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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / acpi / acpica / psargs.c
blob91a5a69db80c316552e13f9704eb9435f9b94a30
1 /******************************************************************************
2 *
3 * Module Name: psargs - Parse AML opcode arguments
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2013, Intel Corp.
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 "accommon.h"
46 #include "acparser.h"
47 #include "amlcode.h"
48 #include "acnamesp.h"
49 #include "acdispat.h"
50
51 #define _COMPONENT ACPI_PARSER
52 ACPI_MODULE_NAME("psargs")
53
54 /* Local prototypes */
55 static u32
56 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state);
57
58 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
59 *parser_state);
60
61 /*******************************************************************************
62 *
63 * FUNCTION: acpi_ps_get_next_package_length
64 *
65 * PARAMETERS: parser_state - Current parser state object
66 *
67 * RETURN: Decoded package length. On completion, the AML pointer points
68 * past the length byte or bytes.
69 *
70 * DESCRIPTION: Decode and return a package length field.
71 * Note: Largest package length is 28 bits, from ACPI specification
72 *
73 ******************************************************************************/
74
75 static u32
76 acpi_ps_get_next_package_length(struct acpi_parse_state *parser_state)
77 {
78 u8 *aml = parser_state->aml;
79 u32 package_length = 0;
80 u32 byte_count;
81 u8 byte_zero_mask = 0x3F; /* Default [0:5] */
82
83 ACPI_FUNCTION_TRACE(ps_get_next_package_length);
84
85 /*
86 * Byte 0 bits [6:7] contain the number of additional bytes
87 * used to encode the package length, either 0,1,2, or 3
88 */
89 byte_count = (aml[0] >> 6);
90 parser_state->aml += ((acpi_size) byte_count + 1);
91
92 /* Get bytes 3, 2, 1 as needed */
93
94 while (byte_count) {
95 /*
96 * Final bit positions for the package length bytes:
97 * Byte3->[20:27]
98 * Byte2->[12:19]
99 * Byte1->[04:11]
100 * Byte0->[00:03]
101 */
102 package_length |= (aml[byte_count] << ((byte_count << 3) - 4));
103
104 byte_zero_mask = 0x0F; /* Use bits [0:3] of byte 0 */
105 byte_count--;
106 }
107
108 /* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
109
110 package_length |= (aml[0] & byte_zero_mask);
111 return_UINT32(package_length);
112 }
113
114 /*******************************************************************************
115 *
116 * FUNCTION: acpi_ps_get_next_package_end
117 *
118 * PARAMETERS: parser_state - Current parser state object
119 *
120 * RETURN: Pointer to end-of-package +1
121 *
122 * DESCRIPTION: Get next package length and return a pointer past the end of
123 * the package. Consumes the package length field
124 *
125 ******************************************************************************/
126
127 u8 *acpi_ps_get_next_package_end(struct acpi_parse_state *parser_state)
128 {
129 u8 *start = parser_state->aml;
130 u32 package_length;
131
132 ACPI_FUNCTION_TRACE(ps_get_next_package_end);
133
134 /* Function below updates parser_state->Aml */
135
136 package_length = acpi_ps_get_next_package_length(parser_state);
137
138 return_PTR(start + package_length); /* end of package */
139 }
140
141 /*******************************************************************************
142 *
143 * FUNCTION: acpi_ps_get_next_namestring
144 *
145 * PARAMETERS: parser_state - Current parser state object
146 *
147 * RETURN: Pointer to the start of the name string (pointer points into
148 * the AML.
149 *
150 * DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
151 * prefix characters. Set parser state to point past the string.
152 * (Name is consumed from the AML.)
153 *
154 ******************************************************************************/
155
156 char *acpi_ps_get_next_namestring(struct acpi_parse_state *parser_state)
157 {
158 u8 *start = parser_state->aml;
159 u8 *end = parser_state->aml;
160
161 ACPI_FUNCTION_TRACE(ps_get_next_namestring);
162
163 /* Point past any namestring prefix characters (backslash or carat) */
164
165 while (ACPI_IS_ROOT_PREFIX(*end) || ACPI_IS_PARENT_PREFIX(*end)) {
166 end++;
167 }
168
169 /* Decode the path prefix character */
170
171 switch (*end) {
172 case 0:
173
174 /* null_name */
175
176 if (end == start) {
177 start = NULL;
178 }
179 end++;
180 break;
181
182 case AML_DUAL_NAME_PREFIX:
183
184 /* Two name segments */
185
186 end += 1 + (2 * ACPI_NAME_SIZE);
187 break;
188
189 case AML_MULTI_NAME_PREFIX_OP:
190
191 /* Multiple name segments, 4 chars each, count in next byte */
192
193 end += 2 + (*(end + 1) * ACPI_NAME_SIZE);
194 break;
195
196 default:
197
198 /* Single name segment */
199
200 end += ACPI_NAME_SIZE;
201 break;
202 }
203
204 parser_state->aml = end;
205 return_PTR((char *)start);
206 }
207
208 /*******************************************************************************
209 *
210 * FUNCTION: acpi_ps_get_next_namepath
211 *
212 * PARAMETERS: parser_state - Current parser state object
213 * arg - Where the namepath will be stored
214 * arg_count - If the namepath points to a control method
215 * the method's argument is returned here.
216 * possible_method_call - Whether the namepath can possibly be the
217 * start of a method call
218 *
219 * RETURN: Status
220 *
221 * DESCRIPTION: Get next name (if method call, return # of required args).
222 * Names are looked up in the internal namespace to determine
223 * if the name represents a control method. If a method
224 * is found, the number of arguments to the method is returned.
225 * This information is critical for parsing to continue correctly.
226 *
227 ******************************************************************************/
228
229 acpi_status
230 acpi_ps_get_next_namepath(struct acpi_walk_state *walk_state,
231 struct acpi_parse_state *parser_state,
232 union acpi_parse_object *arg, u8 possible_method_call)
233 {
234 acpi_status status;
235 char *path;
236 union acpi_parse_object *name_op;
237 union acpi_operand_object *method_desc;
238 struct acpi_namespace_node *node;
239 u8 *start = parser_state->aml;
240
241 ACPI_FUNCTION_TRACE(ps_get_next_namepath);
242
243 path = acpi_ps_get_next_namestring(parser_state);
244 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
245
246 /* Null path case is allowed, just exit */
247
248 if (!path) {
249 arg->common.value.name = path;
250 return_ACPI_STATUS(AE_OK);
251 }
252
253 /*
254 * Lookup the name in the internal namespace, starting with the current
255 * scope. We don't want to add anything new to the namespace here,
256 * however, so we use MODE_EXECUTE.
257 * Allow searching of the parent tree, but don't open a new scope -
258 * we just want to lookup the object (must be mode EXECUTE to perform
259 * the upsearch)
260 */
261 status = acpi_ns_lookup(walk_state->scope_info, path,
262 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
263 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
264 NULL, &node);
265
266 /*
267 * If this name is a control method invocation, we must
268 * setup the method call
269 */
270 if (ACPI_SUCCESS(status) &&
271 possible_method_call && (node->type == ACPI_TYPE_METHOD)) {
272 if (walk_state->opcode == AML_UNLOAD_OP) {
273 /*
274 * acpi_ps_get_next_namestring has increased the AML pointer,
275 * so we need to restore the saved AML pointer for method call.
276 */
277 walk_state->parser_state.aml = start;
278 walk_state->arg_count = 1;
279 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
280 return_ACPI_STATUS(AE_OK);
281 }
282
283 /* This name is actually a control method invocation */
284
285 method_desc = acpi_ns_get_attached_object(node);
286 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
287 "Control Method - %p Desc %p Path=%p\n", node,
288 method_desc, path));
289
290 name_op = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
291 if (!name_op) {
292 return_ACPI_STATUS(AE_NO_MEMORY);
293 }
294
295 /* Change Arg into a METHOD CALL and attach name to it */
296
297 acpi_ps_init_op(arg, AML_INT_METHODCALL_OP);
298 name_op->common.value.name = path;
299
300 /* Point METHODCALL/NAME to the METHOD Node */
301
302 name_op->common.node = node;
303 acpi_ps_append_arg(arg, name_op);
304
305 if (!method_desc) {
306 ACPI_ERROR((AE_INFO,
307 "Control Method %p has no attached object",
308 node));
309 return_ACPI_STATUS(AE_AML_INTERNAL);
310 }
311
312 ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
313 "Control Method - %p Args %X\n",
314 node, method_desc->method.param_count));
315
316 /* Get the number of arguments to expect */
317
318 walk_state->arg_count = method_desc->method.param_count;
319 return_ACPI_STATUS(AE_OK);
320 }
321
322 /*
323 * Special handling if the name was not found during the lookup -
324 * some not_found cases are allowed
325 */
326 if (status == AE_NOT_FOUND) {
327
328 /* 1) not_found is ok during load pass 1/2 (allow forward references) */
329
330 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) !=
331 ACPI_PARSE_EXECUTE) {
332 status = AE_OK;
333 }
334
335 /* 2) not_found during a cond_ref_of(x) is ok by definition */
336
337 else if (walk_state->op->common.aml_opcode ==
338 AML_COND_REF_OF_OP) {
339 status = AE_OK;
340 }
341
342 /*
343 * 3) not_found while building a Package is ok at this point, we
344 * may flag as an error later if slack mode is not enabled.
345 * (Some ASL code depends on allowing this behavior)
346 */
347 else if ((arg->common.parent) &&
348 ((arg->common.parent->common.aml_opcode ==
349 AML_PACKAGE_OP)
350 || (arg->common.parent->common.aml_opcode ==
351 AML_VAR_PACKAGE_OP))) {
352 status = AE_OK;
353 }
354 }
355
356 /* Final exception check (may have been changed from code above) */
357
358 if (ACPI_FAILURE(status)) {
359 ACPI_ERROR_NAMESPACE(path, status);
360
361 if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) ==
362 ACPI_PARSE_EXECUTE) {
363
364 /* Report a control method execution error */
365
366 status = acpi_ds_method_error(status, walk_state);
367 }
368 }
369
370 /* Save the namepath */
371
372 arg->common.value.name = path;
373 return_ACPI_STATUS(status);
374 }
375
376 /*******************************************************************************
377 *
378 * FUNCTION: acpi_ps_get_next_simple_arg
379 *
380 * PARAMETERS: parser_state - Current parser state object
381 * arg_type - The argument type (AML_*_ARG)
382 * arg - Where the argument is returned
383 *
384 * RETURN: None
385 *
386 * DESCRIPTION: Get the next simple argument (constant, string, or namestring)
387 *
388 ******************************************************************************/
389
390 void
391 acpi_ps_get_next_simple_arg(struct acpi_parse_state *parser_state,
392 u32 arg_type, union acpi_parse_object *arg)
393 {
394 u32 length;
395 u16 opcode;
396 u8 *aml = parser_state->aml;
397
398 ACPI_FUNCTION_TRACE_U32(ps_get_next_simple_arg, arg_type);
399
400 switch (arg_type) {
401 case ARGP_BYTEDATA:
402
403 /* Get 1 byte from the AML stream */
404
405 opcode = AML_BYTE_OP;
406 arg->common.value.integer = (u64) *aml;
407 length = 1;
408 break;
409
410 case ARGP_WORDDATA:
411
412 /* Get 2 bytes from the AML stream */
413
414 opcode = AML_WORD_OP;
415 ACPI_MOVE_16_TO_64(&arg->common.value.integer, aml);
416 length = 2;
417 break;
418
419 case ARGP_DWORDDATA:
420
421 /* Get 4 bytes from the AML stream */
422
423 opcode = AML_DWORD_OP;
424 ACPI_MOVE_32_TO_64(&arg->common.value.integer, aml);
425 length = 4;
426 break;
427
428 case ARGP_QWORDDATA:
429
430 /* Get 8 bytes from the AML stream */
431
432 opcode = AML_QWORD_OP;
433 ACPI_MOVE_64_TO_64(&arg->common.value.integer, aml);
434 length = 8;
435 break;
436
437 case ARGP_CHARLIST:
438
439 /* Get a pointer to the string, point past the string */
440
441 opcode = AML_STRING_OP;
442 arg->common.value.string = ACPI_CAST_PTR(char, aml);
443
444 /* Find the null terminator */
445
446 length = 0;
447 while (aml[length]) {
448 length++;
449 }
450 length++;
451 break;
452
453 case ARGP_NAME:
454 case ARGP_NAMESTRING:
455
456 acpi_ps_init_op(arg, AML_INT_NAMEPATH_OP);
457 arg->common.value.name =
458 acpi_ps_get_next_namestring(parser_state);
459 return_VOID;
460
461 default:
462
463 ACPI_ERROR((AE_INFO, "Invalid ArgType 0x%X", arg_type));
464 return_VOID;
465 }
466
467 acpi_ps_init_op(arg, opcode);
468 parser_state->aml += length;
469 return_VOID;
470 }
471
472 /*******************************************************************************
473 *
474 * FUNCTION: acpi_ps_get_next_field
475 *
476 * PARAMETERS: parser_state - Current parser state object
477 *
478 * RETURN: A newly allocated FIELD op
479 *
480 * DESCRIPTION: Get next field (named_field, reserved_field, or access_field)
481 *
482 ******************************************************************************/
483
484 static union acpi_parse_object *acpi_ps_get_next_field(struct acpi_parse_state
485 *parser_state)
486 {
487 u32 aml_offset;
488 union acpi_parse_object *field;
489 union acpi_parse_object *arg = NULL;
490 u16 opcode;
491 u32 name;
492 u8 access_type;
493 u8 access_attribute;
494 u8 access_length;
495 u32 pkg_length;
496 u8 *pkg_end;
497 u32 buffer_length;
498
499 ACPI_FUNCTION_TRACE(ps_get_next_field);
500
501 aml_offset =
502 (u32)ACPI_PTR_DIFF(parser_state->aml, parser_state->aml_start);
503
504 /* Determine field type */
505
506 switch (ACPI_GET8(parser_state->aml)) {
507 case AML_FIELD_OFFSET_OP:
508
509 opcode = AML_INT_RESERVEDFIELD_OP;
510 parser_state->aml++;
511 break;
512
513 case AML_FIELD_ACCESS_OP:
514
515 opcode = AML_INT_ACCESSFIELD_OP;
516 parser_state->aml++;
517 break;
518
519 case AML_FIELD_CONNECTION_OP:
520
521 opcode = AML_INT_CONNECTION_OP;
522 parser_state->aml++;
523 break;
524
525 case AML_FIELD_EXT_ACCESS_OP:
526
527 opcode = AML_INT_EXTACCESSFIELD_OP;
528 parser_state->aml++;
529 break;
530
531 default:
532
533 opcode = AML_INT_NAMEDFIELD_OP;
534 break;
535 }
536
537 /* Allocate a new field op */
538
539 field = acpi_ps_alloc_op(opcode);
540 if (!field) {
541 return_PTR(NULL);
542 }
543
544 field->common.aml_offset = aml_offset;
545
546 /* Decode the field type */
547
548 switch (opcode) {
549 case AML_INT_NAMEDFIELD_OP:
550
551 /* Get the 4-character name */
552
553 ACPI_MOVE_32_TO_32(&name, parser_state->aml);
554 acpi_ps_set_name(field, name);
555 parser_state->aml += ACPI_NAME_SIZE;
556
557 /* Get the length which is encoded as a package length */
558
559 field->common.value.size =
560 acpi_ps_get_next_package_length(parser_state);
561 break;
562
563 case AML_INT_RESERVEDFIELD_OP:
564
565 /* Get the length which is encoded as a package length */
566
567 field->common.value.size =
568 acpi_ps_get_next_package_length(parser_state);
569 break;
570
571 case AML_INT_ACCESSFIELD_OP:
572 case AML_INT_EXTACCESSFIELD_OP:
573
574 /*
575 * Get access_type and access_attrib and merge into the field Op
576 * access_type is first operand, access_attribute is second. stuff
577 * these bytes into the node integer value for convenience.
578 */
579
580 /* Get the two bytes (Type/Attribute) */
581
582 access_type = ACPI_GET8(parser_state->aml);
583 parser_state->aml++;
584 access_attribute = ACPI_GET8(parser_state->aml);
585 parser_state->aml++;
586
587 field->common.value.integer = (u8)access_type;
588 field->common.value.integer |= (u16)(access_attribute << 8);
589
590 /* This opcode has a third byte, access_length */
591
592 if (opcode == AML_INT_EXTACCESSFIELD_OP) {
593 access_length = ACPI_GET8(parser_state->aml);
594 parser_state->aml++;
595
596 field->common.value.integer |=
597 (u32)(access_length << 16);
598 }
599 break;
600
601 case AML_INT_CONNECTION_OP:
602
603 /*
604 * Argument for Connection operator can be either a Buffer
605 * (resource descriptor), or a name_string.
606 */
607 if (ACPI_GET8(parser_state->aml) == AML_BUFFER_OP) {
608 parser_state->aml++;
609
610 pkg_end = parser_state->aml;
611 pkg_length =
612 acpi_ps_get_next_package_length(parser_state);
613 pkg_end += pkg_length;
614
615 if (parser_state->aml < pkg_end) {
616
617 /* Non-empty list */
618
619 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
620 if (!arg) {
621 acpi_ps_free_op(field);
622 return_PTR(NULL);
623 }
624
625 /* Get the actual buffer length argument */
626
627 opcode = ACPI_GET8(parser_state->aml);
628 parser_state->aml++;
629
630 switch (opcode) {
631 case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
632
633 buffer_length =
634 ACPI_GET8(parser_state->aml);
635 parser_state->aml += 1;
636 break;
637
638 case AML_WORD_OP: /* AML_WORDDATA_ARG */
639
640 buffer_length =
641 ACPI_GET16(parser_state->aml);
642 parser_state->aml += 2;
643 break;
644
645 case AML_DWORD_OP: /* AML_DWORDATA_ARG */
646
647 buffer_length =
648 ACPI_GET32(parser_state->aml);
649 parser_state->aml += 4;
650 break;
651
652 default:
653
654 buffer_length = 0;
655 break;
656 }
657
658 /* Fill in bytelist data */
659
660 arg->named.value.size = buffer_length;
661 arg->named.data = parser_state->aml;
662 }
663
664 /* Skip to End of byte data */
665
666 parser_state->aml = pkg_end;
667 } else {
668 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
669 if (!arg) {
670 acpi_ps_free_op(field);
671 return_PTR(NULL);
672 }
673
674 /* Get the Namestring argument */
675
676 arg->common.value.name =
677 acpi_ps_get_next_namestring(parser_state);
678 }
679
680 /* Link the buffer/namestring to parent (CONNECTION_OP) */
681
682 acpi_ps_append_arg(field, arg);
683 break;
684
685 default:
686
687 /* Opcode was set in previous switch */
688 break;
689 }
690
691 return_PTR(field);
692 }
693
694 /*******************************************************************************
695 *
696 * FUNCTION: acpi_ps_get_next_arg
697 *
698 * PARAMETERS: walk_state - Current state
699 * parser_state - Current parser state object
700 * arg_type - The argument type (AML_*_ARG)
701 * return_arg - Where the next arg is returned
702 *
703 * RETURN: Status, and an op object containing the next argument.
704 *
705 * DESCRIPTION: Get next argument (including complex list arguments that require
706 * pushing the parser stack)
707 *
708 ******************************************************************************/
709
710 acpi_status
711 acpi_ps_get_next_arg(struct acpi_walk_state *walk_state,
712 struct acpi_parse_state *parser_state,
713 u32 arg_type, union acpi_parse_object **return_arg)
714 {
715 union acpi_parse_object *arg = NULL;
716 union acpi_parse_object *prev = NULL;
717 union acpi_parse_object *field;
718 u32 subop;
719 acpi_status status = AE_OK;
720
721 ACPI_FUNCTION_TRACE_PTR(ps_get_next_arg, parser_state);
722
723 switch (arg_type) {
724 case ARGP_BYTEDATA:
725 case ARGP_WORDDATA:
726 case ARGP_DWORDDATA:
727 case ARGP_CHARLIST:
728 case ARGP_NAME:
729 case ARGP_NAMESTRING:
730
731 /* Constants, strings, and namestrings are all the same size */
732
733 arg = acpi_ps_alloc_op(AML_BYTE_OP);
734 if (!arg) {
735 return_ACPI_STATUS(AE_NO_MEMORY);
736 }
737 acpi_ps_get_next_simple_arg(parser_state, arg_type, arg);
738 break;
739
740 case ARGP_PKGLENGTH:
741
742 /* Package length, nothing returned */
743
744 parser_state->pkg_end =
745 acpi_ps_get_next_package_end(parser_state);
746 break;
747
748 case ARGP_FIELDLIST:
749
750 if (parser_state->aml < parser_state->pkg_end) {
751
752 /* Non-empty list */
753
754 while (parser_state->aml < parser_state->pkg_end) {
755 field = acpi_ps_get_next_field(parser_state);
756 if (!field) {
757 return_ACPI_STATUS(AE_NO_MEMORY);
758 }
759
760 if (prev) {
761 prev->common.next = field;
762 } else {
763 arg = field;
764 }
765 prev = field;
766 }
767
768 /* Skip to End of byte data */
769
770 parser_state->aml = parser_state->pkg_end;
771 }
772 break;
773
774 case ARGP_BYTELIST:
775
776 if (parser_state->aml < parser_state->pkg_end) {
777
778 /* Non-empty list */
779
780 arg = acpi_ps_alloc_op(AML_INT_BYTELIST_OP);
781 if (!arg) {
782 return_ACPI_STATUS(AE_NO_MEMORY);
783 }
784
785 /* Fill in bytelist data */
786
787 arg->common.value.size = (u32)
788 ACPI_PTR_DIFF(parser_state->pkg_end,
789 parser_state->aml);
790 arg->named.data = parser_state->aml;
791
792 /* Skip to End of byte data */
793
794 parser_state->aml = parser_state->pkg_end;
795 }
796 break;
797
798 case ARGP_TARGET:
799 case ARGP_SUPERNAME:
800 case ARGP_SIMPLENAME:
801
802 subop = acpi_ps_peek_opcode(parser_state);
803 if (subop == 0 ||
804 acpi_ps_is_leading_char(subop) ||
805 ACPI_IS_ROOT_PREFIX(subop) ||
806 ACPI_IS_PARENT_PREFIX(subop)) {
807
808 /* null_name or name_string */
809
810 arg = acpi_ps_alloc_op(AML_INT_NAMEPATH_OP);
811 if (!arg) {
812 return_ACPI_STATUS(AE_NO_MEMORY);
813 }
814
815 /* To support super_name arg of Unload */
816
817 if (walk_state->opcode == AML_UNLOAD_OP) {
818 status =
819 acpi_ps_get_next_namepath(walk_state,
820 parser_state, arg,
821 1);
822
823 /*
824 * If the super_name arg of Unload is a method call,
825 * we have restored the AML pointer, just free this Arg
826 */
827 if (arg->common.aml_opcode ==
828 AML_INT_METHODCALL_OP) {
829 acpi_ps_free_op(arg);
830 arg = NULL;
831 }
832 } else {
833 status =
834 acpi_ps_get_next_namepath(walk_state,
835 parser_state, arg,
836 0);
837 }
838 } else {
839 /* Single complex argument, nothing returned */
840
841 walk_state->arg_count = 1;
842 }
843 break;
844
845 case ARGP_DATAOBJ:
846 case ARGP_TERMARG:
847
848 /* Single complex argument, nothing returned */
849
850 walk_state->arg_count = 1;
851 break;
852
853 case ARGP_DATAOBJLIST:
854 case ARGP_TERMLIST:
855 case ARGP_OBJLIST:
856
857 if (parser_state->aml < parser_state->pkg_end) {
858
859 /* Non-empty list of variable arguments, nothing returned */
860
861 walk_state->arg_count = ACPI_VAR_ARGS;
862 }
863 break;
864
865 default:
866
867 ACPI_ERROR((AE_INFO, "Invalid ArgType: 0x%X", arg_type));
868 status = AE_AML_OPERAND_TYPE;
869 break;
870 }
871
872 *return_arg = arg;
873 return_ACPI_STATUS(status);
874 }
Linux with added FPC-III support