ia64/linux-2.6.18-xen.hg

view drivers/acpi/utilities/utresrc.c @ 912:dd42cdb0ab89

[IA64] Build blktap2 driver by default in x86 builds.

add CONFIG_XEN_BLKDEV_TAP2=y to buildconfigs/linux-defconfig_xen_ia64.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
author Isaku Yamahata <yamahata@valinux.co.jp>
date Mon Jun 29 12:09:16 2009 +0900 (2009-06-29)
parents 831230e53067
children
line source
1 /*******************************************************************************
2 *
3 * Module Name: utresrc - Resource managment utilities
4 *
5 ******************************************************************************/
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 */
44 #include <acpi/acpi.h>
45 #include <acpi/amlresrc.h>
47 #define _COMPONENT ACPI_UTILITIES
48 ACPI_MODULE_NAME("utresrc")
50 #if defined(ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER)
51 /*
52 * Strings used to decode resource descriptors.
53 * Used by both the disasssembler and the debugger resource dump routines
54 */
55 const char *acpi_gbl_bm_decode[] = {
56 "NotBusMaster",
57 "BusMaster"
58 };
60 const char *acpi_gbl_config_decode[] = {
61 "0 - Good Configuration",
62 "1 - Acceptable Configuration",
63 "2 - Suboptimal Configuration",
64 "3 - ***Invalid Configuration***",
65 };
67 const char *acpi_gbl_consume_decode[] = {
68 "ResourceProducer",
69 "ResourceConsumer"
70 };
72 const char *acpi_gbl_dec_decode[] = {
73 "PosDecode",
74 "SubDecode"
75 };
77 const char *acpi_gbl_he_decode[] = {
78 "Level",
79 "Edge"
80 };
82 const char *acpi_gbl_io_decode[] = {
83 "Decode10",
84 "Decode16"
85 };
87 const char *acpi_gbl_ll_decode[] = {
88 "ActiveHigh",
89 "ActiveLow"
90 };
92 const char *acpi_gbl_max_decode[] = {
93 "MaxNotFixed",
94 "MaxFixed"
95 };
97 const char *acpi_gbl_mem_decode[] = {
98 "NonCacheable",
99 "Cacheable",
100 "WriteCombining",
101 "Prefetchable"
102 };
104 const char *acpi_gbl_min_decode[] = {
105 "MinNotFixed",
106 "MinFixed"
107 };
109 const char *acpi_gbl_mtp_decode[] = {
110 "AddressRangeMemory",
111 "AddressRangeReserved",
112 "AddressRangeACPI",
113 "AddressRangeNVS"
114 };
116 const char *acpi_gbl_rng_decode[] = {
117 "InvalidRanges",
118 "NonISAOnlyRanges",
119 "ISAOnlyRanges",
120 "EntireRange"
121 };
123 const char *acpi_gbl_rw_decode[] = {
124 "ReadOnly",
125 "ReadWrite"
126 };
128 const char *acpi_gbl_shr_decode[] = {
129 "Exclusive",
130 "Shared"
131 };
133 const char *acpi_gbl_siz_decode[] = {
134 "Transfer8",
135 "Transfer8_16",
136 "Transfer16",
137 "InvalidSize"
138 };
140 const char *acpi_gbl_trs_decode[] = {
141 "DenseTranslation",
142 "SparseTranslation"
143 };
145 const char *acpi_gbl_ttp_decode[] = {
146 "TypeStatic",
147 "TypeTranslation"
148 };
150 const char *acpi_gbl_typ_decode[] = {
151 "Compatibility",
152 "TypeA",
153 "TypeB",
154 "TypeF"
155 };
157 #endif
159 /*
160 * Base sizes of the raw AML resource descriptors, indexed by resource type.
161 * Zero indicates a reserved (and therefore invalid) resource type.
162 */
163 const u8 acpi_gbl_resource_aml_sizes[] = {
164 /* Small descriptors */
166 0,
167 0,
168 0,
169 0,
170 ACPI_AML_SIZE_SMALL(struct aml_resource_irq),
171 ACPI_AML_SIZE_SMALL(struct aml_resource_dma),
172 ACPI_AML_SIZE_SMALL(struct aml_resource_start_dependent),
173 ACPI_AML_SIZE_SMALL(struct aml_resource_end_dependent),
174 ACPI_AML_SIZE_SMALL(struct aml_resource_io),
175 ACPI_AML_SIZE_SMALL(struct aml_resource_fixed_io),
176 0,
177 0,
178 0,
179 0,
180 ACPI_AML_SIZE_SMALL(struct aml_resource_vendor_small),
181 ACPI_AML_SIZE_SMALL(struct aml_resource_end_tag),
183 /* Large descriptors */
185 0,
186 ACPI_AML_SIZE_LARGE(struct aml_resource_memory24),
187 ACPI_AML_SIZE_LARGE(struct aml_resource_generic_register),
188 0,
189 ACPI_AML_SIZE_LARGE(struct aml_resource_vendor_large),
190 ACPI_AML_SIZE_LARGE(struct aml_resource_memory32),
191 ACPI_AML_SIZE_LARGE(struct aml_resource_fixed_memory32),
192 ACPI_AML_SIZE_LARGE(struct aml_resource_address32),
193 ACPI_AML_SIZE_LARGE(struct aml_resource_address16),
194 ACPI_AML_SIZE_LARGE(struct aml_resource_extended_irq),
195 ACPI_AML_SIZE_LARGE(struct aml_resource_address64),
196 ACPI_AML_SIZE_LARGE(struct aml_resource_extended_address64)
197 };
199 /*
200 * Resource types, used to validate the resource length field.
201 * The length of fixed-length types must match exactly, variable
202 * lengths must meet the minimum required length, etc.
203 * Zero indicates a reserved (and therefore invalid) resource type.
204 */
205 static const u8 acpi_gbl_resource_types[] = {
206 /* Small descriptors */
208 0,
209 0,
210 0,
211 0,
212 ACPI_SMALL_VARIABLE_LENGTH,
213 ACPI_FIXED_LENGTH,
214 ACPI_SMALL_VARIABLE_LENGTH,
215 ACPI_FIXED_LENGTH,
216 ACPI_FIXED_LENGTH,
217 ACPI_FIXED_LENGTH,
218 0,
219 0,
220 0,
221 0,
222 ACPI_VARIABLE_LENGTH,
223 ACPI_FIXED_LENGTH,
225 /* Large descriptors */
227 0,
228 ACPI_FIXED_LENGTH,
229 ACPI_FIXED_LENGTH,
230 0,
231 ACPI_VARIABLE_LENGTH,
232 ACPI_FIXED_LENGTH,
233 ACPI_FIXED_LENGTH,
234 ACPI_VARIABLE_LENGTH,
235 ACPI_VARIABLE_LENGTH,
236 ACPI_VARIABLE_LENGTH,
237 ACPI_VARIABLE_LENGTH,
238 ACPI_FIXED_LENGTH
239 };
241 /*******************************************************************************
242 *
243 * FUNCTION: acpi_ut_walk_aml_resources
244 *
245 * PARAMETERS: Aml - Pointer to the raw AML resource template
246 * aml_length - Length of the entire template
247 * user_function - Called once for each descriptor found. If
248 * NULL, a pointer to the end_tag is returned
249 * Context - Passed to user_function
250 *
251 * RETURN: Status
252 *
253 * DESCRIPTION: Walk a raw AML resource list(buffer). User function called
254 * once for each resource found.
255 *
256 ******************************************************************************/
258 acpi_status
259 acpi_ut_walk_aml_resources(u8 * aml,
260 acpi_size aml_length,
261 acpi_walk_aml_callback user_function, void **context)
262 {
263 acpi_status status;
264 u8 *end_aml;
265 u8 resource_index;
266 u32 length;
267 u32 offset = 0;
269 ACPI_FUNCTION_TRACE(ut_walk_aml_resources);
271 /* The absolute minimum resource template is one end_tag descriptor */
273 if (aml_length < sizeof(struct aml_resource_end_tag)) {
274 return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
275 }
277 /* Point to the end of the resource template buffer */
279 end_aml = aml + aml_length;
281 /* Walk the byte list, abort on any invalid descriptor type or length */
283 while (aml < end_aml) {
285 /* Validate the Resource Type and Resource Length */
287 status = acpi_ut_validate_resource(aml, &resource_index);
288 if (ACPI_FAILURE(status)) {
289 return_ACPI_STATUS(status);
290 }
292 /* Get the length of this descriptor */
294 length = acpi_ut_get_descriptor_length(aml);
296 /* Invoke the user function */
298 if (user_function) {
299 status =
300 user_function(aml, length, offset, resource_index,
301 context);
302 if (ACPI_FAILURE(status)) {
303 return (status);
304 }
305 }
307 /* An end_tag descriptor terminates this resource template */
309 if (acpi_ut_get_resource_type(aml) ==
310 ACPI_RESOURCE_NAME_END_TAG) {
311 /*
312 * There must be at least one more byte in the buffer for
313 * the 2nd byte of the end_tag
314 */
315 if ((aml + 1) >= end_aml) {
316 return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
317 }
319 /* Return the pointer to the end_tag if requested */
321 if (!user_function) {
322 *context = aml;
323 }
325 /* Normal exit */
327 return_ACPI_STATUS(AE_OK);
328 }
330 aml += length;
331 offset += length;
332 }
334 /* Did not find an end_tag descriptor */
336 return (AE_AML_NO_RESOURCE_END_TAG);
337 }
339 /*******************************************************************************
340 *
341 * FUNCTION: acpi_ut_validate_resource
342 *
343 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
344 * return_index - Where the resource index is returned. NULL
345 * if the index is not required.
346 *
347 * RETURN: Status, and optionally the Index into the global resource tables
348 *
349 * DESCRIPTION: Validate an AML resource descriptor by checking the Resource
350 * Type and Resource Length. Returns an index into the global
351 * resource information/dispatch tables for later use.
352 *
353 ******************************************************************************/
355 acpi_status acpi_ut_validate_resource(void *aml, u8 * return_index)
356 {
357 u8 resource_type;
358 u8 resource_index;
359 acpi_rs_length resource_length;
360 acpi_rs_length minimum_resource_length;
362 ACPI_FUNCTION_ENTRY();
364 /*
365 * 1) Validate the resource_type field (Byte 0)
366 */
367 resource_type = ACPI_GET8(aml);
369 /*
370 * Byte 0 contains the descriptor name (Resource Type)
371 * Examine the large/small bit in the resource header
372 */
373 if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
375 /* Verify the large resource type (name) against the max */
377 if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
378 return (AE_AML_INVALID_RESOURCE_TYPE);
379 }
381 /*
382 * Large Resource Type -- bits 6:0 contain the name
383 * Translate range 0x80-0x8B to index range 0x10-0x1B
384 */
385 resource_index = (u8) (resource_type - 0x70);
386 } else {
387 /*
388 * Small Resource Type -- bits 6:3 contain the name
389 * Shift range to index range 0x00-0x0F
390 */
391 resource_index = (u8)
392 ((resource_type & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3);
393 }
395 /* Check validity of the resource type, zero indicates name is invalid */
397 if (!acpi_gbl_resource_types[resource_index]) {
398 return (AE_AML_INVALID_RESOURCE_TYPE);
399 }
401 /*
402 * 2) Validate the resource_length field. This ensures that the length
403 * is at least reasonable, and guarantees that it is non-zero.
404 */
405 resource_length = acpi_ut_get_resource_length(aml);
406 minimum_resource_length = acpi_gbl_resource_aml_sizes[resource_index];
408 /* Validate based upon the type of resource - fixed length or variable */
410 switch (acpi_gbl_resource_types[resource_index]) {
411 case ACPI_FIXED_LENGTH:
413 /* Fixed length resource, length must match exactly */
415 if (resource_length != minimum_resource_length) {
416 return (AE_AML_BAD_RESOURCE_LENGTH);
417 }
418 break;
420 case ACPI_VARIABLE_LENGTH:
422 /* Variable length resource, length must be at least the minimum */
424 if (resource_length < minimum_resource_length) {
425 return (AE_AML_BAD_RESOURCE_LENGTH);
426 }
427 break;
429 case ACPI_SMALL_VARIABLE_LENGTH:
431 /* Small variable length resource, length can be (Min) or (Min-1) */
433 if ((resource_length > minimum_resource_length) ||
434 (resource_length < (minimum_resource_length - 1))) {
435 return (AE_AML_BAD_RESOURCE_LENGTH);
436 }
437 break;
439 default:
441 /* Shouldn't happen (because of validation earlier), but be sure */
443 return (AE_AML_INVALID_RESOURCE_TYPE);
444 }
446 /* Optionally return the resource table index */
448 if (return_index) {
449 *return_index = resource_index;
450 }
452 return (AE_OK);
453 }
455 /*******************************************************************************
456 *
457 * FUNCTION: acpi_ut_get_resource_type
458 *
459 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
460 *
461 * RETURN: The Resource Type with no extraneous bits (except the
462 * Large/Small descriptor bit -- this is left alone)
463 *
464 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
465 * a resource descriptor.
466 *
467 ******************************************************************************/
469 u8 acpi_ut_get_resource_type(void *aml)
470 {
471 ACPI_FUNCTION_ENTRY();
473 /*
474 * Byte 0 contains the descriptor name (Resource Type)
475 * Examine the large/small bit in the resource header
476 */
477 if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
479 /* Large Resource Type -- bits 6:0 contain the name */
481 return (ACPI_GET8(aml));
482 } else {
483 /* Small Resource Type -- bits 6:3 contain the name */
485 return ((u8) (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
486 }
487 }
489 /*******************************************************************************
490 *
491 * FUNCTION: acpi_ut_get_resource_length
492 *
493 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
494 *
495 * RETURN: Byte Length
496 *
497 * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
498 * definition, this does not include the size of the descriptor
499 * header or the length field itself.
500 *
501 ******************************************************************************/
503 u16 acpi_ut_get_resource_length(void *aml)
504 {
505 acpi_rs_length resource_length;
507 ACPI_FUNCTION_ENTRY();
509 /*
510 * Byte 0 contains the descriptor name (Resource Type)
511 * Examine the large/small bit in the resource header
512 */
513 if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
515 /* Large Resource type -- bytes 1-2 contain the 16-bit length */
517 ACPI_MOVE_16_TO_16(&resource_length, ACPI_ADD_PTR(u8, aml, 1));
519 } else {
520 /* Small Resource type -- bits 2:0 of byte 0 contain the length */
522 resource_length = (u16) (ACPI_GET8(aml) &
523 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
524 }
526 return (resource_length);
527 }
529 /*******************************************************************************
530 *
531 * FUNCTION: acpi_ut_get_resource_header_length
532 *
533 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
534 *
535 * RETURN: Length of the AML header (depends on large/small descriptor)
536 *
537 * DESCRIPTION: Get the length of the header for this resource.
538 *
539 ******************************************************************************/
541 u8 acpi_ut_get_resource_header_length(void *aml)
542 {
543 ACPI_FUNCTION_ENTRY();
545 /* Examine the large/small bit in the resource header */
547 if (ACPI_GET8(aml) & ACPI_RESOURCE_NAME_LARGE) {
548 return (sizeof(struct aml_resource_large_header));
549 } else {
550 return (sizeof(struct aml_resource_small_header));
551 }
552 }
554 /*******************************************************************************
555 *
556 * FUNCTION: acpi_ut_get_descriptor_length
557 *
558 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor
559 *
560 * RETURN: Byte length
561 *
562 * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
563 * length of the descriptor header and the length field itself.
564 * Used to walk descriptor lists.
565 *
566 ******************************************************************************/
568 u32 acpi_ut_get_descriptor_length(void *aml)
569 {
570 ACPI_FUNCTION_ENTRY();
572 /*
573 * Get the Resource Length (does not include header length) and add
574 * the header length (depends on if this is a small or large resource)
575 */
576 return (acpi_ut_get_resource_length(aml) +
577 acpi_ut_get_resource_header_length(aml));
578 }
580 /*******************************************************************************
581 *
582 * FUNCTION: acpi_ut_get_resource_end_tag
583 *
584 * PARAMETERS: obj_desc - The resource template buffer object
585 * end_tag - Where the pointer to the end_tag is returned
586 *
587 * RETURN: Status, pointer to the end tag
588 *
589 * DESCRIPTION: Find the end_tag resource descriptor in an AML resource template
590 * Note: allows a buffer length of zero.
591 *
592 ******************************************************************************/
594 acpi_status
595 acpi_ut_get_resource_end_tag(union acpi_operand_object * obj_desc,
596 u8 ** end_tag)
597 {
598 acpi_status status;
600 ACPI_FUNCTION_TRACE(ut_get_resource_end_tag);
602 /* Allow a buffer length of zero */
604 if (!obj_desc->buffer.length) {
605 *end_tag = obj_desc->buffer.pointer;
606 return_ACPI_STATUS(AE_OK);
607 }
609 /* Validate the template and get a pointer to the end_tag */
611 status = acpi_ut_walk_aml_resources(obj_desc->buffer.pointer,
612 obj_desc->buffer.length, NULL,
613 (void **)end_tag);
615 return_ACPI_STATUS(status);
616 }