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Linux kernel mirror (for testing)
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linux
1/*******************************************************************************
2 *
3 * Module Name: rslist - Linked list utilities
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
45#include <acpi/acpi.h>
46#include <acpi/acresrc.h>
47
48#define _COMPONENT ACPI_RESOURCES
49 ACPI_MODULE_NAME ("rslist")
50
51
52/*******************************************************************************
53 *
54 * FUNCTION: acpi_rs_get_resource_type
55 *
56 * PARAMETERS: resource_start_byte - Byte 0 of a resource descriptor
57 *
58 * RETURN: The Resource Type (Name) with no extraneous bits
59 *
60 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
61 * a resource descriptor.
62 *
63 ******************************************************************************/
64
65u8
66acpi_rs_get_resource_type (
67 u8 resource_start_byte)
68{
69
70 ACPI_FUNCTION_ENTRY ();
71
72
73 /*
74 * Determine if this is a small or large resource
75 */
76 switch (resource_start_byte & ACPI_RDESC_TYPE_MASK) {
77 case ACPI_RDESC_TYPE_SMALL:
78
79 /*
80 * Small Resource Type -- Only bits 6:3 are valid
81 */
82 return ((u8) (resource_start_byte & ACPI_RDESC_SMALL_MASK));
83
84
85 case ACPI_RDESC_TYPE_LARGE:
86
87 /*
88 * Large Resource Type -- All bits are valid
89 */
90 return (resource_start_byte);
91
92
93 default:
94 /* No other types of resource descriptor */
95 break;
96 }
97
98 return (0xFF);
99}
100
101
102/*******************************************************************************
103 *
104 * FUNCTION: acpi_rs_byte_stream_to_list
105 *
106 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
107 * byte_stream_buffer_length - Length of byte_stream_buffer
108 * output_buffer - Pointer to the buffer that will
109 * contain the output structures
110 *
111 * RETURN: Status
112 *
113 * DESCRIPTION: Takes the resource byte stream and parses it, creating a
114 * linked list of resources in the caller's output buffer
115 *
116 ******************************************************************************/
117
118acpi_status
119acpi_rs_byte_stream_to_list (
120 u8 *byte_stream_buffer,
121 u32 byte_stream_buffer_length,
122 u8 *output_buffer)
123{
124 acpi_status status;
125 acpi_size bytes_parsed = 0;
126 u8 resource_type = 0;
127 acpi_size bytes_consumed = 0;
128 u8 *buffer = output_buffer;
129 acpi_size structure_size = 0;
130 u8 end_tag_processed = FALSE;
131 struct acpi_resource *resource;
132
133 ACPI_FUNCTION_TRACE ("rs_byte_stream_to_list");
134
135
136 while (bytes_parsed < byte_stream_buffer_length &&
137 !end_tag_processed) {
138 /*
139 * The next byte in the stream is the resource type
140 */
141 resource_type = acpi_rs_get_resource_type (*byte_stream_buffer);
142
143 switch (resource_type) {
144 case ACPI_RDESC_TYPE_MEMORY_24:
145 /*
146 * 24-Bit Memory Resource
147 */
148 status = acpi_rs_memory24_resource (byte_stream_buffer,
149 &bytes_consumed, &buffer, &structure_size);
150 break;
151
152
153 case ACPI_RDESC_TYPE_LARGE_VENDOR:
154 /*
155 * Vendor Defined Resource
156 */
157 status = acpi_rs_vendor_resource (byte_stream_buffer,
158 &bytes_consumed, &buffer, &structure_size);
159 break;
160
161
162 case ACPI_RDESC_TYPE_MEMORY_32:
163 /*
164 * 32-Bit Memory Range Resource
165 */
166 status = acpi_rs_memory32_range_resource (byte_stream_buffer,
167 &bytes_consumed, &buffer, &structure_size);
168 break;
169
170
171 case ACPI_RDESC_TYPE_FIXED_MEMORY_32:
172 /*
173 * 32-Bit Fixed Memory Resource
174 */
175 status = acpi_rs_fixed_memory32_resource (byte_stream_buffer,
176 &bytes_consumed, &buffer, &structure_size);
177 break;
178
179
180 case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
181 case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE:
182 /*
183 * 64-Bit Address Resource
184 */
185 status = acpi_rs_address64_resource (byte_stream_buffer,
186 &bytes_consumed, &buffer, &structure_size);
187 break;
188
189
190 case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
191 /*
192 * 32-Bit Address Resource
193 */
194 status = acpi_rs_address32_resource (byte_stream_buffer,
195 &bytes_consumed, &buffer, &structure_size);
196 break;
197
198
199 case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
200 /*
201 * 16-Bit Address Resource
202 */
203 status = acpi_rs_address16_resource (byte_stream_buffer,
204 &bytes_consumed, &buffer, &structure_size);
205 break;
206
207
208 case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
209 /*
210 * Extended IRQ
211 */
212 status = acpi_rs_extended_irq_resource (byte_stream_buffer,
213 &bytes_consumed, &buffer, &structure_size);
214 break;
215
216
217 case ACPI_RDESC_TYPE_IRQ_FORMAT:
218 /*
219 * IRQ Resource
220 */
221 status = acpi_rs_irq_resource (byte_stream_buffer,
222 &bytes_consumed, &buffer, &structure_size);
223 break;
224
225
226 case ACPI_RDESC_TYPE_DMA_FORMAT:
227 /*
228 * DMA Resource
229 */
230 status = acpi_rs_dma_resource (byte_stream_buffer,
231 &bytes_consumed, &buffer, &structure_size);
232 break;
233
234
235 case ACPI_RDESC_TYPE_START_DEPENDENT:
236 /*
237 * Start Dependent Functions Resource
238 */
239 status = acpi_rs_start_depend_fns_resource (byte_stream_buffer,
240 &bytes_consumed, &buffer, &structure_size);
241 break;
242
243
244 case ACPI_RDESC_TYPE_END_DEPENDENT:
245 /*
246 * End Dependent Functions Resource
247 */
248 status = acpi_rs_end_depend_fns_resource (byte_stream_buffer,
249 &bytes_consumed, &buffer, &structure_size);
250 break;
251
252
253 case ACPI_RDESC_TYPE_IO_PORT:
254 /*
255 * IO Port Resource
256 */
257 status = acpi_rs_io_resource (byte_stream_buffer,
258 &bytes_consumed, &buffer, &structure_size);
259 break;
260
261
262 case ACPI_RDESC_TYPE_FIXED_IO_PORT:
263 /*
264 * Fixed IO Port Resource
265 */
266 status = acpi_rs_fixed_io_resource (byte_stream_buffer,
267 &bytes_consumed, &buffer, &structure_size);
268 break;
269
270
271 case ACPI_RDESC_TYPE_SMALL_VENDOR:
272 /*
273 * Vendor Specific Resource
274 */
275 status = acpi_rs_vendor_resource (byte_stream_buffer,
276 &bytes_consumed, &buffer, &structure_size);
277 break;
278
279
280 case ACPI_RDESC_TYPE_END_TAG:
281 /*
282 * End Tag
283 */
284 end_tag_processed = TRUE;
285 status = acpi_rs_end_tag_resource (byte_stream_buffer,
286 &bytes_consumed, &buffer, &structure_size);
287 break;
288
289
290 default:
291 /*
292 * Invalid/Unknown resource type
293 */
294 status = AE_AML_INVALID_RESOURCE_TYPE;
295 break;
296 }
297
298 if (ACPI_FAILURE (status)) {
299 return_ACPI_STATUS (status);
300 }
301
302 /*
303 * Update the return value and counter
304 */
305 bytes_parsed += bytes_consumed;
306
307 /*
308 * Set the byte stream to point to the next resource
309 */
310 byte_stream_buffer += bytes_consumed;
311
312 /*
313 * Set the Buffer to the next structure
314 */
315 resource = ACPI_CAST_PTR (struct acpi_resource, buffer);
316 resource->length = (u32) ACPI_ALIGN_RESOURCE_SIZE (resource->length);
317 buffer += ACPI_ALIGN_RESOURCE_SIZE (structure_size);
318
319 } /* end while */
320
321 /*
322 * Check the reason for exiting the while loop
323 */
324 if (!end_tag_processed) {
325 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG);
326 }
327
328 return_ACPI_STATUS (AE_OK);
329}
330
331
332/*******************************************************************************
333 *
334 * FUNCTION: acpi_rs_list_to_byte_stream
335 *
336 * PARAMETERS: linked_list - Pointer to the resource linked list
337 * byte_steam_size_needed - Calculated size of the byte stream
338 * needed from calling
339 * acpi_rs_get_byte_stream_length()
340 * The size of the output_buffer is
341 * guaranteed to be >=
342 * byte_stream_size_needed
343 * output_buffer - Pointer to the buffer that will
344 * contain the byte stream
345 *
346 * RETURN: Status
347 *
348 * DESCRIPTION: Takes the resource linked list and parses it, creating a
349 * byte stream of resources in the caller's output buffer
350 *
351 ******************************************************************************/
352
353acpi_status
354acpi_rs_list_to_byte_stream (
355 struct acpi_resource *linked_list,
356 acpi_size byte_stream_size_needed,
357 u8 *output_buffer)
358{
359 acpi_status status;
360 u8 *buffer = output_buffer;
361 acpi_size bytes_consumed = 0;
362 u8 done = FALSE;
363
364
365 ACPI_FUNCTION_TRACE ("rs_list_to_byte_stream");
366
367
368 while (!done) {
369 switch (linked_list->id) {
370 case ACPI_RSTYPE_IRQ:
371 /*
372 * IRQ Resource
373 */
374 status = acpi_rs_irq_stream (linked_list, &buffer, &bytes_consumed);
375 break;
376
377 case ACPI_RSTYPE_DMA:
378 /*
379 * DMA Resource
380 */
381 status = acpi_rs_dma_stream (linked_list, &buffer, &bytes_consumed);
382 break;
383
384 case ACPI_RSTYPE_START_DPF:
385 /*
386 * Start Dependent Functions Resource
387 */
388 status = acpi_rs_start_depend_fns_stream (linked_list,
389 &buffer, &bytes_consumed);
390 break;
391
392 case ACPI_RSTYPE_END_DPF:
393 /*
394 * End Dependent Functions Resource
395 */
396 status = acpi_rs_end_depend_fns_stream (linked_list,
397 &buffer, &bytes_consumed);
398 break;
399
400 case ACPI_RSTYPE_IO:
401 /*
402 * IO Port Resource
403 */
404 status = acpi_rs_io_stream (linked_list, &buffer, &bytes_consumed);
405 break;
406
407 case ACPI_RSTYPE_FIXED_IO:
408 /*
409 * Fixed IO Port Resource
410 */
411 status = acpi_rs_fixed_io_stream (linked_list, &buffer, &bytes_consumed);
412 break;
413
414 case ACPI_RSTYPE_VENDOR:
415 /*
416 * Vendor Defined Resource
417 */
418 status = acpi_rs_vendor_stream (linked_list, &buffer, &bytes_consumed);
419 break;
420
421 case ACPI_RSTYPE_END_TAG:
422 /*
423 * End Tag
424 */
425 status = acpi_rs_end_tag_stream (linked_list, &buffer, &bytes_consumed);
426
427 /*
428 * An End Tag indicates the end of the Resource Template
429 */
430 done = TRUE;
431 break;
432
433 case ACPI_RSTYPE_MEM24:
434 /*
435 * 24-Bit Memory Resource
436 */
437 status = acpi_rs_memory24_stream (linked_list, &buffer, &bytes_consumed);
438 break;
439
440 case ACPI_RSTYPE_MEM32:
441 /*
442 * 32-Bit Memory Range Resource
443 */
444 status = acpi_rs_memory32_range_stream (linked_list, &buffer,
445 &bytes_consumed);
446 break;
447
448 case ACPI_RSTYPE_FIXED_MEM32:
449 /*
450 * 32-Bit Fixed Memory Resource
451 */
452 status = acpi_rs_fixed_memory32_stream (linked_list, &buffer,
453 &bytes_consumed);
454 break;
455
456 case ACPI_RSTYPE_ADDRESS16:
457 /*
458 * 16-Bit Address Descriptor Resource
459 */
460 status = acpi_rs_address16_stream (linked_list, &buffer,
461 &bytes_consumed);
462 break;
463
464 case ACPI_RSTYPE_ADDRESS32:
465 /*
466 * 32-Bit Address Descriptor Resource
467 */
468 status = acpi_rs_address32_stream (linked_list, &buffer,
469 &bytes_consumed);
470 break;
471
472 case ACPI_RSTYPE_ADDRESS64:
473 /*
474 * 64-Bit Address Descriptor Resource
475 */
476 status = acpi_rs_address64_stream (linked_list, &buffer,
477 &bytes_consumed);
478 break;
479
480 case ACPI_RSTYPE_EXT_IRQ:
481 /*
482 * Extended IRQ Resource
483 */
484 status = acpi_rs_extended_irq_stream (linked_list, &buffer,
485 &bytes_consumed);
486 break;
487
488 default:
489 /*
490 * If we get here, everything is out of sync,
491 * so exit with an error
492 */
493 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Invalid descriptor type (%X) in resource list\n",
494 linked_list->id));
495 status = AE_BAD_DATA;
496 break;
497
498 } /* switch (linked_list->Id) */
499
500 if (ACPI_FAILURE (status)) {
501 return_ACPI_STATUS (status);
502 }
503
504 /*
505 * Set the Buffer to point to the open byte
506 */
507 buffer += bytes_consumed;
508
509 /*
510 * Point to the next object
511 */
512 linked_list = ACPI_PTR_ADD (struct acpi_resource,
513 linked_list, linked_list->length);
514 }
515
516 return_ACPI_STATUS (AE_OK);
517}
518