]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsobject - Dispatcher object management 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 "acparser.h" | |
47 | #include "amlcode.h" | |
48 | #include "acdispat.h" | |
49 | #include "acnamesp.h" | |
50 | #include "acinterp.h" | |
1da177e4 LT |
51 | |
52 | #define _COMPONENT ACPI_DISPATCHER | |
4be44fcd | 53 | ACPI_MODULE_NAME("dsobject") |
1da177e4 | 54 | |
defba1d8 | 55 | /* Local prototypes */ |
44f6c012 | 56 | static acpi_status |
4be44fcd LB |
57 | acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, |
58 | union acpi_parse_object *op, | |
59 | union acpi_operand_object **obj_desc_ptr); | |
1da177e4 LT |
60 | |
61 | #ifndef ACPI_NO_METHOD_EXECUTION | |
44f6c012 | 62 | /******************************************************************************* |
1da177e4 LT |
63 | * |
64 | * FUNCTION: acpi_ds_build_internal_object | |
65 | * | |
66 | * PARAMETERS: walk_state - Current walk state | |
67 | * Op - Parser object to be translated | |
68 | * obj_desc_ptr - Where the ACPI internal object is returned | |
69 | * | |
70 | * RETURN: Status | |
71 | * | |
72 | * DESCRIPTION: Translate a parser Op object to the equivalent namespace object | |
73 | * Simple objects are any objects other than a package object! | |
74 | * | |
44f6c012 | 75 | ******************************************************************************/ |
1da177e4 | 76 | |
44f6c012 | 77 | static acpi_status |
4be44fcd LB |
78 | acpi_ds_build_internal_object(struct acpi_walk_state *walk_state, |
79 | union acpi_parse_object *op, | |
80 | union acpi_operand_object **obj_desc_ptr) | |
1da177e4 | 81 | { |
4be44fcd LB |
82 | union acpi_operand_object *obj_desc; |
83 | acpi_status status; | |
1da177e4 | 84 | |
b229cf92 | 85 | ACPI_FUNCTION_TRACE(ds_build_internal_object); |
1da177e4 LT |
86 | |
87 | *obj_desc_ptr = NULL; | |
88 | if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { | |
89 | /* | |
defba1d8 | 90 | * This is a named object reference. If this name was |
1da177e4 LT |
91 | * previously looked up in the namespace, it was stored in this op. |
92 | * Otherwise, go ahead and look it up now | |
93 | */ | |
94 | if (!op->common.node) { | |
4be44fcd LB |
95 | status = acpi_ns_lookup(walk_state->scope_info, |
96 | op->common.value.string, | |
97 | ACPI_TYPE_ANY, | |
98 | ACPI_IMODE_EXECUTE, | |
99 | ACPI_NS_SEARCH_PARENT | | |
100 | ACPI_NS_DONT_OPEN_SCOPE, NULL, | |
defba1d8 BM |
101 | ACPI_CAST_INDIRECT_PTR(struct |
102 | acpi_namespace_node, | |
103 | &(op-> | |
104 | common. | |
105 | node))); | |
4be44fcd | 106 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 107 | |
defba1d8 BM |
108 | /* Check if we are resolving a named reference within a package */ |
109 | ||
110 | if ((status == AE_NOT_FOUND) | |
111 | && (acpi_gbl_enable_interpreter_slack) | |
112 | && | |
113 | ((op->common.parent->common.aml_opcode == | |
114 | AML_PACKAGE_OP) | |
115 | || (op->common.parent->common.aml_opcode == | |
116 | AML_VAR_PACKAGE_OP))) { | |
117 | /* | |
118 | * We didn't find the target and we are populating elements | |
119 | * of a package - ignore if slack enabled. Some ASL code | |
120 | * contains dangling invalid references in packages and | |
121 | * expects that no exception will be issued. Leave the | |
122 | * element as a null element. It cannot be used, but it | |
123 | * can be overwritten by subsequent ASL code - this is | |
124 | * typically the case. | |
125 | */ | |
126 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
127 | "Ignoring unresolved reference in package [%4.4s]\n", | |
128 | walk_state-> | |
129 | scope_info->scope. | |
130 | node->name.ascii)); | |
131 | ||
132 | return_ACPI_STATUS(AE_OK); | |
133 | } else { | |
b8e4d893 BM |
134 | ACPI_ERROR_NAMESPACE(op->common.value. |
135 | string, status); | |
defba1d8 BM |
136 | } |
137 | ||
4be44fcd | 138 | return_ACPI_STATUS(status); |
1da177e4 LT |
139 | } |
140 | } | |
152c300d BM |
141 | |
142 | /* Special object resolution for elements of a package */ | |
143 | ||
144 | if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || | |
145 | (op->common.parent->common.aml_opcode == | |
146 | AML_VAR_PACKAGE_OP)) { | |
147 | /* | |
148 | * Attempt to resolve the node to a value before we insert it into | |
149 | * the package. If this is a reference to a common data type, | |
150 | * resolve it immediately. According to the ACPI spec, package | |
151 | * elements can only be "data objects" or method references. | |
152 | * Attempt to resolve to an Integer, Buffer, String or Package. | |
153 | * If cannot, return the named reference (for things like Devices, | |
154 | * Methods, etc.) Buffer Fields and Fields will resolve to simple | |
155 | * objects (int/buf/str/pkg). | |
156 | * | |
157 | * NOTE: References to things like Devices, Methods, Mutexes, etc. | |
158 | * will remain as named references. This behavior is not described | |
159 | * in the ACPI spec, but it appears to be an oversight. | |
160 | */ | |
b7f9f042 BM |
161 | obj_desc = |
162 | ACPI_CAST_PTR(union acpi_operand_object, | |
163 | op->common.node); | |
152c300d BM |
164 | |
165 | status = | |
166 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR | |
167 | (struct | |
168 | acpi_namespace_node, | |
169 | &obj_desc), | |
170 | walk_state); | |
171 | if (ACPI_FAILURE(status)) { | |
172 | return_ACPI_STATUS(status); | |
173 | } | |
174 | ||
175 | switch (op->common.node->type) { | |
176 | /* | |
177 | * For these types, we need the actual node, not the subobject. | |
9e41d93c BM |
178 | * However, the subobject did not get an extra reference count above. |
179 | * | |
180 | * TBD: should ex_resolve_node_to_value be changed to fix this? | |
181 | */ | |
182 | case ACPI_TYPE_DEVICE: | |
183 | case ACPI_TYPE_THERMAL: | |
184 | ||
185 | acpi_ut_add_reference(op->common.node->object); | |
186 | ||
187 | /*lint -fallthrough */ | |
188 | /* | |
189 | * For these types, we need the actual node, not the subobject. | |
190 | * The subobject got an extra reference count in ex_resolve_node_to_value. | |
152c300d BM |
191 | */ |
192 | case ACPI_TYPE_MUTEX: | |
193 | case ACPI_TYPE_METHOD: | |
194 | case ACPI_TYPE_POWER: | |
195 | case ACPI_TYPE_PROCESSOR: | |
196 | case ACPI_TYPE_EVENT: | |
197 | case ACPI_TYPE_REGION: | |
152c300d | 198 | |
9e41d93c | 199 | /* We will create a reference object for these types below */ |
152c300d BM |
200 | break; |
201 | ||
202 | default: | |
9e41d93c BM |
203 | /* |
204 | * All other types - the node was resolved to an actual | |
205 | * object, we are done. | |
206 | */ | |
152c300d BM |
207 | goto exit; |
208 | } | |
209 | } | |
1da177e4 LT |
210 | } |
211 | ||
defba1d8 | 212 | /* Create and init a new internal ACPI object */ |
1da177e4 | 213 | |
4be44fcd LB |
214 | obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info |
215 | (op->common.aml_opcode))-> | |
216 | object_type); | |
1da177e4 | 217 | if (!obj_desc) { |
4be44fcd | 218 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
219 | } |
220 | ||
4be44fcd LB |
221 | status = |
222 | acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode, | |
223 | &obj_desc); | |
224 | if (ACPI_FAILURE(status)) { | |
225 | acpi_ut_remove_reference(obj_desc); | |
226 | return_ACPI_STATUS(status); | |
1da177e4 LT |
227 | } |
228 | ||
152c300d | 229 | exit: |
1da177e4 | 230 | *obj_desc_ptr = obj_desc; |
9e41d93c | 231 | return_ACPI_STATUS(status); |
1da177e4 LT |
232 | } |
233 | ||
44f6c012 | 234 | /******************************************************************************* |
1da177e4 LT |
235 | * |
236 | * FUNCTION: acpi_ds_build_internal_buffer_obj | |
237 | * | |
238 | * PARAMETERS: walk_state - Current walk state | |
239 | * Op - Parser object to be translated | |
240 | * buffer_length - Length of the buffer | |
241 | * obj_desc_ptr - Where the ACPI internal object is returned | |
242 | * | |
243 | * RETURN: Status | |
244 | * | |
245 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
246 | * namespace object | |
247 | * | |
44f6c012 | 248 | ******************************************************************************/ |
1da177e4 LT |
249 | |
250 | acpi_status | |
4be44fcd LB |
251 | acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state, |
252 | union acpi_parse_object *op, | |
253 | u32 buffer_length, | |
254 | union acpi_operand_object **obj_desc_ptr) | |
1da177e4 | 255 | { |
4be44fcd LB |
256 | union acpi_parse_object *arg; |
257 | union acpi_operand_object *obj_desc; | |
258 | union acpi_parse_object *byte_list; | |
259 | u32 byte_list_length = 0; | |
1da177e4 | 260 | |
b229cf92 | 261 | ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj); |
1da177e4 | 262 | |
defba1d8 BM |
263 | /* |
264 | * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". | |
265 | * The buffer object already exists (from the NS node), otherwise it must | |
266 | * be created. | |
267 | */ | |
1da177e4 | 268 | obj_desc = *obj_desc_ptr; |
defba1d8 | 269 | if (!obj_desc) { |
52fc0b02 | 270 | |
1da177e4 LT |
271 | /* Create a new buffer object */ |
272 | ||
4be44fcd | 273 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
1da177e4 LT |
274 | *obj_desc_ptr = obj_desc; |
275 | if (!obj_desc) { | |
4be44fcd | 276 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
277 | } |
278 | } | |
279 | ||
280 | /* | |
281 | * Second arg is the buffer data (optional) byte_list can be either | |
282 | * individual bytes or a string initializer. In either case, a | |
283 | * byte_list appears in the AML. | |
284 | */ | |
4be44fcd | 285 | arg = op->common.value.arg; /* skip first arg */ |
1da177e4 LT |
286 | |
287 | byte_list = arg->named.next; | |
288 | if (byte_list) { | |
289 | if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) { | |
b8e4d893 BM |
290 | ACPI_ERROR((AE_INFO, |
291 | "Expecting bytelist, got AML opcode %X in op %p", | |
292 | byte_list->common.aml_opcode, byte_list)); | |
1da177e4 | 293 | |
4be44fcd | 294 | acpi_ut_remove_reference(obj_desc); |
1da177e4 LT |
295 | return (AE_TYPE); |
296 | } | |
297 | ||
298 | byte_list_length = (u32) byte_list->common.value.integer; | |
299 | } | |
300 | ||
301 | /* | |
302 | * The buffer length (number of bytes) will be the larger of: | |
303 | * 1) The specified buffer length and | |
304 | * 2) The length of the initializer byte list | |
305 | */ | |
306 | obj_desc->buffer.length = buffer_length; | |
307 | if (byte_list_length > buffer_length) { | |
308 | obj_desc->buffer.length = byte_list_length; | |
309 | } | |
310 | ||
311 | /* Allocate the buffer */ | |
312 | ||
313 | if (obj_desc->buffer.length == 0) { | |
314 | obj_desc->buffer.pointer = NULL; | |
4be44fcd LB |
315 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
316 | "Buffer defined with zero length in AML, creating\n")); | |
317 | } else { | |
318 | obj_desc->buffer.pointer = | |
8313524a | 319 | ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length); |
1da177e4 | 320 | if (!obj_desc->buffer.pointer) { |
4be44fcd LB |
321 | acpi_ut_delete_object_desc(obj_desc); |
322 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
323 | } |
324 | ||
325 | /* Initialize buffer from the byte_list (if present) */ | |
326 | ||
327 | if (byte_list) { | |
4be44fcd LB |
328 | ACPI_MEMCPY(obj_desc->buffer.pointer, |
329 | byte_list->named.data, byte_list_length); | |
1da177e4 LT |
330 | } |
331 | } | |
332 | ||
333 | obj_desc->buffer.flags |= AOPOBJ_DATA_VALID; | |
8f9337c8 | 334 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 335 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
336 | } |
337 | ||
44f6c012 | 338 | /******************************************************************************* |
1da177e4 LT |
339 | * |
340 | * FUNCTION: acpi_ds_build_internal_package_obj | |
341 | * | |
342 | * PARAMETERS: walk_state - Current walk state | |
343 | * Op - Parser object to be translated | |
8f9337c8 BM |
344 | * element_count - Number of elements in the package - this is |
345 | * the num_elements argument to Package() | |
1da177e4 LT |
346 | * obj_desc_ptr - Where the ACPI internal object is returned |
347 | * | |
348 | * RETURN: Status | |
349 | * | |
350 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
351 | * namespace object | |
352 | * | |
8f9337c8 BM |
353 | * NOTE: The number of elements in the package will be always be the num_elements |
354 | * count, regardless of the number of elements in the package list. If | |
355 | * num_elements is smaller, only that many package list elements are used. | |
356 | * if num_elements is larger, the Package object is padded out with | |
357 | * objects of type Uninitialized (as per ACPI spec.) | |
358 | * | |
359 | * Even though the ASL compilers do not allow num_elements to be smaller | |
360 | * than the Package list length (for the fixed length package opcode), some | |
361 | * BIOS code modifies the AML on the fly to adjust the num_elements, and | |
362 | * this code compensates for that. This also provides compatibility with | |
363 | * other AML interpreters. | |
364 | * | |
44f6c012 | 365 | ******************************************************************************/ |
1da177e4 LT |
366 | |
367 | acpi_status | |
4be44fcd LB |
368 | acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, |
369 | union acpi_parse_object *op, | |
8f9337c8 | 370 | u32 element_count, |
4be44fcd | 371 | union acpi_operand_object **obj_desc_ptr) |
1da177e4 | 372 | { |
4be44fcd LB |
373 | union acpi_parse_object *arg; |
374 | union acpi_parse_object *parent; | |
375 | union acpi_operand_object *obj_desc = NULL; | |
4be44fcd | 376 | acpi_status status = AE_OK; |
0ba7d25c | 377 | unsigned i; |
91d02132 BM |
378 | u16 index; |
379 | u16 reference_count; | |
1da177e4 | 380 | |
b229cf92 | 381 | ACPI_FUNCTION_TRACE(ds_build_internal_package_obj); |
1da177e4 LT |
382 | |
383 | /* Find the parent of a possibly nested package */ | |
384 | ||
385 | parent = op->common.parent; | |
4be44fcd LB |
386 | while ((parent->common.aml_opcode == AML_PACKAGE_OP) || |
387 | (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { | |
1da177e4 LT |
388 | parent = parent->common.parent; |
389 | } | |
390 | ||
defba1d8 BM |
391 | /* |
392 | * If we are evaluating a Named package object "Name (xxxx, Package)", | |
393 | * the package object already exists, otherwise it must be created. | |
394 | */ | |
1da177e4 | 395 | obj_desc = *obj_desc_ptr; |
defba1d8 | 396 | if (!obj_desc) { |
4be44fcd | 397 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE); |
1da177e4 LT |
398 | *obj_desc_ptr = obj_desc; |
399 | if (!obj_desc) { | |
4be44fcd | 400 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
401 | } |
402 | ||
403 | obj_desc->package.node = parent->common.node; | |
404 | } | |
405 | ||
1da177e4 | 406 | /* |
8f9337c8 BM |
407 | * Allocate the element array (array of pointers to the individual |
408 | * objects) based on the num_elements parameter. Add an extra pointer slot | |
409 | * so that the list is always null terminated. | |
1da177e4 | 410 | */ |
8313524a | 411 | obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) |
8f9337c8 | 412 | element_count + |
8313524a | 413 | 1) * sizeof(void *)); |
1da177e4 LT |
414 | |
415 | if (!obj_desc->package.elements) { | |
4be44fcd LB |
416 | acpi_ut_delete_object_desc(obj_desc); |
417 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
418 | } |
419 | ||
8f9337c8 BM |
420 | obj_desc->package.count = element_count; |
421 | ||
1da177e4 | 422 | /* |
8f9337c8 BM |
423 | * Initialize the elements of the package, up to the num_elements count. |
424 | * Package is automatically padded with uninitialized (NULL) elements | |
425 | * if num_elements is greater than the package list length. Likewise, | |
426 | * Package is truncated if num_elements is less than the list length. | |
1da177e4 | 427 | */ |
1da177e4 LT |
428 | arg = op->common.value.arg; |
429 | arg = arg->common.next; | |
8f9337c8 | 430 | for (i = 0; arg && (i < element_count); i++) { |
1da177e4 | 431 | if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { |
152c300d BM |
432 | if (arg->common.node->type == ACPI_TYPE_METHOD) { |
433 | /* | |
434 | * A method reference "looks" to the parser to be a method | |
435 | * invocation, so we special case it here | |
436 | */ | |
437 | arg->common.aml_opcode = AML_INT_NAMEPATH_OP; | |
438 | status = | |
439 | acpi_ds_build_internal_object(walk_state, | |
440 | arg, | |
441 | &obj_desc-> | |
442 | package. | |
443 | elements[i]); | |
444 | } else { | |
445 | /* This package element is already built, just get it */ | |
446 | ||
447 | obj_desc->package.elements[i] = | |
448 | ACPI_CAST_PTR(union acpi_operand_object, | |
449 | arg->common.node); | |
450 | } | |
4be44fcd LB |
451 | } else { |
452 | status = acpi_ds_build_internal_object(walk_state, arg, | |
453 | &obj_desc-> | |
454 | package. | |
455 | elements[i]); | |
1da177e4 | 456 | } |
91d02132 BM |
457 | |
458 | if (*obj_desc_ptr) { | |
459 | ||
460 | /* Existing package, get existing reference count */ | |
461 | ||
462 | reference_count = | |
463 | (*obj_desc_ptr)->common.reference_count; | |
464 | if (reference_count > 1) { | |
465 | ||
466 | /* Make new element ref count match original ref count */ | |
467 | ||
468 | for (index = 0; index < (reference_count - 1); | |
469 | index++) { | |
470 | acpi_ut_add_reference((obj_desc-> | |
471 | package. | |
472 | elements[i])); | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
1da177e4 LT |
477 | arg = arg->common.next; |
478 | } | |
479 | ||
0ba7d25c BM |
480 | /* Check for match between num_elements and actual length of package_list */ |
481 | ||
482 | if (arg) { | |
483 | /* | |
484 | * num_elements was exhausted, but there are remaining elements in the | |
e3fe0913 | 485 | * package_list. Truncate the package to num_elements. |
0ba7d25c BM |
486 | * |
487 | * Note: technically, this is an error, from ACPI spec: "It is an error | |
488 | * for NumElements to be less than the number of elements in the | |
e3fe0913 BM |
489 | * PackageList". However, we just print an error message and |
490 | * no exception is returned. This provides Windows compatibility. Some | |
491 | * BIOSs will alter the num_elements on the fly, creating this type | |
492 | * of ill-formed package object. | |
0ba7d25c BM |
493 | */ |
494 | while (arg) { | |
e3fe0913 BM |
495 | /* |
496 | * We must delete any package elements that were created earlier | |
497 | * and are not going to be used because of the package truncation. | |
498 | */ | |
499 | if (arg->common.node) { | |
500 | acpi_ut_remove_reference(ACPI_CAST_PTR | |
501 | (union | |
502 | acpi_operand_object, | |
503 | arg->common.node)); | |
504 | arg->common.node = NULL; | |
505 | } | |
0ba7d25c BM |
506 | |
507 | /* Find out how many elements there really are */ | |
508 | ||
509 | i++; | |
510 | arg = arg->common.next; | |
511 | } | |
512 | ||
1371c893 | 513 | ACPI_WARNING((AE_INFO, |
e3fe0913 | 514 | "Package List length (0x%X) larger than NumElements count (0x%X), truncated\n", |
0ba7d25c BM |
515 | i, element_count)); |
516 | } else if (i < element_count) { | |
517 | /* | |
518 | * Arg list (elements) was exhausted, but we did not reach num_elements count. | |
519 | * Note: this is not an error, the package is padded out with NULLs. | |
520 | */ | |
8f9337c8 | 521 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
e3fe0913 | 522 | "Package List length (0x%X) smaller than NumElements count (0x%X), padded with null elements\n", |
0ba7d25c | 523 | i, element_count)); |
8f9337c8 BM |
524 | } |
525 | ||
1da177e4 | 526 | obj_desc->package.flags |= AOPOBJ_DATA_VALID; |
8f9337c8 | 527 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 528 | return_ACPI_STATUS(status); |
1da177e4 LT |
529 | } |
530 | ||
44f6c012 | 531 | /******************************************************************************* |
1da177e4 LT |
532 | * |
533 | * FUNCTION: acpi_ds_create_node | |
534 | * | |
535 | * PARAMETERS: walk_state - Current walk state | |
536 | * Node - NS Node to be initialized | |
537 | * Op - Parser object to be translated | |
538 | * | |
539 | * RETURN: Status | |
540 | * | |
541 | * DESCRIPTION: Create the object to be associated with a namespace node | |
542 | * | |
44f6c012 | 543 | ******************************************************************************/ |
1da177e4 LT |
544 | |
545 | acpi_status | |
4be44fcd LB |
546 | acpi_ds_create_node(struct acpi_walk_state *walk_state, |
547 | struct acpi_namespace_node *node, | |
548 | union acpi_parse_object *op) | |
1da177e4 | 549 | { |
4be44fcd LB |
550 | acpi_status status; |
551 | union acpi_operand_object *obj_desc; | |
1da177e4 | 552 | |
b229cf92 | 553 | ACPI_FUNCTION_TRACE_PTR(ds_create_node, op); |
1da177e4 LT |
554 | |
555 | /* | |
556 | * Because of the execution pass through the non-control-method | |
557 | * parts of the table, we can arrive here twice. Only init | |
558 | * the named object node the first time through | |
559 | */ | |
4be44fcd LB |
560 | if (acpi_ns_get_attached_object(node)) { |
561 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
562 | } |
563 | ||
564 | if (!op->common.value.arg) { | |
52fc0b02 | 565 | |
1da177e4 LT |
566 | /* No arguments, there is nothing to do */ |
567 | ||
4be44fcd | 568 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
569 | } |
570 | ||
571 | /* Build an internal object for the argument(s) */ | |
572 | ||
4be44fcd LB |
573 | status = acpi_ds_build_internal_object(walk_state, op->common.value.arg, |
574 | &obj_desc); | |
575 | if (ACPI_FAILURE(status)) { | |
576 | return_ACPI_STATUS(status); | |
1da177e4 LT |
577 | } |
578 | ||
579 | /* Re-type the object according to its argument */ | |
580 | ||
3371c19c | 581 | node->type = obj_desc->common.type; |
1da177e4 LT |
582 | |
583 | /* Attach obj to node */ | |
584 | ||
4be44fcd | 585 | status = acpi_ns_attach_object(node, obj_desc, node->type); |
1da177e4 LT |
586 | |
587 | /* Remove local reference to the object */ | |
588 | ||
4be44fcd LB |
589 | acpi_ut_remove_reference(obj_desc); |
590 | return_ACPI_STATUS(status); | |
1da177e4 LT |
591 | } |
592 | ||
4be44fcd | 593 | #endif /* ACPI_NO_METHOD_EXECUTION */ |
1da177e4 | 594 | |
44f6c012 | 595 | /******************************************************************************* |
1da177e4 LT |
596 | * |
597 | * FUNCTION: acpi_ds_init_object_from_op | |
598 | * | |
599 | * PARAMETERS: walk_state - Current walk state | |
600 | * Op - Parser op used to init the internal object | |
601 | * Opcode - AML opcode associated with the object | |
602 | * ret_obj_desc - Namespace object to be initialized | |
603 | * | |
604 | * RETURN: Status | |
605 | * | |
606 | * DESCRIPTION: Initialize a namespace object from a parser Op and its | |
607 | * associated arguments. The namespace object is a more compact | |
608 | * representation of the Op and its arguments. | |
609 | * | |
44f6c012 | 610 | ******************************************************************************/ |
1da177e4 LT |
611 | |
612 | acpi_status | |
4be44fcd LB |
613 | acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, |
614 | union acpi_parse_object *op, | |
615 | u16 opcode, | |
616 | union acpi_operand_object **ret_obj_desc) | |
1da177e4 | 617 | { |
4be44fcd LB |
618 | const struct acpi_opcode_info *op_info; |
619 | union acpi_operand_object *obj_desc; | |
620 | acpi_status status = AE_OK; | |
1da177e4 | 621 | |
b229cf92 | 622 | ACPI_FUNCTION_TRACE(ds_init_object_from_op); |
1da177e4 LT |
623 | |
624 | obj_desc = *ret_obj_desc; | |
4be44fcd | 625 | op_info = acpi_ps_get_opcode_info(opcode); |
1da177e4 | 626 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 627 | |
1da177e4 LT |
628 | /* Unknown opcode */ |
629 | ||
4be44fcd | 630 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
631 | } |
632 | ||
633 | /* Perform per-object initialization */ | |
634 | ||
3371c19c | 635 | switch (obj_desc->common.type) { |
1da177e4 LT |
636 | case ACPI_TYPE_BUFFER: |
637 | ||
638 | /* | |
639 | * Defer evaluation of Buffer term_arg operand | |
640 | */ | |
8f9337c8 BM |
641 | obj_desc->buffer.node = |
642 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
643 | walk_state->operands[0]); | |
1da177e4 LT |
644 | obj_desc->buffer.aml_start = op->named.data; |
645 | obj_desc->buffer.aml_length = op->named.length; | |
646 | break; | |
647 | ||
1da177e4 LT |
648 | case ACPI_TYPE_PACKAGE: |
649 | ||
650 | /* | |
651 | * Defer evaluation of Package term_arg operand | |
652 | */ | |
8f9337c8 BM |
653 | obj_desc->package.node = |
654 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
655 | walk_state->operands[0]); | |
1da177e4 LT |
656 | obj_desc->package.aml_start = op->named.data; |
657 | obj_desc->package.aml_length = op->named.length; | |
658 | break; | |
659 | ||
1da177e4 LT |
660 | case ACPI_TYPE_INTEGER: |
661 | ||
662 | switch (op_info->type) { | |
663 | case AML_TYPE_CONSTANT: | |
664 | /* | |
665 | * Resolve AML Constants here - AND ONLY HERE! | |
666 | * All constants are integers. | |
44f6c012 RM |
667 | * We mark the integer with a flag that indicates that it started |
668 | * life as a constant -- so that stores to constants will perform | |
669 | * as expected (noop). zero_op is used as a placeholder for optional | |
670 | * target operands. | |
1da177e4 LT |
671 | */ |
672 | obj_desc->common.flags = AOPOBJ_AML_CONSTANT; | |
673 | ||
674 | switch (opcode) { | |
675 | case AML_ZERO_OP: | |
676 | ||
677 | obj_desc->integer.value = 0; | |
678 | break; | |
679 | ||
680 | case AML_ONE_OP: | |
681 | ||
682 | obj_desc->integer.value = 1; | |
683 | break; | |
684 | ||
685 | case AML_ONES_OP: | |
686 | ||
687 | obj_desc->integer.value = ACPI_INTEGER_MAX; | |
688 | ||
689 | /* Truncate value if we are executing from a 32-bit ACPI table */ | |
690 | ||
691 | #ifndef ACPI_NO_METHOD_EXECUTION | |
4be44fcd | 692 | acpi_ex_truncate_for32bit_table(obj_desc); |
1da177e4 LT |
693 | #endif |
694 | break; | |
695 | ||
696 | case AML_REVISION_OP: | |
697 | ||
698 | obj_desc->integer.value = ACPI_CA_VERSION; | |
699 | break; | |
700 | ||
701 | default: | |
702 | ||
b8e4d893 BM |
703 | ACPI_ERROR((AE_INFO, |
704 | "Unknown constant opcode %X", | |
705 | opcode)); | |
1da177e4 LT |
706 | status = AE_AML_OPERAND_TYPE; |
707 | break; | |
708 | } | |
709 | break; | |
710 | ||
1da177e4 LT |
711 | case AML_TYPE_LITERAL: |
712 | ||
713 | obj_desc->integer.value = op->common.value.integer; | |
6f42ccf2 | 714 | #ifndef ACPI_NO_METHOD_EXECUTION |
4be44fcd | 715 | acpi_ex_truncate_for32bit_table(obj_desc); |
6f42ccf2 | 716 | #endif |
1da177e4 LT |
717 | break; |
718 | ||
1da177e4 | 719 | default: |
b8e4d893 BM |
720 | ACPI_ERROR((AE_INFO, "Unknown Integer type %X", |
721 | op_info->type)); | |
1da177e4 LT |
722 | status = AE_AML_OPERAND_TYPE; |
723 | break; | |
724 | } | |
725 | break; | |
726 | ||
1da177e4 LT |
727 | case ACPI_TYPE_STRING: |
728 | ||
729 | obj_desc->string.pointer = op->common.value.string; | |
4be44fcd LB |
730 | obj_desc->string.length = |
731 | (u32) ACPI_STRLEN(op->common.value.string); | |
1da177e4 LT |
732 | |
733 | /* | |
734 | * The string is contained in the ACPI table, don't ever try | |
735 | * to delete it | |
736 | */ | |
737 | obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; | |
738 | break; | |
739 | ||
1da177e4 LT |
740 | case ACPI_TYPE_METHOD: |
741 | break; | |
742 | ||
1da177e4 LT |
743 | case ACPI_TYPE_LOCAL_REFERENCE: |
744 | ||
745 | switch (op_info->type) { | |
746 | case AML_TYPE_LOCAL_VARIABLE: | |
747 | ||
1044f1f6 | 748 | /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */ |
1da177e4 | 749 | |
ba9c3f55 BM |
750 | obj_desc->reference.value = |
751 | ((u32)opcode) - AML_LOCAL_OP; | |
1044f1f6 | 752 | obj_desc->reference.class = ACPI_REFCLASS_LOCAL; |
1da177e4 LT |
753 | |
754 | #ifndef ACPI_NO_METHOD_EXECUTION | |
1044f1f6 BM |
755 | status = |
756 | acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL, | |
757 | obj_desc->reference. | |
758 | value, walk_state, | |
759 | ACPI_CAST_INDIRECT_PTR | |
760 | (struct | |
761 | acpi_namespace_node, | |
762 | &obj_desc->reference. | |
763 | object)); | |
1da177e4 LT |
764 | #endif |
765 | break; | |
766 | ||
1da177e4 LT |
767 | case AML_TYPE_METHOD_ARGUMENT: |
768 | ||
1044f1f6 | 769 | /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */ |
1da177e4 | 770 | |
ba9c3f55 | 771 | obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP; |
1044f1f6 | 772 | obj_desc->reference.class = ACPI_REFCLASS_ARG; |
1da177e4 LT |
773 | |
774 | #ifndef ACPI_NO_METHOD_EXECUTION | |
1044f1f6 | 775 | status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG, |
4be44fcd | 776 | obj_desc-> |
1044f1f6 | 777 | reference.value, |
4be44fcd | 778 | walk_state, |
57e664cf | 779 | ACPI_CAST_INDIRECT_PTR |
4be44fcd | 780 | (struct |
57e664cf BM |
781 | acpi_namespace_node, |
782 | &obj_desc-> | |
783 | reference. | |
784 | object)); | |
1da177e4 LT |
785 | #endif |
786 | break; | |
787 | ||
1044f1f6 | 788 | default: /* Object name or Debug object */ |
1da177e4 | 789 | |
1044f1f6 BM |
790 | switch (op->common.aml_opcode) { |
791 | case AML_INT_NAMEPATH_OP: | |
52fc0b02 | 792 | |
1da177e4 LT |
793 | /* Node was saved in Op */ |
794 | ||
795 | obj_desc->reference.node = op->common.node; | |
9e41d93c BM |
796 | obj_desc->reference.object = |
797 | op->common.node->object; | |
1044f1f6 BM |
798 | obj_desc->reference.class = ACPI_REFCLASS_NAME; |
799 | break; | |
800 | ||
801 | case AML_DEBUG_OP: | |
1da177e4 | 802 | |
1044f1f6 BM |
803 | obj_desc->reference.class = ACPI_REFCLASS_DEBUG; |
804 | break; | |
805 | ||
806 | default: | |
807 | ||
808 | ACPI_ERROR((AE_INFO, | |
809 | "Unimplemented reference type for AML opcode: %4.4X", | |
810 | opcode)); | |
811 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
812 | } | |
1da177e4 LT |
813 | break; |
814 | } | |
815 | break; | |
816 | ||
1da177e4 LT |
817 | default: |
818 | ||
b8e4d893 | 819 | ACPI_ERROR((AE_INFO, "Unimplemented data type: %X", |
3371c19c | 820 | obj_desc->common.type)); |
1da177e4 LT |
821 | |
822 | status = AE_AML_OPERAND_TYPE; | |
823 | break; | |
824 | } | |
825 | ||
4be44fcd | 826 | return_ACPI_STATUS(status); |
1da177e4 | 827 | } |