Commit | Line | Data |
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1da177e4 LT |
1 | /****************************************************************************** |
2 | * | |
3 | * Module Name: dsobject - Dispatcher object management routines | |
4 | * | |
5 | *****************************************************************************/ | |
6 | ||
7 | /* | |
77848130 | 8 | * Copyright (C) 2000 - 2012, 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 | |
ba494bee | 67 | * op - Parser object to be translated |
1da177e4 LT |
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; | |
09079250 | 84 | acpi_object_type type; |
1da177e4 | 85 | |
b229cf92 | 86 | ACPI_FUNCTION_TRACE(ds_build_internal_object); |
1da177e4 LT |
87 | |
88 | *obj_desc_ptr = NULL; | |
89 | if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { | |
90 | /* | |
defba1d8 | 91 | * This is a named object reference. If this name was |
1da177e4 LT |
92 | * previously looked up in the namespace, it was stored in this op. |
93 | * Otherwise, go ahead and look it up now | |
94 | */ | |
95 | if (!op->common.node) { | |
4be44fcd LB |
96 | status = acpi_ns_lookup(walk_state->scope_info, |
97 | op->common.value.string, | |
98 | ACPI_TYPE_ANY, | |
99 | ACPI_IMODE_EXECUTE, | |
100 | ACPI_NS_SEARCH_PARENT | | |
101 | ACPI_NS_DONT_OPEN_SCOPE, NULL, | |
defba1d8 BM |
102 | ACPI_CAST_INDIRECT_PTR(struct |
103 | acpi_namespace_node, | |
104 | &(op-> | |
105 | common. | |
106 | node))); | |
4be44fcd | 107 | if (ACPI_FAILURE(status)) { |
52fc0b02 | 108 | |
defba1d8 BM |
109 | /* Check if we are resolving a named reference within a package */ |
110 | ||
111 | if ((status == AE_NOT_FOUND) | |
112 | && (acpi_gbl_enable_interpreter_slack) | |
113 | && | |
114 | ((op->common.parent->common.aml_opcode == | |
115 | AML_PACKAGE_OP) | |
116 | || (op->common.parent->common.aml_opcode == | |
117 | AML_VAR_PACKAGE_OP))) { | |
118 | /* | |
119 | * We didn't find the target and we are populating elements | |
120 | * of a package - ignore if slack enabled. Some ASL code | |
121 | * contains dangling invalid references in packages and | |
122 | * expects that no exception will be issued. Leave the | |
123 | * element as a null element. It cannot be used, but it | |
124 | * can be overwritten by subsequent ASL code - this is | |
125 | * typically the case. | |
126 | */ | |
127 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
128 | "Ignoring unresolved reference in package [%4.4s]\n", | |
129 | walk_state-> | |
130 | scope_info->scope. | |
131 | node->name.ascii)); | |
132 | ||
133 | return_ACPI_STATUS(AE_OK); | |
134 | } else { | |
b8e4d893 BM |
135 | ACPI_ERROR_NAMESPACE(op->common.value. |
136 | string, status); | |
defba1d8 BM |
137 | } |
138 | ||
4be44fcd | 139 | return_ACPI_STATUS(status); |
1da177e4 LT |
140 | } |
141 | } | |
152c300d BM |
142 | |
143 | /* Special object resolution for elements of a package */ | |
144 | ||
145 | if ((op->common.parent->common.aml_opcode == AML_PACKAGE_OP) || | |
146 | (op->common.parent->common.aml_opcode == | |
147 | AML_VAR_PACKAGE_OP)) { | |
148 | /* | |
149 | * Attempt to resolve the node to a value before we insert it into | |
150 | * the package. If this is a reference to a common data type, | |
151 | * resolve it immediately. According to the ACPI spec, package | |
152 | * elements can only be "data objects" or method references. | |
153 | * Attempt to resolve to an Integer, Buffer, String or Package. | |
154 | * If cannot, return the named reference (for things like Devices, | |
155 | * Methods, etc.) Buffer Fields and Fields will resolve to simple | |
156 | * objects (int/buf/str/pkg). | |
157 | * | |
158 | * NOTE: References to things like Devices, Methods, Mutexes, etc. | |
159 | * will remain as named references. This behavior is not described | |
160 | * in the ACPI spec, but it appears to be an oversight. | |
161 | */ | |
b7f9f042 BM |
162 | obj_desc = |
163 | ACPI_CAST_PTR(union acpi_operand_object, | |
164 | op->common.node); | |
152c300d BM |
165 | |
166 | status = | |
167 | acpi_ex_resolve_node_to_value(ACPI_CAST_INDIRECT_PTR | |
168 | (struct | |
169 | acpi_namespace_node, | |
170 | &obj_desc), | |
171 | walk_state); | |
172 | if (ACPI_FAILURE(status)) { | |
173 | return_ACPI_STATUS(status); | |
174 | } | |
175 | ||
09079250 BM |
176 | /* |
177 | * Special handling for Alias objects. We need to setup the type | |
178 | * and the Op->Common.Node to point to the Alias target. Note, | |
179 | * Alias has at most one level of indirection internally. | |
180 | */ | |
181 | type = op->common.node->type; | |
182 | if (type == ACPI_TYPE_LOCAL_ALIAS) { | |
183 | type = obj_desc->common.type; | |
184 | op->common.node = | |
185 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
186 | op->common.node->object); | |
187 | } | |
188 | ||
189 | switch (type) { | |
152c300d BM |
190 | /* |
191 | * For these types, we need the actual node, not the subobject. | |
9e41d93c BM |
192 | * However, the subobject did not get an extra reference count above. |
193 | * | |
194 | * TBD: should ex_resolve_node_to_value be changed to fix this? | |
195 | */ | |
196 | case ACPI_TYPE_DEVICE: | |
197 | case ACPI_TYPE_THERMAL: | |
198 | ||
199 | acpi_ut_add_reference(op->common.node->object); | |
200 | ||
201 | /*lint -fallthrough */ | |
202 | /* | |
203 | * For these types, we need the actual node, not the subobject. | |
204 | * The subobject got an extra reference count in ex_resolve_node_to_value. | |
152c300d BM |
205 | */ |
206 | case ACPI_TYPE_MUTEX: | |
207 | case ACPI_TYPE_METHOD: | |
208 | case ACPI_TYPE_POWER: | |
209 | case ACPI_TYPE_PROCESSOR: | |
210 | case ACPI_TYPE_EVENT: | |
211 | case ACPI_TYPE_REGION: | |
152c300d | 212 | |
9e41d93c | 213 | /* We will create a reference object for these types below */ |
152c300d BM |
214 | break; |
215 | ||
216 | default: | |
9e41d93c BM |
217 | /* |
218 | * All other types - the node was resolved to an actual | |
219 | * object, we are done. | |
220 | */ | |
152c300d BM |
221 | goto exit; |
222 | } | |
223 | } | |
1da177e4 LT |
224 | } |
225 | ||
defba1d8 | 226 | /* Create and init a new internal ACPI object */ |
1da177e4 | 227 | |
4be44fcd LB |
228 | obj_desc = acpi_ut_create_internal_object((acpi_ps_get_opcode_info |
229 | (op->common.aml_opcode))-> | |
230 | object_type); | |
1da177e4 | 231 | if (!obj_desc) { |
4be44fcd | 232 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
233 | } |
234 | ||
4be44fcd LB |
235 | status = |
236 | acpi_ds_init_object_from_op(walk_state, op, op->common.aml_opcode, | |
237 | &obj_desc); | |
238 | if (ACPI_FAILURE(status)) { | |
239 | acpi_ut_remove_reference(obj_desc); | |
240 | return_ACPI_STATUS(status); | |
1da177e4 LT |
241 | } |
242 | ||
152c300d | 243 | exit: |
1da177e4 | 244 | *obj_desc_ptr = obj_desc; |
9e41d93c | 245 | return_ACPI_STATUS(status); |
1da177e4 LT |
246 | } |
247 | ||
44f6c012 | 248 | /******************************************************************************* |
1da177e4 LT |
249 | * |
250 | * FUNCTION: acpi_ds_build_internal_buffer_obj | |
251 | * | |
252 | * PARAMETERS: walk_state - Current walk state | |
ba494bee | 253 | * op - Parser object to be translated |
1da177e4 LT |
254 | * buffer_length - Length of the buffer |
255 | * obj_desc_ptr - Where the ACPI internal object is returned | |
256 | * | |
257 | * RETURN: Status | |
258 | * | |
259 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
260 | * namespace object | |
261 | * | |
44f6c012 | 262 | ******************************************************************************/ |
1da177e4 LT |
263 | |
264 | acpi_status | |
4be44fcd LB |
265 | acpi_ds_build_internal_buffer_obj(struct acpi_walk_state *walk_state, |
266 | union acpi_parse_object *op, | |
267 | u32 buffer_length, | |
268 | union acpi_operand_object **obj_desc_ptr) | |
1da177e4 | 269 | { |
4be44fcd LB |
270 | union acpi_parse_object *arg; |
271 | union acpi_operand_object *obj_desc; | |
272 | union acpi_parse_object *byte_list; | |
273 | u32 byte_list_length = 0; | |
1da177e4 | 274 | |
b229cf92 | 275 | ACPI_FUNCTION_TRACE(ds_build_internal_buffer_obj); |
1da177e4 | 276 | |
defba1d8 BM |
277 | /* |
278 | * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". | |
279 | * The buffer object already exists (from the NS node), otherwise it must | |
280 | * be created. | |
281 | */ | |
1da177e4 | 282 | obj_desc = *obj_desc_ptr; |
defba1d8 | 283 | if (!obj_desc) { |
52fc0b02 | 284 | |
1da177e4 LT |
285 | /* Create a new buffer object */ |
286 | ||
4be44fcd | 287 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER); |
1da177e4 LT |
288 | *obj_desc_ptr = obj_desc; |
289 | if (!obj_desc) { | |
4be44fcd | 290 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
291 | } |
292 | } | |
293 | ||
294 | /* | |
295 | * Second arg is the buffer data (optional) byte_list can be either | |
73a3090a | 296 | * individual bytes or a string initializer. In either case, a |
1da177e4 LT |
297 | * byte_list appears in the AML. |
298 | */ | |
4be44fcd | 299 | arg = op->common.value.arg; /* skip first arg */ |
1da177e4 LT |
300 | |
301 | byte_list = arg->named.next; | |
302 | if (byte_list) { | |
303 | if (byte_list->common.aml_opcode != AML_INT_BYTELIST_OP) { | |
b8e4d893 | 304 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 305 | "Expecting bytelist, found AML opcode 0x%X in op %p", |
b8e4d893 | 306 | byte_list->common.aml_opcode, byte_list)); |
1da177e4 | 307 | |
4be44fcd | 308 | acpi_ut_remove_reference(obj_desc); |
1da177e4 LT |
309 | return (AE_TYPE); |
310 | } | |
311 | ||
312 | byte_list_length = (u32) byte_list->common.value.integer; | |
313 | } | |
314 | ||
315 | /* | |
316 | * The buffer length (number of bytes) will be the larger of: | |
317 | * 1) The specified buffer length and | |
318 | * 2) The length of the initializer byte list | |
319 | */ | |
320 | obj_desc->buffer.length = buffer_length; | |
321 | if (byte_list_length > buffer_length) { | |
322 | obj_desc->buffer.length = byte_list_length; | |
323 | } | |
324 | ||
325 | /* Allocate the buffer */ | |
326 | ||
327 | if (obj_desc->buffer.length == 0) { | |
328 | obj_desc->buffer.pointer = NULL; | |
4be44fcd LB |
329 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
330 | "Buffer defined with zero length in AML, creating\n")); | |
331 | } else { | |
332 | obj_desc->buffer.pointer = | |
8313524a | 333 | ACPI_ALLOCATE_ZEROED(obj_desc->buffer.length); |
1da177e4 | 334 | if (!obj_desc->buffer.pointer) { |
4be44fcd LB |
335 | acpi_ut_delete_object_desc(obj_desc); |
336 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
337 | } |
338 | ||
339 | /* Initialize buffer from the byte_list (if present) */ | |
340 | ||
341 | if (byte_list) { | |
4be44fcd LB |
342 | ACPI_MEMCPY(obj_desc->buffer.pointer, |
343 | byte_list->named.data, byte_list_length); | |
1da177e4 LT |
344 | } |
345 | } | |
346 | ||
347 | obj_desc->buffer.flags |= AOPOBJ_DATA_VALID; | |
8f9337c8 | 348 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 349 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
350 | } |
351 | ||
44f6c012 | 352 | /******************************************************************************* |
1da177e4 LT |
353 | * |
354 | * FUNCTION: acpi_ds_build_internal_package_obj | |
355 | * | |
356 | * PARAMETERS: walk_state - Current walk state | |
ba494bee | 357 | * op - Parser object to be translated |
8f9337c8 BM |
358 | * element_count - Number of elements in the package - this is |
359 | * the num_elements argument to Package() | |
1da177e4 LT |
360 | * obj_desc_ptr - Where the ACPI internal object is returned |
361 | * | |
362 | * RETURN: Status | |
363 | * | |
364 | * DESCRIPTION: Translate a parser Op package object to the equivalent | |
365 | * namespace object | |
366 | * | |
8f9337c8 BM |
367 | * NOTE: The number of elements in the package will be always be the num_elements |
368 | * count, regardless of the number of elements in the package list. If | |
369 | * num_elements is smaller, only that many package list elements are used. | |
370 | * if num_elements is larger, the Package object is padded out with | |
371 | * objects of type Uninitialized (as per ACPI spec.) | |
372 | * | |
373 | * Even though the ASL compilers do not allow num_elements to be smaller | |
374 | * than the Package list length (for the fixed length package opcode), some | |
375 | * BIOS code modifies the AML on the fly to adjust the num_elements, and | |
376 | * this code compensates for that. This also provides compatibility with | |
377 | * other AML interpreters. | |
378 | * | |
44f6c012 | 379 | ******************************************************************************/ |
1da177e4 LT |
380 | |
381 | acpi_status | |
4be44fcd LB |
382 | acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state, |
383 | union acpi_parse_object *op, | |
8f9337c8 | 384 | u32 element_count, |
4be44fcd | 385 | union acpi_operand_object **obj_desc_ptr) |
1da177e4 | 386 | { |
4be44fcd LB |
387 | union acpi_parse_object *arg; |
388 | union acpi_parse_object *parent; | |
389 | union acpi_operand_object *obj_desc = NULL; | |
4be44fcd | 390 | acpi_status status = AE_OK; |
0ba7d25c | 391 | unsigned i; |
91d02132 BM |
392 | u16 index; |
393 | u16 reference_count; | |
1da177e4 | 394 | |
b229cf92 | 395 | ACPI_FUNCTION_TRACE(ds_build_internal_package_obj); |
1da177e4 LT |
396 | |
397 | /* Find the parent of a possibly nested package */ | |
398 | ||
399 | parent = op->common.parent; | |
4be44fcd LB |
400 | while ((parent->common.aml_opcode == AML_PACKAGE_OP) || |
401 | (parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) { | |
1da177e4 LT |
402 | parent = parent->common.parent; |
403 | } | |
404 | ||
defba1d8 BM |
405 | /* |
406 | * If we are evaluating a Named package object "Name (xxxx, Package)", | |
407 | * the package object already exists, otherwise it must be created. | |
408 | */ | |
1da177e4 | 409 | obj_desc = *obj_desc_ptr; |
defba1d8 | 410 | if (!obj_desc) { |
4be44fcd | 411 | obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE); |
1da177e4 LT |
412 | *obj_desc_ptr = obj_desc; |
413 | if (!obj_desc) { | |
4be44fcd | 414 | return_ACPI_STATUS(AE_NO_MEMORY); |
1da177e4 LT |
415 | } |
416 | ||
417 | obj_desc->package.node = parent->common.node; | |
418 | } | |
419 | ||
1da177e4 | 420 | /* |
8f9337c8 BM |
421 | * Allocate the element array (array of pointers to the individual |
422 | * objects) based on the num_elements parameter. Add an extra pointer slot | |
423 | * so that the list is always null terminated. | |
1da177e4 | 424 | */ |
8313524a | 425 | obj_desc->package.elements = ACPI_ALLOCATE_ZEROED(((acpi_size) |
8f9337c8 | 426 | element_count + |
8313524a | 427 | 1) * sizeof(void *)); |
1da177e4 LT |
428 | |
429 | if (!obj_desc->package.elements) { | |
4be44fcd LB |
430 | acpi_ut_delete_object_desc(obj_desc); |
431 | return_ACPI_STATUS(AE_NO_MEMORY); | |
1da177e4 LT |
432 | } |
433 | ||
8f9337c8 BM |
434 | obj_desc->package.count = element_count; |
435 | ||
1da177e4 | 436 | /* |
8f9337c8 BM |
437 | * Initialize the elements of the package, up to the num_elements count. |
438 | * Package is automatically padded with uninitialized (NULL) elements | |
439 | * if num_elements is greater than the package list length. Likewise, | |
440 | * Package is truncated if num_elements is less than the list length. | |
1da177e4 | 441 | */ |
1da177e4 LT |
442 | arg = op->common.value.arg; |
443 | arg = arg->common.next; | |
8f9337c8 | 444 | for (i = 0; arg && (i < element_count); i++) { |
1da177e4 | 445 | if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) { |
152c300d BM |
446 | if (arg->common.node->type == ACPI_TYPE_METHOD) { |
447 | /* | |
448 | * A method reference "looks" to the parser to be a method | |
449 | * invocation, so we special case it here | |
450 | */ | |
451 | arg->common.aml_opcode = AML_INT_NAMEPATH_OP; | |
452 | status = | |
453 | acpi_ds_build_internal_object(walk_state, | |
454 | arg, | |
455 | &obj_desc-> | |
456 | package. | |
457 | elements[i]); | |
458 | } else { | |
459 | /* This package element is already built, just get it */ | |
460 | ||
461 | obj_desc->package.elements[i] = | |
462 | ACPI_CAST_PTR(union acpi_operand_object, | |
463 | arg->common.node); | |
464 | } | |
4be44fcd LB |
465 | } else { |
466 | status = acpi_ds_build_internal_object(walk_state, arg, | |
467 | &obj_desc-> | |
468 | package. | |
469 | elements[i]); | |
1da177e4 | 470 | } |
91d02132 BM |
471 | |
472 | if (*obj_desc_ptr) { | |
473 | ||
474 | /* Existing package, get existing reference count */ | |
475 | ||
476 | reference_count = | |
477 | (*obj_desc_ptr)->common.reference_count; | |
478 | if (reference_count > 1) { | |
479 | ||
480 | /* Make new element ref count match original ref count */ | |
481 | ||
482 | for (index = 0; index < (reference_count - 1); | |
483 | index++) { | |
484 | acpi_ut_add_reference((obj_desc-> | |
485 | package. | |
486 | elements[i])); | |
487 | } | |
488 | } | |
489 | } | |
490 | ||
1da177e4 LT |
491 | arg = arg->common.next; |
492 | } | |
493 | ||
0ba7d25c BM |
494 | /* Check for match between num_elements and actual length of package_list */ |
495 | ||
496 | if (arg) { | |
497 | /* | |
498 | * num_elements was exhausted, but there are remaining elements in the | |
e3fe0913 | 499 | * package_list. Truncate the package to num_elements. |
0ba7d25c BM |
500 | * |
501 | * Note: technically, this is an error, from ACPI spec: "It is an error | |
502 | * for NumElements to be less than the number of elements in the | |
7d5d05d0 | 503 | * PackageList". However, we just print a message and |
e3fe0913 BM |
504 | * no exception is returned. This provides Windows compatibility. Some |
505 | * BIOSs will alter the num_elements on the fly, creating this type | |
506 | * of ill-formed package object. | |
0ba7d25c BM |
507 | */ |
508 | while (arg) { | |
e3fe0913 BM |
509 | /* |
510 | * We must delete any package elements that were created earlier | |
511 | * and are not going to be used because of the package truncation. | |
512 | */ | |
513 | if (arg->common.node) { | |
514 | acpi_ut_remove_reference(ACPI_CAST_PTR | |
515 | (union | |
516 | acpi_operand_object, | |
517 | arg->common.node)); | |
518 | arg->common.node = NULL; | |
519 | } | |
0ba7d25c BM |
520 | |
521 | /* Find out how many elements there really are */ | |
522 | ||
523 | i++; | |
524 | arg = arg->common.next; | |
525 | } | |
526 | ||
7d5d05d0 | 527 | ACPI_INFO((AE_INFO, |
f6a22b0b | 528 | "Actual Package length (%u) is larger than NumElements field (%u), truncated\n", |
7d5d05d0 | 529 | i, element_count)); |
0ba7d25c BM |
530 | } else if (i < element_count) { |
531 | /* | |
532 | * Arg list (elements) was exhausted, but we did not reach num_elements count. | |
533 | * Note: this is not an error, the package is padded out with NULLs. | |
534 | */ | |
8f9337c8 | 535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
f6a22b0b | 536 | "Package List length (%u) smaller than NumElements count (%u), padded with null elements\n", |
0ba7d25c | 537 | i, element_count)); |
8f9337c8 BM |
538 | } |
539 | ||
1da177e4 | 540 | obj_desc->package.flags |= AOPOBJ_DATA_VALID; |
8f9337c8 | 541 | op->common.node = ACPI_CAST_PTR(struct acpi_namespace_node, obj_desc); |
4be44fcd | 542 | return_ACPI_STATUS(status); |
1da177e4 LT |
543 | } |
544 | ||
44f6c012 | 545 | /******************************************************************************* |
1da177e4 LT |
546 | * |
547 | * FUNCTION: acpi_ds_create_node | |
548 | * | |
549 | * PARAMETERS: walk_state - Current walk state | |
ba494bee BM |
550 | * node - NS Node to be initialized |
551 | * op - Parser object to be translated | |
1da177e4 LT |
552 | * |
553 | * RETURN: Status | |
554 | * | |
555 | * DESCRIPTION: Create the object to be associated with a namespace node | |
556 | * | |
44f6c012 | 557 | ******************************************************************************/ |
1da177e4 LT |
558 | |
559 | acpi_status | |
4be44fcd LB |
560 | acpi_ds_create_node(struct acpi_walk_state *walk_state, |
561 | struct acpi_namespace_node *node, | |
562 | union acpi_parse_object *op) | |
1da177e4 | 563 | { |
4be44fcd LB |
564 | acpi_status status; |
565 | union acpi_operand_object *obj_desc; | |
1da177e4 | 566 | |
b229cf92 | 567 | ACPI_FUNCTION_TRACE_PTR(ds_create_node, op); |
1da177e4 LT |
568 | |
569 | /* | |
570 | * Because of the execution pass through the non-control-method | |
73a3090a | 571 | * parts of the table, we can arrive here twice. Only init |
1da177e4 LT |
572 | * the named object node the first time through |
573 | */ | |
4be44fcd LB |
574 | if (acpi_ns_get_attached_object(node)) { |
575 | return_ACPI_STATUS(AE_OK); | |
1da177e4 LT |
576 | } |
577 | ||
578 | if (!op->common.value.arg) { | |
52fc0b02 | 579 | |
1da177e4 LT |
580 | /* No arguments, there is nothing to do */ |
581 | ||
4be44fcd | 582 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
583 | } |
584 | ||
585 | /* Build an internal object for the argument(s) */ | |
586 | ||
4be44fcd LB |
587 | status = acpi_ds_build_internal_object(walk_state, op->common.value.arg, |
588 | &obj_desc); | |
589 | if (ACPI_FAILURE(status)) { | |
590 | return_ACPI_STATUS(status); | |
1da177e4 LT |
591 | } |
592 | ||
593 | /* Re-type the object according to its argument */ | |
594 | ||
3371c19c | 595 | node->type = obj_desc->common.type; |
1da177e4 LT |
596 | |
597 | /* Attach obj to node */ | |
598 | ||
4be44fcd | 599 | status = acpi_ns_attach_object(node, obj_desc, node->type); |
1da177e4 LT |
600 | |
601 | /* Remove local reference to the object */ | |
602 | ||
4be44fcd LB |
603 | acpi_ut_remove_reference(obj_desc); |
604 | return_ACPI_STATUS(status); | |
1da177e4 LT |
605 | } |
606 | ||
4be44fcd | 607 | #endif /* ACPI_NO_METHOD_EXECUTION */ |
1da177e4 | 608 | |
44f6c012 | 609 | /******************************************************************************* |
1da177e4 LT |
610 | * |
611 | * FUNCTION: acpi_ds_init_object_from_op | |
612 | * | |
613 | * PARAMETERS: walk_state - Current walk state | |
ba494bee BM |
614 | * op - Parser op used to init the internal object |
615 | * opcode - AML opcode associated with the object | |
1da177e4 LT |
616 | * ret_obj_desc - Namespace object to be initialized |
617 | * | |
618 | * RETURN: Status | |
619 | * | |
620 | * DESCRIPTION: Initialize a namespace object from a parser Op and its | |
73a3090a | 621 | * associated arguments. The namespace object is a more compact |
1da177e4 LT |
622 | * representation of the Op and its arguments. |
623 | * | |
44f6c012 | 624 | ******************************************************************************/ |
1da177e4 LT |
625 | |
626 | acpi_status | |
4be44fcd LB |
627 | acpi_ds_init_object_from_op(struct acpi_walk_state *walk_state, |
628 | union acpi_parse_object *op, | |
629 | u16 opcode, | |
630 | union acpi_operand_object **ret_obj_desc) | |
1da177e4 | 631 | { |
4be44fcd LB |
632 | const struct acpi_opcode_info *op_info; |
633 | union acpi_operand_object *obj_desc; | |
634 | acpi_status status = AE_OK; | |
1da177e4 | 635 | |
b229cf92 | 636 | ACPI_FUNCTION_TRACE(ds_init_object_from_op); |
1da177e4 LT |
637 | |
638 | obj_desc = *ret_obj_desc; | |
4be44fcd | 639 | op_info = acpi_ps_get_opcode_info(opcode); |
1da177e4 | 640 | if (op_info->class == AML_CLASS_UNKNOWN) { |
52fc0b02 | 641 | |
1da177e4 LT |
642 | /* Unknown opcode */ |
643 | ||
4be44fcd | 644 | return_ACPI_STATUS(AE_TYPE); |
1da177e4 LT |
645 | } |
646 | ||
647 | /* Perform per-object initialization */ | |
648 | ||
3371c19c | 649 | switch (obj_desc->common.type) { |
1da177e4 LT |
650 | case ACPI_TYPE_BUFFER: |
651 | ||
652 | /* | |
653 | * Defer evaluation of Buffer term_arg operand | |
654 | */ | |
8f9337c8 BM |
655 | obj_desc->buffer.node = |
656 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
657 | walk_state->operands[0]); | |
1da177e4 LT |
658 | obj_desc->buffer.aml_start = op->named.data; |
659 | obj_desc->buffer.aml_length = op->named.length; | |
660 | break; | |
661 | ||
1da177e4 LT |
662 | case ACPI_TYPE_PACKAGE: |
663 | ||
664 | /* | |
665 | * Defer evaluation of Package term_arg operand | |
666 | */ | |
8f9337c8 BM |
667 | obj_desc->package.node = |
668 | ACPI_CAST_PTR(struct acpi_namespace_node, | |
669 | walk_state->operands[0]); | |
1da177e4 LT |
670 | obj_desc->package.aml_start = op->named.data; |
671 | obj_desc->package.aml_length = op->named.length; | |
672 | break; | |
673 | ||
1da177e4 LT |
674 | case ACPI_TYPE_INTEGER: |
675 | ||
676 | switch (op_info->type) { | |
677 | case AML_TYPE_CONSTANT: | |
678 | /* | |
679 | * Resolve AML Constants here - AND ONLY HERE! | |
680 | * All constants are integers. | |
44f6c012 RM |
681 | * We mark the integer with a flag that indicates that it started |
682 | * life as a constant -- so that stores to constants will perform | |
683 | * as expected (noop). zero_op is used as a placeholder for optional | |
684 | * target operands. | |
1da177e4 LT |
685 | */ |
686 | obj_desc->common.flags = AOPOBJ_AML_CONSTANT; | |
687 | ||
688 | switch (opcode) { | |
689 | case AML_ZERO_OP: | |
690 | ||
691 | obj_desc->integer.value = 0; | |
692 | break; | |
693 | ||
694 | case AML_ONE_OP: | |
695 | ||
696 | obj_desc->integer.value = 1; | |
697 | break; | |
698 | ||
699 | case AML_ONES_OP: | |
700 | ||
5df7e6cb | 701 | obj_desc->integer.value = ACPI_UINT64_MAX; |
1da177e4 LT |
702 | |
703 | /* Truncate value if we are executing from a 32-bit ACPI table */ | |
704 | ||
705 | #ifndef ACPI_NO_METHOD_EXECUTION | |
4be44fcd | 706 | acpi_ex_truncate_for32bit_table(obj_desc); |
1da177e4 LT |
707 | #endif |
708 | break; | |
709 | ||
710 | case AML_REVISION_OP: | |
711 | ||
712 | obj_desc->integer.value = ACPI_CA_VERSION; | |
713 | break; | |
714 | ||
715 | default: | |
716 | ||
b8e4d893 | 717 | ACPI_ERROR((AE_INFO, |
f6a22b0b | 718 | "Unknown constant opcode 0x%X", |
b8e4d893 | 719 | opcode)); |
1da177e4 LT |
720 | status = AE_AML_OPERAND_TYPE; |
721 | break; | |
722 | } | |
723 | break; | |
724 | ||
1da177e4 LT |
725 | case AML_TYPE_LITERAL: |
726 | ||
727 | obj_desc->integer.value = op->common.value.integer; | |
6f42ccf2 | 728 | #ifndef ACPI_NO_METHOD_EXECUTION |
4be44fcd | 729 | acpi_ex_truncate_for32bit_table(obj_desc); |
6f42ccf2 | 730 | #endif |
1da177e4 LT |
731 | break; |
732 | ||
1da177e4 | 733 | default: |
f6a22b0b | 734 | ACPI_ERROR((AE_INFO, "Unknown Integer type 0x%X", |
b8e4d893 | 735 | op_info->type)); |
1da177e4 LT |
736 | status = AE_AML_OPERAND_TYPE; |
737 | break; | |
738 | } | |
739 | break; | |
740 | ||
1da177e4 LT |
741 | case ACPI_TYPE_STRING: |
742 | ||
743 | obj_desc->string.pointer = op->common.value.string; | |
4be44fcd LB |
744 | obj_desc->string.length = |
745 | (u32) ACPI_STRLEN(op->common.value.string); | |
1da177e4 LT |
746 | |
747 | /* | |
748 | * The string is contained in the ACPI table, don't ever try | |
749 | * to delete it | |
750 | */ | |
751 | obj_desc->common.flags |= AOPOBJ_STATIC_POINTER; | |
752 | break; | |
753 | ||
1da177e4 LT |
754 | case ACPI_TYPE_METHOD: |
755 | break; | |
756 | ||
1da177e4 LT |
757 | case ACPI_TYPE_LOCAL_REFERENCE: |
758 | ||
759 | switch (op_info->type) { | |
760 | case AML_TYPE_LOCAL_VARIABLE: | |
761 | ||
1044f1f6 | 762 | /* Local ID (0-7) is (AML opcode - base AML_LOCAL_OP) */ |
1da177e4 | 763 | |
ba9c3f55 BM |
764 | obj_desc->reference.value = |
765 | ((u32)opcode) - AML_LOCAL_OP; | |
1044f1f6 | 766 | obj_desc->reference.class = ACPI_REFCLASS_LOCAL; |
1da177e4 LT |
767 | |
768 | #ifndef ACPI_NO_METHOD_EXECUTION | |
1044f1f6 BM |
769 | status = |
770 | acpi_ds_method_data_get_node(ACPI_REFCLASS_LOCAL, | |
771 | obj_desc->reference. | |
772 | value, walk_state, | |
773 | ACPI_CAST_INDIRECT_PTR | |
774 | (struct | |
775 | acpi_namespace_node, | |
776 | &obj_desc->reference. | |
777 | object)); | |
1da177e4 LT |
778 | #endif |
779 | break; | |
780 | ||
1da177e4 LT |
781 | case AML_TYPE_METHOD_ARGUMENT: |
782 | ||
1044f1f6 | 783 | /* Arg ID (0-6) is (AML opcode - base AML_ARG_OP) */ |
1da177e4 | 784 | |
ba9c3f55 | 785 | obj_desc->reference.value = ((u32)opcode) - AML_ARG_OP; |
1044f1f6 | 786 | obj_desc->reference.class = ACPI_REFCLASS_ARG; |
1da177e4 LT |
787 | |
788 | #ifndef ACPI_NO_METHOD_EXECUTION | |
1044f1f6 | 789 | status = acpi_ds_method_data_get_node(ACPI_REFCLASS_ARG, |
4be44fcd | 790 | obj_desc-> |
1044f1f6 | 791 | reference.value, |
4be44fcd | 792 | walk_state, |
57e664cf | 793 | ACPI_CAST_INDIRECT_PTR |
4be44fcd | 794 | (struct |
57e664cf BM |
795 | acpi_namespace_node, |
796 | &obj_desc-> | |
797 | reference. | |
798 | object)); | |
1da177e4 LT |
799 | #endif |
800 | break; | |
801 | ||
1044f1f6 | 802 | default: /* Object name or Debug object */ |
1da177e4 | 803 | |
1044f1f6 BM |
804 | switch (op->common.aml_opcode) { |
805 | case AML_INT_NAMEPATH_OP: | |
52fc0b02 | 806 | |
1da177e4 LT |
807 | /* Node was saved in Op */ |
808 | ||
809 | obj_desc->reference.node = op->common.node; | |
9e41d93c BM |
810 | obj_desc->reference.object = |
811 | op->common.node->object; | |
1044f1f6 BM |
812 | obj_desc->reference.class = ACPI_REFCLASS_NAME; |
813 | break; | |
814 | ||
815 | case AML_DEBUG_OP: | |
1da177e4 | 816 | |
1044f1f6 BM |
817 | obj_desc->reference.class = ACPI_REFCLASS_DEBUG; |
818 | break; | |
819 | ||
820 | default: | |
821 | ||
822 | ACPI_ERROR((AE_INFO, | |
f6a22b0b | 823 | "Unimplemented reference type for AML opcode: 0x%4.4X", |
1044f1f6 BM |
824 | opcode)); |
825 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
826 | } | |
1da177e4 LT |
827 | break; |
828 | } | |
829 | break; | |
830 | ||
1da177e4 LT |
831 | default: |
832 | ||
f6a22b0b | 833 | ACPI_ERROR((AE_INFO, "Unimplemented data type: 0x%X", |
3371c19c | 834 | obj_desc->common.type)); |
1da177e4 LT |
835 | |
836 | status = AE_AML_OPERAND_TYPE; | |
837 | break; | |
838 | } | |
839 | ||
4be44fcd | 840 | return_ACPI_STATUS(status); |
1da177e4 | 841 | } |