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[deliverable/linux.git] / drivers / acpi / resources / rsaddr.c
1 /*******************************************************************************
2 *
3 * Module Name: rsaddr - Address resource descriptors (16/32/64)
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2005, 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/acresrc.h>
46
47 #define _COMPONENT ACPI_RESOURCES
48 ACPI_MODULE_NAME("rsaddr")
49
50 /* Local prototypes */
51 static void
52 acpi_rs_decode_general_flags(union acpi_resource_data *resource, u8 flags);
53
54 static u8 acpi_rs_encode_general_flags(union acpi_resource_data *resource);
55
56 static void
57 acpi_rs_decode_specific_flags(union acpi_resource_data *resource, u8 flags);
58
59 static u8 acpi_rs_encode_specific_flags(union acpi_resource_data *resource);
60
61 /*******************************************************************************
62 *
63 * FUNCTION: acpi_rs_decode_general_flags
64 *
65 * PARAMETERS: Resource - Address resource data struct
66 * Flags - Actual flag byte
67 *
68 * RETURN: Decoded flag bits in resource struct
69 *
70 * DESCRIPTION: Decode a general flag byte to an address resource struct
71 *
72 ******************************************************************************/
73
74 static void
75 acpi_rs_decode_general_flags(union acpi_resource_data *resource, u8 flags)
76 {
77 ACPI_FUNCTION_ENTRY();
78
79 /* Producer / Consumer - flag bit[0] */
80
81 resource->address.producer_consumer = (u32) (flags & 0x01);
82
83 /* Decode (_DEC) - flag bit[1] */
84
85 resource->address.decode = (u32) ((flags >> 1) & 0x01);
86
87 /* Min Address Fixed (_MIF) - flag bit[2] */
88
89 resource->address.min_address_fixed = (u32) ((flags >> 2) & 0x01);
90
91 /* Max Address Fixed (_MAF) - flag bit[3] */
92
93 resource->address.max_address_fixed = (u32) ((flags >> 3) & 0x01);
94 }
95
96 /*******************************************************************************
97 *
98 * FUNCTION: acpi_rs_encode_general_flags
99 *
100 * PARAMETERS: Resource - Address resource data struct
101 *
102 * RETURN: Encoded general flag byte
103 *
104 * DESCRIPTION: Construct a general flag byte from an address resource struct
105 *
106 ******************************************************************************/
107
108 static u8 acpi_rs_encode_general_flags(union acpi_resource_data *resource)
109 {
110 u8 flags;
111
112 ACPI_FUNCTION_ENTRY();
113
114 /* Producer / Consumer - flag bit[0] */
115
116 flags = (u8) (resource->address.producer_consumer & 0x01);
117
118 /* Decode (_DEC) - flag bit[1] */
119
120 flags |= (u8) ((resource->address.decode & 0x01) << 1);
121
122 /* Min Address Fixed (_MIF) - flag bit[2] */
123
124 flags |= (u8) ((resource->address.min_address_fixed & 0x01) << 2);
125
126 /* Max Address Fixed (_MAF) - flag bit[3] */
127
128 flags |= (u8) ((resource->address.max_address_fixed & 0x01) << 3);
129
130 return (flags);
131 }
132
133 /*******************************************************************************
134 *
135 * FUNCTION: acpi_rs_decode_specific_flags
136 *
137 * PARAMETERS: Resource - Address resource data struct
138 * Flags - Actual flag byte
139 *
140 * RETURN: Decoded flag bits in attribute struct
141 *
142 * DESCRIPTION: Decode a type-specific flag byte to an attribute struct.
143 * Type-specific flags are only defined for the Memory and IO
144 * resource types.
145 *
146 ******************************************************************************/
147
148 static void
149 acpi_rs_decode_specific_flags(union acpi_resource_data *resource, u8 flags)
150 {
151 ACPI_FUNCTION_ENTRY();
152
153 if (resource->address.resource_type == ACPI_MEMORY_RANGE) {
154 /* Write Status (_RW) - flag bit[0] */
155
156 resource->address.attribute.memory.read_write_attribute =
157 (u16) (flags & 0x01);
158
159 /* Memory Attributes (_MEM) - flag bits[2:1] */
160
161 resource->address.attribute.memory.cache_attribute =
162 (u16) ((flags >> 1) & 0x03);
163 } else if (resource->address.resource_type == ACPI_IO_RANGE) {
164 /* Ranges (_RNG) - flag bits[1:0] */
165
166 resource->address.attribute.io.range_attribute =
167 (u16) (flags & 0x03);
168
169 /* Translations (_TTP and _TRS) - flag bits[5:4] */
170
171 resource->address.attribute.io.translation_attribute =
172 (u16) ((flags >> 4) & 0x03);
173 }
174 }
175
176 /*******************************************************************************
177 *
178 * FUNCTION: acpi_rs_encode_specific_flags
179 *
180 * PARAMETERS: Resource - Address resource data struct
181 *
182 * RETURN: Encoded type-specific flag byte
183 *
184 * DESCRIPTION: Construct a type-specific flag byte from an attribute struct.
185 * Type-specific flags are only defined for the Memory and IO
186 * resource types.
187 *
188 ******************************************************************************/
189
190 static u8 acpi_rs_encode_specific_flags(union acpi_resource_data *resource)
191 {
192 u8 flags = 0;
193
194 ACPI_FUNCTION_ENTRY();
195
196 if (resource->address.resource_type == ACPI_MEMORY_RANGE) {
197 /* Write Status (_RW) - flag bit[0] */
198
199 flags = (u8)
200 (resource->address.attribute.memory.
201 read_write_attribute & 0x01);
202
203 /* Memory Attributes (_MEM) - flag bits[2:1] */
204
205 flags |= (u8)
206 ((resource->address.attribute.memory.
207 cache_attribute & 0x03) << 1);
208 } else if (resource->address.resource_type == ACPI_IO_RANGE) {
209 /* Ranges (_RNG) - flag bits[1:0] */
210
211 flags = (u8)
212 (resource->address.attribute.io.range_attribute & 0x03);
213
214 /* Translations (_TTP and _TRS) - flag bits[5:4] */
215
216 flags |= (u8)
217 ((resource->address.attribute.io.
218 translation_attribute & 0x03) << 4);
219 }
220
221 return (flags);
222 }
223
224 /*******************************************************************************
225 *
226 * FUNCTION: acpi_rs_address16_resource
227 *
228 * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
229 * stream
230 * bytes_consumed - Pointer to where the number of bytes
231 * consumed the byte_stream_buffer is
232 * returned
233 * output_buffer - Pointer to the return data buffer
234 * structure_size - Pointer to where the number of bytes
235 * in the return data struct is returned
236 *
237 * RETURN: Status
238 *
239 * DESCRIPTION: Take the resource byte stream and fill out the appropriate
240 * structure pointed to by the output_buffer. Return the
241 * number of bytes consumed from the byte stream.
242 *
243 ******************************************************************************/
244
245 acpi_status
246 acpi_rs_address16_resource(u8 * byte_stream_buffer,
247 acpi_size * bytes_consumed,
248 u8 ** output_buffer, acpi_size * structure_size)
249 {
250 u32 index;
251 u16 temp16;
252 u8 temp8;
253 u8 *temp_ptr;
254 u8 *buffer = byte_stream_buffer;
255 struct acpi_resource *output_struct = (void *)*output_buffer;
256 acpi_size struct_size =
257 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address16);
258
259 ACPI_FUNCTION_TRACE("rs_address16_resource");
260
261 /* Get the Descriptor Length field */
262
263 buffer += 1;
264 ACPI_MOVE_16_TO_16(&temp16, buffer);
265
266 /* Validate minimum descriptor length */
267
268 if (temp16 < 13) {
269 return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
270 }
271
272 *bytes_consumed = temp16 + 3;
273 output_struct->type = ACPI_RSTYPE_ADDRESS16;
274
275 /* Get the Resource Type (Byte3) */
276
277 buffer += 2;
278 temp8 = *buffer;
279
280 /* Values 0-2 and 0xC0-0xFF are valid */
281
282 if ((temp8 > 2) && (temp8 < 0xC0)) {
283 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
284 }
285
286 output_struct->data.address16.resource_type = temp8;
287
288 /* Get the General Flags (Byte4) */
289
290 buffer += 1;
291 acpi_rs_decode_general_flags(&output_struct->data, *buffer);
292
293 /* Get the Type Specific Flags (Byte5) */
294
295 buffer += 1;
296 acpi_rs_decode_specific_flags(&output_struct->data, *buffer);
297
298 /* Get Granularity (Bytes 6-7) */
299
300 buffer += 1;
301 ACPI_MOVE_16_TO_32(&output_struct->data.address16.granularity, buffer);
302
303 /* Get min_address_range (Bytes 8-9) */
304
305 buffer += 2;
306 ACPI_MOVE_16_TO_32(&output_struct->data.address16.min_address_range,
307 buffer);
308
309 /* Get max_address_range (Bytes 10-11) */
310
311 buffer += 2;
312 ACPI_MOVE_16_TO_32(&output_struct->data.address16.max_address_range,
313 buffer);
314
315 /* Get address_translation_offset (Bytes 12-13) */
316
317 buffer += 2;
318 ACPI_MOVE_16_TO_32(&output_struct->data.address16.
319 address_translation_offset, buffer);
320
321 /* Get address_length (Bytes 14-15) */
322
323 buffer += 2;
324 ACPI_MOVE_16_TO_32(&output_struct->data.address16.address_length,
325 buffer);
326
327 /* Resource Source Index (if present) */
328
329 buffer += 2;
330
331 /*
332 * This will leave us pointing to the Resource Source Index
333 * If it is present, then save it off and calculate the
334 * pointer to where the null terminated string goes:
335 * Each Interrupt takes 32-bits + the 5 bytes of the
336 * stream that are default.
337 *
338 * Note: Some resource descriptors will have an additional null, so
339 * we add 1 to the length.
340 */
341 if (*bytes_consumed > (16 + 1)) {
342 /* Dereference the Index */
343
344 output_struct->data.address16.resource_source.index =
345 (u32) * buffer;
346
347 /* Point to the String */
348
349 buffer += 1;
350
351 /* Point the String pointer to the end of this structure */
352
353 output_struct->data.address16.resource_source.string_ptr =
354 (char *)((u8 *) output_struct + struct_size);
355
356 temp_ptr = (u8 *)
357 output_struct->data.address16.resource_source.string_ptr;
358
359 /* Copy the resource_source string into the buffer */
360
361 index = 0;
362 while (*buffer) {
363 *temp_ptr = *buffer;
364
365 temp_ptr++;
366 buffer++;
367 index++;
368 }
369
370 /* Add the terminating null and set the string length */
371
372 *temp_ptr = 0;
373 output_struct->data.address16.resource_source.string_length =
374 index + 1;
375
376 /*
377 * In order for the struct_size to fall on a 32-bit boundary,
378 * calculate the length of the string and expand the
379 * struct_size to the next 32-bit boundary.
380 */
381 temp8 = (u8) (index + 1);
382 struct_size += ACPI_ROUND_UP_to_32_bITS(temp8);
383 } else {
384 output_struct->data.address16.resource_source.index = 0;
385 output_struct->data.address16.resource_source.string_length = 0;
386 output_struct->data.address16.resource_source.string_ptr = NULL;
387 }
388
389 /* Set the Length parameter */
390
391 output_struct->length = (u32) struct_size;
392
393 /* Return the final size of the structure */
394
395 *structure_size = struct_size;
396 return_ACPI_STATUS(AE_OK);
397 }
398
399 /*******************************************************************************
400 *
401 * FUNCTION: acpi_rs_address16_stream
402 *
403 * PARAMETERS: Resource - Pointer to the resource linked list
404 * output_buffer - Pointer to the user's return buffer
405 * bytes_consumed - Pointer to where the number of bytes
406 * used in the output_buffer is returned
407 *
408 * RETURN: Status
409 *
410 * DESCRIPTION: Take the linked list resource structure and fills in the
411 * the appropriate bytes in a byte stream
412 *
413 ******************************************************************************/
414
415 acpi_status
416 acpi_rs_address16_stream(struct acpi_resource *resource,
417 u8 ** output_buffer, acpi_size * bytes_consumed)
418 {
419 u8 *buffer = *output_buffer;
420 u8 *length_field;
421 acpi_size actual_bytes;
422
423 ACPI_FUNCTION_TRACE("rs_address16_stream");
424
425 /* Set the Descriptor Type field */
426
427 *buffer = ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE;
428 buffer += 1;
429
430 /* Save a pointer to the Length field - to be filled in later */
431
432 length_field = buffer;
433 buffer += 2;
434
435 /* Set the Resource Type (Memory, Io, bus_number) */
436
437 *buffer = (u8) (resource->data.address16.resource_type & 0x03);
438 buffer += 1;
439
440 /* Set the general flags */
441
442 *buffer = acpi_rs_encode_general_flags(&resource->data);
443 buffer += 1;
444
445 /* Set the type specific flags */
446
447 *buffer = acpi_rs_encode_specific_flags(&resource->data);
448 buffer += 1;
449
450 /* Set the address space granularity */
451
452 ACPI_MOVE_32_TO_16(buffer, &resource->data.address16.granularity);
453 buffer += 2;
454
455 /* Set the address range minimum */
456
457 ACPI_MOVE_32_TO_16(buffer, &resource->data.address16.min_address_range);
458 buffer += 2;
459
460 /* Set the address range maximum */
461
462 ACPI_MOVE_32_TO_16(buffer, &resource->data.address16.max_address_range);
463 buffer += 2;
464
465 /* Set the address translation offset */
466
467 ACPI_MOVE_32_TO_16(buffer,
468 &resource->data.address16.
469 address_translation_offset);
470 buffer += 2;
471
472 /* Set the address length */
473
474 ACPI_MOVE_32_TO_16(buffer, &resource->data.address16.address_length);
475 buffer += 2;
476
477 /* Resource Source Index and Resource Source are optional */
478
479 if (resource->data.address16.resource_source.string_length) {
480 *buffer = (u8) resource->data.address16.resource_source.index;
481 buffer += 1;
482
483 /* Copy the resource_source string */
484
485 ACPI_STRCPY((char *)buffer,
486 resource->data.address16.resource_source.
487 string_ptr);
488
489 /*
490 * Buffer needs to be set to the length of the string + one for the
491 * terminating null
492 */
493 buffer +=
494 (acpi_size) (ACPI_STRLEN
495 (resource->data.address16.resource_source.
496 string_ptr) + 1);
497 }
498
499 /* Return the number of bytes consumed in this operation */
500
501 actual_bytes = ACPI_PTR_DIFF(buffer, *output_buffer);
502 *bytes_consumed = actual_bytes;
503
504 /*
505 * Set the length field to the number of bytes consumed
506 * minus the header size (3 bytes)
507 */
508 actual_bytes -= 3;
509 ACPI_MOVE_SIZE_TO_16(length_field, &actual_bytes);
510 return_ACPI_STATUS(AE_OK);
511 }
512
513 /*******************************************************************************
514 *
515 * FUNCTION: acpi_rs_address32_resource
516 *
517 * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
518 * stream
519 * bytes_consumed - Pointer to where the number of bytes
520 * consumed the byte_stream_buffer is
521 * returned
522 * output_buffer - Pointer to the return data buffer
523 * structure_size - Pointer to where the number of bytes
524 * in the return data struct is returned
525 *
526 * RETURN: Status
527 *
528 * DESCRIPTION: Take the resource byte stream and fill out the appropriate
529 * structure pointed to by the output_buffer. Return the
530 * number of bytes consumed from the byte stream.
531 *
532 ******************************************************************************/
533
534 acpi_status
535 acpi_rs_address32_resource(u8 * byte_stream_buffer,
536 acpi_size * bytes_consumed,
537 u8 ** output_buffer, acpi_size * structure_size)
538 {
539 u16 temp16;
540 u8 temp8;
541 u8 *temp_ptr;
542 u32 index;
543 u8 *buffer = byte_stream_buffer;
544 struct acpi_resource *output_struct = (void *)*output_buffer;
545 acpi_size struct_size =
546 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address32);
547
548 ACPI_FUNCTION_TRACE("rs_address32_resource");
549
550 /* Get the Descriptor Length field */
551
552 buffer += 1;
553 ACPI_MOVE_16_TO_16(&temp16, buffer);
554
555 /* Validate minimum descriptor length */
556
557 if (temp16 < 23) {
558 return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
559 }
560
561 *bytes_consumed = temp16 + 3;
562 output_struct->type = ACPI_RSTYPE_ADDRESS32;
563
564 /* Get the Resource Type (Byte3) */
565
566 buffer += 2;
567 temp8 = *buffer;
568
569 /* Values 0-2 and 0xC0-0xFF are valid */
570
571 if ((temp8 > 2) && (temp8 < 0xC0)) {
572 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
573 }
574
575 output_struct->data.address32.resource_type = temp8;
576
577 /* Get the General Flags (Byte4) */
578
579 buffer += 1;
580 acpi_rs_decode_general_flags(&output_struct->data, *buffer);
581
582 /* Get the Type Specific Flags (Byte5) */
583
584 buffer += 1;
585 acpi_rs_decode_specific_flags(&output_struct->data, *buffer);
586
587 /* Get Granularity (Bytes 6-9) */
588
589 buffer += 1;
590 ACPI_MOVE_32_TO_32(&output_struct->data.address32.granularity, buffer);
591
592 /* Get min_address_range (Bytes 10-13) */
593
594 buffer += 4;
595 ACPI_MOVE_32_TO_32(&output_struct->data.address32.min_address_range,
596 buffer);
597
598 /* Get max_address_range (Bytes 14-17) */
599
600 buffer += 4;
601 ACPI_MOVE_32_TO_32(&output_struct->data.address32.max_address_range,
602 buffer);
603
604 /* Get address_translation_offset (Bytes 18-21) */
605
606 buffer += 4;
607 ACPI_MOVE_32_TO_32(&output_struct->data.address32.
608 address_translation_offset, buffer);
609
610 /* Get address_length (Bytes 22-25) */
611
612 buffer += 4;
613 ACPI_MOVE_32_TO_32(&output_struct->data.address32.address_length,
614 buffer);
615
616 /* Resource Source Index (if present) */
617
618 buffer += 4;
619
620 /*
621 * This will leave us pointing to the Resource Source Index
622 * If it is present, then save it off and calculate the
623 * pointer to where the null terminated string goes:
624 *
625 * Note: Some resource descriptors will have an additional null, so
626 * we add 1 to the length.
627 */
628 if (*bytes_consumed > (26 + 1)) {
629 /* Dereference the Index */
630
631 output_struct->data.address32.resource_source.index =
632 (u32) * buffer;
633
634 /* Point to the String */
635
636 buffer += 1;
637
638 /* Point the String pointer to the end of this structure */
639
640 output_struct->data.address32.resource_source.string_ptr =
641 (char *)((u8 *) output_struct + struct_size);
642
643 temp_ptr = (u8 *)
644 output_struct->data.address32.resource_source.string_ptr;
645
646 /* Copy the resource_source string into the buffer */
647
648 index = 0;
649 while (*buffer) {
650 *temp_ptr = *buffer;
651
652 temp_ptr++;
653 buffer++;
654 index++;
655 }
656
657 /* Add the terminating null and set the string length */
658
659 *temp_ptr = 0;
660 output_struct->data.address32.resource_source.string_length =
661 index + 1;
662
663 /*
664 * In order for the struct_size to fall on a 32-bit boundary,
665 * calculate the length of the string and expand the
666 * struct_size to the next 32-bit boundary.
667 */
668 temp8 = (u8) (index + 1);
669 struct_size += ACPI_ROUND_UP_to_32_bITS(temp8);
670 } else {
671 output_struct->data.address32.resource_source.index = 0;
672 output_struct->data.address32.resource_source.string_length = 0;
673 output_struct->data.address32.resource_source.string_ptr = NULL;
674 }
675
676 /* Set the Length parameter */
677
678 output_struct->length = (u32) struct_size;
679
680 /* Return the final size of the structure */
681
682 *structure_size = struct_size;
683 return_ACPI_STATUS(AE_OK);
684 }
685
686 /*******************************************************************************
687 *
688 * FUNCTION: acpi_rs_address32_stream
689 *
690 * PARAMETERS: Resource - Pointer to the resource linked list
691 * output_buffer - Pointer to the user's return buffer
692 * bytes_consumed - Pointer to where the number of bytes
693 * used in the output_buffer is returned
694 *
695 * RETURN: Status
696 *
697 * DESCRIPTION: Take the linked list resource structure and fills in the
698 * the appropriate bytes in a byte stream
699 *
700 ******************************************************************************/
701
702 acpi_status
703 acpi_rs_address32_stream(struct acpi_resource *resource,
704 u8 ** output_buffer, acpi_size * bytes_consumed)
705 {
706 u8 *buffer;
707 u16 *length_field;
708
709 ACPI_FUNCTION_TRACE("rs_address32_stream");
710
711 buffer = *output_buffer;
712
713 /* Set the Descriptor Type field */
714
715 *buffer = ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE;
716 buffer += 1;
717
718 /* Save a pointer to the Length field - to be filled in later */
719
720 length_field = ACPI_CAST_PTR(u16, buffer);
721 buffer += 2;
722
723 /* Set the Resource Type (Memory, Io, bus_number) */
724
725 *buffer = (u8) (resource->data.address32.resource_type & 0x03);
726 buffer += 1;
727
728 /* Set the general flags */
729
730 *buffer = acpi_rs_encode_general_flags(&resource->data);
731 buffer += 1;
732
733 /* Set the type specific flags */
734
735 *buffer = acpi_rs_encode_specific_flags(&resource->data);
736 buffer += 1;
737
738 /* Set the address space granularity */
739
740 ACPI_MOVE_32_TO_32(buffer, &resource->data.address32.granularity);
741 buffer += 4;
742
743 /* Set the address range minimum */
744
745 ACPI_MOVE_32_TO_32(buffer, &resource->data.address32.min_address_range);
746 buffer += 4;
747
748 /* Set the address range maximum */
749
750 ACPI_MOVE_32_TO_32(buffer, &resource->data.address32.max_address_range);
751 buffer += 4;
752
753 /* Set the address translation offset */
754
755 ACPI_MOVE_32_TO_32(buffer,
756 &resource->data.address32.
757 address_translation_offset);
758 buffer += 4;
759
760 /* Set the address length */
761
762 ACPI_MOVE_32_TO_32(buffer, &resource->data.address32.address_length);
763 buffer += 4;
764
765 /* Resource Source Index and Resource Source are optional */
766
767 if (resource->data.address32.resource_source.string_length) {
768 *buffer = (u8) resource->data.address32.resource_source.index;
769 buffer += 1;
770
771 /* Copy the resource_source string */
772
773 ACPI_STRCPY((char *)buffer,
774 resource->data.address32.resource_source.
775 string_ptr);
776
777 /*
778 * Buffer needs to be set to the length of the string + one for the
779 * terminating null
780 */
781 buffer +=
782 (acpi_size) (ACPI_STRLEN
783 (resource->data.address32.resource_source.
784 string_ptr) + 1);
785 }
786
787 /* Return the number of bytes consumed in this operation */
788
789 *bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
790
791 /*
792 * Set the length field to the number of bytes consumed
793 * minus the header size (3 bytes)
794 */
795 *length_field = (u16) (*bytes_consumed - 3);
796 return_ACPI_STATUS(AE_OK);
797 }
798
799 /*******************************************************************************
800 *
801 * FUNCTION: acpi_rs_address64_resource
802 *
803 * PARAMETERS: byte_stream_buffer - Pointer to the resource input byte
804 * stream
805 * bytes_consumed - Pointer to where the number of bytes
806 * consumed the byte_stream_buffer is
807 * returned
808 * output_buffer - Pointer to the return data buffer
809 * structure_size - Pointer to where the number of bytes
810 * in the return data struct is returned
811 *
812 * RETURN: Status
813 *
814 * DESCRIPTION: Take the resource byte stream and fill out the appropriate
815 * structure pointed to by the output_buffer. Return the
816 * number of bytes consumed from the byte stream.
817 *
818 ******************************************************************************/
819
820 acpi_status
821 acpi_rs_address64_resource(u8 * byte_stream_buffer,
822 acpi_size * bytes_consumed,
823 u8 ** output_buffer, acpi_size * structure_size)
824 {
825 u16 temp16;
826 u8 temp8;
827 u8 resource_type;
828 u8 *temp_ptr;
829 u32 index;
830 u8 *buffer = byte_stream_buffer;
831 struct acpi_resource *output_struct = (void *)*output_buffer;
832 acpi_size struct_size =
833 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64);
834
835 ACPI_FUNCTION_TRACE("rs_address64_resource");
836
837 /* Get the Descriptor Type */
838
839 resource_type = *buffer;
840
841 /* Get the Descriptor Length field */
842
843 buffer += 1;
844 ACPI_MOVE_16_TO_16(&temp16, buffer);
845
846 /* Validate minimum descriptor length */
847
848 if (temp16 < 43) {
849 return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
850 }
851
852 *bytes_consumed = temp16 + 3;
853 output_struct->type = ACPI_RSTYPE_ADDRESS64;
854
855 /* Get the Resource Type (Byte3) */
856
857 buffer += 2;
858 temp8 = *buffer;
859
860 /* Values 0-2 and 0xC0-0xFF are valid */
861
862 if ((temp8 > 2) && (temp8 < 0xC0)) {
863 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
864 }
865
866 output_struct->data.address64.resource_type = temp8;
867
868 /* Get the General Flags (Byte4) */
869
870 buffer += 1;
871 acpi_rs_decode_general_flags(&output_struct->data, *buffer);
872
873 /* Get the Type Specific Flags (Byte5) */
874
875 buffer += 1;
876 acpi_rs_decode_specific_flags(&output_struct->data, *buffer);
877
878 if (resource_type == ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE) {
879 /* Move past revision_id and Reserved byte */
880
881 buffer += 2;
882 }
883
884 /* Get Granularity (Bytes 6-13) or (Bytes 8-15) */
885
886 buffer += 1;
887 ACPI_MOVE_64_TO_64(&output_struct->data.address64.granularity, buffer);
888
889 /* Get min_address_range (Bytes 14-21) or (Bytes 16-23) */
890
891 buffer += 8;
892 ACPI_MOVE_64_TO_64(&output_struct->data.address64.min_address_range,
893 buffer);
894
895 /* Get max_address_range (Bytes 22-29) or (Bytes 24-31) */
896
897 buffer += 8;
898 ACPI_MOVE_64_TO_64(&output_struct->data.address64.max_address_range,
899 buffer);
900
901 /* Get address_translation_offset (Bytes 30-37) or (Bytes 32-39) */
902
903 buffer += 8;
904 ACPI_MOVE_64_TO_64(&output_struct->data.address64.
905 address_translation_offset, buffer);
906
907 /* Get address_length (Bytes 38-45) or (Bytes 40-47) */
908
909 buffer += 8;
910 ACPI_MOVE_64_TO_64(&output_struct->data.address64.address_length,
911 buffer);
912
913 output_struct->data.address64.resource_source.index = 0;
914 output_struct->data.address64.resource_source.string_length = 0;
915 output_struct->data.address64.resource_source.string_ptr = NULL;
916
917 if (resource_type == ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE) {
918 /* Get type_specific_attribute (Bytes 48-55) */
919
920 buffer += 8;
921 ACPI_MOVE_64_TO_64(&output_struct->data.address64.
922 type_specific_attributes, buffer);
923 } else {
924 output_struct->data.address64.type_specific_attributes = 0;
925
926 /* Resource Source Index (if present) */
927
928 buffer += 8;
929
930 /*
931 * This will leave us pointing to the Resource Source Index
932 * If it is present, then save it off and calculate the
933 * pointer to where the null terminated string goes:
934 * Each Interrupt takes 32-bits + the 5 bytes of the
935 * stream that are default.
936 *
937 * Note: Some resource descriptors will have an additional null, so
938 * we add 1 to the length.
939 */
940 if (*bytes_consumed > (46 + 1)) {
941 /* Dereference the Index */
942
943 output_struct->data.address64.resource_source.index =
944 (u32) * buffer;
945
946 /* Point to the String */
947
948 buffer += 1;
949
950 /* Point the String pointer to the end of this structure */
951
952 output_struct->data.address64.resource_source.
953 string_ptr =
954 (char *)((u8 *) output_struct + struct_size);
955
956 temp_ptr = (u8 *)
957 output_struct->data.address64.resource_source.
958 string_ptr;
959
960 /* Copy the resource_source string into the buffer */
961
962 index = 0;
963 while (*buffer) {
964 *temp_ptr = *buffer;
965
966 temp_ptr++;
967 buffer++;
968 index++;
969 }
970
971 /*
972 * Add the terminating null and set the string length
973 */
974 *temp_ptr = 0;
975 output_struct->data.address64.resource_source.
976 string_length = index + 1;
977
978 /*
979 * In order for the struct_size to fall on a 32-bit boundary,
980 * calculate the length of the string and expand the
981 * struct_size to the next 32-bit boundary.
982 */
983 temp8 = (u8) (index + 1);
984 struct_size += ACPI_ROUND_UP_to_32_bITS(temp8);
985 }
986 }
987
988 /* Set the Length parameter */
989
990 output_struct->length = (u32) struct_size;
991
992 /* Return the final size of the structure */
993
994 *structure_size = struct_size;
995 return_ACPI_STATUS(AE_OK);
996 }
997
998 /*******************************************************************************
999 *
1000 * FUNCTION: acpi_rs_address64_stream
1001 *
1002 * PARAMETERS: Resource - Pointer to the resource linked list
1003 * output_buffer - Pointer to the user's return buffer
1004 * bytes_consumed - Pointer to where the number of bytes
1005 * used in the output_buffer is returned
1006 *
1007 * RETURN: Status
1008 *
1009 * DESCRIPTION: Take the linked list resource structure and fills in the
1010 * the appropriate bytes in a byte stream
1011 *
1012 ******************************************************************************/
1013
1014 acpi_status
1015 acpi_rs_address64_stream(struct acpi_resource *resource,
1016 u8 ** output_buffer, acpi_size * bytes_consumed)
1017 {
1018 u8 *buffer;
1019 u16 *length_field;
1020
1021 ACPI_FUNCTION_TRACE("rs_address64_stream");
1022
1023 buffer = *output_buffer;
1024
1025 /* Set the Descriptor Type field */
1026
1027 *buffer = ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE;
1028 buffer += 1;
1029
1030 /* Save a pointer to the Length field - to be filled in later */
1031
1032 length_field = ACPI_CAST_PTR(u16, buffer);
1033 buffer += 2;
1034
1035 /* Set the Resource Type (Memory, Io, bus_number) */
1036
1037 *buffer = (u8) (resource->data.address64.resource_type & 0x03);
1038 buffer += 1;
1039
1040 /* Set the general flags */
1041
1042 *buffer = acpi_rs_encode_general_flags(&resource->data);
1043 buffer += 1;
1044
1045 /* Set the type specific flags */
1046
1047 *buffer = acpi_rs_encode_specific_flags(&resource->data);
1048 buffer += 1;
1049
1050 /* Set the address space granularity */
1051
1052 ACPI_MOVE_64_TO_64(buffer, &resource->data.address64.granularity);
1053 buffer += 8;
1054
1055 /* Set the address range minimum */
1056
1057 ACPI_MOVE_64_TO_64(buffer, &resource->data.address64.min_address_range);
1058 buffer += 8;
1059
1060 /* Set the address range maximum */
1061
1062 ACPI_MOVE_64_TO_64(buffer, &resource->data.address64.max_address_range);
1063 buffer += 8;
1064
1065 /* Set the address translation offset */
1066
1067 ACPI_MOVE_64_TO_64(buffer,
1068 &resource->data.address64.
1069 address_translation_offset);
1070 buffer += 8;
1071
1072 /* Set the address length */
1073
1074 ACPI_MOVE_64_TO_64(buffer, &resource->data.address64.address_length);
1075 buffer += 8;
1076
1077 /* Resource Source Index and Resource Source are optional */
1078
1079 if (resource->data.address64.resource_source.string_length) {
1080 *buffer = (u8) resource->data.address64.resource_source.index;
1081 buffer += 1;
1082
1083 /* Copy the resource_source string */
1084
1085 ACPI_STRCPY((char *)buffer,
1086 resource->data.address64.resource_source.
1087 string_ptr);
1088
1089 /*
1090 * Buffer needs to be set to the length of the string + one for the
1091 * terminating null
1092 */
1093 buffer +=
1094 (acpi_size) (ACPI_STRLEN
1095 (resource->data.address64.resource_source.
1096 string_ptr) + 1);
1097 }
1098
1099 /* Return the number of bytes consumed in this operation */
1100
1101 *bytes_consumed = ACPI_PTR_DIFF(buffer, *output_buffer);
1102
1103 /*
1104 * Set the length field to the number of bytes consumed
1105 * minus the header size (3 bytes)
1106 */
1107 *length_field = (u16) (*bytes_consumed - 3);
1108 return_ACPI_STATUS(AE_OK);
1109 }
Linux kernel - Deliverables
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