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1/******************************************************************************
2 *
3 * Module Name: exstore - AML Interpreter object store support
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2011, Intel Corp.
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
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acdispat.h"
47#include "acinterp.h"
48#include "amlcode.h"
49#include "acnamesp.h"
50
51#define _COMPONENT ACPI_EXECUTER
52ACPI_MODULE_NAME("exstore")
53
54/* Local prototypes */
55static acpi_status
56acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
57 union acpi_operand_object *dest_desc,
58 struct acpi_walk_state *walk_state);
59
60/*******************************************************************************
61 *
62 * FUNCTION: acpi_ex_store
63 *
64 * PARAMETERS: *source_desc - Value to be stored
65 * *dest_desc - Where to store it. Must be an NS node
66 * or a union acpi_operand_object of type
67 * Reference;
68 * walk_state - Current walk state
69 *
70 * RETURN: Status
71 *
72 * DESCRIPTION: Store the value described by source_desc into the location
73 * described by dest_desc. Called by various interpreter
74 * functions to store the result of an operation into
75 * the destination operand -- not just simply the actual "Store"
76 * ASL operator.
77 *
78 ******************************************************************************/
79
80acpi_status
81acpi_ex_store(union acpi_operand_object *source_desc,
82 union acpi_operand_object *dest_desc,
83 struct acpi_walk_state *walk_state)
84{
85 acpi_status status = AE_OK;
86 union acpi_operand_object *ref_desc = dest_desc;
87
88 ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc);
89
90 /* Validate parameters */
91
92 if (!source_desc || !dest_desc) {
93 ACPI_ERROR((AE_INFO, "Null parameter"));
94 return_ACPI_STATUS(AE_AML_NO_OPERAND);
95 }
96
97 /* dest_desc can be either a namespace node or an ACPI object */
98
99 if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
100 /*
101 * Dest is a namespace node,
102 * Storing an object into a Named node.
103 */
104 status = acpi_ex_store_object_to_node(source_desc,
105 (struct
106 acpi_namespace_node *)
107 dest_desc, walk_state,
108 ACPI_IMPLICIT_CONVERSION);
109
110 return_ACPI_STATUS(status);
111 }
112
113 /* Destination object must be a Reference or a Constant object */
114
115 switch (dest_desc->common.type) {
116 case ACPI_TYPE_LOCAL_REFERENCE:
117 break;
118
119 case ACPI_TYPE_INTEGER:
120
121 /* Allow stores to Constants -- a Noop as per ACPI spec */
122
123 if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
124 return_ACPI_STATUS(AE_OK);
125 }
126
127 /*lint -fallthrough */
128
129 default:
130
131 /* Destination is not a Reference object */
132
133 ACPI_ERROR((AE_INFO,
134 "Target is not a Reference or Constant object - %s [%p]",
135 acpi_ut_get_object_type_name(dest_desc),
136 dest_desc));
137
138 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
139 }
140
141 /*
142 * Examine the Reference class. These cases are handled:
143 *
144 * 1) Store to Name (Change the object associated with a name)
145 * 2) Store to an indexed area of a Buffer or Package
146 * 3) Store to a Method Local or Arg
147 * 4) Store to the debug object
148 */
149 switch (ref_desc->reference.class) {
150 case ACPI_REFCLASS_REFOF:
151
152 /* Storing an object into a Name "container" */
153
154 status = acpi_ex_store_object_to_node(source_desc,
155 ref_desc->reference.
156 object, walk_state,
157 ACPI_IMPLICIT_CONVERSION);
158 break;
159
160 case ACPI_REFCLASS_INDEX:
161
162 /* Storing to an Index (pointer into a packager or buffer) */
163
164 status =
165 acpi_ex_store_object_to_index(source_desc, ref_desc,
166 walk_state);
167 break;
168
169 case ACPI_REFCLASS_LOCAL:
170 case ACPI_REFCLASS_ARG:
171
172 /* Store to a method local/arg */
173
174 status =
175 acpi_ds_store_object_to_local(ref_desc->reference.class,
176 ref_desc->reference.value,
177 source_desc, walk_state);
178 break;
179
180 case ACPI_REFCLASS_DEBUG:
181
182 /*
183 * Storing to the Debug object causes the value stored to be
184 * displayed and otherwise has no effect -- see ACPI Specification
185 */
186 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
187 "**** Write to Debug Object: Object %p %s ****:\n\n",
188 source_desc,
189 acpi_ut_get_object_type_name(source_desc)));
190
191 ACPI_DEBUG_OBJECT(source_desc, 0, 0);
192 break;
193
194 default:
195
196 ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X",
197 ref_desc->reference.class));
198 ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO);
199
200 status = AE_AML_INTERNAL;
201 break;
202 }
203
204 return_ACPI_STATUS(status);
205}
206
207/*******************************************************************************
208 *
209 * FUNCTION: acpi_ex_store_object_to_index
210 *
211 * PARAMETERS: *source_desc - Value to be stored
212 * *dest_desc - Named object to receive the value
213 * walk_state - Current walk state
214 *
215 * RETURN: Status
216 *
217 * DESCRIPTION: Store the object to indexed Buffer or Package element
218 *
219 ******************************************************************************/
220
221static acpi_status
222acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
223 union acpi_operand_object *index_desc,
224 struct acpi_walk_state *walk_state)
225{
226 acpi_status status = AE_OK;
227 union acpi_operand_object *obj_desc;
228 union acpi_operand_object *new_desc;
229 u8 value = 0;
230 u32 i;
231
232 ACPI_FUNCTION_TRACE(ex_store_object_to_index);
233
234 /*
235 * Destination must be a reference pointer, and
236 * must point to either a buffer or a package
237 */
238 switch (index_desc->reference.target_type) {
239 case ACPI_TYPE_PACKAGE:
240 /*
241 * Storing to a package element. Copy the object and replace
242 * any existing object with the new object. No implicit
243 * conversion is performed.
244 *
245 * The object at *(index_desc->Reference.Where) is the
246 * element within the package that is to be modified.
247 * The parent package object is at index_desc->Reference.Object
248 */
249 obj_desc = *(index_desc->reference.where);
250
251 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE &&
252 source_desc->reference.class == ACPI_REFCLASS_TABLE) {
253
254 /* This is a DDBHandle, just add a reference to it */
255
256 acpi_ut_add_reference(source_desc);
257 new_desc = source_desc;
258 } else {
259 /* Normal object, copy it */
260
261 status =
262 acpi_ut_copy_iobject_to_iobject(source_desc,
263 &new_desc,
264 walk_state);
265 if (ACPI_FAILURE(status)) {
266 return_ACPI_STATUS(status);
267 }
268 }
269
270 if (obj_desc) {
271
272 /* Decrement reference count by the ref count of the parent package */
273
274 for (i = 0; i < ((union acpi_operand_object *)
275 index_desc->reference.object)->common.
276 reference_count; i++) {
277 acpi_ut_remove_reference(obj_desc);
278 }
279 }
280
281 *(index_desc->reference.where) = new_desc;
282
283 /* Increment ref count by the ref count of the parent package-1 */
284
285 for (i = 1; i < ((union acpi_operand_object *)
286 index_desc->reference.object)->common.
287 reference_count; i++) {
288 acpi_ut_add_reference(new_desc);
289 }
290
291 break;
292
293 case ACPI_TYPE_BUFFER_FIELD:
294
295 /*
296 * Store into a Buffer or String (not actually a real buffer_field)
297 * at a location defined by an Index.
298 *
299 * The first 8-bit element of the source object is written to the
300 * 8-bit Buffer location defined by the Index destination object,
301 * according to the ACPI 2.0 specification.
302 */
303
304 /*
305 * Make sure the target is a Buffer or String. An error should
306 * not happen here, since the reference_object was constructed
307 * by the INDEX_OP code.
308 */
309 obj_desc = index_desc->reference.object;
310 if ((obj_desc->common.type != ACPI_TYPE_BUFFER) &&
311 (obj_desc->common.type != ACPI_TYPE_STRING)) {
312 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
313 }
314
315 /*
316 * The assignment of the individual elements will be slightly
317 * different for each source type.
318 */
319 switch (source_desc->common.type) {
320 case ACPI_TYPE_INTEGER:
321
322 /* Use the least-significant byte of the integer */
323
324 value = (u8) (source_desc->integer.value);
325 break;
326
327 case ACPI_TYPE_BUFFER:
328 case ACPI_TYPE_STRING:
329
330 /* Note: Takes advantage of common string/buffer fields */
331
332 value = source_desc->buffer.pointer[0];
333 break;
334
335 default:
336
337 /* All other types are invalid */
338
339 ACPI_ERROR((AE_INFO,
340 "Source must be Integer/Buffer/String type, not %s",
341 acpi_ut_get_object_type_name(source_desc)));
342 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
343 }
344
345 /* Store the source value into the target buffer byte */
346
347 obj_desc->buffer.pointer[index_desc->reference.value] = value;
348 break;
349
350 default:
351 ACPI_ERROR((AE_INFO, "Target is not a Package or BufferField"));
352 status = AE_AML_OPERAND_TYPE;
353 break;
354 }
355
356 return_ACPI_STATUS(status);
357}
358
359/*******************************************************************************
360 *
361 * FUNCTION: acpi_ex_store_object_to_node
362 *
363 * PARAMETERS: source_desc - Value to be stored
364 * Node - Named object to receive the value
365 * walk_state - Current walk state
366 * implicit_conversion - Perform implicit conversion (yes/no)
367 *
368 * RETURN: Status
369 *
370 * DESCRIPTION: Store the object to the named object.
371 *
372 * The Assignment of an object to a named object is handled here
373 * The value passed in will replace the current value (if any)
374 * with the input value.
375 *
376 * When storing into an object the data is converted to the
377 * target object type then stored in the object. This means
378 * that the target object type (for an initialized target) will
379 * not be changed by a store operation.
380 *
381 * Assumes parameters are already validated.
382 *
383 ******************************************************************************/
384
385acpi_status
386acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
387 struct acpi_namespace_node *node,
388 struct acpi_walk_state *walk_state,
389 u8 implicit_conversion)
390{
391 acpi_status status = AE_OK;
392 union acpi_operand_object *target_desc;
393 union acpi_operand_object *new_desc;
394 acpi_object_type target_type;
395
396 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc);
397
398 /* Get current type of the node, and object attached to Node */
399
400 target_type = acpi_ns_get_type(node);
401 target_desc = acpi_ns_get_attached_object(node);
402
403 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
404 source_desc,
405 acpi_ut_get_object_type_name(source_desc), node,
406 acpi_ut_get_type_name(target_type)));
407
408 /*
409 * Resolve the source object to an actual value
410 * (If it is a reference object)
411 */
412 status = acpi_ex_resolve_object(&source_desc, target_type, walk_state);
413 if (ACPI_FAILURE(status)) {
414 return_ACPI_STATUS(status);
415 }
416
417 /* If no implicit conversion, drop into the default case below */
418
419 if ((!implicit_conversion) ||
420 ((walk_state->opcode == AML_COPY_OP) &&
421 (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) &&
422 (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) &&
423 (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) {
424 /*
425 * Force execution of default (no implicit conversion). Note:
426 * copy_object does not perform an implicit conversion, as per the ACPI
427 * spec -- except in case of region/bank/index fields -- because these
428 * objects must retain their original type permanently.
429 */
430 target_type = ACPI_TYPE_ANY;
431 }
432
433 /* Do the actual store operation */
434
435 switch (target_type) {
436 case ACPI_TYPE_BUFFER_FIELD:
437 case ACPI_TYPE_LOCAL_REGION_FIELD:
438 case ACPI_TYPE_LOCAL_BANK_FIELD:
439 case ACPI_TYPE_LOCAL_INDEX_FIELD:
440
441 /* For fields, copy the source data to the target field. */
442
443 status = acpi_ex_write_data_to_field(source_desc, target_desc,
444 &walk_state->result_obj);
445 break;
446
447 case ACPI_TYPE_INTEGER:
448 case ACPI_TYPE_STRING:
449 case ACPI_TYPE_BUFFER:
450
451 /*
452 * These target types are all of type Integer/String/Buffer, and
453 * therefore support implicit conversion before the store.
454 *
455 * Copy and/or convert the source object to a new target object
456 */
457 status =
458 acpi_ex_store_object_to_object(source_desc, target_desc,
459 &new_desc, walk_state);
460 if (ACPI_FAILURE(status)) {
461 return_ACPI_STATUS(status);
462 }
463
464 if (new_desc != target_desc) {
465 /*
466 * Store the new new_desc as the new value of the Name, and set
467 * the Name's type to that of the value being stored in it.
468 * source_desc reference count is incremented by attach_object.
469 *
470 * Note: This may change the type of the node if an explicit store
471 * has been performed such that the node/object type has been
472 * changed.
473 */
474 status =
475 acpi_ns_attach_object(node, new_desc,
476 new_desc->common.type);
477
478 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
479 "Store %s into %s via Convert/Attach\n",
480 acpi_ut_get_object_type_name
481 (source_desc),
482 acpi_ut_get_object_type_name
483 (new_desc)));
484 }
485 break;
486
487 default:
488
489 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
490 "Storing %s (%p) directly into node (%p) with no implicit conversion\n",
491 acpi_ut_get_object_type_name(source_desc),
492 source_desc, node));
493
494 /* No conversions for all other types. Just attach the source object */
495
496 status = acpi_ns_attach_object(node, source_desc,
497 source_desc->common.type);
498 break;
499 }
500
501 return_ACPI_STATUS(status);
502}
1/******************************************************************************
2 *
3 * Module Name: exstore - AML Interpreter object store support
4 *
5 *****************************************************************************/
6
7/*
8 * Copyright (C) 2000 - 2016, Intel Corp.
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
44#include <acpi/acpi.h>
45#include "accommon.h"
46#include "acdispat.h"
47#include "acinterp.h"
48#include "amlcode.h"
49#include "acnamesp.h"
50
51#define _COMPONENT ACPI_EXECUTER
52ACPI_MODULE_NAME("exstore")
53
54/* Local prototypes */
55static acpi_status
56acpi_ex_store_object_to_index(union acpi_operand_object *val_desc,
57 union acpi_operand_object *dest_desc,
58 struct acpi_walk_state *walk_state);
59
60static acpi_status
61acpi_ex_store_direct_to_node(union acpi_operand_object *source_desc,
62 struct acpi_namespace_node *node,
63 struct acpi_walk_state *walk_state);
64
65/*******************************************************************************
66 *
67 * FUNCTION: acpi_ex_store
68 *
69 * PARAMETERS: *source_desc - Value to be stored
70 * *dest_desc - Where to store it. Must be an NS node
71 * or union acpi_operand_object of type
72 * Reference;
73 * walk_state - Current walk state
74 *
75 * RETURN: Status
76 *
77 * DESCRIPTION: Store the value described by source_desc into the location
78 * described by dest_desc. Called by various interpreter
79 * functions to store the result of an operation into
80 * the destination operand -- not just simply the actual "Store"
81 * ASL operator.
82 *
83 ******************************************************************************/
84
85acpi_status
86acpi_ex_store(union acpi_operand_object *source_desc,
87 union acpi_operand_object *dest_desc,
88 struct acpi_walk_state *walk_state)
89{
90 acpi_status status = AE_OK;
91 union acpi_operand_object *ref_desc = dest_desc;
92
93 ACPI_FUNCTION_TRACE_PTR(ex_store, dest_desc);
94
95 /* Validate parameters */
96
97 if (!source_desc || !dest_desc) {
98 ACPI_ERROR((AE_INFO, "Null parameter"));
99 return_ACPI_STATUS(AE_AML_NO_OPERAND);
100 }
101
102 /* dest_desc can be either a namespace node or an ACPI object */
103
104 if (ACPI_GET_DESCRIPTOR_TYPE(dest_desc) == ACPI_DESC_TYPE_NAMED) {
105 /*
106 * Dest is a namespace node,
107 * Storing an object into a Named node.
108 */
109 status = acpi_ex_store_object_to_node(source_desc,
110 (struct
111 acpi_namespace_node *)
112 dest_desc, walk_state,
113 ACPI_IMPLICIT_CONVERSION);
114
115 return_ACPI_STATUS(status);
116 }
117
118 /* Destination object must be a Reference or a Constant object */
119
120 switch (dest_desc->common.type) {
121 case ACPI_TYPE_LOCAL_REFERENCE:
122
123 break;
124
125 case ACPI_TYPE_INTEGER:
126
127 /* Allow stores to Constants -- a Noop as per ACPI spec */
128
129 if (dest_desc->common.flags & AOPOBJ_AML_CONSTANT) {
130 return_ACPI_STATUS(AE_OK);
131 }
132
133 /*lint -fallthrough */
134
135 default:
136
137 /* Destination is not a Reference object */
138
139 ACPI_ERROR((AE_INFO,
140 "Target is not a Reference or Constant object - [%s] %p",
141 acpi_ut_get_object_type_name(dest_desc),
142 dest_desc));
143
144 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
145 }
146
147 /*
148 * Examine the Reference class. These cases are handled:
149 *
150 * 1) Store to Name (Change the object associated with a name)
151 * 2) Store to an indexed area of a Buffer or Package
152 * 3) Store to a Method Local or Arg
153 * 4) Store to the debug object
154 */
155 switch (ref_desc->reference.class) {
156 case ACPI_REFCLASS_REFOF:
157
158 /* Storing an object into a Name "container" */
159
160 status = acpi_ex_store_object_to_node(source_desc,
161 ref_desc->reference.
162 object, walk_state,
163 ACPI_IMPLICIT_CONVERSION);
164 break;
165
166 case ACPI_REFCLASS_INDEX:
167
168 /* Storing to an Index (pointer into a packager or buffer) */
169
170 status =
171 acpi_ex_store_object_to_index(source_desc, ref_desc,
172 walk_state);
173 break;
174
175 case ACPI_REFCLASS_LOCAL:
176 case ACPI_REFCLASS_ARG:
177
178 /* Store to a method local/arg */
179
180 status =
181 acpi_ds_store_object_to_local(ref_desc->reference.class,
182 ref_desc->reference.value,
183 source_desc, walk_state);
184 break;
185
186 case ACPI_REFCLASS_DEBUG:
187 /*
188 * Storing to the Debug object causes the value stored to be
189 * displayed and otherwise has no effect -- see ACPI Specification
190 */
191 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
192 "**** Write to Debug Object: Object %p [%s] ****:\n\n",
193 source_desc,
194 acpi_ut_get_object_type_name(source_desc)));
195
196 ACPI_DEBUG_OBJECT(source_desc, 0, 0);
197 break;
198
199 default:
200
201 ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X",
202 ref_desc->reference.class));
203 ACPI_DUMP_ENTRY(ref_desc, ACPI_LV_INFO);
204
205 status = AE_AML_INTERNAL;
206 break;
207 }
208
209 return_ACPI_STATUS(status);
210}
211
212/*******************************************************************************
213 *
214 * FUNCTION: acpi_ex_store_object_to_index
215 *
216 * PARAMETERS: *source_desc - Value to be stored
217 * *dest_desc - Named object to receive the value
218 * walk_state - Current walk state
219 *
220 * RETURN: Status
221 *
222 * DESCRIPTION: Store the object to indexed Buffer or Package element
223 *
224 ******************************************************************************/
225
226static acpi_status
227acpi_ex_store_object_to_index(union acpi_operand_object *source_desc,
228 union acpi_operand_object *index_desc,
229 struct acpi_walk_state *walk_state)
230{
231 acpi_status status = AE_OK;
232 union acpi_operand_object *obj_desc;
233 union acpi_operand_object *new_desc;
234 u8 value = 0;
235 u32 i;
236
237 ACPI_FUNCTION_TRACE(ex_store_object_to_index);
238
239 /*
240 * Destination must be a reference pointer, and
241 * must point to either a buffer or a package
242 */
243 switch (index_desc->reference.target_type) {
244 case ACPI_TYPE_PACKAGE:
245 /*
246 * Storing to a package element. Copy the object and replace
247 * any existing object with the new object. No implicit
248 * conversion is performed.
249 *
250 * The object at *(index_desc->Reference.Where) is the
251 * element within the package that is to be modified.
252 * The parent package object is at index_desc->Reference.Object
253 */
254 obj_desc = *(index_desc->reference.where);
255
256 if (source_desc->common.type == ACPI_TYPE_LOCAL_REFERENCE &&
257 source_desc->reference.class == ACPI_REFCLASS_TABLE) {
258
259 /* This is a DDBHandle, just add a reference to it */
260
261 acpi_ut_add_reference(source_desc);
262 new_desc = source_desc;
263 } else {
264 /* Normal object, copy it */
265
266 status =
267 acpi_ut_copy_iobject_to_iobject(source_desc,
268 &new_desc,
269 walk_state);
270 if (ACPI_FAILURE(status)) {
271 return_ACPI_STATUS(status);
272 }
273 }
274
275 if (obj_desc) {
276
277 /* Decrement reference count by the ref count of the parent package */
278
279 for (i = 0; i < ((union acpi_operand_object *)
280 index_desc->reference.object)->common.
281 reference_count; i++) {
282 acpi_ut_remove_reference(obj_desc);
283 }
284 }
285
286 *(index_desc->reference.where) = new_desc;
287
288 /* Increment ref count by the ref count of the parent package-1 */
289
290 for (i = 1; i < ((union acpi_operand_object *)
291 index_desc->reference.object)->common.
292 reference_count; i++) {
293 acpi_ut_add_reference(new_desc);
294 }
295
296 break;
297
298 case ACPI_TYPE_BUFFER_FIELD:
299 /*
300 * Store into a Buffer or String (not actually a real buffer_field)
301 * at a location defined by an Index.
302 *
303 * The first 8-bit element of the source object is written to the
304 * 8-bit Buffer location defined by the Index destination object,
305 * according to the ACPI 2.0 specification.
306 */
307
308 /*
309 * Make sure the target is a Buffer or String. An error should
310 * not happen here, since the reference_object was constructed
311 * by the INDEX_OP code.
312 */
313 obj_desc = index_desc->reference.object;
314 if ((obj_desc->common.type != ACPI_TYPE_BUFFER) &&
315 (obj_desc->common.type != ACPI_TYPE_STRING)) {
316 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
317 }
318
319 /*
320 * The assignment of the individual elements will be slightly
321 * different for each source type.
322 */
323 switch (source_desc->common.type) {
324 case ACPI_TYPE_INTEGER:
325
326 /* Use the least-significant byte of the integer */
327
328 value = (u8) (source_desc->integer.value);
329 break;
330
331 case ACPI_TYPE_BUFFER:
332 case ACPI_TYPE_STRING:
333
334 /* Note: Takes advantage of common string/buffer fields */
335
336 value = source_desc->buffer.pointer[0];
337 break;
338
339 default:
340
341 /* All other types are invalid */
342
343 ACPI_ERROR((AE_INFO,
344 "Source must be type [Integer/Buffer/String], found [%s]",
345 acpi_ut_get_object_type_name(source_desc)));
346 return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
347 }
348
349 /* Store the source value into the target buffer byte */
350
351 obj_desc->buffer.pointer[index_desc->reference.value] = value;
352 break;
353
354 default:
355 ACPI_ERROR((AE_INFO,
356 "Target is not of type [Package/BufferField]"));
357 status = AE_AML_TARGET_TYPE;
358 break;
359 }
360
361 return_ACPI_STATUS(status);
362}
363
364/*******************************************************************************
365 *
366 * FUNCTION: acpi_ex_store_object_to_node
367 *
368 * PARAMETERS: source_desc - Value to be stored
369 * node - Named object to receive the value
370 * walk_state - Current walk state
371 * implicit_conversion - Perform implicit conversion (yes/no)
372 *
373 * RETURN: Status
374 *
375 * DESCRIPTION: Store the object to the named object.
376 *
377 * The assignment of an object to a named object is handled here.
378 * The value passed in will replace the current value (if any)
379 * with the input value.
380 *
381 * When storing into an object the data is converted to the
382 * target object type then stored in the object. This means
383 * that the target object type (for an initialized target) will
384 * not be changed by a store operation. A copy_object can change
385 * the target type, however.
386 *
387 * The implicit_conversion flag is set to NO/FALSE only when
388 * storing to an arg_x -- as per the rules of the ACPI spec.
389 *
390 * Assumes parameters are already validated.
391 *
392 ******************************************************************************/
393
394acpi_status
395acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
396 struct acpi_namespace_node *node,
397 struct acpi_walk_state *walk_state,
398 u8 implicit_conversion)
399{
400 acpi_status status = AE_OK;
401 union acpi_operand_object *target_desc;
402 union acpi_operand_object *new_desc;
403 acpi_object_type target_type;
404
405 ACPI_FUNCTION_TRACE_PTR(ex_store_object_to_node, source_desc);
406
407 /* Get current type of the node, and object attached to Node */
408
409 target_type = acpi_ns_get_type(node);
410 target_desc = acpi_ns_get_attached_object(node);
411
412 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Storing %p [%s] to node %p [%s]\n",
413 source_desc,
414 acpi_ut_get_object_type_name(source_desc), node,
415 acpi_ut_get_type_name(target_type)));
416
417 /* Only limited target types possible for everything except copy_object */
418
419 if (walk_state->opcode != AML_COPY_OP) {
420 /*
421 * Only copy_object allows all object types to be overwritten. For
422 * target_ref(s), there are restrictions on the object types that
423 * are allowed.
424 *
425 * Allowable operations/typing for Store:
426 *
427 * 1) Simple Store
428 * Integer --> Integer (Named/Local/Arg)
429 * String --> String (Named/Local/Arg)
430 * Buffer --> Buffer (Named/Local/Arg)
431 * Package --> Package (Named/Local/Arg)
432 *
433 * 2) Store with implicit conversion
434 * Integer --> String or Buffer (Named)
435 * String --> Integer or Buffer (Named)
436 * Buffer --> Integer or String (Named)
437 */
438 switch (target_type) {
439 case ACPI_TYPE_PACKAGE:
440 /*
441 * Here, can only store a package to an existing package.
442 * Storing a package to a Local/Arg is OK, and handled
443 * elsewhere.
444 */
445 if (walk_state->opcode == AML_STORE_OP) {
446 if (source_desc->common.type !=
447 ACPI_TYPE_PACKAGE) {
448 ACPI_ERROR((AE_INFO,
449 "Cannot assign type [%s] to [Package] "
450 "(source must be type Pkg)",
451 acpi_ut_get_object_type_name
452 (source_desc)));
453
454 return_ACPI_STATUS(AE_AML_TARGET_TYPE);
455 }
456 break;
457 }
458
459 /* Fallthrough */
460
461 case ACPI_TYPE_DEVICE:
462 case ACPI_TYPE_EVENT:
463 case ACPI_TYPE_MUTEX:
464 case ACPI_TYPE_REGION:
465 case ACPI_TYPE_POWER:
466 case ACPI_TYPE_PROCESSOR:
467 case ACPI_TYPE_THERMAL:
468
469 ACPI_ERROR((AE_INFO,
470 "Target must be [Buffer/Integer/String/Reference]"
471 ", found [%s] (%4.4s)",
472 acpi_ut_get_type_name(node->type),
473 node->name.ascii));
474
475 return_ACPI_STATUS(AE_AML_TARGET_TYPE);
476
477 default:
478 break;
479 }
480 }
481
482 /*
483 * Resolve the source object to an actual value
484 * (If it is a reference object)
485 */
486 status = acpi_ex_resolve_object(&source_desc, target_type, walk_state);
487 if (ACPI_FAILURE(status)) {
488 return_ACPI_STATUS(status);
489 }
490
491 /* Do the actual store operation */
492
493 switch (target_type) {
494 /*
495 * The simple data types all support implicit source operand
496 * conversion before the store.
497 */
498 case ACPI_TYPE_INTEGER:
499 case ACPI_TYPE_STRING:
500 case ACPI_TYPE_BUFFER:
501
502 if ((walk_state->opcode == AML_COPY_OP) || !implicit_conversion) {
503 /*
504 * However, copy_object and Stores to arg_x do not perform
505 * an implicit conversion, as per the ACPI specification.
506 * A direct store is performed instead.
507 */
508 status =
509 acpi_ex_store_direct_to_node(source_desc, node,
510 walk_state);
511 break;
512 }
513
514 /* Store with implicit source operand conversion support */
515
516 status =
517 acpi_ex_store_object_to_object(source_desc, target_desc,
518 &new_desc, walk_state);
519 if (ACPI_FAILURE(status)) {
520 return_ACPI_STATUS(status);
521 }
522
523 if (new_desc != target_desc) {
524 /*
525 * Store the new new_desc as the new value of the Name, and set
526 * the Name's type to that of the value being stored in it.
527 * source_desc reference count is incremented by attach_object.
528 *
529 * Note: This may change the type of the node if an explicit
530 * store has been performed such that the node/object type
531 * has been changed.
532 */
533 status =
534 acpi_ns_attach_object(node, new_desc,
535 new_desc->common.type);
536
537 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
538 "Store type [%s] into [%s] via Convert/Attach\n",
539 acpi_ut_get_object_type_name
540 (source_desc),
541 acpi_ut_get_object_type_name
542 (new_desc)));
543 }
544 break;
545
546 case ACPI_TYPE_BUFFER_FIELD:
547 case ACPI_TYPE_LOCAL_REGION_FIELD:
548 case ACPI_TYPE_LOCAL_BANK_FIELD:
549 case ACPI_TYPE_LOCAL_INDEX_FIELD:
550 /*
551 * For all fields, always write the source data to the target
552 * field. Any required implicit source operand conversion is
553 * performed in the function below as necessary. Note, field
554 * objects must retain their original type permanently.
555 */
556 status = acpi_ex_write_data_to_field(source_desc, target_desc,
557 &walk_state->result_obj);
558 break;
559
560 default:
561 /*
562 * copy_object operator: No conversions for all other types.
563 * Instead, directly store a copy of the source object.
564 *
565 * This is the ACPI spec-defined behavior for the copy_object
566 * operator. (Note, for this default case, all normal
567 * Store/Target operations exited above with an error).
568 */
569 status =
570 acpi_ex_store_direct_to_node(source_desc, node, walk_state);
571 break;
572 }
573
574 return_ACPI_STATUS(status);
575}
576
577/*******************************************************************************
578 *
579 * FUNCTION: acpi_ex_store_direct_to_node
580 *
581 * PARAMETERS: source_desc - Value to be stored
582 * node - Named object to receive the value
583 * walk_state - Current walk state
584 *
585 * RETURN: Status
586 *
587 * DESCRIPTION: "Store" an object directly to a node. This involves a copy
588 * and an attach.
589 *
590 ******************************************************************************/
591
592static acpi_status
593acpi_ex_store_direct_to_node(union acpi_operand_object *source_desc,
594 struct acpi_namespace_node *node,
595 struct acpi_walk_state *walk_state)
596{
597 acpi_status status;
598 union acpi_operand_object *new_desc;
599
600 ACPI_FUNCTION_TRACE(ex_store_direct_to_node);
601
602 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
603 "Storing [%s] (%p) directly into node [%s] (%p)"
604 " with no implicit conversion\n",
605 acpi_ut_get_object_type_name(source_desc),
606 source_desc, acpi_ut_get_type_name(node->type),
607 node));
608
609 /* Copy the source object to a new object */
610
611 status =
612 acpi_ut_copy_iobject_to_iobject(source_desc, &new_desc, walk_state);
613 if (ACPI_FAILURE(status)) {
614 return_ACPI_STATUS(status);
615 }
616
617 /* Attach the new object to the node */
618
619 status = acpi_ns_attach_object(node, new_desc, new_desc->common.type);
620 acpi_ut_remove_reference(new_desc);
621 return_ACPI_STATUS(status);
622}