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 | /* | |
4a90c7e8 | 9 | * Copyright (C) 2000 - 2006, R. Byron Moore |
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> | |
52 | ||
53 | #define _COMPONENT ACPI_DISPATCHER | |
4be44fcd | 54 | ACPI_MODULE_NAME("dsopcode") |
1da177e4 | 55 | |
44f6c012 | 56 | /* Local prototypes */ |
44f6c012 | 57 | static acpi_status |
4be44fcd LB |
58 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, |
59 | struct acpi_namespace_node *scope_node, | |
60 | u32 aml_length, u8 * aml_start); | |
44f6c012 RM |
61 | |
62 | static acpi_status | |
4be44fcd LB |
63 | acpi_ds_init_buffer_field(u16 aml_opcode, |
64 | union acpi_operand_object *obj_desc, | |
65 | union acpi_operand_object *buffer_desc, | |
66 | union acpi_operand_object *offset_desc, | |
67 | union acpi_operand_object *length_desc, | |
68 | union acpi_operand_object *result_desc); | |
44f6c012 RM |
69 | |
70 | /******************************************************************************* | |
1da177e4 LT |
71 | * |
72 | * FUNCTION: acpi_ds_execute_arguments | |
73 | * | |
44f6c012 RM |
74 | * PARAMETERS: Node - Object NS node |
75 | * scope_node - Parent NS node | |
1da177e4 LT |
76 | * aml_length - Length of executable AML |
77 | * aml_start - Pointer to the AML | |
78 | * | |
79 | * RETURN: Status. | |
80 | * | |
81 | * DESCRIPTION: Late (deferred) execution of region or field arguments | |
82 | * | |
44f6c012 | 83 | ******************************************************************************/ |
1da177e4 | 84 | |
44f6c012 | 85 | static acpi_status |
4be44fcd LB |
86 | acpi_ds_execute_arguments(struct acpi_namespace_node *node, |
87 | struct acpi_namespace_node *scope_node, | |
88 | u32 aml_length, u8 * aml_start) | |
1da177e4 | 89 | { |
4be44fcd LB |
90 | acpi_status status; |
91 | union acpi_parse_object *op; | |
92 | struct acpi_walk_state *walk_state; | |
1da177e4 | 93 | |
4be44fcd | 94 | ACPI_FUNCTION_TRACE("ds_execute_arguments"); |
1da177e4 LT |
95 | |
96 | /* | |
97 | * Allocate a new parser op to be the root of the parsed tree | |
98 | */ | |
4be44fcd | 99 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); |
1da177e4 | 100 | if (!op) { |
4be44fcd | 101 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
102 | } |
103 | ||
104 | /* Save the Node for use in acpi_ps_parse_aml */ | |
105 | ||
106 | op->common.node = scope_node; | |
107 | ||
108 | /* Create and initialize a new parser state */ | |
109 | ||
4be44fcd | 110 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); |
1da177e4 | 111 | if (!walk_state) { |
88ac00f5 RM |
112 | status = AE_NO_MEMORY; |
113 | goto cleanup; | |
1da177e4 LT |
114 | } |
115 | ||
4be44fcd LB |
116 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
117 | aml_length, NULL, 1); | |
118 | if (ACPI_FAILURE(status)) { | |
119 | acpi_ds_delete_walk_state(walk_state); | |
88ac00f5 | 120 | goto cleanup; |
1da177e4 LT |
121 | } |
122 | ||
123 | /* Mark this parse as a deferred opcode */ | |
124 | ||
125 | walk_state->parse_flags = ACPI_PARSE_DEFERRED_OP; | |
126 | walk_state->deferred_node = node; | |
127 | ||
128 | /* Pass1: Parse the entire declaration */ | |
129 | ||
4be44fcd LB |
130 | status = acpi_ps_parse_aml(walk_state); |
131 | if (ACPI_FAILURE(status)) { | |
88ac00f5 | 132 | goto cleanup; |
1da177e4 LT |
133 | } |
134 | ||
135 | /* Get and init the Op created above */ | |
136 | ||
137 | op->common.node = node; | |
4be44fcd | 138 | acpi_ps_delete_parse_tree(op); |
1da177e4 LT |
139 | |
140 | /* Evaluate the deferred arguments */ | |
141 | ||
4be44fcd | 142 | op = acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP); |
1da177e4 | 143 | if (!op) { |
4be44fcd | 144 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
145 | } |
146 | ||
147 | op->common.node = scope_node; | |
148 | ||
149 | /* Create and initialize a new parser state */ | |
150 | ||
4be44fcd | 151 | walk_state = acpi_ds_create_walk_state(0, NULL, NULL, NULL); |
1da177e4 | 152 | if (!walk_state) { |
88ac00f5 RM |
153 | status = AE_NO_MEMORY; |
154 | goto cleanup; | |
1da177e4 LT |
155 | } |
156 | ||
157 | /* Execute the opcode and arguments */ | |
158 | ||
4be44fcd LB |
159 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
160 | aml_length, NULL, 3); | |
161 | if (ACPI_FAILURE(status)) { | |
162 | acpi_ds_delete_walk_state(walk_state); | |
88ac00f5 | 163 | goto cleanup; |
1da177e4 LT |
164 | } |
165 | ||
166 | /* Mark this execution as a deferred opcode */ | |
167 | ||
168 | walk_state->deferred_node = node; | |
4be44fcd | 169 | status = acpi_ps_parse_aml(walk_state); |
88ac00f5 | 170 | |
4be44fcd LB |
171 | cleanup: |
172 | acpi_ps_delete_parse_tree(op); | |
173 | return_ACPI_STATUS(status); | |
1da177e4 LT |
174 | } |
175 | ||
44f6c012 | 176 | /******************************************************************************* |
1da177e4 LT |
177 | * |
178 | * FUNCTION: acpi_ds_get_buffer_field_arguments | |
179 | * | |
180 | * PARAMETERS: obj_desc - A valid buffer_field object | |
181 | * | |
182 | * RETURN: Status. | |
183 | * | |
184 | * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late | |
185 | * evaluation of these field attributes. | |
186 | * | |
44f6c012 | 187 | ******************************************************************************/ |
1da177e4 LT |
188 | |
189 | acpi_status | |
4be44fcd | 190 | acpi_ds_get_buffer_field_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 191 | { |
4be44fcd LB |
192 | union acpi_operand_object *extra_desc; |
193 | struct acpi_namespace_node *node; | |
194 | acpi_status status; | |
1da177e4 | 195 | |
4be44fcd | 196 | ACPI_FUNCTION_TRACE_PTR("ds_get_buffer_field_arguments", obj_desc); |
1da177e4 LT |
197 | |
198 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 199 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
200 | } |
201 | ||
202 | /* Get the AML pointer (method object) and buffer_field node */ | |
203 | ||
4be44fcd | 204 | extra_desc = acpi_ns_get_secondary_object(obj_desc); |
1da177e4 LT |
205 | node = obj_desc->buffer_field.node; |
206 | ||
4be44fcd LB |
207 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
208 | (ACPI_TYPE_BUFFER_FIELD, node, NULL)); | |
209 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] buffer_field Arg Init\n", | |
210 | acpi_ut_get_node_name(node))); | |
1da177e4 LT |
211 | |
212 | /* Execute the AML code for the term_arg arguments */ | |
213 | ||
4be44fcd LB |
214 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), |
215 | extra_desc->extra.aml_length, | |
216 | extra_desc->extra.aml_start); | |
217 | return_ACPI_STATUS(status); | |
1da177e4 LT |
218 | } |
219 | ||
44f6c012 | 220 | /******************************************************************************* |
1da177e4 LT |
221 | * |
222 | * FUNCTION: acpi_ds_get_buffer_arguments | |
223 | * | |
224 | * PARAMETERS: obj_desc - A valid Buffer object | |
225 | * | |
226 | * RETURN: Status. | |
227 | * | |
228 | * DESCRIPTION: Get Buffer length and initializer byte list. This implements | |
229 | * the late evaluation of these attributes. | |
230 | * | |
44f6c012 | 231 | ******************************************************************************/ |
1da177e4 | 232 | |
4be44fcd | 233 | acpi_status acpi_ds_get_buffer_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 234 | { |
4be44fcd LB |
235 | struct acpi_namespace_node *node; |
236 | acpi_status status; | |
1da177e4 | 237 | |
4be44fcd | 238 | ACPI_FUNCTION_TRACE_PTR("ds_get_buffer_arguments", obj_desc); |
1da177e4 LT |
239 | |
240 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 241 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
242 | } |
243 | ||
244 | /* Get the Buffer node */ | |
245 | ||
246 | node = obj_desc->buffer.node; | |
247 | if (!node) { | |
b8e4d893 BM |
248 | ACPI_ERROR((AE_INFO, |
249 | "No pointer back to NS node in buffer obj %p", | |
250 | obj_desc)); | |
4be44fcd | 251 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
252 | } |
253 | ||
4be44fcd | 254 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Buffer Arg Init\n")); |
1da177e4 LT |
255 | |
256 | /* Execute the AML code for the term_arg arguments */ | |
257 | ||
4be44fcd LB |
258 | status = acpi_ds_execute_arguments(node, node, |
259 | obj_desc->buffer.aml_length, | |
260 | obj_desc->buffer.aml_start); | |
261 | return_ACPI_STATUS(status); | |
1da177e4 LT |
262 | } |
263 | ||
44f6c012 | 264 | /******************************************************************************* |
1da177e4 LT |
265 | * |
266 | * FUNCTION: acpi_ds_get_package_arguments | |
267 | * | |
268 | * PARAMETERS: obj_desc - A valid Package object | |
269 | * | |
270 | * RETURN: Status. | |
271 | * | |
272 | * DESCRIPTION: Get Package length and initializer byte list. This implements | |
273 | * the late evaluation of these attributes. | |
274 | * | |
44f6c012 | 275 | ******************************************************************************/ |
1da177e4 | 276 | |
4be44fcd | 277 | acpi_status acpi_ds_get_package_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 278 | { |
4be44fcd LB |
279 | struct acpi_namespace_node *node; |
280 | acpi_status status; | |
1da177e4 | 281 | |
4be44fcd | 282 | ACPI_FUNCTION_TRACE_PTR("ds_get_package_arguments", obj_desc); |
1da177e4 LT |
283 | |
284 | if (obj_desc->common.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 285 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
286 | } |
287 | ||
288 | /* Get the Package node */ | |
289 | ||
290 | node = obj_desc->package.node; | |
291 | if (!node) { | |
b8e4d893 BM |
292 | ACPI_ERROR((AE_INFO, |
293 | "No pointer back to NS node in package %p", | |
294 | obj_desc)); | |
4be44fcd | 295 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
296 | } |
297 | ||
4be44fcd | 298 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Package Arg Init\n")); |
1da177e4 LT |
299 | |
300 | /* Execute the AML code for the term_arg arguments */ | |
301 | ||
4be44fcd LB |
302 | status = acpi_ds_execute_arguments(node, node, |
303 | obj_desc->package.aml_length, | |
304 | obj_desc->package.aml_start); | |
305 | return_ACPI_STATUS(status); | |
1da177e4 LT |
306 | } |
307 | ||
1da177e4 LT |
308 | /***************************************************************************** |
309 | * | |
310 | * FUNCTION: acpi_ds_get_region_arguments | |
311 | * | |
312 | * PARAMETERS: obj_desc - A valid region object | |
313 | * | |
314 | * RETURN: Status. | |
315 | * | |
316 | * DESCRIPTION: Get region address and length. This implements the late | |
317 | * evaluation of these region attributes. | |
318 | * | |
319 | ****************************************************************************/ | |
320 | ||
4be44fcd | 321 | acpi_status acpi_ds_get_region_arguments(union acpi_operand_object *obj_desc) |
1da177e4 | 322 | { |
4be44fcd LB |
323 | struct acpi_namespace_node *node; |
324 | acpi_status status; | |
325 | union acpi_operand_object *extra_desc; | |
1da177e4 | 326 | |
4be44fcd | 327 | ACPI_FUNCTION_TRACE_PTR("ds_get_region_arguments", obj_desc); |
1da177e4 LT |
328 | |
329 | if (obj_desc->region.flags & AOPOBJ_DATA_VALID) { | |
4be44fcd | 330 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
331 | } |
332 | ||
4be44fcd | 333 | extra_desc = acpi_ns_get_secondary_object(obj_desc); |
1da177e4 | 334 | if (!extra_desc) { |
4be44fcd | 335 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
336 | } |
337 | ||
338 | /* Get the Region node */ | |
339 | ||
340 | node = obj_desc->region.node; | |
341 | ||
4be44fcd LB |
342 | ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname |
343 | (ACPI_TYPE_REGION, node, NULL)); | |
1da177e4 | 344 | |
4be44fcd LB |
345 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
346 | "[%4.4s] op_region Arg Init at AML %p\n", | |
347 | acpi_ut_get_node_name(node), | |
348 | extra_desc->extra.aml_start)); | |
1da177e4 LT |
349 | |
350 | /* Execute the argument AML */ | |
351 | ||
4be44fcd LB |
352 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), |
353 | extra_desc->extra.aml_length, | |
354 | extra_desc->extra.aml_start); | |
355 | return_ACPI_STATUS(status); | |
1da177e4 LT |
356 | } |
357 | ||
44f6c012 | 358 | /******************************************************************************* |
1da177e4 LT |
359 | * |
360 | * FUNCTION: acpi_ds_initialize_region | |
361 | * | |
44f6c012 | 362 | * PARAMETERS: obj_handle - Region namespace node |
1da177e4 LT |
363 | * |
364 | * RETURN: Status | |
365 | * | |
366 | * DESCRIPTION: Front end to ev_initialize_region | |
367 | * | |
44f6c012 | 368 | ******************************************************************************/ |
1da177e4 | 369 | |
4be44fcd | 370 | acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) |
1da177e4 | 371 | { |
4be44fcd LB |
372 | union acpi_operand_object *obj_desc; |
373 | acpi_status status; | |
1da177e4 | 374 | |
4be44fcd | 375 | obj_desc = acpi_ns_get_attached_object(obj_handle); |
1da177e4 LT |
376 | |
377 | /* Namespace is NOT locked */ | |
378 | ||
4be44fcd | 379 | status = acpi_ev_initialize_region(obj_desc, FALSE); |
1da177e4 LT |
380 | return (status); |
381 | } | |
382 | ||
44f6c012 | 383 | /******************************************************************************* |
1da177e4 LT |
384 | * |
385 | * FUNCTION: acpi_ds_init_buffer_field | |
386 | * | |
387 | * PARAMETERS: aml_opcode - create_xxx_field | |
388 | * obj_desc - buffer_field object | |
389 | * buffer_desc - Host Buffer | |
390 | * offset_desc - Offset into buffer | |
44f6c012 RM |
391 | * length_desc - Length of field (CREATE_FIELD_OP only) |
392 | * result_desc - Where to store the result | |
1da177e4 LT |
393 | * |
394 | * RETURN: Status | |
395 | * | |
396 | * DESCRIPTION: Perform actual initialization of a buffer field | |
397 | * | |
44f6c012 | 398 | ******************************************************************************/ |
1da177e4 | 399 | |
44f6c012 | 400 | static acpi_status |
4be44fcd LB |
401 | acpi_ds_init_buffer_field(u16 aml_opcode, |
402 | union acpi_operand_object *obj_desc, | |
403 | union acpi_operand_object *buffer_desc, | |
404 | union acpi_operand_object *offset_desc, | |
405 | union acpi_operand_object *length_desc, | |
406 | union acpi_operand_object *result_desc) | |
1da177e4 | 407 | { |
4be44fcd LB |
408 | u32 offset; |
409 | u32 bit_offset; | |
410 | u32 bit_count; | |
411 | u8 field_flags; | |
412 | acpi_status status; | |
1da177e4 | 413 | |
4be44fcd | 414 | ACPI_FUNCTION_TRACE_PTR("ds_init_buffer_field", obj_desc); |
1da177e4 LT |
415 | |
416 | /* Host object must be a Buffer */ | |
417 | ||
4be44fcd | 418 | if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) { |
b8e4d893 BM |
419 | ACPI_ERROR((AE_INFO, |
420 | "Target of Create Field is not a Buffer object - %s", | |
421 | acpi_ut_get_object_type_name(buffer_desc))); | |
1da177e4 LT |
422 | |
423 | status = AE_AML_OPERAND_TYPE; | |
424 | goto cleanup; | |
425 | } | |
426 | ||
427 | /* | |
428 | * The last parameter to all of these opcodes (result_desc) started | |
429 | * out as a name_string, and should therefore now be a NS node | |
430 | * after resolution in acpi_ex_resolve_operands(). | |
431 | */ | |
4be44fcd | 432 | if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { |
b8e4d893 BM |
433 | ACPI_ERROR((AE_INFO, |
434 | "(%s) destination not a NS Node [%s]", | |
435 | acpi_ps_get_opcode_name(aml_opcode), | |
436 | acpi_ut_get_descriptor_name(result_desc))); | |
1da177e4 LT |
437 | |
438 | status = AE_AML_OPERAND_TYPE; | |
439 | goto cleanup; | |
440 | } | |
441 | ||
442 | offset = (u32) offset_desc->integer.value; | |
443 | ||
444 | /* | |
445 | * Setup the Bit offsets and counts, according to the opcode | |
446 | */ | |
447 | switch (aml_opcode) { | |
448 | case AML_CREATE_FIELD_OP: | |
449 | ||
450 | /* Offset is in bits, count is in bits */ | |
451 | ||
44f6c012 | 452 | field_flags = AML_FIELD_ACCESS_BYTE; |
1da177e4 | 453 | bit_offset = offset; |
4be44fcd | 454 | bit_count = (u32) length_desc->integer.value; |
44f6c012 RM |
455 | |
456 | /* Must have a valid (>0) bit count */ | |
457 | ||
458 | if (bit_count == 0) { | |
b8e4d893 BM |
459 | ACPI_ERROR((AE_INFO, |
460 | "Attempt to create_field of length zero")); | |
44f6c012 RM |
461 | status = AE_AML_OPERAND_VALUE; |
462 | goto cleanup; | |
463 | } | |
1da177e4 LT |
464 | break; |
465 | ||
466 | case AML_CREATE_BIT_FIELD_OP: | |
467 | ||
468 | /* Offset is in bits, Field is one bit */ | |
469 | ||
470 | bit_offset = offset; | |
4be44fcd | 471 | bit_count = 1; |
1da177e4 LT |
472 | field_flags = AML_FIELD_ACCESS_BYTE; |
473 | break; | |
474 | ||
475 | case AML_CREATE_BYTE_FIELD_OP: | |
476 | ||
477 | /* Offset is in bytes, field is one byte */ | |
478 | ||
479 | bit_offset = 8 * offset; | |
4be44fcd | 480 | bit_count = 8; |
1da177e4 LT |
481 | field_flags = AML_FIELD_ACCESS_BYTE; |
482 | break; | |
483 | ||
484 | case AML_CREATE_WORD_FIELD_OP: | |
485 | ||
486 | /* Offset is in bytes, field is one word */ | |
487 | ||
488 | bit_offset = 8 * offset; | |
4be44fcd | 489 | bit_count = 16; |
1da177e4 LT |
490 | field_flags = AML_FIELD_ACCESS_WORD; |
491 | break; | |
492 | ||
493 | case AML_CREATE_DWORD_FIELD_OP: | |
494 | ||
495 | /* Offset is in bytes, field is one dword */ | |
496 | ||
497 | bit_offset = 8 * offset; | |
4be44fcd | 498 | bit_count = 32; |
1da177e4 LT |
499 | field_flags = AML_FIELD_ACCESS_DWORD; |
500 | break; | |
501 | ||
502 | case AML_CREATE_QWORD_FIELD_OP: | |
503 | ||
504 | /* Offset is in bytes, field is one qword */ | |
505 | ||
506 | bit_offset = 8 * offset; | |
4be44fcd | 507 | bit_count = 64; |
1da177e4 LT |
508 | field_flags = AML_FIELD_ACCESS_QWORD; |
509 | break; | |
510 | ||
511 | default: | |
512 | ||
b8e4d893 BM |
513 | ACPI_ERROR((AE_INFO, |
514 | "Unknown field creation opcode %02x", aml_opcode)); | |
1da177e4 LT |
515 | status = AE_AML_BAD_OPCODE; |
516 | goto cleanup; | |
517 | } | |
518 | ||
519 | /* Entire field must fit within the current length of the buffer */ | |
520 | ||
4be44fcd | 521 | if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) { |
b8e4d893 BM |
522 | ACPI_ERROR((AE_INFO, |
523 | "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)", | |
524 | acpi_ut_get_node_name(result_desc), | |
525 | bit_offset + bit_count, | |
526 | acpi_ut_get_node_name(buffer_desc->buffer.node), | |
527 | 8 * (u32) buffer_desc->buffer.length)); | |
1da177e4 LT |
528 | status = AE_AML_BUFFER_LIMIT; |
529 | goto cleanup; | |
530 | } | |
531 | ||
532 | /* | |
533 | * Initialize areas of the field object that are common to all fields | |
44f6c012 RM |
534 | * For field_flags, use LOCK_RULE = 0 (NO_LOCK), |
535 | * UPDATE_RULE = 0 (UPDATE_PRESERVE) | |
1da177e4 | 536 | */ |
4be44fcd LB |
537 | status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, |
538 | bit_offset, bit_count); | |
539 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
540 | goto cleanup; |
541 | } | |
542 | ||
543 | obj_desc->buffer_field.buffer_obj = buffer_desc; | |
544 | ||
545 | /* Reference count for buffer_desc inherits obj_desc count */ | |
546 | ||
44f6c012 | 547 | buffer_desc->common.reference_count = (u16) |
4be44fcd LB |
548 | (buffer_desc->common.reference_count + |
549 | obj_desc->common.reference_count); | |
1da177e4 | 550 | |
4be44fcd | 551 | cleanup: |
1da177e4 LT |
552 | |
553 | /* Always delete the operands */ | |
554 | ||
4be44fcd LB |
555 | acpi_ut_remove_reference(offset_desc); |
556 | acpi_ut_remove_reference(buffer_desc); | |
1da177e4 LT |
557 | |
558 | if (aml_opcode == AML_CREATE_FIELD_OP) { | |
4be44fcd | 559 | acpi_ut_remove_reference(length_desc); |
1da177e4 LT |
560 | } |
561 | ||
562 | /* On failure, delete the result descriptor */ | |
563 | ||
4be44fcd LB |
564 | if (ACPI_FAILURE(status)) { |
565 | acpi_ut_remove_reference(result_desc); /* Result descriptor */ | |
566 | } else { | |
1da177e4 LT |
567 | /* Now the address and length are valid for this buffer_field */ |
568 | ||
569 | obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; | |
570 | } | |
571 | ||
4be44fcd | 572 | return_ACPI_STATUS(status); |
1da177e4 LT |
573 | } |
574 | ||
44f6c012 | 575 | /******************************************************************************* |
1da177e4 LT |
576 | * |
577 | * FUNCTION: acpi_ds_eval_buffer_field_operands | |
578 | * | |
579 | * PARAMETERS: walk_state - Current walk | |
580 | * Op - A valid buffer_field Op object | |
581 | * | |
582 | * RETURN: Status | |
583 | * | |
584 | * DESCRIPTION: Get buffer_field Buffer and Index | |
585 | * Called from acpi_ds_exec_end_op during buffer_field parse tree walk | |
586 | * | |
44f6c012 | 587 | ******************************************************************************/ |
1da177e4 LT |
588 | |
589 | acpi_status | |
4be44fcd LB |
590 | acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, |
591 | union acpi_parse_object *op) | |
1da177e4 | 592 | { |
4be44fcd LB |
593 | acpi_status status; |
594 | union acpi_operand_object *obj_desc; | |
595 | struct acpi_namespace_node *node; | |
596 | union acpi_parse_object *next_op; | |
1da177e4 | 597 | |
4be44fcd | 598 | ACPI_FUNCTION_TRACE_PTR("ds_eval_buffer_field_operands", op); |
1da177e4 LT |
599 | |
600 | /* | |
601 | * This is where we evaluate the address and length fields of the | |
602 | * create_xxx_field declaration | |
603 | */ | |
4be44fcd | 604 | node = op->common.node; |
1da177e4 LT |
605 | |
606 | /* next_op points to the op that holds the Buffer */ | |
607 | ||
608 | next_op = op->common.value.arg; | |
609 | ||
610 | /* Evaluate/create the address and length operands */ | |
611 | ||
4be44fcd LB |
612 | status = acpi_ds_create_operands(walk_state, next_op); |
613 | if (ACPI_FAILURE(status)) { | |
614 | return_ACPI_STATUS(status); | |
1da177e4 LT |
615 | } |
616 | ||
4be44fcd | 617 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 618 | if (!obj_desc) { |
4be44fcd | 619 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
620 | } |
621 | ||
622 | /* Resolve the operands */ | |
623 | ||
4be44fcd LB |
624 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
625 | ACPI_WALK_OPERANDS, walk_state); | |
1da177e4 | 626 | |
4be44fcd LB |
627 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
628 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
629 | walk_state->num_operands, | |
630 | "after acpi_ex_resolve_operands"); | |
1da177e4 | 631 | |
4be44fcd | 632 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
633 | ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)", |
634 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
635 | status)); | |
1da177e4 | 636 | |
4be44fcd | 637 | return_ACPI_STATUS(status); |
1da177e4 LT |
638 | } |
639 | ||
640 | /* Initialize the Buffer Field */ | |
641 | ||
642 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { | |
52fc0b02 | 643 | |
1da177e4 LT |
644 | /* NOTE: Slightly different operands for this opcode */ |
645 | ||
4be44fcd LB |
646 | status = |
647 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
648 | walk_state->operands[0], | |
649 | walk_state->operands[1], | |
650 | walk_state->operands[2], | |
651 | walk_state->operands[3]); | |
652 | } else { | |
1da177e4 LT |
653 | /* All other, create_xxx_field opcodes */ |
654 | ||
4be44fcd LB |
655 | status = |
656 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
657 | walk_state->operands[0], | |
658 | walk_state->operands[1], NULL, | |
659 | walk_state->operands[2]); | |
1da177e4 LT |
660 | } |
661 | ||
4be44fcd | 662 | return_ACPI_STATUS(status); |
1da177e4 LT |
663 | } |
664 | ||
44f6c012 | 665 | /******************************************************************************* |
1da177e4 LT |
666 | * |
667 | * FUNCTION: acpi_ds_eval_region_operands | |
668 | * | |
669 | * PARAMETERS: walk_state - Current walk | |
670 | * Op - A valid region Op object | |
671 | * | |
672 | * RETURN: Status | |
673 | * | |
674 | * DESCRIPTION: Get region address and length | |
675 | * Called from acpi_ds_exec_end_op during op_region parse tree walk | |
676 | * | |
44f6c012 | 677 | ******************************************************************************/ |
1da177e4 LT |
678 | |
679 | acpi_status | |
4be44fcd LB |
680 | acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, |
681 | union acpi_parse_object *op) | |
1da177e4 | 682 | { |
4be44fcd LB |
683 | acpi_status status; |
684 | union acpi_operand_object *obj_desc; | |
685 | union acpi_operand_object *operand_desc; | |
686 | struct acpi_namespace_node *node; | |
687 | union acpi_parse_object *next_op; | |
1da177e4 | 688 | |
4be44fcd | 689 | ACPI_FUNCTION_TRACE_PTR("ds_eval_region_operands", op); |
1da177e4 LT |
690 | |
691 | /* | |
44f6c012 RM |
692 | * This is where we evaluate the address and length fields of the |
693 | * op_region declaration | |
1da177e4 | 694 | */ |
4be44fcd | 695 | node = op->common.node; |
1da177e4 LT |
696 | |
697 | /* next_op points to the op that holds the space_iD */ | |
698 | ||
699 | next_op = op->common.value.arg; | |
700 | ||
701 | /* next_op points to address op */ | |
702 | ||
703 | next_op = next_op->common.next; | |
704 | ||
705 | /* Evaluate/create the address and length operands */ | |
706 | ||
4be44fcd LB |
707 | status = acpi_ds_create_operands(walk_state, next_op); |
708 | if (ACPI_FAILURE(status)) { | |
709 | return_ACPI_STATUS(status); | |
1da177e4 LT |
710 | } |
711 | ||
712 | /* Resolve the length and address operands to numbers */ | |
713 | ||
4be44fcd LB |
714 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
715 | ACPI_WALK_OPERANDS, walk_state); | |
716 | if (ACPI_FAILURE(status)) { | |
717 | return_ACPI_STATUS(status); | |
1da177e4 LT |
718 | } |
719 | ||
4be44fcd LB |
720 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
721 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
722 | 1, "after acpi_ex_resolve_operands"); | |
1da177e4 | 723 | |
4be44fcd | 724 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 725 | if (!obj_desc) { |
4be44fcd | 726 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
727 | } |
728 | ||
729 | /* | |
730 | * Get the length operand and save it | |
731 | * (at Top of stack) | |
732 | */ | |
733 | operand_desc = walk_state->operands[walk_state->num_operands - 1]; | |
734 | ||
735 | obj_desc->region.length = (u32) operand_desc->integer.value; | |
4be44fcd | 736 | acpi_ut_remove_reference(operand_desc); |
1da177e4 LT |
737 | |
738 | /* | |
739 | * Get the address and save it | |
740 | * (at top of stack - 1) | |
741 | */ | |
742 | operand_desc = walk_state->operands[walk_state->num_operands - 2]; | |
743 | ||
44f6c012 | 744 | obj_desc->region.address = (acpi_physical_address) |
4be44fcd LB |
745 | operand_desc->integer.value; |
746 | acpi_ut_remove_reference(operand_desc); | |
1da177e4 | 747 | |
4be44fcd LB |
748 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "rgn_obj %p Addr %8.8X%8.8X Len %X\n", |
749 | obj_desc, | |
750 | ACPI_FORMAT_UINT64(obj_desc->region.address), | |
751 | obj_desc->region.length)); | |
1da177e4 LT |
752 | |
753 | /* Now the address and length are valid for this opregion */ | |
754 | ||
755 | obj_desc->region.flags |= AOPOBJ_DATA_VALID; | |
756 | ||
4be44fcd | 757 | return_ACPI_STATUS(status); |
1da177e4 LT |
758 | } |
759 | ||
44f6c012 | 760 | /******************************************************************************* |
1da177e4 LT |
761 | * |
762 | * FUNCTION: acpi_ds_eval_data_object_operands | |
763 | * | |
764 | * PARAMETERS: walk_state - Current walk | |
765 | * Op - A valid data_object Op object | |
766 | * obj_desc - data_object | |
767 | * | |
768 | * RETURN: Status | |
769 | * | |
770 | * DESCRIPTION: Get the operands and complete the following data object types: | |
771 | * Buffer, Package. | |
772 | * | |
44f6c012 | 773 | ******************************************************************************/ |
1da177e4 LT |
774 | |
775 | acpi_status | |
4be44fcd LB |
776 | acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, |
777 | union acpi_parse_object *op, | |
778 | union acpi_operand_object *obj_desc) | |
1da177e4 | 779 | { |
4be44fcd LB |
780 | acpi_status status; |
781 | union acpi_operand_object *arg_desc; | |
782 | u32 length; | |
1da177e4 | 783 | |
4be44fcd | 784 | ACPI_FUNCTION_TRACE("ds_eval_data_object_operands"); |
1da177e4 LT |
785 | |
786 | /* The first operand (for all of these data objects) is the length */ | |
787 | ||
4be44fcd LB |
788 | status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); |
789 | if (ACPI_FAILURE(status)) { | |
790 | return_ACPI_STATUS(status); | |
1da177e4 LT |
791 | } |
792 | ||
4be44fcd LB |
793 | status = acpi_ex_resolve_operands(walk_state->opcode, |
794 | &(walk_state-> | |
795 | operands[walk_state->num_operands - | |
796 | 1]), walk_state); | |
797 | if (ACPI_FAILURE(status)) { | |
798 | return_ACPI_STATUS(status); | |
1da177e4 LT |
799 | } |
800 | ||
801 | /* Extract length operand */ | |
802 | ||
4be44fcd | 803 | arg_desc = walk_state->operands[walk_state->num_operands - 1]; |
1da177e4 LT |
804 | length = (u32) arg_desc->integer.value; |
805 | ||
806 | /* Cleanup for length operand */ | |
807 | ||
4be44fcd LB |
808 | status = acpi_ds_obj_stack_pop(1, walk_state); |
809 | if (ACPI_FAILURE(status)) { | |
810 | return_ACPI_STATUS(status); | |
1da177e4 LT |
811 | } |
812 | ||
4be44fcd | 813 | acpi_ut_remove_reference(arg_desc); |
1da177e4 LT |
814 | |
815 | /* | |
816 | * Create the actual data object | |
817 | */ | |
818 | switch (op->common.aml_opcode) { | |
819 | case AML_BUFFER_OP: | |
820 | ||
4be44fcd LB |
821 | status = |
822 | acpi_ds_build_internal_buffer_obj(walk_state, op, length, | |
823 | &obj_desc); | |
1da177e4 LT |
824 | break; |
825 | ||
826 | case AML_PACKAGE_OP: | |
827 | case AML_VAR_PACKAGE_OP: | |
828 | ||
4be44fcd LB |
829 | status = |
830 | acpi_ds_build_internal_package_obj(walk_state, op, length, | |
831 | &obj_desc); | |
1da177e4 LT |
832 | break; |
833 | ||
834 | default: | |
4be44fcd | 835 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
836 | } |
837 | ||
4be44fcd | 838 | if (ACPI_SUCCESS(status)) { |
1da177e4 | 839 | /* |
44f6c012 | 840 | * Return the object in the walk_state, unless the parent is a package - |
1da177e4 LT |
841 | * in this case, the return object will be stored in the parse tree |
842 | * for the package. | |
843 | */ | |
844 | if ((!op->common.parent) || | |
4be44fcd LB |
845 | ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && |
846 | (op->common.parent->common.aml_opcode != | |
847 | AML_VAR_PACKAGE_OP) | |
848 | && (op->common.parent->common.aml_opcode != | |
849 | AML_NAME_OP))) { | |
1da177e4 LT |
850 | walk_state->result_obj = obj_desc; |
851 | } | |
852 | } | |
853 | ||
4be44fcd | 854 | return_ACPI_STATUS(status); |
1da177e4 LT |
855 | } |
856 | ||
1da177e4 LT |
857 | /******************************************************************************* |
858 | * | |
859 | * FUNCTION: acpi_ds_exec_begin_control_op | |
860 | * | |
861 | * PARAMETERS: walk_list - The list that owns the walk stack | |
862 | * Op - The control Op | |
863 | * | |
864 | * RETURN: Status | |
865 | * | |
866 | * DESCRIPTION: Handles all control ops encountered during control method | |
867 | * execution. | |
868 | * | |
869 | ******************************************************************************/ | |
870 | ||
871 | acpi_status | |
4be44fcd LB |
872 | acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, |
873 | union acpi_parse_object *op) | |
1da177e4 | 874 | { |
4be44fcd LB |
875 | acpi_status status = AE_OK; |
876 | union acpi_generic_state *control_state; | |
1da177e4 | 877 | |
4be44fcd | 878 | ACPI_FUNCTION_NAME("ds_exec_begin_control_op"); |
1da177e4 | 879 | |
4be44fcd LB |
880 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op, |
881 | op->common.aml_opcode, walk_state)); | |
1da177e4 LT |
882 | |
883 | switch (op->common.aml_opcode) { | |
884 | case AML_IF_OP: | |
885 | case AML_WHILE_OP: | |
886 | ||
887 | /* | |
888 | * IF/WHILE: Create a new control state to manage these | |
889 | * constructs. We need to manage these as a stack, in order | |
890 | * to handle nesting. | |
891 | */ | |
4be44fcd | 892 | control_state = acpi_ut_create_control_state(); |
1da177e4 LT |
893 | if (!control_state) { |
894 | status = AE_NO_MEMORY; | |
895 | break; | |
896 | } | |
897 | /* | |
898 | * Save a pointer to the predicate for multiple executions | |
899 | * of a loop | |
900 | */ | |
4be44fcd LB |
901 | control_state->control.aml_predicate_start = |
902 | walk_state->parser_state.aml - 1; | |
903 | control_state->control.package_end = | |
904 | walk_state->parser_state.pkg_end; | |
1da177e4 LT |
905 | control_state->control.opcode = op->common.aml_opcode; |
906 | ||
1da177e4 LT |
907 | /* Push the control state on this walk's control stack */ |
908 | ||
4be44fcd LB |
909 | acpi_ut_push_generic_state(&walk_state->control_state, |
910 | control_state); | |
1da177e4 LT |
911 | break; |
912 | ||
913 | case AML_ELSE_OP: | |
914 | ||
915 | /* Predicate is in the state object */ | |
916 | /* If predicate is true, the IF was executed, ignore ELSE part */ | |
917 | ||
918 | if (walk_state->last_predicate) { | |
919 | status = AE_CTRL_TRUE; | |
920 | } | |
921 | ||
922 | break; | |
923 | ||
924 | case AML_RETURN_OP: | |
925 | ||
926 | break; | |
927 | ||
928 | default: | |
929 | break; | |
930 | } | |
931 | ||
932 | return (status); | |
933 | } | |
934 | ||
1da177e4 LT |
935 | /******************************************************************************* |
936 | * | |
937 | * FUNCTION: acpi_ds_exec_end_control_op | |
938 | * | |
939 | * PARAMETERS: walk_list - The list that owns the walk stack | |
940 | * Op - The control Op | |
941 | * | |
942 | * RETURN: Status | |
943 | * | |
944 | * DESCRIPTION: Handles all control ops encountered during control method | |
945 | * execution. | |
946 | * | |
947 | ******************************************************************************/ | |
948 | ||
949 | acpi_status | |
4be44fcd LB |
950 | acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, |
951 | union acpi_parse_object * op) | |
1da177e4 | 952 | { |
4be44fcd LB |
953 | acpi_status status = AE_OK; |
954 | union acpi_generic_state *control_state; | |
1da177e4 | 955 | |
4be44fcd | 956 | ACPI_FUNCTION_NAME("ds_exec_end_control_op"); |
1da177e4 LT |
957 | |
958 | switch (op->common.aml_opcode) { | |
959 | case AML_IF_OP: | |
960 | ||
4be44fcd | 961 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op)); |
1da177e4 LT |
962 | |
963 | /* | |
964 | * Save the result of the predicate in case there is an | |
965 | * ELSE to come | |
966 | */ | |
967 | walk_state->last_predicate = | |
4be44fcd | 968 | (u8) walk_state->control_state->common.value; |
1da177e4 LT |
969 | |
970 | /* | |
971 | * Pop the control state that was created at the start | |
972 | * of the IF and free it | |
973 | */ | |
4be44fcd LB |
974 | control_state = |
975 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
976 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
977 | break; |
978 | ||
1da177e4 LT |
979 | case AML_ELSE_OP: |
980 | ||
981 | break; | |
982 | ||
1da177e4 LT |
983 | case AML_WHILE_OP: |
984 | ||
4be44fcd | 985 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); |
1da177e4 LT |
986 | |
987 | if (walk_state->control_state->common.value) { | |
52fc0b02 | 988 | |
1da177e4 LT |
989 | /* Predicate was true, go back and evaluate it again! */ |
990 | ||
991 | status = AE_CTRL_PENDING; | |
992 | } | |
993 | ||
4be44fcd LB |
994 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
995 | "[WHILE_OP] termination! Op=%p\n", op)); | |
1da177e4 LT |
996 | |
997 | /* Pop this control state and free it */ | |
998 | ||
4be44fcd LB |
999 | control_state = |
1000 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1da177e4 | 1001 | |
4be44fcd LB |
1002 | walk_state->aml_last_while = |
1003 | control_state->control.aml_predicate_start; | |
1004 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1005 | break; |
1006 | ||
1da177e4 LT |
1007 | case AML_RETURN_OP: |
1008 | ||
4be44fcd LB |
1009 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1010 | "[RETURN_OP] Op=%p Arg=%p\n", op, | |
1011 | op->common.value.arg)); | |
1da177e4 LT |
1012 | |
1013 | /* | |
1014 | * One optional operand -- the return value | |
1015 | * It can be either an immediate operand or a result that | |
1016 | * has been bubbled up the tree | |
1017 | */ | |
1018 | if (op->common.value.arg) { | |
52fc0b02 | 1019 | |
1da177e4 LT |
1020 | /* Since we have a real Return(), delete any implicit return */ |
1021 | ||
4be44fcd | 1022 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1023 | |
1024 | /* Return statement has an immediate operand */ | |
1025 | ||
4be44fcd LB |
1026 | status = |
1027 | acpi_ds_create_operands(walk_state, | |
1028 | op->common.value.arg); | |
1029 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1030 | return (status); |
1031 | } | |
1032 | ||
1033 | /* | |
1034 | * If value being returned is a Reference (such as | |
1035 | * an arg or local), resolve it now because it may | |
1036 | * cease to exist at the end of the method. | |
1037 | */ | |
4be44fcd LB |
1038 | status = |
1039 | acpi_ex_resolve_to_value(&walk_state->operands[0], | |
1040 | walk_state); | |
1041 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1042 | return (status); |
1043 | } | |
1044 | ||
1045 | /* | |
1046 | * Get the return value and save as the last result | |
1047 | * value. This is the only place where walk_state->return_desc | |
1048 | * is set to anything other than zero! | |
1049 | */ | |
1050 | walk_state->return_desc = walk_state->operands[0]; | |
4be44fcd LB |
1051 | } else if ((walk_state->results) && |
1052 | (walk_state->results->results.num_results > 0)) { | |
52fc0b02 | 1053 | |
1da177e4 LT |
1054 | /* Since we have a real Return(), delete any implicit return */ |
1055 | ||
4be44fcd | 1056 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1057 | |
1058 | /* | |
1059 | * The return value has come from a previous calculation. | |
1060 | * | |
1061 | * If value being returned is a Reference (such as | |
1062 | * an arg or local), resolve it now because it may | |
1063 | * cease to exist at the end of the method. | |
1064 | * | |
1065 | * Allow references created by the Index operator to return unchanged. | |
1066 | */ | |
4be44fcd LB |
1067 | if ((ACPI_GET_DESCRIPTOR_TYPE |
1068 | (walk_state->results->results.obj_desc[0]) == | |
1069 | ACPI_DESC_TYPE_OPERAND) | |
1070 | && | |
1071 | (ACPI_GET_OBJECT_TYPE | |
1072 | (walk_state->results->results.obj_desc[0]) == | |
1073 | ACPI_TYPE_LOCAL_REFERENCE) | |
1074 | && ((walk_state->results->results.obj_desc[0])-> | |
1075 | reference.opcode != AML_INDEX_OP)) { | |
1076 | status = | |
1077 | acpi_ex_resolve_to_value(&walk_state-> | |
1078 | results->results. | |
1079 | obj_desc[0], | |
1080 | walk_state); | |
1081 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1082 | return (status); |
1083 | } | |
1084 | } | |
1085 | ||
4be44fcd LB |
1086 | walk_state->return_desc = |
1087 | walk_state->results->results.obj_desc[0]; | |
1088 | } else { | |
1da177e4 LT |
1089 | /* No return operand */ |
1090 | ||
1091 | if (walk_state->num_operands) { | |
4be44fcd LB |
1092 | acpi_ut_remove_reference(walk_state-> |
1093 | operands[0]); | |
1da177e4 LT |
1094 | } |
1095 | ||
4be44fcd LB |
1096 | walk_state->operands[0] = NULL; |
1097 | walk_state->num_operands = 0; | |
1098 | walk_state->return_desc = NULL; | |
1da177e4 LT |
1099 | } |
1100 | ||
4be44fcd LB |
1101 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1102 | "Completed RETURN_OP State=%p, ret_val=%p\n", | |
1103 | walk_state, walk_state->return_desc)); | |
1da177e4 LT |
1104 | |
1105 | /* End the control method execution right now */ | |
1106 | ||
1107 | status = AE_CTRL_TERMINATE; | |
1108 | break; | |
1109 | ||
1da177e4 LT |
1110 | case AML_NOOP_OP: |
1111 | ||
1112 | /* Just do nothing! */ | |
1113 | break; | |
1114 | ||
1da177e4 LT |
1115 | case AML_BREAK_POINT_OP: |
1116 | ||
1117 | /* Call up to the OS service layer to handle this */ | |
1118 | ||
4be44fcd LB |
1119 | status = |
1120 | acpi_os_signal(ACPI_SIGNAL_BREAKPOINT, | |
1121 | "Executed AML Breakpoint opcode"); | |
1da177e4 LT |
1122 | |
1123 | /* If and when it returns, all done. */ | |
1124 | ||
1125 | break; | |
1126 | ||
1da177e4 | 1127 | case AML_BREAK_OP: |
4be44fcd | 1128 | case AML_CONTINUE_OP: /* ACPI 2.0 */ |
1da177e4 LT |
1129 | |
1130 | /* Pop and delete control states until we find a while */ | |
1131 | ||
1132 | while (walk_state->control_state && | |
4be44fcd LB |
1133 | (walk_state->control_state->control.opcode != |
1134 | AML_WHILE_OP)) { | |
1135 | control_state = | |
1136 | acpi_ut_pop_generic_state(&walk_state-> | |
1137 | control_state); | |
1138 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1139 | } |
1140 | ||
1141 | /* No while found? */ | |
1142 | ||
1143 | if (!walk_state->control_state) { | |
1144 | return (AE_AML_NO_WHILE); | |
1145 | } | |
1146 | ||
1147 | /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */ | |
1148 | ||
4be44fcd LB |
1149 | walk_state->aml_last_while = |
1150 | walk_state->control_state->control.package_end; | |
1da177e4 LT |
1151 | |
1152 | /* Return status depending on opcode */ | |
1153 | ||
1154 | if (op->common.aml_opcode == AML_BREAK_OP) { | |
1155 | status = AE_CTRL_BREAK; | |
4be44fcd | 1156 | } else { |
1da177e4 LT |
1157 | status = AE_CTRL_CONTINUE; |
1158 | } | |
1159 | break; | |
1160 | ||
1da177e4 LT |
1161 | default: |
1162 | ||
b8e4d893 BM |
1163 | ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p", |
1164 | op->common.aml_opcode, op)); | |
1da177e4 LT |
1165 | |
1166 | status = AE_AML_BAD_OPCODE; | |
1167 | break; | |
1168 | } | |
1169 | ||
1170 | return (status); | |
1171 | } |