mm-only debug patch...
[mmotm.git] / drivers / acpi / acpica / nspredef.c
blobf8427afeebdfb2017043e753888a9aa8d0250ad7
1 /******************************************************************************
3 * Module Name: nspredef - Validation of ACPI predefined methods and objects
4 * $Revision: 1.1 $
6 *****************************************************************************/
8 /*
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
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.
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.
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.
45 #define ACPI_CREATE_PREDEFINED_TABLE
47 #include <acpi/acpi.h>
48 #include "accommon.h"
49 #include "acnamesp.h"
50 #include "acpredef.h"
52 #define _COMPONENT ACPI_NAMESPACE
53 ACPI_MODULE_NAME("nspredef")
55 /*******************************************************************************
57 * This module validates predefined ACPI objects that appear in the namespace,
58 * at the time they are evaluated (via acpi_evaluate_object). The purpose of this
59 * validation is to detect problems with BIOS-exposed predefined ACPI objects
60 * before the results are returned to the ACPI-related drivers.
62 * There are several areas that are validated:
64 * 1) The number of input arguments as defined by the method/object in the
65 * ASL is validated against the ACPI specification.
66 * 2) The type of the return object (if any) is validated against the ACPI
67 * specification.
68 * 3) For returned package objects, the count of package elements is
69 * validated, as well as the type of each package element. Nested
70 * packages are supported.
72 * For any problems found, a warning message is issued.
74 ******************************************************************************/
75 /* Local prototypes */
76 static acpi_status
77 acpi_ns_check_package(struct acpi_predefined_data *data,
78 union acpi_operand_object **return_object_ptr);
80 static acpi_status
81 acpi_ns_check_package_list(struct acpi_predefined_data *data,
82 const union acpi_predefined_info *package,
83 union acpi_operand_object **elements, u32 count);
85 static acpi_status
86 acpi_ns_check_package_elements(struct acpi_predefined_data *data,
87 union acpi_operand_object **elements,
88 u8 type1,
89 u32 count1,
90 u8 type2, u32 count2, u32 start_index);
92 static acpi_status
93 acpi_ns_check_object_type(struct acpi_predefined_data *data,
94 union acpi_operand_object **return_object_ptr,
95 u32 expected_btypes, u32 package_index);
97 static acpi_status
98 acpi_ns_check_reference(struct acpi_predefined_data *data,
99 union acpi_operand_object *return_object);
101 static void acpi_ns_get_expected_types(char *buffer, u32 expected_btypes);
104 * Names for the types that can be returned by the predefined objects.
105 * Used for warning messages. Must be in the same order as the ACPI_RTYPEs
107 static const char *acpi_rtype_names[] = {
108 "/Integer",
109 "/String",
110 "/Buffer",
111 "/Package",
112 "/Reference",
115 /*******************************************************************************
117 * FUNCTION: acpi_ns_check_predefined_names
119 * PARAMETERS: Node - Namespace node for the method/object
120 * user_param_count - Number of parameters actually passed
121 * return_status - Status from the object evaluation
122 * return_object_ptr - Pointer to the object returned from the
123 * evaluation of a method or object
125 * RETURN: Status
127 * DESCRIPTION: Check an ACPI name for a match in the predefined name list.
129 ******************************************************************************/
131 acpi_status
132 acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
133 u32 user_param_count,
134 acpi_status return_status,
135 union acpi_operand_object **return_object_ptr)
137 union acpi_operand_object *return_object = *return_object_ptr;
138 acpi_status status = AE_OK;
139 const union acpi_predefined_info *predefined;
140 char *pathname;
141 struct acpi_predefined_data *data;
143 /* Match the name for this method/object against the predefined list */
145 predefined = acpi_ns_check_for_predefined_name(node);
147 /* Get the full pathname to the object, for use in warning messages */
149 pathname = acpi_ns_get_external_pathname(node);
150 if (!pathname) {
151 return AE_OK; /* Could not get pathname, ignore */
155 * Check that the parameter count for this method matches the ASL
156 * definition. For predefined names, ensure that both the caller and
157 * the method itself are in accordance with the ACPI specification.
159 acpi_ns_check_parameter_count(pathname, node, user_param_count,
160 predefined);
162 /* If not a predefined name, we cannot validate the return object */
164 if (!predefined) {
165 goto cleanup;
169 * If the method failed or did not actually return an object, we cannot
170 * validate the return object
172 if ((return_status != AE_OK) && (return_status != AE_CTRL_RETURN_VALUE)) {
173 goto cleanup;
177 * If there is no return value, check if we require a return value for
178 * this predefined name. Either one return value is expected, or none,
179 * for both methods and other objects.
181 * Exit now if there is no return object. Warning if one was expected.
183 if (!return_object) {
184 if ((predefined->info.expected_btypes) &&
185 (!(predefined->info.expected_btypes & ACPI_RTYPE_NONE))) {
186 ACPI_WARN_PREDEFINED((AE_INFO, pathname,
187 ACPI_WARN_ALWAYS,
188 "Missing expected return value"));
190 status = AE_AML_NO_RETURN_VALUE;
192 goto cleanup;
196 * 1) We have a return value, but if one wasn't expected, just exit, this is
197 * not a problem. For example, if the "Implicit Return" feature is
198 * enabled, methods will always return a value.
200 * 2) If the return value can be of any type, then we cannot perform any
201 * validation, exit.
203 if ((!predefined->info.expected_btypes) ||
204 (predefined->info.expected_btypes == ACPI_RTYPE_ALL)) {
205 goto cleanup;
208 /* Create the parameter data block for object validation */
210 data = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_predefined_data));
211 if (!data) {
212 goto cleanup;
214 data->predefined = predefined;
215 data->node_flags = node->flags;
216 data->pathname = pathname;
219 * Check that the type of the return object is what is expected for
220 * this predefined name
222 status = acpi_ns_check_object_type(data, return_object_ptr,
223 predefined->info.expected_btypes,
224 ACPI_NOT_PACKAGE_ELEMENT);
225 if (ACPI_FAILURE(status)) {
226 goto check_validation_status;
229 /* For returned Package objects, check the type of all sub-objects */
231 if (return_object->common.type == ACPI_TYPE_PACKAGE) {
232 status = acpi_ns_check_package(data, return_object_ptr);
235 check_validation_status:
237 * If the object validation failed or if we successfully repaired one
238 * or more objects, mark the parent node to suppress further warning
239 * messages during the next evaluation of the same method/object.
241 if (ACPI_FAILURE(status) || (data->flags & ACPI_OBJECT_REPAIRED)) {
242 node->flags |= ANOBJ_EVALUATED;
244 ACPI_FREE(data);
246 cleanup:
247 ACPI_FREE(pathname);
248 return (status);
251 /*******************************************************************************
253 * FUNCTION: acpi_ns_check_parameter_count
255 * PARAMETERS: Pathname - Full pathname to the node (for error msgs)
256 * Node - Namespace node for the method/object
257 * user_param_count - Number of args passed in by the caller
258 * Predefined - Pointer to entry in predefined name table
260 * RETURN: None
262 * DESCRIPTION: Check that the declared (in ASL/AML) parameter count for a
263 * predefined name is what is expected (i.e., what is defined in
264 * the ACPI specification for this predefined name.)
266 ******************************************************************************/
268 void
269 acpi_ns_check_parameter_count(char *pathname,
270 struct acpi_namespace_node *node,
271 u32 user_param_count,
272 const union acpi_predefined_info *predefined)
274 u32 param_count;
275 u32 required_params_current;
276 u32 required_params_old;
278 /* Methods have 0-7 parameters. All other types have zero. */
280 param_count = 0;
281 if (node->type == ACPI_TYPE_METHOD) {
282 param_count = node->object->method.param_count;
285 if (!predefined) {
287 * Check the parameter count for non-predefined methods/objects.
289 * Warning if too few or too many arguments have been passed by the
290 * caller. An incorrect number of arguments may not cause the method
291 * to fail. However, the method will fail if there are too few
292 * arguments and the method attempts to use one of the missing ones.
294 if (user_param_count < param_count) {
295 ACPI_WARN_PREDEFINED((AE_INFO, pathname,
296 ACPI_WARN_ALWAYS,
297 "Insufficient arguments - needs %u, found %u",
298 param_count, user_param_count));
299 } else if (user_param_count > param_count) {
300 ACPI_WARN_PREDEFINED((AE_INFO, pathname,
301 ACPI_WARN_ALWAYS,
302 "Excess arguments - needs %u, found %u",
303 param_count, user_param_count));
305 return;
309 * Validate the user-supplied parameter count.
310 * Allow two different legal argument counts (_SCP, etc.)
312 required_params_current = predefined->info.param_count & 0x0F;
313 required_params_old = predefined->info.param_count >> 4;
315 if (user_param_count != ACPI_UINT32_MAX) {
316 if ((user_param_count != required_params_current) &&
317 (user_param_count != required_params_old)) {
318 ACPI_WARN_PREDEFINED((AE_INFO, pathname,
319 ACPI_WARN_ALWAYS,
320 "Parameter count mismatch - "
321 "caller passed %u, ACPI requires %u",
322 user_param_count,
323 required_params_current));
328 * Check that the ASL-defined parameter count is what is expected for
329 * this predefined name (parameter count as defined by the ACPI
330 * specification)
332 if ((param_count != required_params_current) &&
333 (param_count != required_params_old)) {
334 ACPI_WARN_PREDEFINED((AE_INFO, pathname, node->flags,
335 "Parameter count mismatch - ASL declared %u, ACPI requires %u",
336 param_count, required_params_current));
340 /*******************************************************************************
342 * FUNCTION: acpi_ns_check_for_predefined_name
344 * PARAMETERS: Node - Namespace node for the method/object
346 * RETURN: Pointer to entry in predefined table. NULL indicates not found.
348 * DESCRIPTION: Check an object name against the predefined object list.
350 ******************************************************************************/
352 const union acpi_predefined_info *acpi_ns_check_for_predefined_name(struct
353 acpi_namespace_node
354 *node)
356 const union acpi_predefined_info *this_name;
358 /* Quick check for a predefined name, first character must be underscore */
360 if (node->name.ascii[0] != '_') {
361 return (NULL);
364 /* Search info table for a predefined method/object name */
366 this_name = predefined_names;
367 while (this_name->info.name[0]) {
368 if (ACPI_COMPARE_NAME(node->name.ascii, this_name->info.name)) {
369 return (this_name);
373 * Skip next entry in the table if this name returns a Package
374 * (next entry contains the package info)
376 if (this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) {
377 this_name++;
380 this_name++;
383 return (NULL); /* Not found */
386 /*******************************************************************************
388 * FUNCTION: acpi_ns_check_package
390 * PARAMETERS: Data - Pointer to validation data structure
391 * return_object_ptr - Pointer to the object returned from the
392 * evaluation of a method or object
394 * RETURN: Status
396 * DESCRIPTION: Check a returned package object for the correct count and
397 * correct type of all sub-objects.
399 ******************************************************************************/
401 static acpi_status
402 acpi_ns_check_package(struct acpi_predefined_data *data,
403 union acpi_operand_object **return_object_ptr)
405 union acpi_operand_object *return_object = *return_object_ptr;
406 const union acpi_predefined_info *package;
407 union acpi_operand_object **elements;
408 acpi_status status = AE_OK;
409 u32 expected_count;
410 u32 count;
411 u32 i;
413 ACPI_FUNCTION_NAME(ns_check_package);
415 /* The package info for this name is in the next table entry */
417 package = data->predefined + 1;
419 ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
420 "%s Validating return Package of Type %X, Count %X\n",
421 data->pathname, package->ret_info.type,
422 return_object->package.count));
424 /* Extract package count and elements array */
426 elements = return_object->package.elements;
427 count = return_object->package.count;
429 /* The package must have at least one element, else invalid */
431 if (!count) {
432 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
433 "Return Package has no elements (empty)"));
435 return (AE_AML_OPERAND_VALUE);
439 * Decode the type of the expected package contents
441 * PTYPE1 packages contain no subpackages
442 * PTYPE2 packages contain sub-packages
444 switch (package->ret_info.type) {
445 case ACPI_PTYPE1_FIXED:
448 * The package count is fixed and there are no sub-packages
450 * If package is too small, exit.
451 * If package is larger than expected, issue warning but continue
453 expected_count =
454 package->ret_info.count1 + package->ret_info.count2;
455 if (count < expected_count) {
456 goto package_too_small;
457 } else if (count > expected_count) {
458 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname,
459 data->node_flags,
460 "Return Package is larger than needed - "
461 "found %u, expected %u", count,
462 expected_count));
465 /* Validate all elements of the returned package */
467 status = acpi_ns_check_package_elements(data, elements,
468 package->ret_info.
469 object_type1,
470 package->ret_info.
471 count1,
472 package->ret_info.
473 object_type2,
474 package->ret_info.
475 count2, 0);
476 break;
478 case ACPI_PTYPE1_VAR:
481 * The package count is variable, there are no sub-packages, and all
482 * elements must be of the same type
484 for (i = 0; i < count; i++) {
485 status = acpi_ns_check_object_type(data, elements,
486 package->ret_info.
487 object_type1, i);
488 if (ACPI_FAILURE(status)) {
489 return (status);
491 elements++;
493 break;
495 case ACPI_PTYPE1_OPTION:
498 * The package count is variable, there are no sub-packages. There are
499 * a fixed number of required elements, and a variable number of
500 * optional elements.
502 * Check if package is at least as large as the minimum required
504 expected_count = package->ret_info3.count;
505 if (count < expected_count) {
506 goto package_too_small;
509 /* Variable number of sub-objects */
511 for (i = 0; i < count; i++) {
512 if (i < package->ret_info3.count) {
514 /* These are the required package elements (0, 1, or 2) */
516 status =
517 acpi_ns_check_object_type(data, elements,
518 package->
519 ret_info3.
520 object_type[i],
522 if (ACPI_FAILURE(status)) {
523 return (status);
525 } else {
526 /* These are the optional package elements */
528 status =
529 acpi_ns_check_object_type(data, elements,
530 package->
531 ret_info3.
532 tail_object_type,
534 if (ACPI_FAILURE(status)) {
535 return (status);
538 elements++;
540 break;
542 case ACPI_PTYPE2_REV_FIXED:
544 /* First element is the (Integer) revision */
546 status = acpi_ns_check_object_type(data, elements,
547 ACPI_RTYPE_INTEGER, 0);
548 if (ACPI_FAILURE(status)) {
549 return (status);
552 elements++;
553 count--;
555 /* Examine the sub-packages */
557 status =
558 acpi_ns_check_package_list(data, package, elements, count);
559 break;
561 case ACPI_PTYPE2_PKG_COUNT:
563 /* First element is the (Integer) count of sub-packages to follow */
565 status = acpi_ns_check_object_type(data, elements,
566 ACPI_RTYPE_INTEGER, 0);
567 if (ACPI_FAILURE(status)) {
568 return (status);
572 * Count cannot be larger than the parent package length, but allow it
573 * to be smaller. The >= accounts for the Integer above.
575 expected_count = (u32) (*elements)->integer.value;
576 if (expected_count >= count) {
577 goto package_too_small;
580 count = expected_count;
581 elements++;
583 /* Examine the sub-packages */
585 status =
586 acpi_ns_check_package_list(data, package, elements, count);
587 break;
589 case ACPI_PTYPE2:
590 case ACPI_PTYPE2_FIXED:
591 case ACPI_PTYPE2_MIN:
592 case ACPI_PTYPE2_COUNT:
595 * These types all return a single Package that consists of a
596 * variable number of sub-Packages.
598 * First, ensure that the first element is a sub-Package. If not,
599 * the BIOS may have incorrectly returned the object as a single
600 * package instead of a Package of Packages (a common error if
601 * there is only one entry). We may be able to repair this by
602 * wrapping the returned Package with a new outer Package.
604 if ((*elements)->common.type != ACPI_TYPE_PACKAGE) {
606 /* Create the new outer package and populate it */
608 status =
609 acpi_ns_repair_package_list(data,
610 return_object_ptr);
611 if (ACPI_FAILURE(status)) {
612 return (status);
615 /* Update locals to point to the new package (of 1 element) */
617 return_object = *return_object_ptr;
618 elements = return_object->package.elements;
619 count = 1;
622 /* Examine the sub-packages */
624 status =
625 acpi_ns_check_package_list(data, package, elements, count);
626 break;
628 default:
630 /* Should not get here if predefined info table is correct */
632 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
633 "Invalid internal return type in table entry: %X",
634 package->ret_info.type));
636 return (AE_AML_INTERNAL);
639 return (status);
641 package_too_small:
643 /* Error exit for the case with an incorrect package count */
645 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
646 "Return Package is too small - found %u elements, expected %u",
647 count, expected_count));
649 return (AE_AML_OPERAND_VALUE);
652 /*******************************************************************************
654 * FUNCTION: acpi_ns_check_package_list
656 * PARAMETERS: Data - Pointer to validation data structure
657 * Package - Pointer to package-specific info for method
658 * Elements - Element list of parent package. All elements
659 * of this list should be of type Package.
660 * Count - Count of subpackages
662 * RETURN: Status
664 * DESCRIPTION: Examine a list of subpackages
666 ******************************************************************************/
668 static acpi_status
669 acpi_ns_check_package_list(struct acpi_predefined_data *data,
670 const union acpi_predefined_info *package,
671 union acpi_operand_object **elements, u32 count)
673 union acpi_operand_object *sub_package;
674 union acpi_operand_object **sub_elements;
675 acpi_status status;
676 u32 expected_count;
677 u32 i;
678 u32 j;
680 /* Validate each sub-Package in the parent Package */
682 for (i = 0; i < count; i++) {
683 sub_package = *elements;
684 sub_elements = sub_package->package.elements;
686 /* Each sub-object must be of type Package */
688 status = acpi_ns_check_object_type(data, &sub_package,
689 ACPI_RTYPE_PACKAGE, i);
690 if (ACPI_FAILURE(status)) {
691 return (status);
694 /* Examine the different types of expected sub-packages */
696 switch (package->ret_info.type) {
697 case ACPI_PTYPE2:
698 case ACPI_PTYPE2_PKG_COUNT:
699 case ACPI_PTYPE2_REV_FIXED:
701 /* Each subpackage has a fixed number of elements */
703 expected_count =
704 package->ret_info.count1 + package->ret_info.count2;
705 if (sub_package->package.count < expected_count) {
706 goto package_too_small;
709 status =
710 acpi_ns_check_package_elements(data, sub_elements,
711 package->ret_info.
712 object_type1,
713 package->ret_info.
714 count1,
715 package->ret_info.
716 object_type2,
717 package->ret_info.
718 count2, 0);
719 if (ACPI_FAILURE(status)) {
720 return (status);
722 break;
724 case ACPI_PTYPE2_FIXED:
726 /* Each sub-package has a fixed length */
728 expected_count = package->ret_info2.count;
729 if (sub_package->package.count < expected_count) {
730 goto package_too_small;
733 /* Check the type of each sub-package element */
735 for (j = 0; j < expected_count; j++) {
736 status =
737 acpi_ns_check_object_type(data,
738 &sub_elements[j],
739 package->
740 ret_info2.
741 object_type[j],
743 if (ACPI_FAILURE(status)) {
744 return (status);
747 break;
749 case ACPI_PTYPE2_MIN:
751 /* Each sub-package has a variable but minimum length */
753 expected_count = package->ret_info.count1;
754 if (sub_package->package.count < expected_count) {
755 goto package_too_small;
758 /* Check the type of each sub-package element */
760 status =
761 acpi_ns_check_package_elements(data, sub_elements,
762 package->ret_info.
763 object_type1,
764 sub_package->package.
765 count, 0, 0, 0);
766 if (ACPI_FAILURE(status)) {
767 return (status);
769 break;
771 case ACPI_PTYPE2_COUNT:
774 * First element is the (Integer) count of elements, including
775 * the count field.
777 status = acpi_ns_check_object_type(data, sub_elements,
778 ACPI_RTYPE_INTEGER,
780 if (ACPI_FAILURE(status)) {
781 return (status);
785 * Make sure package is large enough for the Count and is
786 * is as large as the minimum size
788 expected_count = (u32)(*sub_elements)->integer.value;
789 if (sub_package->package.count < expected_count) {
790 goto package_too_small;
792 if (sub_package->package.count <
793 package->ret_info.count1) {
794 expected_count = package->ret_info.count1;
795 goto package_too_small;
798 /* Check the type of each sub-package element */
800 status =
801 acpi_ns_check_package_elements(data,
802 (sub_elements + 1),
803 package->ret_info.
804 object_type1,
805 (expected_count - 1),
806 0, 0, 1);
807 if (ACPI_FAILURE(status)) {
808 return (status);
810 break;
812 default: /* Should not get here, type was validated by caller */
814 return (AE_AML_INTERNAL);
817 elements++;
820 return (AE_OK);
822 package_too_small:
824 /* The sub-package count was smaller than required */
826 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
827 "Return Sub-Package[%u] is too small - found %u elements, expected %u",
828 i, sub_package->package.count, expected_count));
830 return (AE_AML_OPERAND_VALUE);
833 /*******************************************************************************
835 * FUNCTION: acpi_ns_check_package_elements
837 * PARAMETERS: Data - Pointer to validation data structure
838 * Elements - Pointer to the package elements array
839 * Type1 - Object type for first group
840 * Count1 - Count for first group
841 * Type2 - Object type for second group
842 * Count2 - Count for second group
843 * start_index - Start of the first group of elements
845 * RETURN: Status
847 * DESCRIPTION: Check that all elements of a package are of the correct object
848 * type. Supports up to two groups of different object types.
850 ******************************************************************************/
852 static acpi_status
853 acpi_ns_check_package_elements(struct acpi_predefined_data *data,
854 union acpi_operand_object **elements,
855 u8 type1,
856 u32 count1,
857 u8 type2, u32 count2, u32 start_index)
859 union acpi_operand_object **this_element = elements;
860 acpi_status status;
861 u32 i;
864 * Up to two groups of package elements are supported by the data
865 * structure. All elements in each group must be of the same type.
866 * The second group can have a count of zero.
868 for (i = 0; i < count1; i++) {
869 status = acpi_ns_check_object_type(data, this_element,
870 type1, i + start_index);
871 if (ACPI_FAILURE(status)) {
872 return (status);
874 this_element++;
877 for (i = 0; i < count2; i++) {
878 status = acpi_ns_check_object_type(data, this_element,
879 type2,
880 (i + count1 + start_index));
881 if (ACPI_FAILURE(status)) {
882 return (status);
884 this_element++;
887 return (AE_OK);
890 /*******************************************************************************
892 * FUNCTION: acpi_ns_check_object_type
894 * PARAMETERS: Data - Pointer to validation data structure
895 * return_object_ptr - Pointer to the object returned from the
896 * evaluation of a method or object
897 * expected_btypes - Bitmap of expected return type(s)
898 * package_index - Index of object within parent package (if
899 * applicable - ACPI_NOT_PACKAGE_ELEMENT
900 * otherwise)
902 * RETURN: Status
904 * DESCRIPTION: Check the type of the return object against the expected object
905 * type(s). Use of Btype allows multiple expected object types.
907 ******************************************************************************/
909 static acpi_status
910 acpi_ns_check_object_type(struct acpi_predefined_data *data,
911 union acpi_operand_object **return_object_ptr,
912 u32 expected_btypes, u32 package_index)
914 union acpi_operand_object *return_object = *return_object_ptr;
915 acpi_status status = AE_OK;
916 u32 return_btype;
917 char type_buffer[48]; /* Room for 5 types */
920 * If we get a NULL return_object here, it is a NULL package element,
921 * and this is always an error.
923 if (!return_object) {
924 goto type_error_exit;
927 /* A Namespace node should not get here, but make sure */
929 if (ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
930 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
931 "Invalid return type - Found a Namespace node [%4.4s] type %s",
932 return_object->node.name.ascii,
933 acpi_ut_get_type_name(return_object->node.
934 type)));
935 return (AE_AML_OPERAND_TYPE);
939 * Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
940 * The bitmapped type allows multiple possible return types.
942 * Note, the cases below must handle all of the possible types returned
943 * from all of the predefined names (including elements of returned
944 * packages)
946 switch (return_object->common.type) {
947 case ACPI_TYPE_INTEGER:
948 return_btype = ACPI_RTYPE_INTEGER;
949 break;
951 case ACPI_TYPE_BUFFER:
952 return_btype = ACPI_RTYPE_BUFFER;
953 break;
955 case ACPI_TYPE_STRING:
956 return_btype = ACPI_RTYPE_STRING;
957 break;
959 case ACPI_TYPE_PACKAGE:
960 return_btype = ACPI_RTYPE_PACKAGE;
961 break;
963 case ACPI_TYPE_LOCAL_REFERENCE:
964 return_btype = ACPI_RTYPE_REFERENCE;
965 break;
967 default:
968 /* Not one of the supported objects, must be incorrect */
970 goto type_error_exit;
973 /* Is the object one of the expected types? */
975 if (!(return_btype & expected_btypes)) {
977 /* Type mismatch -- attempt repair of the returned object */
979 status = acpi_ns_repair_object(data, expected_btypes,
980 package_index,
981 return_object_ptr);
982 if (ACPI_SUCCESS(status)) {
983 return (AE_OK); /* Repair was successful */
985 goto type_error_exit;
988 /* For reference objects, check that the reference type is correct */
990 if (return_object->common.type == ACPI_TYPE_LOCAL_REFERENCE) {
991 status = acpi_ns_check_reference(data, return_object);
994 return (status);
996 type_error_exit:
998 /* Create a string with all expected types for this predefined object */
1000 acpi_ns_get_expected_types(type_buffer, expected_btypes);
1002 if (package_index == ACPI_NOT_PACKAGE_ELEMENT) {
1003 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
1004 "Return type mismatch - found %s, expected %s",
1005 acpi_ut_get_object_type_name
1006 (return_object), type_buffer));
1007 } else {
1008 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
1009 "Return Package type mismatch at index %u - "
1010 "found %s, expected %s", package_index,
1011 acpi_ut_get_object_type_name
1012 (return_object), type_buffer));
1015 return (AE_AML_OPERAND_TYPE);
1018 /*******************************************************************************
1020 * FUNCTION: acpi_ns_check_reference
1022 * PARAMETERS: Data - Pointer to validation data structure
1023 * return_object - Object returned from the evaluation of a
1024 * method or object
1026 * RETURN: Status
1028 * DESCRIPTION: Check a returned reference object for the correct reference
1029 * type. The only reference type that can be returned from a
1030 * predefined method is a named reference. All others are invalid.
1032 ******************************************************************************/
1034 static acpi_status
1035 acpi_ns_check_reference(struct acpi_predefined_data *data,
1036 union acpi_operand_object *return_object)
1040 * Check the reference object for the correct reference type (opcode).
1041 * The only type of reference that can be converted to an union acpi_object is
1042 * a reference to a named object (reference class: NAME)
1044 if (return_object->reference.class == ACPI_REFCLASS_NAME) {
1045 return (AE_OK);
1048 ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
1049 "Return type mismatch - unexpected reference object type [%s] %2.2X",
1050 acpi_ut_get_reference_name(return_object),
1051 return_object->reference.class));
1053 return (AE_AML_OPERAND_TYPE);
1056 /*******************************************************************************
1058 * FUNCTION: acpi_ns_get_expected_types
1060 * PARAMETERS: Buffer - Pointer to where the string is returned
1061 * expected_btypes - Bitmap of expected return type(s)
1063 * RETURN: Buffer is populated with type names.
1065 * DESCRIPTION: Translate the expected types bitmap into a string of ascii
1066 * names of expected types, for use in warning messages.
1068 ******************************************************************************/
1070 static void acpi_ns_get_expected_types(char *buffer, u32 expected_btypes)
1072 u32 this_rtype;
1073 u32 i;
1074 u32 j;
1076 j = 1;
1077 buffer[0] = 0;
1078 this_rtype = ACPI_RTYPE_INTEGER;
1080 for (i = 0; i < ACPI_NUM_RTYPES; i++) {
1082 /* If one of the expected types, concatenate the name of this type */
1084 if (expected_btypes & this_rtype) {
1085 ACPI_STRCAT(buffer, &acpi_rtype_names[i][j]);
1086 j = 0; /* Use name separator from now on */
1088 this_rtype <<= 1; /* Next Rtype */