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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: uteval - Object evaluation | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
8 | * Copyright (C) 2000 - 2005, R. Byron Moore | |
9 | * All rights reserved. | |
10 | * | |
11 | * Redistribution and use in source and binary forms, with or without | |
12 | * modification, are permitted provided that the following conditions | |
13 | * are met: | |
14 | * 1. Redistributions of source code must retain the above copyright | |
15 | * notice, this list of conditions, and the following disclaimer, | |
16 | * without modification. | |
17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
18 | * substantially similar to the "NO WARRANTY" disclaimer below | |
19 | * ("Disclaimer") and any redistribution must be conditioned upon | |
20 | * including a substantially similar Disclaimer requirement for further | |
21 | * binary redistribution. | |
22 | * 3. Neither the names of the above-listed copyright holders nor the names | |
23 | * of any contributors may be used to endorse or promote products derived | |
24 | * from this software without specific prior written permission. | |
25 | * | |
26 | * Alternatively, this software may be distributed under the terms of the | |
27 | * GNU General Public License ("GPL") version 2 as published by the Free | |
28 | * Software Foundation. | |
29 | * | |
30 | * NO WARRANTY | |
31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
41 | * POSSIBILITY OF SUCH DAMAGES. | |
42 | */ | |
43 | ||
44 | ||
45 | #include <acpi/acpi.h> | |
46 | #include <acpi/acnamesp.h> | |
47 | #include <acpi/acinterp.h> | |
48 | ||
49 | ||
50 | #define _COMPONENT ACPI_UTILITIES | |
51 | ACPI_MODULE_NAME ("uteval") | |
52 | ||
53 | ||
54 | /******************************************************************************* | |
55 | * | |
56 | * FUNCTION: acpi_ut_osi_implementation | |
57 | * | |
58 | * PARAMETERS: walk_state - Current walk state | |
59 | * | |
60 | * RETURN: Status | |
61 | * | |
62 | * DESCRIPTION: Implementation of _OSI predefined control method | |
63 | * Supported = _OSI (String) | |
64 | * | |
65 | ******************************************************************************/ | |
66 | ||
67 | acpi_status | |
68 | acpi_ut_osi_implementation ( | |
69 | struct acpi_walk_state *walk_state) | |
70 | { | |
71 | union acpi_operand_object *string_desc; | |
72 | union acpi_operand_object *return_desc; | |
73 | acpi_native_uint i; | |
74 | ||
75 | ||
76 | ACPI_FUNCTION_TRACE ("ut_osi_implementation"); | |
77 | ||
78 | ||
79 | /* Validate the string input argument */ | |
80 | ||
81 | string_desc = walk_state->arguments[0].object; | |
82 | if (!string_desc || (string_desc->common.type != ACPI_TYPE_STRING)) { | |
83 | return_ACPI_STATUS (AE_TYPE); | |
84 | } | |
85 | ||
86 | /* Create a return object (Default value = 0) */ | |
87 | ||
88 | return_desc = acpi_ut_create_internal_object (ACPI_TYPE_INTEGER); | |
89 | if (!return_desc) { | |
90 | return_ACPI_STATUS (AE_NO_MEMORY); | |
91 | } | |
92 | ||
93 | /* Compare input string to table of supported strings */ | |
94 | ||
95 | for (i = 0; i < ACPI_NUM_OSI_STRINGS; i++) { | |
96 | if (!ACPI_STRCMP (string_desc->string.pointer, | |
97 | (char *) acpi_gbl_valid_osi_strings[i])) { | |
98 | /* This string is supported */ | |
99 | ||
100 | return_desc->integer.value = 0xFFFFFFFF; | |
101 | break; | |
102 | } | |
103 | } | |
104 | ||
105 | walk_state->return_desc = return_desc; | |
106 | return_ACPI_STATUS (AE_CTRL_TERMINATE); | |
107 | } | |
108 | ||
109 | ||
110 | /******************************************************************************* | |
111 | * | |
112 | * FUNCTION: acpi_ut_evaluate_object | |
113 | * | |
114 | * PARAMETERS: prefix_node - Starting node | |
115 | * Path - Path to object from starting node | |
116 | * expected_return_types - Bitmap of allowed return types | |
117 | * return_desc - Where a return value is stored | |
118 | * | |
119 | * RETURN: Status | |
120 | * | |
121 | * DESCRIPTION: Evaluates a namespace object and verifies the type of the | |
122 | * return object. Common code that simplifies accessing objects | |
123 | * that have required return objects of fixed types. | |
124 | * | |
125 | * NOTE: Internal function, no parameter validation | |
126 | * | |
127 | ******************************************************************************/ | |
128 | ||
129 | acpi_status | |
130 | acpi_ut_evaluate_object ( | |
131 | struct acpi_namespace_node *prefix_node, | |
132 | char *path, | |
133 | u32 expected_return_btypes, | |
134 | union acpi_operand_object **return_desc) | |
135 | { | |
136 | struct acpi_parameter_info info; | |
137 | acpi_status status; | |
138 | u32 return_btype; | |
139 | ||
140 | ||
141 | ACPI_FUNCTION_TRACE ("ut_evaluate_object"); | |
142 | ||
143 | ||
144 | info.node = prefix_node; | |
145 | info.parameters = NULL; | |
146 | info.parameter_type = ACPI_PARAM_ARGS; | |
147 | ||
148 | /* Evaluate the object/method */ | |
149 | ||
150 | status = acpi_ns_evaluate_relative (path, &info); | |
151 | if (ACPI_FAILURE (status)) { | |
152 | if (status == AE_NOT_FOUND) { | |
153 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "[%4.4s.%s] was not found\n", | |
154 | acpi_ut_get_node_name (prefix_node), path)); | |
155 | } | |
156 | else { | |
157 | ACPI_REPORT_METHOD_ERROR ("Method execution failed", | |
158 | prefix_node, path, status); | |
159 | } | |
160 | ||
161 | return_ACPI_STATUS (status); | |
162 | } | |
163 | ||
164 | /* Did we get a return object? */ | |
165 | ||
166 | if (!info.return_object) { | |
167 | if (expected_return_btypes) { | |
168 | ACPI_REPORT_METHOD_ERROR ("No object was returned from", | |
169 | prefix_node, path, AE_NOT_EXIST); | |
170 | ||
171 | return_ACPI_STATUS (AE_NOT_EXIST); | |
172 | } | |
173 | ||
174 | return_ACPI_STATUS (AE_OK); | |
175 | } | |
176 | ||
177 | /* Map the return object type to the bitmapped type */ | |
178 | ||
179 | switch (ACPI_GET_OBJECT_TYPE (info.return_object)) { | |
180 | case ACPI_TYPE_INTEGER: | |
181 | return_btype = ACPI_BTYPE_INTEGER; | |
182 | break; | |
183 | ||
184 | case ACPI_TYPE_BUFFER: | |
185 | return_btype = ACPI_BTYPE_BUFFER; | |
186 | break; | |
187 | ||
188 | case ACPI_TYPE_STRING: | |
189 | return_btype = ACPI_BTYPE_STRING; | |
190 | break; | |
191 | ||
192 | case ACPI_TYPE_PACKAGE: | |
193 | return_btype = ACPI_BTYPE_PACKAGE; | |
194 | break; | |
195 | ||
196 | default: | |
197 | return_btype = 0; | |
198 | break; | |
199 | } | |
200 | ||
201 | if ((acpi_gbl_enable_interpreter_slack) && | |
202 | (!expected_return_btypes)) { | |
203 | /* | |
204 | * We received a return object, but one was not expected. This can | |
205 | * happen frequently if the "implicit return" feature is enabled. | |
206 | * Just delete the return object and return AE_OK. | |
207 | */ | |
208 | acpi_ut_remove_reference (info.return_object); | |
209 | return_ACPI_STATUS (AE_OK); | |
210 | } | |
211 | ||
212 | /* Is the return object one of the expected types? */ | |
213 | ||
214 | if (!(expected_return_btypes & return_btype)) { | |
215 | ACPI_REPORT_METHOD_ERROR ("Return object type is incorrect", | |
216 | prefix_node, path, AE_TYPE); | |
217 | ||
218 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
219 | "Type returned from %s was incorrect: %s, expected Btypes: %X\n", | |
220 | path, acpi_ut_get_object_type_name (info.return_object), | |
221 | expected_return_btypes)); | |
222 | ||
223 | /* On error exit, we must delete the return object */ | |
224 | ||
225 | acpi_ut_remove_reference (info.return_object); | |
226 | return_ACPI_STATUS (AE_TYPE); | |
227 | } | |
228 | ||
229 | /* Object type is OK, return it */ | |
230 | ||
231 | *return_desc = info.return_object; | |
232 | return_ACPI_STATUS (AE_OK); | |
233 | } | |
234 | ||
235 | ||
236 | /******************************************************************************* | |
237 | * | |
238 | * FUNCTION: acpi_ut_evaluate_numeric_object | |
239 | * | |
240 | * PARAMETERS: *object_name - Object name to be evaluated | |
241 | * device_node - Node for the device | |
242 | * *Address - Where the value is returned | |
243 | * | |
244 | * RETURN: Status | |
245 | * | |
246 | * DESCRIPTION: Evaluates a numeric namespace object for a selected device | |
247 | * and stores result in *Address. | |
248 | * | |
249 | * NOTE: Internal function, no parameter validation | |
250 | * | |
251 | ******************************************************************************/ | |
252 | ||
253 | acpi_status | |
254 | acpi_ut_evaluate_numeric_object ( | |
255 | char *object_name, | |
256 | struct acpi_namespace_node *device_node, | |
257 | acpi_integer *address) | |
258 | { | |
259 | union acpi_operand_object *obj_desc; | |
260 | acpi_status status; | |
261 | ||
262 | ||
263 | ACPI_FUNCTION_TRACE ("ut_evaluate_numeric_object"); | |
264 | ||
265 | ||
266 | status = acpi_ut_evaluate_object (device_node, object_name, | |
267 | ACPI_BTYPE_INTEGER, &obj_desc); | |
268 | if (ACPI_FAILURE (status)) { | |
269 | return_ACPI_STATUS (status); | |
270 | } | |
271 | ||
272 | /* Get the returned Integer */ | |
273 | ||
274 | *address = obj_desc->integer.value; | |
275 | ||
276 | /* On exit, we must delete the return object */ | |
277 | ||
278 | acpi_ut_remove_reference (obj_desc); | |
279 | return_ACPI_STATUS (status); | |
280 | } | |
281 | ||
282 | ||
283 | /******************************************************************************* | |
284 | * | |
285 | * FUNCTION: acpi_ut_copy_id_string | |
286 | * | |
287 | * PARAMETERS: Destination - Where to copy the string | |
288 | * Source - Source string | |
289 | * max_length - Length of the destination buffer | |
290 | * | |
291 | * RETURN: None | |
292 | * | |
293 | * DESCRIPTION: Copies an ID string for the _HID, _CID, and _UID methods. | |
294 | * Performs removal of a leading asterisk if present -- workaround | |
295 | * for a known issue on a bunch of machines. | |
296 | * | |
297 | ******************************************************************************/ | |
298 | ||
299 | static void | |
300 | acpi_ut_copy_id_string ( | |
301 | char *destination, | |
302 | char *source, | |
303 | acpi_size max_length) | |
304 | { | |
305 | ||
306 | ||
307 | /* | |
308 | * Workaround for ID strings that have a leading asterisk. This construct | |
309 | * is not allowed by the ACPI specification (ID strings must be | |
310 | * alphanumeric), but enough existing machines have this embedded in their | |
311 | * ID strings that the following code is useful. | |
312 | */ | |
313 | if (*source == '*') { | |
314 | source++; | |
315 | } | |
316 | ||
317 | /* Do the actual copy */ | |
318 | ||
319 | ACPI_STRNCPY (destination, source, max_length); | |
320 | } | |
321 | ||
322 | ||
323 | /******************************************************************************* | |
324 | * | |
325 | * FUNCTION: acpi_ut_execute_HID | |
326 | * | |
327 | * PARAMETERS: device_node - Node for the device | |
328 | * *Hid - Where the HID is returned | |
329 | * | |
330 | * RETURN: Status | |
331 | * | |
332 | * DESCRIPTION: Executes the _HID control method that returns the hardware | |
333 | * ID of the device. | |
334 | * | |
335 | * NOTE: Internal function, no parameter validation | |
336 | * | |
337 | ******************************************************************************/ | |
338 | ||
339 | acpi_status | |
340 | acpi_ut_execute_HID ( | |
341 | struct acpi_namespace_node *device_node, | |
342 | struct acpi_device_id *hid) | |
343 | { | |
344 | union acpi_operand_object *obj_desc; | |
345 | acpi_status status; | |
346 | ||
347 | ||
348 | ACPI_FUNCTION_TRACE ("ut_execute_HID"); | |
349 | ||
350 | ||
351 | status = acpi_ut_evaluate_object (device_node, METHOD_NAME__HID, | |
352 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc); | |
353 | if (ACPI_FAILURE (status)) { | |
354 | return_ACPI_STATUS (status); | |
355 | } | |
356 | ||
357 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) { | |
358 | /* Convert the Numeric HID to string */ | |
359 | ||
360 | acpi_ex_eisa_id_to_string ((u32) obj_desc->integer.value, hid->value); | |
361 | } | |
362 | else { | |
363 | /* Copy the String HID from the returned object */ | |
364 | ||
365 | acpi_ut_copy_id_string (hid->value, obj_desc->string.pointer, | |
366 | sizeof (hid->value)); | |
367 | } | |
368 | ||
369 | /* On exit, we must delete the return object */ | |
370 | ||
371 | acpi_ut_remove_reference (obj_desc); | |
372 | return_ACPI_STATUS (status); | |
373 | } | |
374 | ||
375 | ||
376 | /******************************************************************************* | |
377 | * | |
378 | * FUNCTION: acpi_ut_translate_one_cid | |
379 | * | |
380 | * PARAMETERS: obj_desc - _CID object, must be integer or string | |
381 | * one_cid - Where the CID string is returned | |
382 | * | |
383 | * RETURN: Status | |
384 | * | |
385 | * DESCRIPTION: Return a numeric or string _CID value as a string. | |
386 | * (Compatible ID) | |
387 | * | |
388 | * NOTE: Assumes a maximum _CID string length of | |
389 | * ACPI_MAX_CID_LENGTH. | |
390 | * | |
391 | ******************************************************************************/ | |
392 | ||
393 | static acpi_status | |
394 | acpi_ut_translate_one_cid ( | |
395 | union acpi_operand_object *obj_desc, | |
396 | struct acpi_compatible_id *one_cid) | |
397 | { | |
398 | ||
399 | ||
400 | switch (ACPI_GET_OBJECT_TYPE (obj_desc)) { | |
401 | case ACPI_TYPE_INTEGER: | |
402 | ||
403 | /* Convert the Numeric CID to string */ | |
404 | ||
405 | acpi_ex_eisa_id_to_string ((u32) obj_desc->integer.value, one_cid->value); | |
406 | return (AE_OK); | |
407 | ||
408 | case ACPI_TYPE_STRING: | |
409 | ||
410 | if (obj_desc->string.length > ACPI_MAX_CID_LENGTH) { | |
411 | return (AE_AML_STRING_LIMIT); | |
412 | } | |
413 | ||
414 | /* Copy the String CID from the returned object */ | |
415 | ||
416 | acpi_ut_copy_id_string (one_cid->value, obj_desc->string.pointer, | |
417 | ACPI_MAX_CID_LENGTH); | |
418 | return (AE_OK); | |
419 | ||
420 | default: | |
421 | ||
422 | return (AE_TYPE); | |
423 | } | |
424 | } | |
425 | ||
426 | ||
427 | /******************************************************************************* | |
428 | * | |
429 | * FUNCTION: acpi_ut_execute_CID | |
430 | * | |
431 | * PARAMETERS: device_node - Node for the device | |
432 | * *Cid - Where the CID is returned | |
433 | * | |
434 | * RETURN: Status | |
435 | * | |
436 | * DESCRIPTION: Executes the _CID control method that returns one or more | |
437 | * compatible hardware IDs for the device. | |
438 | * | |
439 | * NOTE: Internal function, no parameter validation | |
440 | * | |
441 | ******************************************************************************/ | |
442 | ||
443 | acpi_status | |
444 | acpi_ut_execute_CID ( | |
445 | struct acpi_namespace_node *device_node, | |
446 | struct acpi_compatible_id_list **return_cid_list) | |
447 | { | |
448 | union acpi_operand_object *obj_desc; | |
449 | acpi_status status; | |
450 | u32 count; | |
451 | u32 size; | |
452 | struct acpi_compatible_id_list *cid_list; | |
453 | acpi_native_uint i; | |
454 | ||
455 | ||
456 | ACPI_FUNCTION_TRACE ("ut_execute_CID"); | |
457 | ||
458 | ||
459 | /* Evaluate the _CID method for this device */ | |
460 | ||
461 | status = acpi_ut_evaluate_object (device_node, METHOD_NAME__CID, | |
462 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING | ACPI_BTYPE_PACKAGE, | |
463 | &obj_desc); | |
464 | if (ACPI_FAILURE (status)) { | |
465 | return_ACPI_STATUS (status); | |
466 | } | |
467 | ||
468 | /* Get the number of _CIDs returned */ | |
469 | ||
470 | count = 1; | |
471 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_PACKAGE) { | |
472 | count = obj_desc->package.count; | |
473 | } | |
474 | ||
475 | /* Allocate a worst-case buffer for the _CIDs */ | |
476 | ||
477 | size = (((count - 1) * sizeof (struct acpi_compatible_id)) + | |
478 | sizeof (struct acpi_compatible_id_list)); | |
479 | ||
480 | cid_list = ACPI_MEM_CALLOCATE ((acpi_size) size); | |
481 | if (!cid_list) { | |
482 | return_ACPI_STATUS (AE_NO_MEMORY); | |
483 | } | |
484 | ||
485 | /* Init CID list */ | |
486 | ||
487 | cid_list->count = count; | |
488 | cid_list->size = size; | |
489 | ||
490 | /* | |
491 | * A _CID can return either a single compatible ID or a package of compatible | |
492 | * IDs. Each compatible ID can be one of the following: | |
493 | * -- Number (32 bit compressed EISA ID) or | |
494 | * -- String (PCI ID format, e.g. "PCI\VEN_vvvv&DEV_dddd&SUBSYS_ssssssss"). | |
495 | */ | |
496 | ||
497 | /* The _CID object can be either a single CID or a package (list) of CIDs */ | |
498 | ||
499 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_PACKAGE) { | |
500 | /* Translate each package element */ | |
501 | ||
502 | for (i = 0; i < count; i++) { | |
503 | status = acpi_ut_translate_one_cid (obj_desc->package.elements[i], | |
504 | &cid_list->id[i]); | |
505 | if (ACPI_FAILURE (status)) { | |
506 | break; | |
507 | } | |
508 | } | |
509 | } | |
510 | else { | |
511 | /* Only one CID, translate to a string */ | |
512 | ||
513 | status = acpi_ut_translate_one_cid (obj_desc, cid_list->id); | |
514 | } | |
515 | ||
516 | /* Cleanup on error */ | |
517 | ||
518 | if (ACPI_FAILURE (status)) { | |
519 | ACPI_MEM_FREE (cid_list); | |
520 | } | |
521 | else { | |
522 | *return_cid_list = cid_list; | |
523 | } | |
524 | ||
525 | /* On exit, we must delete the _CID return object */ | |
526 | ||
527 | acpi_ut_remove_reference (obj_desc); | |
528 | return_ACPI_STATUS (status); | |
529 | } | |
530 | ||
531 | ||
532 | /******************************************************************************* | |
533 | * | |
534 | * FUNCTION: acpi_ut_execute_UID | |
535 | * | |
536 | * PARAMETERS: device_node - Node for the device | |
537 | * *Uid - Where the UID is returned | |
538 | * | |
539 | * RETURN: Status | |
540 | * | |
541 | * DESCRIPTION: Executes the _UID control method that returns the hardware | |
542 | * ID of the device. | |
543 | * | |
544 | * NOTE: Internal function, no parameter validation | |
545 | * | |
546 | ******************************************************************************/ | |
547 | ||
548 | acpi_status | |
549 | acpi_ut_execute_UID ( | |
550 | struct acpi_namespace_node *device_node, | |
551 | struct acpi_device_id *uid) | |
552 | { | |
553 | union acpi_operand_object *obj_desc; | |
554 | acpi_status status; | |
555 | ||
556 | ||
557 | ACPI_FUNCTION_TRACE ("ut_execute_UID"); | |
558 | ||
559 | ||
560 | status = acpi_ut_evaluate_object (device_node, METHOD_NAME__UID, | |
561 | ACPI_BTYPE_INTEGER | ACPI_BTYPE_STRING, &obj_desc); | |
562 | if (ACPI_FAILURE (status)) { | |
563 | return_ACPI_STATUS (status); | |
564 | } | |
565 | ||
566 | if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) { | |
567 | /* Convert the Numeric UID to string */ | |
568 | ||
569 | acpi_ex_unsigned_integer_to_string (obj_desc->integer.value, uid->value); | |
570 | } | |
571 | else { | |
572 | /* Copy the String UID from the returned object */ | |
573 | ||
574 | acpi_ut_copy_id_string (uid->value, obj_desc->string.pointer, | |
575 | sizeof (uid->value)); | |
576 | } | |
577 | ||
578 | /* On exit, we must delete the return object */ | |
579 | ||
580 | acpi_ut_remove_reference (obj_desc); | |
581 | return_ACPI_STATUS (status); | |
582 | } | |
583 | ||
584 | ||
585 | /******************************************************************************* | |
586 | * | |
587 | * FUNCTION: acpi_ut_execute_STA | |
588 | * | |
589 | * PARAMETERS: device_node - Node for the device | |
590 | * *Flags - Where the status flags are returned | |
591 | * | |
592 | * RETURN: Status | |
593 | * | |
594 | * DESCRIPTION: Executes _STA for selected device and stores results in | |
595 | * *Flags. | |
596 | * | |
597 | * NOTE: Internal function, no parameter validation | |
598 | * | |
599 | ******************************************************************************/ | |
600 | ||
601 | acpi_status | |
602 | acpi_ut_execute_STA ( | |
603 | struct acpi_namespace_node *device_node, | |
604 | u32 *flags) | |
605 | { | |
606 | union acpi_operand_object *obj_desc; | |
607 | acpi_status status; | |
608 | ||
609 | ||
610 | ACPI_FUNCTION_TRACE ("ut_execute_STA"); | |
611 | ||
612 | ||
613 | status = acpi_ut_evaluate_object (device_node, METHOD_NAME__STA, | |
614 | ACPI_BTYPE_INTEGER, &obj_desc); | |
615 | if (ACPI_FAILURE (status)) { | |
616 | if (AE_NOT_FOUND == status) { | |
617 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, | |
618 | "_STA on %4.4s was not found, assuming device is present\n", | |
619 | acpi_ut_get_node_name (device_node))); | |
620 | ||
621 | *flags = 0x0F; | |
622 | status = AE_OK; | |
623 | } | |
624 | ||
625 | return_ACPI_STATUS (status); | |
626 | } | |
627 | ||
628 | /* Extract the status flags */ | |
629 | ||
630 | *flags = (u32) obj_desc->integer.value; | |
631 | ||
632 | /* On exit, we must delete the return object */ | |
633 | ||
634 | acpi_ut_remove_reference (obj_desc); | |
635 | return_ACPI_STATUS (status); | |
636 | } | |
637 | ||
638 | ||
639 | /******************************************************************************* | |
640 | * | |
641 | * FUNCTION: acpi_ut_execute_Sxds | |
642 | * | |
643 | * PARAMETERS: device_node - Node for the device | |
644 | * *Flags - Where the status flags are returned | |
645 | * | |
646 | * RETURN: Status | |
647 | * | |
648 | * DESCRIPTION: Executes _STA for selected device and stores results in | |
649 | * *Flags. | |
650 | * | |
651 | * NOTE: Internal function, no parameter validation | |
652 | * | |
653 | ******************************************************************************/ | |
654 | ||
655 | acpi_status | |
656 | acpi_ut_execute_sxds ( | |
657 | struct acpi_namespace_node *device_node, | |
658 | u8 *highest) | |
659 | { | |
660 | union acpi_operand_object *obj_desc; | |
661 | acpi_status status; | |
662 | u32 i; | |
663 | ||
664 | ||
665 | ACPI_FUNCTION_TRACE ("ut_execute_Sxds"); | |
666 | ||
667 | ||
668 | for (i = 0; i < 4; i++) { | |
669 | highest[i] = 0xFF; | |
670 | status = acpi_ut_evaluate_object (device_node, | |
671 | (char *) acpi_gbl_highest_dstate_names[i], | |
672 | ACPI_BTYPE_INTEGER, &obj_desc); | |
673 | if (ACPI_FAILURE (status)) { | |
674 | if (status != AE_NOT_FOUND) { | |
675 | ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, | |
676 | "%s on Device %4.4s, %s\n", | |
677 | (char *) acpi_gbl_highest_dstate_names[i], | |
678 | acpi_ut_get_node_name (device_node), | |
679 | acpi_format_exception (status))); | |
680 | ||
681 | return_ACPI_STATUS (status); | |
682 | } | |
683 | } | |
684 | else { | |
685 | /* Extract the Dstate value */ | |
686 | ||
687 | highest[i] = (u8) obj_desc->integer.value; | |
688 | ||
689 | /* Delete the return object */ | |
690 | ||
691 | acpi_ut_remove_reference (obj_desc); | |
692 | } | |
693 | } | |
694 | ||
695 | return_ACPI_STATUS (AE_OK); | |
696 | } |