1 /******************************************************************************
2 *
3 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
4 * parents and siblings and Scope manipulation
5 *
6 *****************************************************************************/
7
8 /*
9 * Copyright (C) 2000 - 2004, R. Byron Moore
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
45
46 #include <acpi/acpi.h>
47 #include <acpi/acnamesp.h>
48 #include <acpi/amlcode.h>
49 #include <acpi/actables.h>
50
51 #define _COMPONENT ACPI_NAMESPACE
52 ACPI_MODULE_NAME ("nsutils")
53
54
55 /*******************************************************************************
56 *
57 * FUNCTION: acpi_ns_report_error
58 *
59 * PARAMETERS: module_name - Caller's module name (for error output)
60 * line_number - Caller's line number (for error output)
61 * component_id - Caller's component ID (for error output)
62 * Message - Error message to use on failure
63 *
64 * RETURN: None
65 *
66 * DESCRIPTION: Print warning message with full pathname
67 *
68 ******************************************************************************/
69
70 void
acpi_ns_report_error(char * module_name,u32 line_number,u32 component_id,char * internal_name,acpi_status lookup_status)71 acpi_ns_report_error (
72 char *module_name,
73 u32 line_number,
74 u32 component_id,
75 char *internal_name,
76 acpi_status lookup_status)
77 {
78 acpi_status status;
79 char *name = NULL;
80
81
82 acpi_os_printf ("%8s-%04d: *** Error: Looking up ",
83 module_name, line_number);
84
85 if (lookup_status == AE_BAD_CHARACTER) {
86 /* There is a non-ascii character in the name */
87
88 acpi_os_printf ("[0x%4.4X] (NON-ASCII)\n", *(ACPI_CAST_PTR (u32, internal_name)));
89 }
90 else {
91 /* Convert path to external format */
92
93 status = acpi_ns_externalize_name (ACPI_UINT32_MAX, internal_name, NULL, &name);
94
95 /* Print target name */
96
97 if (ACPI_SUCCESS (status)) {
98 acpi_os_printf ("[%s]", name);
99 }
100 else {
101 acpi_os_printf ("[COULD NOT EXTERNALIZE NAME]");
102 }
103
104 if (name) {
105 ACPI_MEM_FREE (name);
106 }
107 }
108
109 acpi_os_printf (" in namespace, %s\n",
110 acpi_format_exception (lookup_status));
111 }
112
113
114 /*******************************************************************************
115 *
116 * FUNCTION: acpi_ns_report_method_error
117 *
118 * PARAMETERS: module_name - Caller's module name (for error output)
119 * line_number - Caller's line number (for error output)
120 * component_id - Caller's component ID (for error output)
121 * Message - Error message to use on failure
122 *
123 * RETURN: None
124 *
125 * DESCRIPTION: Print warning message with full pathname
126 *
127 ******************************************************************************/
128
129 void
acpi_ns_report_method_error(char * module_name,u32 line_number,u32 component_id,char * message,struct acpi_namespace_node * prefix_node,char * path,acpi_status method_status)130 acpi_ns_report_method_error (
131 char *module_name,
132 u32 line_number,
133 u32 component_id,
134 char *message,
135 struct acpi_namespace_node *prefix_node,
136 char *path,
137 acpi_status method_status)
138 {
139 acpi_status status;
140 struct acpi_namespace_node *node = prefix_node;
141
142
143 if (path) {
144 status = acpi_ns_get_node_by_path (path, prefix_node, ACPI_NS_NO_UPSEARCH, &node);
145 if (ACPI_FAILURE (status)) {
146 acpi_os_printf ("report_method_error: Could not get node\n");
147 return;
148 }
149 }
150
151 acpi_os_printf ("%8s-%04d: *** Error: ", module_name, line_number);
152 acpi_ns_print_node_pathname (node, message);
153 acpi_os_printf (", %s\n", acpi_format_exception (method_status));
154 }
155
156
157 /*******************************************************************************
158 *
159 * FUNCTION: acpi_ns_print_node_pathname
160 *
161 * PARAMETERS: Node - Object
162 * Msg - Prefix message
163 *
164 * DESCRIPTION: Print an object's full namespace pathname
165 * Manages allocation/freeing of a pathname buffer
166 *
167 ******************************************************************************/
168
169 void
acpi_ns_print_node_pathname(struct acpi_namespace_node * node,char * msg)170 acpi_ns_print_node_pathname (
171 struct acpi_namespace_node *node,
172 char *msg)
173 {
174 struct acpi_buffer buffer;
175 acpi_status status;
176
177
178 if (!node) {
179 acpi_os_printf ("[NULL NAME]");
180 return;
181 }
182
183 /* Convert handle to a full pathname and print it (with supplied message) */
184
185 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
186
187 status = acpi_ns_handle_to_pathname (node, &buffer);
188 if (ACPI_SUCCESS (status)) {
189 if (msg) {
190 acpi_os_printf ("%s ", msg);
191 }
192
193 acpi_os_printf ("[%s] (Node %p)", (char *) buffer.pointer, node);
194 ACPI_MEM_FREE (buffer.pointer);
195 }
196 }
197
198
199 /*******************************************************************************
200 *
201 * FUNCTION: acpi_ns_valid_root_prefix
202 *
203 * PARAMETERS: Prefix - Character to be checked
204 *
205 * RETURN: TRUE if a valid prefix
206 *
207 * DESCRIPTION: Check if a character is a valid ACPI Root prefix
208 *
209 ******************************************************************************/
210
211 u8
acpi_ns_valid_root_prefix(char prefix)212 acpi_ns_valid_root_prefix (
213 char prefix)
214 {
215
216 return ((u8) (prefix == '\\'));
217 }
218
219
220 /*******************************************************************************
221 *
222 * FUNCTION: acpi_ns_valid_path_separator
223 *
224 * PARAMETERS: Sep - Character to be checked
225 *
226 * RETURN: TRUE if a valid path separator
227 *
228 * DESCRIPTION: Check if a character is a valid ACPI path separator
229 *
230 ******************************************************************************/
231
232 u8
acpi_ns_valid_path_separator(char sep)233 acpi_ns_valid_path_separator (
234 char sep)
235 {
236
237 return ((u8) (sep == '.'));
238 }
239
240
241 /*******************************************************************************
242 *
243 * FUNCTION: acpi_ns_get_type
244 *
245 * PARAMETERS: Handle - Parent Node to be examined
246 *
247 * RETURN: Type field from Node whose handle is passed
248 *
249 ******************************************************************************/
250
251 acpi_object_type
acpi_ns_get_type(struct acpi_namespace_node * node)252 acpi_ns_get_type (
253 struct acpi_namespace_node *node)
254 {
255 ACPI_FUNCTION_TRACE ("ns_get_type");
256
257
258 if (!node) {
259 ACPI_REPORT_WARNING (("ns_get_type: Null Node input pointer\n"));
260 return_VALUE (ACPI_TYPE_ANY);
261 }
262
263 return_VALUE ((acpi_object_type) node->type);
264 }
265
266
267 /*******************************************************************************
268 *
269 * FUNCTION: acpi_ns_local
270 *
271 * PARAMETERS: Type - A namespace object type
272 *
273 * RETURN: LOCAL if names must be found locally in objects of the
274 * passed type, 0 if enclosing scopes should be searched
275 *
276 ******************************************************************************/
277
278 u32
acpi_ns_local(acpi_object_type type)279 acpi_ns_local (
280 acpi_object_type type)
281 {
282 ACPI_FUNCTION_TRACE ("ns_local");
283
284
285 if (!acpi_ut_valid_object_type (type)) {
286 /* Type code out of range */
287
288 ACPI_REPORT_WARNING (("ns_local: Invalid Object Type\n"));
289 return_VALUE (ACPI_NS_NORMAL);
290 }
291
292 return_VALUE ((u32) acpi_gbl_ns_properties[type] & ACPI_NS_LOCAL);
293 }
294
295
296 /*******************************************************************************
297 *
298 * FUNCTION: acpi_ns_get_internal_name_length
299 *
300 * PARAMETERS: Info - Info struct initialized with the
301 * external name pointer.
302 *
303 * RETURN: Status
304 *
305 * DESCRIPTION: Calculate the length of the internal (AML) namestring
306 * corresponding to the external (ASL) namestring.
307 *
308 ******************************************************************************/
309
310 void
acpi_ns_get_internal_name_length(struct acpi_namestring_info * info)311 acpi_ns_get_internal_name_length (
312 struct acpi_namestring_info *info)
313 {
314 char *next_external_char;
315 u32 i;
316
317
318 ACPI_FUNCTION_ENTRY ();
319
320
321 next_external_char = info->external_name;
322 info->num_carats = 0;
323 info->num_segments = 0;
324 info->fully_qualified = FALSE;
325
326 /*
327 * For the internal name, the required length is 4 bytes
328 * per segment, plus 1 each for root_prefix, multi_name_prefix_op,
329 * segment count, trailing null (which is not really needed,
330 * but no there's harm in putting it there)
331 *
332 * strlen() + 1 covers the first name_seg, which has no
333 * path separator
334 */
335 if (acpi_ns_valid_root_prefix (next_external_char[0])) {
336 info->fully_qualified = TRUE;
337 next_external_char++;
338 }
339 else {
340 /*
341 * Handle Carat prefixes
342 */
343 while (*next_external_char == '^') {
344 info->num_carats++;
345 next_external_char++;
346 }
347 }
348
349 /*
350 * Determine the number of ACPI name "segments" by counting
351 * the number of path separators within the string. Start
352 * with one segment since the segment count is (# separators)
353 * + 1, and zero separators is ok.
354 */
355 if (*next_external_char) {
356 info->num_segments = 1;
357 for (i = 0; next_external_char[i]; i++) {
358 if (acpi_ns_valid_path_separator (next_external_char[i])) {
359 info->num_segments++;
360 }
361 }
362 }
363
364 info->length = (ACPI_NAME_SIZE * info->num_segments) +
365 4 + info->num_carats;
366
367 info->next_external_char = next_external_char;
368 }
369
370
371 /*******************************************************************************
372 *
373 * FUNCTION: acpi_ns_build_internal_name
374 *
375 * PARAMETERS: Info - Info struct fully initialized
376 *
377 * RETURN: Status
378 *
379 * DESCRIPTION: Construct the internal (AML) namestring
380 * corresponding to the external (ASL) namestring.
381 *
382 ******************************************************************************/
383
384 acpi_status
acpi_ns_build_internal_name(struct acpi_namestring_info * info)385 acpi_ns_build_internal_name (
386 struct acpi_namestring_info *info)
387 {
388 u32 num_segments = info->num_segments;
389 char *internal_name = info->internal_name;
390 char *external_name = info->next_external_char;
391 char *result = NULL;
392 acpi_native_uint i;
393
394
395 ACPI_FUNCTION_TRACE ("ns_build_internal_name");
396
397
398 /* Setup the correct prefixes, counts, and pointers */
399
400 if (info->fully_qualified) {
401 internal_name[0] = '\\';
402
403 if (num_segments <= 1) {
404 result = &internal_name[1];
405 }
406 else if (num_segments == 2) {
407 internal_name[1] = AML_DUAL_NAME_PREFIX;
408 result = &internal_name[2];
409 }
410 else {
411 internal_name[1] = AML_MULTI_NAME_PREFIX_OP;
412 internal_name[2] = (char) num_segments;
413 result = &internal_name[3];
414 }
415 }
416 else {
417 /*
418 * Not fully qualified.
419 * Handle Carats first, then append the name segments
420 */
421 i = 0;
422 if (info->num_carats) {
423 for (i = 0; i < info->num_carats; i++) {
424 internal_name[i] = '^';
425 }
426 }
427
428 if (num_segments <= 1) {
429 result = &internal_name[i];
430 }
431 else if (num_segments == 2) {
432 internal_name[i] = AML_DUAL_NAME_PREFIX;
433 result = &internal_name[(acpi_native_uint) (i+1)];
434 }
435 else {
436 internal_name[i] = AML_MULTI_NAME_PREFIX_OP;
437 internal_name[(acpi_native_uint) (i+1)] = (char) num_segments;
438 result = &internal_name[(acpi_native_uint) (i+2)];
439 }
440 }
441
442 /* Build the name (minus path separators) */
443
444 for (; num_segments; num_segments--) {
445 for (i = 0; i < ACPI_NAME_SIZE; i++) {
446 if (acpi_ns_valid_path_separator (*external_name) ||
447 (*external_name == 0)) {
448 /* Pad the segment with underscore(s) if segment is short */
449
450 result[i] = '_';
451 }
452 else {
453 /* Convert the character to uppercase and save it */
454
455 result[i] = (char) ACPI_TOUPPER ((int) *external_name);
456 external_name++;
457 }
458 }
459
460 /* Now we must have a path separator, or the pathname is bad */
461
462 if (!acpi_ns_valid_path_separator (*external_name) &&
463 (*external_name != 0)) {
464 return_ACPI_STATUS (AE_BAD_PARAMETER);
465 }
466
467 /* Move on the next segment */
468
469 external_name++;
470 result += ACPI_NAME_SIZE;
471 }
472
473 /* Terminate the string */
474
475 *result = 0;
476
477 if (info->fully_qualified) {
478 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (abs) \"\\%s\"\n",
479 internal_name, internal_name));
480 }
481 else {
482 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Returning [%p] (rel) \"%s\"\n",
483 internal_name, internal_name));
484 }
485
486 return_ACPI_STATUS (AE_OK);
487 }
488
489
490 /*******************************************************************************
491 *
492 * FUNCTION: acpi_ns_internalize_name
493 *
494 * PARAMETERS: *external_name - External representation of name
495 * **Converted Name - Where to return the resulting
496 * internal represention of the name
497 *
498 * RETURN: Status
499 *
500 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
501 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
502 *
503 *******************************************************************************/
504
505 acpi_status
acpi_ns_internalize_name(char * external_name,char ** converted_name)506 acpi_ns_internalize_name (
507 char *external_name,
508 char **converted_name)
509 {
510 char *internal_name;
511 struct acpi_namestring_info info;
512 acpi_status status;
513
514
515 ACPI_FUNCTION_TRACE ("ns_internalize_name");
516
517
518 if ((!external_name) ||
519 (*external_name == 0) ||
520 (!converted_name)) {
521 return_ACPI_STATUS (AE_BAD_PARAMETER);
522 }
523
524 /* Get the length of the new internal name */
525
526 info.external_name = external_name;
527 acpi_ns_get_internal_name_length (&info);
528
529 /* We need a segment to store the internal name */
530
531 internal_name = ACPI_MEM_CALLOCATE (info.length);
532 if (!internal_name) {
533 return_ACPI_STATUS (AE_NO_MEMORY);
534 }
535
536 /* Build the name */
537
538 info.internal_name = internal_name;
539 status = acpi_ns_build_internal_name (&info);
540 if (ACPI_FAILURE (status)) {
541 ACPI_MEM_FREE (internal_name);
542 return_ACPI_STATUS (status);
543 }
544
545 *converted_name = internal_name;
546 return_ACPI_STATUS (AE_OK);
547 }
548
549
550 /*******************************************************************************
551 *
552 * FUNCTION: acpi_ns_externalize_name
553 *
554 * PARAMETERS: *internal_name - Internal representation of name
555 * **converted_name - Where to return the resulting
556 * external representation of name
557 *
558 * RETURN: Status
559 *
560 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
561 * to its external form (e.g. "\_PR_.CPU0")
562 *
563 ******************************************************************************/
564
565 acpi_status
acpi_ns_externalize_name(u32 internal_name_length,char * internal_name,u32 * converted_name_length,char ** converted_name)566 acpi_ns_externalize_name (
567 u32 internal_name_length,
568 char *internal_name,
569 u32 *converted_name_length,
570 char **converted_name)
571 {
572 acpi_native_uint names_index = 0;
573 acpi_native_uint num_segments = 0;
574 acpi_native_uint required_length;
575 acpi_native_uint prefix_length = 0;
576 acpi_native_uint i = 0;
577 acpi_native_uint j = 0;
578
579
580 ACPI_FUNCTION_TRACE ("ns_externalize_name");
581
582
583 if (!internal_name_length ||
584 !internal_name ||
585 !converted_name) {
586 return_ACPI_STATUS (AE_BAD_PARAMETER);
587 }
588
589 /*
590 * Check for a prefix (one '\' | one or more '^').
591 */
592 switch (internal_name[0]) {
593 case '\\':
594 prefix_length = 1;
595 break;
596
597 case '^':
598 for (i = 0; i < internal_name_length; i++) {
599 if (internal_name[i] == '^') {
600 prefix_length = i + 1;
601 }
602 else {
603 break;
604 }
605 }
606
607 if (i == internal_name_length) {
608 prefix_length = i;
609 }
610
611 break;
612
613 default:
614 break;
615 }
616
617 /*
618 * Check for object names. Note that there could be 0-255 of these
619 * 4-byte elements.
620 */
621 if (prefix_length < internal_name_length) {
622 switch (internal_name[prefix_length]) {
623 case AML_MULTI_NAME_PREFIX_OP:
624
625 /* <count> 4-byte names */
626
627 names_index = prefix_length + 2;
628 num_segments = (acpi_native_uint) (u8) internal_name[(acpi_native_uint) (prefix_length + 1)];
629 break;
630
631 case AML_DUAL_NAME_PREFIX:
632
633 /* Two 4-byte names */
634
635 names_index = prefix_length + 1;
636 num_segments = 2;
637 break;
638
639 case 0:
640
641 /* null_name */
642
643 names_index = 0;
644 num_segments = 0;
645 break;
646
647 default:
648
649 /* one 4-byte name */
650
651 names_index = prefix_length;
652 num_segments = 1;
653 break;
654 }
655 }
656
657 /*
658 * Calculate the length of converted_name, which equals the length
659 * of the prefix, length of all object names, length of any required
660 * punctuation ('.') between object names, plus the NULL terminator.
661 */
662 required_length = prefix_length + (4 * num_segments) +
663 ((num_segments > 0) ? (num_segments - 1) : 0) + 1;
664
665 /*
666 * Check to see if we're still in bounds. If not, there's a problem
667 * with internal_name (invalid format).
668 */
669 if (required_length > internal_name_length) {
670 ACPI_REPORT_ERROR (("ns_externalize_name: Invalid internal name\n"));
671 return_ACPI_STATUS (AE_BAD_PATHNAME);
672 }
673
674 /*
675 * Build converted_name...
676 */
677 *converted_name = ACPI_MEM_CALLOCATE (required_length);
678 if (!(*converted_name)) {
679 return_ACPI_STATUS (AE_NO_MEMORY);
680 }
681
682 j = 0;
683
684 for (i = 0; i < prefix_length; i++) {
685 (*converted_name)[j++] = internal_name[i];
686 }
687
688 if (num_segments > 0) {
689 for (i = 0; i < num_segments; i++) {
690 if (i > 0) {
691 (*converted_name)[j++] = '.';
692 }
693
694 (*converted_name)[j++] = internal_name[names_index++];
695 (*converted_name)[j++] = internal_name[names_index++];
696 (*converted_name)[j++] = internal_name[names_index++];
697 (*converted_name)[j++] = internal_name[names_index++];
698 }
699 }
700
701 if (converted_name_length) {
702 *converted_name_length = (u32) required_length;
703 }
704
705 return_ACPI_STATUS (AE_OK);
706 }
707
708
709 /*******************************************************************************
710 *
711 * FUNCTION: acpi_ns_map_handle_to_node
712 *
713 * PARAMETERS: Handle - Handle to be converted to an Node
714 *
715 * RETURN: A Name table entry pointer
716 *
717 * DESCRIPTION: Convert a namespace handle to a real Node
718 *
719 * Note: Real integer handles allow for more verification
720 * and keep all pointers within this subsystem.
721 *
722 ******************************************************************************/
723
724 struct acpi_namespace_node *
acpi_ns_map_handle_to_node(acpi_handle handle)725 acpi_ns_map_handle_to_node (
726 acpi_handle handle)
727 {
728
729 ACPI_FUNCTION_ENTRY ();
730
731
732 /*
733 * Simple implementation.
734 */
735 if (!handle) {
736 return (NULL);
737 }
738
739 if (handle == ACPI_ROOT_OBJECT) {
740 return (acpi_gbl_root_node);
741 }
742
743 /* We can at least attempt to verify the handle */
744
745 if (ACPI_GET_DESCRIPTOR_TYPE (handle) != ACPI_DESC_TYPE_NAMED) {
746 return (NULL);
747 }
748
749 return ((struct acpi_namespace_node *) handle);
750 }
751
752
753 /*******************************************************************************
754 *
755 * FUNCTION: acpi_ns_convert_entry_to_handle
756 *
757 * PARAMETERS: Node - Node to be converted to a Handle
758 *
759 * RETURN: An USER acpi_handle
760 *
761 * DESCRIPTION: Convert a real Node to a namespace handle
762 *
763 ******************************************************************************/
764
765 acpi_handle
acpi_ns_convert_entry_to_handle(struct acpi_namespace_node * node)766 acpi_ns_convert_entry_to_handle (
767 struct acpi_namespace_node *node)
768 {
769
770
771 /*
772 * Simple implementation for now;
773 */
774 return ((acpi_handle) node);
775
776
777 /* ---------------------------------------------------
778
779 if (!Node)
780 {
781 return (NULL);
782 }
783
784 if (Node == acpi_gbl_root_node)
785 {
786 return (ACPI_ROOT_OBJECT);
787 }
788
789
790 return ((acpi_handle) Node);
791 ------------------------------------------------------*/
792 }
793
794
795 /*******************************************************************************
796 *
797 * FUNCTION: acpi_ns_terminate
798 *
799 * PARAMETERS: none
800 *
801 * RETURN: none
802 *
803 * DESCRIPTION: free memory allocated for table storage.
804 *
805 ******************************************************************************/
806
807 void
acpi_ns_terminate(void)808 acpi_ns_terminate (void)
809 {
810 union acpi_operand_object *obj_desc;
811
812
813 ACPI_FUNCTION_TRACE ("ns_terminate");
814
815
816 /*
817 * 1) Free the entire namespace -- all nodes and objects
818 *
819 * Delete all object descriptors attached to namepsace nodes
820 */
821 acpi_ns_delete_namespace_subtree (acpi_gbl_root_node);
822
823 /* Detach any objects attached to the root */
824
825 obj_desc = acpi_ns_get_attached_object (acpi_gbl_root_node);
826 if (obj_desc) {
827 acpi_ns_detach_object (acpi_gbl_root_node);
828 }
829
830 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Namespace freed\n"));
831
832 /*
833 * 2) Now we can delete the ACPI tables
834 */
835 acpi_tb_delete_all_tables ();
836 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "ACPI Tables freed\n"));
837
838 return_VOID;
839 }
840
841
842 /*******************************************************************************
843 *
844 * FUNCTION: acpi_ns_opens_scope
845 *
846 * PARAMETERS: Type - A valid namespace type
847 *
848 * RETURN: NEWSCOPE if the passed type "opens a name scope" according
849 * to the ACPI specification, else 0
850 *
851 ******************************************************************************/
852
853 u32
acpi_ns_opens_scope(acpi_object_type type)854 acpi_ns_opens_scope (
855 acpi_object_type type)
856 {
857 ACPI_FUNCTION_TRACE_STR ("ns_opens_scope", acpi_ut_get_type_name (type));
858
859
860 if (!acpi_ut_valid_object_type (type)) {
861 /* type code out of range */
862
863 ACPI_REPORT_WARNING (("ns_opens_scope: Invalid Object Type %X\n", type));
864 return_VALUE (ACPI_NS_NORMAL);
865 }
866
867 return_VALUE (((u32) acpi_gbl_ns_properties[type]) & ACPI_NS_NEWSCOPE);
868 }
869
870
871 /*******************************************************************************
872 *
873 * FUNCTION: acpi_ns_get_node_by_path
874 *
875 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
876 * \ (backslash) and ^ (carat) prefixes, and the
877 * . (period) to separate segments are supported.
878 * start_node - Root of subtree to be searched, or NS_ALL for the
879 * root of the name space. If Name is fully
880 * qualified (first s8 is '\'), the passed value
881 * of Scope will not be accessed.
882 * Flags - Used to indicate whether to perform upsearch or
883 * not.
884 * return_node - Where the Node is returned
885 *
886 * DESCRIPTION: Look up a name relative to a given scope and return the
887 * corresponding Node. NOTE: Scope can be null.
888 *
889 * MUTEX: Locks namespace
890 *
891 ******************************************************************************/
892
893 acpi_status
acpi_ns_get_node_by_path(char * pathname,struct acpi_namespace_node * start_node,u32 flags,struct acpi_namespace_node ** return_node)894 acpi_ns_get_node_by_path (
895 char *pathname,
896 struct acpi_namespace_node *start_node,
897 u32 flags,
898 struct acpi_namespace_node **return_node)
899 {
900 union acpi_generic_state scope_info;
901 acpi_status status;
902 char *internal_path = NULL;
903
904
905 ACPI_FUNCTION_TRACE_PTR ("ns_get_node_by_path", pathname);
906
907
908 if (pathname) {
909 /* Convert path to internal representation */
910
911 status = acpi_ns_internalize_name (pathname, &internal_path);
912 if (ACPI_FAILURE (status)) {
913 return_ACPI_STATUS (status);
914 }
915 }
916
917 /* Must lock namespace during lookup */
918
919 status = acpi_ut_acquire_mutex (ACPI_MTX_NAMESPACE);
920 if (ACPI_FAILURE (status)) {
921 goto cleanup;
922 }
923
924 /* Setup lookup scope (search starting point) */
925
926 scope_info.scope.node = start_node;
927
928 /* Lookup the name in the namespace */
929
930 status = acpi_ns_lookup (&scope_info, internal_path,
931 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
932 (flags | ACPI_NS_DONT_OPEN_SCOPE),
933 NULL, return_node);
934 if (ACPI_FAILURE (status)) {
935 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "%s, %s\n",
936 internal_path, acpi_format_exception (status)));
937 }
938
939 (void) acpi_ut_release_mutex (ACPI_MTX_NAMESPACE);
940
941 cleanup:
942 /* Cleanup */
943 if (internal_path) {
944 ACPI_MEM_FREE (internal_path);
945 }
946 return_ACPI_STATUS (status);
947 }
948
949
950 /*******************************************************************************
951 *
952 * FUNCTION: acpi_ns_find_parent_name
953 *
954 * PARAMETERS: *child_node - Named Obj whose name is to be found
955 *
956 * RETURN: The ACPI name
957 *
958 * DESCRIPTION: Search for the given obj in its parent scope and return the
959 * name segment, or "????" if the parent name can't be found
960 * (which "should not happen").
961 *
962 ******************************************************************************/
963
964 acpi_name
acpi_ns_find_parent_name(struct acpi_namespace_node * child_node)965 acpi_ns_find_parent_name (
966 struct acpi_namespace_node *child_node)
967 {
968 struct acpi_namespace_node *parent_node;
969
970
971 ACPI_FUNCTION_TRACE ("ns_find_parent_name");
972
973
974 if (child_node) {
975 /* Valid entry. Get the parent Node */
976
977 parent_node = acpi_ns_get_parent_node (child_node);
978 if (parent_node) {
979 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Parent of %p [%4.4s] is %p [%4.4s]\n",
980 child_node, acpi_ut_get_node_name (child_node),
981 parent_node, acpi_ut_get_node_name (parent_node)));
982
983 if (parent_node->name.integer) {
984 return_VALUE ((acpi_name) parent_node->name.integer);
985 }
986 }
987
988 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "unable to find parent of %p (%4.4s)\n",
989 child_node, acpi_ut_get_node_name (child_node)));
990 }
991
992 return_VALUE (ACPI_UNKNOWN_NAME);
993 }
994
995
996 /*******************************************************************************
997 *
998 * FUNCTION: acpi_ns_get_parent_node
999 *
1000 * PARAMETERS: Node - Current table entry
1001 *
1002 * RETURN: Parent entry of the given entry
1003 *
1004 * DESCRIPTION: Obtain the parent entry for a given entry in the namespace.
1005 *
1006 ******************************************************************************/
1007
1008
1009 struct acpi_namespace_node *
acpi_ns_get_parent_node(struct acpi_namespace_node * node)1010 acpi_ns_get_parent_node (
1011 struct acpi_namespace_node *node)
1012 {
1013 ACPI_FUNCTION_ENTRY ();
1014
1015
1016 if (!node) {
1017 return (NULL);
1018 }
1019
1020 /*
1021 * Walk to the end of this peer list.
1022 * The last entry is marked with a flag and the peer
1023 * pointer is really a pointer back to the parent.
1024 * This saves putting a parent back pointer in each and
1025 * every named object!
1026 */
1027 while (!(node->flags & ANOBJ_END_OF_PEER_LIST)) {
1028 node = node->peer;
1029 }
1030
1031
1032 return (node->peer);
1033 }
1034
1035
1036 /*******************************************************************************
1037 *
1038 * FUNCTION: acpi_ns_get_next_valid_node
1039 *
1040 * PARAMETERS: Node - Current table entry
1041 *
1042 * RETURN: Next valid Node in the linked node list. NULL if no more valid
1043 * nodess
1044 *
1045 * DESCRIPTION: Find the next valid node within a name table.
1046 * Useful for implementing NULL-end-of-list loops.
1047 *
1048 ******************************************************************************/
1049
1050
1051 struct acpi_namespace_node *
acpi_ns_get_next_valid_node(struct acpi_namespace_node * node)1052 acpi_ns_get_next_valid_node (
1053 struct acpi_namespace_node *node)
1054 {
1055
1056 /* If we are at the end of this peer list, return NULL */
1057
1058 if (node->flags & ANOBJ_END_OF_PEER_LIST) {
1059 return NULL;
1060 }
1061
1062 /* Otherwise just return the next peer */
1063
1064 return (node->peer);
1065 }
1066
1067
1068