |
4be44fcd | 1011 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
1012 | } |
1013 | ||
4be44fcd | 1014 | if (ACPI_SUCCESS(status)) { |
1da177e4 | 1015 | /* |
44f6c012 | 1016 | * Return the object in the walk_state, unless the parent is a package - |
1da177e4 LT |
1017 | * in this case, the return object will be stored in the parse tree |
1018 | * for the package. | |
1019 | */ | |
1020 | if ((!op->common.parent) || | |
4be44fcd LB |
1021 | ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && |
1022 | (op->common.parent->common.aml_opcode != | |
1023 | AML_VAR_PACKAGE_OP) | |
fd350943 | 1024 | && (op->common.parent->common.aml_opcode != AML_NAME_OP))) { |
1da177e4 LT |
1025 | walk_state->result_obj = obj_desc; |
1026 | } | |
1027 | } | |
1028 | ||
4be44fcd | 1029 | return_ACPI_STATUS(status); |
1da177e4 LT |
1030 | } |
1031 | ||
ef805d95 LM |
1032 | /******************************************************************************* |
1033 | * | |
1034 | * FUNCTION: acpi_ds_eval_bank_field_operands | |
1035 | * | |
1036 | * PARAMETERS: walk_state - Current walk | |
1037 | * Op - A valid bank_field Op object | |
1038 | * | |
1039 | * RETURN: Status | |
1040 | * | |
1041 | * DESCRIPTION: Get bank_field bank_value | |
1042 | * Called from acpi_ds_exec_end_op during bank_field parse tree walk | |
1043 | * | |
1044 | ******************************************************************************/ | |
1045 | ||
1046 | acpi_status | |
1047 | acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state, | |
1048 | union acpi_parse_object *op) | |
1049 | { | |
1050 | acpi_status status; | |
1051 | union acpi_operand_object *obj_desc; | |
1052 | union acpi_operand_object *operand_desc; | |
1053 | struct acpi_namespace_node *node; | |
1054 | union acpi_parse_object *next_op; | |
1055 | union acpi_parse_object *arg; | |
1056 | ||
1057 | ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op); | |
1058 | ||
1059 | /* | |
1060 | * This is where we evaluate the bank_value field of the | |
1061 | * bank_field declaration | |
1062 | */ | |
1063 | ||
1064 | /* next_op points to the op that holds the Region */ | |
1065 | ||
1066 | next_op = op->common.value.arg; | |
1067 | ||
1068 | /* next_op points to the op that holds the Bank Register */ | |
1069 | ||
1070 | next_op = next_op->common.next; | |
1071 | ||
1072 | /* next_op points to the op that holds the Bank Value */ | |
1073 | ||
1074 | next_op = next_op->common.next; | |
1075 | ||
1076 | /* | |
1077 | * Set proper index into operand stack for acpi_ds_obj_stack_push | |
1078 | * invoked inside acpi_ds_create_operand. | |
1079 | * | |
1080 | * We use walk_state->Operands[0] to store the evaluated bank_value | |
1081 | */ | |
1082 | walk_state->operand_index = 0; | |
1083 | ||
1084 | status = acpi_ds_create_operand(walk_state, next_op, 0); | |
1085 | if (ACPI_FAILURE(status)) { | |
1086 | return_ACPI_STATUS(status); | |
1087 | } | |
1088 | ||
1089 | status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state); | |
1090 | if (ACPI_FAILURE(status)) { | |
1091 | return_ACPI_STATUS(status); | |
1092 | } | |
1093 | ||
1094 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, | |
1095 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
1096 | 1, "after AcpiExResolveOperands"); | |
1097 | ||
1098 | /* | |
1099 | * Get the bank_value operand and save it | |
1100 | * (at Top of stack) | |
1101 | */ | |
1102 | operand_desc = walk_state->operands[0]; | |
1103 | ||
1104 | /* Arg points to the start Bank Field */ | |
1105 | ||
1106 | arg = acpi_ps_get_arg(op, 4); | |
1107 | while (arg) { | |
1108 | ||
1109 | /* Ignore OFFSET and ACCESSAS terms here */ | |
1110 | ||
1111 | if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) { | |
1112 | node = arg->common.node; | |
1113 | ||
1114 | obj_desc = acpi_ns_get_attached_object(node); | |
1115 | if (!obj_desc) { | |
1116 | return_ACPI_STATUS(AE_NOT_EXIST); | |
1117 | } | |
1118 | ||
1119 | obj_desc->bank_field.value = | |
1120 | (u32) operand_desc->integer.value; | |
1121 | } | |
1122 | ||
1123 | /* Move to next field in the list */ | |
1124 | ||
1125 | arg = arg->common.next; | |
1126 | } | |
1127 | ||
1128 | acpi_ut_remove_reference(operand_desc); | |
1129 | return_ACPI_STATUS(status); | |
1130 | } | |
1131 | ||
1da177e4 LT |
1132 | /******************************************************************************* |
1133 | * | |
1134 | * FUNCTION: acpi_ds_exec_begin_control_op | |
1135 | * | |
1136 | * PARAMETERS: walk_list - The list that owns the walk stack | |
1137 | * Op - The control Op | |
1138 | * | |
1139 | * RETURN: Status | |
1140 | * | |
1141 | * DESCRIPTION: Handles all control ops encountered during control method | |
1142 | * execution. | |
1143 | * | |
1144 | ******************************************************************************/ | |
1145 | ||
1146 | acpi_status | |
4be44fcd LB |
1147 | acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, |
1148 | union acpi_parse_object *op) | |
1da177e4 | 1149 | { |
4be44fcd LB |
1150 | acpi_status status = AE_OK; |
1151 | union acpi_generic_state *control_state; | |
1da177e4 | 1152 | |
b229cf92 | 1153 | ACPI_FUNCTION_NAME(ds_exec_begin_control_op); |
1da177e4 | 1154 | |
4be44fcd LB |
1155 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op, |
1156 | op->common.aml_opcode, walk_state)); | |
1da177e4 LT |
1157 | |
1158 | switch (op->common.aml_opcode) { | |
1159 | case AML_IF_OP: | |
1160 | case AML_WHILE_OP: | |
1161 | ||
1162 | /* | |
1163 | * IF/WHILE: Create a new control state to manage these | |
1164 | * constructs. We need to manage these as a stack, in order | |
1165 | * to handle nesting. | |
1166 | */ | |
4be44fcd | 1167 | control_state = acpi_ut_create_control_state(); |
1da177e4 LT |
1168 | if (!control_state) { |
1169 | status = AE_NO_MEMORY; | |
1170 | break; | |
1171 | } | |
1172 | /* | |
1173 | * Save a pointer to the predicate for multiple executions | |
1174 | * of a loop | |
1175 | */ | |
4be44fcd LB |
1176 | control_state->control.aml_predicate_start = |
1177 | walk_state->parser_state.aml - 1; | |
1178 | control_state->control.package_end = | |
1179 | walk_state->parser_state.pkg_end; | |
1da177e4 LT |
1180 | control_state->control.opcode = op->common.aml_opcode; |
1181 | ||
1da177e4 LT |
1182 | /* Push the control state on this walk's control stack */ |
1183 | ||
4be44fcd LB |
1184 | acpi_ut_push_generic_state(&walk_state->control_state, |
1185 | control_state); | |
1da177e4 LT |
1186 | break; |
1187 | ||
1188 | case AML_ELSE_OP: | |
1189 | ||
1190 | /* Predicate is in the state object */ | |
1191 | /* If predicate is true, the IF was executed, ignore ELSE part */ | |
1192 | ||
1193 | if (walk_state->last_predicate) { | |
1194 | status = AE_CTRL_TRUE; | |
1195 | } | |
1196 | ||
1197 | break; | |
1198 | ||
1199 | case AML_RETURN_OP: | |
1200 | ||
1201 | break; | |
1202 | ||
1203 | default: | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | return (status); | |
1208 | } | |
1209 | ||
1da177e4 LT |
1210 | /******************************************************************************* |
1211 | * | |
1212 | * FUNCTION: acpi_ds_exec_end_control_op | |
1213 | * | |
1214 | * PARAMETERS: walk_list - The list that owns the walk stack | |
1215 | * Op - The control Op | |
1216 | * | |
1217 | * RETURN: Status | |
1218 | * | |
1219 | * DESCRIPTION: Handles all control ops encountered during control method | |
1220 | * execution. | |
1221 | * | |
1222 | ******************************************************************************/ | |
1223 | ||
1224 | acpi_status | |
4be44fcd LB |
1225 | acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, |
1226 | union acpi_parse_object * op) | |
1da177e4 | 1227 | { |
4be44fcd LB |
1228 | acpi_status status = AE_OK; |
1229 | union acpi_generic_state *control_state; | |
1da177e4 | 1230 | |
b229cf92 | 1231 | ACPI_FUNCTION_NAME(ds_exec_end_control_op); |
1da177e4 LT |
1232 | |
1233 | switch (op->common.aml_opcode) { | |
1234 | case AML_IF_OP: | |
1235 | ||
4be44fcd | 1236 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op)); |
1da177e4 LT |
1237 | |
1238 | /* | |
1239 | * Save the result of the predicate in case there is an | |
1240 | * ELSE to come | |
1241 | */ | |
1242 | walk_state->last_predicate = | |
4be44fcd | 1243 | (u8) walk_state->control_state->common.value; |
1da177e4 LT |
1244 | |
1245 | /* | |
1246 | * Pop the control state that was created at the start | |
1247 | * of the IF and free it | |
1248 | */ | |
4be44fcd LB |
1249 | control_state = |
1250 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1251 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1252 | break; |
1253 | ||
1da177e4 LT |
1254 | case AML_ELSE_OP: |
1255 | ||
1256 | break; | |
1257 | ||
1da177e4 LT |
1258 | case AML_WHILE_OP: |
1259 | ||
4be44fcd | 1260 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); |
1da177e4 LT |
1261 | |
1262 | if (walk_state->control_state->common.value) { | |
52fc0b02 | 1263 | |
1da177e4 LT |
1264 | /* Predicate was true, go back and evaluate it again! */ |
1265 | ||
1266 | status = AE_CTRL_PENDING; | |
1267 | } | |
1268 | ||
4be44fcd LB |
1269 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1270 | "[WHILE_OP] termination! Op=%p\n", op)); | |
1da177e4 LT |
1271 | |
1272 | /* Pop this control state and free it */ | |
1273 | ||
4be44fcd LB |
1274 | control_state = |
1275 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1da177e4 | 1276 | |
4be44fcd LB |
1277 | walk_state->aml_last_while = |
1278 | control_state->control.aml_predicate_start; | |
1279 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1280 | break; |
1281 | ||
1da177e4 LT |
1282 | case AML_RETURN_OP: |
1283 | ||
4be44fcd LB |
1284 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1285 | "[RETURN_OP] Op=%p Arg=%p\n", op, | |
1286 | op->common.value.arg)); | |
1da177e4 LT |
1287 | |
1288 | /* | |
1289 | * One optional operand -- the return value | |
1290 | * It can be either an immediate operand or a result that | |
1291 | * has been bubbled up the tree | |
1292 | */ | |
1293 | if (op->common.value.arg) { | |
52fc0b02 | 1294 | |
1da177e4 LT |
1295 | /* Since we have a real Return(), delete any implicit return */ |
1296 | ||
4be44fcd | 1297 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1298 | |
1299 | /* Return statement has an immediate operand */ | |
1300 | ||
4be44fcd LB |
1301 | status = |
1302 | acpi_ds_create_operands(walk_state, | |
1303 | op->common.value.arg); | |
1304 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1305 | return (status); |
1306 | } | |
1307 | ||
1308 | /* | |
1309 | * If value being returned is a Reference (such as | |
1310 | * an arg or local), resolve it now because it may | |
1311 | * cease to exist at the end of the method. | |
1312 | */ | |
4be44fcd LB |
1313 | status = |
1314 | acpi_ex_resolve_to_value(&walk_state->operands[0], | |
1315 | walk_state); | |
1316 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1317 | return (status); |
1318 | } | |
1319 | ||
1320 | /* | |
1321 | * Get the return value and save as the last result | |
1322 | * value. This is the only place where walk_state->return_desc | |
1323 | * is set to anything other than zero! | |
1324 | */ | |
1325 | walk_state->return_desc = walk_state->operands[0]; | |
773069d4 | 1326 | } else if (walk_state->result_count) { |
52fc0b02 | 1327 | |
1da177e4 LT |
1328 | /* Since we have a real Return(), delete any implicit return */ |
1329 | ||
4be44fcd | 1330 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1331 | |
1332 | /* | |
1333 | * The return value has come from a previous calculation. | |
1334 | * | |
1335 | * If value being returned is a Reference (such as | |
1336 | * an arg or local), resolve it now because it may | |
1337 | * cease to exist at the end of the method. | |
1338 | * | |
1339 | * Allow references created by the Index operator to return unchanged. | |
1340 | */ | |
4be44fcd LB |
1341 | if ((ACPI_GET_DESCRIPTOR_TYPE |
1342 | (walk_state->results->results.obj_desc[0]) == | |
1343 | ACPI_DESC_TYPE_OPERAND) | |
1344 | && | |
1345 | (ACPI_GET_OBJECT_TYPE | |
1346 | (walk_state->results->results.obj_desc[0]) == | |
1347 | ACPI_TYPE_LOCAL_REFERENCE) | |
1348 | && ((walk_state->results->results.obj_desc[0])-> | |
1349 | reference.opcode != AML_INDEX_OP)) { | |
1350 | status = | |
1351 | acpi_ex_resolve_to_value(&walk_state-> | |
1352 | results->results. | |
1353 | obj_desc[0], | |
1354 | walk_state); | |
1355 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1356 | return (status); |
1357 | } | |
1358 | } | |
1359 | ||
4be44fcd LB |
1360 | walk_state->return_desc = |
1361 | walk_state->results->results.obj_desc[0]; | |
1362 | } else { | |
1da177e4 LT |
1363 | /* No return operand */ |
1364 | ||
1365 | if (walk_state->num_operands) { | |
4be44fcd LB |
1366 | acpi_ut_remove_reference(walk_state-> |
1367 | operands[0]); | |
1da177e4 LT |
1368 | } |
1369 | ||
4be44fcd LB |
1370 | walk_state->operands[0] = NULL; |
1371 | walk_state->num_operands = 0; | |
1372 | walk_state->return_desc = NULL; | |
1da177e4 LT |
1373 | } |
1374 | ||
4be44fcd | 1375 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
b229cf92 | 1376 | "Completed RETURN_OP State=%p, RetVal=%p\n", |
4be44fcd | 1377 | walk_state, walk_state->return_desc)); |
1da177e4 LT |
1378 | |
1379 | /* End the control method execution right now */ | |
1380 | ||
1381 | status = AE_CTRL_TERMINATE; | |
1382 | break; | |
1383 | ||
1da177e4 LT |
1384 | case AML_NOOP_OP: |
1385 | ||
1386 | /* Just do nothing! */ | |
1387 | break; | |
1388 | ||
1da177e4 LT |
1389 | case AML_BREAK_POINT_OP: |
1390 | ||
1391 | /* Call up to the OS service layer to handle this */ | |
1392 | ||
4be44fcd LB |
1393 | status = |
1394 | acpi_os_signal(ACPI_SIGNAL_BREAKPOINT, | |
1395 | "Executed AML Breakpoint opcode"); | |
1da177e4 LT |
1396 | |
1397 | /* If and when it returns, all done. */ | |
1398 | ||
1399 | break; | |
1400 | ||
1da177e4 | 1401 | case AML_BREAK_OP: |
4be44fcd | 1402 | case AML_CONTINUE_OP: /* ACPI 2.0 */ |
1da177e4 LT |
1403 | |
1404 | /* Pop and delete control states until we find a while */ | |
1405 | ||
1406 | while (walk_state->control_state && | |
4be44fcd LB |
1407 | (walk_state->control_state->control.opcode != |
1408 | AML_WHILE_OP)) { | |
1409 | control_state = | |
1410 | acpi_ut_pop_generic_state(&walk_state-> | |
1411 | control_state); | |
1412 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1413 | } |
1414 | ||
1415 | /* No while found? */ | |
1416 | ||
1417 | if (!walk_state->control_state) { | |
1418 | return (AE_AML_NO_WHILE); | |
1419 | } | |
1420 | ||
1421 | /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */ | |
1422 | ||
4be44fcd LB |
1423 | walk_state->aml_last_while = |
1424 | walk_state->control_state->control.package_end; | |
1da177e4 LT |
1425 | |
1426 | /* Return status depending on opcode */ | |
1427 | ||
1428 | if (op->common.aml_opcode == AML_BREAK_OP) { | |
1429 | status = AE_CTRL_BREAK; | |
4be44fcd | 1430 | } else { |
1da177e4 LT |
1431 | status = AE_CTRL_CONTINUE; |
1432 | } | |
1433 | break; | |
1434 | ||
1da177e4 LT |
1435 | default: |
1436 | ||
b8e4d893 BM |
1437 | ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p", |
1438 | op->common.aml_opcode, op)); | |
1da177e4 LT |
1439 | |
1440 | status = AE_AML_BAD_OPCODE; | |
1441 | break; | |
1442 | } | |
1443 | ||
1444 | return (status); | |
1445 | } |