Commit | Line | Data |
---|---|---|
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 | 45 | #include <acpi/acpi.h> |
e2f7a777 LB |
46 | #include "accommon.h" |
47 | #include "acdispat.h" | |
48 | #include "acinterp.h" | |
49 | #include "amlcode.h" | |
50 | #include "acnamesp.h" | |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_EXECUTER |
4be44fcd | 53 | ACPI_MODULE_NAME("exstore") |
1da177e4 | 54 | |
44f6c012 | 55 | /* Local prototypes */ |
44f6c012 | 56 | static void |
4be44fcd LB |
57 | acpi_ex_do_debug_object(union acpi_operand_object *source_desc, |
58 | u32 level, u32 index); | |
44f6c012 RM |
59 | |
60 | static acpi_status | |
4be44fcd LB |
61 | acpi_ex_store_object_to_index(union acpi_operand_object *val_desc, |
62 | union acpi_operand_object *dest_desc, | |
63 | struct acpi_walk_state *walk_state); | |
44f6c012 RM |
64 | |
65 | /******************************************************************************* | |
66 | * | |
67 | * FUNCTION: acpi_ex_do_debug_object | |
68 | * | |
69 | * PARAMETERS: source_desc - Value to be stored | |
70 | * Level - Indentation level (used for packages) | |
71 | * Index - Current package element, zero if not pkg | |
72 | * | |
73 | * RETURN: None | |
74 | * | |
75 | * DESCRIPTION: Handles stores to the Debug Object. | |
76 | * | |
77 | ******************************************************************************/ | |
78 | ||
79 | static void | |
4be44fcd LB |
80 | acpi_ex_do_debug_object(union acpi_operand_object *source_desc, |
81 | u32 level, u32 index) | |
44f6c012 | 82 | { |
4be44fcd | 83 | u32 i; |
44f6c012 | 84 | |
b229cf92 | 85 | ACPI_FUNCTION_TRACE_PTR(ex_do_debug_object, source_desc); |
44f6c012 | 86 | |
d8846574 BM |
87 | /* Print line header as long as we are not in the middle of an object display */ |
88 | ||
89 | if (!((level > 0) && index == 0)) { | |
90 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s", | |
91 | level, " ")); | |
92 | } | |
44f6c012 RM |
93 | |
94 | /* Display index for package output only */ | |
95 | ||
96 | if (index > 0) { | |
4be44fcd LB |
97 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
98 | "(%.2u) ", index - 1)); | |
44f6c012 RM |
99 | } |
100 | ||
101 | if (!source_desc) { | |
d8846574 | 102 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n")); |
44f6c012 RM |
103 | return_VOID; |
104 | } | |
105 | ||
4be44fcd | 106 | if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == ACPI_DESC_TYPE_OPERAND) { |
d8846574 | 107 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s ", |
4be44fcd LB |
108 | acpi_ut_get_object_type_name |
109 | (source_desc))); | |
44f6c012 | 110 | |
4be44fcd LB |
111 | if (!acpi_ut_valid_internal_object(source_desc)) { |
112 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
113 | "%p, Invalid Internal Object!\n", | |
114 | source_desc)); | |
115 | return_VOID; | |
44f6c012 | 116 | } |
4be44fcd LB |
117 | } else if (ACPI_GET_DESCRIPTOR_TYPE(source_desc) == |
118 | ACPI_DESC_TYPE_NAMED) { | |
119 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%s: %p\n", | |
120 | acpi_ut_get_type_name(((struct | |
121 | acpi_namespace_node | |
122 | *)source_desc)-> | |
123 | type), | |
124 | source_desc)); | |
44f6c012 | 125 | return_VOID; |
4be44fcd | 126 | } else { |
44f6c012 RM |
127 | return_VOID; |
128 | } | |
129 | ||
61ce421b BM |
130 | /* source_desc is of type ACPI_DESC_TYPE_OPERAND */ |
131 | ||
3371c19c | 132 | switch (source_desc->common.type) { |
44f6c012 RM |
133 | case ACPI_TYPE_INTEGER: |
134 | ||
135 | /* Output correct integer width */ | |
136 | ||
137 | if (acpi_gbl_integer_byte_width == 4) { | |
4be44fcd LB |
138 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n", |
139 | (u32) source_desc->integer. | |
140 | value)); | |
141 | } else { | |
142 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
143 | "0x%8.8X%8.8X\n", | |
144 | ACPI_FORMAT_UINT64(source_desc-> | |
145 | integer. | |
146 | value))); | |
44f6c012 RM |
147 | } |
148 | break; | |
149 | ||
150 | case ACPI_TYPE_BUFFER: | |
151 | ||
4be44fcd LB |
152 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n", |
153 | (u32) source_desc->buffer.length)); | |
154 | ACPI_DUMP_BUFFER(source_desc->buffer.pointer, | |
155 | (source_desc->buffer.length < | |
422f4f90 | 156 | 256) ? source_desc->buffer.length : 256); |
44f6c012 RM |
157 | break; |
158 | ||
159 | case ACPI_TYPE_STRING: | |
160 | ||
4be44fcd LB |
161 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n", |
162 | source_desc->string.length, | |
163 | source_desc->string.pointer)); | |
44f6c012 RM |
164 | break; |
165 | ||
166 | case ACPI_TYPE_PACKAGE: | |
167 | ||
4be44fcd | 168 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
d8846574 | 169 | "[Contains 0x%.2X Elements]\n", |
4be44fcd | 170 | source_desc->package.count)); |
44f6c012 RM |
171 | |
172 | /* Output the entire contents of the package */ | |
173 | ||
174 | for (i = 0; i < source_desc->package.count; i++) { | |
4be44fcd LB |
175 | acpi_ex_do_debug_object(source_desc->package. |
176 | elements[i], level + 4, i + 1); | |
44f6c012 RM |
177 | } |
178 | break; | |
179 | ||
180 | case ACPI_TYPE_LOCAL_REFERENCE: | |
181 | ||
1044f1f6 BM |
182 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s] ", |
183 | acpi_ut_get_reference_name(source_desc))); | |
184 | ||
185 | /* Decode the reference */ | |
186 | ||
187 | switch (source_desc->reference.class) { | |
188 | case ACPI_REFCLASS_INDEX: | |
189 | ||
190 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "0x%X\n", | |
191 | source_desc->reference.value)); | |
192 | break; | |
193 | ||
194 | case ACPI_REFCLASS_TABLE: | |
44f6c012 | 195 | |
a76b7727 BM |
196 | /* Case for ddb_handle */ |
197 | ||
61ce421b | 198 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
1044f1f6 | 199 | "Table Index 0x%X\n", |
57e664cf | 200 | source_desc->reference.value)); |
a76b7727 | 201 | return; |
1044f1f6 BM |
202 | |
203 | default: | |
204 | break; | |
61ce421b BM |
205 | } |
206 | ||
d8846574 BM |
207 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, " ")); |
208 | ||
209 | /* Check for valid node first, then valid object */ | |
210 | ||
211 | if (source_desc->reference.node) { | |
212 | if (ACPI_GET_DESCRIPTOR_TYPE | |
213 | (source_desc->reference.node) != | |
214 | ACPI_DESC_TYPE_NAMED) { | |
215 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
216 | " %p - Not a valid namespace node\n", | |
217 | source_desc->reference. | |
218 | node)); | |
219 | } else { | |
220 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
221 | "Node %p [%4.4s] ", | |
222 | source_desc->reference. | |
223 | node, | |
224 | (source_desc->reference. | |
225 | node)->name.ascii)); | |
226 | ||
227 | switch ((source_desc->reference.node)->type) { | |
228 | ||
229 | /* These types have no attached object */ | |
230 | ||
231 | case ACPI_TYPE_DEVICE: | |
232 | acpi_os_printf("Device\n"); | |
233 | break; | |
234 | ||
235 | case ACPI_TYPE_THERMAL: | |
236 | acpi_os_printf("Thermal Zone\n"); | |
237 | break; | |
238 | ||
239 | default: | |
240 | acpi_ex_do_debug_object((source_desc-> | |
241 | reference. | |
242 | node)->object, | |
243 | level + 4, 0); | |
244 | break; | |
245 | } | |
246 | } | |
247 | } else if (source_desc->reference.object) { | |
4be44fcd LB |
248 | if (ACPI_GET_DESCRIPTOR_TYPE |
249 | (source_desc->reference.object) == | |
250 | ACPI_DESC_TYPE_NAMED) { | |
251 | acpi_ex_do_debug_object(((struct | |
252 | acpi_namespace_node *) | |
253 | source_desc->reference. | |
254 | object)->object, | |
255 | level + 4, 0); | |
256 | } else { | |
257 | acpi_ex_do_debug_object(source_desc->reference. | |
258 | object, level + 4, 0); | |
44f6c012 | 259 | } |
44f6c012 RM |
260 | } |
261 | break; | |
262 | ||
263 | default: | |
264 | ||
d8846574 BM |
265 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n", |
266 | source_desc)); | |
44f6c012 RM |
267 | break; |
268 | } | |
269 | ||
4be44fcd | 270 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n")); |
44f6c012 RM |
271 | return_VOID; |
272 | } | |
273 | ||
1da177e4 LT |
274 | /******************************************************************************* |
275 | * | |
276 | * FUNCTION: acpi_ex_store | |
277 | * | |
278 | * PARAMETERS: *source_desc - Value to be stored | |
279 | * *dest_desc - Where to store it. Must be an NS node | |
0211a9c8 | 280 | * or a union acpi_operand_object of type |
1da177e4 LT |
281 | * Reference; |
282 | * walk_state - Current walk state | |
283 | * | |
284 | * RETURN: Status | |
285 | * | |
286 | * DESCRIPTION: Store the value described by source_desc into the location | |
287 | * described by dest_desc. Called by various interpreter | |
288 | * functions to store the result of an operation into | |
289 | * the destination operand -- not just simply the actual "Store" | |
290 | * ASL operator. | |
291 | * | |
292 | ******************************************************************************/ | |
293 | ||
294 | acpi_status | |
4be44fcd LB |
295 | acpi_ex_store(union acpi_operand_object *source_desc, |
296 | union acpi_operand_object *dest_desc, | |
297 | struct acpi_walk_state *walk_state) | |
1da177e4 | 298 | { |
4be44fcd LB |
299 | acpi_status status = AE_OK; |
300 | union acpi_operand_object *ref_desc = dest_desc; | |
1da177e4 | 301 | |
b229cf92 | 302 | ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc); |
1da177e4 LT |
303 | |
304 | /* Validate parameters */ | |
305 | ||
306 | if (!source_desc || !dest_desc) { | |
b8e4d893 | 307 | ACPI_ERROR((AE_INFO, "Null parameter")); |
4be44fcd | 308 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
309 | } |
310 | ||
311 | /* dest_desc can be either a namespace node or an ACPI object */ | |
312 | ||
4be44fcd | 313 | if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) { |
1da177e4 LT |
314 | /* |
315 | * Dest is a namespace node, | |
316 | * Storing an object into a Named node. | |
317 | */ | |
4be44fcd LB |
318 | status = acpi_ex_store_object_to_node(source_desc, |
319 | (struct | |
320 | acpi_namespace_node *) | |
321 | dest_desc, walk_state, | |
322 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 | 323 | |
4be44fcd | 324 | return_ACPI_STATUS(status); |
1da177e4 LT |
325 | } |
326 | ||
327 | /* Destination object must be a Reference or a Constant object */ | |
328 | ||
3371c19c | 329 | switch (dest_desc->common.type) { |
1da177e4 LT |
330 | case ACPI_TYPE_LOCAL_REFERENCE: |
331 | break; | |
332 | ||
333 | case ACPI_TYPE_INTEGER: | |
334 | ||
335 | /* Allow stores to Constants -- a Noop as per ACPI spec */ | |
336 | ||
337 | if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) { | |
4be44fcd | 338 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
339 | } |
340 | ||
341 | /*lint -fallthrough */ | |
342 | ||
343 | default: | |
344 | ||
345 | /* Destination is not a Reference object */ | |
346 | ||
b8e4d893 BM |
347 | ACPI_ERROR((AE_INFO, |
348 | "Target is not a Reference or Constant object - %s [%p]", | |
349 | acpi_ut_get_object_type_name(dest_desc), | |
350 | dest_desc)); | |
1da177e4 | 351 | |
4be44fcd | 352 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
353 | } |
354 | ||
355 | /* | |
1044f1f6 | 356 | * Examine the Reference class. These cases are handled: |
1da177e4 LT |
357 | * |
358 | * 1) Store to Name (Change the object associated with a name) | |
359 | * 2) Store to an indexed area of a Buffer or Package | |
360 | * 3) Store to a Method Local or Arg | |
361 | * 4) Store to the debug object | |
362 | */ | |
1044f1f6 BM |
363 | switch (ref_desc->reference.class) { |
364 | case ACPI_REFCLASS_REFOF: | |
1da177e4 LT |
365 | |
366 | /* Storing an object into a Name "container" */ | |
367 | ||
4be44fcd LB |
368 | status = acpi_ex_store_object_to_node(source_desc, |
369 | ref_desc->reference. | |
370 | object, walk_state, | |
371 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 LT |
372 | break; |
373 | ||
1044f1f6 | 374 | case ACPI_REFCLASS_INDEX: |
1da177e4 LT |
375 | |
376 | /* Storing to an Index (pointer into a packager or buffer) */ | |
377 | ||
4be44fcd LB |
378 | status = |
379 | acpi_ex_store_object_to_index(source_desc, ref_desc, | |
380 | walk_state); | |
1da177e4 LT |
381 | break; |
382 | ||
1044f1f6 BM |
383 | case ACPI_REFCLASS_LOCAL: |
384 | case ACPI_REFCLASS_ARG: | |
1da177e4 LT |
385 | |
386 | /* Store to a method local/arg */ | |
387 | ||
4be44fcd | 388 | status = |
1044f1f6 BM |
389 | acpi_ds_store_object_to_local(ref_desc->reference.class, |
390 | ref_desc->reference.value, | |
4be44fcd | 391 | source_desc, walk_state); |
1da177e4 LT |
392 | break; |
393 | ||
1044f1f6 | 394 | case ACPI_REFCLASS_DEBUG: |
1da177e4 LT |
395 | |
396 | /* | |
397 | * Storing to the Debug object causes the value stored to be | |
398 | * displayed and otherwise has no effect -- see ACPI Specification | |
399 | */ | |
4be44fcd LB |
400 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
401 | "**** Write to Debug Object: Object %p %s ****:\n\n", | |
402 | source_desc, | |
403 | acpi_ut_get_object_type_name(source_desc))); | |
1da177e4 | 404 | |
4be44fcd | 405 | acpi_ex_do_debug_object(source_desc, 0, 0); |
1da177e4 LT |
406 | break; |
407 | ||
1da177e4 LT |
408 | default: |
409 | ||
1044f1f6 BM |
410 | ACPI_ERROR((AE_INFO, "Unknown Reference Class %2.2X", |
411 | ref_desc->reference.class)); | |
23d3e055 | 412 | ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO); |
1da177e4 LT |
413 | |
414 | status = AE_AML_INTERNAL; | |
415 | break; | |
416 | } | |
417 | ||
4be44fcd | 418 | return_ACPI_STATUS(status); |
1da177e4 LT |
419 | } |
420 | ||
1da177e4 LT |
421 | /******************************************************************************* |
422 | * | |
423 | * FUNCTION: acpi_ex_store_object_to_index | |
424 | * | |
425 | * PARAMETERS: *source_desc - Value to be stored | |
426 | * *dest_desc - Named object to receive the value | |
427 | * walk_state - Current walk state | |
428 | * | |
429 | * RETURN: Status | |
430 | * | |
431 | * DESCRIPTION: Store the object to indexed Buffer or Package element | |
432 | * | |
433 | ******************************************************************************/ | |
434 | ||
44f6c012 | 435 | static acpi_status |
4be44fcd LB |
436 | acpi_ex_store_object_to_index(union acpi_operand_object *source_desc, |
437 | union acpi_operand_object *index_desc, | |
438 | struct acpi_walk_state *walk_state) | |
1da177e4 | 439 | { |
4be44fcd LB |
440 | acpi_status status = AE_OK; |
441 | union acpi_operand_object *obj_desc; | |
442 | union acpi_operand_object *new_desc; | |
443 | u8 value = 0; | |
444 | u32 i; | |
1da177e4 | 445 | |
b229cf92 | 446 | ACPI_FUNCTION_TRACE(ex_store_object_to_index); |
1da177e4 LT |
447 | |
448 | /* | |
449 | * Destination must be a reference pointer, and | |
450 | * must point to either a buffer or a package | |
451 | */ | |
452 | switch (index_desc->reference.target_type) { | |
453 | case ACPI_TYPE_PACKAGE: | |
454 | /* | |
455 | * Storing to a package element. Copy the object and replace | |
456 | * any existing object with the new object. No implicit | |
457 | * conversion is performed. | |
458 | * | |
459 | * The object at *(index_desc->Reference.Where) is the | |
460 | * element within the package that is to be modified. | |
461 | * The parent package object is at index_desc->Reference.Object | |
462 | */ | |
463 | obj_desc = *(index_desc->reference.where); | |
464 | ||
3371c19c BM |
465 | if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE && |
466 | source_desc->reference.class == ACPI_REFCLASS_TABLE) { | |
bc7a36ab LM |
467 | |
468 | /* This is a DDBHandle, just add a reference to it */ | |
469 | ||
470 | acpi_ut_add_reference(source_desc); | |
471 | new_desc = source_desc; | |
472 | } else { | |
473 | /* Normal object, copy it */ | |
474 | ||
475 | status = | |
476 | acpi_ut_copy_iobject_to_iobject(source_desc, | |
477 | &new_desc, | |
478 | walk_state); | |
479 | if (ACPI_FAILURE(status)) { | |
480 | return_ACPI_STATUS(status); | |
481 | } | |
1da177e4 LT |
482 | } |
483 | ||
484 | if (obj_desc) { | |
52fc0b02 | 485 | |
1da177e4 LT |
486 | /* Decrement reference count by the ref count of the parent package */ |
487 | ||
4be44fcd LB |
488 | for (i = 0; i < ((union acpi_operand_object *) |
489 | index_desc->reference.object)->common. | |
490 | reference_count; i++) { | |
491 | acpi_ut_remove_reference(obj_desc); | |
1da177e4 LT |
492 | } |
493 | } | |
494 | ||
495 | *(index_desc->reference.where) = new_desc; | |
496 | ||
44f6c012 | 497 | /* Increment ref count by the ref count of the parent package-1 */ |
1da177e4 | 498 | |
4be44fcd LB |
499 | for (i = 1; i < ((union acpi_operand_object *) |
500 | index_desc->reference.object)->common. | |
501 | reference_count; i++) { | |
502 | acpi_ut_add_reference(new_desc); | |
1da177e4 LT |
503 | } |
504 | ||
505 | break; | |
506 | ||
1da177e4 LT |
507 | case ACPI_TYPE_BUFFER_FIELD: |
508 | ||
509 | /* | |
510 | * Store into a Buffer or String (not actually a real buffer_field) | |
511 | * at a location defined by an Index. | |
512 | * | |
513 | * The first 8-bit element of the source object is written to the | |
514 | * 8-bit Buffer location defined by the Index destination object, | |
515 | * according to the ACPI 2.0 specification. | |
516 | */ | |
517 | ||
518 | /* | |
519 | * Make sure the target is a Buffer or String. An error should | |
520 | * not happen here, since the reference_object was constructed | |
521 | * by the INDEX_OP code. | |
522 | */ | |
523 | obj_desc = index_desc->reference.object; | |
3371c19c BM |
524 | if ((obj_desc->common.type != ACPI_TYPE_BUFFER) && |
525 | (obj_desc->common.type != ACPI_TYPE_STRING)) { | |
4be44fcd | 526 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
527 | } |
528 | ||
529 | /* | |
530 | * The assignment of the individual elements will be slightly | |
531 | * different for each source type. | |
532 | */ | |
3371c19c | 533 | switch (source_desc->common.type) { |
1da177e4 LT |
534 | case ACPI_TYPE_INTEGER: |
535 | ||
536 | /* Use the least-significant byte of the integer */ | |
537 | ||
538 | value = (u8) (source_desc->integer.value); | |
539 | break; | |
540 | ||
541 | case ACPI_TYPE_BUFFER: | |
542 | case ACPI_TYPE_STRING: | |
543 | ||
544 | /* Note: Takes advantage of common string/buffer fields */ | |
545 | ||
546 | value = source_desc->buffer.pointer[0]; | |
547 | break; | |
548 | ||
549 | default: | |
550 | ||
551 | /* All other types are invalid */ | |
552 | ||
b8e4d893 BM |
553 | ACPI_ERROR((AE_INFO, |
554 | "Source must be Integer/Buffer/String type, not %s", | |
555 | acpi_ut_get_object_type_name(source_desc))); | |
4be44fcd | 556 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
557 | } |
558 | ||
559 | /* Store the source value into the target buffer byte */ | |
560 | ||
1044f1f6 | 561 | obj_desc->buffer.pointer[index_desc->reference.value] = value; |
1da177e4 LT |
562 | break; |
563 | ||
1da177e4 | 564 | default: |
b229cf92 | 565 | ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField")); |
1da177e4 LT |
566 | status = AE_AML_OPERAND_TYPE; |
567 | break; | |
568 | } | |
569 | ||
4be44fcd | 570 | return_ACPI_STATUS(status); |
1da177e4 LT |
571 | } |
572 | ||
1da177e4 LT |
573 | /******************************************************************************* |
574 | * | |
575 | * FUNCTION: acpi_ex_store_object_to_node | |
576 | * | |
577 | * PARAMETERS: source_desc - Value to be stored | |
578 | * Node - Named object to receive the value | |
579 | * walk_state - Current walk state | |
580 | * implicit_conversion - Perform implicit conversion (yes/no) | |
581 | * | |
582 | * RETURN: Status | |
583 | * | |
584 | * DESCRIPTION: Store the object to the named object. | |
585 | * | |
586 | * The Assignment of an object to a named object is handled here | |
587 | * The value passed in will replace the current value (if any) | |
588 | * with the input value. | |
589 | * | |
590 | * When storing into an object the data is converted to the | |
591 | * target object type then stored in the object. This means | |
592 | * that the target object type (for an initialized target) will | |
593 | * not be changed by a store operation. | |
594 | * | |
595 | * Assumes parameters are already validated. | |
596 | * | |
597 | ******************************************************************************/ | |
598 | ||
599 | acpi_status | |
4be44fcd LB |
600 | acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, |
601 | struct acpi_namespace_node *node, | |
602 | struct acpi_walk_state *walk_state, | |
603 | u8 implicit_conversion) | |
1da177e4 | 604 | { |
4be44fcd LB |
605 | acpi_status status = AE_OK; |
606 | union acpi_operand_object *target_desc; | |
607 | union acpi_operand_object *new_desc; | |
608 | acpi_object_type target_type; | |
1da177e4 | 609 | |
b229cf92 | 610 | ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc); |
1da177e4 | 611 | |
44f6c012 RM |
612 | /* Get current type of the node, and object attached to Node */ |
613 | ||
4be44fcd LB |
614 | target_type = acpi_ns_get_type(node); |
615 | target_desc = acpi_ns_get_attached_object(node); | |
1da177e4 | 616 | |
4be44fcd LB |
617 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n", |
618 | source_desc, | |
619 | acpi_ut_get_object_type_name(source_desc), node, | |
620 | acpi_ut_get_type_name(target_type))); | |
1da177e4 LT |
621 | |
622 | /* | |
623 | * Resolve the source object to an actual value | |
624 | * (If it is a reference object) | |
625 | */ | |
4be44fcd LB |
626 | status = acpi_ex_resolve_object(&source_desc, target_type, walk_state); |
627 | if (ACPI_FAILURE(status)) { | |
628 | return_ACPI_STATUS(status); | |
1da177e4 LT |
629 | } |
630 | ||
631 | /* If no implicit conversion, drop into the default case below */ | |
632 | ||
a3df4dad LM |
633 | if ((!implicit_conversion) || |
634 | ((walk_state->opcode == AML_COPY_OP) && | |
635 | (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) && | |
636 | (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) && | |
637 | (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) { | |
638 | /* | |
639 | * Force execution of default (no implicit conversion). Note: | |
640 | * copy_object does not perform an implicit conversion, as per the ACPI | |
641 | * spec -- except in case of region/bank/index fields -- because these | |
642 | * objects must retain their original type permanently. | |
643 | */ | |
1da177e4 LT |
644 | target_type = ACPI_TYPE_ANY; |
645 | } | |
646 | ||
44f6c012 RM |
647 | /* Do the actual store operation */ |
648 | ||
1da177e4 LT |
649 | switch (target_type) { |
650 | case ACPI_TYPE_BUFFER_FIELD: | |
651 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
652 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
653 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
654 | ||
44f6c012 RM |
655 | /* For fields, copy the source data to the target field. */ |
656 | ||
4be44fcd LB |
657 | status = acpi_ex_write_data_to_field(source_desc, target_desc, |
658 | &walk_state->result_obj); | |
1da177e4 LT |
659 | break; |
660 | ||
1da177e4 LT |
661 | case ACPI_TYPE_INTEGER: |
662 | case ACPI_TYPE_STRING: | |
663 | case ACPI_TYPE_BUFFER: | |
664 | ||
665 | /* | |
666 | * These target types are all of type Integer/String/Buffer, and | |
667 | * therefore support implicit conversion before the store. | |
668 | * | |
669 | * Copy and/or convert the source object to a new target object | |
670 | */ | |
4be44fcd LB |
671 | status = |
672 | acpi_ex_store_object_to_object(source_desc, target_desc, | |
673 | &new_desc, walk_state); | |
674 | if (ACPI_FAILURE(status)) { | |
675 | return_ACPI_STATUS(status); | |
1da177e4 LT |
676 | } |
677 | ||
678 | if (new_desc != target_desc) { | |
679 | /* | |
680 | * Store the new new_desc as the new value of the Name, and set | |
681 | * the Name's type to that of the value being stored in it. | |
682 | * source_desc reference count is incremented by attach_object. | |
683 | * | |
684 | * Note: This may change the type of the node if an explicit store | |
685 | * has been performed such that the node/object type has been | |
686 | * changed. | |
687 | */ | |
4be44fcd LB |
688 | status = |
689 | acpi_ns_attach_object(node, new_desc, | |
690 | new_desc->common.type); | |
691 | ||
692 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
693 | "Store %s into %s via Convert/Attach\n", | |
694 | acpi_ut_get_object_type_name | |
695 | (source_desc), | |
696 | acpi_ut_get_object_type_name | |
697 | (new_desc))); | |
1da177e4 LT |
698 | } |
699 | break; | |
700 | ||
1da177e4 LT |
701 | default: |
702 | ||
4be44fcd LB |
703 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
704 | "Storing %s (%p) directly into node (%p) with no implicit conversion\n", | |
705 | acpi_ut_get_object_type_name(source_desc), | |
706 | source_desc, node)); | |
1da177e4 LT |
707 | |
708 | /* No conversions for all other types. Just attach the source object */ | |
709 | ||
4be44fcd | 710 | status = acpi_ns_attach_object(node, source_desc, |
3371c19c | 711 | source_desc->common.type); |
1da177e4 LT |
712 | break; |
713 | } | |
714 | ||
4be44fcd | 715 | return_ACPI_STATUS(status); |
1da177e4 | 716 | } |