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1 : : // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
2 : : /******************************************************************************
3 : : *
4 : : * Module Name: exprep - ACPI AML field prep utilities
5 : : *
6 : : * Copyright (C) 2000 - 2020, Intel Corp.
7 : : *
8 : : *****************************************************************************/
9 : :
10 : : #include <acpi/acpi.h>
11 : : #include "accommon.h"
12 : : #include "acinterp.h"
13 : : #include "amlcode.h"
14 : : #include "acnamesp.h"
15 : : #include "acdispat.h"
16 : :
17 : : #define _COMPONENT ACPI_EXECUTER
18 : : ACPI_MODULE_NAME("exprep")
19 : :
20 : : /* Local prototypes */
21 : : static u32
22 : : acpi_ex_decode_field_access(union acpi_operand_object *obj_desc,
23 : : u8 field_flags, u32 * return_byte_alignment);
24 : :
25 : : #ifdef ACPI_UNDER_DEVELOPMENT
26 : :
27 : : static u32
28 : : acpi_ex_generate_access(u32 field_bit_offset,
29 : : u32 field_bit_length, u32 region_length);
30 : :
31 : : /*******************************************************************************
32 : : *
33 : : * FUNCTION: acpi_ex_generate_access
34 : : *
35 : : * PARAMETERS: field_bit_offset - Start of field within parent region/buffer
36 : : * field_bit_length - Length of field in bits
37 : : * region_length - Length of parent in bytes
38 : : *
39 : : * RETURN: Field granularity (8, 16, 32 or 64) and
40 : : * byte_alignment (1, 2, 3, or 4)
41 : : *
42 : : * DESCRIPTION: Generate an optimal access width for fields defined with the
43 : : * any_acc keyword.
44 : : *
45 : : * NOTE: Need to have the region_length in order to check for boundary
46 : : * conditions (end-of-region). However, the region_length is a deferred
47 : : * operation. Therefore, to complete this implementation, the generation
48 : : * of this access width must be deferred until the region length has
49 : : * been evaluated.
50 : : *
51 : : ******************************************************************************/
52 : :
53 : : static u32
54 : : acpi_ex_generate_access(u32 field_bit_offset,
55 : : u32 field_bit_length, u32 region_length)
56 : : {
57 : : u32 field_byte_length;
58 : : u32 field_byte_offset;
59 : : u32 field_byte_end_offset;
60 : : u32 access_byte_width;
61 : : u32 field_start_offset;
62 : : u32 field_end_offset;
63 : : u32 minimum_access_width = 0xFFFFFFFF;
64 : : u32 minimum_accesses = 0xFFFFFFFF;
65 : : u32 accesses;
66 : :
67 : : ACPI_FUNCTION_TRACE(ex_generate_access);
68 : :
69 : : /* Round Field start offset and length to "minimal" byte boundaries */
70 : :
71 : : field_byte_offset = ACPI_DIV_8(ACPI_ROUND_DOWN(field_bit_offset, 8));
72 : :
73 : : field_byte_end_offset =
74 : : ACPI_DIV_8(ACPI_ROUND_UP(field_bit_length + field_bit_offset, 8));
75 : :
76 : : field_byte_length = field_byte_end_offset - field_byte_offset;
77 : :
78 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
79 : : "Bit length %u, Bit offset %u\n",
80 : : field_bit_length, field_bit_offset));
81 : :
82 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
83 : : "Byte Length %u, Byte Offset %u, End Offset %u\n",
84 : : field_byte_length, field_byte_offset,
85 : : field_byte_end_offset));
86 : :
87 : : /*
88 : : * Iterative search for the maximum access width that is both aligned
89 : : * and does not go beyond the end of the region
90 : : *
91 : : * Start at byte_acc and work upwards to qword_acc max. (1,2,4,8 bytes)
92 : : */
93 : : for (access_byte_width = 1; access_byte_width <= 8;
94 : : access_byte_width <<= 1) {
95 : : /*
96 : : * 1) Round end offset up to next access boundary and make sure that
97 : : * this does not go beyond the end of the parent region.
98 : : * 2) When the Access width is greater than the field_byte_length, we
99 : : * are done. (This does not optimize for the perfectly aligned
100 : : * case yet).
101 : : */
102 : : if (ACPI_ROUND_UP(field_byte_end_offset, access_byte_width) <=
103 : : region_length) {
104 : : field_start_offset =
105 : : ACPI_ROUND_DOWN(field_byte_offset,
106 : : access_byte_width) /
107 : : access_byte_width;
108 : :
109 : : field_end_offset =
110 : : ACPI_ROUND_UP((field_byte_length +
111 : : field_byte_offset),
112 : : access_byte_width) /
113 : : access_byte_width;
114 : :
115 : : accesses = field_end_offset - field_start_offset;
116 : :
117 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
118 : : "AccessWidth %u end is within region\n",
119 : : access_byte_width));
120 : :
121 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
122 : : "Field Start %u, Field End %u -- requires %u accesses\n",
123 : : field_start_offset, field_end_offset,
124 : : accesses));
125 : :
126 : : /* Single access is optimal */
127 : :
128 : : if (accesses <= 1) {
129 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
130 : : "Entire field can be accessed "
131 : : "with one operation of size %u\n",
132 : : access_byte_width));
133 : : return_VALUE(access_byte_width);
134 : : }
135 : :
136 : : /*
137 : : * Fits in the region, but requires more than one read/write.
138 : : * try the next wider access on next iteration
139 : : */
140 : : if (accesses < minimum_accesses) {
141 : : minimum_accesses = accesses;
142 : : minimum_access_width = access_byte_width;
143 : : }
144 : : } else {
145 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
146 : : "AccessWidth %u end is NOT within region\n",
147 : : access_byte_width));
148 : : if (access_byte_width == 1) {
149 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
150 : : "Field goes beyond end-of-region!\n"));
151 : :
152 : : /* Field does not fit in the region at all */
153 : :
154 : : return_VALUE(0);
155 : : }
156 : :
157 : : /*
158 : : * This width goes beyond the end-of-region, back off to
159 : : * previous access
160 : : */
161 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
162 : : "Backing off to previous optimal access width of %u\n",
163 : : minimum_access_width));
164 : : return_VALUE(minimum_access_width);
165 : : }
166 : : }
167 : :
168 : : /*
169 : : * Could not read/write field with one operation,
170 : : * just use max access width
171 : : */
172 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
173 : : "Cannot access field in one operation, using width 8\n"));
174 : :
175 : : return_VALUE(8);
176 : : }
177 : : #endif /* ACPI_UNDER_DEVELOPMENT */
178 : :
179 : : /*******************************************************************************
180 : : *
181 : : * FUNCTION: acpi_ex_decode_field_access
182 : : *
183 : : * PARAMETERS: obj_desc - Field object
184 : : * field_flags - Encoded fieldflags (contains access bits)
185 : : * return_byte_alignment - Where the byte alignment is returned
186 : : *
187 : : * RETURN: Field granularity (8, 16, 32 or 64) and
188 : : * byte_alignment (1, 2, 3, or 4)
189 : : *
190 : : * DESCRIPTION: Decode the access_type bits of a field definition.
191 : : *
192 : : ******************************************************************************/
193 : :
194 : : static u32
195 : 341 : acpi_ex_decode_field_access(union acpi_operand_object *obj_desc,
196 : : u8 field_flags, u32 * return_byte_alignment)
197 : : {
198 : 341 : u32 access;
199 : 341 : u32 byte_alignment;
200 : 341 : u32 bit_length;
201 : :
202 : 341 : ACPI_FUNCTION_TRACE(ex_decode_field_access);
203 : :
204 : 341 : access = (field_flags & AML_FIELD_ACCESS_TYPE_MASK);
205 : :
206 [ + - ]: 341 : switch (access) {
207 : : case AML_FIELD_ACCESS_ANY:
208 : :
209 : : #ifdef ACPI_UNDER_DEVELOPMENT
210 : : byte_alignment =
211 : : acpi_ex_generate_access(obj_desc->common_field.
212 : : start_field_bit_offset,
213 : : obj_desc->common_field.bit_length,
214 : : 0xFFFFFFFF
215 : : /* Temp until we pass region_length as parameter */
216 : : );
217 : : bit_length = byte_alignment * 8;
218 : : #endif
219 : :
220 : : byte_alignment = 1;
221 : : bit_length = 8;
222 : : break;
223 : :
224 : : case AML_FIELD_ACCESS_BYTE:
225 : : case AML_FIELD_ACCESS_BUFFER: /* ACPI 2.0 (SMBus Buffer) */
226 : :
227 : : byte_alignment = 1;
228 : : bit_length = 8;
229 : : break;
230 : :
231 : : case AML_FIELD_ACCESS_WORD:
232 : :
233 : : byte_alignment = 2;
234 : : bit_length = 16;
235 : : break;
236 : :
237 : : case AML_FIELD_ACCESS_DWORD:
238 : :
239 : : byte_alignment = 4;
240 : : bit_length = 32;
241 : : break;
242 : :
243 : : case AML_FIELD_ACCESS_QWORD: /* ACPI 2.0 */
244 : :
245 : : byte_alignment = 8;
246 : : bit_length = 64;
247 : : break;
248 : :
249 : 0 : default:
250 : :
251 : : /* Invalid field access type */
252 : :
253 : 0 : ACPI_ERROR((AE_INFO, "Unknown field access type 0x%X", access));
254 : :
255 : 0 : return_UINT32(0);
256 : : }
257 : :
258 [ + + ]: 341 : if (obj_desc->common.type == ACPI_TYPE_BUFFER_FIELD) {
259 : : /*
260 : : * buffer_field access can be on any byte boundary, so the
261 : : * byte_alignment is always 1 byte -- regardless of any byte_alignment
262 : : * implied by the field access type.
263 : : */
264 : 110 : byte_alignment = 1;
265 : : }
266 : :
267 : 341 : *return_byte_alignment = byte_alignment;
268 : 341 : return_UINT32(bit_length);
269 : : }
270 : :
271 : : /*******************************************************************************
272 : : *
273 : : * FUNCTION: acpi_ex_prep_common_field_object
274 : : *
275 : : * PARAMETERS: obj_desc - The field object
276 : : * field_flags - Access, lock_rule, and update_rule.
277 : : * The format of a field_flag is described
278 : : * in the ACPI specification
279 : : * field_attribute - Special attributes (not used)
280 : : * field_bit_position - Field start position
281 : : * field_bit_length - Field length in number of bits
282 : : *
283 : : * RETURN: Status
284 : : *
285 : : * DESCRIPTION: Initialize the areas of the field object that are common
286 : : * to the various types of fields. Note: This is very "sensitive"
287 : : * code because we are solving the general case for field
288 : : * alignment.
289 : : *
290 : : ******************************************************************************/
291 : :
292 : : acpi_status
293 : 341 : acpi_ex_prep_common_field_object(union acpi_operand_object *obj_desc,
294 : : u8 field_flags,
295 : : u8 field_attribute,
296 : : u32 field_bit_position, u32 field_bit_length)
297 : : {
298 : 341 : u32 access_bit_width;
299 : 341 : u32 byte_alignment;
300 : 341 : u32 nearest_byte_address;
301 : :
302 : 341 : ACPI_FUNCTION_TRACE(ex_prep_common_field_object);
303 : :
304 : : /*
305 : : * Note: the structure being initialized is the
306 : : * ACPI_COMMON_FIELD_INFO; No structure fields outside of the common
307 : : * area are initialized by this procedure.
308 : : */
309 : 341 : obj_desc->common_field.field_flags = field_flags;
310 : 341 : obj_desc->common_field.attribute = field_attribute;
311 : 341 : obj_desc->common_field.bit_length = field_bit_length;
312 : :
313 : : /*
314 : : * Decode the access type so we can compute offsets. The access type gives
315 : : * two pieces of information - the width of each field access and the
316 : : * necessary byte_alignment (address granularity) of the access.
317 : : *
318 : : * For any_acc, the access_bit_width is the largest width that is both
319 : : * necessary and possible in an attempt to access the whole field in one
320 : : * I/O operation. However, for any_acc, the byte_alignment is always one
321 : : * byte.
322 : : *
323 : : * For all Buffer Fields, the byte_alignment is always one byte.
324 : : *
325 : : * For all other access types (Byte, Word, Dword, Qword), the Bitwidth is
326 : : * the same (equivalent) as the byte_alignment.
327 : : */
328 : 341 : access_bit_width =
329 : 341 : acpi_ex_decode_field_access(obj_desc, field_flags, &byte_alignment);
330 [ + - ]: 341 : if (!access_bit_width) {
331 : : return_ACPI_STATUS(AE_AML_OPERAND_VALUE);
332 : : }
333 : :
334 : : /* Setup width (access granularity) fields (values are: 1, 2, 4, 8) */
335 : :
336 : 341 : obj_desc->common_field.access_byte_width = (u8)
337 : 341 : ACPI_DIV_8(access_bit_width);
338 : :
339 : : /*
340 : : * base_byte_offset is the address of the start of the field within the
341 : : * region. It is the byte address of the first *datum* (field-width data
342 : : * unit) of the field. (i.e., the first datum that contains at least the
343 : : * first *bit* of the field.)
344 : : *
345 : : * Note: byte_alignment is always either equal to the access_bit_width or 8
346 : : * (Byte access), and it defines the addressing granularity of the parent
347 : : * region or buffer.
348 : : */
349 : 341 : nearest_byte_address =
350 : : ACPI_ROUND_BITS_DOWN_TO_BYTES(field_bit_position);
351 : 341 : obj_desc->common_field.base_byte_offset = (u32)
352 : : ACPI_ROUND_DOWN(nearest_byte_address, byte_alignment);
353 : :
354 : : /*
355 : : * start_field_bit_offset is the offset of the first bit of the field within
356 : : * a field datum.
357 : : */
358 : 341 : obj_desc->common_field.start_field_bit_offset = (u8)
359 : : (field_bit_position -
360 : 341 : ACPI_MUL_8(obj_desc->common_field.base_byte_offset));
361 : :
362 : 341 : return_ACPI_STATUS(AE_OK);
363 : : }
364 : :
365 : : /*******************************************************************************
366 : : *
367 : : * FUNCTION: acpi_ex_prep_field_value
368 : : *
369 : : * PARAMETERS: info - Contains all field creation info
370 : : *
371 : : * RETURN: Status
372 : : *
373 : : * DESCRIPTION: Construct an object of type union acpi_operand_object with a
374 : : * subtype of def_field and connect it to the parent Node.
375 : : *
376 : : ******************************************************************************/
377 : :
378 : 231 : acpi_status acpi_ex_prep_field_value(struct acpi_create_field_info *info)
379 : : {
380 : 231 : union acpi_operand_object *obj_desc;
381 : 231 : union acpi_operand_object *second_desc = NULL;
382 : 231 : acpi_status status;
383 : 231 : u32 access_byte_width;
384 : 231 : u32 type;
385 : :
386 : 231 : ACPI_FUNCTION_TRACE(ex_prep_field_value);
387 : :
388 : : /* Parameter validation */
389 : :
390 [ + - ]: 231 : if (info->field_type != ACPI_TYPE_LOCAL_INDEX_FIELD) {
391 [ - + ]: 231 : if (!info->region_node) {
392 : 0 : ACPI_ERROR((AE_INFO, "Null RegionNode"));
393 : 0 : return_ACPI_STATUS(AE_AML_NO_OPERAND);
394 : : }
395 : :
396 : 231 : type = acpi_ns_get_type(info->region_node);
397 [ - + ]: 231 : if (type != ACPI_TYPE_REGION) {
398 : 0 : ACPI_ERROR((AE_INFO,
399 : : "Needed Region, found type 0x%X (%s)", type,
400 : : acpi_ut_get_type_name(type)));
401 : :
402 : 0 : return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
403 : : }
404 : : }
405 : :
406 : : /* Allocate a new field object */
407 : :
408 : 231 : obj_desc = acpi_ut_create_internal_object(info->field_type);
409 [ + - ]: 231 : if (!obj_desc) {
410 : : return_ACPI_STATUS(AE_NO_MEMORY);
411 : : }
412 : :
413 : : /* Initialize areas of the object that are common to all fields */
414 : :
415 : 231 : obj_desc->common_field.node = info->field_node;
416 : 231 : status = acpi_ex_prep_common_field_object(obj_desc,
417 : 231 : info->field_flags,
418 : 231 : info->attribute,
419 : : info->field_bit_position,
420 : : info->field_bit_length);
421 [ - + ]: 231 : if (ACPI_FAILURE(status)) {
422 : 0 : acpi_ut_delete_object_desc(obj_desc);
423 : 0 : return_ACPI_STATUS(status);
424 : : }
425 : :
426 : : /* Initialize areas of the object that are specific to the field type */
427 : :
428 [ + - - - ]: 231 : switch (info->field_type) {
429 : 231 : case ACPI_TYPE_LOCAL_REGION_FIELD:
430 : :
431 : 462 : obj_desc->field.region_obj =
432 : 231 : acpi_ns_get_attached_object(info->region_node);
433 : :
434 : : /* Fields specific to generic_serial_bus fields */
435 : :
436 : 231 : obj_desc->field.access_length = info->access_length;
437 : :
438 [ - + ]: 231 : if (info->connection_node) {
439 : 0 : second_desc = info->connection_node->object;
440 [ # # ]: 0 : if (!(second_desc->common.flags & AOPOBJ_DATA_VALID)) {
441 : 0 : status =
442 : 0 : acpi_ds_get_buffer_arguments(second_desc);
443 [ # # ]: 0 : if (ACPI_FAILURE(status)) {
444 : 0 : acpi_ut_delete_object_desc(obj_desc);
445 : 0 : return_ACPI_STATUS(status);
446 : : }
447 : : }
448 : :
449 : 0 : obj_desc->field.resource_buffer =
450 : 0 : second_desc->buffer.pointer;
451 : 0 : obj_desc->field.resource_length =
452 : 0 : (u16)second_desc->buffer.length;
453 [ - + ]: 231 : } else if (info->resource_buffer) {
454 : 0 : obj_desc->field.resource_buffer = info->resource_buffer;
455 : 0 : obj_desc->field.resource_length = info->resource_length;
456 : : }
457 : :
458 : 231 : obj_desc->field.pin_number_index = info->pin_number_index;
459 : :
460 : : /* Allow full data read from EC address space */
461 : :
462 [ - + ]: 231 : if ((obj_desc->field.region_obj->region.space_id ==
463 : : ACPI_ADR_SPACE_EC)
464 [ # # ]: 0 : && (obj_desc->common_field.bit_length > 8)) {
465 : 0 : access_byte_width =
466 : 0 : ACPI_ROUND_BITS_UP_TO_BYTES(obj_desc->common_field.
467 : : bit_length);
468 : :
469 : : /* Maximum byte width supported is 255 */
470 : :
471 [ # # ]: 0 : if (access_byte_width < 256) {
472 : 0 : obj_desc->common_field.access_byte_width =
473 : 0 : (u8)access_byte_width;
474 : : }
475 : : }
476 : : /* An additional reference for the container */
477 : :
478 : 231 : acpi_ut_add_reference(obj_desc->field.region_obj);
479 : :
480 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
481 : : "RegionField: BitOff %X, Off %X, Gran %X, Region %p\n",
482 : : obj_desc->field.start_field_bit_offset,
483 : : obj_desc->field.base_byte_offset,
484 : : obj_desc->field.access_byte_width,
485 : 231 : obj_desc->field.region_obj));
486 : 231 : break;
487 : :
488 : 0 : case ACPI_TYPE_LOCAL_BANK_FIELD:
489 : :
490 : 0 : obj_desc->bank_field.value = info->bank_value;
491 : 0 : obj_desc->bank_field.region_obj =
492 : 0 : acpi_ns_get_attached_object(info->region_node);
493 : 0 : obj_desc->bank_field.bank_obj =
494 : 0 : acpi_ns_get_attached_object(info->register_node);
495 : :
496 : : /* An additional reference for the attached objects */
497 : :
498 : 0 : acpi_ut_add_reference(obj_desc->bank_field.region_obj);
499 : 0 : acpi_ut_add_reference(obj_desc->bank_field.bank_obj);
500 : :
501 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
502 : : "Bank Field: BitOff %X, Off %X, Gran %X, Region %p, BankReg %p\n",
503 : : obj_desc->bank_field.start_field_bit_offset,
504 : : obj_desc->bank_field.base_byte_offset,
505 : : obj_desc->field.access_byte_width,
506 : : obj_desc->bank_field.region_obj,
507 : 0 : obj_desc->bank_field.bank_obj));
508 : :
509 : : /*
510 : : * Remember location in AML stream of the field unit
511 : : * opcode and operands -- since the bank_value
512 : : * operands must be evaluated.
513 : : */
514 : 0 : second_desc = obj_desc->common.next_object;
515 : 0 : second_desc->extra.aml_start =
516 : 0 : ACPI_CAST_PTR(union acpi_parse_object,
517 : 0 : info->data_register_node)->named.data;
518 : 0 : second_desc->extra.aml_length =
519 : 0 : ACPI_CAST_PTR(union acpi_parse_object,
520 : 0 : info->data_register_node)->named.length;
521 : :
522 : 0 : break;
523 : :
524 : 0 : case ACPI_TYPE_LOCAL_INDEX_FIELD:
525 : :
526 : : /* Get the Index and Data registers */
527 : :
528 : 0 : obj_desc->index_field.index_obj =
529 : 0 : acpi_ns_get_attached_object(info->register_node);
530 : 0 : obj_desc->index_field.data_obj =
531 : 0 : acpi_ns_get_attached_object(info->data_register_node);
532 : :
533 [ # # ]: 0 : if (!obj_desc->index_field.data_obj
534 [ # # ]: 0 : || !obj_desc->index_field.index_obj) {
535 : 0 : ACPI_ERROR((AE_INFO,
536 : : "Null Index Object during field prep"));
537 : 0 : acpi_ut_delete_object_desc(obj_desc);
538 : 0 : return_ACPI_STATUS(AE_AML_INTERNAL);
539 : : }
540 : :
541 : : /* An additional reference for the attached objects */
542 : :
543 : 0 : acpi_ut_add_reference(obj_desc->index_field.data_obj);
544 : 0 : acpi_ut_add_reference(obj_desc->index_field.index_obj);
545 : :
546 : : /*
547 : : * April 2006: Changed to match MS behavior
548 : : *
549 : : * The value written to the Index register is the byte offset of the
550 : : * target field in units of the granularity of the index_field
551 : : *
552 : : * Previously, the value was calculated as an index in terms of the
553 : : * width of the Data register, as below:
554 : : *
555 : : * obj_desc->index_field.Value = (u32)
556 : : * (Info->field_bit_position / ACPI_MUL_8 (
557 : : * obj_desc->Field.access_byte_width));
558 : : *
559 : : * February 2006: Tried value as a byte offset:
560 : : * obj_desc->index_field.Value = (u32)
561 : : * ACPI_DIV_8 (Info->field_bit_position);
562 : : */
563 : 0 : obj_desc->index_field.value =
564 : 0 : (u32) ACPI_ROUND_DOWN(ACPI_DIV_8(info->field_bit_position),
565 : : obj_desc->index_field.
566 : : access_byte_width);
567 : :
568 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
569 : : "IndexField: BitOff %X, Off %X, Value %X, "
570 : : "Gran %X, Index %p, Data %p\n",
571 : : obj_desc->index_field.start_field_bit_offset,
572 : : obj_desc->index_field.base_byte_offset,
573 : : obj_desc->index_field.value,
574 : : obj_desc->field.access_byte_width,
575 : : obj_desc->index_field.index_obj,
576 : 0 : obj_desc->index_field.data_obj));
577 : 0 : break;
578 : :
579 : : default:
580 : :
581 : : /* No other types should get here */
582 : :
583 : : break;
584 : : }
585 : :
586 : : /*
587 : : * Store the constructed descriptor (obj_desc) into the parent Node,
588 : : * preserving the current type of that named_obj.
589 : : */
590 : 231 : status =
591 : 231 : acpi_ns_attach_object(info->field_node, obj_desc,
592 : : acpi_ns_get_type(info->field_node));
593 : :
594 : : ACPI_DEBUG_PRINT((ACPI_DB_BFIELD,
595 : : "Set NamedObj %p [%4.4s], ObjDesc %p\n",
596 : : info->field_node,
597 : 231 : acpi_ut_get_node_name(info->field_node), obj_desc));
598 : :
599 : : /* Remove local reference to the object */
600 : :
601 : 231 : acpi_ut_remove_reference(obj_desc);
602 : 231 : return_ACPI_STATUS(status);
603 : : }
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