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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: exresolv - AML Interpreter object resolution | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, 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 "amlcode.h" | |
47 | #include "acdispat.h" | |
48 | #include "acinterp.h" | |
49 | #include "acnamesp.h" | |
1da177e4 | 50 | |
1da177e4 | 51 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 52 | ACPI_MODULE_NAME("exresolv") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local prototypes */ |
44f6c012 | 55 | static acpi_status |
4be44fcd LB |
56 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
57 | struct acpi_walk_state *walk_state); | |
1da177e4 LT |
58 | |
59 | /******************************************************************************* | |
60 | * | |
61 | * FUNCTION: acpi_ex_resolve_to_value | |
62 | * | |
63 | * PARAMETERS: **stack_ptr - Points to entry on obj_stack, which can | |
64 | * be either an (union acpi_operand_object *) | |
65 | * or an acpi_handle. | |
66 | * walk_state - Current method state | |
67 | * | |
68 | * RETURN: Status | |
69 | * | |
70 | * DESCRIPTION: Convert Reference objects to values | |
71 | * | |
72 | ******************************************************************************/ | |
73 | ||
74 | acpi_status | |
4be44fcd LB |
75 | acpi_ex_resolve_to_value(union acpi_operand_object **stack_ptr, |
76 | struct acpi_walk_state *walk_state) | |
1da177e4 | 77 | { |
4be44fcd | 78 | acpi_status status; |
1da177e4 | 79 | |
b229cf92 | 80 | ACPI_FUNCTION_TRACE_PTR(ex_resolve_to_value, stack_ptr); |
1da177e4 LT |
81 | |
82 | if (!stack_ptr || !*stack_ptr) { | |
b8e4d893 | 83 | ACPI_ERROR((AE_INFO, "Internal - null pointer")); |
4be44fcd | 84 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
85 | } |
86 | ||
87 | /* | |
88 | * The entity pointed to by the stack_ptr can be either | |
89 | * 1) A valid union acpi_operand_object, or | |
90 | * 2) A struct acpi_namespace_node (named_obj) | |
91 | */ | |
4be44fcd LB |
92 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_OPERAND) { |
93 | status = acpi_ex_resolve_object_to_value(stack_ptr, walk_state); | |
94 | if (ACPI_FAILURE(status)) { | |
95 | return_ACPI_STATUS(status); | |
1da177e4 | 96 | } |
44f6c012 RM |
97 | |
98 | if (!*stack_ptr) { | |
b8e4d893 | 99 | ACPI_ERROR((AE_INFO, "Internal - null pointer")); |
4be44fcd | 100 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
44f6c012 | 101 | } |
1da177e4 LT |
102 | } |
103 | ||
104 | /* | |
105 | * Object on the stack may have changed if acpi_ex_resolve_object_to_value() | |
106 | * was called (i.e., we can't use an _else_ here.) | |
107 | */ | |
4be44fcd LB |
108 | if (ACPI_GET_DESCRIPTOR_TYPE(*stack_ptr) == ACPI_DESC_TYPE_NAMED) { |
109 | status = | |
110 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR | |
111 | (struct acpi_namespace_node, | |
112 | stack_ptr), walk_state); | |
113 | if (ACPI_FAILURE(status)) { | |
114 | return_ACPI_STATUS(status); | |
1da177e4 LT |
115 | } |
116 | } | |
117 | ||
4be44fcd LB |
118 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Resolved object %p\n", *stack_ptr)); |
119 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
120 | } |
121 | ||
1da177e4 LT |
122 | /******************************************************************************* |
123 | * | |
124 | * FUNCTION: acpi_ex_resolve_object_to_value | |
125 | * | |
44f6c012 | 126 | * PARAMETERS: stack_ptr - Pointer to an internal object |
1da177e4 LT |
127 | * walk_state - Current method state |
128 | * | |
129 | * RETURN: Status | |
130 | * | |
44f6c012 | 131 | * DESCRIPTION: Retrieve the value from an internal object. The Reference type |
1da177e4 LT |
132 | * uses the associated AML opcode to determine the value. |
133 | * | |
134 | ******************************************************************************/ | |
135 | ||
44f6c012 | 136 | static acpi_status |
4be44fcd LB |
137 | acpi_ex_resolve_object_to_value(union acpi_operand_object **stack_ptr, |
138 | struct acpi_walk_state *walk_state) | |
1da177e4 | 139 | { |
4be44fcd LB |
140 | acpi_status status = AE_OK; |
141 | union acpi_operand_object *stack_desc; | |
65e4b9b0 | 142 | union acpi_operand_object *obj_desc = NULL; |
1044f1f6 | 143 | u8 ref_type; |
1da177e4 | 144 | |
b229cf92 | 145 | ACPI_FUNCTION_TRACE(ex_resolve_object_to_value); |
1da177e4 LT |
146 | |
147 | stack_desc = *stack_ptr; | |
148 | ||
cf48958e | 149 | /* This is an object of type union acpi_operand_object */ |
1da177e4 | 150 | |
3371c19c | 151 | switch (stack_desc->common.type) { |
1da177e4 LT |
152 | case ACPI_TYPE_LOCAL_REFERENCE: |
153 | ||
1044f1f6 | 154 | ref_type = stack_desc->reference.class; |
1da177e4 | 155 | |
1044f1f6 BM |
156 | switch (ref_type) { |
157 | case ACPI_REFCLASS_LOCAL: | |
158 | case ACPI_REFCLASS_ARG: | |
1da177e4 LT |
159 | /* |
160 | * Get the local from the method's state info | |
161 | * Note: this increments the local's object reference count | |
162 | */ | |
1044f1f6 | 163 | status = acpi_ds_method_data_get_value(ref_type, |
4be44fcd | 164 | stack_desc-> |
1044f1f6 | 165 | reference.value, |
4be44fcd LB |
166 | walk_state, |
167 | &obj_desc); | |
168 | if (ACPI_FAILURE(status)) { | |
169 | return_ACPI_STATUS(status); | |
1da177e4 LT |
170 | } |
171 | ||
4be44fcd | 172 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
b229cf92 | 173 | "[Arg/Local %X] ValueObj is %p\n", |
1044f1f6 | 174 | stack_desc->reference.value, |
4be44fcd | 175 | obj_desc)); |
1da177e4 LT |
176 | |
177 | /* | |
178 | * Now we can delete the original Reference Object and | |
179 | * replace it with the resolved value | |
180 | */ | |
4be44fcd | 181 | acpi_ut_remove_reference(stack_desc); |
1da177e4 LT |
182 | *stack_ptr = obj_desc; |
183 | break; | |
184 | ||
1044f1f6 | 185 | case ACPI_REFCLASS_INDEX: |
1da177e4 LT |
186 | |
187 | switch (stack_desc->reference.target_type) { | |
188 | case ACPI_TYPE_BUFFER_FIELD: | |
189 | ||
1cb2ef66 | 190 | /* Just return - do not dereference */ |
1da177e4 LT |
191 | break; |
192 | ||
1da177e4 LT |
193 | case ACPI_TYPE_PACKAGE: |
194 | ||
1cb2ef66 | 195 | /* If method call or copy_object - do not dereference */ |
e5bcc811 | 196 | |
1cb2ef66 LM |
197 | if ((walk_state->opcode == |
198 | AML_INT_METHODCALL_OP) | |
199 | || (walk_state->opcode == AML_COPY_OP)) { | |
e5bcc811 LM |
200 | break; |
201 | } | |
202 | ||
1cb2ef66 LM |
203 | /* Otherwise, dereference the package_index to a package element */ |
204 | ||
1da177e4 LT |
205 | obj_desc = *stack_desc->reference.where; |
206 | if (obj_desc) { | |
207 | /* | |
1cb2ef66 | 208 | * Valid object descriptor, copy pointer to return value |
1da177e4 LT |
209 | * (i.e., dereference the package index) |
210 | * Delete the ref object, increment the returned object | |
211 | */ | |
4be44fcd LB |
212 | acpi_ut_remove_reference(stack_desc); |
213 | acpi_ut_add_reference(obj_desc); | |
1da177e4 | 214 | *stack_ptr = obj_desc; |
4be44fcd | 215 | } else { |
1da177e4 | 216 | /* |
1cb2ef66 | 217 | * A NULL object descriptor means an uninitialized element of |
1da177e4 LT |
218 | * the package, can't dereference it |
219 | */ | |
b8e4d893 | 220 | ACPI_ERROR((AE_INFO, |
e5bcc811 | 221 | "Attempt to dereference an Index to NULL package element Idx=%p", |
b8e4d893 | 222 | stack_desc)); |
1da177e4 LT |
223 | status = AE_AML_UNINITIALIZED_ELEMENT; |
224 | } | |
225 | break; | |
226 | ||
1da177e4 LT |
227 | default: |
228 | ||
229 | /* Invalid reference object */ | |
230 | ||
b8e4d893 | 231 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 232 | "Unknown TargetType 0x%X in Index/Reference object %p", |
b8e4d893 BM |
233 | stack_desc->reference.target_type, |
234 | stack_desc)); | |
1da177e4 LT |
235 | status = AE_AML_INTERNAL; |
236 | break; | |
237 | } | |
238 | break; | |
239 | ||
1044f1f6 BM |
240 | case ACPI_REFCLASS_REFOF: |
241 | case ACPI_REFCLASS_DEBUG: | |
242 | case ACPI_REFCLASS_TABLE: | |
1da177e4 | 243 | |
1cb2ef66 | 244 | /* Just leave the object as-is, do not dereference */ |
1da177e4 LT |
245 | |
246 | break; | |
247 | ||
1044f1f6 | 248 | case ACPI_REFCLASS_NAME: /* Reference to a named object */ |
44f6c012 | 249 | |
4c90ece2 BM |
250 | /* Dereference the name */ |
251 | ||
252 | if ((stack_desc->reference.node->type == | |
253 | ACPI_TYPE_DEVICE) | |
254 | || (stack_desc->reference.node->type == | |
255 | ACPI_TYPE_THERMAL)) { | |
256 | ||
257 | /* These node types do not have 'real' subobjects */ | |
258 | ||
259 | *stack_ptr = (void *)stack_desc->reference.node; | |
260 | } else { | |
261 | /* Get the object pointed to by the namespace node */ | |
262 | ||
263 | *stack_ptr = | |
264 | (stack_desc->reference.node)->object; | |
265 | acpi_ut_add_reference(*stack_ptr); | |
266 | } | |
44f6c012 | 267 | |
4be44fcd | 268 | acpi_ut_remove_reference(stack_desc); |
44f6c012 | 269 | break; |
1da177e4 LT |
270 | |
271 | default: | |
272 | ||
b8e4d893 | 273 | ACPI_ERROR((AE_INFO, |
f6a22b0b BM |
274 | "Unknown Reference type 0x%X in %p", |
275 | ref_type, stack_desc)); | |
1da177e4 LT |
276 | status = AE_AML_INTERNAL; |
277 | break; | |
278 | } | |
279 | break; | |
280 | ||
1da177e4 LT |
281 | case ACPI_TYPE_BUFFER: |
282 | ||
4be44fcd | 283 | status = acpi_ds_get_buffer_arguments(stack_desc); |
1da177e4 LT |
284 | break; |
285 | ||
1da177e4 LT |
286 | case ACPI_TYPE_PACKAGE: |
287 | ||
4be44fcd | 288 | status = acpi_ds_get_package_arguments(stack_desc); |
1da177e4 LT |
289 | break; |
290 | ||
1da177e4 LT |
291 | case ACPI_TYPE_BUFFER_FIELD: |
292 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
293 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
294 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
295 | ||
4be44fcd | 296 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
b229cf92 | 297 | "FieldRead SourceDesc=%p Type=%X\n", |
3371c19c | 298 | stack_desc, stack_desc->common.type)); |
1da177e4 | 299 | |
4be44fcd LB |
300 | status = |
301 | acpi_ex_read_data_from_field(walk_state, stack_desc, | |
302 | &obj_desc); | |
65e4b9b0 FS |
303 | |
304 | /* Remove a reference to the original operand, then override */ | |
305 | ||
306 | acpi_ut_remove_reference(*stack_ptr); | |
4be44fcd | 307 | *stack_ptr = (void *)obj_desc; |
1da177e4 LT |
308 | break; |
309 | ||
310 | default: | |
1d1ea1b7 | 311 | |
1da177e4 LT |
312 | break; |
313 | } | |
314 | ||
4be44fcd | 315 | return_ACPI_STATUS(status); |
1da177e4 LT |
316 | } |
317 | ||
1da177e4 LT |
318 | /******************************************************************************* |
319 | * | |
320 | * FUNCTION: acpi_ex_resolve_multiple | |
321 | * | |
322 | * PARAMETERS: walk_state - Current state (contains AML opcode) | |
ba494bee | 323 | * operand - Starting point for resolution |
1da177e4 LT |
324 | * return_type - Where the object type is returned |
325 | * return_desc - Where the resolved object is returned | |
326 | * | |
327 | * RETURN: Status | |
328 | * | |
73a3090a | 329 | * DESCRIPTION: Return the base object and type. Traverse a reference list if |
1da177e4 LT |
330 | * necessary to get to the base object. |
331 | * | |
332 | ******************************************************************************/ | |
333 | ||
334 | acpi_status | |
4be44fcd LB |
335 | acpi_ex_resolve_multiple(struct acpi_walk_state *walk_state, |
336 | union acpi_operand_object *operand, | |
337 | acpi_object_type * return_type, | |
338 | union acpi_operand_object **return_desc) | |
1da177e4 | 339 | { |
4be44fcd LB |
340 | union acpi_operand_object *obj_desc = (void *)operand; |
341 | struct acpi_namespace_node *node; | |
342 | acpi_object_type type; | |
343 | acpi_status status; | |
1da177e4 | 344 | |
b229cf92 | 345 | ACPI_FUNCTION_TRACE(acpi_ex_resolve_multiple); |
1da177e4 | 346 | |
44f6c012 RM |
347 | /* Operand can be either a namespace node or an operand descriptor */ |
348 | ||
4be44fcd | 349 | switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { |
1da177e4 | 350 | case ACPI_DESC_TYPE_OPERAND: |
1d1ea1b7 | 351 | |
1da177e4 LT |
352 | type = obj_desc->common.type; |
353 | break; | |
354 | ||
355 | case ACPI_DESC_TYPE_NAMED: | |
1d1ea1b7 | 356 | |
4be44fcd LB |
357 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
358 | obj_desc = | |
359 | acpi_ns_get_attached_object((struct acpi_namespace_node *) | |
360 | obj_desc); | |
1da177e4 LT |
361 | |
362 | /* If we had an Alias node, use the attached object for type info */ | |
363 | ||
364 | if (type == ACPI_TYPE_LOCAL_ALIAS) { | |
4be44fcd LB |
365 | type = ((struct acpi_namespace_node *)obj_desc)->type; |
366 | obj_desc = | |
367 | acpi_ns_get_attached_object((struct | |
368 | acpi_namespace_node *) | |
369 | obj_desc); | |
1da177e4 LT |
370 | } |
371 | break; | |
372 | ||
373 | default: | |
4be44fcd | 374 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
375 | } |
376 | ||
44f6c012 | 377 | /* If type is anything other than a reference, we are done */ |
1da177e4 | 378 | |
1da177e4 LT |
379 | if (type != ACPI_TYPE_LOCAL_REFERENCE) { |
380 | goto exit; | |
381 | } | |
382 | ||
383 | /* | |
bc7a36ab LM |
384 | * For reference objects created via the ref_of, Index, or Load/load_table |
385 | * operators, we need to get to the base object (as per the ACPI | |
386 | * specification of the object_type and size_of operators). This means | |
387 | * traversing the list of possibly many nested references. | |
1da177e4 | 388 | */ |
3371c19c | 389 | while (obj_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE) { |
1044f1f6 BM |
390 | switch (obj_desc->reference.class) { |
391 | case ACPI_REFCLASS_REFOF: | |
392 | case ACPI_REFCLASS_NAME: | |
1da177e4 LT |
393 | |
394 | /* Dereference the reference pointer */ | |
395 | ||
1044f1f6 | 396 | if (obj_desc->reference.class == ACPI_REFCLASS_REFOF) { |
52fc0b02 BM |
397 | node = obj_desc->reference.object; |
398 | } else { /* AML_INT_NAMEPATH_OP */ | |
399 | ||
400 | node = obj_desc->reference.node; | |
401 | } | |
1da177e4 LT |
402 | |
403 | /* All "References" point to a NS node */ | |
404 | ||
4be44fcd LB |
405 | if (ACPI_GET_DESCRIPTOR_TYPE(node) != |
406 | ACPI_DESC_TYPE_NAMED) { | |
f6a22b0b BM |
407 | ACPI_ERROR((AE_INFO, |
408 | "Not a namespace node %p [%s]", | |
b8e4d893 BM |
409 | node, |
410 | acpi_ut_get_descriptor_name(node))); | |
4be44fcd | 411 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
412 | } |
413 | ||
414 | /* Get the attached object */ | |
415 | ||
4be44fcd | 416 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 | 417 | if (!obj_desc) { |
52fc0b02 | 418 | |
1da177e4 LT |
419 | /* No object, use the NS node type */ |
420 | ||
4be44fcd | 421 | type = acpi_ns_get_type(node); |
1da177e4 LT |
422 | goto exit; |
423 | } | |
424 | ||
425 | /* Check for circular references */ | |
426 | ||
427 | if (obj_desc == operand) { | |
4be44fcd | 428 | return_ACPI_STATUS(AE_AML_CIRCULAR_REFERENCE); |
1da177e4 LT |
429 | } |
430 | break; | |
431 | ||
1044f1f6 | 432 | case ACPI_REFCLASS_INDEX: |
1da177e4 LT |
433 | |
434 | /* Get the type of this reference (index into another object) */ | |
435 | ||
436 | type = obj_desc->reference.target_type; | |
437 | if (type != ACPI_TYPE_PACKAGE) { | |
438 | goto exit; | |
439 | } | |
440 | ||
441 | /* | |
442 | * The main object is a package, we want to get the type | |
443 | * of the individual package element that is referenced by | |
444 | * the index. | |
445 | * | |
446 | * This could of course in turn be another reference object. | |
447 | */ | |
448 | obj_desc = *(obj_desc->reference.where); | |
449 | if (!obj_desc) { | |
52fc0b02 | 450 | |
1da177e4 LT |
451 | /* NULL package elements are allowed */ |
452 | ||
4be44fcd | 453 | type = 0; /* Uninitialized */ |
1da177e4 LT |
454 | goto exit; |
455 | } | |
456 | break; | |
457 | ||
1044f1f6 | 458 | case ACPI_REFCLASS_TABLE: |
bc7a36ab LM |
459 | |
460 | type = ACPI_TYPE_DDB_HANDLE; | |
461 | goto exit; | |
462 | ||
1044f1f6 BM |
463 | case ACPI_REFCLASS_LOCAL: |
464 | case ACPI_REFCLASS_ARG: | |
1da177e4 LT |
465 | |
466 | if (return_desc) { | |
4be44fcd LB |
467 | status = |
468 | acpi_ds_method_data_get_value(obj_desc-> | |
469 | reference. | |
1044f1f6 | 470 | class, |
4be44fcd LB |
471 | obj_desc-> |
472 | reference. | |
1044f1f6 | 473 | value, |
4be44fcd LB |
474 | walk_state, |
475 | &obj_desc); | |
476 | if (ACPI_FAILURE(status)) { | |
477 | return_ACPI_STATUS(status); | |
1da177e4 | 478 | } |
4be44fcd LB |
479 | acpi_ut_remove_reference(obj_desc); |
480 | } else { | |
481 | status = | |
482 | acpi_ds_method_data_get_node(obj_desc-> | |
483 | reference. | |
1044f1f6 | 484 | class, |
4be44fcd LB |
485 | obj_desc-> |
486 | reference. | |
1044f1f6 | 487 | value, |
4be44fcd LB |
488 | walk_state, |
489 | &node); | |
490 | if (ACPI_FAILURE(status)) { | |
491 | return_ACPI_STATUS(status); | |
1da177e4 LT |
492 | } |
493 | ||
4be44fcd | 494 | obj_desc = acpi_ns_get_attached_object(node); |
1da177e4 LT |
495 | if (!obj_desc) { |
496 | type = ACPI_TYPE_ANY; | |
497 | goto exit; | |
498 | } | |
499 | } | |
500 | break; | |
501 | ||
1044f1f6 | 502 | case ACPI_REFCLASS_DEBUG: |
1da177e4 | 503 | |
b229cf92 | 504 | /* The Debug Object is of type "DebugObject" */ |
1da177e4 LT |
505 | |
506 | type = ACPI_TYPE_DEBUG_OBJECT; | |
507 | goto exit; | |
508 | ||
1da177e4 LT |
509 | default: |
510 | ||
b8e4d893 | 511 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 512 | "Unknown Reference Class 0x%2.2X", |
1044f1f6 | 513 | obj_desc->reference.class)); |
4be44fcd | 514 | return_ACPI_STATUS(AE_AML_INTERNAL); |
1da177e4 LT |
515 | } |
516 | } | |
517 | ||
518 | /* | |
519 | * Now we are guaranteed to have an object that has not been created | |
520 | * via the ref_of or Index operators. | |
521 | */ | |
3371c19c | 522 | type = obj_desc->common.type; |
1da177e4 | 523 | |
4be44fcd | 524 | exit: |
1da177e4 LT |
525 | /* Convert internal types to external types */ |
526 | ||
527 | switch (type) { | |
528 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
529 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
530 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
531 | ||
532 | type = ACPI_TYPE_FIELD_UNIT; | |
533 | break; | |
534 | ||
535 | case ACPI_TYPE_LOCAL_SCOPE: | |
536 | ||
537 | /* Per ACPI Specification, Scope is untyped */ | |
538 | ||
539 | type = ACPI_TYPE_ANY; | |
540 | break; | |
541 | ||
542 | default: | |
1d1ea1b7 | 543 | |
1da177e4 | 544 | /* No change to Type required */ |
1d1ea1b7 | 545 | |
1da177e4 LT |
546 | break; |
547 | } | |
548 | ||
549 | *return_type = type; | |
550 | if (return_desc) { | |
551 | *return_desc = obj_desc; | |
552 | } | |
4be44fcd | 553 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 554 | } |