]>
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, | |
df92e695 TR |
362 | (acpi_size) obj_desc->region.length, |
363 | acpi_ut_get_node_name(node)); | |
364 | ||
b229cf92 BM |
365 | if (ACPI_FAILURE(status)) { |
366 | /* | |
367 | * Invalid address/length. We will emit an error message and mark | |
368 | * the region as invalid, so that it will cause an additional error if | |
369 | * it is ever used. Then return AE_OK. | |
370 | */ | |
371 | ACPI_EXCEPTION((AE_INFO, status, | |
372 | "During address validation of OpRegion [%4.4s]", | |
373 | node->name.ascii)); | |
374 | obj_desc->common.flags |= AOPOBJ_INVALID; | |
375 | status = AE_OK; | |
376 | } | |
377 | ||
4be44fcd | 378 | return_ACPI_STATUS(status); |
1da177e4 LT |
379 | } |
380 | ||
44f6c012 | 381 | /******************************************************************************* |
1da177e4 LT |
382 | * |
383 | * FUNCTION: acpi_ds_initialize_region | |
384 | * | |
44f6c012 | 385 | * PARAMETERS: obj_handle - Region namespace node |
1da177e4 LT |
386 | * |
387 | * RETURN: Status | |
388 | * | |
389 | * DESCRIPTION: Front end to ev_initialize_region | |
390 | * | |
44f6c012 | 391 | ******************************************************************************/ |
1da177e4 | 392 | |
4be44fcd | 393 | acpi_status acpi_ds_initialize_region(acpi_handle obj_handle) |
1da177e4 | 394 | { |
4be44fcd LB |
395 | union acpi_operand_object *obj_desc; |
396 | acpi_status status; | |
1da177e4 | 397 | |
4be44fcd | 398 | obj_desc = acpi_ns_get_attached_object(obj_handle); |
1da177e4 LT |
399 | |
400 | /* Namespace is NOT locked */ | |
401 | ||
4be44fcd | 402 | status = acpi_ev_initialize_region(obj_desc, FALSE); |
1da177e4 LT |
403 | return (status); |
404 | } | |
405 | ||
44f6c012 | 406 | /******************************************************************************* |
1da177e4 LT |
407 | * |
408 | * FUNCTION: acpi_ds_init_buffer_field | |
409 | * | |
410 | * PARAMETERS: aml_opcode - create_xxx_field | |
411 | * obj_desc - buffer_field object | |
412 | * buffer_desc - Host Buffer | |
413 | * offset_desc - Offset into buffer | |
44f6c012 RM |
414 | * length_desc - Length of field (CREATE_FIELD_OP only) |
415 | * result_desc - Where to store the result | |
1da177e4 LT |
416 | * |
417 | * RETURN: Status | |
418 | * | |
419 | * DESCRIPTION: Perform actual initialization of a buffer field | |
420 | * | |
44f6c012 | 421 | ******************************************************************************/ |
1da177e4 | 422 | |
44f6c012 | 423 | static acpi_status |
4be44fcd LB |
424 | acpi_ds_init_buffer_field(u16 aml_opcode, |
425 | union acpi_operand_object *obj_desc, | |
426 | union acpi_operand_object *buffer_desc, | |
427 | union acpi_operand_object *offset_desc, | |
428 | union acpi_operand_object *length_desc, | |
429 | union acpi_operand_object *result_desc) | |
1da177e4 | 430 | { |
4be44fcd LB |
431 | u32 offset; |
432 | u32 bit_offset; | |
433 | u32 bit_count; | |
434 | u8 field_flags; | |
435 | acpi_status status; | |
1da177e4 | 436 | |
b229cf92 | 437 | ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc); |
1da177e4 LT |
438 | |
439 | /* Host object must be a Buffer */ | |
440 | ||
4be44fcd | 441 | if (ACPI_GET_OBJECT_TYPE(buffer_desc) != ACPI_TYPE_BUFFER) { |
b8e4d893 BM |
442 | ACPI_ERROR((AE_INFO, |
443 | "Target of Create Field is not a Buffer object - %s", | |
444 | acpi_ut_get_object_type_name(buffer_desc))); | |
1da177e4 LT |
445 | |
446 | status = AE_AML_OPERAND_TYPE; | |
447 | goto cleanup; | |
448 | } | |
449 | ||
450 | /* | |
451 | * The last parameter to all of these opcodes (result_desc) started | |
452 | * out as a name_string, and should therefore now be a NS node | |
453 | * after resolution in acpi_ex_resolve_operands(). | |
454 | */ | |
4be44fcd | 455 | if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) { |
b8e4d893 BM |
456 | ACPI_ERROR((AE_INFO, |
457 | "(%s) destination not a NS Node [%s]", | |
458 | acpi_ps_get_opcode_name(aml_opcode), | |
459 | acpi_ut_get_descriptor_name(result_desc))); | |
1da177e4 LT |
460 | |
461 | status = AE_AML_OPERAND_TYPE; | |
462 | goto cleanup; | |
463 | } | |
464 | ||
465 | offset = (u32) offset_desc->integer.value; | |
466 | ||
467 | /* | |
468 | * Setup the Bit offsets and counts, according to the opcode | |
469 | */ | |
470 | switch (aml_opcode) { | |
471 | case AML_CREATE_FIELD_OP: | |
472 | ||
473 | /* Offset is in bits, count is in bits */ | |
474 | ||
44f6c012 | 475 | field_flags = AML_FIELD_ACCESS_BYTE; |
1da177e4 | 476 | bit_offset = offset; |
4be44fcd | 477 | bit_count = (u32) length_desc->integer.value; |
44f6c012 RM |
478 | |
479 | /* Must have a valid (>0) bit count */ | |
480 | ||
481 | if (bit_count == 0) { | |
b8e4d893 | 482 | ACPI_ERROR((AE_INFO, |
b229cf92 | 483 | "Attempt to CreateField of length zero")); |
44f6c012 RM |
484 | status = AE_AML_OPERAND_VALUE; |
485 | goto cleanup; | |
486 | } | |
1da177e4 LT |
487 | break; |
488 | ||
489 | case AML_CREATE_BIT_FIELD_OP: | |
490 | ||
491 | /* Offset is in bits, Field is one bit */ | |
492 | ||
493 | bit_offset = offset; | |
4be44fcd | 494 | bit_count = 1; |
1da177e4 LT |
495 | field_flags = AML_FIELD_ACCESS_BYTE; |
496 | break; | |
497 | ||
498 | case AML_CREATE_BYTE_FIELD_OP: | |
499 | ||
500 | /* Offset is in bytes, field is one byte */ | |
501 | ||
502 | bit_offset = 8 * offset; | |
4be44fcd | 503 | bit_count = 8; |
1da177e4 LT |
504 | field_flags = AML_FIELD_ACCESS_BYTE; |
505 | break; | |
506 | ||
507 | case AML_CREATE_WORD_FIELD_OP: | |
508 | ||
509 | /* Offset is in bytes, field is one word */ | |
510 | ||
511 | bit_offset = 8 * offset; | |
4be44fcd | 512 | bit_count = 16; |
1da177e4 LT |
513 | field_flags = AML_FIELD_ACCESS_WORD; |
514 | break; | |
515 | ||
516 | case AML_CREATE_DWORD_FIELD_OP: | |
517 | ||
518 | /* Offset is in bytes, field is one dword */ | |
519 | ||
520 | bit_offset = 8 * offset; | |
4be44fcd | 521 | bit_count = 32; |
1da177e4 LT |
522 | field_flags = AML_FIELD_ACCESS_DWORD; |
523 | break; | |
524 | ||
525 | case AML_CREATE_QWORD_FIELD_OP: | |
526 | ||
527 | /* Offset is in bytes, field is one qword */ | |
528 | ||
529 | bit_offset = 8 * offset; | |
4be44fcd | 530 | bit_count = 64; |
1da177e4 LT |
531 | field_flags = AML_FIELD_ACCESS_QWORD; |
532 | break; | |
533 | ||
534 | default: | |
535 | ||
b8e4d893 BM |
536 | ACPI_ERROR((AE_INFO, |
537 | "Unknown field creation opcode %02x", aml_opcode)); | |
1da177e4 LT |
538 | status = AE_AML_BAD_OPCODE; |
539 | goto cleanup; | |
540 | } | |
541 | ||
542 | /* Entire field must fit within the current length of the buffer */ | |
543 | ||
4be44fcd | 544 | if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) { |
b8e4d893 BM |
545 | ACPI_ERROR((AE_INFO, |
546 | "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)", | |
547 | acpi_ut_get_node_name(result_desc), | |
548 | bit_offset + bit_count, | |
549 | acpi_ut_get_node_name(buffer_desc->buffer.node), | |
550 | 8 * (u32) buffer_desc->buffer.length)); | |
1da177e4 LT |
551 | status = AE_AML_BUFFER_LIMIT; |
552 | goto cleanup; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Initialize areas of the field object that are common to all fields | |
44f6c012 RM |
557 | * For field_flags, use LOCK_RULE = 0 (NO_LOCK), |
558 | * UPDATE_RULE = 0 (UPDATE_PRESERVE) | |
1da177e4 | 559 | */ |
4be44fcd LB |
560 | status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0, |
561 | bit_offset, bit_count); | |
562 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
563 | goto cleanup; |
564 | } | |
565 | ||
566 | obj_desc->buffer_field.buffer_obj = buffer_desc; | |
567 | ||
568 | /* Reference count for buffer_desc inherits obj_desc count */ | |
569 | ||
44f6c012 | 570 | buffer_desc->common.reference_count = (u16) |
4be44fcd LB |
571 | (buffer_desc->common.reference_count + |
572 | obj_desc->common.reference_count); | |
1da177e4 | 573 | |
4be44fcd | 574 | cleanup: |
1da177e4 LT |
575 | |
576 | /* Always delete the operands */ | |
577 | ||
4be44fcd LB |
578 | acpi_ut_remove_reference(offset_desc); |
579 | acpi_ut_remove_reference(buffer_desc); | |
1da177e4 LT |
580 | |
581 | if (aml_opcode == AML_CREATE_FIELD_OP) { | |
4be44fcd | 582 | acpi_ut_remove_reference(length_desc); |
1da177e4 LT |
583 | } |
584 | ||
585 | /* On failure, delete the result descriptor */ | |
586 | ||
4be44fcd LB |
587 | if (ACPI_FAILURE(status)) { |
588 | acpi_ut_remove_reference(result_desc); /* Result descriptor */ | |
589 | } else { | |
1da177e4 LT |
590 | /* Now the address and length are valid for this buffer_field */ |
591 | ||
592 | obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID; | |
593 | } | |
594 | ||
4be44fcd | 595 | return_ACPI_STATUS(status); |
1da177e4 LT |
596 | } |
597 | ||
44f6c012 | 598 | /******************************************************************************* |
1da177e4 LT |
599 | * |
600 | * FUNCTION: acpi_ds_eval_buffer_field_operands | |
601 | * | |
602 | * PARAMETERS: walk_state - Current walk | |
603 | * Op - A valid buffer_field Op object | |
604 | * | |
605 | * RETURN: Status | |
606 | * | |
607 | * DESCRIPTION: Get buffer_field Buffer and Index | |
608 | * Called from acpi_ds_exec_end_op during buffer_field parse tree walk | |
609 | * | |
44f6c012 | 610 | ******************************************************************************/ |
1da177e4 LT |
611 | |
612 | acpi_status | |
4be44fcd LB |
613 | acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state, |
614 | union acpi_parse_object *op) | |
1da177e4 | 615 | { |
4be44fcd LB |
616 | acpi_status status; |
617 | union acpi_operand_object *obj_desc; | |
618 | struct acpi_namespace_node *node; | |
619 | union acpi_parse_object *next_op; | |
1da177e4 | 620 | |
b229cf92 | 621 | ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op); |
1da177e4 LT |
622 | |
623 | /* | |
624 | * This is where we evaluate the address and length fields of the | |
625 | * create_xxx_field declaration | |
626 | */ | |
4be44fcd | 627 | node = op->common.node; |
1da177e4 LT |
628 | |
629 | /* next_op points to the op that holds the Buffer */ | |
630 | ||
631 | next_op = op->common.value.arg; | |
632 | ||
633 | /* Evaluate/create the address and length operands */ | |
634 | ||
4be44fcd LB |
635 | status = acpi_ds_create_operands(walk_state, next_op); |
636 | if (ACPI_FAILURE(status)) { | |
637 | return_ACPI_STATUS(status); | |
1da177e4 LT |
638 | } |
639 | ||
4be44fcd | 640 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 641 | if (!obj_desc) { |
4be44fcd | 642 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
643 | } |
644 | ||
645 | /* Resolve the operands */ | |
646 | ||
4be44fcd LB |
647 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
648 | ACPI_WALK_OPERANDS, walk_state); | |
1da177e4 | 649 | |
4be44fcd LB |
650 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
651 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
652 | walk_state->num_operands, | |
b229cf92 | 653 | "after AcpiExResolveOperands"); |
1da177e4 | 654 | |
4be44fcd | 655 | if (ACPI_FAILURE(status)) { |
b8e4d893 BM |
656 | ACPI_ERROR((AE_INFO, "(%s) bad operand(s) (%X)", |
657 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
658 | status)); | |
1da177e4 | 659 | |
4be44fcd | 660 | return_ACPI_STATUS(status); |
1da177e4 LT |
661 | } |
662 | ||
663 | /* Initialize the Buffer Field */ | |
664 | ||
665 | if (op->common.aml_opcode == AML_CREATE_FIELD_OP) { | |
52fc0b02 | 666 | |
1da177e4 LT |
667 | /* NOTE: Slightly different operands for this opcode */ |
668 | ||
4be44fcd LB |
669 | status = |
670 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
671 | walk_state->operands[0], | |
672 | walk_state->operands[1], | |
673 | walk_state->operands[2], | |
674 | walk_state->operands[3]); | |
675 | } else { | |
1da177e4 LT |
676 | /* All other, create_xxx_field opcodes */ |
677 | ||
4be44fcd LB |
678 | status = |
679 | acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc, | |
680 | walk_state->operands[0], | |
681 | walk_state->operands[1], NULL, | |
682 | walk_state->operands[2]); | |
1da177e4 LT |
683 | } |
684 | ||
4be44fcd | 685 | return_ACPI_STATUS(status); |
1da177e4 LT |
686 | } |
687 | ||
44f6c012 | 688 | /******************************************************************************* |
1da177e4 LT |
689 | * |
690 | * FUNCTION: acpi_ds_eval_region_operands | |
691 | * | |
692 | * PARAMETERS: walk_state - Current walk | |
693 | * Op - A valid region Op object | |
694 | * | |
695 | * RETURN: Status | |
696 | * | |
697 | * DESCRIPTION: Get region address and length | |
698 | * Called from acpi_ds_exec_end_op during op_region parse tree walk | |
699 | * | |
44f6c012 | 700 | ******************************************************************************/ |
1da177e4 LT |
701 | |
702 | acpi_status | |
4be44fcd LB |
703 | acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state, |
704 | union acpi_parse_object *op) | |
1da177e4 | 705 | { |
4be44fcd LB |
706 | acpi_status status; |
707 | union acpi_operand_object *obj_desc; | |
708 | union acpi_operand_object *operand_desc; | |
709 | struct acpi_namespace_node *node; | |
710 | union acpi_parse_object *next_op; | |
1da177e4 | 711 | |
b229cf92 | 712 | ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op); |
1da177e4 LT |
713 | |
714 | /* | |
44f6c012 RM |
715 | * This is where we evaluate the address and length fields of the |
716 | * op_region declaration | |
1da177e4 | 717 | */ |
4be44fcd | 718 | node = op->common.node; |
1da177e4 LT |
719 | |
720 | /* next_op points to the op that holds the space_iD */ | |
721 | ||
722 | next_op = op->common.value.arg; | |
723 | ||
724 | /* next_op points to address op */ | |
725 | ||
726 | next_op = next_op->common.next; | |
727 | ||
728 | /* Evaluate/create the address and length operands */ | |
729 | ||
4be44fcd LB |
730 | status = acpi_ds_create_operands(walk_state, next_op); |
731 | if (ACPI_FAILURE(status)) { | |
732 | return_ACPI_STATUS(status); | |
1da177e4 LT |
733 | } |
734 | ||
735 | /* Resolve the length and address operands to numbers */ | |
736 | ||
4be44fcd LB |
737 | status = acpi_ex_resolve_operands(op->common.aml_opcode, |
738 | ACPI_WALK_OPERANDS, walk_state); | |
739 | if (ACPI_FAILURE(status)) { | |
740 | return_ACPI_STATUS(status); | |
1da177e4 LT |
741 | } |
742 | ||
4be44fcd LB |
743 | ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS, ACPI_IMODE_EXECUTE, |
744 | acpi_ps_get_opcode_name(op->common.aml_opcode), | |
b229cf92 | 745 | 1, "after AcpiExResolveOperands"); |
1da177e4 | 746 | |
4be44fcd | 747 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 748 | if (!obj_desc) { |
4be44fcd | 749 | return_ACPI_STATUS(AE_NOT_EXIST); |
1da177e4 LT |
750 | } |
751 | ||
752 | /* | |
753 | * Get the length operand and save it | |
754 | * (at Top of stack) | |
755 | */ | |
756 | operand_desc = walk_state->operands[walk_state->num_operands - 1]; | |
757 | ||
758 | obj_desc->region.length = (u32) operand_desc->integer.value; | |
4be44fcd | 759 | acpi_ut_remove_reference(operand_desc); |
1da177e4 LT |
760 | |
761 | /* | |
762 | * Get the address and save it | |
763 | * (at top of stack - 1) | |
764 | */ | |
765 | operand_desc = walk_state->operands[walk_state->num_operands - 2]; | |
766 | ||
44f6c012 | 767 | obj_desc->region.address = (acpi_physical_address) |
4be44fcd LB |
768 | operand_desc->integer.value; |
769 | acpi_ut_remove_reference(operand_desc); | |
1da177e4 | 770 | |
b229cf92 | 771 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n", |
4be44fcd LB |
772 | obj_desc, |
773 | ACPI_FORMAT_UINT64(obj_desc->region.address), | |
774 | obj_desc->region.length)); | |
1da177e4 LT |
775 | |
776 | /* Now the address and length are valid for this opregion */ | |
777 | ||
778 | obj_desc->region.flags |= AOPOBJ_DATA_VALID; | |
779 | ||
4be44fcd | 780 | return_ACPI_STATUS(status); |
1da177e4 LT |
781 | } |
782 | ||
44f6c012 | 783 | /******************************************************************************* |
1da177e4 LT |
784 | * |
785 | * FUNCTION: acpi_ds_eval_data_object_operands | |
786 | * | |
787 | * PARAMETERS: walk_state - Current walk | |
788 | * Op - A valid data_object Op object | |
789 | * obj_desc - data_object | |
790 | * | |
791 | * RETURN: Status | |
792 | * | |
793 | * DESCRIPTION: Get the operands and complete the following data object types: | |
794 | * Buffer, Package. | |
795 | * | |
44f6c012 | 796 | ******************************************************************************/ |
1da177e4 LT |
797 | |
798 | acpi_status | |
4be44fcd LB |
799 | acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state, |
800 | union acpi_parse_object *op, | |
801 | union acpi_operand_object *obj_desc) | |
1da177e4 | 802 | { |
4be44fcd LB |
803 | acpi_status status; |
804 | union acpi_operand_object *arg_desc; | |
805 | u32 length; | |
1da177e4 | 806 | |
b229cf92 | 807 | ACPI_FUNCTION_TRACE(ds_eval_data_object_operands); |
1da177e4 LT |
808 | |
809 | /* The first operand (for all of these data objects) is the length */ | |
810 | ||
773069d4 BM |
811 | /* |
812 | * Set proper index into operand stack for acpi_ds_obj_stack_push | |
813 | * invoked inside acpi_ds_create_operand. | |
814 | */ | |
815 | walk_state->operand_index = walk_state->num_operands; | |
816 | ||
4be44fcd LB |
817 | status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1); |
818 | if (ACPI_FAILURE(status)) { | |
819 | return_ACPI_STATUS(status); | |
1da177e4 LT |
820 | } |
821 | ||
4be44fcd LB |
822 | status = acpi_ex_resolve_operands(walk_state->opcode, |
823 | &(walk_state-> | |
824 | operands[walk_state->num_operands - | |
825 | 1]), walk_state); | |
826 | if (ACPI_FAILURE(status)) { | |
827 | return_ACPI_STATUS(status); | |
1da177e4 LT |
828 | } |
829 | ||
830 | /* Extract length operand */ | |
831 | ||
4be44fcd | 832 | arg_desc = walk_state->operands[walk_state->num_operands - 1]; |
1da177e4 LT |
833 | length = (u32) arg_desc->integer.value; |
834 | ||
835 | /* Cleanup for length operand */ | |
836 | ||
4be44fcd LB |
837 | status = acpi_ds_obj_stack_pop(1, walk_state); |
838 | if (ACPI_FAILURE(status)) { | |
839 | return_ACPI_STATUS(status); | |
1da177e4 LT |
840 | } |
841 | ||
4be44fcd | 842 | acpi_ut_remove_reference(arg_desc); |
1da177e4 LT |
843 | |
844 | /* | |
845 | * Create the actual data object | |
846 | */ | |
847 | switch (op->common.aml_opcode) { | |
848 | case AML_BUFFER_OP: | |
849 | ||
4be44fcd LB |
850 | status = |
851 | acpi_ds_build_internal_buffer_obj(walk_state, op, length, | |
852 | &obj_desc); | |
1da177e4 LT |
853 | break; |
854 | ||
855 | case AML_PACKAGE_OP: | |
856 | case AML_VAR_PACKAGE_OP: | |
857 | ||
4be44fcd LB |
858 | status = |
859 | acpi_ds_build_internal_package_obj(walk_state, op, length, | |
860 | &obj_desc); | |
1da177e4 LT |
861 | break; |
862 | ||
863 | default: | |
4be44fcd | 864 | return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
1da177e4 LT |
865 | } |
866 | ||
4be44fcd | 867 | if (ACPI_SUCCESS(status)) { |
1da177e4 | 868 | /* |
44f6c012 | 869 | * Return the object in the walk_state, unless the parent is a package - |
1da177e4 LT |
870 | * in this case, the return object will be stored in the parse tree |
871 | * for the package. | |
872 | */ | |
873 | if ((!op->common.parent) || | |
4be44fcd LB |
874 | ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) && |
875 | (op->common.parent->common.aml_opcode != | |
876 | AML_VAR_PACKAGE_OP) | |
fd350943 | 877 | && (op->common.parent->common.aml_opcode != AML_NAME_OP))) { |
1da177e4 LT |
878 | walk_state->result_obj = obj_desc; |
879 | } | |
880 | } | |
881 | ||
4be44fcd | 882 | return_ACPI_STATUS(status); |
1da177e4 LT |
883 | } |
884 | ||
1da177e4 LT |
885 | /******************************************************************************* |
886 | * | |
887 | * FUNCTION: acpi_ds_exec_begin_control_op | |
888 | * | |
889 | * PARAMETERS: walk_list - The list that owns the walk stack | |
890 | * Op - The control Op | |
891 | * | |
892 | * RETURN: Status | |
893 | * | |
894 | * DESCRIPTION: Handles all control ops encountered during control method | |
895 | * execution. | |
896 | * | |
897 | ******************************************************************************/ | |
898 | ||
899 | acpi_status | |
4be44fcd LB |
900 | acpi_ds_exec_begin_control_op(struct acpi_walk_state *walk_state, |
901 | union acpi_parse_object *op) | |
1da177e4 | 902 | { |
4be44fcd LB |
903 | acpi_status status = AE_OK; |
904 | union acpi_generic_state *control_state; | |
1da177e4 | 905 | |
b229cf92 | 906 | ACPI_FUNCTION_NAME(ds_exec_begin_control_op); |
1da177e4 | 907 | |
4be44fcd LB |
908 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p Opcode=%2.2X State=%p\n", op, |
909 | op->common.aml_opcode, walk_state)); | |
1da177e4 LT |
910 | |
911 | switch (op->common.aml_opcode) { | |
912 | case AML_IF_OP: | |
913 | case AML_WHILE_OP: | |
914 | ||
915 | /* | |
916 | * IF/WHILE: Create a new control state to manage these | |
917 | * constructs. We need to manage these as a stack, in order | |
918 | * to handle nesting. | |
919 | */ | |
4be44fcd | 920 | control_state = acpi_ut_create_control_state(); |
1da177e4 LT |
921 | if (!control_state) { |
922 | status = AE_NO_MEMORY; | |
923 | break; | |
924 | } | |
925 | /* | |
926 | * Save a pointer to the predicate for multiple executions | |
927 | * of a loop | |
928 | */ | |
4be44fcd LB |
929 | control_state->control.aml_predicate_start = |
930 | walk_state->parser_state.aml - 1; | |
931 | control_state->control.package_end = | |
932 | walk_state->parser_state.pkg_end; | |
1da177e4 LT |
933 | control_state->control.opcode = op->common.aml_opcode; |
934 | ||
1da177e4 LT |
935 | /* Push the control state on this walk's control stack */ |
936 | ||
4be44fcd LB |
937 | acpi_ut_push_generic_state(&walk_state->control_state, |
938 | control_state); | |
1da177e4 LT |
939 | break; |
940 | ||
941 | case AML_ELSE_OP: | |
942 | ||
943 | /* Predicate is in the state object */ | |
944 | /* If predicate is true, the IF was executed, ignore ELSE part */ | |
945 | ||
946 | if (walk_state->last_predicate) { | |
947 | status = AE_CTRL_TRUE; | |
948 | } | |
949 | ||
950 | break; | |
951 | ||
952 | case AML_RETURN_OP: | |
953 | ||
954 | break; | |
955 | ||
956 | default: | |
957 | break; | |
958 | } | |
959 | ||
960 | return (status); | |
961 | } | |
962 | ||
1da177e4 LT |
963 | /******************************************************************************* |
964 | * | |
965 | * FUNCTION: acpi_ds_exec_end_control_op | |
966 | * | |
967 | * PARAMETERS: walk_list - The list that owns the walk stack | |
968 | * Op - The control Op | |
969 | * | |
970 | * RETURN: Status | |
971 | * | |
972 | * DESCRIPTION: Handles all control ops encountered during control method | |
973 | * execution. | |
974 | * | |
975 | ******************************************************************************/ | |
976 | ||
977 | acpi_status | |
4be44fcd LB |
978 | acpi_ds_exec_end_control_op(struct acpi_walk_state * walk_state, |
979 | union acpi_parse_object * op) | |
1da177e4 | 980 | { |
4be44fcd LB |
981 | acpi_status status = AE_OK; |
982 | union acpi_generic_state *control_state; | |
1da177e4 | 983 | |
b229cf92 | 984 | ACPI_FUNCTION_NAME(ds_exec_end_control_op); |
1da177e4 LT |
985 | |
986 | switch (op->common.aml_opcode) { | |
987 | case AML_IF_OP: | |
988 | ||
4be44fcd | 989 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[IF_OP] Op=%p\n", op)); |
1da177e4 LT |
990 | |
991 | /* | |
992 | * Save the result of the predicate in case there is an | |
993 | * ELSE to come | |
994 | */ | |
995 | walk_state->last_predicate = | |
4be44fcd | 996 | (u8) walk_state->control_state->common.value; |
1da177e4 LT |
997 | |
998 | /* | |
999 | * Pop the control state that was created at the start | |
1000 | * of the IF and free it | |
1001 | */ | |
4be44fcd LB |
1002 | control_state = |
1003 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1004 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1005 | break; |
1006 | ||
1da177e4 LT |
1007 | case AML_ELSE_OP: |
1008 | ||
1009 | break; | |
1010 | ||
1da177e4 LT |
1011 | case AML_WHILE_OP: |
1012 | ||
4be44fcd | 1013 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "[WHILE_OP] Op=%p\n", op)); |
1da177e4 LT |
1014 | |
1015 | if (walk_state->control_state->common.value) { | |
52fc0b02 | 1016 | |
1da177e4 LT |
1017 | /* Predicate was true, go back and evaluate it again! */ |
1018 | ||
1019 | status = AE_CTRL_PENDING; | |
1020 | } | |
1021 | ||
4be44fcd LB |
1022 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1023 | "[WHILE_OP] termination! Op=%p\n", op)); | |
1da177e4 LT |
1024 | |
1025 | /* Pop this control state and free it */ | |
1026 | ||
4be44fcd LB |
1027 | control_state = |
1028 | acpi_ut_pop_generic_state(&walk_state->control_state); | |
1da177e4 | 1029 | |
4be44fcd LB |
1030 | walk_state->aml_last_while = |
1031 | control_state->control.aml_predicate_start; | |
1032 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1033 | break; |
1034 | ||
1da177e4 LT |
1035 | case AML_RETURN_OP: |
1036 | ||
4be44fcd LB |
1037 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
1038 | "[RETURN_OP] Op=%p Arg=%p\n", op, | |
1039 | op->common.value.arg)); | |
1da177e4 LT |
1040 | |
1041 | /* | |
1042 | * One optional operand -- the return value | |
1043 | * It can be either an immediate operand or a result that | |
1044 | * has been bubbled up the tree | |
1045 | */ | |
1046 | if (op->common.value.arg) { | |
52fc0b02 | 1047 | |
1da177e4 LT |
1048 | /* Since we have a real Return(), delete any implicit return */ |
1049 | ||
4be44fcd | 1050 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1051 | |
1052 | /* Return statement has an immediate operand */ | |
1053 | ||
4be44fcd LB |
1054 | status = |
1055 | acpi_ds_create_operands(walk_state, | |
1056 | op->common.value.arg); | |
1057 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1058 | return (status); |
1059 | } | |
1060 | ||
1061 | /* | |
1062 | * If value being returned is a Reference (such as | |
1063 | * an arg or local), resolve it now because it may | |
1064 | * cease to exist at the end of the method. | |
1065 | */ | |
4be44fcd LB |
1066 | status = |
1067 | acpi_ex_resolve_to_value(&walk_state->operands[0], | |
1068 | walk_state); | |
1069 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1070 | return (status); |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * Get the return value and save as the last result | |
1075 | * value. This is the only place where walk_state->return_desc | |
1076 | * is set to anything other than zero! | |
1077 | */ | |
1078 | walk_state->return_desc = walk_state->operands[0]; | |
773069d4 | 1079 | } else if (walk_state->result_count) { |
52fc0b02 | 1080 | |
1da177e4 LT |
1081 | /* Since we have a real Return(), delete any implicit return */ |
1082 | ||
4be44fcd | 1083 | acpi_ds_clear_implicit_return(walk_state); |
1da177e4 LT |
1084 | |
1085 | /* | |
1086 | * The return value has come from a previous calculation. | |
1087 | * | |
1088 | * If value being returned is a Reference (such as | |
1089 | * an arg or local), resolve it now because it may | |
1090 | * cease to exist at the end of the method. | |
1091 | * | |
1092 | * Allow references created by the Index operator to return unchanged. | |
1093 | */ | |
4be44fcd LB |
1094 | if ((ACPI_GET_DESCRIPTOR_TYPE |
1095 | (walk_state->results->results.obj_desc[0]) == | |
1096 | ACPI_DESC_TYPE_OPERAND) | |
1097 | && | |
1098 | (ACPI_GET_OBJECT_TYPE | |
1099 | (walk_state->results->results.obj_desc[0]) == | |
1100 | ACPI_TYPE_LOCAL_REFERENCE) | |
1101 | && ((walk_state->results->results.obj_desc[0])-> | |
1102 | reference.opcode != AML_INDEX_OP)) { | |
1103 | status = | |
1104 | acpi_ex_resolve_to_value(&walk_state-> | |
1105 | results->results. | |
1106 | obj_desc[0], | |
1107 | walk_state); | |
1108 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
1109 | return (status); |
1110 | } | |
1111 | } | |
1112 | ||
4be44fcd LB |
1113 | walk_state->return_desc = |
1114 | walk_state->results->results.obj_desc[0]; | |
1115 | } else { | |
1da177e4 LT |
1116 | /* No return operand */ |
1117 | ||
1118 | if (walk_state->num_operands) { | |
4be44fcd LB |
1119 | acpi_ut_remove_reference(walk_state-> |
1120 | operands[0]); | |
1da177e4 LT |
1121 | } |
1122 | ||
4be44fcd LB |
1123 | walk_state->operands[0] = NULL; |
1124 | walk_state->num_operands = 0; | |
1125 | walk_state->return_desc = NULL; | |
1da177e4 LT |
1126 | } |
1127 | ||
4be44fcd | 1128 | ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
b229cf92 | 1129 | "Completed RETURN_OP State=%p, RetVal=%p\n", |
4be44fcd | 1130 | walk_state, walk_state->return_desc)); |
1da177e4 LT |
1131 | |
1132 | /* End the control method execution right now */ | |
1133 | ||
1134 | status = AE_CTRL_TERMINATE; | |
1135 | break; | |
1136 | ||
1da177e4 LT |
1137 | case AML_NOOP_OP: |
1138 | ||
1139 | /* Just do nothing! */ | |
1140 | break; | |
1141 | ||
1da177e4 LT |
1142 | case AML_BREAK_POINT_OP: |
1143 | ||
1144 | /* Call up to the OS service layer to handle this */ | |
1145 | ||
4be44fcd LB |
1146 | status = |
1147 | acpi_os_signal(ACPI_SIGNAL_BREAKPOINT, | |
1148 | "Executed AML Breakpoint opcode"); | |
1da177e4 LT |
1149 | |
1150 | /* If and when it returns, all done. */ | |
1151 | ||
1152 | break; | |
1153 | ||
1da177e4 | 1154 | case AML_BREAK_OP: |
4be44fcd | 1155 | case AML_CONTINUE_OP: /* ACPI 2.0 */ |
1da177e4 LT |
1156 | |
1157 | /* Pop and delete control states until we find a while */ | |
1158 | ||
1159 | while (walk_state->control_state && | |
4be44fcd LB |
1160 | (walk_state->control_state->control.opcode != |
1161 | AML_WHILE_OP)) { | |
1162 | control_state = | |
1163 | acpi_ut_pop_generic_state(&walk_state-> | |
1164 | control_state); | |
1165 | acpi_ut_delete_generic_state(control_state); | |
1da177e4 LT |
1166 | } |
1167 | ||
1168 | /* No while found? */ | |
1169 | ||
1170 | if (!walk_state->control_state) { | |
1171 | return (AE_AML_NO_WHILE); | |
1172 | } | |
1173 | ||
1174 | /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */ | |
1175 | ||
4be44fcd LB |
1176 | walk_state->aml_last_while = |
1177 | walk_state->control_state->control.package_end; | |
1da177e4 LT |
1178 | |
1179 | /* Return status depending on opcode */ | |
1180 | ||
1181 | if (op->common.aml_opcode == AML_BREAK_OP) { | |
1182 | status = AE_CTRL_BREAK; | |
4be44fcd | 1183 | } else { |
1da177e4 LT |
1184 | status = AE_CTRL_CONTINUE; |
1185 | } | |
1186 | break; | |
1187 | ||
1da177e4 LT |
1188 | default: |
1189 | ||
b8e4d893 BM |
1190 | ACPI_ERROR((AE_INFO, "Unknown control opcode=%X Op=%p", |
1191 | op->common.aml_opcode, op)); | |
1da177e4 LT |
1192 | |
1193 | status = AE_AML_BAD_OPCODE; | |
1194 | break; | |
1195 | } | |
1196 | ||
1197 | return (status); | |
1198 | } |