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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utcopy - Internal to external object translation 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/amlcode.h> | |
47 | ||
48 | ||
49 | #define _COMPONENT ACPI_UTILITIES | |
50 | ACPI_MODULE_NAME ("utcopy") | |
51 | ||
44f6c012 RM |
52 | /* Local prototypes */ |
53 | ||
54 | static acpi_status | |
55 | acpi_ut_copy_isimple_to_esimple ( | |
56 | union acpi_operand_object *internal_object, | |
57 | union acpi_object *external_object, | |
58 | u8 *data_space, | |
59 | acpi_size *buffer_space_used); | |
60 | ||
61 | static acpi_status | |
62 | acpi_ut_copy_ielement_to_ielement ( | |
63 | u8 object_type, | |
64 | union acpi_operand_object *source_object, | |
65 | union acpi_generic_state *state, | |
66 | void *context); | |
67 | ||
68 | static acpi_status | |
69 | acpi_ut_copy_ipackage_to_epackage ( | |
70 | union acpi_operand_object *internal_object, | |
71 | u8 *buffer, | |
72 | acpi_size *space_used); | |
73 | ||
74 | static acpi_status | |
75 | acpi_ut_copy_esimple_to_isimple( | |
76 | union acpi_object *user_obj, | |
77 | union acpi_operand_object **return_obj); | |
78 | ||
79 | static acpi_status | |
80 | acpi_ut_copy_simple_object ( | |
81 | union acpi_operand_object *source_desc, | |
82 | union acpi_operand_object *dest_desc); | |
83 | ||
84 | static acpi_status | |
85 | acpi_ut_copy_ielement_to_eelement ( | |
86 | u8 object_type, | |
87 | union acpi_operand_object *source_object, | |
88 | union acpi_generic_state *state, | |
89 | void *context); | |
90 | ||
91 | static acpi_status | |
92 | acpi_ut_copy_ipackage_to_ipackage ( | |
93 | union acpi_operand_object *source_obj, | |
94 | union acpi_operand_object *dest_obj, | |
95 | struct acpi_walk_state *walk_state); | |
96 | ||
1da177e4 LT |
97 | |
98 | /******************************************************************************* | |
99 | * | |
100 | * FUNCTION: acpi_ut_copy_isimple_to_esimple | |
101 | * | |
44f6c012 RM |
102 | * PARAMETERS: internal_object - Source object to be copied |
103 | * external_object - Where to return the copied object | |
104 | * data_space - Where object data is returned (such as | |
105 | * buffer and string data) | |
106 | * buffer_space_used - Length of data_space that was used | |
1da177e4 LT |
107 | * |
108 | * RETURN: Status | |
109 | * | |
44f6c012 RM |
110 | * DESCRIPTION: This function is called to copy a simple internal object to |
111 | * an external object. | |
1da177e4 | 112 | * |
44f6c012 RM |
113 | * The data_space buffer is assumed to have sufficient space for |
114 | * the object. | |
1da177e4 LT |
115 | * |
116 | ******************************************************************************/ | |
117 | ||
118 | static acpi_status | |
119 | acpi_ut_copy_isimple_to_esimple ( | |
120 | union acpi_operand_object *internal_object, | |
121 | union acpi_object *external_object, | |
122 | u8 *data_space, | |
123 | acpi_size *buffer_space_used) | |
124 | { | |
125 | acpi_status status = AE_OK; | |
126 | ||
127 | ||
128 | ACPI_FUNCTION_TRACE ("ut_copy_isimple_to_esimple"); | |
129 | ||
130 | ||
131 | *buffer_space_used = 0; | |
132 | ||
133 | /* | |
134 | * Check for NULL object case (could be an uninitialized | |
135 | * package element) | |
136 | */ | |
137 | if (!internal_object) { | |
138 | return_ACPI_STATUS (AE_OK); | |
139 | } | |
140 | ||
141 | /* Always clear the external object */ | |
142 | ||
143 | ACPI_MEMSET (external_object, 0, sizeof (union acpi_object)); | |
144 | ||
145 | /* | |
146 | * In general, the external object will be the same type as | |
147 | * the internal object | |
148 | */ | |
149 | external_object->type = ACPI_GET_OBJECT_TYPE (internal_object); | |
150 | ||
151 | /* However, only a limited number of external types are supported */ | |
152 | ||
153 | switch (ACPI_GET_OBJECT_TYPE (internal_object)) { | |
154 | case ACPI_TYPE_STRING: | |
155 | ||
156 | external_object->string.pointer = (char *) data_space; | |
157 | external_object->string.length = internal_object->string.length; | |
44f6c012 RM |
158 | *buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD ( |
159 | (acpi_size) internal_object->string.length + 1); | |
1da177e4 | 160 | |
44f6c012 RM |
161 | ACPI_MEMCPY ((void *) data_space, |
162 | (void *) internal_object->string.pointer, | |
163 | (acpi_size) internal_object->string.length + 1); | |
1da177e4 LT |
164 | break; |
165 | ||
166 | ||
167 | case ACPI_TYPE_BUFFER: | |
168 | ||
169 | external_object->buffer.pointer = data_space; | |
170 | external_object->buffer.length = internal_object->buffer.length; | |
44f6c012 RM |
171 | *buffer_space_used = ACPI_ROUND_UP_TO_NATIVE_WORD ( |
172 | internal_object->string.length); | |
1da177e4 | 173 | |
44f6c012 RM |
174 | ACPI_MEMCPY ((void *) data_space, |
175 | (void *) internal_object->buffer.pointer, | |
176 | internal_object->buffer.length); | |
1da177e4 LT |
177 | break; |
178 | ||
179 | ||
180 | case ACPI_TYPE_INTEGER: | |
181 | ||
182 | external_object->integer.value = internal_object->integer.value; | |
183 | break; | |
184 | ||
185 | ||
186 | case ACPI_TYPE_LOCAL_REFERENCE: | |
187 | ||
188 | /* | |
189 | * This is an object reference. Attempt to dereference it. | |
190 | */ | |
191 | switch (internal_object->reference.opcode) { | |
192 | case AML_INT_NAMEPATH_OP: | |
193 | ||
194 | /* For namepath, return the object handle ("reference") */ | |
195 | ||
196 | default: | |
197 | /* | |
198 | * Use the object type of "Any" to indicate a reference | |
199 | * to object containing a handle to an ACPI named object. | |
200 | */ | |
201 | external_object->type = ACPI_TYPE_ANY; | |
202 | external_object->reference.handle = internal_object->reference.node; | |
203 | break; | |
204 | } | |
205 | break; | |
206 | ||
207 | ||
208 | case ACPI_TYPE_PROCESSOR: | |
209 | ||
210 | external_object->processor.proc_id = internal_object->processor.proc_id; | |
211 | external_object->processor.pblk_address = internal_object->processor.address; | |
212 | external_object->processor.pblk_length = internal_object->processor.length; | |
213 | break; | |
214 | ||
215 | ||
216 | case ACPI_TYPE_POWER: | |
217 | ||
218 | external_object->power_resource.system_level = | |
219 | internal_object->power_resource.system_level; | |
220 | ||
221 | external_object->power_resource.resource_order = | |
222 | internal_object->power_resource.resource_order; | |
223 | break; | |
224 | ||
225 | ||
226 | default: | |
227 | /* | |
228 | * There is no corresponding external object type | |
229 | */ | |
230 | return_ACPI_STATUS (AE_SUPPORT); | |
231 | } | |
232 | ||
233 | return_ACPI_STATUS (status); | |
234 | } | |
235 | ||
236 | ||
237 | /******************************************************************************* | |
238 | * | |
239 | * FUNCTION: acpi_ut_copy_ielement_to_eelement | |
240 | * | |
241 | * PARAMETERS: acpi_pkg_callback | |
242 | * | |
243 | * RETURN: Status | |
244 | * | |
245 | * DESCRIPTION: Copy one package element to another package element | |
246 | * | |
247 | ******************************************************************************/ | |
248 | ||
44f6c012 | 249 | static acpi_status |
1da177e4 LT |
250 | acpi_ut_copy_ielement_to_eelement ( |
251 | u8 object_type, | |
252 | union acpi_operand_object *source_object, | |
253 | union acpi_generic_state *state, | |
254 | void *context) | |
255 | { | |
256 | acpi_status status = AE_OK; | |
257 | struct acpi_pkg_info *info = (struct acpi_pkg_info *) context; | |
258 | acpi_size object_space; | |
259 | u32 this_index; | |
260 | union acpi_object *target_object; | |
261 | ||
262 | ||
263 | ACPI_FUNCTION_ENTRY (); | |
264 | ||
265 | ||
266 | this_index = state->pkg.index; | |
267 | target_object = (union acpi_object *) | |
44f6c012 | 268 | &((union acpi_object *)(state->pkg.dest_object))->package.elements[this_index]; |
1da177e4 LT |
269 | |
270 | switch (object_type) { | |
271 | case ACPI_COPY_TYPE_SIMPLE: | |
272 | ||
273 | /* | |
274 | * This is a simple or null object | |
275 | */ | |
276 | status = acpi_ut_copy_isimple_to_esimple (source_object, | |
277 | target_object, info->free_space, &object_space); | |
278 | if (ACPI_FAILURE (status)) { | |
279 | return (status); | |
280 | } | |
281 | break; | |
282 | ||
283 | ||
284 | case ACPI_COPY_TYPE_PACKAGE: | |
285 | ||
286 | /* | |
287 | * Build the package object | |
288 | */ | |
289 | target_object->type = ACPI_TYPE_PACKAGE; | |
290 | target_object->package.count = source_object->package.count; | |
44f6c012 RM |
291 | target_object->package.elements = |
292 | ACPI_CAST_PTR (union acpi_object, info->free_space); | |
1da177e4 LT |
293 | |
294 | /* | |
295 | * Pass the new package object back to the package walk routine | |
296 | */ | |
297 | state->pkg.this_target_obj = target_object; | |
298 | ||
299 | /* | |
300 | * Save space for the array of objects (Package elements) | |
301 | * update the buffer length counter | |
302 | */ | |
303 | object_space = ACPI_ROUND_UP_TO_NATIVE_WORD ( | |
44f6c012 RM |
304 | (acpi_size) target_object->package.count * |
305 | sizeof (union acpi_object)); | |
1da177e4 LT |
306 | break; |
307 | ||
308 | ||
309 | default: | |
310 | return (AE_BAD_PARAMETER); | |
311 | } | |
312 | ||
313 | info->free_space += object_space; | |
314 | info->length += object_space; | |
315 | return (status); | |
316 | } | |
317 | ||
318 | ||
319 | /******************************************************************************* | |
320 | * | |
321 | * FUNCTION: acpi_ut_copy_ipackage_to_epackage | |
322 | * | |
44f6c012 RM |
323 | * PARAMETERS: internal_object - Pointer to the object we are returning |
324 | * Buffer - Where the object is returned | |
325 | * space_used - Where the object length is returned | |
1da177e4 LT |
326 | * |
327 | * RETURN: Status | |
328 | * | |
329 | * DESCRIPTION: This function is called to place a package object in a user | |
330 | * buffer. A package object by definition contains other objects. | |
331 | * | |
332 | * The buffer is assumed to have sufficient space for the object. | |
333 | * The caller must have verified the buffer length needed using the | |
334 | * acpi_ut_get_object_size function before calling this function. | |
335 | * | |
336 | ******************************************************************************/ | |
337 | ||
338 | static acpi_status | |
339 | acpi_ut_copy_ipackage_to_epackage ( | |
340 | union acpi_operand_object *internal_object, | |
341 | u8 *buffer, | |
342 | acpi_size *space_used) | |
343 | { | |
344 | union acpi_object *external_object; | |
345 | acpi_status status; | |
346 | struct acpi_pkg_info info; | |
347 | ||
348 | ||
349 | ACPI_FUNCTION_TRACE ("ut_copy_ipackage_to_epackage"); | |
350 | ||
351 | ||
352 | /* | |
353 | * First package at head of the buffer | |
354 | */ | |
355 | external_object = ACPI_CAST_PTR (union acpi_object, buffer); | |
356 | ||
357 | /* | |
358 | * Free space begins right after the first package | |
359 | */ | |
360 | info.length = ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object)); | |
44f6c012 RM |
361 | info.free_space = buffer + ACPI_ROUND_UP_TO_NATIVE_WORD ( |
362 | sizeof (union acpi_object)); | |
1da177e4 LT |
363 | info.object_space = 0; |
364 | info.num_packages = 1; | |
365 | ||
366 | external_object->type = ACPI_GET_OBJECT_TYPE (internal_object); | |
367 | external_object->package.count = internal_object->package.count; | |
44f6c012 RM |
368 | external_object->package.elements = ACPI_CAST_PTR (union acpi_object, |
369 | info.free_space); | |
1da177e4 LT |
370 | |
371 | /* | |
372 | * Leave room for an array of ACPI_OBJECTS in the buffer | |
373 | * and move the free space past it | |
374 | */ | |
375 | info.length += (acpi_size) external_object->package.count * | |
376 | ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object)); | |
377 | info.free_space += external_object->package.count * | |
378 | ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object)); | |
379 | ||
380 | status = acpi_ut_walk_package_tree (internal_object, external_object, | |
381 | acpi_ut_copy_ielement_to_eelement, &info); | |
382 | ||
383 | *space_used = info.length; | |
384 | return_ACPI_STATUS (status); | |
385 | } | |
386 | ||
387 | ||
388 | /******************************************************************************* | |
389 | * | |
390 | * FUNCTION: acpi_ut_copy_iobject_to_eobject | |
391 | * | |
44f6c012 RM |
392 | * PARAMETERS: internal_object - The internal object to be converted |
393 | * buffer_ptr - Where the object is returned | |
1da177e4 LT |
394 | * |
395 | * RETURN: Status | |
396 | * | |
397 | * DESCRIPTION: This function is called to build an API object to be returned to | |
398 | * the caller. | |
399 | * | |
400 | ******************************************************************************/ | |
401 | ||
402 | acpi_status | |
403 | acpi_ut_copy_iobject_to_eobject ( | |
404 | union acpi_operand_object *internal_object, | |
405 | struct acpi_buffer *ret_buffer) | |
406 | { | |
407 | acpi_status status; | |
408 | ||
409 | ||
410 | ACPI_FUNCTION_TRACE ("ut_copy_iobject_to_eobject"); | |
411 | ||
412 | ||
413 | if (ACPI_GET_OBJECT_TYPE (internal_object) == ACPI_TYPE_PACKAGE) { | |
414 | /* | |
415 | * Package object: Copy all subobjects (including | |
416 | * nested packages) | |
417 | */ | |
418 | status = acpi_ut_copy_ipackage_to_epackage (internal_object, | |
419 | ret_buffer->pointer, &ret_buffer->length); | |
420 | } | |
421 | else { | |
422 | /* | |
423 | * Build a simple object (no nested objects) | |
424 | */ | |
425 | status = acpi_ut_copy_isimple_to_esimple (internal_object, | |
44f6c012 RM |
426 | (union acpi_object *) ret_buffer->pointer, |
427 | ((u8 *) ret_buffer->pointer + | |
428 | ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object))), | |
429 | &ret_buffer->length); | |
1da177e4 LT |
430 | /* |
431 | * build simple does not include the object size in the length | |
432 | * so we add it in here | |
433 | */ | |
434 | ret_buffer->length += sizeof (union acpi_object); | |
435 | } | |
436 | ||
437 | return_ACPI_STATUS (status); | |
438 | } | |
439 | ||
440 | ||
441 | /******************************************************************************* | |
442 | * | |
443 | * FUNCTION: acpi_ut_copy_esimple_to_isimple | |
444 | * | |
44f6c012 RM |
445 | * PARAMETERS: external_object - The external object to be converted |
446 | * ret_internal_object - Where the internal object is returned | |
1da177e4 LT |
447 | * |
448 | * RETURN: Status | |
449 | * | |
450 | * DESCRIPTION: This function copies an external object to an internal one. | |
451 | * NOTE: Pointers can be copied, we don't need to copy data. | |
452 | * (The pointers have to be valid in our address space no matter | |
453 | * what we do with them!) | |
454 | * | |
455 | ******************************************************************************/ | |
456 | ||
44f6c012 | 457 | static acpi_status |
1da177e4 LT |
458 | acpi_ut_copy_esimple_to_isimple ( |
459 | union acpi_object *external_object, | |
460 | union acpi_operand_object **ret_internal_object) | |
461 | { | |
462 | union acpi_operand_object *internal_object; | |
463 | ||
464 | ||
465 | ACPI_FUNCTION_TRACE ("ut_copy_esimple_to_isimple"); | |
466 | ||
467 | ||
468 | /* | |
469 | * Simple types supported are: String, Buffer, Integer | |
470 | */ | |
471 | switch (external_object->type) { | |
472 | case ACPI_TYPE_STRING: | |
473 | case ACPI_TYPE_BUFFER: | |
474 | case ACPI_TYPE_INTEGER: | |
475 | ||
44f6c012 RM |
476 | internal_object = acpi_ut_create_internal_object ( |
477 | (u8) external_object->type); | |
1da177e4 LT |
478 | if (!internal_object) { |
479 | return_ACPI_STATUS (AE_NO_MEMORY); | |
480 | } | |
481 | break; | |
482 | ||
483 | default: | |
484 | /* All other types are not supported */ | |
485 | ||
486 | return_ACPI_STATUS (AE_SUPPORT); | |
487 | } | |
488 | ||
489 | ||
490 | /* Must COPY string and buffer contents */ | |
491 | ||
492 | switch (external_object->type) { | |
493 | case ACPI_TYPE_STRING: | |
494 | ||
495 | internal_object->string.pointer = | |
496 | ACPI_MEM_CALLOCATE ((acpi_size) external_object->string.length + 1); | |
497 | if (!internal_object->string.pointer) { | |
498 | goto error_exit; | |
499 | } | |
500 | ||
501 | ACPI_MEMCPY (internal_object->string.pointer, | |
502 | external_object->string.pointer, | |
503 | external_object->string.length); | |
504 | ||
505 | internal_object->string.length = external_object->string.length; | |
506 | break; | |
507 | ||
508 | ||
509 | case ACPI_TYPE_BUFFER: | |
510 | ||
511 | internal_object->buffer.pointer = | |
512 | ACPI_MEM_CALLOCATE (external_object->buffer.length); | |
513 | if (!internal_object->buffer.pointer) { | |
514 | goto error_exit; | |
515 | } | |
516 | ||
517 | ACPI_MEMCPY (internal_object->buffer.pointer, | |
518 | external_object->buffer.pointer, | |
519 | external_object->buffer.length); | |
520 | ||
521 | internal_object->buffer.length = external_object->buffer.length; | |
522 | break; | |
523 | ||
524 | ||
525 | case ACPI_TYPE_INTEGER: | |
526 | ||
527 | internal_object->integer.value = external_object->integer.value; | |
528 | break; | |
529 | ||
530 | default: | |
531 | /* Other types can't get here */ | |
532 | break; | |
533 | } | |
534 | ||
535 | *ret_internal_object = internal_object; | |
536 | return_ACPI_STATUS (AE_OK); | |
537 | ||
538 | ||
539 | error_exit: | |
540 | acpi_ut_remove_reference (internal_object); | |
541 | return_ACPI_STATUS (AE_NO_MEMORY); | |
542 | } | |
543 | ||
544 | ||
545 | #ifdef ACPI_FUTURE_IMPLEMENTATION | |
1da177e4 LT |
546 | /* Code to convert packages that are parameters to control methods */ |
547 | ||
548 | /******************************************************************************* | |
549 | * | |
550 | * FUNCTION: acpi_ut_copy_epackage_to_ipackage | |
551 | * | |
552 | * PARAMETERS: *internal_object - Pointer to the object we are returning | |
553 | * *Buffer - Where the object is returned | |
554 | * *space_used - Where the length of the object is returned | |
555 | * | |
556 | * RETURN: Status | |
557 | * | |
558 | * DESCRIPTION: This function is called to place a package object in a user | |
559 | * buffer. A package object by definition contains other objects. | |
560 | * | |
561 | * The buffer is assumed to have sufficient space for the object. | |
562 | * The caller must have verified the buffer length needed using the | |
563 | * acpi_ut_get_object_size function before calling this function. | |
564 | * | |
565 | ******************************************************************************/ | |
566 | ||
567 | static acpi_status | |
568 | acpi_ut_copy_epackage_to_ipackage ( | |
569 | union acpi_operand_object *internal_object, | |
570 | u8 *buffer, | |
571 | u32 *space_used) | |
572 | { | |
573 | u8 *free_space; | |
574 | union acpi_object *external_object; | |
575 | u32 length = 0; | |
576 | u32 this_index; | |
577 | u32 object_space = 0; | |
578 | union acpi_operand_object *this_internal_obj; | |
579 | union acpi_object *this_external_obj; | |
580 | ||
581 | ||
582 | ACPI_FUNCTION_TRACE ("ut_copy_epackage_to_ipackage"); | |
583 | ||
584 | ||
585 | /* | |
586 | * First package at head of the buffer | |
587 | */ | |
588 | external_object = (union acpi_object *)buffer; | |
589 | ||
590 | /* | |
591 | * Free space begins right after the first package | |
592 | */ | |
593 | free_space = buffer + sizeof(union acpi_object); | |
594 | ||
595 | ||
596 | external_object->type = ACPI_GET_OBJECT_TYPE (internal_object); | |
597 | external_object->package.count = internal_object->package.count; | |
598 | external_object->package.elements = (union acpi_object *)free_space; | |
599 | ||
600 | /* | |
601 | * Build an array of ACPI_OBJECTS in the buffer | |
602 | * and move the free space past it | |
603 | */ | |
604 | free_space += external_object->package.count * sizeof(union acpi_object); | |
605 | ||
606 | ||
607 | /* Call walk_package */ | |
608 | ||
609 | } | |
610 | ||
611 | #endif /* Future implementation */ | |
612 | ||
613 | ||
614 | /******************************************************************************* | |
615 | * | |
616 | * FUNCTION: acpi_ut_copy_eobject_to_iobject | |
617 | * | |
618 | * PARAMETERS: *internal_object - The external object to be converted | |
619 | * *buffer_ptr - Where the internal object is returned | |
620 | * | |
621 | * RETURN: Status - the status of the call | |
622 | * | |
623 | * DESCRIPTION: Converts an external object to an internal object. | |
624 | * | |
625 | ******************************************************************************/ | |
626 | ||
627 | acpi_status | |
628 | acpi_ut_copy_eobject_to_iobject ( | |
629 | union acpi_object *external_object, | |
630 | union acpi_operand_object **internal_object) | |
631 | { | |
632 | acpi_status status; | |
633 | ||
634 | ||
635 | ACPI_FUNCTION_TRACE ("ut_copy_eobject_to_iobject"); | |
636 | ||
637 | ||
638 | if (external_object->type == ACPI_TYPE_PACKAGE) { | |
639 | /* | |
640 | * Packages as external input to control methods are not supported, | |
641 | */ | |
642 | ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, | |
643 | "Packages as parameters not implemented!\n")); | |
644 | ||
645 | return_ACPI_STATUS (AE_NOT_IMPLEMENTED); | |
646 | } | |
647 | ||
648 | else { | |
649 | /* | |
650 | * Build a simple object (no nested objects) | |
651 | */ | |
652 | status = acpi_ut_copy_esimple_to_isimple (external_object, internal_object); | |
653 | } | |
654 | ||
655 | return_ACPI_STATUS (status); | |
656 | } | |
657 | ||
658 | ||
659 | /******************************************************************************* | |
660 | * | |
661 | * FUNCTION: acpi_ut_copy_simple_object | |
662 | * | |
663 | * PARAMETERS: source_desc - The internal object to be copied | |
664 | * dest_desc - New target object | |
665 | * | |
666 | * RETURN: Status | |
667 | * | |
668 | * DESCRIPTION: Simple copy of one internal object to another. Reference count | |
669 | * of the destination object is preserved. | |
670 | * | |
671 | ******************************************************************************/ | |
672 | ||
44f6c012 | 673 | static acpi_status |
1da177e4 LT |
674 | acpi_ut_copy_simple_object ( |
675 | union acpi_operand_object *source_desc, | |
676 | union acpi_operand_object *dest_desc) | |
677 | { | |
678 | u16 reference_count; | |
679 | union acpi_operand_object *next_object; | |
680 | ||
681 | ||
682 | /* Save fields from destination that we don't want to overwrite */ | |
683 | ||
684 | reference_count = dest_desc->common.reference_count; | |
685 | next_object = dest_desc->common.next_object; | |
686 | ||
687 | /* Copy the entire source object over the destination object*/ | |
688 | ||
689 | ACPI_MEMCPY ((char *) dest_desc, (char *) source_desc, | |
690 | sizeof (union acpi_operand_object)); | |
691 | ||
692 | /* Restore the saved fields */ | |
693 | ||
694 | dest_desc->common.reference_count = reference_count; | |
695 | dest_desc->common.next_object = next_object; | |
696 | ||
697 | /* Handle the objects with extra data */ | |
698 | ||
699 | switch (ACPI_GET_OBJECT_TYPE (dest_desc)) { | |
700 | case ACPI_TYPE_BUFFER: | |
701 | ||
702 | dest_desc->buffer.node = NULL; | |
703 | dest_desc->common.flags = source_desc->common.flags; | |
704 | ||
705 | /* | |
706 | * Allocate and copy the actual buffer if and only if: | |
707 | * 1) There is a valid buffer pointer | |
708 | * 2) The buffer is not static (not in an ACPI table) (in this case, | |
709 | * the actual pointer was already copied above) | |
710 | */ | |
711 | if ((source_desc->buffer.pointer) && | |
712 | (!(source_desc->common.flags & AOPOBJ_STATIC_POINTER))) { | |
713 | dest_desc->buffer.pointer = NULL; | |
714 | ||
715 | /* Create an actual buffer only if length > 0 */ | |
716 | ||
717 | if (source_desc->buffer.length) { | |
718 | dest_desc->buffer.pointer = | |
719 | ACPI_MEM_ALLOCATE (source_desc->buffer.length); | |
720 | if (!dest_desc->buffer.pointer) { | |
721 | return (AE_NO_MEMORY); | |
722 | } | |
723 | ||
724 | /* Copy the actual buffer data */ | |
725 | ||
726 | ACPI_MEMCPY (dest_desc->buffer.pointer, | |
727 | source_desc->buffer.pointer, | |
728 | source_desc->buffer.length); | |
729 | } | |
730 | } | |
731 | break; | |
732 | ||
733 | case ACPI_TYPE_STRING: | |
734 | ||
735 | /* | |
736 | * Allocate and copy the actual string if and only if: | |
737 | * 1) There is a valid string pointer | |
738 | * 2) The string is not static (not in an ACPI table) (in this case, | |
739 | * the actual pointer was already copied above) | |
740 | */ | |
741 | if ((source_desc->string.pointer) && | |
742 | (!(source_desc->common.flags & AOPOBJ_STATIC_POINTER))) { | |
743 | dest_desc->string.pointer = | |
744 | ACPI_MEM_ALLOCATE ((acpi_size) source_desc->string.length + 1); | |
745 | if (!dest_desc->string.pointer) { | |
746 | return (AE_NO_MEMORY); | |
747 | } | |
748 | ||
749 | ACPI_MEMCPY (dest_desc->string.pointer, source_desc->string.pointer, | |
750 | (acpi_size) source_desc->string.length + 1); | |
751 | } | |
752 | break; | |
753 | ||
754 | case ACPI_TYPE_LOCAL_REFERENCE: | |
755 | /* | |
756 | * We copied the reference object, so we now must add a reference | |
757 | * to the object pointed to by the reference | |
758 | */ | |
759 | acpi_ut_add_reference (source_desc->reference.object); | |
760 | break; | |
761 | ||
762 | default: | |
763 | /* Nothing to do for other simple objects */ | |
764 | break; | |
765 | } | |
766 | ||
767 | return (AE_OK); | |
768 | } | |
769 | ||
770 | ||
771 | /******************************************************************************* | |
772 | * | |
773 | * FUNCTION: acpi_ut_copy_ielement_to_ielement | |
774 | * | |
775 | * PARAMETERS: acpi_pkg_callback | |
776 | * | |
777 | * RETURN: Status | |
778 | * | |
779 | * DESCRIPTION: Copy one package element to another package element | |
780 | * | |
781 | ******************************************************************************/ | |
782 | ||
44f6c012 | 783 | static acpi_status |
1da177e4 LT |
784 | acpi_ut_copy_ielement_to_ielement ( |
785 | u8 object_type, | |
786 | union acpi_operand_object *source_object, | |
787 | union acpi_generic_state *state, | |
788 | void *context) | |
789 | { | |
790 | acpi_status status = AE_OK; | |
791 | u32 this_index; | |
792 | union acpi_operand_object **this_target_ptr; | |
793 | union acpi_operand_object *target_object; | |
794 | ||
795 | ||
796 | ACPI_FUNCTION_ENTRY (); | |
797 | ||
798 | ||
799 | this_index = state->pkg.index; | |
800 | this_target_ptr = (union acpi_operand_object **) | |
801 | &state->pkg.dest_object->package.elements[this_index]; | |
802 | ||
803 | switch (object_type) { | |
804 | case ACPI_COPY_TYPE_SIMPLE: | |
805 | ||
806 | /* A null source object indicates a (legal) null package element */ | |
807 | ||
808 | if (source_object) { | |
809 | /* | |
810 | * This is a simple object, just copy it | |
811 | */ | |
812 | target_object = acpi_ut_create_internal_object ( | |
813 | ACPI_GET_OBJECT_TYPE (source_object)); | |
814 | if (!target_object) { | |
815 | return (AE_NO_MEMORY); | |
816 | } | |
817 | ||
818 | status = acpi_ut_copy_simple_object (source_object, target_object); | |
819 | if (ACPI_FAILURE (status)) { | |
820 | goto error_exit; | |
821 | } | |
822 | ||
823 | *this_target_ptr = target_object; | |
824 | } | |
825 | else { | |
826 | /* Pass through a null element */ | |
827 | ||
828 | *this_target_ptr = NULL; | |
829 | } | |
830 | break; | |
831 | ||
832 | ||
833 | case ACPI_COPY_TYPE_PACKAGE: | |
834 | ||
835 | /* | |
836 | * This object is a package - go down another nesting level | |
837 | * Create and build the package object | |
838 | */ | |
839 | target_object = acpi_ut_create_internal_object (ACPI_TYPE_PACKAGE); | |
840 | if (!target_object) { | |
841 | return (AE_NO_MEMORY); | |
842 | } | |
843 | ||
844 | target_object->package.count = source_object->package.count; | |
845 | target_object->common.flags = source_object->common.flags; | |
846 | ||
847 | /* | |
848 | * Create the object array | |
849 | */ | |
850 | target_object->package.elements = | |
851 | ACPI_MEM_CALLOCATE (((acpi_size) source_object->package.count + 1) * | |
852 | sizeof (void *)); | |
853 | if (!target_object->package.elements) { | |
854 | status = AE_NO_MEMORY; | |
855 | goto error_exit; | |
856 | } | |
857 | ||
858 | /* | |
859 | * Pass the new package object back to the package walk routine | |
860 | */ | |
861 | state->pkg.this_target_obj = target_object; | |
862 | ||
863 | /* | |
864 | * Store the object pointer in the parent package object | |
865 | */ | |
866 | *this_target_ptr = target_object; | |
867 | break; | |
868 | ||
869 | ||
870 | default: | |
871 | return (AE_BAD_PARAMETER); | |
872 | } | |
873 | ||
874 | return (status); | |
875 | ||
876 | error_exit: | |
877 | acpi_ut_remove_reference (target_object); | |
878 | return (status); | |
879 | } | |
880 | ||
881 | ||
882 | /******************************************************************************* | |
883 | * | |
884 | * FUNCTION: acpi_ut_copy_ipackage_to_ipackage | |
885 | * | |
886 | * PARAMETERS: *source_obj - Pointer to the source package object | |
887 | * *dest_obj - Where the internal object is returned | |
888 | * | |
889 | * RETURN: Status - the status of the call | |
890 | * | |
891 | * DESCRIPTION: This function is called to copy an internal package object | |
892 | * into another internal package object. | |
893 | * | |
894 | ******************************************************************************/ | |
895 | ||
44f6c012 | 896 | static acpi_status |
1da177e4 LT |
897 | acpi_ut_copy_ipackage_to_ipackage ( |
898 | union acpi_operand_object *source_obj, | |
899 | union acpi_operand_object *dest_obj, | |
900 | struct acpi_walk_state *walk_state) | |
901 | { | |
902 | acpi_status status = AE_OK; | |
903 | ||
904 | ||
905 | ACPI_FUNCTION_TRACE ("ut_copy_ipackage_to_ipackage"); | |
906 | ||
907 | ||
908 | dest_obj->common.type = ACPI_GET_OBJECT_TYPE (source_obj); | |
909 | dest_obj->common.flags = source_obj->common.flags; | |
910 | dest_obj->package.count = source_obj->package.count; | |
911 | ||
912 | /* | |
913 | * Create the object array and walk the source package tree | |
914 | */ | |
915 | dest_obj->package.elements = ACPI_MEM_CALLOCATE ( | |
916 | ((acpi_size) source_obj->package.count + 1) * | |
917 | sizeof (void *)); | |
918 | if (!dest_obj->package.elements) { | |
919 | ACPI_REPORT_ERROR ( | |
920 | ("aml_build_copy_internal_package_object: Package allocation failure\n")); | |
921 | return_ACPI_STATUS (AE_NO_MEMORY); | |
922 | } | |
923 | ||
924 | /* | |
925 | * Copy the package element-by-element by walking the package "tree". | |
926 | * This handles nested packages of arbitrary depth. | |
927 | */ | |
928 | status = acpi_ut_walk_package_tree (source_obj, dest_obj, | |
929 | acpi_ut_copy_ielement_to_ielement, walk_state); | |
930 | if (ACPI_FAILURE (status)) { | |
931 | /* On failure, delete the destination package object */ | |
932 | ||
933 | acpi_ut_remove_reference (dest_obj); | |
934 | } | |
935 | ||
936 | return_ACPI_STATUS (status); | |
937 | } | |
938 | ||
939 | ||
940 | /******************************************************************************* | |
941 | * | |
942 | * FUNCTION: acpi_ut_copy_iobject_to_iobject | |
943 | * | |
944 | * PARAMETERS: walk_state - Current walk state | |
945 | * source_desc - The internal object to be copied | |
946 | * dest_desc - Where the copied object is returned | |
947 | * | |
948 | * RETURN: Status | |
949 | * | |
950 | * DESCRIPTION: Copy an internal object to a new internal object | |
951 | * | |
952 | ******************************************************************************/ | |
953 | ||
954 | acpi_status | |
955 | acpi_ut_copy_iobject_to_iobject ( | |
956 | union acpi_operand_object *source_desc, | |
957 | union acpi_operand_object **dest_desc, | |
958 | struct acpi_walk_state *walk_state) | |
959 | { | |
960 | acpi_status status = AE_OK; | |
961 | ||
962 | ||
963 | ACPI_FUNCTION_TRACE ("ut_copy_iobject_to_iobject"); | |
964 | ||
965 | ||
966 | /* Create the top level object */ | |
967 | ||
968 | *dest_desc = acpi_ut_create_internal_object (ACPI_GET_OBJECT_TYPE (source_desc)); | |
969 | if (!*dest_desc) { | |
970 | return_ACPI_STATUS (AE_NO_MEMORY); | |
971 | } | |
972 | ||
973 | /* Copy the object and possible subobjects */ | |
974 | ||
975 | if (ACPI_GET_OBJECT_TYPE (source_desc) == ACPI_TYPE_PACKAGE) { | |
976 | status = acpi_ut_copy_ipackage_to_ipackage (source_desc, *dest_desc, | |
977 | walk_state); | |
978 | } | |
979 | else { | |
980 | status = acpi_ut_copy_simple_object (source_desc, *dest_desc); | |
981 | } | |
982 | ||
983 | return_ACPI_STATUS (status); | |
984 | } | |
985 | ||
986 |