1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
|
/*******************************************************************************
*
* Module Name: utresrc - Resource management utilities
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2017, Intel Corp.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include "accommon.h"
#include "acresrc.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME("utresrc")
#if defined(ACPI_DEBUG_OUTPUT) || defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
/*
* Strings used to decode resource descriptors.
* Used by both the disassembler and the debugger resource dump routines
*/
const char *acpi_gbl_bm_decode[] = {
"NotBusMaster",
"BusMaster"
};
const char *acpi_gbl_config_decode[] = {
"0 - Good Configuration",
"1 - Acceptable Configuration",
"2 - Suboptimal Configuration",
"3 - ***Invalid Configuration***",
};
const char *acpi_gbl_consume_decode[] = {
"ResourceProducer",
"ResourceConsumer"
};
const char *acpi_gbl_dec_decode[] = {
"PosDecode",
"SubDecode"
};
const char *acpi_gbl_he_decode[] = {
"Level",
"Edge"
};
const char *acpi_gbl_io_decode[] = {
"Decode10",
"Decode16"
};
const char *acpi_gbl_ll_decode[] = {
"ActiveHigh",
"ActiveLow",
"ActiveBoth",
"Reserved"
};
const char *acpi_gbl_max_decode[] = {
"MaxNotFixed",
"MaxFixed"
};
const char *acpi_gbl_mem_decode[] = {
"NonCacheable",
"Cacheable",
"WriteCombining",
"Prefetchable"
};
const char *acpi_gbl_min_decode[] = {
"MinNotFixed",
"MinFixed"
};
const char *acpi_gbl_mtp_decode[] = {
"AddressRangeMemory",
"AddressRangeReserved",
"AddressRangeACPI",
"AddressRangeNVS"
};
const char *acpi_gbl_rng_decode[] = {
"InvalidRanges",
"NonISAOnlyRanges",
"ISAOnlyRanges",
"EntireRange"
};
const char *acpi_gbl_rw_decode[] = {
"ReadOnly",
"ReadWrite"
};
const char *acpi_gbl_shr_decode[] = {
"Exclusive",
"Shared",
"ExclusiveAndWake", /* ACPI 5.0 */
"SharedAndWake" /* ACPI 5.0 */
};
const char *acpi_gbl_siz_decode[] = {
"Transfer8",
"Transfer8_16",
"Transfer16",
"InvalidSize"
};
const char *acpi_gbl_trs_decode[] = {
"DenseTranslation",
"SparseTranslation"
};
const char *acpi_gbl_ttp_decode[] = {
"TypeStatic",
"TypeTranslation"
};
const char *acpi_gbl_typ_decode[] = {
"Compatibility",
"TypeA",
"TypeB",
"TypeF"
};
const char *acpi_gbl_ppc_decode[] = {
"PullDefault",
"PullUp",
"PullDown",
"PullNone"
};
const char *acpi_gbl_ior_decode[] = {
"IoRestrictionNone",
"IoRestrictionInputOnly",
"IoRestrictionOutputOnly",
"IoRestrictionNoneAndPreserve"
};
const char *acpi_gbl_dts_decode[] = {
"Width8bit",
"Width16bit",
"Width32bit",
"Width64bit",
"Width128bit",
"Width256bit",
};
/* GPIO connection type */
const char *acpi_gbl_ct_decode[] = {
"Interrupt",
"I/O"
};
/* Serial bus type */
const char *acpi_gbl_sbt_decode[] = {
"/* UNKNOWN serial bus type */",
"I2C",
"SPI",
"UART"
};
/* I2C serial bus access mode */
const char *acpi_gbl_am_decode[] = {
"AddressingMode7Bit",
"AddressingMode10Bit"
};
/* I2C serial bus slave mode */
const char *acpi_gbl_sm_decode[] = {
"ControllerInitiated",
"DeviceInitiated"
};
/* SPI serial bus wire mode */
const char *acpi_gbl_wm_decode[] = {
"FourWireMode",
"ThreeWireMode"
};
/* SPI serial clock phase */
const char *acpi_gbl_cph_decode[] = {
"ClockPhaseFirst",
"ClockPhaseSecond"
};
/* SPI serial bus clock polarity */
const char *acpi_gbl_cpo_decode[] = {
"ClockPolarityLow",
"ClockPolarityHigh"
};
/* SPI serial bus device polarity */
const char *acpi_gbl_dp_decode[] = {
"PolarityLow",
"PolarityHigh"
};
/* UART serial bus endian */
const char *acpi_gbl_ed_decode[] = {
"LittleEndian",
"BigEndian"
};
/* UART serial bus bits per byte */
const char *acpi_gbl_bpb_decode[] = {
"DataBitsFive",
"DataBitsSix",
"DataBitsSeven",
"DataBitsEight",
"DataBitsNine",
"/* UNKNOWN Bits per byte */",
"/* UNKNOWN Bits per byte */",
"/* UNKNOWN Bits per byte */"
};
/* UART serial bus stop bits */
const char *acpi_gbl_sb_decode[] = {
"StopBitsZero",
"StopBitsOne",
"StopBitsOnePlusHalf",
"StopBitsTwo"
};
/* UART serial bus flow control */
const char *acpi_gbl_fc_decode[] = {
"FlowControlNone",
"FlowControlHardware",
"FlowControlXON",
"/* UNKNOWN flow control keyword */"
};
/* UART serial bus parity type */
const char *acpi_gbl_pt_decode[] = {
"ParityTypeNone",
"ParityTypeEven",
"ParityTypeOdd",
"ParityTypeMark",
"ParityTypeSpace",
"/* UNKNOWN parity keyword */",
"/* UNKNOWN parity keyword */",
"/* UNKNOWN parity keyword */"
};
/* pin_config type */
const char *acpi_gbl_ptyp_decode[] = {
"Default",
"Bias Pull-up",
"Bias Pull-down",
"Bias Default",
"Bias Disable",
"Bias High Impedance",
"Bias Bus Hold",
"Drive Open Drain",
"Drive Open Source",
"Drive Push Pull",
"Drive Strength",
"Slew Rate",
"Input Debounce",
"Input Schmitt Trigger",
};
#endif
/*
* Base sizes of the raw AML resource descriptors, indexed by resource type.
* Zero indicates a reserved (and therefore invalid) resource type.
*/
const u8 acpi_gbl_resource_aml_sizes[] = {
/* Small descriptors */
0,
0,
0,
0,
ACPI_AML_SIZE_SMALL(struct aml_resource_irq),
ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
ACPI_AML_SIZE_SMALL(struct aml_resource_io),
ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_dma),
0,
0,
0,
ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small),
ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),
/* Large descriptors */
0,
ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
0,
ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64),
ACPI_AML_SIZE_LARGE(struct aml_resource_gpio),
ACPI_AML_SIZE_LARGE(struct aml_resource_pin_function),
ACPI_AML_SIZE_LARGE(struct aml_resource_common_serialbus),
ACPI_AML_SIZE_LARGE(struct aml_resource_pin_config),
ACPI_AML_SIZE_LARGE(struct aml_resource_pin_group),
ACPI_AML_SIZE_LARGE(struct aml_resource_pin_group_function),
ACPI_AML_SIZE_LARGE(struct aml_resource_pin_group_config),
};
const u8 acpi_gbl_resource_aml_serial_bus_sizes[] = {
0,
ACPI_AML_SIZE_LARGE(struct aml_resource_i2c_serialbus),
ACPI_AML_SIZE_LARGE(struct aml_resource_spi_serialbus),
ACPI_AML_SIZE_LARGE(struct aml_resource_uart_serialbus),
};
/*
* Resource types, used to validate the resource length field.
* The length of fixed-length types must match exactly, variable
* lengths must meet the minimum required length, etc.
* Zero indicates a reserved (and therefore invalid) resource type.
*/
static const u8 acpi_gbl_resource_types[] = {
/* Small descriptors */
0,
0,
0,
0,
ACPI_SMALL_VARIABLE_LENGTH, /* 04 IRQ */
ACPI_FIXED_LENGTH, /* 05 DMA */
ACPI_SMALL_VARIABLE_LENGTH, /* 06 start_dependent_functions */
ACPI_FIXED_LENGTH, /* 07 end_dependent_functions */
ACPI_FIXED_LENGTH, /* 08 IO */
ACPI_FIXED_LENGTH, /* 09 fixed_IO */
ACPI_FIXED_LENGTH, /* 0A fixed_DMA */
0,
0,
0,
ACPI_VARIABLE_LENGTH, /* 0E vendor_short */
ACPI_FIXED_LENGTH, /* 0F end_tag */
/* Large descriptors */
0,
ACPI_FIXED_LENGTH, /* 01 Memory24 */
ACPI_FIXED_LENGTH, /* 02 generic_register */
0,
ACPI_VARIABLE_LENGTH, /* 04 vendor_long */
ACPI_FIXED_LENGTH, /* 05 Memory32 */
ACPI_FIXED_LENGTH, /* 06 memory32_fixed */
ACPI_VARIABLE_LENGTH, /* 07 Dword* address */
ACPI_VARIABLE_LENGTH, /* 08 Word* address */
ACPI_VARIABLE_LENGTH, /* 09 extended_IRQ */
ACPI_VARIABLE_LENGTH, /* 0A Qword* address */
ACPI_FIXED_LENGTH, /* 0B Extended* address */
ACPI_VARIABLE_LENGTH, /* 0C Gpio* */
ACPI_VARIABLE_LENGTH, /* 0D pin_function */
ACPI_VARIABLE_LENGTH, /* 0E *serial_bus */
ACPI_VARIABLE_LENGTH, /* 0F pin_config */
ACPI_VARIABLE_LENGTH, /* 10 pin_group */
ACPI_VARIABLE_LENGTH, /* 11 pin_group_function */
ACPI_VARIABLE_LENGTH, /* 12 pin_group_config */
};
/*******************************************************************************
*
* FUNCTION: acpi_ut_walk_aml_resources
*
* PARAMETERS: walk_state - Current walk info
* PARAMETERS: aml - Pointer to the raw AML resource template
* aml_length - Length of the entire template
* user_function - Called once for each descriptor found. If
* NULL, a pointer to the end_tag is returned
* context - Passed to user_function
*
* RETURN: Status
*
* DESCRIPTION: Walk a raw AML resource list(buffer). User function called
* once for each resource found.
*
******************************************************************************/
acpi_status
acpi_ut_walk_aml_resources(struct acpi_walk_state *walk_state,
u8 *aml,
acpi_size aml_length,
acpi_walk_aml_callback user_function, void **context)
{
acpi_status status;
u8 *end_aml;
u8 resource_index;
u32 length;
u32 offset = 0;
u8 end_tag[2] = { 0x79, 0x00 };
ACPI_FUNCTION_TRACE(ut_walk_aml_resources);
/* The absolute minimum resource template is one end_tag descriptor */
if (aml_length < sizeof(struct aml_resource_end_tag)) {
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/* Point to the end of the resource template buffer */
end_aml = aml + aml_length;
/* Walk the byte list, abort on any invalid descriptor type or length */
while (aml < end_aml) {
/* Validate the Resource Type and Resource Length */
status =
acpi_ut_validate_resource(walk_state, aml, &resource_index);
if (ACPI_FAILURE(status)) {
/*
* Exit on failure. Cannot continue because the descriptor
* length may be bogus also.
*/
return_ACPI_STATUS(status);
}
/* Get the length of this descriptor */
length = acpi_ut_get_descriptor_length(aml);
/* Invoke the user function */
if (user_function) {
status =
user_function(aml, length, offset, resource_index,
context);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
/* An end_tag descriptor terminates this resource template */
if (acpi_ut_get_resource_type(aml) ==
ACPI_RESOURCE_NAME_END_TAG) {
/*
* There must be at least one more byte in the buffer for
* the 2nd byte of the end_tag
*/
if ((aml + 1) >= end_aml) {
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/*
* The end_tag opcode must be followed by a zero byte.
* Although this byte is technically defined to be a checksum,
* in practice, all ASL compilers set this byte to zero.
*/
if (*(aml + 1) != 0) {
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/* Return the pointer to the end_tag if requested */
if (!user_function) {
*context = aml;
}
/* Normal exit */
return_ACPI_STATUS(AE_OK);
}
aml += length;
offset += length;
}
/* Did not find an end_tag descriptor */
if (user_function) {
/* Insert an end_tag anyway. acpi_rs_get_list_length always leaves room */
(void)acpi_ut_validate_resource(walk_state, end_tag,
&resource_index);
status =
user_function(end_tag, 2, offset, resource_index, context);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
}
return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_validate_resource
*
* PARAMETERS: walk_state - Current walk info
* aml - Pointer to the raw AML resource descriptor
* return_index - Where the resource index is returned. NULL
* if the index is not required.
*
* RETURN: Status, and optionally the Index into the global resource tables
*
* DESCRIPTION: Validate an AML resource descriptor by checking the Resource
* Type and Resource Length. Returns an index into the global
* resource information/dispatch tables for later use.
*
******************************************************************************/
acpi_status
acpi_ut_validate_resource(struct acpi_walk_state *walk_state,
void *aml, u8 *return_index)
{
union aml_resource *aml_resource;
u8 resource_type;
u8 resource_index;
acpi_rs_length resource_length;
acpi_rs_length minimum_resource_length;
ACPI_FUNCTION_ENTRY();
/*
* 1) Validate the resource_type field (Byte 0)
*/
resource_type = ACPI_GET8(aml);
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
/* Verify the large resource type (name) against the max */
if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
goto invalid_resource;
}
/*
* Large Resource Type -- bits 6:0 contain the name
* Translate range 0x80-0x8B to index range 0x10-0x1B
*/
resource_index = (u8) (resource_type - 0x70);
} else {
/*
* Small Resource Type -- bits 6:3 contain the name
* Shift range to index range 0x00-0x0F
*/
resource_index = (u8)
((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
}
/*
* Check validity of the resource type, via acpi_gbl_resource_types.
* Zero indicates an invalid resource.
*/
if (!acpi_gbl_resource_types[resource_index]) {
goto invalid_resource;
}
/*
* Validate the resource_length field. This ensures that the length
* is at least reasonable, and guarantees that it is non-zero.
*/
resource_length = acpi_ut_get_resource_length(aml);
minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index];
/* Validate based upon the type of resource - fixed length or variable */
switch (acpi_gbl_resource_types[resource_index]) {
case ACPI_FIXED_LENGTH:
/* Fixed length resource, length must match exactly */
if (resource_length != minimum_resource_length) {
goto bad_resource_length;
}
break;
case ACPI_VARIABLE_LENGTH:
/* Variable length resource, length must be at least the minimum */
if (resource_length < minimum_resource_length) {
goto bad_resource_length;
}
break;
case ACPI_SMALL_VARIABLE_LENGTH:
/* Small variable length resource, length can be (Min) or (Min-1) */
if ((resource_length > minimum_resource_length) ||
(resource_length < (minimum_resource_length - 1))) {
goto bad_resource_length;
}
break;
default:
/* Shouldn't happen (because of validation earlier), but be sure */
goto invalid_resource;
}
aml_resource = ACPI_CAST_PTR(union aml_resource, aml);
if (resource_type == ACPI_RESOURCE_NAME_SERIAL_BUS) {
/* Validate the bus_type field */
if ((aml_resource->common_serial_bus.type == 0) ||
(aml_resource->common_serial_bus.type >
AML_RESOURCE_MAX_SERIALBUSTYPE)) {
if (walk_state) {
ACPI_ERROR((AE_INFO,
"Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X",
aml_resource->common_serial_bus.
type));
}
return (AE_AML_INVALID_RESOURCE_TYPE);
}
}
/* Optionally return the resource table index */
if (return_index) {
*return_index = resource_index;
}
return (AE_OK);
invalid_resource:
if (walk_state) {
ACPI_ERROR((AE_INFO,
"Invalid/unsupported resource descriptor: Type 0x%2.2X",
resource_type));
}
return (AE_AML_INVALID_RESOURCE_TYPE);
bad_resource_length:
if (walk_state) {
ACPI_ERROR((AE_INFO,
"Invalid resource descriptor length: Type "
"0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X",
resource_type, resource_length,
minimum_resource_length));
}
return (AE_AML_BAD_RESOURCE_LENGTH);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_resource_type
*
* PARAMETERS: aml - Pointer to the raw AML resource descriptor
*
* RETURN: The Resource Type with no extraneous bits (except the
* Large/Small descriptor bit -- this is left alone)
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
u8 acpi_ut_get_resource_type(void *aml)
{
ACPI_FUNCTION_ENTRY();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
/* Large Resource Type -- bits 6:0 contain the name */
return (ACPI_GET8(aml));
} else {
/* Small Resource Type -- bits 6:3 contain the name */
return ((u8) (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_resource_length
*
* PARAMETERS: aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte Length
*
* DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
* definition, this does not include the size of the descriptor
* header or the length field itself.
*
******************************************************************************/
u16 acpi_ut_get_resource_length(void *aml)
{
acpi_rs_length resource_length;
ACPI_FUNCTION_ENTRY();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Examine the large/small bit in the resource header
*/
if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
/* Large Resource type -- bytes 1-2 contain the 16-bit length */
ACPI_MOVE_16_TO_16(&resource_length, ACPI_ADD_PTR(u8, aml, 1));
} else {
/* Small Resource type -- bits 2:0 of byte 0 contain the length */
resource_length = (u16) (ACPI_GET8(aml) &
ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
}
return (resource_length);
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_resource_header_length
*
* PARAMETERS: aml - Pointer to the raw AML resource descriptor
*
* RETURN: Length of the AML header (depends on large/small descriptor)
*
* DESCRIPTION: Get the length of the header for this resource.
*
******************************************************************************/
u8 acpi_ut_get_resource_header_length(void *aml)
{
ACPI_FUNCTION_ENTRY();
/* Examine the large/small bit in the resource header */
if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
return (sizeof(struct aml_resource_large_header));
} else {
return (sizeof(struct aml_resource_small_header));
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_descriptor_length
*
* PARAMETERS: aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte length
*
* DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
* length of the descriptor header and the length field itself.
* Used to walk descriptor lists.
*
******************************************************************************/
u32 acpi_ut_get_descriptor_length(void *aml)
{
ACPI_FUNCTION_ENTRY();
/*
* Get the Resource Length (does not include header length) and add
* the header length (depends on if this is a small or large resource)
*/
return (acpi_ut_get_resource_length(aml) +
acpi_ut_get_resource_header_length(aml));
}
/*******************************************************************************
*
* FUNCTION: acpi_ut_get_resource_end_tag
*
* PARAMETERS: obj_desc - The resource template buffer object
* end_tag - Where the pointer to the end_tag is returned
*
* RETURN: Status, pointer to the end tag
*
* DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
* Note: allows a buffer length of zero.
*
******************************************************************************/
acpi_status
acpi_ut_get_resource_end_tag(union acpi_operand_object *obj_desc, u8 **end_tag)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ut_get_resource_end_tag);
/* Allow a buffer length of zero */
if (!obj_desc->buffer.length) {
*end_tag = obj_desc->buffer.pointer;
return_ACPI_STATUS(AE_OK);
}
/* Validate the template and get a pointer to the end_tag */
status = acpi_ut_walk_aml_resources(NULL, obj_desc->buffer.pointer,
obj_desc->buffer.length, NULL,
(void **)end_tag);
return_ACPI_STATUS(status);
}
|