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Pull acpica-20060707 into test branch
[deliverable/linux.git] / drivers / acpi / utilities / utmisc.c
1 /*******************************************************************************
2 *
3 * Module Name: utmisc - common utility procedures
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2006, 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 #include <linux/module.h>
45
46 #include <acpi/acpi.h>
47 #include <acpi/acnamesp.h>
48
49 #define _COMPONENT ACPI_UTILITIES
50 ACPI_MODULE_NAME("utmisc")
51
52 /*******************************************************************************
53 *
54 * FUNCTION: acpi_ut_is_aml_table
55 *
56 * PARAMETERS: Table - An ACPI table
57 *
58 * RETURN: TRUE if table contains executable AML; FALSE otherwise
59 *
60 * DESCRIPTION: Check ACPI Signature for a table that contains AML code.
61 * Currently, these are DSDT,SSDT,PSDT. All other table types are
62 * data tables that do not contain AML code.
63 *
64 ******************************************************************************/
65 u8 acpi_ut_is_aml_table(struct acpi_table_header *table)
66 {
67
68 /* These are the only tables that contain executable AML */
69
70 if (ACPI_COMPARE_NAME(table->signature, DSDT_SIG) ||
71 ACPI_COMPARE_NAME(table->signature, PSDT_SIG) ||
72 ACPI_COMPARE_NAME(table->signature, SSDT_SIG)) {
73 return (TRUE);
74 }
75
76 return (FALSE);
77 }
78
79 /*******************************************************************************
80 *
81 * FUNCTION: acpi_ut_allocate_owner_id
82 *
83 * PARAMETERS: owner_id - Where the new owner ID is returned
84 *
85 * RETURN: Status
86 *
87 * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
88 * track objects created by the table or method, to be deleted
89 * when the method exits or the table is unloaded.
90 *
91 ******************************************************************************/
92
93 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id)
94 {
95 acpi_native_uint i;
96 acpi_native_uint j;
97 acpi_native_uint k;
98 acpi_status status;
99
100 ACPI_FUNCTION_TRACE(ut_allocate_owner_id);
101
102 /* Guard against multiple allocations of ID to the same location */
103
104 if (*owner_id) {
105 ACPI_ERROR((AE_INFO, "Owner ID [%2.2X] already exists",
106 *owner_id));
107 return_ACPI_STATUS(AE_ALREADY_EXISTS);
108 }
109
110 /* Mutex for the global ID mask */
111
112 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
113 if (ACPI_FAILURE(status)) {
114 return_ACPI_STATUS(status);
115 }
116
117 /*
118 * Find a free owner ID, cycle through all possible IDs on repeated
119 * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have
120 * to be scanned twice.
121 */
122 for (i = 0, j = acpi_gbl_last_owner_id_index;
123 i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) {
124 if (j >= ACPI_NUM_OWNERID_MASKS) {
125 j = 0; /* Wraparound to start of mask array */
126 }
127
128 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) {
129 if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) {
130
131 /* There are no free IDs in this mask */
132
133 break;
134 }
135
136 if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) {
137 /*
138 * Found a free ID. The actual ID is the bit index plus one,
139 * making zero an invalid Owner ID. Save this as the last ID
140 * allocated and update the global ID mask.
141 */
142 acpi_gbl_owner_id_mask[j] |= (1 << k);
143
144 acpi_gbl_last_owner_id_index = (u8) j;
145 acpi_gbl_next_owner_id_offset = (u8) (k + 1);
146
147 /*
148 * Construct encoded ID from the index and bit position
149 *
150 * Note: Last [j].k (bit 255) is never used and is marked
151 * permanently allocated (prevents +1 overflow)
152 */
153 *owner_id =
154 (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j));
155
156 ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
157 "Allocated OwnerId: %2.2X\n",
158 (unsigned int)*owner_id));
159 goto exit;
160 }
161 }
162
163 acpi_gbl_next_owner_id_offset = 0;
164 }
165
166 /*
167 * All owner_ids have been allocated. This typically should
168 * not happen since the IDs are reused after deallocation. The IDs are
169 * allocated upon table load (one per table) and method execution, and
170 * they are released when a table is unloaded or a method completes
171 * execution.
172 *
173 * If this error happens, there may be very deep nesting of invoked control
174 * methods, or there may be a bug where the IDs are not released.
175 */
176 status = AE_OWNER_ID_LIMIT;
177 ACPI_ERROR((AE_INFO,
178 "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT"));
179
180 exit:
181 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
182 return_ACPI_STATUS(status);
183 }
184
185 /*******************************************************************************
186 *
187 * FUNCTION: acpi_ut_release_owner_id
188 *
189 * PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_iD
190 *
191 * RETURN: None. No error is returned because we are either exiting a
192 * control method or unloading a table. Either way, we would
193 * ignore any error anyway.
194 *
195 * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255
196 *
197 ******************************************************************************/
198
199 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr)
200 {
201 acpi_owner_id owner_id = *owner_id_ptr;
202 acpi_status status;
203 acpi_native_uint index;
204 u32 bit;
205
206 ACPI_FUNCTION_TRACE_U32(ut_release_owner_id, owner_id);
207
208 /* Always clear the input owner_id (zero is an invalid ID) */
209
210 *owner_id_ptr = 0;
211
212 /* Zero is not a valid owner_iD */
213
214 if (owner_id == 0) {
215 ACPI_ERROR((AE_INFO, "Invalid OwnerId: %2.2X", owner_id));
216 return_VOID;
217 }
218
219 /* Mutex for the global ID mask */
220
221 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
222 if (ACPI_FAILURE(status)) {
223 return_VOID;
224 }
225
226 /* Normalize the ID to zero */
227
228 owner_id--;
229
230 /* Decode ID to index/offset pair */
231
232 index = ACPI_DIV_32(owner_id);
233 bit = 1 << ACPI_MOD_32(owner_id);
234
235 /* Free the owner ID only if it is valid */
236
237 if (acpi_gbl_owner_id_mask[index] & bit) {
238 acpi_gbl_owner_id_mask[index] ^= bit;
239 } else {
240 ACPI_ERROR((AE_INFO,
241 "Release of non-allocated OwnerId: %2.2X",
242 owner_id + 1));
243 }
244
245 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
246 return_VOID;
247 }
248
249 /*******************************************************************************
250 *
251 * FUNCTION: acpi_ut_strupr (strupr)
252 *
253 * PARAMETERS: src_string - The source string to convert
254 *
255 * RETURN: None
256 *
257 * DESCRIPTION: Convert string to uppercase
258 *
259 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c
260 *
261 ******************************************************************************/
262
263 void acpi_ut_strupr(char *src_string)
264 {
265 char *string;
266
267 ACPI_FUNCTION_ENTRY();
268
269 if (!src_string) {
270 return;
271 }
272
273 /* Walk entire string, uppercasing the letters */
274
275 for (string = src_string; *string; string++) {
276 *string = (char)ACPI_TOUPPER(*string);
277 }
278
279 return;
280 }
281
282 /*******************************************************************************
283 *
284 * FUNCTION: acpi_ut_print_string
285 *
286 * PARAMETERS: String - Null terminated ASCII string
287 * max_length - Maximum output length
288 *
289 * RETURN: None
290 *
291 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
292 * sequences.
293 *
294 ******************************************************************************/
295
296 void acpi_ut_print_string(char *string, u8 max_length)
297 {
298 u32 i;
299
300 if (!string) {
301 acpi_os_printf("<\"NULL STRING PTR\">");
302 return;
303 }
304
305 acpi_os_printf("\"");
306 for (i = 0; string[i] && (i < max_length); i++) {
307
308 /* Escape sequences */
309
310 switch (string[i]) {
311 case 0x07:
312 acpi_os_printf("\\a"); /* BELL */
313 break;
314
315 case 0x08:
316 acpi_os_printf("\\b"); /* BACKSPACE */
317 break;
318
319 case 0x0C:
320 acpi_os_printf("\\f"); /* FORMFEED */
321 break;
322
323 case 0x0A:
324 acpi_os_printf("\\n"); /* LINEFEED */
325 break;
326
327 case 0x0D:
328 acpi_os_printf("\\r"); /* CARRIAGE RETURN */
329 break;
330
331 case 0x09:
332 acpi_os_printf("\\t"); /* HORIZONTAL TAB */
333 break;
334
335 case 0x0B:
336 acpi_os_printf("\\v"); /* VERTICAL TAB */
337 break;
338
339 case '\'': /* Single Quote */
340 case '\"': /* Double Quote */
341 case '\\': /* Backslash */
342 acpi_os_printf("\\%c", (int)string[i]);
343 break;
344
345 default:
346
347 /* Check for printable character or hex escape */
348
349 if (ACPI_IS_PRINT(string[i])) {
350 /* This is a normal character */
351
352 acpi_os_printf("%c", (int)string[i]);
353 } else {
354 /* All others will be Hex escapes */
355
356 acpi_os_printf("\\x%2.2X", (s32) string[i]);
357 }
358 break;
359 }
360 }
361 acpi_os_printf("\"");
362
363 if (i == max_length && string[i]) {
364 acpi_os_printf("...");
365 }
366 }
367
368 /*******************************************************************************
369 *
370 * FUNCTION: acpi_ut_dword_byte_swap
371 *
372 * PARAMETERS: Value - Value to be converted
373 *
374 * RETURN: u32 integer with bytes swapped
375 *
376 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
377 *
378 ******************************************************************************/
379
380 u32 acpi_ut_dword_byte_swap(u32 value)
381 {
382 union {
383 u32 value;
384 u8 bytes[4];
385 } out;
386 union {
387 u32 value;
388 u8 bytes[4];
389 } in;
390
391 ACPI_FUNCTION_ENTRY();
392
393 in.value = value;
394
395 out.bytes[0] = in.bytes[3];
396 out.bytes[1] = in.bytes[2];
397 out.bytes[2] = in.bytes[1];
398 out.bytes[3] = in.bytes[0];
399
400 return (out.value);
401 }
402
403 /*******************************************************************************
404 *
405 * FUNCTION: acpi_ut_set_integer_width
406 *
407 * PARAMETERS: Revision From DSDT header
408 *
409 * RETURN: None
410 *
411 * DESCRIPTION: Set the global integer bit width based upon the revision
412 * of the DSDT. For Revision 1 and 0, Integers are 32 bits.
413 * For Revision 2 and above, Integers are 64 bits. Yes, this
414 * makes a difference.
415 *
416 ******************************************************************************/
417
418 void acpi_ut_set_integer_width(u8 revision)
419 {
420
421 if (revision <= 1) {
422
423 /* 32-bit case */
424
425 acpi_gbl_integer_bit_width = 32;
426 acpi_gbl_integer_nybble_width = 8;
427 acpi_gbl_integer_byte_width = 4;
428 } else {
429 /* 64-bit case (ACPI 2.0+) */
430
431 acpi_gbl_integer_bit_width = 64;
432 acpi_gbl_integer_nybble_width = 16;
433 acpi_gbl_integer_byte_width = 8;
434 }
435 }
436
437 #ifdef ACPI_DEBUG_OUTPUT
438 /*******************************************************************************
439 *
440 * FUNCTION: acpi_ut_display_init_pathname
441 *
442 * PARAMETERS: Type - Object type of the node
443 * obj_handle - Handle whose pathname will be displayed
444 * Path - Additional path string to be appended.
445 * (NULL if no extra path)
446 *
447 * RETURN: acpi_status
448 *
449 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY
450 *
451 ******************************************************************************/
452
453 void
454 acpi_ut_display_init_pathname(u8 type,
455 struct acpi_namespace_node *obj_handle,
456 char *path)
457 {
458 acpi_status status;
459 struct acpi_buffer buffer;
460
461 ACPI_FUNCTION_ENTRY();
462
463 /* Only print the path if the appropriate debug level is enabled */
464
465 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
466 return;
467 }
468
469 /* Get the full pathname to the node */
470
471 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
472 status = acpi_ns_handle_to_pathname(obj_handle, &buffer);
473 if (ACPI_FAILURE(status)) {
474 return;
475 }
476
477 /* Print what we're doing */
478
479 switch (type) {
480 case ACPI_TYPE_METHOD:
481 acpi_os_printf("Executing ");
482 break;
483
484 default:
485 acpi_os_printf("Initializing ");
486 break;
487 }
488
489 /* Print the object type and pathname */
490
491 acpi_os_printf("%-12s %s",
492 acpi_ut_get_type_name(type), (char *)buffer.pointer);
493
494 /* Extra path is used to append names like _STA, _INI, etc. */
495
496 if (path) {
497 acpi_os_printf(".%s", path);
498 }
499 acpi_os_printf("\n");
500
501 ACPI_FREE(buffer.pointer);
502 }
503 #endif
504
505 /*******************************************************************************
506 *
507 * FUNCTION: acpi_ut_valid_acpi_char
508 *
509 * PARAMETERS: Char - The character to be examined
510 * Position - Byte position (0-3)
511 *
512 * RETURN: TRUE if the character is valid, FALSE otherwise
513 *
514 * DESCRIPTION: Check for a valid ACPI character. Must be one of:
515 * 1) Upper case alpha
516 * 2) numeric
517 * 3) underscore
518 *
519 * We allow a '!' as the last character because of the ASF! table
520 *
521 ******************************************************************************/
522
523 u8 acpi_ut_valid_acpi_char(char character, acpi_native_uint position)
524 {
525
526 if (!((character >= 'A' && character <= 'Z') ||
527 (character >= '0' && character <= '9') || (character == '_'))) {
528
529 /* Allow a '!' in the last position */
530
531 if (character == '!' && position == 3) {
532 return (TRUE);
533 }
534
535 return (FALSE);
536 }
537
538 return (TRUE);
539 }
540
541 /*******************************************************************************
542 *
543 * FUNCTION: acpi_ut_valid_acpi_name
544 *
545 * PARAMETERS: Name - The name to be examined
546 *
547 * RETURN: TRUE if the name is valid, FALSE otherwise
548 *
549 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
550 * 1) Upper case alpha
551 * 2) numeric
552 * 3) underscore
553 *
554 ******************************************************************************/
555
556 u8 acpi_ut_valid_acpi_name(u32 name)
557 {
558 acpi_native_uint i;
559
560 ACPI_FUNCTION_ENTRY();
561
562 for (i = 0; i < ACPI_NAME_SIZE; i++) {
563 if (!acpi_ut_valid_acpi_char
564 ((ACPI_CAST_PTR(char, &name))[i], i)) {
565 return (FALSE);
566 }
567 }
568
569 return (TRUE);
570 }
571
572 /*******************************************************************************
573 *
574 * FUNCTION: acpi_ut_repair_name
575 *
576 * PARAMETERS: Name - The ACPI name to be repaired
577 *
578 * RETURN: Repaired version of the name
579 *
580 * DESCRIPTION: Repair an ACPI name: Change invalid characters to '*' and
581 * return the new name.
582 *
583 ******************************************************************************/
584
585 acpi_name acpi_ut_repair_name(acpi_name name)
586 {
587 char *name_ptr = ACPI_CAST_PTR(char, &name);
588 char new_name[ACPI_NAME_SIZE];
589 acpi_native_uint i;
590
591 for (i = 0; i < ACPI_NAME_SIZE; i++) {
592 new_name[i] = name_ptr[i];
593
594 /*
595 * Replace a bad character with something printable, yet technically
596 * still invalid. This prevents any collisions with existing "good"
597 * names in the namespace.
598 */
599 if (!acpi_ut_valid_acpi_char(name_ptr[i], i)) {
600 new_name[i] = '*';
601 }
602 }
603
604 return (*ACPI_CAST_PTR(u32, new_name));
605 }
606
607 /*******************************************************************************
608 *
609 * FUNCTION: acpi_ut_strtoul64
610 *
611 * PARAMETERS: String - Null terminated string
612 * Base - Radix of the string: 16 or ACPI_ANY_BASE;
613 * ACPI_ANY_BASE means 'in behalf of to_integer'
614 * ret_integer - Where the converted integer is returned
615 *
616 * RETURN: Status and Converted value
617 *
618 * DESCRIPTION: Convert a string into an unsigned value. Performs either a
619 * 32-bit or 64-bit conversion, depending on the current mode
620 * of the interpreter.
621 * NOTE: Does not support Octal strings, not needed.
622 *
623 ******************************************************************************/
624
625 acpi_status
626 acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
627 {
628 u32 this_digit = 0;
629 acpi_integer return_value = 0;
630 acpi_integer quotient;
631 acpi_integer dividend;
632 u32 to_integer_op = (base == ACPI_ANY_BASE);
633 u32 mode32 = (acpi_gbl_integer_byte_width == 4);
634 u8 valid_digits = 0;
635 u8 sign_of0x = 0;
636 u8 term = 0;
637
638 ACPI_FUNCTION_TRACE_STR(ut_stroul64, string);
639
640 switch (base) {
641 case ACPI_ANY_BASE:
642 case 16:
643 break;
644
645 default:
646 /* Invalid Base */
647 return_ACPI_STATUS(AE_BAD_PARAMETER);
648 }
649
650 if (!string) {
651 goto error_exit;
652 }
653
654 /* Skip over any white space in the buffer */
655
656 while ((*string) && (ACPI_IS_SPACE(*string) || *string == '\t')) {
657 string++;
658 }
659
660 if (to_integer_op) {
661 /*
662 * Base equal to ACPI_ANY_BASE means 'to_integer operation case'.
663 * We need to determine if it is decimal or hexadecimal.
664 */
665 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
666 sign_of0x = 1;
667 base = 16;
668
669 /* Skip over the leading '0x' */
670 string += 2;
671 } else {
672 base = 10;
673 }
674 }
675
676 /* Any string left? Check that '0x' is not followed by white space. */
677
678 if (!(*string) || ACPI_IS_SPACE(*string) || *string == '\t') {
679 if (to_integer_op) {
680 goto error_exit;
681 } else {
682 goto all_done;
683 }
684 }
685
686 /*
687 * Perform a 32-bit or 64-bit conversion, depending upon the current
688 * execution mode of the interpreter
689 */
690 dividend = (mode32) ? ACPI_UINT32_MAX : ACPI_UINT64_MAX;
691
692 /* Main loop: convert the string to a 32- or 64-bit integer */
693
694 while (*string) {
695 if (ACPI_IS_DIGIT(*string)) {
696
697 /* Convert ASCII 0-9 to Decimal value */
698
699 this_digit = ((u8) * string) - '0';
700 } else if (base == 10) {
701
702 /* Digit is out of range; possible in to_integer case only */
703
704 term = 1;
705 } else {
706 this_digit = (u8) ACPI_TOUPPER(*string);
707 if (ACPI_IS_XDIGIT((char)this_digit)) {
708
709 /* Convert ASCII Hex char to value */
710
711 this_digit = this_digit - 'A' + 10;
712 } else {
713 term = 1;
714 }
715 }
716
717 if (term) {
718 if (to_integer_op) {
719 goto error_exit;
720 } else {
721 break;
722 }
723 } else if ((valid_digits == 0) && (this_digit == 0)
724 && !sign_of0x) {
725
726 /* Skip zeros */
727 string++;
728 continue;
729 }
730
731 valid_digits++;
732
733 if (sign_of0x
734 && ((valid_digits > 16)
735 || ((valid_digits > 8) && mode32))) {
736 /*
737 * This is to_integer operation case.
738 * No any restrictions for string-to-integer conversion,
739 * see ACPI spec.
740 */
741 goto error_exit;
742 }
743
744 /* Divide the digit into the correct position */
745
746 (void)
747 acpi_ut_short_divide((dividend - (acpi_integer) this_digit),
748 base, &quotient, NULL);
749
750 if (return_value > quotient) {
751 if (to_integer_op) {
752 goto error_exit;
753 } else {
754 break;
755 }
756 }
757
758 return_value *= base;
759 return_value += this_digit;
760 string++;
761 }
762
763 /* All done, normal exit */
764
765 all_done:
766
767 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Converted value: %8.8X%8.8X\n",
768 ACPI_FORMAT_UINT64(return_value)));
769
770 *ret_integer = return_value;
771 return_ACPI_STATUS(AE_OK);
772
773 error_exit:
774 /* Base was set/validated above */
775
776 if (base == 10) {
777 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
778 } else {
779 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
780 }
781 }
782
783 /*******************************************************************************
784 *
785 * FUNCTION: acpi_ut_create_update_state_and_push
786 *
787 * PARAMETERS: Object - Object to be added to the new state
788 * Action - Increment/Decrement
789 * state_list - List the state will be added to
790 *
791 * RETURN: Status
792 *
793 * DESCRIPTION: Create a new state and push it
794 *
795 ******************************************************************************/
796
797 acpi_status
798 acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
799 u16 action,
800 union acpi_generic_state **state_list)
801 {
802 union acpi_generic_state *state;
803
804 ACPI_FUNCTION_ENTRY();
805
806 /* Ignore null objects; these are expected */
807
808 if (!object) {
809 return (AE_OK);
810 }
811
812 state = acpi_ut_create_update_state(object, action);
813 if (!state) {
814 return (AE_NO_MEMORY);
815 }
816
817 acpi_ut_push_generic_state(state_list, state);
818 return (AE_OK);
819 }
820
821 /*******************************************************************************
822 *
823 * FUNCTION: acpi_ut_walk_package_tree
824 *
825 * PARAMETERS: source_object - The package to walk
826 * target_object - Target object (if package is being copied)
827 * walk_callback - Called once for each package element
828 * Context - Passed to the callback function
829 *
830 * RETURN: Status
831 *
832 * DESCRIPTION: Walk through a package
833 *
834 ******************************************************************************/
835
836 acpi_status
837 acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
838 void *target_object,
839 acpi_pkg_callback walk_callback, void *context)
840 {
841 acpi_status status = AE_OK;
842 union acpi_generic_state *state_list = NULL;
843 union acpi_generic_state *state;
844 u32 this_index;
845 union acpi_operand_object *this_source_obj;
846
847 ACPI_FUNCTION_TRACE(ut_walk_package_tree);
848
849 state = acpi_ut_create_pkg_state(source_object, target_object, 0);
850 if (!state) {
851 return_ACPI_STATUS(AE_NO_MEMORY);
852 }
853
854 while (state) {
855
856 /* Get one element of the package */
857
858 this_index = state->pkg.index;
859 this_source_obj = (union acpi_operand_object *)
860 state->pkg.source_object->package.elements[this_index];
861
862 /*
863 * Check for:
864 * 1) An uninitialized package element. It is completely
865 * legal to declare a package and leave it uninitialized
866 * 2) Not an internal object - can be a namespace node instead
867 * 3) Any type other than a package. Packages are handled in else
868 * case below.
869 */
870 if ((!this_source_obj) ||
871 (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
872 ACPI_DESC_TYPE_OPERAND)
873 || (ACPI_GET_OBJECT_TYPE(this_source_obj) !=
874 ACPI_TYPE_PACKAGE)) {
875 status =
876 walk_callback(ACPI_COPY_TYPE_SIMPLE,
877 this_source_obj, state, context);
878 if (ACPI_FAILURE(status)) {
879 return_ACPI_STATUS(status);
880 }
881
882 state->pkg.index++;
883 while (state->pkg.index >=
884 state->pkg.source_object->package.count) {
885 /*
886 * We've handled all of the objects at this level, This means
887 * that we have just completed a package. That package may
888 * have contained one or more packages itself.
889 *
890 * Delete this state and pop the previous state (package).
891 */
892 acpi_ut_delete_generic_state(state);
893 state = acpi_ut_pop_generic_state(&state_list);
894
895 /* Finished when there are no more states */
896
897 if (!state) {
898 /*
899 * We have handled all of the objects in the top level
900 * package just add the length of the package objects
901 * and exit
902 */
903 return_ACPI_STATUS(AE_OK);
904 }
905
906 /*
907 * Go back up a level and move the index past the just
908 * completed package object.
909 */
910 state->pkg.index++;
911 }
912 } else {
913 /* This is a subobject of type package */
914
915 status =
916 walk_callback(ACPI_COPY_TYPE_PACKAGE,
917 this_source_obj, state, context);
918 if (ACPI_FAILURE(status)) {
919 return_ACPI_STATUS(status);
920 }
921
922 /*
923 * Push the current state and create a new one
924 * The callback above returned a new target package object.
925 */
926 acpi_ut_push_generic_state(&state_list, state);
927 state = acpi_ut_create_pkg_state(this_source_obj,
928 state->pkg.
929 this_target_obj, 0);
930 if (!state) {
931 return_ACPI_STATUS(AE_NO_MEMORY);
932 }
933 }
934 }
935
936 /* We should never get here */
937
938 return_ACPI_STATUS(AE_AML_INTERNAL);
939 }
940
941 /*******************************************************************************
942 *
943 * FUNCTION: acpi_ut_error, acpi_ut_warning, acpi_ut_info
944 *
945 * PARAMETERS: module_name - Caller's module name (for error output)
946 * line_number - Caller's line number (for error output)
947 * Format - Printf format string + additional args
948 *
949 * RETURN: None
950 *
951 * DESCRIPTION: Print message with module/line/version info
952 *
953 ******************************************************************************/
954
955 void ACPI_INTERNAL_VAR_XFACE
956 acpi_ut_error(char *module_name, u32 line_number, char *format, ...)
957 {
958 va_list args;
959
960 acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
961
962 va_start(args, format);
963 acpi_os_vprintf(format, args);
964 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
965 }
966
967 void ACPI_INTERNAL_VAR_XFACE
968 acpi_ut_exception(char *module_name,
969 u32 line_number, acpi_status status, char *format, ...)
970 {
971 va_list args;
972
973 acpi_os_printf("ACPI Exception (%s-%04d): %s, ", module_name,
974 line_number, acpi_format_exception(status));
975
976 va_start(args, format);
977 acpi_os_vprintf(format, args);
978 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
979 }
980 EXPORT_SYMBOL(acpi_ut_exception);
981
982 void ACPI_INTERNAL_VAR_XFACE
983 acpi_ut_warning(char *module_name, u32 line_number, char *format, ...)
984 {
985 va_list args;
986
987 acpi_os_printf("ACPI Warning (%s-%04d): ", module_name, line_number);
988
989 va_start(args, format);
990 acpi_os_vprintf(format, args);
991 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
992 }
993
994 void ACPI_INTERNAL_VAR_XFACE
995 acpi_ut_info(char *module_name, u32 line_number, char *format, ...)
996 {
997 va_list args;
998
999 acpi_os_printf("ACPI (%s-%04d): ", module_name, line_number);
1000
1001 va_start(args, format);
1002 acpi_os_vprintf(format, args);
1003 acpi_os_printf(" [%X]\n", ACPI_CA_VERSION);
1004 }
Linux kernel - Deliverables
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