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Linux 2.6.33-rc8
[linux-2.6/lguest.git] / drivers / acpi / acpica / rsmisc.c
blob5bc49a553284bd3abb7804e73cce1a5bb7e84727
1 /*******************************************************************************
2 *
3 * Module Name: rsmisc - Miscellaneous resource descriptors
4 *
5 ******************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2008, 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 "acresrc.h"
47
48 #define _COMPONENT ACPI_RESOURCES
49 ACPI_MODULE_NAME("rsmisc")
50 #define INIT_RESOURCE_TYPE(i) i->resource_offset
51 #define INIT_RESOURCE_LENGTH(i) i->aml_offset
52 #define INIT_TABLE_LENGTH(i) i->value
53 #define COMPARE_OPCODE(i) i->resource_offset
54 #define COMPARE_TARGET(i) i->aml_offset
55 #define COMPARE_VALUE(i) i->value
56 /*******************************************************************************
57 *
58 * FUNCTION: acpi_rs_convert_aml_to_resource
59 *
60 * PARAMETERS: Resource - Pointer to the resource descriptor
61 * Aml - Where the AML descriptor is returned
62 * Info - Pointer to appropriate conversion table
63 *
64 * RETURN: Status
65 *
66 * DESCRIPTION: Convert an external AML resource descriptor to the corresponding
67 * internal resource descriptor
68 *
69 ******************************************************************************/
70 acpi_status
71 acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
72 union aml_resource *aml,
73 struct acpi_rsconvert_info *info)
74 {
75 acpi_rs_length aml_resource_length;
76 void *source;
77 void *destination;
78 char *target;
79 u8 count;
80 u8 flags_mode = FALSE;
81 u16 item_count = 0;
82 u16 temp16 = 0;
83
84 ACPI_FUNCTION_TRACE(rs_convert_aml_to_resource);
85
86 if (((acpi_size) resource) & 0x3) {
87
88 /* Each internal resource struct is expected to be 32-bit aligned */
89
90 ACPI_WARNING((AE_INFO,
91 "Misaligned resource pointer (get): %p Type %2.2X Len %X",
92 resource, resource->type, resource->length));
93 }
94
95 /* Extract the resource Length field (does not include header length) */
96
97 aml_resource_length = acpi_ut_get_resource_length(aml);
98
99 /*
100 * First table entry must be ACPI_RSC_INITxxx and must contain the
101 * table length (# of table entries)
102 */
103 count = INIT_TABLE_LENGTH(info);
104
105 while (count) {
106 /*
107 * Source is the external AML byte stream buffer,
108 * destination is the internal resource descriptor
109 */
110 source = ACPI_ADD_PTR(void, aml, info->aml_offset);
111 destination =
112 ACPI_ADD_PTR(void, resource, info->resource_offset);
113
114 switch (info->opcode) {
115 case ACPI_RSC_INITGET:
116 /*
117 * Get the resource type and the initial (minimum) length
118 */
119 ACPI_MEMSET(resource, 0, INIT_RESOURCE_LENGTH(info));
120 resource->type = INIT_RESOURCE_TYPE(info);
121 resource->length = INIT_RESOURCE_LENGTH(info);
122 break;
123
124 case ACPI_RSC_INITSET:
125 break;
126
127 case ACPI_RSC_FLAGINIT:
128
129 flags_mode = TRUE;
130 break;
131
132 case ACPI_RSC_1BITFLAG:
133 /*
134 * Mask and shift the flag bit
135 */
136 ACPI_SET8(destination) = (u8)
137 ((ACPI_GET8(source) >> info->value) & 0x01);
138 break;
139
140 case ACPI_RSC_2BITFLAG:
141 /*
142 * Mask and shift the flag bits
143 */
144 ACPI_SET8(destination) = (u8)
145 ((ACPI_GET8(source) >> info->value) & 0x03);
146 break;
147
148 case ACPI_RSC_COUNT:
149
150 item_count = ACPI_GET8(source);
151 ACPI_SET8(destination) = (u8) item_count;
152
153 resource->length = resource->length +
154 (info->value * (item_count - 1));
155 break;
156
157 case ACPI_RSC_COUNT16:
158
159 item_count = aml_resource_length;
160 ACPI_SET16(destination) = item_count;
161
162 resource->length = resource->length +
163 (info->value * (item_count - 1));
164 break;
165
166 case ACPI_RSC_LENGTH:
167
168 resource->length = resource->length + info->value;
169 break;
170
171 case ACPI_RSC_MOVE8:
172 case ACPI_RSC_MOVE16:
173 case ACPI_RSC_MOVE32:
174 case ACPI_RSC_MOVE64:
175 /*
176 * Raw data move. Use the Info value field unless item_count has
177 * been previously initialized via a COUNT opcode
178 */
179 if (info->value) {
180 item_count = info->value;
181 }
182 acpi_rs_move_data(destination, source, item_count,
183 info->opcode);
184 break;
185
186 case ACPI_RSC_SET8:
187
188 ACPI_MEMSET(destination, info->aml_offset, info->value);
189 break;
190
191 case ACPI_RSC_DATA8:
192
193 target = ACPI_ADD_PTR(char, resource, info->value);
194 ACPI_MEMCPY(destination, source, ACPI_GET16(target));
195 break;
196
197 case ACPI_RSC_ADDRESS:
198 /*
199 * Common handler for address descriptor flags
200 */
201 if (!acpi_rs_get_address_common(resource, aml)) {
202 return_ACPI_STATUS
203 (AE_AML_INVALID_RESOURCE_TYPE);
204 }
205 break;
206
207 case ACPI_RSC_SOURCE:
208 /*
209 * Optional resource_source (Index and String)
210 */
211 resource->length +=
212 acpi_rs_get_resource_source(aml_resource_length,
213 info->value,
214 destination, aml, NULL);
215 break;
216
217 case ACPI_RSC_SOURCEX:
218 /*
219 * Optional resource_source (Index and String). This is the more
220 * complicated case used by the Interrupt() macro
221 */
222 target =
223 ACPI_ADD_PTR(char, resource,
224 info->aml_offset + (item_count * 4));
225
226 resource->length +=
227 acpi_rs_get_resource_source(aml_resource_length,
228 (acpi_rs_length) (((item_count - 1) * sizeof(u32)) + info->value), destination, aml, target);
229 break;
230
231 case ACPI_RSC_BITMASK:
232 /*
233 * 8-bit encoded bitmask (DMA macro)
234 */
235 item_count =
236 acpi_rs_decode_bitmask(ACPI_GET8(source),
237 destination);
238 if (item_count) {
239 resource->length += (item_count - 1);
240 }
241
242 target = ACPI_ADD_PTR(char, resource, info->value);
243 ACPI_SET8(target) = (u8) item_count;
244 break;
245
246 case ACPI_RSC_BITMASK16:
247 /*
248 * 16-bit encoded bitmask (IRQ macro)
249 */
250 ACPI_MOVE_16_TO_16(&temp16, source);
251
252 item_count =
253 acpi_rs_decode_bitmask(temp16, destination);
254 if (item_count) {
255 resource->length += (item_count - 1);
256 }
257
258 target = ACPI_ADD_PTR(char, resource, info->value);
259 ACPI_SET8(target) = (u8) item_count;
260 break;
261
262 case ACPI_RSC_EXIT_NE:
263 /*
264 * Control - Exit conversion if not equal
265 */
266 switch (info->resource_offset) {
267 case ACPI_RSC_COMPARE_AML_LENGTH:
268 if (aml_resource_length != info->value) {
269 goto exit;
270 }
271 break;
272
273 case ACPI_RSC_COMPARE_VALUE:
274 if (ACPI_GET8(source) != info->value) {
275 goto exit;
276 }
277 break;
278
279 default:
280
281 ACPI_ERROR((AE_INFO,
282 "Invalid conversion sub-opcode"));
283 return_ACPI_STATUS(AE_BAD_PARAMETER);
284 }
285 break;
286
287 default:
288
289 ACPI_ERROR((AE_INFO, "Invalid conversion opcode"));
290 return_ACPI_STATUS(AE_BAD_PARAMETER);
291 }
292
293 count--;
294 info++;
295 }
296
297 exit:
298 if (!flags_mode) {
299
300 /* Round the resource struct length up to the next boundary (32 or 64) */
301
302 resource->length =
303 (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(resource->length);
304 }
305 return_ACPI_STATUS(AE_OK);
306 }
307
308 /*******************************************************************************
309 *
310 * FUNCTION: acpi_rs_convert_resource_to_aml
311 *
312 * PARAMETERS: Resource - Pointer to the resource descriptor
313 * Aml - Where the AML descriptor is returned
314 * Info - Pointer to appropriate conversion table
315 *
316 * RETURN: Status
317 *
318 * DESCRIPTION: Convert an internal resource descriptor to the corresponding
319 * external AML resource descriptor.
320 *
321 ******************************************************************************/
322
323 acpi_status
324 acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
325 union aml_resource *aml,
326 struct acpi_rsconvert_info *info)
327 {
328 void *source = NULL;
329 void *destination;
330 acpi_rsdesc_size aml_length = 0;
331 u8 count;
332 u16 temp16 = 0;
333 u16 item_count = 0;
334
335 ACPI_FUNCTION_TRACE(rs_convert_resource_to_aml);
336
337 /*
338 * First table entry must be ACPI_RSC_INITxxx and must contain the
339 * table length (# of table entries)
340 */
341 count = INIT_TABLE_LENGTH(info);
342
343 while (count) {
344 /*
345 * Source is the internal resource descriptor,
346 * destination is the external AML byte stream buffer
347 */
348 source = ACPI_ADD_PTR(void, resource, info->resource_offset);
349 destination = ACPI_ADD_PTR(void, aml, info->aml_offset);
350
351 switch (info->opcode) {
352 case ACPI_RSC_INITSET:
353
354 ACPI_MEMSET(aml, 0, INIT_RESOURCE_LENGTH(info));
355 aml_length = INIT_RESOURCE_LENGTH(info);
356 acpi_rs_set_resource_header(INIT_RESOURCE_TYPE(info),
357 aml_length, aml);
358 break;
359
360 case ACPI_RSC_INITGET:
361 break;
362
363 case ACPI_RSC_FLAGINIT:
364 /*
365 * Clear the flag byte
366 */
367 ACPI_SET8(destination) = 0;
368 break;
369
370 case ACPI_RSC_1BITFLAG:
371 /*
372 * Mask and shift the flag bit
373 */
374 ACPI_SET8(destination) |= (u8)
375 ((ACPI_GET8(source) & 0x01) << info->value);
376 break;
377
378 case ACPI_RSC_2BITFLAG:
379 /*
380 * Mask and shift the flag bits
381 */
382 ACPI_SET8(destination) |= (u8)
383 ((ACPI_GET8(source) & 0x03) << info->value);
384 break;
385
386 case ACPI_RSC_COUNT:
387
388 item_count = ACPI_GET8(source);
389 ACPI_SET8(destination) = (u8) item_count;
390
391 aml_length =
392 (u16) (aml_length +
393 (info->value * (item_count - 1)));
394 break;
395
396 case ACPI_RSC_COUNT16:
397
398 item_count = ACPI_GET16(source);
399 aml_length = (u16) (aml_length + item_count);
400 acpi_rs_set_resource_length(aml_length, aml);
401 break;
402
403 case ACPI_RSC_LENGTH:
404
405 acpi_rs_set_resource_length(info->value, aml);
406 break;
407
408 case ACPI_RSC_MOVE8:
409 case ACPI_RSC_MOVE16:
410 case ACPI_RSC_MOVE32:
411 case ACPI_RSC_MOVE64:
412
413 if (info->value) {
414 item_count = info->value;
415 }
416 acpi_rs_move_data(destination, source, item_count,
417 info->opcode);
418 break;
419
420 case ACPI_RSC_ADDRESS:
421
422 /* Set the Resource Type, General Flags, and Type-Specific Flags */
423
424 acpi_rs_set_address_common(aml, resource);
425 break;
426
427 case ACPI_RSC_SOURCEX:
428 /*
429 * Optional resource_source (Index and String)
430 */
431 aml_length =
432 acpi_rs_set_resource_source(aml, (acpi_rs_length)
433 aml_length, source);
434 acpi_rs_set_resource_length(aml_length, aml);
435 break;
436
437 case ACPI_RSC_SOURCE:
438 /*
439 * Optional resource_source (Index and String). This is the more
440 * complicated case used by the Interrupt() macro
441 */
442 aml_length =
443 acpi_rs_set_resource_source(aml, info->value,
444 source);
445 acpi_rs_set_resource_length(aml_length, aml);
446 break;
447
448 case ACPI_RSC_BITMASK:
449 /*
450 * 8-bit encoded bitmask (DMA macro)
451 */
452 ACPI_SET8(destination) = (u8)
453 acpi_rs_encode_bitmask(source,
454 *ACPI_ADD_PTR(u8, resource,
455 info->value));
456 break;
457
458 case ACPI_RSC_BITMASK16:
459 /*
460 * 16-bit encoded bitmask (IRQ macro)
461 */
462 temp16 = acpi_rs_encode_bitmask(source,
463 *ACPI_ADD_PTR(u8,
464 resource,
465 info->
466 value));
467 ACPI_MOVE_16_TO_16(destination, &temp16);
468 break;
469
470 case ACPI_RSC_EXIT_LE:
471 /*
472 * Control - Exit conversion if less than or equal
473 */
474 if (item_count <= info->value) {
475 goto exit;
476 }
477 break;
478
479 case ACPI_RSC_EXIT_NE:
480 /*
481 * Control - Exit conversion if not equal
482 */
483 switch (COMPARE_OPCODE(info)) {
484 case ACPI_RSC_COMPARE_VALUE:
485
486 if (*ACPI_ADD_PTR(u8, resource,
487 COMPARE_TARGET(info)) !=
488 COMPARE_VALUE(info)) {
489 goto exit;
490 }
491 break;
492
493 default:
494
495 ACPI_ERROR((AE_INFO,
496 "Invalid conversion sub-opcode"));
497 return_ACPI_STATUS(AE_BAD_PARAMETER);
498 }
499 break;
500
501 case ACPI_RSC_EXIT_EQ:
502 /*
503 * Control - Exit conversion if equal
504 */
505 if (*ACPI_ADD_PTR(u8, resource,
506 COMPARE_TARGET(info)) ==
507 COMPARE_VALUE(info)) {
508 goto exit;
509 }
510 break;
511
512 default:
513
514 ACPI_ERROR((AE_INFO, "Invalid conversion opcode"));
515 return_ACPI_STATUS(AE_BAD_PARAMETER);
516 }
517
518 count--;
519 info++;
520 }
521
522 exit:
523 return_ACPI_STATUS(AE_OK);
524 }
525
526 #if 0
527 /* Previous resource validations */
528
529 if (aml->ext_address64.revision_iD != AML_RESOURCE_EXTENDED_ADDRESS_REVISION) {
530 return_ACPI_STATUS(AE_SUPPORT);
531 }
532
533 if (resource->data.start_dpf.performance_robustness >= 3) {
534 return_ACPI_STATUS(AE_AML_BAD_RESOURCE_VALUE);
535 }
536
537 if (((aml->irq.flags & 0x09) == 0x00) || ((aml->irq.flags & 0x09) == 0x09)) {
538 /*
539 * Only [active_high, edge_sensitive] or [active_low, level_sensitive]
540 * polarity/trigger interrupts are allowed (ACPI spec, section
541 * "IRQ Format"), so 0x00 and 0x09 are illegal.
542 */
543 ACPI_ERROR((AE_INFO,
544 "Invalid interrupt polarity/trigger in resource list, %X",
545 aml->irq.flags));
546 return_ACPI_STATUS(AE_BAD_DATA);
547 }
548
549 resource->data.extended_irq.interrupt_count = temp8;
550 if (temp8 < 1) {
551
552 /* Must have at least one IRQ */
553
554 return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH);
555 }
556
557 if (resource->data.dma.transfer == 0x03) {
558 ACPI_ERROR((AE_INFO, "Invalid DMA.Transfer preference (3)"));
559 return_ACPI_STATUS(AE_BAD_DATA);
560 }
561 #endif
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