Commit | Line | Data |
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1da177e4 LT |
1 | |
2 | /****************************************************************************** | |
3 | * | |
4 | * Module Name: exstore - AML Interpreter object store support | |
5 | * | |
6 | *****************************************************************************/ | |
7 | ||
8 | /* | |
75a44ce0 | 9 | * Copyright (C) 2000 - 2008, Intel Corp. |
1da177e4 LT |
10 | * All rights reserved. |
11 | * | |
12 | * Redistribution and use in source and binary forms, with or without | |
13 | * modification, are permitted provided that the following conditions | |
14 | * are met: | |
15 | * 1. Redistributions of source code must retain the above copyright | |
16 | * notice, this list of conditions, and the following disclaimer, | |
17 | * without modification. | |
18 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer | |
19 | * substantially similar to the "NO WARRANTY" disclaimer below | |
20 | * ("Disclaimer") and any redistribution must be conditioned upon | |
21 | * including a substantially similar Disclaimer requirement for further | |
22 | * binary redistribution. | |
23 | * 3. Neither the names of the above-listed copyright holders nor the names | |
24 | * of any contributors may be used to endorse or promote products derived | |
25 | * from this software without specific prior written permission. | |
26 | * | |
27 | * Alternatively, this software may be distributed under the terms of the | |
28 | * GNU General Public License ("GPL") version 2 as published by the Free | |
29 | * Software Foundation. | |
30 | * | |
31 | * NO WARRANTY | |
32 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
33 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
34 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR | |
35 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
36 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
37 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
38 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
39 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
40 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
41 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
42 | * POSSIBILITY OF SUCH DAMAGES. | |
43 | */ | |
44 | ||
1da177e4 LT |
45 | #include <acpi/acpi.h> |
46 | #include <acpi/acdispat.h> | |
47 | #include <acpi/acinterp.h> | |
48 | #include <acpi/amlcode.h> | |
49 | #include <acpi/acnamesp.h> | |
50 | ||
1da177e4 | 51 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 52 | ACPI_MODULE_NAME("exstore") |
1da177e4 | 53 | |
44f6c012 | 54 | /* Local prototypes */ |
44f6c012 | 55 | static void |
4be44fcd LB |
56 | acpi_ex_do_debug_object(union acpi_operand_object *source_desc, |
57 | u32 level, u32 index); | |
44f6c012 RM |
58 | |
59 | static acpi_status | |
4be44fcd LB |
60 | acpi_ex_store_object_to_index(union acpi_operand_object *val_desc, |
61 | union acpi_operand_object *dest_desc, | |
62 | struct acpi_walk_state *walk_state); | |
44f6c012 RM |
63 | |
64 | /******************************************************************************* | |
65 | * | |
66 | * FUNCTION: acpi_ex_do_debug_object | |
67 | * | |
68 | * PARAMETERS: source_desc - Value to be stored | |
69 | * Level - Indentation level (used for packages) | |
70 | * Index - Current package element, zero if not pkg | |
71 | * | |
72 | * RETURN: None | |
73 | * | |
74 | * DESCRIPTION: Handles stores to the Debug Object. | |
75 | * | |
76 | ******************************************************************************/ | |
77 | ||
78 | static void | |
4be44fcd LB |
79 | acpi_ex_do_debug_object(union acpi_operand_object *source_desc, |
80 | u32 level, u32 index) | |
44f6c012 | 81 | { |
4be44fcd | 82 | u32 i; |
44f6c012 | 83 | |
b229cf92 | 84 | ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc); |
44f6c012 | 85 | |
d8846574 BM |
86 | /* Print line header as long as we are not in the middle of an object display */ |
87 | ||
88 | if (!((level > 0) && index == 0)) { | |
89 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s", | |
90 | level, " ")); | |
91 | } | |
44f6c012 RM |
92 | |
93 | /* Display index for package output only */ | |
94 | ||
95 | if (index > 0) { | |
4be44fcd LB |
96 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
97 | "(%.2u) ", index - 1)); | |
44f6c012 RM |
98 | } |
99 | ||
100 | if (!source_desc) { | |
d8846574 | 101 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n")); |
44f6c012 RM |
102 | return_VOID; |
103 | } | |
104 | ||
4be44fcd | 105 | if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) { |
d8846574 | 106 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s ", |
4be44fcd LB |
107 | acpi_ut_get_object_type_name |
108 | (source_desc))); | |
44f6c012 | 109 | |
4be44fcd LB |
110 | if (!acpi_ut_valid_internal_object(source_desc)) { |
111 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
112 | "%p, Invalid Internal Object!\n", | |
113 | source_desc)); | |
114 | return_VOID; | |
44f6c012 | 115 | } |
4be44fcd LB |
116 | } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == |
117 | ACPI_DESC_TYPE_NAMED) { | |
118 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n", | |
119 | acpi_ut_get_type_name(((struct | |
120 | acpi_namespace_node | |
121 | *)source_desc)-> | |
122 | type), | |
123 | source_desc)); | |
44f6c012 | 124 | return_VOID; |
4be44fcd | 125 | } else { |
44f6c012 RM |
126 | return_VOID; |
127 | } | |
128 | ||
61ce421b BM |
129 | /* source_desc is of type ACPI_DESC_TYPE_OPERAND */ |
130 | ||
4be44fcd | 131 | switch (ACPI_GET_OBJECT_TYPE(source_desc)) { |
44f6c012 RM |
132 | case ACPI_TYPE_INTEGER: |
133 | ||
134 | /* Output correct integer width */ | |
135 | ||
136 | if (acpi_gbl_integer_byte_width == 4) { | |
4be44fcd LB |
137 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n", |
138 | (u32) source_desc->integer. | |
139 | value)); | |
140 | } else { | |
141 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
142 | "0x%8.8X%8.8X\n", | |
143 | ACPI_FORMAT_UINT64(source_desc-> | |
144 | integer. | |
145 | value))); | |
44f6c012 RM |
146 | } |
147 | break; | |
148 | ||
149 | case ACPI_TYPE_BUFFER: | |
150 | ||
4be44fcd LB |
151 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n", |
152 | (u32) source_desc->buffer.length)); | |
153 | ACPI_DUMP_BUFFER(source_desc->buffer.pointer, | |
154 | (source_desc->buffer.length < | |
422f4f90 | 155 | 256) ? source_desc->buffer.length : 256); |
44f6c012 RM |
156 | break; |
157 | ||
158 | case ACPI_TYPE_STRING: | |
159 | ||
4be44fcd LB |
160 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n", |
161 | source_desc->string.length, | |
162 | source_desc->string.pointer)); | |
44f6c012 RM |
163 | break; |
164 | ||
165 | case ACPI_TYPE_PACKAGE: | |
166 | ||
4be44fcd | 167 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
d8846574 | 168 | "[Contains 0x%.2X Elements]\n", |
4be44fcd | 169 | source_desc->package.count)); |
44f6c012 RM |
170 | |
171 | /* Output the entire contents of the package */ | |
172 | ||
173 | for (i = 0; i < source_desc->package.count; i++) { | |
4be44fcd LB |
174 | acpi_ex_do_debug_object(source_desc->package. |
175 | elements[i], level + 4, i + 1); | |
44f6c012 RM |
176 | } |
177 | break; | |
178 | ||
179 | case ACPI_TYPE_LOCAL_REFERENCE: | |
180 | ||
1044f1f6 BM |
181 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ", |
182 | acpi_ut_get_reference_name(source_desc))); | |
183 | ||
184 | /* Decode the reference */ | |
185 | ||
186 | switch (source_desc->reference.class) { | |
187 | case ACPI_REFCLASS_INDEX: | |
188 | ||
189 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n", | |
190 | source_desc->reference.value)); | |
191 | break; | |
192 | ||
193 | case ACPI_REFCLASS_TABLE: | |
44f6c012 | 194 | |
61ce421b | 195 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
1044f1f6 | 196 | "Table Index 0x%X\n", |
57e664cf | 197 | source_desc->reference.value)); |
61ce421b | 198 | break; |
1044f1f6 BM |
199 | |
200 | default: | |
201 | break; | |
61ce421b BM |
202 | } |
203 | ||
d8846574 BM |
204 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, " ")); |
205 | ||
206 | /* Check for valid node first, then valid object */ | |
207 | ||
208 | if (source_desc->reference.node) { | |
209 | if (ACPI_GET_DESCRIPTOR_TYPE | |
210 | (source_desc->reference.node) != | |
211 | ACPI_DESC_TYPE_NAMED) { | |
212 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
213 | " %p - Not a valid namespace node\n", | |
214 | source_desc->reference. | |
215 | node)); | |
216 | } else { | |
217 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
218 | "Node %p [%4.4s] ", | |
219 | source_desc->reference. | |
220 | node, | |
221 | (source_desc->reference. | |
222 | node)->name.ascii)); | |
223 | ||
224 | switch ((source_desc->reference.node)->type) { | |
225 | ||
226 | /* These types have no attached object */ | |
227 | ||
228 | case ACPI_TYPE_DEVICE: | |
229 | acpi_os_printf("Device\n"); | |
230 | break; | |
231 | ||
232 | case ACPI_TYPE_THERMAL: | |
233 | acpi_os_printf("Thermal Zone\n"); | |
234 | break; | |
235 | ||
236 | default: | |
237 | acpi_ex_do_debug_object((source_desc-> | |
238 | reference. | |
239 | node)->object, | |
240 | level + 4, 0); | |
241 | break; | |
242 | } | |
243 | } | |
244 | } else if (source_desc->reference.object) { | |
4be44fcd LB |
245 | if (ACPI_GET_DESCRIPTOR_TYPE |
246 | (source_desc->reference.object) == | |
247 | ACPI_DESC_TYPE_NAMED) { | |
248 | acpi_ex_do_debug_object(((struct | |
249 | acpi_namespace_node *) | |
250 | source_desc->reference. | |
251 | object)->object, | |
252 | level + 4, 0); | |
253 | } else { | |
254 | acpi_ex_do_debug_object(source_desc->reference. | |
255 | object, level + 4, 0); | |
44f6c012 | 256 | } |
44f6c012 RM |
257 | } |
258 | break; | |
259 | ||
260 | default: | |
261 | ||
d8846574 BM |
262 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n", |
263 | source_desc)); | |
44f6c012 RM |
264 | break; |
265 | } | |
266 | ||
4be44fcd | 267 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n")); |
44f6c012 RM |
268 | return_VOID; |
269 | } | |
270 | ||
1da177e4 LT |
271 | /******************************************************************************* |
272 | * | |
273 | * FUNCTION: acpi_ex_store | |
274 | * | |
275 | * PARAMETERS: *source_desc - Value to be stored | |
276 | * *dest_desc - Where to store it. Must be an NS node | |
277 | * or an union acpi_operand_object of type | |
278 | * Reference; | |
279 | * walk_state - Current walk state | |
280 | * | |
281 | * RETURN: Status | |
282 | * | |
283 | * DESCRIPTION: Store the value described by source_desc into the location | |
284 | * described by dest_desc. Called by various interpreter | |
285 | * functions to store the result of an operation into | |
286 | * the destination operand -- not just simply the actual "Store" | |
287 | * ASL operator. | |
288 | * | |
289 | ******************************************************************************/ | |
290 | ||
291 | acpi_status | |
4be44fcd LB |
292 | acpi_ex_store(union acpi_operand_object *source_desc, |
293 | union acpi_operand_object *dest_desc, | |
294 | struct acpi_walk_state *walk_state) | |
1da177e4 | 295 | { |
4be44fcd LB |
296 | acpi_status status = AE_OK; |
297 | union acpi_operand_object *ref_desc = dest_desc; | |
1da177e4 | 298 | |
b229cf92 | 299 | ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc); |
1da177e4 LT |
300 | |
301 | /* Validate parameters */ | |
302 | ||
303 | if (!source_desc || !dest_desc) { | |
b8e4d893 | 304 | ACPI_ERROR((AE_INFO, "Null parameter")); |
4be44fcd | 305 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
306 | } |
307 | ||
308 | /* dest_desc can be either a namespace node or an ACPI object */ | |
309 | ||
4be44fcd | 310 | if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) { |
1da177e4 LT |
311 | /* |
312 | * Dest is a namespace node, | |
313 | * Storing an object into a Named node. | |
314 | */ | |
4be44fcd LB |
315 | status = acpi_ex_store_object_to_node(source_desc, |
316 | (struct | |
317 | acpi_namespace_node *) | |
318 | dest_desc, walk_state, | |
319 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 | 320 | |
4be44fcd | 321 | return_ACPI_STATUS(status); |
1da177e4 LT |
322 | } |
323 | ||
324 | /* Destination object must be a Reference or a Constant object */ | |
325 | ||
4be44fcd | 326 | switch (ACPI_GET_OBJECT_TYPE(dest_desc)) { |
1da177e4 LT |
327 | case ACPI_TYPE_LOCAL_REFERENCE: |
328 | break; | |
329 | ||
330 | case ACPI_TYPE_INTEGER: | |
331 | ||
332 | /* Allow stores to Constants -- a Noop as per ACPI spec */ | |
333 | ||
334 | if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) { | |
4be44fcd | 335 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
336 | } |
337 | ||
338 | /*lint -fallthrough */ | |
339 | ||
340 | default: | |
341 | ||
342 | /* Destination is not a Reference object */ | |
343 | ||
b8e4d893 BM |
344 | ACPI_ERROR((AE_INFO, |
345 | "Target is not a Reference or Constant object - %s [%p]", | |
346 | acpi_ut_get_object_type_name(dest_desc), | |
347 | dest_desc)); | |
1da177e4 | 348 | |
4be44fcd | 349 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
350 | } |
351 | ||
352 | /* | |
1044f1f6 | 353 | * Examine the Reference class. These cases are handled: |
1da177e4 LT |
354 | * |
355 | * 1) Store to Name (Change the object associated with a name) | |
356 | * 2) Store to an indexed area of a Buffer or Package | |
357 | * 3) Store to a Method Local or Arg | |
358 | * 4) Store to the debug object | |
359 | */ | |
1044f1f6 BM |
360 | switch (ref_desc->reference.class) { |
361 | case ACPI_REFCLASS_REFOF: | |
1da177e4 LT |
362 | |
363 | /* Storing an object into a Name "container" */ | |
364 | ||
4be44fcd LB |
365 | status = acpi_ex_store_object_to_node(source_desc, |
366 | ref_desc->reference. | |
367 | object, walk_state, | |
368 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 LT |
369 | break; |
370 | ||
1044f1f6 | 371 | case ACPI_REFCLASS_INDEX: |
1da177e4 LT |
372 | |
373 | /* Storing to an Index (pointer into a packager or buffer) */ | |
374 | ||
4be44fcd LB |
375 | status = |
376 | acpi_ex_store_object_to_index(source_desc, ref_desc, | |
377 | walk_state); | |
1da177e4 LT |
378 | break; |
379 | ||
1044f1f6 BM |
380 | case ACPI_REFCLASS_LOCAL: |
381 | case ACPI_REFCLASS_ARG: | |
1da177e4 LT |
382 | |
383 | /* Store to a method local/arg */ | |
384 | ||
4be44fcd | 385 | status = |
1044f1f6 BM |
386 | acpi_ds_store_object_to_local(ref_desc->reference.class, |
387 | ref_desc->reference.value, | |
4be44fcd | 388 | source_desc, walk_state); |
1da177e4 LT |
389 | break; |
390 | ||
1044f1f6 | 391 | case ACPI_REFCLASS_DEBUG: |
1da177e4 LT |
392 | |
393 | /* | |
394 | * Storing to the Debug object causes the value stored to be | |
395 | * displayed and otherwise has no effect -- see ACPI Specification | |
396 | */ | |
4be44fcd LB |
397 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
398 | "**** Write to Debug Object: Object %p %s ****:\n\n", | |
399 | source_desc, | |
400 | acpi_ut_get_object_type_name(source_desc))); | |
1da177e4 | 401 | |
4be44fcd | 402 | acpi_ex_do_debug_object(source_desc, 0, 0); |
1da177e4 LT |
403 | break; |
404 | ||
1da177e4 LT |
405 | default: |
406 | ||
1044f1f6 BM |
407 | ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X", |
408 | ref_desc->reference.class)); | |
23d3e055 | 409 | ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO); |
1da177e4 LT |
410 | |
411 | status = AE_AML_INTERNAL; | |
412 | break; | |
413 | } | |
414 | ||
4be44fcd | 415 | return_ACPI_STATUS(status); |
1da177e4 LT |
416 | } |
417 | ||
1da177e4 LT |
418 | /******************************************************************************* |
419 | * | |
420 | * FUNCTION: acpi_ex_store_object_to_index | |
421 | * | |
422 | * PARAMETERS: *source_desc - Value to be stored | |
423 | * *dest_desc - Named object to receive the value | |
424 | * walk_state - Current walk state | |
425 | * | |
426 | * RETURN: Status | |
427 | * | |
428 | * DESCRIPTION: Store the object to indexed Buffer or Package element | |
429 | * | |
430 | ******************************************************************************/ | |
431 | ||
44f6c012 | 432 | static acpi_status |
4be44fcd LB |
433 | acpi_ex_store_object_to_index(union acpi_operand_object *source_desc, |
434 | union acpi_operand_object *index_desc, | |
435 | struct acpi_walk_state *walk_state) | |
1da177e4 | 436 | { |
4be44fcd LB |
437 | acpi_status status = AE_OK; |
438 | union acpi_operand_object *obj_desc; | |
439 | union acpi_operand_object *new_desc; | |
440 | u8 value = 0; | |
441 | u32 i; | |
1da177e4 | 442 | |
b229cf92 | 443 | ACPI_FUNCTION_TRACE(ex_store_object_to_index); |
1da177e4 LT |
444 | |
445 | /* | |
446 | * Destination must be a reference pointer, and | |
447 | * must point to either a buffer or a package | |
448 | */ | |
449 | switch (index_desc->reference.target_type) { | |
450 | case ACPI_TYPE_PACKAGE: | |
451 | /* | |
452 | * Storing to a package element. Copy the object and replace | |
453 | * any existing object with the new object. No implicit | |
454 | * conversion is performed. | |
455 | * | |
456 | * The object at *(index_desc->Reference.Where) is the | |
457 | * element within the package that is to be modified. | |
458 | * The parent package object is at index_desc->Reference.Object | |
459 | */ | |
460 | obj_desc = *(index_desc->reference.where); | |
461 | ||
bc7a36ab LM |
462 | if (ACPI_GET_OBJECT_TYPE(source_desc) == |
463 | ACPI_TYPE_LOCAL_REFERENCE | |
1044f1f6 | 464 | && source_desc->reference.class == ACPI_REFCLASS_TABLE) { |
bc7a36ab LM |
465 | |
466 | /* This is a DDBHandle, just add a reference to it */ | |
467 | ||
468 | acpi_ut_add_reference(source_desc); | |
469 | new_desc = source_desc; | |
470 | } else { | |
471 | /* Normal object, copy it */ | |
472 | ||
473 | status = | |
474 | acpi_ut_copy_iobject_to_iobject(source_desc, | |
475 | &new_desc, | |
476 | walk_state); | |
477 | if (ACPI_FAILURE(status)) { | |
478 | return_ACPI_STATUS(status); | |
479 | } | |
1da177e4 LT |
480 | } |
481 | ||
482 | if (obj_desc) { | |
52fc0b02 | 483 | |
1da177e4 LT |
484 | /* Decrement reference count by the ref count of the parent package */ |
485 | ||
4be44fcd LB |
486 | for (i = 0; i < ((union acpi_operand_object *) |
487 | index_desc->reference.object)->common. | |
488 | reference_count; i++) { | |
489 | acpi_ut_remove_reference(obj_desc); | |
1da177e4 LT |
490 | } |
491 | } | |
492 | ||
493 | *(index_desc->reference.where) = new_desc; | |
494 | ||
44f6c012 | 495 | /* Increment ref count by the ref count of the parent package-1 */ |
1da177e4 | 496 | |
4be44fcd LB |
497 | for (i = 1; i < ((union acpi_operand_object *) |
498 | index_desc->reference.object)->common. | |
499 | reference_count; i++) { | |
500 | acpi_ut_add_reference(new_desc); | |
1da177e4 LT |
501 | } |
502 | ||
503 | break; | |
504 | ||
1da177e4 LT |
505 | case ACPI_TYPE_BUFFER_FIELD: |
506 | ||
507 | /* | |
508 | * Store into a Buffer or String (not actually a real buffer_field) | |
509 | * at a location defined by an Index. | |
510 | * | |
511 | * The first 8-bit element of the source object is written to the | |
512 | * 8-bit Buffer location defined by the Index destination object, | |
513 | * according to the ACPI 2.0 specification. | |
514 | */ | |
515 | ||
516 | /* | |
517 | * Make sure the target is a Buffer or String. An error should | |
518 | * not happen here, since the reference_object was constructed | |
519 | * by the INDEX_OP code. | |
520 | */ | |
521 | obj_desc = index_desc->reference.object; | |
4be44fcd LB |
522 | if ((ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_BUFFER) && |
523 | (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_STRING)) { | |
524 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
1da177e4 LT |
525 | } |
526 | ||
527 | /* | |
528 | * The assignment of the individual elements will be slightly | |
529 | * different for each source type. | |
530 | */ | |
4be44fcd | 531 | switch (ACPI_GET_OBJECT_TYPE(source_desc)) { |
1da177e4 LT |
532 | case ACPI_TYPE_INTEGER: |
533 | ||
534 | /* Use the least-significant byte of the integer */ | |
535 | ||
536 | value = (u8) (source_desc->integer.value); | |
537 | break; | |
538 | ||
539 | case ACPI_TYPE_BUFFER: | |
540 | case ACPI_TYPE_STRING: | |
541 | ||
542 | /* Note: Takes advantage of common string/buffer fields */ | |
543 | ||
544 | value = source_desc->buffer.pointer[0]; | |
545 | break; | |
546 | ||
547 | default: | |
548 | ||
549 | /* All other types are invalid */ | |
550 | ||
b8e4d893 BM |
551 | ACPI_ERROR((AE_INFO, |
552 | "Source must be Integer/Buffer/String type, not %s", | |
553 | acpi_ut_get_object_type_name(source_desc))); | |
4be44fcd | 554 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
555 | } |
556 | ||
557 | /* Store the source value into the target buffer byte */ | |
558 | ||
1044f1f6 | 559 | obj_desc->buffer.pointer[index_desc->reference.value] = value; |
1da177e4 LT |
560 | break; |
561 | ||
1da177e4 | 562 | default: |
b229cf92 | 563 | ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField")); |
1da177e4 LT |
564 | status = AE_AML_OPERAND_TYPE; |
565 | break; | |
566 | } | |
567 | ||
4be44fcd | 568 | return_ACPI_STATUS(status); |
1da177e4 LT |
569 | } |
570 | ||
1da177e4 LT |
571 | /******************************************************************************* |
572 | * | |
573 | * FUNCTION: acpi_ex_store_object_to_node | |
574 | * | |
575 | * PARAMETERS: source_desc - Value to be stored | |
576 | * Node - Named object to receive the value | |
577 | * walk_state - Current walk state | |
578 | * implicit_conversion - Perform implicit conversion (yes/no) | |
579 | * | |
580 | * RETURN: Status | |
581 | * | |
582 | * DESCRIPTION: Store the object to the named object. | |
583 | * | |
584 | * The Assignment of an object to a named object is handled here | |
585 | * The value passed in will replace the current value (if any) | |
586 | * with the input value. | |
587 | * | |
588 | * When storing into an object the data is converted to the | |
589 | * target object type then stored in the object. This means | |
590 | * that the target object type (for an initialized target) will | |
591 | * not be changed by a store operation. | |
592 | * | |
593 | * Assumes parameters are already validated. | |
594 | * | |
595 | ******************************************************************************/ | |
596 | ||
597 | acpi_status | |
4be44fcd LB |
598 | acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, |
599 | struct acpi_namespace_node *node, | |
600 | struct acpi_walk_state *walk_state, | |
601 | u8 implicit_conversion) | |
1da177e4 | 602 | { |
4be44fcd LB |
603 | acpi_status status = AE_OK; |
604 | union acpi_operand_object *target_desc; | |
605 | union acpi_operand_object *new_desc; | |
606 | acpi_object_type target_type; | |
1da177e4 | 607 | |
b229cf92 | 608 | ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc); |
1da177e4 | 609 | |
44f6c012 RM |
610 | /* Get current type of the node, and object attached to Node */ |
611 | ||
4be44fcd LB |
612 | target_type = acpi_ns_get_type(node); |
613 | target_desc = acpi_ns_get_attached_object(node); | |
1da177e4 | 614 | |
4be44fcd LB |
615 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n", |
616 | source_desc, | |
617 | acpi_ut_get_object_type_name(source_desc), node, | |
618 | acpi_ut_get_type_name(target_type))); | |
1da177e4 LT |
619 | |
620 | /* | |
621 | * Resolve the source object to an actual value | |
622 | * (If it is a reference object) | |
623 | */ | |
4be44fcd LB |
624 | status = acpi_ex_resolve_object(&source_desc, target_type, walk_state); |
625 | if (ACPI_FAILURE(status)) { | |
626 | return_ACPI_STATUS(status); | |
1da177e4 LT |
627 | } |
628 | ||
629 | /* If no implicit conversion, drop into the default case below */ | |
630 | ||
a3df4dad LM |
631 | if ((!implicit_conversion) || |
632 | ((walk_state->opcode == AML_COPY_OP) && | |
633 | (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) && | |
634 | (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) && | |
635 | (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) { | |
636 | /* | |
637 | * Force execution of default (no implicit conversion). Note: | |
638 | * copy_object does not perform an implicit conversion, as per the ACPI | |
639 | * spec -- except in case of region/bank/index fields -- because these | |
640 | * objects must retain their original type permanently. | |
641 | */ | |
1da177e4 LT |
642 | target_type = ACPI_TYPE_ANY; |
643 | } | |
644 | ||
44f6c012 RM |
645 | /* Do the actual store operation */ |
646 | ||
1da177e4 LT |
647 | switch (target_type) { |
648 | case ACPI_TYPE_BUFFER_FIELD: | |
649 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
650 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
651 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
652 | ||
44f6c012 RM |
653 | /* For fields, copy the source data to the target field. */ |
654 | ||
4be44fcd LB |
655 | status = acpi_ex_write_data_to_field(source_desc, target_desc, |
656 | &walk_state->result_obj); | |
1da177e4 LT |
657 | break; |
658 | ||
1da177e4 LT |
659 | case ACPI_TYPE_INTEGER: |
660 | case ACPI_TYPE_STRING: | |
661 | case ACPI_TYPE_BUFFER: | |
662 | ||
663 | /* | |
664 | * These target types are all of type Integer/String/Buffer, and | |
665 | * therefore support implicit conversion before the store. | |
666 | * | |
667 | * Copy and/or convert the source object to a new target object | |
668 | */ | |
4be44fcd LB |
669 | status = |
670 | acpi_ex_store_object_to_object(source_desc, target_desc, | |
671 | &new_desc, walk_state); | |
672 | if (ACPI_FAILURE(status)) { | |
673 | return_ACPI_STATUS(status); | |
1da177e4 LT |
674 | } |
675 | ||
676 | if (new_desc != target_desc) { | |
677 | /* | |
678 | * Store the new new_desc as the new value of the Name, and set | |
679 | * the Name's type to that of the value being stored in it. | |
680 | * source_desc reference count is incremented by attach_object. | |
681 | * | |
682 | * Note: This may change the type of the node if an explicit store | |
683 | * has been performed such that the node/object type has been | |
684 | * changed. | |
685 | */ | |
4be44fcd LB |
686 | status = |
687 | acpi_ns_attach_object(node, new_desc, | |
688 | new_desc->common.type); | |
689 | ||
690 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
691 | "Store %s into %s via Convert/Attach\n", | |
692 | acpi_ut_get_object_type_name | |
693 | (source_desc), | |
694 | acpi_ut_get_object_type_name | |
695 | (new_desc))); | |
1da177e4 LT |
696 | } |
697 | break; | |
698 | ||
1da177e4 LT |
699 | default: |
700 | ||
4be44fcd LB |
701 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
702 | "Storing %s (%p) directly into node (%p) with no implicit conversion\n", | |
703 | acpi_ut_get_object_type_name(source_desc), | |
704 | source_desc, node)); | |
1da177e4 LT |
705 | |
706 | /* No conversions for all other types. Just attach the source object */ | |
707 | ||
4be44fcd LB |
708 | status = acpi_ns_attach_object(node, source_desc, |
709 | ACPI_GET_OBJECT_TYPE | |
710 | (source_desc)); | |
1da177e4 LT |
711 | break; |
712 | } | |
713 | ||
4be44fcd | 714 | return_ACPI_STATUS(status); |
1da177e4 | 715 | } |