Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsobject - Dispatcher object management routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
6c9deb72 | 8 | * Copyright (C) 2000 - 2007, R. Byron Moore |
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 LT |
44 | #include <acpi/acpi.h> |
45 | #include <acpi/acparser.h> | |
46 | #include <acpi/amlcode.h> | |
47 | #include <acpi/acdispat.h> | |
48 | #include <acpi/acnamesp.h> | |
49 | #include <acpi/acinterp.h> | |
50 | ||
51 | #define _COMPONENT ACPI_DISPATCHER | |
4be44fcd | 52 | ACPI_MODULE_NAME("dsobject") |
1da177e4 | 53 | |
defba1d8 | 54 | /* Local prototypes */ |
44f6c012 | 55 | static acpi_status |
4be44fcd LB |
56 | acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, |
57 | union acpi_parse_object *op, | |
58 | union acpi_operand_object **obj_desc_ptr); | |
1da177e4 LT |
59 | |
60 | #ifndef ACPI_NO_METHOD_EXECUTION | |
44f6c012 | 61 | /******************************************************************************* |
1da177e4 LT |
62 | * |
63 | * FUNCTION: acpi_ds_build_internal_object | |
64 | * | |
65 | * PARAMETERS: walk_state - Current walk state | |
66 | * Op - Parser object to be translated | |
67 | * obj_desc_ptr - Where the ACPI internal object is returned | |
68 | * | |
69 | * RETURN: Status | |
70 | * | |
71 | * DESCRIPTION: Translate a parser Op object to the equivalent namespace object | |
72 | * Simple objects are any objects other than a package object! | |
73 | * | |
44f6c012 | 74 | ******************************************************************************/ |
1da177e4 | 75 | |
44f6c012 | 76 | static acpi_status |
4be44fcd LB |
77 | acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, |
78 | union acpi_parse_object *op, | |
79 | union acpi_operand_object **obj_desc_ptr) | |
1da177e4 | 80 | { |
4be44fcd LB |
81 | union acpi_operand_object *obj_desc; |
82 | acpi_status status; | |
1da177e4 | 83 | |
b229cf92 | 84 | ACPI_FUNCTION_TRACE(ds_build_internal_object); |
1da177e4 LT |
85 | |
86 | *obj_desc_ptr = NULL; | |
87 | if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { | |
88 | /* | |
defba1d8 | 89 | * This is a named object reference. If this name was |
1da177e4 LT |
90 | * previously looked up in the namespace, it was stored in this op. |
91 | * Otherwise, go ahead and look it up now | |
92 | */ | |
93 | if (!op->common.node) { | |
4be44fcd LB |
94 | status = acpi_ns_lookup(walk_state->scope_info, |
95 | op->common.value.string, | |
96 | ACPI_TYPE_ANY, | |
97 | ACPI_IMODE_EXECUTE, | |
98 | ACPI_NS_SEARCH_PARENT | | |
99 | ACPI_NS_DONT_OPEN_SCOPE, NULL, | |
defba1d8 BM |
100 | ACPI_CAST_INDIRECT_PTR(struct |
101 | acpi_namespace_node, | |
102 | &(op-> | |
103 | common. | |
104 | node))); | |
4be44fcd | 105 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 106 | |
defba1d8 BM |
107 | /* Check if we are resolving a named reference within a package */ |
108 | ||
109 | if ((status == AE_NOT_FOUND) | |
110 | && (acpi_gbl_enable_interpreter_slack) | |
111 | && | |
112 | ((op->common.parent->common.aml_opcode == | |
113 | AML_PACKAGE_OP) | |
114 | || (op->common.parent->common.aml_opcode == | |
115 | AML_VAR_PACKAGE_OP))) { | |
116 | /* | |
117 | * We didn't find the target and we are populating elements | |
118 | * of a package - ignore if slack enabled. Some ASL code | |
119 | * contains dangling invalid references in packages and | |
120 | * expects that no exception will be issued. Leave the | |
121 | * element as a null element. It cannot be used, but it | |
122 | * can be overwritten by subsequent ASL code - this is | |
123 | * typically the case. | |
124 | */ | |
125 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
126 | "Ignoring unresolved reference in package [%4.4s]\n", | |
127 | walk_state-> | |
128 | scope_info->scope. | |
129 | node->name.ascii)); | |
130 | ||
131 | return_ACPI_STATUS(AE_OK); | |
132 | } else { | |
b8e4d893 BM |
133 | ACPI_ERROR_NAMESPACE(op->common.value. |
134 | string, status); | |
defba1d8 BM |
135 | } |
136 | ||
4be44fcd | 137 | return_ACPI_STATUS(status); |
1da177e4 LT |
138 | } |
139 | } | |
152c300d BM |
140 | |
141 | /* Special object resolution for elements of a package */ | |
142 | ||
143 | if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || | |
144 | (op->common.parent->common.aml_opcode == | |
145 | AML_VAR_PACKAGE_OP)) { | |
146 | /* | |
147 | * Attempt to resolve the node to a value before we insert it into | |
148 | * the package. If this is a reference to a common data type, | |
149 | * resolve it immediately. According to the ACPI spec, package | |
150 | * elements can only be "data objects" or method references. | |
151 | * Attempt to resolve to an Integer, Buffer, String or Package. | |
152 | * If cannot, return the named reference (for things like Devices, | |
153 | * Methods, etc.) Buffer Fields and Fields will resolve to simple | |
154 | * objects (int/buf/str/pkg). | |
155 | * | |
156 | * NOTE: References to things like Devices, Methods, Mutexes, etc. | |
157 | * will remain as named references. This behavior is not described | |
158 | * in the ACPI spec, but it appears to be an oversight. | |
159 | */ | |
160 | obj_desc = (union acpi_operand_object *)op->common.node; | |
161 | ||
162 | status = | |
163 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR | |
164 | (struct | |
165 | acpi_namespace_node, | |
166 | &obj_desc), | |
167 | walk_state); | |
168 | if (ACPI_FAILURE(status)) { | |
169 | return_ACPI_STATUS(status); | |
170 | } | |
171 | ||
172 | switch (op->common.node->type) { | |
173 | /* | |
174 | * For these types, we need the actual node, not the subobject. | |
175 | * However, the subobject got an extra reference count above. | |
176 | */ | |
177 | case ACPI_TYPE_MUTEX: | |
178 | case ACPI_TYPE_METHOD: | |
179 | case ACPI_TYPE_POWER: | |
180 | case ACPI_TYPE_PROCESSOR: | |
181 | case ACPI_TYPE_EVENT: | |
182 | case ACPI_TYPE_REGION: | |
183 | case ACPI_TYPE_DEVICE: | |
184 | case ACPI_TYPE_THERMAL: | |
185 | ||
186 | obj_desc = | |
187 | (union acpi_operand_object *)op->common. | |
188 | node; | |
189 | break; | |
190 | ||
191 | default: | |
192 | break; | |
193 | } | |
194 | ||
195 | /* | |
196 | * If above resolved to an operand object, we are done. Otherwise, | |
197 | * we have a NS node, we must create the package entry as a named | |
198 | * reference. | |
199 | */ | |
200 | if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) != | |
201 | ACPI_DESC_TYPE_NAMED) { | |
202 | goto exit; | |
203 | } | |
204 | } | |
1da177e4 LT |
205 | } |
206 | ||
defba1d8 | 207 | /* Create and init a new internal ACPI object */ |
1da177e4 | 208 | |
4be44fcd LB |
209 | obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info |
210 | (op->common.aml_opcode))-> | |
211 | object_type); | |
1da177e4 | 212 | if (!obj_desc) { |
4be44fcd | 213 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
214 | } |
215 | ||
4be44fcd LB |
216 | status = |
217 | acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode, | |
218 | &obj_desc); | |
219 | if (ACPI_FAILURE(status)) { | |
220 | acpi_ut_remove_reference(obj_desc); | |
221 | return_ACPI_STATUS(status); | |
1da177e4 LT |
222 | } |
223 | ||
152c300d | 224 | exit: |
1da177e4 | 225 | *obj_desc_ptr = obj_desc; |
4be44fcd | 226 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
227 | } |
228 | ||
44f6c012 | 229 | /******************************************************************************* |
1da177e4 LT |
230 | * |
231 | * FUNCTION: acpi_ds_build_internal_buffer_obj | |
232 | * | |
233 | * PARAMETERS: walk_state - Current walk state | |
234 | * Op - Parser object to be translated | |
235 | * buffer_length - Length of the buffer | |
236 | * obj_desc_ptr - Where the ACPI internal object is returned | |
237 | * | |
238 | * RETURN: Status | |
239 | * | |
240 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
241 | * namespace object | |
242 | * | |
44f6c012 | 243 | ******************************************************************************/ |
1da177e4 LT |
244 | |
245 | acpi_status | |
4be44fcd LB |
246 | acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state, |
247 | union acpi_parse_object *op, | |
248 | u32 buffer_length, | |
249 | union acpi_operand_object **obj_desc_ptr) | |
1da177e4 | 250 | { |
4be44fcd LB |
251 | union acpi_parse_object *arg; |
252 | union acpi_operand_object *obj_desc; | |
253 | union acpi_parse_object *byte_list; | |
254 | u32 byte_list_length = 0; | |
1da177e4 | 255 | |
b229cf92 | 256 | ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj); |
1da177e4 | 257 | |
defba1d8 BM |
258 | /* |
259 | * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". | |
260 | * The buffer object already exists (from the NS node), otherwise it must | |
261 | * be created. | |
262 | */ | |
1da177e4 | 263 | obj_desc = *obj_desc_ptr; |
defba1d8 | 264 | if (!obj_desc) { |
52fc0b02 | 265 | |
1da177e4 LT |
266 | /* Create a new buffer object */ |
267 | ||
4be44fcd | 268 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
1da177e4 LT |
269 | *obj_desc_ptr = obj_desc; |
270 | if (!obj_desc) { | |
4be44fcd | 271 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
272 | } |
273 | } | |
274 | ||
275 | /* | |
276 | * Second arg is the buffer data (optional) byte_list can be either | |
277 | * individual bytes or a string initializer. In either case, a | |
278 | * byte_list appears in the AML. | |
279 | */ | |
4be44fcd | 280 | arg = op->common.value.arg; /* skip first arg */ |
1da177e4 LT |
281 | |
282 | byte_list = arg->named.next; | |
283 | if (byte_list) { | |
284 | if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) { | |
b8e4d893 BM |
285 | ACPI_ERROR((AE_INFO, |
286 | "Expecting bytelist, got AML opcode %X in op %p", | |
287 | byte_list->common.aml_opcode, byte_list)); | |
1da177e4 | 288 | |
4be44fcd | 289 | acpi_ut_remove_reference(obj_desc); |
1da177e4 LT |
290 | return (AE_TYPE); |
291 | } | |
292 | ||
293 | byte_list_length = (u32) byte_list->common.value.integer; | |
294 | } | |
295 | ||
296 | /* | |
297 | * The buffer length (number of bytes) will be the larger of: | |
298 | * 1) The specified buffer length and | |
299 | * 2) The length of the initializer byte list | |
300 | */ | |
301 | obj_desc->buffer.length = buffer_length; | |
302 | if (byte_list_length > buffer_length) { | |
303 | obj_desc->buffer.length = byte_list_length; | |
304 | } | |
305 | ||
306 | /* Allocate the buffer */ | |
307 | ||
308 | if (obj_desc->buffer.length == 0) { | |
309 | obj_desc->buffer.pointer = NULL; | |
4be44fcd LB |
310 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
311 | "Buffer defined with zero length in AML, creating\n")); | |
312 | } else { | |
313 | obj_desc->buffer.pointer = | |
8313524a | 314 | ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length); |
1da177e4 | 315 | if (!obj_desc->buffer.pointer) { |
4be44fcd LB |
316 | acpi_ut_delete_object_desc(obj_desc); |
317 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
318 | } |
319 | ||
320 | /* Initialize buffer from the byte_list (if present) */ | |
321 | ||
322 | if (byte_list) { | |
4be44fcd LB |
323 | ACPI_MEMCPY(obj_desc->buffer.pointer, |
324 | byte_list->named.data, byte_list_length); | |
1da177e4 LT |
325 | } |
326 | } | |
327 | ||
328 | obj_desc->buffer.flags |= AOPOBJ_DATA_VALID; | |
8f9337c8 | 329 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 330 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
331 | } |
332 | ||
44f6c012 | 333 | /******************************************************************************* |
1da177e4 LT |
334 | * |
335 | * FUNCTION: acpi_ds_build_internal_package_obj | |
336 | * | |
337 | * PARAMETERS: walk_state - Current walk state | |
338 | * Op - Parser object to be translated | |
8f9337c8 BM |
339 | * element_count - Number of elements in the package - this is |
340 | * the num_elements argument to Package() | |
1da177e4 LT |
341 | * obj_desc_ptr - Where the ACPI internal object is returned |
342 | * | |
343 | * RETURN: Status | |
344 | * | |
345 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
346 | * namespace object | |
347 | * | |
8f9337c8 BM |
348 | * NOTE: The number of elements in the package will be always be the num_elements |
349 | * count, regardless of the number of elements in the package list. If | |
350 | * num_elements is smaller, only that many package list elements are used. | |
351 | * if num_elements is larger, the Package object is padded out with | |
352 | * objects of type Uninitialized (as per ACPI spec.) | |
353 | * | |
354 | * Even though the ASL compilers do not allow num_elements to be smaller | |
355 | * than the Package list length (for the fixed length package opcode), some | |
356 | * BIOS code modifies the AML on the fly to adjust the num_elements, and | |
357 | * this code compensates for that. This also provides compatibility with | |
358 | * other AML interpreters. | |
359 | * | |
44f6c012 | 360 | ******************************************************************************/ |
1da177e4 LT |
361 | |
362 | acpi_status | |
4be44fcd LB |
363 | acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, |
364 | union acpi_parse_object *op, | |
8f9337c8 | 365 | u32 element_count, |
4be44fcd | 366 | union acpi_operand_object **obj_desc_ptr) |
1da177e4 | 367 | { |
4be44fcd LB |
368 | union acpi_parse_object *arg; |
369 | union acpi_parse_object *parent; | |
370 | union acpi_operand_object *obj_desc = NULL; | |
4be44fcd | 371 | acpi_status status = AE_OK; |
defba1d8 | 372 | acpi_native_uint i; |
1da177e4 | 373 | |
b229cf92 | 374 | ACPI_FUNCTION_TRACE(ds_build_internal_package_obj); |
1da177e4 LT |
375 | |
376 | /* Find the parent of a possibly nested package */ | |
377 | ||
378 | parent = op->common.parent; | |
4be44fcd LB |
379 | while ((parent->common.aml_opcode == AML_PACKAGE_OP) || |
380 | (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { | |
1da177e4 LT |
381 | parent = parent->common.parent; |
382 | } | |
383 | ||
defba1d8 BM |
384 | /* |
385 | * If we are evaluating a Named package object "Name (xxxx, Package)", | |
386 | * the package object already exists, otherwise it must be created. | |
387 | */ | |
1da177e4 | 388 | obj_desc = *obj_desc_ptr; |
defba1d8 | 389 | if (!obj_desc) { |
4be44fcd | 390 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE); |
1da177e4 LT |
391 | *obj_desc_ptr = obj_desc; |
392 | if (!obj_desc) { | |
4be44fcd | 393 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
394 | } |
395 | ||
396 | obj_desc->package.node = parent->common.node; | |
397 | } | |
398 | ||
1da177e4 | 399 | /* |
8f9337c8 BM |
400 | * Allocate the element array (array of pointers to the individual |
401 | * objects) based on the num_elements parameter. Add an extra pointer slot | |
402 | * so that the list is always null terminated. | |
1da177e4 | 403 | */ |
8313524a | 404 | obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) |
8f9337c8 | 405 | element_count + |
8313524a | 406 | 1) * sizeof(void *)); |
1da177e4 LT |
407 | |
408 | if (!obj_desc->package.elements) { | |
4be44fcd LB |
409 | acpi_ut_delete_object_desc(obj_desc); |
410 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
411 | } |
412 | ||
8f9337c8 BM |
413 | obj_desc->package.count = element_count; |
414 | ||
1da177e4 | 415 | /* |
8f9337c8 BM |
416 | * Initialize the elements of the package, up to the num_elements count. |
417 | * Package is automatically padded with uninitialized (NULL) elements | |
418 | * if num_elements is greater than the package list length. Likewise, | |
419 | * Package is truncated if num_elements is less than the list length. | |
1da177e4 | 420 | */ |
1da177e4 LT |
421 | arg = op->common.value.arg; |
422 | arg = arg->common.next; | |
8f9337c8 | 423 | for (i = 0; arg && (i < element_count); i++) { |
1da177e4 | 424 | if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { |
152c300d BM |
425 | if (arg->common.node->type == ACPI_TYPE_METHOD) { |
426 | /* | |
427 | * A method reference "looks" to the parser to be a method | |
428 | * invocation, so we special case it here | |
429 | */ | |
430 | arg->common.aml_opcode = AML_INT_NAMEPATH_OP; | |
431 | status = | |
432 | acpi_ds_build_internal_object(walk_state, | |
433 | arg, | |
434 | &obj_desc-> | |
435 | package. | |
436 | elements[i]); | |
437 | } else { | |
438 | /* This package element is already built, just get it */ | |
439 | ||
440 | obj_desc->package.elements[i] = | |
441 | ACPI_CAST_PTR(union acpi_operand_object, | |
442 | arg->common.node); | |
443 | } | |
4be44fcd LB |
444 | } else { |
445 | status = acpi_ds_build_internal_object(walk_state, arg, | |
446 | &obj_desc-> | |
447 | package. | |
448 | elements[i]); | |
1da177e4 | 449 | } |
1da177e4 LT |
450 | arg = arg->common.next; |
451 | } | |
452 | ||
8f9337c8 BM |
453 | if (!arg) { |
454 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
455 | "Package List length larger than NumElements count (%X), truncated\n", | |
456 | element_count)); | |
457 | } | |
458 | ||
1da177e4 | 459 | obj_desc->package.flags |= AOPOBJ_DATA_VALID; |
8f9337c8 | 460 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 461 | return_ACPI_STATUS(status); |
1da177e4 LT |
462 | } |
463 | ||
44f6c012 | 464 | /******************************************************************************* |
1da177e4 LT |
465 | * |
466 | * FUNCTION: acpi_ds_create_node | |
467 | * | |
468 | * PARAMETERS: walk_state - Current walk state | |
469 | * Node - NS Node to be initialized | |
470 | * Op - Parser object to be translated | |
471 | * | |
472 | * RETURN: Status | |
473 | * | |
474 | * DESCRIPTION: Create the object to be associated with a namespace node | |
475 | * | |
44f6c012 | 476 | ******************************************************************************/ |
1da177e4 LT |
477 | |
478 | acpi_status | |
4be44fcd LB |
479 | acpi_ds_create_node(struct acpi_walk_state *walk_state, |
480 | struct acpi_namespace_node *node, | |
481 | union acpi_parse_object *op) | |
1da177e4 | 482 | { |
4be44fcd LB |
483 | acpi_status status; |
484 | union acpi_operand_object *obj_desc; | |
1da177e4 | 485 | |
b229cf92 | 486 | ACPI_FUNCTION_TRACE_PTR(ds_create_node, op); |
1da177e4 LT |
487 | |
488 | /* | |
489 | * Because of the execution pass through the non-control-method | |
490 | * parts of the table, we can arrive here twice. Only init | |
491 | * the named object node the first time through | |
492 | */ | |
4be44fcd LB |
493 | if (acpi_ns_get_attached_object(node)) { |
494 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
495 | } |
496 | ||
497 | if (!op->common.value.arg) { | |
52fc0b02 | 498 | |
1da177e4 LT |
499 | /* No arguments, there is nothing to do */ |
500 | ||
4be44fcd | 501 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
502 | } |
503 | ||
504 | /* Build an internal object for the argument(s) */ | |
505 | ||
4be44fcd LB |
506 | status = acpi_ds_build_internal_object(walk_state, op->common.value.arg, |
507 | &obj_desc); | |
508 | if (ACPI_FAILURE(status)) { | |
509 | return_ACPI_STATUS(status); | |
1da177e4 LT |
510 | } |
511 | ||
512 | /* Re-type the object according to its argument */ | |
513 | ||
4be44fcd | 514 | node->type = ACPI_GET_OBJECT_TYPE(obj_desc); |
1da177e4 LT |
515 | |
516 | /* Attach obj to node */ | |
517 | ||
4be44fcd | 518 | status = acpi_ns_attach_object(node, obj_desc, node->type); |
1da177e4 LT |
519 | |
520 | /* Remove local reference to the object */ | |
521 | ||
4be44fcd LB |
522 | acpi_ut_remove_reference(obj_desc); |
523 | return_ACPI_STATUS(status); | |
1da177e4 LT |
524 | } |
525 | ||
4be44fcd | 526 | #endif /* ACPI_NO_METHOD_EXECUTION */ |
1da177e4 | 527 | |
44f6c012 | 528 | /******************************************************************************* |
1da177e4 LT |
529 | * |
530 | * FUNCTION: acpi_ds_init_object_from_op | |
531 | * | |
532 | * PARAMETERS: walk_state - Current walk state | |
533 | * Op - Parser op used to init the internal object | |
534 | * Opcode - AML opcode associated with the object | |
535 | * ret_obj_desc - Namespace object to be initialized | |
536 | * | |
537 | * RETURN: Status | |
538 | * | |
539 | * DESCRIPTION: Initialize a namespace object from a parser Op and its | |
540 | * associated arguments. The namespace object is a more compact | |
541 | * representation of the Op and its arguments. | |
542 | * | |
44f6c012 | 543 | ******************************************************************************/ |
1da177e4 LT |
544 | |
545 | acpi_status | |
4be44fcd LB |
546 | acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, |
547 | union acpi_parse_object *op, | |
548 | u16 opcode, | |
549 | union acpi_operand_object **ret_obj_desc) | |
1da177e4 | 550 | { |
4be44fcd LB |
551 | const struct acpi_opcode_info *op_info; |
552 | union acpi_operand_object *obj_desc; | |
553 | acpi_status status = AE_OK; | |
1da177e4 | 554 | |
b229cf92 | 555 | ACPI_FUNCTION_TRACE(ds_init_object_from_op); |
1da177e4 LT |
556 | |
557 | obj_desc = *ret_obj_desc; | |
4be44fcd | 558 | op_info = acpi_ps_get_opcode_info(opcode); |
1da177e4 | 559 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 560 | |
1da177e4 LT |
561 | /* Unknown opcode */ |
562 | ||
4be44fcd | 563 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
564 | } |
565 | ||
566 | /* Perform per-object initialization */ | |
567 | ||
4be44fcd | 568 | switch (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
1da177e4 LT |
569 | case ACPI_TYPE_BUFFER: |
570 | ||
571 | /* | |
572 | * Defer evaluation of Buffer term_arg operand | |
573 | */ | |
8f9337c8 BM |
574 | obj_desc->buffer.node = |
575 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
576 | walk_state->operands[0]); | |
1da177e4 LT |
577 | obj_desc->buffer.aml_start = op->named.data; |
578 | obj_desc->buffer.aml_length = op->named.length; | |
579 | break; | |
580 | ||
1da177e4 LT |
581 | case ACPI_TYPE_PACKAGE: |
582 | ||
583 | /* | |
584 | * Defer evaluation of Package term_arg operand | |
585 | */ | |
8f9337c8 BM |
586 | obj_desc->package.node = |
587 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
588 | walk_state->operands[0]); | |
1da177e4 LT |
589 | obj_desc->package.aml_start = op->named.data; |
590 | obj_desc->package.aml_length = op->named.length; | |
591 | break; | |
592 | ||
1da177e4 LT |
593 | case ACPI_TYPE_INTEGER: |
594 | ||
595 | switch (op_info->type) { | |
596 | case AML_TYPE_CONSTANT: | |
597 | /* | |
598 | * Resolve AML Constants here - AND ONLY HERE! | |
599 | * All constants are integers. | |
44f6c012 RM |
600 | * We mark the integer with a flag that indicates that it started |
601 | * life as a constant -- so that stores to constants will perform | |
602 | * as expected (noop). zero_op is used as a placeholder for optional | |
603 | * target operands. | |
1da177e4 LT |
604 | */ |
605 | obj_desc->common.flags = AOPOBJ_AML_CONSTANT; | |
606 | ||
607 | switch (opcode) { | |
608 | case AML_ZERO_OP: | |
609 | ||
610 | obj_desc->integer.value = 0; | |
611 | break; | |
612 | ||
613 | case AML_ONE_OP: | |
614 | ||
615 | obj_desc->integer.value = 1; | |
616 | break; | |
617 | ||
618 | case AML_ONES_OP: | |
619 | ||
620 | obj_desc->integer.value = ACPI_INTEGER_MAX; | |
621 | ||
622 | /* Truncate value if we are executing from a 32-bit ACPI table */ | |
623 | ||
624 | #ifndef ACPI_NO_METHOD_EXECUTION | |
4be44fcd | 625 | acpi_ex_truncate_for32bit_table(obj_desc); |
1da177e4 LT |
626 | #endif |
627 | break; | |
628 | ||
629 | case AML_REVISION_OP: | |
630 | ||
631 | obj_desc->integer.value = ACPI_CA_VERSION; | |
632 | break; | |
633 | ||
634 | default: | |
635 | ||
b8e4d893 BM |
636 | ACPI_ERROR((AE_INFO, |
637 | "Unknown constant opcode %X", | |
638 | opcode)); | |
1da177e4 LT |
639 | status = AE_AML_OPERAND_TYPE; |
640 | break; | |
641 | } | |
642 | break; | |
643 | ||
1da177e4 LT |
644 | case AML_TYPE_LITERAL: |
645 | ||
646 | obj_desc->integer.value = op->common.value.integer; | |
6f42ccf2 | 647 | #ifndef ACPI_NO_METHOD_EXECUTION |
4be44fcd | 648 | acpi_ex_truncate_for32bit_table(obj_desc); |
6f42ccf2 | 649 | #endif |
1da177e4 LT |
650 | break; |
651 | ||
1da177e4 | 652 | default: |
b8e4d893 BM |
653 | ACPI_ERROR((AE_INFO, "Unknown Integer type %X", |
654 | op_info->type)); | |
1da177e4 LT |
655 | status = AE_AML_OPERAND_TYPE; |
656 | break; | |
657 | } | |
658 | break; | |
659 | ||
1da177e4 LT |
660 | case ACPI_TYPE_STRING: |
661 | ||
662 | obj_desc->string.pointer = op->common.value.string; | |
4be44fcd LB |
663 | obj_desc->string.length = |
664 | (u32) ACPI_STRLEN(op->common.value.string); | |
1da177e4 LT |
665 | |
666 | /* | |
667 | * The string is contained in the ACPI table, don't ever try | |
668 | * to delete it | |
669 | */ | |
670 | obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; | |
671 | break; | |
672 | ||
1da177e4 LT |
673 | case ACPI_TYPE_METHOD: |
674 | break; | |
675 | ||
1da177e4 LT |
676 | case ACPI_TYPE_LOCAL_REFERENCE: |
677 | ||
678 | switch (op_info->type) { | |
679 | case AML_TYPE_LOCAL_VARIABLE: | |
680 | ||
681 | /* Split the opcode into a base opcode + offset */ | |
682 | ||
683 | obj_desc->reference.opcode = AML_LOCAL_OP; | |
684 | obj_desc->reference.offset = opcode - AML_LOCAL_OP; | |
685 | ||
686 | #ifndef ACPI_NO_METHOD_EXECUTION | |
4be44fcd LB |
687 | status = acpi_ds_method_data_get_node(AML_LOCAL_OP, |
688 | obj_desc-> | |
689 | reference.offset, | |
690 | walk_state, | |
691 | (struct | |
692 | acpi_namespace_node | |
693 | **)&obj_desc-> | |
694 | reference.object); | |
1da177e4 LT |
695 | #endif |
696 | break; | |
697 | ||
1da177e4 LT |
698 | case AML_TYPE_METHOD_ARGUMENT: |
699 | ||
700 | /* Split the opcode into a base opcode + offset */ | |
701 | ||
702 | obj_desc->reference.opcode = AML_ARG_OP; | |
703 | obj_desc->reference.offset = opcode - AML_ARG_OP; | |
704 | ||
705 | #ifndef ACPI_NO_METHOD_EXECUTION | |
4be44fcd LB |
706 | status = acpi_ds_method_data_get_node(AML_ARG_OP, |
707 | obj_desc-> | |
708 | reference.offset, | |
709 | walk_state, | |
710 | (struct | |
711 | acpi_namespace_node | |
712 | **)&obj_desc-> | |
713 | reference.object); | |
1da177e4 LT |
714 | #endif |
715 | break; | |
716 | ||
4be44fcd | 717 | default: /* Other literals, etc.. */ |
1da177e4 LT |
718 | |
719 | if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { | |
52fc0b02 | 720 | |
1da177e4 LT |
721 | /* Node was saved in Op */ |
722 | ||
723 | obj_desc->reference.node = op->common.node; | |
724 | } | |
725 | ||
726 | obj_desc->reference.opcode = opcode; | |
727 | break; | |
728 | } | |
729 | break; | |
730 | ||
1da177e4 LT |
731 | default: |
732 | ||
b8e4d893 BM |
733 | ACPI_ERROR((AE_INFO, "Unimplemented data type: %X", |
734 | ACPI_GET_OBJECT_TYPE(obj_desc))); | |
1da177e4 LT |
735 | |
736 | status = AE_AML_OPERAND_TYPE; | |
737 | break; | |
738 | } | |
739 | ||
4be44fcd | 740 | return_ACPI_STATUS(status); |
1da177e4 | 741 | } |