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Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: utobject - ACPI object create/delete/size/cache routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
75a44ce0 | 8 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acnamesp.h" | |
1da177e4 | 47 | |
1da177e4 | 48 | #define _COMPONENT ACPI_UTILITIES |
4be44fcd | 49 | ACPI_MODULE_NAME("utobject") |
1da177e4 | 50 | |
44f6c012 | 51 | /* Local prototypes */ |
44f6c012 | 52 | static acpi_status |
4be44fcd LB |
53 | acpi_ut_get_simple_object_size(union acpi_operand_object *obj, |
54 | acpi_size * obj_length); | |
44f6c012 RM |
55 | |
56 | static acpi_status | |
4be44fcd LB |
57 | acpi_ut_get_package_object_size(union acpi_operand_object *obj, |
58 | acpi_size * obj_length); | |
44f6c012 RM |
59 | |
60 | static acpi_status | |
4be44fcd LB |
61 | acpi_ut_get_element_length(u8 object_type, |
62 | union acpi_operand_object *source_object, | |
63 | union acpi_generic_state *state, void *context); | |
1da177e4 LT |
64 | |
65 | /******************************************************************************* | |
66 | * | |
67 | * FUNCTION: acpi_ut_create_internal_object_dbg | |
68 | * | |
69 | * PARAMETERS: module_name - Source file name of caller | |
70 | * line_number - Line number of caller | |
71 | * component_id - Component type of caller | |
72 | * Type - ACPI Type of the new object | |
73 | * | |
44f6c012 | 74 | * RETURN: A new internal object, null on failure |
1da177e4 LT |
75 | * |
76 | * DESCRIPTION: Create and initialize a new internal object. | |
77 | * | |
78 | * NOTE: We always allocate the worst-case object descriptor because | |
79 | * these objects are cached, and we want them to be | |
80 | * one-size-satisifies-any-request. This in itself may not be | |
81 | * the most memory efficient, but the efficiency of the object | |
82 | * cache should more than make up for this! | |
83 | * | |
84 | ******************************************************************************/ | |
85 | ||
4b8ed631 BM |
86 | union acpi_operand_object *acpi_ut_create_internal_object_dbg(const char |
87 | *module_name, | |
4be44fcd LB |
88 | u32 line_number, |
89 | u32 component_id, | |
90 | acpi_object_type | |
91 | type) | |
1da177e4 | 92 | { |
4be44fcd LB |
93 | union acpi_operand_object *object; |
94 | union acpi_operand_object *second_object; | |
1da177e4 | 95 | |
b229cf92 | 96 | ACPI_FUNCTION_TRACE_STR(ut_create_internal_object_dbg, |
4be44fcd | 97 | acpi_ut_get_type_name(type)); |
1da177e4 LT |
98 | |
99 | /* Allocate the raw object descriptor */ | |
100 | ||
4be44fcd LB |
101 | object = |
102 | acpi_ut_allocate_object_desc_dbg(module_name, line_number, | |
103 | component_id); | |
1da177e4 | 104 | if (!object) { |
4be44fcd | 105 | return_PTR(NULL); |
1da177e4 LT |
106 | } |
107 | ||
108 | switch (type) { | |
109 | case ACPI_TYPE_REGION: | |
110 | case ACPI_TYPE_BUFFER_FIELD: | |
ef805d95 | 111 | case ACPI_TYPE_LOCAL_BANK_FIELD: |
1da177e4 LT |
112 | |
113 | /* These types require a secondary object */ | |
114 | ||
4be44fcd LB |
115 | second_object = acpi_ut_allocate_object_desc_dbg(module_name, |
116 | line_number, | |
117 | component_id); | |
1da177e4 | 118 | if (!second_object) { |
4be44fcd LB |
119 | acpi_ut_delete_object_desc(object); |
120 | return_PTR(NULL); | |
1da177e4 LT |
121 | } |
122 | ||
123 | second_object->common.type = ACPI_TYPE_LOCAL_EXTRA; | |
124 | second_object->common.reference_count = 1; | |
125 | ||
126 | /* Link the second object to the first */ | |
127 | ||
128 | object->common.next_object = second_object; | |
129 | break; | |
130 | ||
131 | default: | |
132 | /* All others have no secondary object */ | |
133 | break; | |
134 | } | |
135 | ||
136 | /* Save the object type in the object descriptor */ | |
137 | ||
138 | object->common.type = (u8) type; | |
139 | ||
140 | /* Init the reference count */ | |
141 | ||
142 | object->common.reference_count = 1; | |
143 | ||
144 | /* Any per-type initialization should go here */ | |
145 | ||
4be44fcd | 146 | return_PTR(object); |
1da177e4 LT |
147 | } |
148 | ||
6287ee32 BM |
149 | /******************************************************************************* |
150 | * | |
151 | * FUNCTION: acpi_ut_create_package_object | |
152 | * | |
153 | * PARAMETERS: Count - Number of package elements | |
154 | * | |
155 | * RETURN: Pointer to a new Package object, null on failure | |
156 | * | |
157 | * DESCRIPTION: Create a fully initialized package object | |
158 | * | |
159 | ******************************************************************************/ | |
160 | ||
161 | union acpi_operand_object *acpi_ut_create_package_object(u32 count) | |
162 | { | |
163 | union acpi_operand_object *package_desc; | |
164 | union acpi_operand_object **package_elements; | |
165 | ||
166 | ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count); | |
167 | ||
168 | /* Create a new Package object */ | |
169 | ||
170 | package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE); | |
171 | if (!package_desc) { | |
172 | return_PTR(NULL); | |
173 | } | |
174 | ||
175 | /* | |
176 | * Create the element array. Count+1 allows the array to be null | |
177 | * terminated. | |
178 | */ | |
67a119f9 BM |
179 | package_elements = ACPI_ALLOCATE_ZEROED(((acpi_size) count + |
180 | 1) * sizeof(void *)); | |
6287ee32 | 181 | if (!package_elements) { |
83dd4504 | 182 | acpi_ut_remove_reference(package_desc); |
6287ee32 BM |
183 | return_PTR(NULL); |
184 | } | |
185 | ||
186 | package_desc->package.count = count; | |
187 | package_desc->package.elements = package_elements; | |
188 | return_PTR(package_desc); | |
189 | } | |
190 | ||
1da177e4 LT |
191 | /******************************************************************************* |
192 | * | |
193 | * FUNCTION: acpi_ut_create_buffer_object | |
194 | * | |
195 | * PARAMETERS: buffer_size - Size of buffer to be created | |
196 | * | |
44f6c012 | 197 | * RETURN: Pointer to a new Buffer object, null on failure |
1da177e4 LT |
198 | * |
199 | * DESCRIPTION: Create a fully initialized buffer object | |
200 | * | |
201 | ******************************************************************************/ | |
202 | ||
4be44fcd | 203 | union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size) |
1da177e4 | 204 | { |
4be44fcd LB |
205 | union acpi_operand_object *buffer_desc; |
206 | u8 *buffer = NULL; | |
1da177e4 | 207 | |
b229cf92 | 208 | ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size); |
1da177e4 LT |
209 | |
210 | /* Create a new Buffer object */ | |
211 | ||
4be44fcd | 212 | buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
1da177e4 | 213 | if (!buffer_desc) { |
4be44fcd | 214 | return_PTR(NULL); |
1da177e4 LT |
215 | } |
216 | ||
217 | /* Create an actual buffer only if size > 0 */ | |
218 | ||
219 | if (buffer_size > 0) { | |
52fc0b02 | 220 | |
1da177e4 LT |
221 | /* Allocate the actual buffer */ |
222 | ||
8313524a | 223 | buffer = ACPI_ALLOCATE_ZEROED(buffer_size); |
1da177e4 | 224 | if (!buffer) { |
b8e4d893 BM |
225 | ACPI_ERROR((AE_INFO, "Could not allocate size %X", |
226 | (u32) buffer_size)); | |
4be44fcd LB |
227 | acpi_ut_remove_reference(buffer_desc); |
228 | return_PTR(NULL); | |
1da177e4 LT |
229 | } |
230 | } | |
231 | ||
232 | /* Complete buffer object initialization */ | |
233 | ||
234 | buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID; | |
235 | buffer_desc->buffer.pointer = buffer; | |
236 | buffer_desc->buffer.length = (u32) buffer_size; | |
237 | ||
238 | /* Return the new buffer descriptor */ | |
239 | ||
4be44fcd | 240 | return_PTR(buffer_desc); |
1da177e4 LT |
241 | } |
242 | ||
1da177e4 LT |
243 | /******************************************************************************* |
244 | * | |
245 | * FUNCTION: acpi_ut_create_string_object | |
246 | * | |
44f6c012 RM |
247 | * PARAMETERS: string_size - Size of string to be created. Does not |
248 | * include NULL terminator, this is added | |
249 | * automatically. | |
1da177e4 LT |
250 | * |
251 | * RETURN: Pointer to a new String object | |
252 | * | |
253 | * DESCRIPTION: Create a fully initialized string object | |
254 | * | |
255 | ******************************************************************************/ | |
256 | ||
4be44fcd | 257 | union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size) |
1da177e4 | 258 | { |
4be44fcd LB |
259 | union acpi_operand_object *string_desc; |
260 | char *string; | |
1da177e4 | 261 | |
b229cf92 | 262 | ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size); |
1da177e4 LT |
263 | |
264 | /* Create a new String object */ | |
265 | ||
4be44fcd | 266 | string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING); |
1da177e4 | 267 | if (!string_desc) { |
4be44fcd | 268 | return_PTR(NULL); |
1da177e4 LT |
269 | } |
270 | ||
271 | /* | |
272 | * Allocate the actual string buffer -- (Size + 1) for NULL terminator. | |
273 | * NOTE: Zero-length strings are NULL terminated | |
274 | */ | |
8313524a | 275 | string = ACPI_ALLOCATE_ZEROED(string_size + 1); |
1da177e4 | 276 | if (!string) { |
b8e4d893 BM |
277 | ACPI_ERROR((AE_INFO, "Could not allocate size %X", |
278 | (u32) string_size)); | |
4be44fcd LB |
279 | acpi_ut_remove_reference(string_desc); |
280 | return_PTR(NULL); | |
1da177e4 LT |
281 | } |
282 | ||
283 | /* Complete string object initialization */ | |
284 | ||
285 | string_desc->string.pointer = string; | |
286 | string_desc->string.length = (u32) string_size; | |
287 | ||
288 | /* Return the new string descriptor */ | |
289 | ||
4be44fcd | 290 | return_PTR(string_desc); |
1da177e4 LT |
291 | } |
292 | ||
1da177e4 LT |
293 | /******************************************************************************* |
294 | * | |
295 | * FUNCTION: acpi_ut_valid_internal_object | |
296 | * | |
297 | * PARAMETERS: Object - Object to be validated | |
298 | * | |
44f6c012 RM |
299 | * RETURN: TRUE if object is valid, FALSE otherwise |
300 | * | |
0211a9c8 | 301 | * DESCRIPTION: Validate a pointer to be a union acpi_operand_object |
1da177e4 LT |
302 | * |
303 | ******************************************************************************/ | |
304 | ||
4be44fcd | 305 | u8 acpi_ut_valid_internal_object(void *object) |
1da177e4 LT |
306 | { |
307 | ||
b229cf92 | 308 | ACPI_FUNCTION_NAME(ut_valid_internal_object); |
1da177e4 LT |
309 | |
310 | /* Check for a null pointer */ | |
311 | ||
312 | if (!object) { | |
7bcc06e8 | 313 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "**** Null Object Ptr\n")); |
1da177e4 LT |
314 | return (FALSE); |
315 | } | |
316 | ||
317 | /* Check the descriptor type field */ | |
318 | ||
4be44fcd | 319 | switch (ACPI_GET_DESCRIPTOR_TYPE(object)) { |
1da177e4 LT |
320 | case ACPI_DESC_TYPE_OPERAND: |
321 | ||
322 | /* The object appears to be a valid union acpi_operand_object */ | |
323 | ||
324 | return (TRUE); | |
325 | ||
326 | default: | |
7bcc06e8 | 327 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
4be44fcd LB |
328 | "%p is not not an ACPI operand obj [%s]\n", |
329 | object, acpi_ut_get_descriptor_name(object))); | |
1da177e4 LT |
330 | break; |
331 | } | |
332 | ||
333 | return (FALSE); | |
334 | } | |
335 | ||
1da177e4 LT |
336 | /******************************************************************************* |
337 | * | |
338 | * FUNCTION: acpi_ut_allocate_object_desc_dbg | |
339 | * | |
340 | * PARAMETERS: module_name - Caller's module name (for error output) | |
341 | * line_number - Caller's line number (for error output) | |
342 | * component_id - Caller's component ID (for error output) | |
343 | * | |
344 | * RETURN: Pointer to newly allocated object descriptor. Null on error | |
345 | * | |
346 | * DESCRIPTION: Allocate a new object descriptor. Gracefully handle | |
347 | * error conditions. | |
348 | * | |
349 | ******************************************************************************/ | |
350 | ||
4b8ed631 | 351 | void *acpi_ut_allocate_object_desc_dbg(const char *module_name, |
4be44fcd | 352 | u32 line_number, u32 component_id) |
1da177e4 | 353 | { |
4be44fcd | 354 | union acpi_operand_object *object; |
1da177e4 | 355 | |
b229cf92 | 356 | ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg); |
1da177e4 | 357 | |
4be44fcd | 358 | object = acpi_os_acquire_object(acpi_gbl_operand_cache); |
1da177e4 | 359 | if (!object) { |
b8e4d893 BM |
360 | ACPI_ERROR((module_name, line_number, |
361 | "Could not allocate an object descriptor")); | |
1da177e4 | 362 | |
4be44fcd | 363 | return_PTR(NULL); |
1da177e4 LT |
364 | } |
365 | ||
366 | /* Mark the descriptor type */ | |
8313524a | 367 | |
73459f73 | 368 | memset(object, 0, sizeof(union acpi_operand_object)); |
4be44fcd | 369 | ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND); |
1da177e4 | 370 | |
4be44fcd LB |
371 | ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n", |
372 | object, (u32) sizeof(union acpi_operand_object))); | |
1da177e4 | 373 | |
4be44fcd | 374 | return_PTR(object); |
1da177e4 LT |
375 | } |
376 | ||
1da177e4 LT |
377 | /******************************************************************************* |
378 | * | |
379 | * FUNCTION: acpi_ut_delete_object_desc | |
380 | * | |
381 | * PARAMETERS: Object - An Acpi internal object to be deleted | |
382 | * | |
383 | * RETURN: None. | |
384 | * | |
385 | * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache | |
386 | * | |
387 | ******************************************************************************/ | |
388 | ||
4be44fcd | 389 | void acpi_ut_delete_object_desc(union acpi_operand_object *object) |
1da177e4 | 390 | { |
b229cf92 | 391 | ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object); |
1da177e4 | 392 | |
0211a9c8 | 393 | /* Object must be a union acpi_operand_object */ |
1da177e4 | 394 | |
4be44fcd | 395 | if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) { |
b8e4d893 BM |
396 | ACPI_ERROR((AE_INFO, |
397 | "%p is not an ACPI Operand object [%s]", object, | |
398 | acpi_ut_get_descriptor_name(object))); | |
1da177e4 LT |
399 | return_VOID; |
400 | } | |
401 | ||
4be44fcd | 402 | (void)acpi_os_release_object(acpi_gbl_operand_cache, object); |
1da177e4 LT |
403 | return_VOID; |
404 | } | |
1da177e4 | 405 | |
1da177e4 LT |
406 | /******************************************************************************* |
407 | * | |
408 | * FUNCTION: acpi_ut_get_simple_object_size | |
409 | * | |
44f6c012 RM |
410 | * PARAMETERS: internal_object - An ACPI operand object |
411 | * obj_length - Where the length is returned | |
1da177e4 LT |
412 | * |
413 | * RETURN: Status | |
414 | * | |
415 | * DESCRIPTION: This function is called to determine the space required to | |
416 | * contain a simple object for return to an external user. | |
417 | * | |
418 | * The length includes the object structure plus any additional | |
419 | * needed space. | |
420 | * | |
421 | ******************************************************************************/ | |
422 | ||
44f6c012 | 423 | static acpi_status |
4be44fcd LB |
424 | acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object, |
425 | acpi_size * obj_length) | |
1da177e4 | 426 | { |
4be44fcd | 427 | acpi_size length; |
3c7db22a | 428 | acpi_size size; |
4be44fcd | 429 | acpi_status status = AE_OK; |
1da177e4 | 430 | |
b229cf92 | 431 | ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object); |
1da177e4 | 432 | |
44f6c012 RM |
433 | /* |
434 | * Handle a null object (Could be a uninitialized package | |
435 | * element -- which is legal) | |
436 | */ | |
1da177e4 | 437 | if (!internal_object) { |
c8d16e27 | 438 | *obj_length = sizeof(union acpi_object); |
4be44fcd | 439 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
440 | } |
441 | ||
442 | /* Start with the length of the Acpi object */ | |
443 | ||
4be44fcd | 444 | length = sizeof(union acpi_object); |
1da177e4 | 445 | |
4be44fcd | 446 | if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) { |
52fc0b02 | 447 | |
1da177e4 LT |
448 | /* Object is a named object (reference), just return the length */ |
449 | ||
4be44fcd LB |
450 | *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length); |
451 | return_ACPI_STATUS(status); | |
1da177e4 LT |
452 | } |
453 | ||
454 | /* | |
455 | * The final length depends on the object type | |
456 | * Strings and Buffers are packed right up against the parent object and | |
457 | * must be accessed bytewise or there may be alignment problems on | |
458 | * certain processors | |
459 | */ | |
3371c19c | 460 | switch (internal_object->common.type) { |
1da177e4 LT |
461 | case ACPI_TYPE_STRING: |
462 | ||
463 | length += (acpi_size) internal_object->string.length + 1; | |
464 | break; | |
465 | ||
1da177e4 LT |
466 | case ACPI_TYPE_BUFFER: |
467 | ||
468 | length += (acpi_size) internal_object->buffer.length; | |
469 | break; | |
470 | ||
1da177e4 LT |
471 | case ACPI_TYPE_INTEGER: |
472 | case ACPI_TYPE_PROCESSOR: | |
473 | case ACPI_TYPE_POWER: | |
474 | ||
7a5bb996 LM |
475 | /* No extra data for these types */ |
476 | ||
1da177e4 LT |
477 | break; |
478 | ||
1da177e4 LT |
479 | case ACPI_TYPE_LOCAL_REFERENCE: |
480 | ||
1044f1f6 BM |
481 | switch (internal_object->reference.class) { |
482 | case ACPI_REFCLASS_NAME: | |
1da177e4 LT |
483 | |
484 | /* | |
485 | * Get the actual length of the full pathname to this object. | |
486 | * The reference will be converted to the pathname to the object | |
487 | */ | |
3c7db22a BM |
488 | size = |
489 | acpi_ns_get_pathname_length(internal_object-> | |
490 | reference.node); | |
491 | if (!size) { | |
492 | return_ACPI_STATUS(AE_BAD_PARAMETER); | |
493 | } | |
494 | ||
495 | length += ACPI_ROUND_UP_TO_NATIVE_WORD(size); | |
1da177e4 LT |
496 | break; |
497 | ||
498 | default: | |
499 | ||
500 | /* | |
501 | * No other reference opcodes are supported. | |
502 | * Notably, Locals and Args are not supported, but this may be | |
503 | * required eventually. | |
504 | */ | |
b8e4d893 | 505 | ACPI_ERROR((AE_INFO, |
c2de3a49 | 506 | "Cannot convert to external object - " |
1044f1f6 | 507 | "unsupported Reference Class [%s] %X in object %p", |
c2de3a49 | 508 | acpi_ut_get_reference_name(internal_object), |
1044f1f6 | 509 | internal_object->reference.class, |
b8e4d893 | 510 | internal_object)); |
1da177e4 LT |
511 | status = AE_TYPE; |
512 | break; | |
513 | } | |
514 | break; | |
515 | ||
1da177e4 LT |
516 | default: |
517 | ||
c2de3a49 BM |
518 | ACPI_ERROR((AE_INFO, "Cannot convert to external object - " |
519 | "unsupported type [%s] %X in object %p", | |
520 | acpi_ut_get_object_type_name(internal_object), | |
3371c19c | 521 | internal_object->common.type, internal_object)); |
1da177e4 LT |
522 | status = AE_TYPE; |
523 | break; | |
524 | } | |
525 | ||
526 | /* | |
527 | * Account for the space required by the object rounded up to the next | |
528 | * multiple of the machine word size. This keeps each object aligned | |
529 | * on a machine word boundary. (preventing alignment faults on some | |
530 | * machines.) | |
531 | */ | |
4be44fcd LB |
532 | *obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length); |
533 | return_ACPI_STATUS(status); | |
1da177e4 LT |
534 | } |
535 | ||
1da177e4 LT |
536 | /******************************************************************************* |
537 | * | |
538 | * FUNCTION: acpi_ut_get_element_length | |
539 | * | |
540 | * PARAMETERS: acpi_pkg_callback | |
541 | * | |
542 | * RETURN: Status | |
543 | * | |
544 | * DESCRIPTION: Get the length of one package element. | |
545 | * | |
546 | ******************************************************************************/ | |
547 | ||
44f6c012 | 548 | static acpi_status |
4be44fcd LB |
549 | acpi_ut_get_element_length(u8 object_type, |
550 | union acpi_operand_object *source_object, | |
551 | union acpi_generic_state *state, void *context) | |
1da177e4 | 552 | { |
4be44fcd LB |
553 | acpi_status status = AE_OK; |
554 | struct acpi_pkg_info *info = (struct acpi_pkg_info *)context; | |
555 | acpi_size object_space; | |
1da177e4 LT |
556 | |
557 | switch (object_type) { | |
558 | case ACPI_COPY_TYPE_SIMPLE: | |
559 | ||
560 | /* | |
561 | * Simple object - just get the size (Null object/entry is handled | |
562 | * here also) and sum it into the running package length | |
563 | */ | |
4be44fcd LB |
564 | status = |
565 | acpi_ut_get_simple_object_size(source_object, | |
566 | &object_space); | |
567 | if (ACPI_FAILURE(status)) { | |
1da177e4 LT |
568 | return (status); |
569 | } | |
570 | ||
571 | info->length += object_space; | |
572 | break; | |
573 | ||
1da177e4 LT |
574 | case ACPI_COPY_TYPE_PACKAGE: |
575 | ||
576 | /* Package object - nothing much to do here, let the walk handle it */ | |
577 | ||
578 | info->num_packages++; | |
579 | state->pkg.this_target_obj = NULL; | |
580 | break; | |
581 | ||
1da177e4 LT |
582 | default: |
583 | ||
584 | /* No other types allowed */ | |
585 | ||
586 | return (AE_BAD_PARAMETER); | |
587 | } | |
588 | ||
589 | return (status); | |
590 | } | |
591 | ||
1da177e4 LT |
592 | /******************************************************************************* |
593 | * | |
594 | * FUNCTION: acpi_ut_get_package_object_size | |
595 | * | |
44f6c012 RM |
596 | * PARAMETERS: internal_object - An ACPI internal object |
597 | * obj_length - Where the length is returned | |
1da177e4 LT |
598 | * |
599 | * RETURN: Status | |
600 | * | |
601 | * DESCRIPTION: This function is called to determine the space required to | |
602 | * contain a package object for return to an external user. | |
603 | * | |
604 | * This is moderately complex since a package contains other | |
605 | * objects including packages. | |
606 | * | |
607 | ******************************************************************************/ | |
608 | ||
44f6c012 | 609 | static acpi_status |
4be44fcd LB |
610 | acpi_ut_get_package_object_size(union acpi_operand_object *internal_object, |
611 | acpi_size * obj_length) | |
1da177e4 | 612 | { |
4be44fcd LB |
613 | acpi_status status; |
614 | struct acpi_pkg_info info; | |
1da177e4 | 615 | |
b229cf92 | 616 | ACPI_FUNCTION_TRACE_PTR(ut_get_package_object_size, internal_object); |
1da177e4 | 617 | |
4be44fcd | 618 | info.length = 0; |
1da177e4 LT |
619 | info.object_space = 0; |
620 | info.num_packages = 1; | |
621 | ||
4be44fcd LB |
622 | status = acpi_ut_walk_package_tree(internal_object, NULL, |
623 | acpi_ut_get_element_length, &info); | |
624 | if (ACPI_FAILURE(status)) { | |
625 | return_ACPI_STATUS(status); | |
1da177e4 LT |
626 | } |
627 | ||
628 | /* | |
629 | * We have handled all of the objects in all levels of the package. | |
630 | * just add the length of the package objects themselves. | |
631 | * Round up to the next machine word. | |
632 | */ | |
4be44fcd LB |
633 | info.length += ACPI_ROUND_UP_TO_NATIVE_WORD(sizeof(union acpi_object)) * |
634 | (acpi_size) info.num_packages; | |
1da177e4 LT |
635 | |
636 | /* Return the total package length */ | |
637 | ||
638 | *obj_length = info.length; | |
4be44fcd | 639 | return_ACPI_STATUS(status); |
1da177e4 LT |
640 | } |
641 | ||
1da177e4 LT |
642 | /******************************************************************************* |
643 | * | |
644 | * FUNCTION: acpi_ut_get_object_size | |
645 | * | |
44f6c012 RM |
646 | * PARAMETERS: internal_object - An ACPI internal object |
647 | * obj_length - Where the length will be returned | |
1da177e4 LT |
648 | * |
649 | * RETURN: Status | |
650 | * | |
651 | * DESCRIPTION: This function is called to determine the space required to | |
652 | * contain an object for return to an API user. | |
653 | * | |
654 | ******************************************************************************/ | |
655 | ||
656 | acpi_status | |
4be44fcd LB |
657 | acpi_ut_get_object_size(union acpi_operand_object *internal_object, |
658 | acpi_size * obj_length) | |
1da177e4 | 659 | { |
4be44fcd LB |
660 | acpi_status status; |
661 | ||
662 | ACPI_FUNCTION_ENTRY(); | |
663 | ||
664 | if ((ACPI_GET_DESCRIPTOR_TYPE(internal_object) == | |
665 | ACPI_DESC_TYPE_OPERAND) | |
3371c19c | 666 | && (internal_object->common.type == ACPI_TYPE_PACKAGE)) { |
4be44fcd LB |
667 | status = |
668 | acpi_ut_get_package_object_size(internal_object, | |
669 | obj_length); | |
670 | } else { | |
671 | status = | |
672 | acpi_ut_get_simple_object_size(internal_object, obj_length); | |
1da177e4 LT |
673 | } |
674 | ||
675 | return (status); | |
676 | } |