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[ACPI] ACPICA 20060113
[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 <acpi/acpi.h>
45 #include <acpi/acnamesp.h>
46
47 #define _COMPONENT ACPI_UTILITIES
48 ACPI_MODULE_NAME("utmisc")
49
50 /*******************************************************************************
51 *
52 * FUNCTION: acpi_ut_allocate_owner_id
53 *
54 * PARAMETERS: owner_id - Where the new owner ID is returned
55 *
56 * RETURN: Status
57 *
58 * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
59 * track objects created by the table or method, to be deleted
60 * when the method exits or the table is unloaded.
61 *
62 ******************************************************************************/
63 acpi_status acpi_ut_allocate_owner_id(acpi_owner_id * owner_id)
64 {
65 acpi_native_uint i;
66 acpi_native_uint j;
67 acpi_native_uint k;
68 acpi_status status;
69
70 ACPI_FUNCTION_TRACE("ut_allocate_owner_id");
71
72 /* Guard against multiple allocations of ID to the same location */
73
74 if (*owner_id) {
75 ACPI_REPORT_ERROR(("Owner ID [%2.2X] already exists\n",
76 *owner_id));
77 return_ACPI_STATUS(AE_ALREADY_EXISTS);
78 }
79
80 /* Mutex for the global ID mask */
81
82 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
83 if (ACPI_FAILURE(status)) {
84 return_ACPI_STATUS(status);
85 }
86
87 /*
88 * Find a free owner ID, cycle through all possible IDs on repeated
89 * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index may have
90 * to be scanned twice.
91 */
92 for (i = 0, j = acpi_gbl_last_owner_id_index;
93 i < (ACPI_NUM_OWNERID_MASKS + 1); i++, j++) {
94 if (j >= ACPI_NUM_OWNERID_MASKS) {
95 j = 0; /* Wraparound to start of mask array */
96 }
97
98 for (k = acpi_gbl_next_owner_id_offset; k < 32; k++) {
99 if (acpi_gbl_owner_id_mask[j] == ACPI_UINT32_MAX) {
100 /* There are no free IDs in this mask */
101
102 break;
103 }
104
105 if (!(acpi_gbl_owner_id_mask[j] & (1 << k))) {
106 /*
107 * Found a free ID. The actual ID is the bit index plus one,
108 * making zero an invalid Owner ID. Save this as the last ID
109 * allocated and update the global ID mask.
110 */
111 acpi_gbl_owner_id_mask[j] |= (1 << k);
112
113 acpi_gbl_last_owner_id_index = (u8) j;
114 acpi_gbl_next_owner_id_offset = (u8) (k + 1);
115
116 /*
117 * Construct encoded ID from the index and bit position
118 *
119 * Note: Last [j].k (bit 255) is never used and is marked
120 * permanently allocated (prevents +1 overflow)
121 */
122 *owner_id =
123 (acpi_owner_id) ((k + 1) + ACPI_MUL_32(j));
124
125 ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
126 "Allocated owner_id: %2.2X\n",
127 (unsigned int)*owner_id));
128 goto exit;
129 }
130 }
131
132 acpi_gbl_next_owner_id_offset = 0;
133 }
134
135 /*
136 * All owner_ids have been allocated. This typically should
137 * not happen since the IDs are reused after deallocation. The IDs are
138 * allocated upon table load (one per table) and method execution, and
139 * they are released when a table is unloaded or a method completes
140 * execution.
141 *
142 * If this error happens, there may be very deep nesting of invoked control
143 * methods, or there may be a bug where the IDs are not released.
144 */
145 status = AE_OWNER_ID_LIMIT;
146 ACPI_REPORT_ERROR(("Could not allocate new owner_id (255 max), AE_OWNER_ID_LIMIT\n"));
147
148 exit:
149 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
150 return_ACPI_STATUS(status);
151 }
152
153 /*******************************************************************************
154 *
155 * FUNCTION: acpi_ut_release_owner_id
156 *
157 * PARAMETERS: owner_id_ptr - Pointer to a previously allocated owner_iD
158 *
159 * RETURN: None. No error is returned because we are either exiting a
160 * control method or unloading a table. Either way, we would
161 * ignore any error anyway.
162 *
163 * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255
164 *
165 ******************************************************************************/
166
167 void acpi_ut_release_owner_id(acpi_owner_id * owner_id_ptr)
168 {
169 acpi_owner_id owner_id = *owner_id_ptr;
170 acpi_status status;
171 acpi_native_uint index;
172 u32 bit;
173
174 ACPI_FUNCTION_TRACE_U32("ut_release_owner_id", owner_id);
175
176 /* Always clear the input owner_id (zero is an invalid ID) */
177
178 *owner_id_ptr = 0;
179
180 /* Zero is not a valid owner_iD */
181
182 if (owner_id == 0) {
183 ACPI_REPORT_ERROR(("Invalid owner_id: %2.2X\n", owner_id));
184 return_VOID;
185 }
186
187 /* Mutex for the global ID mask */
188
189 status = acpi_ut_acquire_mutex(ACPI_MTX_CACHES);
190 if (ACPI_FAILURE(status)) {
191 return_VOID;
192 }
193
194 /* Normalize the ID to zero */
195
196 owner_id--;
197
198 /* Decode ID to index/offset pair */
199
200 index = ACPI_DIV_32(owner_id);
201 bit = 1 << ACPI_MOD_32(owner_id);
202
203 /* Free the owner ID only if it is valid */
204
205 if (acpi_gbl_owner_id_mask[index] & bit) {
206 acpi_gbl_owner_id_mask[index] ^= bit;
207 } else {
208 ACPI_REPORT_ERROR(("Release of non-allocated owner_id: %2.2X\n",
209 owner_id + 1));
210 }
211
212 (void)acpi_ut_release_mutex(ACPI_MTX_CACHES);
213 return_VOID;
214 }
215
216 /*******************************************************************************
217 *
218 * FUNCTION: acpi_ut_strupr (strupr)
219 *
220 * PARAMETERS: src_string - The source string to convert
221 *
222 * RETURN: None
223 *
224 * DESCRIPTION: Convert string to uppercase
225 *
226 * NOTE: This is not a POSIX function, so it appears here, not in utclib.c
227 *
228 ******************************************************************************/
229
230 void acpi_ut_strupr(char *src_string)
231 {
232 char *string;
233
234 ACPI_FUNCTION_ENTRY();
235
236 if (!src_string) {
237 return;
238 }
239
240 /* Walk entire string, uppercasing the letters */
241
242 for (string = src_string; *string; string++) {
243 *string = (char)ACPI_TOUPPER(*string);
244 }
245
246 return;
247 }
248
249 /*******************************************************************************
250 *
251 * FUNCTION: acpi_ut_print_string
252 *
253 * PARAMETERS: String - Null terminated ASCII string
254 * max_length - Maximum output length
255 *
256 * RETURN: None
257 *
258 * DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
259 * sequences.
260 *
261 ******************************************************************************/
262
263 void acpi_ut_print_string(char *string, u8 max_length)
264 {
265 u32 i;
266
267 if (!string) {
268 acpi_os_printf("<\"NULL STRING PTR\">");
269 return;
270 }
271
272 acpi_os_printf("\"");
273 for (i = 0; string[i] && (i < max_length); i++) {
274 /* Escape sequences */
275
276 switch (string[i]) {
277 case 0x07:
278 acpi_os_printf("\\a"); /* BELL */
279 break;
280
281 case 0x08:
282 acpi_os_printf("\\b"); /* BACKSPACE */
283 break;
284
285 case 0x0C:
286 acpi_os_printf("\\f"); /* FORMFEED */
287 break;
288
289 case 0x0A:
290 acpi_os_printf("\\n"); /* LINEFEED */
291 break;
292
293 case 0x0D:
294 acpi_os_printf("\\r"); /* CARRIAGE RETURN */
295 break;
296
297 case 0x09:
298 acpi_os_printf("\\t"); /* HORIZONTAL TAB */
299 break;
300
301 case 0x0B:
302 acpi_os_printf("\\v"); /* VERTICAL TAB */
303 break;
304
305 case '\'': /* Single Quote */
306 case '\"': /* Double Quote */
307 case '\\': /* Backslash */
308 acpi_os_printf("\\%c", (int)string[i]);
309 break;
310
311 default:
312
313 /* Check for printable character or hex escape */
314
315 if (ACPI_IS_PRINT(string[i])) {
316 /* This is a normal character */
317
318 acpi_os_printf("%c", (int)string[i]);
319 } else {
320 /* All others will be Hex escapes */
321
322 acpi_os_printf("\\x%2.2X", (s32) string[i]);
323 }
324 break;
325 }
326 }
327 acpi_os_printf("\"");
328
329 if (i == max_length && string[i]) {
330 acpi_os_printf("...");
331 }
332 }
333
334 /*******************************************************************************
335 *
336 * FUNCTION: acpi_ut_dword_byte_swap
337 *
338 * PARAMETERS: Value - Value to be converted
339 *
340 * RETURN: u32 integer with bytes swapped
341 *
342 * DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
343 *
344 ******************************************************************************/
345
346 u32 acpi_ut_dword_byte_swap(u32 value)
347 {
348 union {
349 u32 value;
350 u8 bytes[4];
351 } out;
352 union {
353 u32 value;
354 u8 bytes[4];
355 } in;
356
357 ACPI_FUNCTION_ENTRY();
358
359 in.value = value;
360
361 out.bytes[0] = in.bytes[3];
362 out.bytes[1] = in.bytes[2];
363 out.bytes[2] = in.bytes[1];
364 out.bytes[3] = in.bytes[0];
365
366 return (out.value);
367 }
368
369 /*******************************************************************************
370 *
371 * FUNCTION: acpi_ut_set_integer_width
372 *
373 * PARAMETERS: Revision From DSDT header
374 *
375 * RETURN: None
376 *
377 * DESCRIPTION: Set the global integer bit width based upon the revision
378 * of the DSDT. For Revision 1 and 0, Integers are 32 bits.
379 * For Revision 2 and above, Integers are 64 bits. Yes, this
380 * makes a difference.
381 *
382 ******************************************************************************/
383
384 void acpi_ut_set_integer_width(u8 revision)
385 {
386
387 if (revision <= 1) {
388 acpi_gbl_integer_bit_width = 32;
389 acpi_gbl_integer_nybble_width = 8;
390 acpi_gbl_integer_byte_width = 4;
391 } else {
392 acpi_gbl_integer_bit_width = 64;
393 acpi_gbl_integer_nybble_width = 16;
394 acpi_gbl_integer_byte_width = 8;
395 }
396 }
397
398 #ifdef ACPI_DEBUG_OUTPUT
399 /*******************************************************************************
400 *
401 * FUNCTION: acpi_ut_display_init_pathname
402 *
403 * PARAMETERS: Type - Object type of the node
404 * obj_handle - Handle whose pathname will be displayed
405 * Path - Additional path string to be appended.
406 * (NULL if no extra path)
407 *
408 * RETURN: acpi_status
409 *
410 * DESCRIPTION: Display full pathname of an object, DEBUG ONLY
411 *
412 ******************************************************************************/
413
414 void
415 acpi_ut_display_init_pathname(u8 type,
416 struct acpi_namespace_node *obj_handle,
417 char *path)
418 {
419 acpi_status status;
420 struct acpi_buffer buffer;
421
422 ACPI_FUNCTION_ENTRY();
423
424 /* Only print the path if the appropriate debug level is enabled */
425
426 if (!(acpi_dbg_level & ACPI_LV_INIT_NAMES)) {
427 return;
428 }
429
430 /* Get the full pathname to the node */
431
432 buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
433 status = acpi_ns_handle_to_pathname(obj_handle, &buffer);
434 if (ACPI_FAILURE(status)) {
435 return;
436 }
437
438 /* Print what we're doing */
439
440 switch (type) {
441 case ACPI_TYPE_METHOD:
442 acpi_os_printf("Executing ");
443 break;
444
445 default:
446 acpi_os_printf("Initializing ");
447 break;
448 }
449
450 /* Print the object type and pathname */
451
452 acpi_os_printf("%-12s %s",
453 acpi_ut_get_type_name(type), (char *)buffer.pointer);
454
455 /* Extra path is used to append names like _STA, _INI, etc. */
456
457 if (path) {
458 acpi_os_printf(".%s", path);
459 }
460 acpi_os_printf("\n");
461
462 ACPI_MEM_FREE(buffer.pointer);
463 }
464 #endif
465
466 /*******************************************************************************
467 *
468 * FUNCTION: acpi_ut_valid_acpi_name
469 *
470 * PARAMETERS: Name - The name to be examined
471 *
472 * RETURN: TRUE if the name is valid, FALSE otherwise
473 *
474 * DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
475 * 1) Upper case alpha
476 * 2) numeric
477 * 3) underscore
478 *
479 ******************************************************************************/
480
481 u8 acpi_ut_valid_acpi_name(u32 name)
482 {
483 char *name_ptr = (char *)&name;
484 char character;
485 acpi_native_uint i;
486
487 ACPI_FUNCTION_ENTRY();
488
489 for (i = 0; i < ACPI_NAME_SIZE; i++) {
490 character = *name_ptr;
491 name_ptr++;
492
493 if (!((character == '_') ||
494 (character >= 'A' && character <= 'Z') ||
495 (character >= '0' && character <= '9'))) {
496 return (FALSE);
497 }
498 }
499
500 return (TRUE);
501 }
502
503 /*******************************************************************************
504 *
505 * FUNCTION: acpi_ut_valid_acpi_character
506 *
507 * PARAMETERS: Character - The character to be examined
508 *
509 * RETURN: 1 if Character may appear in a name, else 0
510 *
511 * DESCRIPTION: Check for a printable character
512 *
513 ******************************************************************************/
514
515 u8 acpi_ut_valid_acpi_character(char character)
516 {
517
518 ACPI_FUNCTION_ENTRY();
519
520 return ((u8) ((character == '_') ||
521 (character >= 'A' && character <= 'Z') ||
522 (character >= '0' && character <= '9')));
523 }
524
525 /*******************************************************************************
526 *
527 * FUNCTION: acpi_ut_strtoul64
528 *
529 * PARAMETERS: String - Null terminated string
530 * Base - Radix of the string: 10, 16, or ACPI_ANY_BASE
531 * ret_integer - Where the converted integer is returned
532 *
533 * RETURN: Status and Converted value
534 *
535 * DESCRIPTION: Convert a string into an unsigned value.
536 * NOTE: Does not support Octal strings, not needed.
537 *
538 ******************************************************************************/
539
540 acpi_status
541 acpi_ut_strtoul64(char *string, u32 base, acpi_integer * ret_integer)
542 {
543 u32 this_digit = 0;
544 acpi_integer return_value = 0;
545 acpi_integer quotient;
546
547 ACPI_FUNCTION_TRACE("ut_stroul64");
548
549 if ((!string) || !(*string)) {
550 goto error_exit;
551 }
552
553 switch (base) {
554 case ACPI_ANY_BASE:
555 case 10:
556 case 16:
557 break;
558
559 default:
560 /* Invalid Base */
561 return_ACPI_STATUS(AE_BAD_PARAMETER);
562 }
563
564 /* Skip over any white space in the buffer */
565
566 while (ACPI_IS_SPACE(*string) || *string == '\t') {
567 string++;
568 }
569
570 /*
571 * If the input parameter Base is zero, then we need to
572 * determine if it is decimal or hexadecimal:
573 */
574 if (base == 0) {
575 if ((*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
576 base = 16;
577 string += 2;
578 } else {
579 base = 10;
580 }
581 }
582
583 /*
584 * For hexadecimal base, skip over the leading
585 * 0 or 0x, if they are present.
586 */
587 if ((base == 16) &&
588 (*string == '0') && (ACPI_TOLOWER(*(string + 1)) == 'x')) {
589 string += 2;
590 }
591
592 /* Any string left? */
593
594 if (!(*string)) {
595 goto error_exit;
596 }
597
598 /* Main loop: convert the string to a 64-bit integer */
599
600 while (*string) {
601 if (ACPI_IS_DIGIT(*string)) {
602 /* Convert ASCII 0-9 to Decimal value */
603
604 this_digit = ((u8) * string) - '0';
605 } else {
606 if (base == 10) {
607 /* Digit is out of range */
608
609 goto error_exit;
610 }
611
612 this_digit = (u8) ACPI_TOUPPER(*string);
613 if (ACPI_IS_XDIGIT((char)this_digit)) {
614 /* Convert ASCII Hex char to value */
615
616 this_digit = this_digit - 'A' + 10;
617 } else {
618 /*
619 * We allow non-hex chars, just stop now, same as end-of-string.
620 * See ACPI spec, string-to-integer conversion.
621 */
622 break;
623 }
624 }
625
626 /* Divide the digit into the correct position */
627
628 (void)
629 acpi_ut_short_divide((ACPI_INTEGER_MAX -
630 (acpi_integer) this_digit), base,
631 &quotient, NULL);
632 if (return_value > quotient) {
633 goto error_exit;
634 }
635
636 return_value *= base;
637 return_value += this_digit;
638 string++;
639 }
640
641 /* All done, normal exit */
642
643 *ret_integer = return_value;
644 return_ACPI_STATUS(AE_OK);
645
646 error_exit:
647 /* Base was set/validated above */
648
649 if (base == 10) {
650 return_ACPI_STATUS(AE_BAD_DECIMAL_CONSTANT);
651 } else {
652 return_ACPI_STATUS(AE_BAD_HEX_CONSTANT);
653 }
654 }
655
656 /*******************************************************************************
657 *
658 * FUNCTION: acpi_ut_create_update_state_and_push
659 *
660 * PARAMETERS: Object - Object to be added to the new state
661 * Action - Increment/Decrement
662 * state_list - List the state will be added to
663 *
664 * RETURN: Status
665 *
666 * DESCRIPTION: Create a new state and push it
667 *
668 ******************************************************************************/
669
670 acpi_status
671 acpi_ut_create_update_state_and_push(union acpi_operand_object *object,
672 u16 action,
673 union acpi_generic_state **state_list)
674 {
675 union acpi_generic_state *state;
676
677 ACPI_FUNCTION_ENTRY();
678
679 /* Ignore null objects; these are expected */
680
681 if (!object) {
682 return (AE_OK);
683 }
684
685 state = acpi_ut_create_update_state(object, action);
686 if (!state) {
687 return (AE_NO_MEMORY);
688 }
689
690 acpi_ut_push_generic_state(state_list, state);
691 return (AE_OK);
692 }
693
694 /*******************************************************************************
695 *
696 * FUNCTION: acpi_ut_walk_package_tree
697 *
698 * PARAMETERS: source_object - The package to walk
699 * target_object - Target object (if package is being copied)
700 * walk_callback - Called once for each package element
701 * Context - Passed to the callback function
702 *
703 * RETURN: Status
704 *
705 * DESCRIPTION: Walk through a package
706 *
707 ******************************************************************************/
708
709 acpi_status
710 acpi_ut_walk_package_tree(union acpi_operand_object * source_object,
711 void *target_object,
712 acpi_pkg_callback walk_callback, void *context)
713 {
714 acpi_status status = AE_OK;
715 union acpi_generic_state *state_list = NULL;
716 union acpi_generic_state *state;
717 u32 this_index;
718 union acpi_operand_object *this_source_obj;
719
720 ACPI_FUNCTION_TRACE("ut_walk_package_tree");
721
722 state = acpi_ut_create_pkg_state(source_object, target_object, 0);
723 if (!state) {
724 return_ACPI_STATUS(AE_NO_MEMORY);
725 }
726
727 while (state) {
728 /* Get one element of the package */
729
730 this_index = state->pkg.index;
731 this_source_obj = (union acpi_operand_object *)
732 state->pkg.source_object->package.elements[this_index];
733
734 /*
735 * Check for:
736 * 1) An uninitialized package element. It is completely
737 * legal to declare a package and leave it uninitialized
738 * 2) Not an internal object - can be a namespace node instead
739 * 3) Any type other than a package. Packages are handled in else
740 * case below.
741 */
742 if ((!this_source_obj) ||
743 (ACPI_GET_DESCRIPTOR_TYPE(this_source_obj) !=
744 ACPI_DESC_TYPE_OPERAND)
745 || (ACPI_GET_OBJECT_TYPE(this_source_obj) !=
746 ACPI_TYPE_PACKAGE)) {
747 status =
748 walk_callback(ACPI_COPY_TYPE_SIMPLE,
749 this_source_obj, state, context);
750 if (ACPI_FAILURE(status)) {
751 return_ACPI_STATUS(status);
752 }
753
754 state->pkg.index++;
755 while (state->pkg.index >=
756 state->pkg.source_object->package.count) {
757 /*
758 * We've handled all of the objects at this level, This means
759 * that we have just completed a package. That package may
760 * have contained one or more packages itself.
761 *
762 * Delete this state and pop the previous state (package).
763 */
764 acpi_ut_delete_generic_state(state);
765 state = acpi_ut_pop_generic_state(&state_list);
766
767 /* Finished when there are no more states */
768
769 if (!state) {
770 /*
771 * We have handled all of the objects in the top level
772 * package just add the length of the package objects
773 * and exit
774 */
775 return_ACPI_STATUS(AE_OK);
776 }
777
778 /*
779 * Go back up a level and move the index past the just
780 * completed package object.
781 */
782 state->pkg.index++;
783 }
784 } else {
785 /* This is a subobject of type package */
786
787 status =
788 walk_callback(ACPI_COPY_TYPE_PACKAGE,
789 this_source_obj, state, context);
790 if (ACPI_FAILURE(status)) {
791 return_ACPI_STATUS(status);
792 }
793
794 /*
795 * Push the current state and create a new one
796 * The callback above returned a new target package object.
797 */
798 acpi_ut_push_generic_state(&state_list, state);
799 state = acpi_ut_create_pkg_state(this_source_obj,
800 state->pkg.
801 this_target_obj, 0);
802 if (!state) {
803 return_ACPI_STATUS(AE_NO_MEMORY);
804 }
805 }
806 }
807
808 /* We should never get here */
809
810 return_ACPI_STATUS(AE_AML_INTERNAL);
811 }
812
813 /*******************************************************************************
814 *
815 * FUNCTION: acpi_ut_generate_checksum
816 *
817 * PARAMETERS: Buffer - Buffer to be scanned
818 * Length - number of bytes to examine
819 *
820 * RETURN: The generated checksum
821 *
822 * DESCRIPTION: Generate a checksum on a raw buffer
823 *
824 ******************************************************************************/
825
826 u8 acpi_ut_generate_checksum(u8 * buffer, u32 length)
827 {
828 u32 i;
829 signed char sum = 0;
830
831 for (i = 0; i < length; i++) {
832 sum = (signed char)(sum + buffer[i]);
833 }
834
835 return ((u8) (0 - sum));
836 }
837
838 /*******************************************************************************
839 *
840 * FUNCTION: acpi_ut_report_error
841 *
842 * PARAMETERS: module_name - Caller's module name (for error output)
843 * line_number - Caller's line number (for error output)
844 *
845 * RETURN: None
846 *
847 * DESCRIPTION: Print error message
848 *
849 ******************************************************************************/
850
851 void acpi_ut_report_error(char *module_name, u32 line_number)
852 {
853
854 acpi_os_printf("ACPI Error (%s-%04d): ", module_name, line_number);
855 }
856
857 /*******************************************************************************
858 *
859 * FUNCTION: acpi_ut_report_warning
860 *
861 * PARAMETERS: module_name - Caller's module name (for error output)
862 * line_number - Caller's line number (for error output)
863 *
864 * RETURN: None
865 *
866 * DESCRIPTION: Print warning message
867 *
868 ******************************************************************************/
869
870 void acpi_ut_report_warning(char *module_name, u32 line_number)
871 {
872
873 acpi_os_printf("ACPI Warning (%s-%04d): ", module_name, line_number);
874 }
875
876 /*******************************************************************************
877 *
878 * FUNCTION: acpi_ut_report_info
879 *
880 * PARAMETERS: module_name - Caller's module name (for error output)
881 * line_number - Caller's line number (for error output)
882 *
883 * RETURN: None
884 *
885 * DESCRIPTION: Print information message
886 *
887 ******************************************************************************/
888
889 void acpi_ut_report_info(char *module_name, u32 line_number)
890 {
891
892 acpi_os_printf("ACPI (%s-%04d): ", module_name, line_number);
893 }
Linux kernel - Deliverables
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