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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> | |
44f6c012 | 50 | #include <acpi/acparser.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 | ||
4be44fcd | 132 | switch (ACPI_GET_OBJECT_TYPE(source_desc)) { |
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 | ||
182 | if (source_desc->reference.opcode == AML_INDEX_OP) { | |
4be44fcd LB |
183 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, |
184 | "[%s, 0x%X]\n", | |
185 | acpi_ps_get_opcode_name | |
186 | (source_desc->reference.opcode), | |
187 | source_desc->reference.offset)); | |
188 | } else { | |
61ce421b | 189 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "[%s]", |
4be44fcd LB |
190 | acpi_ps_get_opcode_name |
191 | (source_desc->reference.opcode))); | |
44f6c012 | 192 | } |
44f6c012 | 193 | |
61ce421b BM |
194 | if (source_desc->reference.opcode == AML_LOAD_OP) { /* Load and load_table */ |
195 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
b7f9f042 | 196 | " Table OwnerId %p\n", |
61ce421b BM |
197 | source_desc->reference.object)); |
198 | break; | |
199 | } | |
200 | ||
d8846574 BM |
201 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, " ")); |
202 | ||
203 | /* Check for valid node first, then valid object */ | |
204 | ||
205 | if (source_desc->reference.node) { | |
206 | if (ACPI_GET_DESCRIPTOR_TYPE | |
207 | (source_desc->reference.node) != | |
208 | ACPI_DESC_TYPE_NAMED) { | |
209 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
210 | " %p - Not a valid namespace node\n", | |
211 | source_desc->reference. | |
212 | node)); | |
213 | } else { | |
214 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, | |
215 | "Node %p [%4.4s] ", | |
216 | source_desc->reference. | |
217 | node, | |
218 | (source_desc->reference. | |
219 | node)->name.ascii)); | |
220 | ||
221 | switch ((source_desc->reference.node)->type) { | |
222 | ||
223 | /* These types have no attached object */ | |
224 | ||
225 | case ACPI_TYPE_DEVICE: | |
226 | acpi_os_printf("Device\n"); | |
227 | break; | |
228 | ||
229 | case ACPI_TYPE_THERMAL: | |
230 | acpi_os_printf("Thermal Zone\n"); | |
231 | break; | |
232 | ||
233 | default: | |
234 | acpi_ex_do_debug_object((source_desc-> | |
235 | reference. | |
236 | node)->object, | |
237 | level + 4, 0); | |
238 | break; | |
239 | } | |
240 | } | |
241 | } else if (source_desc->reference.object) { | |
4be44fcd LB |
242 | if (ACPI_GET_DESCRIPTOR_TYPE |
243 | (source_desc->reference.object) == | |
244 | ACPI_DESC_TYPE_NAMED) { | |
245 | acpi_ex_do_debug_object(((struct | |
246 | acpi_namespace_node *) | |
247 | source_desc->reference. | |
248 | object)->object, | |
249 | level + 4, 0); | |
250 | } else { | |
251 | acpi_ex_do_debug_object(source_desc->reference. | |
252 | object, level + 4, 0); | |
44f6c012 | 253 | } |
44f6c012 RM |
254 | } |
255 | break; | |
256 | ||
257 | default: | |
258 | ||
d8846574 BM |
259 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_DEBUG_OBJECT, "%p\n", |
260 | source_desc)); | |
44f6c012 RM |
261 | break; |
262 | } | |
263 | ||
4be44fcd | 264 | ACPI_DEBUG_PRINT_RAW((ACPI_DB_EXEC, "\n")); |
44f6c012 RM |
265 | return_VOID; |
266 | } | |
267 | ||
1da177e4 LT |
268 | /******************************************************************************* |
269 | * | |
270 | * FUNCTION: acpi_ex_store | |
271 | * | |
272 | * PARAMETERS: *source_desc - Value to be stored | |
273 | * *dest_desc - Where to store it. Must be an NS node | |
274 | * or an union acpi_operand_object of type | |
275 | * Reference; | |
276 | * walk_state - Current walk state | |
277 | * | |
278 | * RETURN: Status | |
279 | * | |
280 | * DESCRIPTION: Store the value described by source_desc into the location | |
281 | * described by dest_desc. Called by various interpreter | |
282 | * functions to store the result of an operation into | |
283 | * the destination operand -- not just simply the actual "Store" | |
284 | * ASL operator. | |
285 | * | |
286 | ******************************************************************************/ | |
287 | ||
288 | acpi_status | |
4be44fcd LB |
289 | acpi_ex_store(union acpi_operand_object *source_desc, |
290 | union acpi_operand_object *dest_desc, | |
291 | struct acpi_walk_state *walk_state) | |
1da177e4 | 292 | { |
4be44fcd LB |
293 | acpi_status status = AE_OK; |
294 | union acpi_operand_object *ref_desc = dest_desc; | |
1da177e4 | 295 | |
b229cf92 | 296 | ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc); |
1da177e4 LT |
297 | |
298 | /* Validate parameters */ | |
299 | ||
300 | if (!source_desc || !dest_desc) { | |
b8e4d893 | 301 | ACPI_ERROR((AE_INFO, "Null parameter")); |
4be44fcd | 302 | return_ACPI_STATUS(AE_AML_NO_OPERAND); |
1da177e4 LT |
303 | } |
304 | ||
305 | /* dest_desc can be either a namespace node or an ACPI object */ | |
306 | ||
4be44fcd | 307 | if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) { |
1da177e4 LT |
308 | /* |
309 | * Dest is a namespace node, | |
310 | * Storing an object into a Named node. | |
311 | */ | |
4be44fcd LB |
312 | status = acpi_ex_store_object_to_node(source_desc, |
313 | (struct | |
314 | acpi_namespace_node *) | |
315 | dest_desc, walk_state, | |
316 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 | 317 | |
4be44fcd | 318 | return_ACPI_STATUS(status); |
1da177e4 LT |
319 | } |
320 | ||
321 | /* Destination object must be a Reference or a Constant object */ | |
322 | ||
4be44fcd | 323 | switch (ACPI_GET_OBJECT_TYPE(dest_desc)) { |
1da177e4 LT |
324 | case ACPI_TYPE_LOCAL_REFERENCE: |
325 | break; | |
326 | ||
327 | case ACPI_TYPE_INTEGER: | |
328 | ||
329 | /* Allow stores to Constants -- a Noop as per ACPI spec */ | |
330 | ||
331 | if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) { | |
4be44fcd | 332 | return_ACPI_STATUS(AE_OK); |
1da177e4 LT |
333 | } |
334 | ||
335 | /*lint -fallthrough */ | |
336 | ||
337 | default: | |
338 | ||
339 | /* Destination is not a Reference object */ | |
340 | ||
b8e4d893 BM |
341 | ACPI_ERROR((AE_INFO, |
342 | "Target is not a Reference or Constant object - %s [%p]", | |
343 | acpi_ut_get_object_type_name(dest_desc), | |
344 | dest_desc)); | |
1da177e4 | 345 | |
4be44fcd | 346 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
347 | } |
348 | ||
349 | /* | |
350 | * Examine the Reference opcode. These cases are handled: | |
351 | * | |
352 | * 1) Store to Name (Change the object associated with a name) | |
353 | * 2) Store to an indexed area of a Buffer or Package | |
354 | * 3) Store to a Method Local or Arg | |
355 | * 4) Store to the debug object | |
356 | */ | |
357 | switch (ref_desc->reference.opcode) { | |
1da177e4 LT |
358 | case AML_REF_OF_OP: |
359 | ||
360 | /* Storing an object into a Name "container" */ | |
361 | ||
4be44fcd LB |
362 | status = acpi_ex_store_object_to_node(source_desc, |
363 | ref_desc->reference. | |
364 | object, walk_state, | |
365 | ACPI_IMPLICIT_CONVERSION); | |
1da177e4 LT |
366 | break; |
367 | ||
1da177e4 LT |
368 | case AML_INDEX_OP: |
369 | ||
370 | /* Storing to an Index (pointer into a packager or buffer) */ | |
371 | ||
4be44fcd LB |
372 | status = |
373 | acpi_ex_store_object_to_index(source_desc, ref_desc, | |
374 | walk_state); | |
1da177e4 LT |
375 | break; |
376 | ||
1da177e4 LT |
377 | case AML_LOCAL_OP: |
378 | case AML_ARG_OP: | |
379 | ||
380 | /* Store to a method local/arg */ | |
381 | ||
4be44fcd LB |
382 | status = |
383 | acpi_ds_store_object_to_local(ref_desc->reference.opcode, | |
384 | ref_desc->reference.offset, | |
385 | source_desc, walk_state); | |
1da177e4 LT |
386 | break; |
387 | ||
1da177e4 LT |
388 | case AML_DEBUG_OP: |
389 | ||
390 | /* | |
391 | * Storing to the Debug object causes the value stored to be | |
392 | * displayed and otherwise has no effect -- see ACPI Specification | |
393 | */ | |
4be44fcd LB |
394 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
395 | "**** Write to Debug Object: Object %p %s ****:\n\n", | |
396 | source_desc, | |
397 | acpi_ut_get_object_type_name(source_desc))); | |
1da177e4 | 398 | |
4be44fcd | 399 | acpi_ex_do_debug_object(source_desc, 0, 0); |
1da177e4 LT |
400 | break; |
401 | ||
1da177e4 LT |
402 | default: |
403 | ||
b8e4d893 BM |
404 | ACPI_ERROR((AE_INFO, "Unknown Reference opcode %X", |
405 | ref_desc->reference.opcode)); | |
4be44fcd | 406 | ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_ERROR); |
1da177e4 LT |
407 | |
408 | status = AE_AML_INTERNAL; | |
409 | break; | |
410 | } | |
411 | ||
4be44fcd | 412 | return_ACPI_STATUS(status); |
1da177e4 LT |
413 | } |
414 | ||
1da177e4 LT |
415 | /******************************************************************************* |
416 | * | |
417 | * FUNCTION: acpi_ex_store_object_to_index | |
418 | * | |
419 | * PARAMETERS: *source_desc - Value to be stored | |
420 | * *dest_desc - Named object to receive the value | |
421 | * walk_state - Current walk state | |
422 | * | |
423 | * RETURN: Status | |
424 | * | |
425 | * DESCRIPTION: Store the object to indexed Buffer or Package element | |
426 | * | |
427 | ******************************************************************************/ | |
428 | ||
44f6c012 | 429 | static acpi_status |
4be44fcd LB |
430 | acpi_ex_store_object_to_index(union acpi_operand_object *source_desc, |
431 | union acpi_operand_object *index_desc, | |
432 | struct acpi_walk_state *walk_state) | |
1da177e4 | 433 | { |
4be44fcd LB |
434 | acpi_status status = AE_OK; |
435 | union acpi_operand_object *obj_desc; | |
436 | union acpi_operand_object *new_desc; | |
437 | u8 value = 0; | |
438 | u32 i; | |
1da177e4 | 439 | |
b229cf92 | 440 | ACPI_FUNCTION_TRACE(ex_store_object_to_index); |
1da177e4 LT |
441 | |
442 | /* | |
443 | * Destination must be a reference pointer, and | |
444 | * must point to either a buffer or a package | |
445 | */ | |
446 | switch (index_desc->reference.target_type) { | |
447 | case ACPI_TYPE_PACKAGE: | |
448 | /* | |
449 | * Storing to a package element. Copy the object and replace | |
450 | * any existing object with the new object. No implicit | |
451 | * conversion is performed. | |
452 | * | |
453 | * The object at *(index_desc->Reference.Where) is the | |
454 | * element within the package that is to be modified. | |
455 | * The parent package object is at index_desc->Reference.Object | |
456 | */ | |
457 | obj_desc = *(index_desc->reference.where); | |
458 | ||
bc7a36ab LM |
459 | if (ACPI_GET_OBJECT_TYPE(source_desc) == |
460 | ACPI_TYPE_LOCAL_REFERENCE | |
461 | && source_desc->reference.opcode == AML_LOAD_OP) { | |
462 | ||
463 | /* This is a DDBHandle, just add a reference to it */ | |
464 | ||
465 | acpi_ut_add_reference(source_desc); | |
466 | new_desc = source_desc; | |
467 | } else { | |
468 | /* Normal object, copy it */ | |
469 | ||
470 | status = | |
471 | acpi_ut_copy_iobject_to_iobject(source_desc, | |
472 | &new_desc, | |
473 | walk_state); | |
474 | if (ACPI_FAILURE(status)) { | |
475 | return_ACPI_STATUS(status); | |
476 | } | |
1da177e4 LT |
477 | } |
478 | ||
479 | if (obj_desc) { | |
52fc0b02 | 480 | |
1da177e4 LT |
481 | /* Decrement reference count by the ref count of the parent package */ |
482 | ||
4be44fcd LB |
483 | for (i = 0; i < ((union acpi_operand_object *) |
484 | index_desc->reference.object)->common. | |
485 | reference_count; i++) { | |
486 | acpi_ut_remove_reference(obj_desc); | |
1da177e4 LT |
487 | } |
488 | } | |
489 | ||
490 | *(index_desc->reference.where) = new_desc; | |
491 | ||
44f6c012 | 492 | /* Increment ref count by the ref count of the parent package-1 */ |
1da177e4 | 493 | |
4be44fcd LB |
494 | for (i = 1; i < ((union acpi_operand_object *) |
495 | index_desc->reference.object)->common. | |
496 | reference_count; i++) { | |
497 | acpi_ut_add_reference(new_desc); | |
1da177e4 LT |
498 | } |
499 | ||
500 | break; | |
501 | ||
1da177e4 LT |
502 | case ACPI_TYPE_BUFFER_FIELD: |
503 | ||
504 | /* | |
505 | * Store into a Buffer or String (not actually a real buffer_field) | |
506 | * at a location defined by an Index. | |
507 | * | |
508 | * The first 8-bit element of the source object is written to the | |
509 | * 8-bit Buffer location defined by the Index destination object, | |
510 | * according to the ACPI 2.0 specification. | |
511 | */ | |
512 | ||
513 | /* | |
514 | * Make sure the target is a Buffer or String. An error should | |
515 | * not happen here, since the reference_object was constructed | |
516 | * by the INDEX_OP code. | |
517 | */ | |
518 | obj_desc = index_desc->reference.object; | |
4be44fcd LB |
519 | if ((ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_BUFFER) && |
520 | (ACPI_GET_OBJECT_TYPE(obj_desc) != ACPI_TYPE_STRING)) { | |
521 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); | |
1da177e4 LT |
522 | } |
523 | ||
524 | /* | |
525 | * The assignment of the individual elements will be slightly | |
526 | * different for each source type. | |
527 | */ | |
4be44fcd | 528 | switch (ACPI_GET_OBJECT_TYPE(source_desc)) { |
1da177e4 LT |
529 | case ACPI_TYPE_INTEGER: |
530 | ||
531 | /* Use the least-significant byte of the integer */ | |
532 | ||
533 | value = (u8) (source_desc->integer.value); | |
534 | break; | |
535 | ||
536 | case ACPI_TYPE_BUFFER: | |
537 | case ACPI_TYPE_STRING: | |
538 | ||
539 | /* Note: Takes advantage of common string/buffer fields */ | |
540 | ||
541 | value = source_desc->buffer.pointer[0]; | |
542 | break; | |
543 | ||
544 | default: | |
545 | ||
546 | /* All other types are invalid */ | |
547 | ||
b8e4d893 BM |
548 | ACPI_ERROR((AE_INFO, |
549 | "Source must be Integer/Buffer/String type, not %s", | |
550 | acpi_ut_get_object_type_name(source_desc))); | |
4be44fcd | 551 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
1da177e4 LT |
552 | } |
553 | ||
554 | /* Store the source value into the target buffer byte */ | |
555 | ||
556 | obj_desc->buffer.pointer[index_desc->reference.offset] = value; | |
557 | break; | |
558 | ||
1da177e4 | 559 | default: |
b229cf92 | 560 | ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField")); |
1da177e4 LT |
561 | status = AE_AML_OPERAND_TYPE; |
562 | break; | |
563 | } | |
564 | ||
4be44fcd | 565 | return_ACPI_STATUS(status); |
1da177e4 LT |
566 | } |
567 | ||
1da177e4 LT |
568 | /******************************************************************************* |
569 | * | |
570 | * FUNCTION: acpi_ex_store_object_to_node | |
571 | * | |
572 | * PARAMETERS: source_desc - Value to be stored | |
573 | * Node - Named object to receive the value | |
574 | * walk_state - Current walk state | |
575 | * implicit_conversion - Perform implicit conversion (yes/no) | |
576 | * | |
577 | * RETURN: Status | |
578 | * | |
579 | * DESCRIPTION: Store the object to the named object. | |
580 | * | |
581 | * The Assignment of an object to a named object is handled here | |
582 | * The value passed in will replace the current value (if any) | |
583 | * with the input value. | |
584 | * | |
585 | * When storing into an object the data is converted to the | |
586 | * target object type then stored in the object. This means | |
587 | * that the target object type (for an initialized target) will | |
588 | * not be changed by a store operation. | |
589 | * | |
590 | * Assumes parameters are already validated. | |
591 | * | |
592 | ******************************************************************************/ | |
593 | ||
594 | acpi_status | |
4be44fcd LB |
595 | acpi_ex_store_object_to_node(union acpi_operand_object *source_desc, |
596 | struct acpi_namespace_node *node, | |
597 | struct acpi_walk_state *walk_state, | |
598 | u8 implicit_conversion) | |
1da177e4 | 599 | { |
4be44fcd LB |
600 | acpi_status status = AE_OK; |
601 | union acpi_operand_object *target_desc; | |
602 | union acpi_operand_object *new_desc; | |
603 | acpi_object_type target_type; | |
1da177e4 | 604 | |
b229cf92 | 605 | ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc); |
1da177e4 | 606 | |
44f6c012 RM |
607 | /* Get current type of the node, and object attached to Node */ |
608 | ||
4be44fcd LB |
609 | target_type = acpi_ns_get_type(node); |
610 | target_desc = acpi_ns_get_attached_object(node); | |
1da177e4 | 611 | |
4be44fcd LB |
612 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n", |
613 | source_desc, | |
614 | acpi_ut_get_object_type_name(source_desc), node, | |
615 | acpi_ut_get_type_name(target_type))); | |
1da177e4 LT |
616 | |
617 | /* | |
618 | * Resolve the source object to an actual value | |
619 | * (If it is a reference object) | |
620 | */ | |
4be44fcd LB |
621 | status = acpi_ex_resolve_object(&source_desc, target_type, walk_state); |
622 | if (ACPI_FAILURE(status)) { | |
623 | return_ACPI_STATUS(status); | |
1da177e4 LT |
624 | } |
625 | ||
626 | /* If no implicit conversion, drop into the default case below */ | |
627 | ||
a3df4dad LM |
628 | if ((!implicit_conversion) || |
629 | ((walk_state->opcode == AML_COPY_OP) && | |
630 | (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) && | |
631 | (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) && | |
632 | (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) { | |
633 | /* | |
634 | * Force execution of default (no implicit conversion). Note: | |
635 | * copy_object does not perform an implicit conversion, as per the ACPI | |
636 | * spec -- except in case of region/bank/index fields -- because these | |
637 | * objects must retain their original type permanently. | |
638 | */ | |
1da177e4 LT |
639 | target_type = ACPI_TYPE_ANY; |
640 | } | |
641 | ||
44f6c012 RM |
642 | /* Do the actual store operation */ |
643 | ||
1da177e4 LT |
644 | switch (target_type) { |
645 | case ACPI_TYPE_BUFFER_FIELD: | |
646 | case ACPI_TYPE_LOCAL_REGION_FIELD: | |
647 | case ACPI_TYPE_LOCAL_BANK_FIELD: | |
648 | case ACPI_TYPE_LOCAL_INDEX_FIELD: | |
649 | ||
44f6c012 RM |
650 | /* For fields, copy the source data to the target field. */ |
651 | ||
4be44fcd LB |
652 | status = acpi_ex_write_data_to_field(source_desc, target_desc, |
653 | &walk_state->result_obj); | |
1da177e4 LT |
654 | break; |
655 | ||
1da177e4 LT |
656 | case ACPI_TYPE_INTEGER: |
657 | case ACPI_TYPE_STRING: | |
658 | case ACPI_TYPE_BUFFER: | |
659 | ||
660 | /* | |
661 | * These target types are all of type Integer/String/Buffer, and | |
662 | * therefore support implicit conversion before the store. | |
663 | * | |
664 | * Copy and/or convert the source object to a new target object | |
665 | */ | |
4be44fcd LB |
666 | status = |
667 | acpi_ex_store_object_to_object(source_desc, target_desc, | |
668 | &new_desc, walk_state); | |
669 | if (ACPI_FAILURE(status)) { | |
670 | return_ACPI_STATUS(status); | |
1da177e4 LT |
671 | } |
672 | ||
673 | if (new_desc != target_desc) { | |
674 | /* | |
675 | * Store the new new_desc as the new value of the Name, and set | |
676 | * the Name's type to that of the value being stored in it. | |
677 | * source_desc reference count is incremented by attach_object. | |
678 | * | |
679 | * Note: This may change the type of the node if an explicit store | |
680 | * has been performed such that the node/object type has been | |
681 | * changed. | |
682 | */ | |
4be44fcd LB |
683 | status = |
684 | acpi_ns_attach_object(node, new_desc, | |
685 | new_desc->common.type); | |
686 | ||
687 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
688 | "Store %s into %s via Convert/Attach\n", | |
689 | acpi_ut_get_object_type_name | |
690 | (source_desc), | |
691 | acpi_ut_get_object_type_name | |
692 | (new_desc))); | |
1da177e4 LT |
693 | } |
694 | break; | |
695 | ||
1da177e4 LT |
696 | default: |
697 | ||
4be44fcd LB |
698 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
699 | "Storing %s (%p) directly into node (%p) with no implicit conversion\n", | |
700 | acpi_ut_get_object_type_name(source_desc), | |
701 | source_desc, node)); | |
1da177e4 LT |
702 | |
703 | /* No conversions for all other types. Just attach the source object */ | |
704 | ||
4be44fcd LB |
705 | status = acpi_ns_attach_object(node, source_desc, |
706 | ACPI_GET_OBJECT_TYPE | |
707 | (source_desc)); | |
1da177e4 LT |
708 | break; |
709 | } | |
710 | ||
4be44fcd | 711 | return_ACPI_STATUS(status); |
1da177e4 | 712 | } |