]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsopcode - Dispatcher Op Region support and handling of | |
4 | * "control" opcodes | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
6c9deb72 | 9 | * Copyright (C) 2000 - 2007, 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 | |
b229cf92 | 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 | 116 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
ec3153fb | 117 | aml_length, NULL, ACPI_IMODE_LOAD_PASS1); |
4be44fcd LB |
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 | 159 | status = acpi_ds_init_aml_walk(walk_state, op, NULL, aml_start, |
ec3153fb | 160 | aml_length, NULL, ACPI_IMODE_EXECUTE); |
4be44fcd LB |
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 | |
b229cf92 | 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)); | |
b229cf92 | 209 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] BufferField Arg Init\n", |
4be44fcd | 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 | |
b229cf92 | 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 | |
b229cf92 | 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 | |
b229cf92 | 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 | |
b229cf92 | 345 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "[%4.4s] OpRegion Arg Init at AML %p\n", |
4be44fcd LB |
346 | acpi_ut_get_node_name(node), |
347 | extra_desc->extra.aml_start)); | |
1da177e4 LT |
348 | |
349 | /* Execute the argument AML */ | |
350 | ||
4be44fcd LB |
351 | status = acpi_ds_execute_arguments(node, acpi_ns_get_parent_node(node), |
352 | extra_desc->extra.aml_length, | |
353 | extra_desc->extra.aml_start); | |
b229cf92 BM |
354 | if (ACPI_FAILURE(status)) { |
355 | return_ACPI_STATUS(status); | |
356 | } | |
357 | ||
358 | /* Validate the region address/length via the host OS */ | |
359 | ||
360 | status = acpi_os_validate_address(obj_desc->region.space_id, | |
361 | obj_desc->region.address, | |
362 | (acpi_size) obj_desc->region.length); | |
363 | if (ACPI_FAILURE(status)) { | |
364 | /* | |
365 | * Invalid address/length. We will emit an error message and mark | |
366 | * the region as invalid, so that it will cause an additional error if | |
367 | * it is ever used. Then return AE_OK. | |
368 | */ | |
369 | ACPI_EXCEPTION((AE_INFO, status, | |
370 | "During address validation of OpRegion [%4.4s]", | |
371 | node->name.ascii)); | |
372 | obj_desc->common.flags |= AOPOBJ_INVALID; | |
373 | status = AE_OK; | |
374 | } | |
375 | ||
4be44fcd | 376 | return_ACPI_STATUS(status); |
1da177e4 LT |
377 | } |
378 | ||
44f6c012 | 379 | /******************************************************************************* |
1da177e4 LT |
380 | * |
381 | * FUNCTION: acpi_ds_initialize_region | |
382 | * | |
44f6c012 | 383 | * PARAMETERS: obj_handle - Region namespace node |
1da177e4 LT |
384 | * |
385 | * RETURN: Status | |
386 | * | |
387 | * DESCRIPTION: Front end to ev_initialize_region | |
388 | * | |
44f6c012 | 389 | ******************************************************************************/ |
1da177e4 | 390 | |
4be44fcd | 391 | acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) |
1da177e4 | 392 | { |
4be44fcd LB |
393 | union acpi_operand_object *obj_desc; |
394 | acpi_status status; | |
1da177e4 | 395 | |
4be44fcd | 396 | obj_desc = acpi_ns_get_attached_object(obj_handle); |
1da177e4 LT |
397 | |
398 | /* Namespace is NOT locked */ | |
399 | ||
4be44fcd | 400 | status = acpi_ev_initialize_region(obj_desc, FALSE); |
1da177e4 LT |
401 | return (status); |
402 | } | |
403 | ||
44f6c012 | 404 | /******************************************************************************* |
1da177e4 LT |
405 | * |
406 | * FUNCTION: acpi_ds_init_buffer_field | |
407 | * | |
408 | * PARAMETERS: aml_opcode - create_xxx_field | |
409 | * obj_desc - buffer_field object | |
410 | * buffer_desc - Host Buffer | |
411 | * offset_desc - Offset into buffer | |
44f6c012 RM |
412 | * length_desc - Length of field (CREATE_FIELD_OP only) |
413 | * result_desc - Where to store the result | |
1da177e4 LT |
414 | * |
415 | * RETURN: Status | |
416 | * | |
417 | * DESCRIPTION: Perform actual initialization of a buffer field | |
418 | * | |
44f6c012 | 419 | ******************************************************************************/ |
1da177e4 | 420 | |
44f6c012 | 421 | static acpi_status |
4be44fcd LB |
422 | acpi_ds_init_buffer_field(u16 aml_opcode, |
423 | union acpi_operand_object *obj_desc, | |
424 | union acpi_operand_object *buffer_desc, | |
425 | union acpi_operand_object *offset_desc, | |
426 | union acpi_operand_object *length_desc, | |
427 | union acpi_operand_object *result_desc) | |
1da177e4 | 428 | { |
4be44fcd LB |
429 | u32 offset; |
430 | u32 bit_offset; | |
431 | u32 bit_count; | |
432 | u8 field_flags; | |
433 | acpi_status status; | |
1da177e4 | 434 | |
b229cf92 | 435 | ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc); |
1da177e4 LT |
436 | |
437 | /* Host object must be a Buffer */ | |
438 | ||
4be44fcd | 439 | if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) { |
b8e4d893 BM |
440 | ACPI_ERROR((AE_INFO, |
441 | "Target of Create Field is not a Buffer object - %s", | |
442 | acpi_ut_get_object_type_name(buffer_desc))); | |
1da177e4 LT |
443 | |
444 | status = AE_AML_OPERAND_TYPE; | |
445 | goto cleanup; | |
446 | } | |
447 | ||
448 | /* | |
449 | * The last parameter to all of these opcodes (result_desc) started | |
450 | * out as a name_string, and should therefore now be a NS node | |
451 | * after resolution in acpi_ex_resolve_operands(). | |
452 | */ | |
4be44fcd | 453 | if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { |
b8e4d893 BM |
454 | ACPI_ERROR((AE_INFO, |
455 | "(%s) destination not a NS Node [%s]", | |
456 | acpi_ps_get_opcode_name(aml_opcode), | |
457 | acpi_ut_get_descriptor_name(result_desc))); | |
1da177e4 LT |
458 | |
459 | status = AE_AML_OPERAND_TYPE; | |
460 | goto cleanup; | |
461 | } | |
462 | ||
463 | offset = (u32) offset_desc->integer.value; | |
464 | ||
465 | /* | |
466 | * Setup the Bit offsets and counts, according to the opcode | |
467 | */ | |
468 | switch (aml_opcode) { | |
469 | case AML_CREATE_FIELD_OP: | |
470 | ||
471 | /* Offset is in bits, count is in bits */ | |
472 | ||
44f6c012 | 473 | field_flags = AML_FIELD_ACCESS_BYTE; |
1da177e4 | 474 | bit_offset = offset; |
4be44fcd | 475 | bit_count = (u32) length_desc->integer.value; |
44f6c012 RM |
476 | |
477 | /* Must have a valid (>0) bit count */ | |
478 | ||
479 | if (bit_count == 0) { | |
b8e4d893 | 480 | ACPI_ERROR((AE_INFO, |
b229cf92 | 481 | "Attempt to CreateField of length zero")); |
44f6c012 RM |
482 | status = AE_AML_OPERAND_VALUE; |
483 | goto cleanup; | |
484 | } | |
1da177e4 LT |
485 | break; |
486 | ||
487 | case AML_CREATE_BIT_FIELD_OP: | |
488 | ||
489 | /* Offset is in bits, Field is one bit */ | |
490 | ||
491 | bit_offset = offset; | |
4be44fcd | 492 | bit_count = 1; |
1da177e4 LT |
493 | field_flags = AML_FIELD_ACCESS_BYTE; |
494 | break; | |
495 | ||
496 | case AML_CREATE_BYTE_FIELD_OP: | |
497 | ||
498 | /* Offset is in bytes, field is one byte */ | |
499 | ||
500 | bit_offset = 8 * offset; | |
4be44fcd | 501 | bit_count = 8; |
1da177e4 LT |
502 | field_flags = AML_FIELD_ACCESS_BYTE; |
503 | break; | |
504 | ||
505 | case AML_CREATE_WORD_FIELD_OP: | |
506 | ||
507 | /* Offset is in bytes, field is one word */ | |
508 | ||
509 | bit_offset = 8 * offset; | |
4be44fcd | 510 | bit_count = 16; |
1da177e4 LT |
511 | field_flags = AML_FIELD_ACCESS_WORD; |
512 | break; | |
513 | ||
514 | case AML_CREATE_DWORD_FIELD_OP: | |
515 | ||
516 | /* Offset is in bytes, field is one dword */ | |
517 | ||
518 | bit_offset = 8 * offset; | |
4be44fcd | 519 | bit_count = 32; |
1da177e4 LT |
520 | field_flags = AML_FIELD_ACCESS_DWORD; |
521 | break; | |
522 | ||
523 | case AML_CREATE_QWORD_FIELD_OP: | |
524 | ||
525 | /* Offset is in bytes, field is one qword */ | |
526 | ||
527 | bit_offset = 8 * offset; | |
4be44fcd | 528 | bit_count = 64; |
1da177e4 LT |
529 | field_flags = AML_FIELD_ACCESS_QWORD; |
530 | break; | |
531 | ||
532 | default: | |
533 | ||
b8e4d893 BM |
534 | ACPI_ERROR((AE_INFO, |
535 | "Unknown field creation opcode %02x", aml_opcode)); | |
1da177e4 LT |
536 | status = AE_AML_BAD_OPCODE; |
537 | goto cleanup; | |
538 | } | |
539 | ||
540 | /* Entire field must fit within the current length of the buffer */ | |
541 | ||
4be44fcd | 542 | if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) { |
b8e4d893 BM |
543 | ACPI_ERROR((AE_INFO, |
544 | "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)", | |
545 | acpi_ut_get_node_name(result_desc), | |
546 | bit_offset + bit_count, | |
547 | acpi_ut_get_node_name(buffer_desc->buffer.node), | |
548 | 8 * (u32) buffer_desc->buffer.length)); | |
1da177e4 LT |
549 | status = AE_AML_BUFFER_LIMIT; |
550 | goto cleanup; | |
551 | } | |
552 | ||
553 | /* | |
554 | * Initialize areas of the field object that are common to all fields | |
44f6c012 RM |
555 | * For field_flags, use LOCK_RULE = 0 (NO_LOCK), |
556 | * UPDATE_RULE = 0 (UPDATE_PRESERVE) | |
1da177e4 | 557 | */ |
4be44fcd LB |
558 | status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, |
559 | bit_offset, bit_count); | |
560 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
561 | goto cleanup; |
562 | } | |
563 | ||
564 | obj_desc->buffer_field.buffer_obj = buffer_desc; | |
565 | ||
566 | /* Reference count for buffer_desc inherits obj_desc count */ | |
567 | ||
44f6c012 | 568 | buffer_desc->common.reference_count = (u16) |
4be44fcd LB |
569 | (buffer_desc->common.reference_count + |
570 | obj_desc->common.reference_count); | |
1da177e4 | 571 | |
4be44fcd | 572 | cleanup: |
1da177e4 LT |
573 | |
574 | /* Always delete the operands */ | |
575 | ||
4be44fcd LB |
576 | acpi_ut_remove_reference(offset_desc); |
577 | acpi_ut_remove_reference(buffer_desc); | |
1da177e4 LT |
578 | |
579 | if (aml_opcode == AML_CREATE_FIELD_OP) { | |
4be44fcd | 580 | acpi_ut_remove_reference(length_desc); |
1da177e4 LT |
581 | } |
582 | ||
583 | /* On failure, delete the result descriptor */ | |
584 | ||
4be44fcd LB |
585 | if (ACPI_FAILURE(status)) { |
586 | acpi_ut_remove_reference(result_desc); /* Result descriptor */ | |
587 | } else { | |
1da177e4 LT |
588 | /* Now the address and length are valid for this buffer_field */ |
589 | ||
590 | obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; | |
591 | } | |
592 | ||
4be44fcd | 593 | return_ACPI_STATUS(status); |
1da177e4 LT |
594 | } |
595 | ||
44f6c012 | 596 | /******************************************************************************* |
1da177e4 LT |
597 | * |
598 | * FUNCTION: acpi_ds_eval_buffer_field_operands | |
599 | * | |
600 | * PARAMETERS: walk_state - Current walk | |
601 | * Op - A valid buffer_field Op object | |
602 | * | |
603 | * RETURN: Status | |
604 | * | |
605 | * DESCRIPTION: Get buffer_field Buffer and Index | |
606 | * Called from acpi_ds_exec_end_op during buffer_field parse tree walk | |
607 | * | |
44f6c012 | 608 | ******************************************************************************/ |
1da177e4 LT |
609 | |
610 | acpi_status | |
4be44fcd LB |
611 | acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, |
612 | union acpi_parse_object *op) | |
1da177e4 | 613 | { |
4be44fcd LB |
614 | acpi_status status; |
615 | union acpi_operand_object *obj_desc; | |
616 | struct acpi_namespace_node *node; | |
617 | union acpi_parse_object *next_op; | |
1da177e4 | 618 | |
b229cf92 | 619 | ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op); |
1da177e4 LT |
620 | |
621 | /* | |
622 | * This is where we evaluate the address and length fields of the | |
623 | * create_xxx_field declaration | |
624 | */ | |
4be44fcd | 625 | node = op->common.node; |
1da177e4 LT |
626 | |
627 | /* next_op points to the op that holds the Buffer */ | |
628 | ||
629 | next_op = op->common.value.arg; | |
630 | ||
631 | /* Evaluate/create the address and length operands */ | |
632 | ||
4be44fcd LB |
633 | status = acpi_ds_create_operands(walk_state, next_op); |
634 | if (ACPI_FAILURE(status)) { | |
635 | return_ACPI_STATUS(status); | |
1da177e4 LT |
636 | } |
637 | ||
4be44fcd | 638 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 639 | if (!obj_desc) { |
4be44fcd | 640 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
641 | } |
642 | ||
643 | /* Resolve the operands */ | |
644 | ||
4be44fcd LB |
645 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
646 | ACPI_WALK_OPERANDS, walk_state); | |
1da177e4 | 647 | |
4be44fcd LB |
648 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
649 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
650 | walk_state->num_operands, | |
b229cf92 | 651 | "after AcpiExResolveOperands"); |
1da177e4 | 652 | |
4be44fcd | 653 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
654 | ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)", |
655 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
656 | status)); | |
1da177e4 | 657 | |
4be44fcd | 658 | return_ACPI_STATUS(status); |
1da177e4 LT |
659 | } |
660 | ||
661 | /* Initialize the Buffer Field */ | |
662 | ||
663 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { | |
52fc0b02 | 664 | |
1da177e4 LT |
665 | /* NOTE: Slightly different operands for this opcode */ |
666 | ||
4be44fcd LB |
667 | status = |
668 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
669 | walk_state->operands[0], | |
670 | walk_state->operands[1], | |
671 | walk_state->operands[2], | |
672 | walk_state->operands[3]); | |
673 | } else { | |
1da177e4 LT |
674 | /* All other, create_xxx_field opcodes */ |
675 | ||
4be44fcd LB |
676 | status = |
677 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
678 | walk_state->operands[0], | |
679 | walk_state->operands[1], NULL, | |
680 | walk_state->operands[2]); | |
1da177e4 LT |
681 | } |
682 | ||
4be44fcd | 683 | return_ACPI_STATUS(status); |
1da177e4 LT |
684 | } |
685 | ||
44f6c012 | 686 | /******************************************************************************* |
1da177e4 LT |
687 | * |
688 | * FUNCTION: acpi_ds_eval_region_operands | |
689 | * | |
690 | * PARAMETERS: walk_state - Current walk | |
691 | * Op - A valid region Op object | |
692 | * | |
693 | * RETURN: Status | |
694 | * | |
695 | * DESCRIPTION: Get region address and length | |
696 | * Called from acpi_ds_exec_end_op during op_region parse tree walk | |
697 | * | |
44f6c012 | 698 | ******************************************************************************/ |
1da177e4 LT |
699 | |
700 | acpi_status | |
4be44fcd LB |
701 | acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, |
702 | union acpi_parse_object *op) | |
1da177e4 | 703 | { |
4be44fcd LB |
704 | acpi_status status; |
705 | union acpi_operand_object *obj_desc; | |
706 | union acpi_operand_object *operand_desc; | |
707 | struct acpi_namespace_node *node; | |
708 | union acpi_parse_object *next_op; | |
1da177e4 | 709 | |
b229cf92 | 710 | ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op); |
1da177e4 LT |
711 | |
712 | /* | |
44f6c012 RM |
713 | * This is where we evaluate the address and length fields of the |
714 | * op_region declaration | |
1da177e4 | 715 | */ |
4be44fcd | 716 | node = op->common.node; |
1da177e4 LT |
717 | |
718 | /* next_op points to the op that holds the space_iD */ | |
719 | ||
720 | next_op = op->common.value.arg; | |
721 | ||
722 | /* next_op points to address op */ | |
723 | ||
724 | next_op = next_op->common.next; | |
725 | ||
726 | /* Evaluate/create the address and length operands */ | |
727 | ||
4be44fcd LB |
728 | status = acpi_ds_create_operands(walk_state, next_op); |
729 | if (ACPI_FAILURE(status)) { | |
730 | return_ACPI_STATUS(status); | |
1da177e4 LT |
731 | } |
732 | ||
733 | /* Resolve the length and address operands to numbers */ | |
734 | ||
4be44fcd LB |
735 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
736 | ACPI_WALK_OPERANDS, walk_state); | |
737 | if (ACPI_FAILURE(status)) { | |
738 | return_ACPI_STATUS(status); | |
1da177e4 LT |
739 | } |
740 | ||
4be44fcd LB |
741 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
742 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
b229cf92 | 743 | 1, "after AcpiExResolveOperands"); |
1da177e4 | 744 | |
4be44fcd | 745 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 746 | if (!obj_desc) { |
4be44fcd | 747 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
748 | } |
749 | ||
750 | /* | |
751 | * Get the length operand and save it | |
752 | * (at Top of stack) | |
753 | */ | |
754 | operand_desc = walk_state->operands[walk_state->num_operands - 1]; | |
755 | ||
756 | obj_desc->region.length = (u32) operand_desc->integer.value; | |
4be44fcd | 757 | acpi_ut_remove_reference(operand_desc); |
1da177e4 LT |
758 | |
759 | /* | |
760 | * Get the address and save it | |
761 | * (at top of stack - 1) | |
762 | */ | |
763 | operand_desc = walk_state->operands[walk_state->num_operands - 2]; | |
764 | ||
44f6c012 | 765 | obj_desc->region.address = (acpi_physical_address) |
4be44fcd LB |
766 | operand_desc->integer.value; |
767 | acpi_ut_remove_reference(operand_desc); | |
1da177e4 | 768 | |
b229cf92 | 769 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", |
4be44fcd LB |
770 | obj_desc, |
771 | ACPI_FORMAT_UINT64(obj_desc->region.address), | |
772 | obj_desc->region.length)); | |
1da177e4 LT |
773 | |
774 | /* Now the address and length are valid for this opregion */ | |
775 | ||
776 | obj_desc->region.flags |= AOPOBJ_DATA_VALID; | |
777 | ||
4be44fcd | 778 | return_ACPI_STATUS(status); |
1da177e4 LT |
779 | } |
780 | ||
44f6c012 | 781 | /******************************************************************************* |
1da177e4 LT |
782 | * |
783 | * FUNCTION: acpi_ds_eval_data_object_operands | |
784 | * | |
785 | * PARAMETERS: walk_state - Current walk | |
786 | * Op - A valid data_object Op object | |
787 | * obj_desc - data_object | |
788 | * | |
789 | * RETURN: Status | |
790 | * | |
791 | * DESCRIPTION: Get the operands and complete the following data object types: | |
792 | * Buffer, Package. | |
793 | * | |
44f6c012 | 794 | ******************************************************************************/ |
1da177e4 LT |
795 | |
796 | acpi_status | |
4be44fcd LB |
797 | acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, |
798 | union acpi_parse_object *op, | |
799 | union acpi_operand_object *obj_desc) | |
1da177e4 | 800 | { |
4be44fcd LB |
801 | acpi_status status; |
802 | union acpi_operand_object *arg_desc; | |
803 | u32 length; | |
1da177e4 | 804 | |
b229cf92 | 805 | ACPI_FUNCTION_TRACE(ds_eval_data_object_operands); |
1da177e4 LT |
806 | |
807 | /* The first operand (for all of these data objects) is the length */ | |
808 | ||
4be44fcd LB |
809 | status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); |
810 | if (ACPI_FAILURE(status)) { | |
811 | return_ACPI_STATUS(status); | |
1da177e4 LT |
812 | } |
813 | ||
4be44fcd LB |
814 | status = acpi_ex_resolve_operands(walk_state->opcode, |
815 | &(walk_state-> | |
816 | operands[walk_state->num_operands - | |
817 | 1]), walk_state); | |
818 | if (ACPI_FAILURE(status)) { | |
819 | return_ACPI_STATUS(status); | |
1da177e4 LT |
820 | } |
821 | ||
822 | /* Extract length operand */ | |
823 | ||
4be44fcd | 824 | arg_desc = walk_state->operands[walk_state->num_operands - 1]; |
1da177e4 LT |
825 | length = (u32) arg_desc->integer.value; |
826 | ||
827 | /* Cleanup for length operand */ | |
828 | ||
4be44fcd LB |
829 | status = acpi_ds_obj_stack_pop(1, walk_state); |
830 | if (ACPI_FAILURE(status)) { | |
831 | return_ACPI_STATUS(status); | |
1da177e4 LT |
832 | } |
833 | ||
4be44fcd | 834 | acpi_ut_remove_reference(arg_desc); |
1da177e4 LT |
835 | |
836 | /* | |
837 | * Create the actual data object | |
838 | */ | |
839 | switch (op->common.aml_opcode) { | |
840 | case AML_BUFFER_OP: | |
841 | ||
4be44fcd LB |
842 | status = |
843 | acpi_ds_build_internal_buffer_obj(walk_state, op, length, | |
844 | &obj_desc); | |
1da177e4 LT |
845 | break; |
846 | ||
847 | case AML_PACKAGE_OP: | |
848 | case AML_VAR_PACKAGE_OP: | |
849 | ||
4be44fcd LB |
850 | status = |
851 | acpi_ds_build_internal_package_obj(walk_state, op, length, | |
852 | &obj_desc); | |
1da177e4 LT |
853 | break; |
854 | ||
855 | default: | |
4be44fcd | 856 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
857 | } |
858 | ||
4be44fcd | 859 | if (ACPI_SUCCESS(status)) { |
1da177e4 | 860 | /* |
44f6c012 | 861 | * Return the object in the walk_state, unless the parent is a package - |
1da177e4 LT |
862 | * in this case, the return object will be stored in the parse tree |
863 | * for the package. | |
864 | */ | |
865 | if ((!op->common.parent) || | |
4be44fcd LB |
866 | ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && |
867 | (op->common.parent->common.aml_opcode != | |
868 | AML_VAR_PACKAGE_OP) | |
869 | && (op->common.parent->common.aml_opcode != | |
870 | AML_NAME_OP))) { | |
1da177e4 LT |
871 | walk_state->result_obj = obj_desc; |
872 | } | |
873 | } | |
874 | ||
4be44fcd | 875 | return_ACPI_STATUS(status); |
1da177e4 LT |
876 | } |
877 | ||
1da177e4 LT |
878 | /******************************************************************************* |
879 | * | |
880 | * FUNCTION: acpi_ds_exec_begin_control_op | |
881 | * | |
882 | * PARAMETERS: walk_list - The list that owns the walk stack | |
883 | * Op - The control Op | |
884 | * | |
885 | * RETURN: Status | |
886 | * | |
887 | * DESCRIPTION: Handles all control ops encountered during control method | |
888 | * execution. | |
889 | * | |
890 | ******************************************************************************/ | |
891 | ||
892 | acpi_status | |
4be44fcd LB |
893 | acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, |
894 | union acpi_parse_object *op) | |
1da177e4 | 895 | { |
4be44fcd LB |
896 | acpi_status status = AE_OK; |
897 | union acpi_generic_state *control_state; | |
1da177e4 | 898 | |
b229cf92 | 899 | ACPI_FUNCTION_NAME(ds_exec_begin_control_op); |
1da177e4 | 900 | |
4be44fcd LB |
901 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op, |
902 | op->common.aml_opcode, walk_state)); | |
1da177e4 LT |
903 | |
904 | switch (op->common.aml_opcode) { | |
905 | case AML_IF_OP: | |
906 | case AML_WHILE_OP: | |
907 | ||
908 | /* | |
909 | * IF/WHILE: Create a new control state to manage these | |
910 | * constructs. We need to manage these as a stack, in order | |
911 | * to handle nesting. | |
912 | */ | |
4be44fcd | 913 | control_state = acpi_ut_create_control_state(); |
1da177e4 LT |
914 | if (!control_state) { |
915 | status = AE_NO_MEMORY; | |
916 | break; | |
917 | } | |
918 | /* | |
919 | * Save a pointer to the predicate for multiple executions | |
920 | * of a loop | |
921 | */ | |
4be44fcd LB |
922 | control_state->control.aml_predicate_start = |
923 | walk_state->parser_state.aml - 1; | |
924 | control_state->control.package_end = | |
925 | walk_state->parser_state.pkg_end; | |
1da177e4 LT |
926 | control_state->control.opcode = op->common.aml_opcode; |
927 | ||
1da177e4 LT |
928 | /* Push the control state on this walk's control stack */ |
929 | ||
4be44fcd LB |
930 | acpi_ut_push_generic_state(&walk_state->control_state, |
931 | control_state); | |
1da177e4 LT |
932 | break; |
933 | ||
934 | case AML_ELSE_OP: | |
935 | ||
936 | /* Predicate is in the state object */ | |
937 | /* If predicate is true, the IF was executed, ignore ELSE part */ | |
938 | ||
939 | if (walk_state->last_predicate) { | |
940 | status = AE_CTRL_TRUE; | |
941 | } | |
942 | ||
943 | break; | |
944 | ||
945 | case AML_RETURN_OP: | |
946 | ||
947 | break; | |
948 | ||
949 | default: | |
950 | break; | |
951 | } | |
952 | ||
953 | return (status); | |
954 | } | |
955 | ||
1da177e4 LT |
956 | /******************************************************************************* |
957 | * | |
958 | * FUNCTION: acpi_ds_exec_end_control_op | |
959 | * | |
960 | * PARAMETERS: walk_list - The list that owns the walk stack | |
961 | * Op - The control Op | |
962 | * | |
963 | * RETURN: Status | |
964 | * | |
965 | * DESCRIPTION: Handles all control ops encountered during control method | |
966 | * execution. | |
967 | * | |
968 | ******************************************************************************/ | |
969 | ||
970 | acpi_status | |
4be44fcd LB |
971 | acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, |
972 | union acpi_parse_object * op) | |
1da177e4 | 973 | { |
4be44fcd LB |
974 | acpi_status status = AE_OK; |
975 | union acpi_generic_state *control_state; | |
1da177e4 | 976 | |
b229cf92 | 977 | ACPI_FUNCTION_NAME(ds_exec_end_control_op); |
1da177e4 LT |
978 | |
979 | switch (op->common.aml_opcode) { | |
980 | case AML_IF_OP: | |
981 | ||
4be44fcd | 982 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op)); |
1da177e4 LT |
983 | |
984 | /* | |
985 | * Save the result of the predicate in case there is an | |
986 | * ELSE to come | |
987 | */ | |
988 | walk_state->last_predicate = | |
4be44fcd | 989 | (u8) walk_state->control_state->common.value; |
1da177e4 LT |
990 | |
991 | /* | |
992 | * Pop the control state that was created at the start | |
993 | * of the IF and free it | |
994 | */ | |
4be44fcd LB |
995 | control_state = |
996 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
997 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
998 | break; |
999 | ||
1da177e4 LT |
1000 | case AML_ELSE_OP: |
1001 | ||
1002 | break; | |
1003 | ||
1da177e4 LT |
1004 | case AML_WHILE_OP: |
1005 | ||
4be44fcd | 1006 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); |
1da177e4 LT |
1007 | |
1008 | if (walk_state->control_state->common.value) { | |
52fc0b02 | 1009 | |
1da177e4 LT |
1010 | /* Predicate was true, go back and evaluate it again! */ |
1011 | ||
1012 | status = AE_CTRL_PENDING; | |
1013 | } | |
1014 | ||
4be44fcd LB |
1015 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1016 | "[WHILE_OP] termination! Op=%p\n", op)); | |
1da177e4 LT |
1017 | |
1018 | /* Pop this control state and free it */ | |
1019 | ||
4be44fcd LB |
1020 | control_state = |
1021 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1da177e4 | 1022 | |
4be44fcd LB |
1023 | walk_state->aml_last_while = |
1024 | control_state->control.aml_predicate_start; | |
1025 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1026 | break; |
1027 | ||
1da177e4 LT |
1028 | case AML_RETURN_OP: |
1029 | ||
4be44fcd LB |
1030 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1031 | "[RETURN_OP] Op=%p Arg=%p\n", op, | |
1032 | op->common.value.arg)); | |
1da177e4 LT |
1033 | |
1034 | /* | |
1035 | * One optional operand -- the return value | |
1036 | * It can be either an immediate operand or a result that | |
1037 | * has been bubbled up the tree | |
1038 | */ | |
1039 | if (op->common.value.arg) { | |
52fc0b02 | 1040 | |
1da177e4 LT |
1041 | /* Since we have a real Return(), delete any implicit return */ |
1042 | ||
4be44fcd | 1043 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1044 | |
1045 | /* Return statement has an immediate operand */ | |
1046 | ||
4be44fcd LB |
1047 | status = |
1048 | acpi_ds_create_operands(walk_state, | |
1049 | op->common.value.arg); | |
1050 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1051 | return (status); |
1052 | } | |
1053 | ||
1054 | /* | |
1055 | * If value being returned is a Reference (such as | |
1056 | * an arg or local), resolve it now because it may | |
1057 | * cease to exist at the end of the method. | |
1058 | */ | |
4be44fcd LB |
1059 | status = |
1060 | acpi_ex_resolve_to_value(&walk_state->operands[0], | |
1061 | walk_state); | |
1062 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1063 | return (status); |
1064 | } | |
1065 | ||
1066 | /* | |
1067 | * Get the return value and save as the last result | |
1068 | * value. This is the only place where walk_state->return_desc | |
1069 | * is set to anything other than zero! | |
1070 | */ | |
1071 | walk_state->return_desc = walk_state->operands[0]; | |
4be44fcd LB |
1072 | } else if ((walk_state->results) && |
1073 | (walk_state->results->results.num_results > 0)) { | |
52fc0b02 | 1074 | |
1da177e4 LT |
1075 | /* Since we have a real Return(), delete any implicit return */ |
1076 | ||
4be44fcd | 1077 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1078 | |
1079 | /* | |
1080 | * The return value has come from a previous calculation. | |
1081 | * | |
1082 | * If value being returned is a Reference (such as | |
1083 | * an arg or local), resolve it now because it may | |
1084 | * cease to exist at the end of the method. | |
1085 | * | |
1086 | * Allow references created by the Index operator to return unchanged. | |
1087 | */ | |
4be44fcd LB |
1088 | if ((ACPI_GET_DESCRIPTOR_TYPE |
1089 | (walk_state->results->results.obj_desc[0]) == | |
1090 | ACPI_DESC_TYPE_OPERAND) | |
1091 | && | |
1092 | (ACPI_GET_OBJECT_TYPE | |
1093 | (walk_state->results->results.obj_desc[0]) == | |
1094 | ACPI_TYPE_LOCAL_REFERENCE) | |
1095 | && ((walk_state->results->results.obj_desc[0])-> | |
1096 | reference.opcode != AML_INDEX_OP)) { | |
1097 | status = | |
1098 | acpi_ex_resolve_to_value(&walk_state-> | |
1099 | results->results. | |
1100 | obj_desc[0], | |
1101 | walk_state); | |
1102 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1103 | return (status); |
1104 | } | |
1105 | } | |
1106 | ||
4be44fcd LB |
1107 | walk_state->return_desc = |
1108 | walk_state->results->results.obj_desc[0]; | |
1109 | } else { | |
1da177e4 LT |
1110 | /* No return operand */ |
1111 | ||
1112 | if (walk_state->num_operands) { | |
4be44fcd LB |
1113 | acpi_ut_remove_reference(walk_state-> |
1114 | operands[0]); | |
1da177e4 LT |
1115 | } |
1116 | ||
4be44fcd LB |
1117 | walk_state->operands[0] = NULL; |
1118 | walk_state->num_operands = 0; | |
1119 | walk_state->return_desc = NULL; | |
1da177e4 LT |
1120 | } |
1121 | ||
4be44fcd | 1122 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
b229cf92 | 1123 | "Completed RETURN_OP State=%p, RetVal=%p\n", |
4be44fcd | 1124 | walk_state, walk_state->return_desc)); |
1da177e4 LT |
1125 | |
1126 | /* End the control method execution right now */ | |
1127 | ||
1128 | status = AE_CTRL_TERMINATE; | |
1129 | break; | |
1130 | ||
1da177e4 LT |
1131 | case AML_NOOP_OP: |
1132 | ||
1133 | /* Just do nothing! */ | |
1134 | break; | |
1135 | ||
1da177e4 LT |
1136 | case AML_BREAK_POINT_OP: |
1137 | ||
1138 | /* Call up to the OS service layer to handle this */ | |
1139 | ||
4be44fcd LB |
1140 | status = |
1141 | acpi_os_signal(ACPI_SIGNAL_BREAKPOINT, | |
1142 | "Executed AML Breakpoint opcode"); | |
1da177e4 LT |
1143 | |
1144 | /* If and when it returns, all done. */ | |
1145 | ||
1146 | break; | |
1147 | ||
1da177e4 | 1148 | case AML_BREAK_OP: |
4be44fcd | 1149 | case AML_CONTINUE_OP: /* ACPI 2.0 */ |
1da177e4 LT |
1150 | |
1151 | /* Pop and delete control states until we find a while */ | |
1152 | ||
1153 | while (walk_state->control_state && | |
4be44fcd LB |
1154 | (walk_state->control_state->control.opcode != |
1155 | AML_WHILE_OP)) { | |
1156 | control_state = | |
1157 | acpi_ut_pop_generic_state(&walk_state-> | |
1158 | control_state); | |
1159 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1160 | } |
1161 | ||
1162 | /* No while found? */ | |
1163 | ||
1164 | if (!walk_state->control_state) { | |
1165 | return (AE_AML_NO_WHILE); | |
1166 | } | |
1167 | ||
1168 | /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */ | |
1169 | ||
4be44fcd LB |
1170 | walk_state->aml_last_while = |
1171 | walk_state->control_state->control.package_end; | |
1da177e4 LT |
1172 | |
1173 | /* Return status depending on opcode */ | |
1174 | ||
1175 | if (op->common.aml_opcode == AML_BREAK_OP) { | |
1176 | status = AE_CTRL_BREAK; | |
4be44fcd | 1177 | } else { |
1da177e4 LT |
1178 | status = AE_CTRL_CONTINUE; |
1179 | } | |
1180 | break; | |
1181 | ||
1da177e4 LT |
1182 | default: |
1183 | ||
b8e4d893 BM |
1184 | ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p", |
1185 | op->common.aml_opcode, op)); | |
1da177e4 LT |
1186 | |
1187 | status = AE_AML_BAD_OPCODE; | |
1188 | break; | |
1189 | } | |
1190 | ||
1191 | return (status); | |
1192 | } |