1 /******************************************************************************
3 * Module Name: nsutils - Utilities for accessing ACPI namespace, accessing
4 * parents and siblings and Scope manipulation
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2008, Intel Corp.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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.
45 #include <acpi/acpi.h>
46 #include <acpi/acnamesp.h>
47 #include <acpi/amlcode.h>
48 #include <acpi/actables.h>
50 #define _COMPONENT ACPI_NAMESPACE
51 ACPI_MODULE_NAME("nsutils")
53 /* Local prototypes */
54 static u8
acpi_ns_valid_path_separator(char sep
);
56 #ifdef ACPI_OBSOLETE_FUNCTIONS
57 acpi_name
acpi_ns_find_parent_name(struct acpi_namespace_node
*node_to_search
);
60 /*******************************************************************************
62 * FUNCTION: acpi_ns_report_error
64 * PARAMETERS: module_name - Caller's module name (for error output)
65 * line_number - Caller's line number (for error output)
66 * internal_name - Name or path of the namespace node
67 * lookup_status - Exception code from NS lookup
71 * DESCRIPTION: Print warning message with full pathname
73 ******************************************************************************/
76 acpi_ns_report_error(const char *module_name
,
78 const char *internal_name
, acpi_status lookup_status
)
84 acpi_os_printf("ACPI Error (%s-%04d): ", module_name
, line_number
);
86 if (lookup_status
== AE_BAD_CHARACTER
) {
88 /* There is a non-ascii character in the name */
90 ACPI_MOVE_32_TO_32(&bad_name
, internal_name
);
91 acpi_os_printf("[0x%4.4X] (NON-ASCII)", bad_name
);
93 /* Convert path to external format */
95 status
= acpi_ns_externalize_name(ACPI_UINT32_MAX
,
96 internal_name
, NULL
, &name
);
98 /* Print target name */
100 if (ACPI_SUCCESS(status
)) {
101 acpi_os_printf("[%s]", name
);
103 acpi_os_printf("[COULD NOT EXTERNALIZE NAME]");
111 acpi_os_printf(" Namespace lookup failure, %s\n",
112 acpi_format_exception(lookup_status
));
115 /*******************************************************************************
117 * FUNCTION: acpi_ns_report_method_error
119 * PARAMETERS: module_name - Caller's module name (for error output)
120 * line_number - Caller's line number (for error output)
121 * Message - Error message to use on failure
122 * prefix_node - Prefix relative to the path
123 * Path - Path to the node (optional)
124 * method_status - Execution status
128 * DESCRIPTION: Print warning message with full pathname
130 ******************************************************************************/
133 acpi_ns_report_method_error(const char *module_name
,
136 struct acpi_namespace_node
*prefix_node
,
137 const char *path
, acpi_status method_status
)
140 struct acpi_namespace_node
*node
= prefix_node
;
142 acpi_os_printf("ACPI Error (%s-%04d): ", module_name
, line_number
);
146 acpi_ns_get_node(prefix_node
, path
, ACPI_NS_NO_UPSEARCH
,
148 if (ACPI_FAILURE(status
)) {
149 acpi_os_printf("[Could not get node by pathname]");
153 acpi_ns_print_node_pathname(node
, message
);
154 acpi_os_printf(", %s\n", acpi_format_exception(method_status
));
157 /*******************************************************************************
159 * FUNCTION: acpi_ns_print_node_pathname
161 * PARAMETERS: Node - Object
162 * Message - Prefix message
164 * DESCRIPTION: Print an object's full namespace pathname
165 * Manages allocation/freeing of a pathname buffer
167 ******************************************************************************/
170 acpi_ns_print_node_pathname(struct acpi_namespace_node
*node
,
173 struct acpi_buffer buffer
;
177 acpi_os_printf("[NULL NAME]");
181 /* Convert handle to full pathname and print it (with supplied message) */
183 buffer
.length
= ACPI_ALLOCATE_LOCAL_BUFFER
;
185 status
= acpi_ns_handle_to_pathname(node
, &buffer
);
186 if (ACPI_SUCCESS(status
)) {
188 acpi_os_printf("%s ", message
);
191 acpi_os_printf("[%s] (Node %p)", (char *)buffer
.pointer
, node
);
192 ACPI_FREE(buffer
.pointer
);
196 /*******************************************************************************
198 * FUNCTION: acpi_ns_valid_root_prefix
200 * PARAMETERS: Prefix - Character to be checked
202 * RETURN: TRUE if a valid prefix
204 * DESCRIPTION: Check if a character is a valid ACPI Root prefix
206 ******************************************************************************/
208 u8
acpi_ns_valid_root_prefix(char prefix
)
211 return ((u8
) (prefix
== '\\'));
214 /*******************************************************************************
216 * FUNCTION: acpi_ns_valid_path_separator
218 * PARAMETERS: Sep - Character to be checked
220 * RETURN: TRUE if a valid path separator
222 * DESCRIPTION: Check if a character is a valid ACPI path separator
224 ******************************************************************************/
226 static u8
acpi_ns_valid_path_separator(char sep
)
229 return ((u8
) (sep
== '.'));
232 /*******************************************************************************
234 * FUNCTION: acpi_ns_get_type
236 * PARAMETERS: Node - Parent Node to be examined
238 * RETURN: Type field from Node whose handle is passed
240 * DESCRIPTION: Return the type of a Namespace node
242 ******************************************************************************/
244 acpi_object_type
acpi_ns_get_type(struct acpi_namespace_node
* node
)
246 ACPI_FUNCTION_TRACE(ns_get_type
);
249 ACPI_WARNING((AE_INFO
, "Null Node parameter"));
250 return_UINT32(ACPI_TYPE_ANY
);
253 return_UINT32((acpi_object_type
) node
->type
);
256 /*******************************************************************************
258 * FUNCTION: acpi_ns_local
260 * PARAMETERS: Type - A namespace object type
262 * RETURN: LOCAL if names must be found locally in objects of the
263 * passed type, 0 if enclosing scopes should be searched
265 * DESCRIPTION: Returns scope rule for the given object type.
267 ******************************************************************************/
269 u32
acpi_ns_local(acpi_object_type type
)
271 ACPI_FUNCTION_TRACE(ns_local
);
273 if (!acpi_ut_valid_object_type(type
)) {
275 /* Type code out of range */
277 ACPI_WARNING((AE_INFO
, "Invalid Object Type %X", type
));
278 return_UINT32(ACPI_NS_NORMAL
);
281 return_UINT32((u32
) acpi_gbl_ns_properties
[type
] & ACPI_NS_LOCAL
);
284 /*******************************************************************************
286 * FUNCTION: acpi_ns_get_internal_name_length
288 * PARAMETERS: Info - Info struct initialized with the
289 * external name pointer.
293 * DESCRIPTION: Calculate the length of the internal (AML) namestring
294 * corresponding to the external (ASL) namestring.
296 ******************************************************************************/
298 void acpi_ns_get_internal_name_length(struct acpi_namestring_info
*info
)
300 const char *next_external_char
;
303 ACPI_FUNCTION_ENTRY();
305 next_external_char
= info
->external_name
;
306 info
->num_carats
= 0;
307 info
->num_segments
= 0;
308 info
->fully_qualified
= FALSE
;
311 * For the internal name, the required length is 4 bytes per segment, plus
312 * 1 each for root_prefix, multi_name_prefix_op, segment count, trailing null
313 * (which is not really needed, but no there's harm in putting it there)
315 * strlen() + 1 covers the first name_seg, which has no path separator
317 if (acpi_ns_valid_root_prefix(next_external_char
[0])) {
318 info
->fully_qualified
= TRUE
;
319 next_external_char
++;
322 * Handle Carat prefixes
324 while (*next_external_char
== '^') {
326 next_external_char
++;
331 * Determine the number of ACPI name "segments" by counting the number of
332 * path separators within the string. Start with one segment since the
333 * segment count is [(# separators) + 1], and zero separators is ok.
335 if (*next_external_char
) {
336 info
->num_segments
= 1;
337 for (i
= 0; next_external_char
[i
]; i
++) {
338 if (acpi_ns_valid_path_separator(next_external_char
[i
])) {
339 info
->num_segments
++;
344 info
->length
= (ACPI_NAME_SIZE
* info
->num_segments
) +
345 4 + info
->num_carats
;
347 info
->next_external_char
= next_external_char
;
350 /*******************************************************************************
352 * FUNCTION: acpi_ns_build_internal_name
354 * PARAMETERS: Info - Info struct fully initialized
358 * DESCRIPTION: Construct the internal (AML) namestring
359 * corresponding to the external (ASL) namestring.
361 ******************************************************************************/
363 acpi_status
acpi_ns_build_internal_name(struct acpi_namestring_info
*info
)
365 u32 num_segments
= info
->num_segments
;
366 char *internal_name
= info
->internal_name
;
367 const char *external_name
= info
->next_external_char
;
371 ACPI_FUNCTION_TRACE(ns_build_internal_name
);
373 /* Setup the correct prefixes, counts, and pointers */
375 if (info
->fully_qualified
) {
376 internal_name
[0] = '\\';
378 if (num_segments
<= 1) {
379 result
= &internal_name
[1];
380 } else if (num_segments
== 2) {
381 internal_name
[1] = AML_DUAL_NAME_PREFIX
;
382 result
= &internal_name
[2];
384 internal_name
[1] = AML_MULTI_NAME_PREFIX_OP
;
385 internal_name
[2] = (char)num_segments
;
386 result
= &internal_name
[3];
390 * Not fully qualified.
391 * Handle Carats first, then append the name segments
394 if (info
->num_carats
) {
395 for (i
= 0; i
< info
->num_carats
; i
++) {
396 internal_name
[i
] = '^';
400 if (num_segments
<= 1) {
401 result
= &internal_name
[i
];
402 } else if (num_segments
== 2) {
403 internal_name
[i
] = AML_DUAL_NAME_PREFIX
;
404 result
= &internal_name
[(acpi_size
) i
+ 1];
406 internal_name
[i
] = AML_MULTI_NAME_PREFIX_OP
;
407 internal_name
[(acpi_size
) i
+ 1] = (char)num_segments
;
408 result
= &internal_name
[(acpi_size
) i
+ 2];
412 /* Build the name (minus path separators) */
414 for (; num_segments
; num_segments
--) {
415 for (i
= 0; i
< ACPI_NAME_SIZE
; i
++) {
416 if (acpi_ns_valid_path_separator(*external_name
) ||
417 (*external_name
== 0)) {
419 /* Pad the segment with underscore(s) if segment is short */
423 /* Convert the character to uppercase and save it */
426 (char)ACPI_TOUPPER((int)*external_name
);
431 /* Now we must have a path separator, or the pathname is bad */
433 if (!acpi_ns_valid_path_separator(*external_name
) &&
434 (*external_name
!= 0)) {
435 return_ACPI_STATUS(AE_BAD_PARAMETER
);
438 /* Move on the next segment */
441 result
+= ACPI_NAME_SIZE
;
444 /* Terminate the string */
448 if (info
->fully_qualified
) {
449 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
450 "Returning [%p] (abs) \"\\%s\"\n",
451 internal_name
, internal_name
));
453 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "Returning [%p] (rel) \"%s\"\n",
454 internal_name
, internal_name
));
457 return_ACPI_STATUS(AE_OK
);
460 /*******************************************************************************
462 * FUNCTION: acpi_ns_internalize_name
464 * PARAMETERS: *external_name - External representation of name
465 * **Converted Name - Where to return the resulting
466 * internal represention of the name
470 * DESCRIPTION: Convert an external representation (e.g. "\_PR_.CPU0")
471 * to internal form (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
473 *******************************************************************************/
476 acpi_ns_internalize_name(const char *external_name
, char **converted_name
)
479 struct acpi_namestring_info info
;
482 ACPI_FUNCTION_TRACE(ns_internalize_name
);
484 if ((!external_name
) || (*external_name
== 0) || (!converted_name
)) {
485 return_ACPI_STATUS(AE_BAD_PARAMETER
);
488 /* Get the length of the new internal name */
490 info
.external_name
= external_name
;
491 acpi_ns_get_internal_name_length(&info
);
493 /* We need a segment to store the internal name */
495 internal_name
= ACPI_ALLOCATE_ZEROED(info
.length
);
496 if (!internal_name
) {
497 return_ACPI_STATUS(AE_NO_MEMORY
);
502 info
.internal_name
= internal_name
;
503 status
= acpi_ns_build_internal_name(&info
);
504 if (ACPI_FAILURE(status
)) {
505 ACPI_FREE(internal_name
);
506 return_ACPI_STATUS(status
);
509 *converted_name
= internal_name
;
510 return_ACPI_STATUS(AE_OK
);
513 /*******************************************************************************
515 * FUNCTION: acpi_ns_externalize_name
517 * PARAMETERS: internal_name_length - Lenth of the internal name below
518 * internal_name - Internal representation of name
519 * converted_name_length - Where the length is returned
520 * converted_name - Where the resulting external name
525 * DESCRIPTION: Convert internal name (e.g. 5c 2f 02 5f 50 52 5f 43 50 55 30)
526 * to its external (printable) form (e.g. "\_PR_.CPU0")
528 ******************************************************************************/
531 acpi_ns_externalize_name(u32 internal_name_length
,
532 const char *internal_name
,
533 u32
* converted_name_length
, char **converted_name
)
536 u32 num_segments
= 0;
538 u32 prefix_length
= 0;
542 ACPI_FUNCTION_TRACE(ns_externalize_name
);
544 if (!internal_name_length
|| !internal_name
|| !converted_name
) {
545 return_ACPI_STATUS(AE_BAD_PARAMETER
);
549 * Check for a prefix (one '\' | one or more '^').
551 switch (internal_name
[0]) {
557 for (i
= 0; i
< internal_name_length
; i
++) {
558 if (internal_name
[i
] == '^') {
559 prefix_length
= i
+ 1;
565 if (i
== internal_name_length
) {
576 * Check for object names. Note that there could be 0-255 of these
579 if (prefix_length
< internal_name_length
) {
580 switch (internal_name
[prefix_length
]) {
581 case AML_MULTI_NAME_PREFIX_OP
:
583 /* <count> 4-byte names */
585 names_index
= prefix_length
+ 2;
587 internal_name
[(acpi_size
) prefix_length
+ 1];
590 case AML_DUAL_NAME_PREFIX
:
592 /* Two 4-byte names */
594 names_index
= prefix_length
+ 1;
608 /* one 4-byte name */
610 names_index
= prefix_length
;
617 * Calculate the length of converted_name, which equals the length
618 * of the prefix, length of all object names, length of any required
619 * punctuation ('.') between object names, plus the NULL terminator.
621 required_length
= prefix_length
+ (4 * num_segments
) +
622 ((num_segments
> 0) ? (num_segments
- 1) : 0) + 1;
625 * Check to see if we're still in bounds. If not, there's a problem
626 * with internal_name (invalid format).
628 if (required_length
> internal_name_length
) {
629 ACPI_ERROR((AE_INFO
, "Invalid internal name"));
630 return_ACPI_STATUS(AE_BAD_PATHNAME
);
634 * Build converted_name
636 *converted_name
= ACPI_ALLOCATE_ZEROED(required_length
);
637 if (!(*converted_name
)) {
638 return_ACPI_STATUS(AE_NO_MEMORY
);
643 for (i
= 0; i
< prefix_length
; i
++) {
644 (*converted_name
)[j
++] = internal_name
[i
];
647 if (num_segments
> 0) {
648 for (i
= 0; i
< num_segments
; i
++) {
650 (*converted_name
)[j
++] = '.';
653 (*converted_name
)[j
++] = internal_name
[names_index
++];
654 (*converted_name
)[j
++] = internal_name
[names_index
++];
655 (*converted_name
)[j
++] = internal_name
[names_index
++];
656 (*converted_name
)[j
++] = internal_name
[names_index
++];
660 if (converted_name_length
) {
661 *converted_name_length
= (u32
) required_length
;
664 return_ACPI_STATUS(AE_OK
);
667 /*******************************************************************************
669 * FUNCTION: acpi_ns_map_handle_to_node
671 * PARAMETERS: Handle - Handle to be converted to an Node
673 * RETURN: A Name table entry pointer
675 * DESCRIPTION: Convert a namespace handle to a real Node
677 * Note: Real integer handles would allow for more verification
678 * and keep all pointers within this subsystem - however this introduces
679 * more (and perhaps unnecessary) overhead.
681 ******************************************************************************/
683 struct acpi_namespace_node
*acpi_ns_map_handle_to_node(acpi_handle handle
)
686 ACPI_FUNCTION_ENTRY();
689 * Simple implementation
691 if ((!handle
) || (handle
== ACPI_ROOT_OBJECT
)) {
692 return (acpi_gbl_root_node
);
695 /* We can at least attempt to verify the handle */
697 if (ACPI_GET_DESCRIPTOR_TYPE(handle
) != ACPI_DESC_TYPE_NAMED
) {
701 return (ACPI_CAST_PTR(struct acpi_namespace_node
, handle
));
704 /*******************************************************************************
706 * FUNCTION: acpi_ns_convert_entry_to_handle
708 * PARAMETERS: Node - Node to be converted to a Handle
710 * RETURN: A user handle
712 * DESCRIPTION: Convert a real Node to a namespace handle
714 ******************************************************************************/
716 acpi_handle
acpi_ns_convert_entry_to_handle(struct acpi_namespace_node
*node
)
720 * Simple implementation for now;
722 return ((acpi_handle
) node
);
724 /* Example future implementation ---------------------
731 if (Node == acpi_gbl_root_node)
733 return (ACPI_ROOT_OBJECT);
736 return ((acpi_handle) Node);
737 ------------------------------------------------------*/
740 /*******************************************************************************
742 * FUNCTION: acpi_ns_terminate
748 * DESCRIPTION: free memory allocated for namespace and ACPI table storage.
750 ******************************************************************************/
752 void acpi_ns_terminate(void)
754 union acpi_operand_object
*obj_desc
;
756 ACPI_FUNCTION_TRACE(ns_terminate
);
759 * 1) Free the entire namespace -- all nodes and objects
761 * Delete all object descriptors attached to namepsace nodes
763 acpi_ns_delete_namespace_subtree(acpi_gbl_root_node
);
765 /* Detach any objects attached to the root */
767 obj_desc
= acpi_ns_get_attached_object(acpi_gbl_root_node
);
769 acpi_ns_detach_object(acpi_gbl_root_node
);
772 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "Namespace freed\n"));
776 /*******************************************************************************
778 * FUNCTION: acpi_ns_opens_scope
780 * PARAMETERS: Type - A valid namespace type
782 * RETURN: NEWSCOPE if the passed type "opens a name scope" according
783 * to the ACPI specification, else 0
785 ******************************************************************************/
787 u32
acpi_ns_opens_scope(acpi_object_type type
)
789 ACPI_FUNCTION_TRACE_STR(ns_opens_scope
, acpi_ut_get_type_name(type
));
791 if (!acpi_ut_valid_object_type(type
)) {
793 /* type code out of range */
795 ACPI_WARNING((AE_INFO
, "Invalid Object Type %X", type
));
796 return_UINT32(ACPI_NS_NORMAL
);
799 return_UINT32(((u32
) acpi_gbl_ns_properties
[type
]) & ACPI_NS_NEWSCOPE
);
802 /*******************************************************************************
804 * FUNCTION: acpi_ns_get_node
806 * PARAMETERS: *Pathname - Name to be found, in external (ASL) format. The
807 * \ (backslash) and ^ (carat) prefixes, and the
808 * . (period) to separate segments are supported.
809 * prefix_node - Root of subtree to be searched, or NS_ALL for the
810 * root of the name space. If Name is fully
811 * qualified (first s8 is '\'), the passed value
812 * of Scope will not be accessed.
813 * Flags - Used to indicate whether to perform upsearch or
815 * return_node - Where the Node is returned
817 * DESCRIPTION: Look up a name relative to a given scope and return the
818 * corresponding Node. NOTE: Scope can be null.
820 * MUTEX: Locks namespace
822 ******************************************************************************/
825 acpi_ns_get_node(struct acpi_namespace_node
*prefix_node
,
826 const char *pathname
,
827 u32 flags
, struct acpi_namespace_node
**return_node
)
829 union acpi_generic_state scope_info
;
833 ACPI_FUNCTION_TRACE_PTR(ns_get_node
, pathname
);
836 *return_node
= prefix_node
;
838 *return_node
= acpi_gbl_root_node
;
840 return_ACPI_STATUS(AE_OK
);
843 /* Convert path to internal representation */
845 status
= acpi_ns_internalize_name(pathname
, &internal_path
);
846 if (ACPI_FAILURE(status
)) {
847 return_ACPI_STATUS(status
);
850 /* Must lock namespace during lookup */
852 status
= acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE
);
853 if (ACPI_FAILURE(status
)) {
857 /* Setup lookup scope (search starting point) */
859 scope_info
.scope
.node
= prefix_node
;
861 /* Lookup the name in the namespace */
863 status
= acpi_ns_lookup(&scope_info
, internal_path
, ACPI_TYPE_ANY
,
865 (flags
| ACPI_NS_DONT_OPEN_SCOPE
), NULL
,
867 if (ACPI_FAILURE(status
)) {
868 ACPI_DEBUG_PRINT((ACPI_DB_INFO
, "%s, %s\n",
869 pathname
, acpi_format_exception(status
)));
872 (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE
);
875 ACPI_FREE(internal_path
);
876 return_ACPI_STATUS(status
);
879 /*******************************************************************************
881 * FUNCTION: acpi_ns_get_parent_node
883 * PARAMETERS: Node - Current table entry
885 * RETURN: Parent entry of the given entry
887 * DESCRIPTION: Obtain the parent entry for a given entry in the namespace.
889 ******************************************************************************/
891 struct acpi_namespace_node
*acpi_ns_get_parent_node(struct acpi_namespace_node
894 ACPI_FUNCTION_ENTRY();
901 * Walk to the end of this peer list. The last entry is marked with a flag
902 * and the peer pointer is really a pointer back to the parent. This saves
903 * putting a parent back pointer in each and every named object!
905 while (!(node
->flags
& ANOBJ_END_OF_PEER_LIST
)) {
912 /*******************************************************************************
914 * FUNCTION: acpi_ns_get_next_valid_node
916 * PARAMETERS: Node - Current table entry
918 * RETURN: Next valid Node in the linked node list. NULL if no more valid
921 * DESCRIPTION: Find the next valid node within a name table.
922 * Useful for implementing NULL-end-of-list loops.
924 ******************************************************************************/
926 struct acpi_namespace_node
*acpi_ns_get_next_valid_node(struct
931 /* If we are at the end of this peer list, return NULL */
933 if (node
->flags
& ANOBJ_END_OF_PEER_LIST
) {
937 /* Otherwise just return the next peer */
942 #ifdef ACPI_OBSOLETE_FUNCTIONS
943 /*******************************************************************************
945 * FUNCTION: acpi_ns_find_parent_name
947 * PARAMETERS: *child_node - Named Obj whose name is to be found
949 * RETURN: The ACPI name
951 * DESCRIPTION: Search for the given obj in its parent scope and return the
952 * name segment, or "????" if the parent name can't be found
953 * (which "should not happen").
955 ******************************************************************************/
957 acpi_name
acpi_ns_find_parent_name(struct acpi_namespace_node
* child_node
)
959 struct acpi_namespace_node
*parent_node
;
961 ACPI_FUNCTION_TRACE(ns_find_parent_name
);
965 /* Valid entry. Get the parent Node */
967 parent_node
= acpi_ns_get_parent_node(child_node
);
969 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
970 "Parent of %p [%4.4s] is %p [%4.4s]\n",
972 acpi_ut_get_node_name(child_node
),
974 acpi_ut_get_node_name(parent_node
)));
976 if (parent_node
->name
.integer
) {
977 return_VALUE((acpi_name
) parent_node
->name
.
982 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
983 "Unable to find parent of %p (%4.4s)\n",
985 acpi_ut_get_node_name(child_node
)));
988 return_VALUE(ACPI_UNKNOWN_NAME
);