1 /******************************************************************************
3 * Module Name: dsopcode - Dispatcher Op Region support and handling of
6 *****************************************************************************/
9 * Copyright (C) 2000 - 2008, Intel Corp.
10 * All rights reserved.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
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.
45 #include <acpi/acpi.h>
55 #define _COMPONENT ACPI_DISPATCHER
56 ACPI_MODULE_NAME("dsopcode")
58 /* Local prototypes */
60 acpi_ds_execute_arguments(struct acpi_namespace_node
*node
,
61 struct acpi_namespace_node
*scope_node
,
62 u32 aml_length
, u8
* aml_start
);
65 acpi_ds_init_buffer_field(u16 aml_opcode
,
66 union acpi_operand_object
*obj_desc
,
67 union acpi_operand_object
*buffer_desc
,
68 union acpi_operand_object
*offset_desc
,
69 union acpi_operand_object
*length_desc
,
70 union acpi_operand_object
*result_desc
);
72 /*******************************************************************************
74 * FUNCTION: acpi_ds_execute_arguments
76 * PARAMETERS: Node - Object NS node
77 * scope_node - Parent NS node
78 * aml_length - Length of executable AML
79 * aml_start - Pointer to the AML
83 * DESCRIPTION: Late (deferred) execution of region or field arguments
85 ******************************************************************************/
88 acpi_ds_execute_arguments(struct acpi_namespace_node
*node
,
89 struct acpi_namespace_node
*scope_node
,
90 u32 aml_length
, u8
* aml_start
)
93 union acpi_parse_object
*op
;
94 struct acpi_walk_state
*walk_state
;
96 ACPI_FUNCTION_TRACE(ds_execute_arguments
);
99 * Allocate a new parser op to be the root of the parsed tree
101 op
= acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP
);
103 return_ACPI_STATUS(AE_NO_MEMORY
);
106 /* Save the Node for use in acpi_ps_parse_aml */
108 op
->common
.node
= scope_node
;
110 /* Create and initialize a new parser state */
112 walk_state
= acpi_ds_create_walk_state(0, NULL
, NULL
, NULL
);
114 status
= AE_NO_MEMORY
;
118 status
= acpi_ds_init_aml_walk(walk_state
, op
, NULL
, aml_start
,
119 aml_length
, NULL
, ACPI_IMODE_LOAD_PASS1
);
120 if (ACPI_FAILURE(status
)) {
121 acpi_ds_delete_walk_state(walk_state
);
125 /* Mark this parse as a deferred opcode */
127 walk_state
->parse_flags
= ACPI_PARSE_DEFERRED_OP
;
128 walk_state
->deferred_node
= node
;
130 /* Pass1: Parse the entire declaration */
132 status
= acpi_ps_parse_aml(walk_state
);
133 if (ACPI_FAILURE(status
)) {
137 /* Get and init the Op created above */
139 op
->common
.node
= node
;
140 acpi_ps_delete_parse_tree(op
);
142 /* Evaluate the deferred arguments */
144 op
= acpi_ps_alloc_op(AML_INT_EVAL_SUBTREE_OP
);
146 return_ACPI_STATUS(AE_NO_MEMORY
);
149 op
->common
.node
= scope_node
;
151 /* Create and initialize a new parser state */
153 walk_state
= acpi_ds_create_walk_state(0, NULL
, NULL
, NULL
);
155 status
= AE_NO_MEMORY
;
159 /* Execute the opcode and arguments */
161 status
= acpi_ds_init_aml_walk(walk_state
, op
, NULL
, aml_start
,
162 aml_length
, NULL
, ACPI_IMODE_EXECUTE
);
163 if (ACPI_FAILURE(status
)) {
164 acpi_ds_delete_walk_state(walk_state
);
168 /* Mark this execution as a deferred opcode */
170 walk_state
->deferred_node
= node
;
171 status
= acpi_ps_parse_aml(walk_state
);
174 acpi_ps_delete_parse_tree(op
);
175 return_ACPI_STATUS(status
);
178 /*******************************************************************************
180 * FUNCTION: acpi_ds_get_buffer_field_arguments
182 * PARAMETERS: obj_desc - A valid buffer_field object
186 * DESCRIPTION: Get buffer_field Buffer and Index. This implements the late
187 * evaluation of these field attributes.
189 ******************************************************************************/
192 acpi_ds_get_buffer_field_arguments(union acpi_operand_object
*obj_desc
)
194 union acpi_operand_object
*extra_desc
;
195 struct acpi_namespace_node
*node
;
198 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_field_arguments
, obj_desc
);
200 if (obj_desc
->common
.flags
& AOPOBJ_DATA_VALID
) {
201 return_ACPI_STATUS(AE_OK
);
204 /* Get the AML pointer (method object) and buffer_field node */
206 extra_desc
= acpi_ns_get_secondary_object(obj_desc
);
207 node
= obj_desc
->buffer_field
.node
;
209 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
210 (ACPI_TYPE_BUFFER_FIELD
, node
, NULL
));
211 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "[%4.4s] BufferField Arg Init\n",
212 acpi_ut_get_node_name(node
)));
214 /* Execute the AML code for the term_arg arguments */
216 status
= acpi_ds_execute_arguments(node
, acpi_ns_get_parent_node(node
),
217 extra_desc
->extra
.aml_length
,
218 extra_desc
->extra
.aml_start
);
219 return_ACPI_STATUS(status
);
222 /*******************************************************************************
224 * FUNCTION: acpi_ds_get_bank_field_arguments
226 * PARAMETERS: obj_desc - A valid bank_field object
230 * DESCRIPTION: Get bank_field bank_value. This implements the late
231 * evaluation of these field attributes.
233 ******************************************************************************/
236 acpi_ds_get_bank_field_arguments(union acpi_operand_object
*obj_desc
)
238 union acpi_operand_object
*extra_desc
;
239 struct acpi_namespace_node
*node
;
242 ACPI_FUNCTION_TRACE_PTR(ds_get_bank_field_arguments
, obj_desc
);
244 if (obj_desc
->common
.flags
& AOPOBJ_DATA_VALID
) {
245 return_ACPI_STATUS(AE_OK
);
248 /* Get the AML pointer (method object) and bank_field node */
250 extra_desc
= acpi_ns_get_secondary_object(obj_desc
);
251 node
= obj_desc
->bank_field
.node
;
253 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
254 (ACPI_TYPE_LOCAL_BANK_FIELD
, node
, NULL
));
255 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "[%4.4s] BankField Arg Init\n",
256 acpi_ut_get_node_name(node
)));
258 /* Execute the AML code for the term_arg arguments */
260 status
= acpi_ds_execute_arguments(node
, acpi_ns_get_parent_node(node
),
261 extra_desc
->extra
.aml_length
,
262 extra_desc
->extra
.aml_start
);
263 return_ACPI_STATUS(status
);
266 /*******************************************************************************
268 * FUNCTION: acpi_ds_get_buffer_arguments
270 * PARAMETERS: obj_desc - A valid Buffer object
274 * DESCRIPTION: Get Buffer length and initializer byte list. This implements
275 * the late evaluation of these attributes.
277 ******************************************************************************/
279 acpi_status
acpi_ds_get_buffer_arguments(union acpi_operand_object
*obj_desc
)
281 struct acpi_namespace_node
*node
;
284 ACPI_FUNCTION_TRACE_PTR(ds_get_buffer_arguments
, obj_desc
);
286 if (obj_desc
->common
.flags
& AOPOBJ_DATA_VALID
) {
287 return_ACPI_STATUS(AE_OK
);
290 /* Get the Buffer node */
292 node
= obj_desc
->buffer
.node
;
295 "No pointer back to NS node in buffer obj %p",
297 return_ACPI_STATUS(AE_AML_INTERNAL
);
300 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "Buffer Arg Init\n"));
302 /* Execute the AML code for the term_arg arguments */
304 status
= acpi_ds_execute_arguments(node
, node
,
305 obj_desc
->buffer
.aml_length
,
306 obj_desc
->buffer
.aml_start
);
307 return_ACPI_STATUS(status
);
310 /*******************************************************************************
312 * FUNCTION: acpi_ds_get_package_arguments
314 * PARAMETERS: obj_desc - A valid Package object
318 * DESCRIPTION: Get Package length and initializer byte list. This implements
319 * the late evaluation of these attributes.
321 ******************************************************************************/
323 acpi_status
acpi_ds_get_package_arguments(union acpi_operand_object
*obj_desc
)
325 struct acpi_namespace_node
*node
;
328 ACPI_FUNCTION_TRACE_PTR(ds_get_package_arguments
, obj_desc
);
330 if (obj_desc
->common
.flags
& AOPOBJ_DATA_VALID
) {
331 return_ACPI_STATUS(AE_OK
);
334 /* Get the Package node */
336 node
= obj_desc
->package
.node
;
339 "No pointer back to NS node in package %p",
341 return_ACPI_STATUS(AE_AML_INTERNAL
);
344 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "Package Arg Init\n"));
346 /* Execute the AML code for the term_arg arguments */
348 status
= acpi_ds_execute_arguments(node
, node
,
349 obj_desc
->package
.aml_length
,
350 obj_desc
->package
.aml_start
);
351 return_ACPI_STATUS(status
);
354 /*****************************************************************************
356 * FUNCTION: acpi_ds_get_region_arguments
358 * PARAMETERS: obj_desc - A valid region object
362 * DESCRIPTION: Get region address and length. This implements the late
363 * evaluation of these region attributes.
365 ****************************************************************************/
367 acpi_status
acpi_ds_get_region_arguments(union acpi_operand_object
*obj_desc
)
369 struct acpi_namespace_node
*node
;
371 union acpi_operand_object
*extra_desc
;
373 ACPI_FUNCTION_TRACE_PTR(ds_get_region_arguments
, obj_desc
);
375 if (obj_desc
->region
.flags
& AOPOBJ_DATA_VALID
) {
376 return_ACPI_STATUS(AE_OK
);
379 extra_desc
= acpi_ns_get_secondary_object(obj_desc
);
381 return_ACPI_STATUS(AE_NOT_EXIST
);
384 /* Get the Region node */
386 node
= obj_desc
->region
.node
;
388 ACPI_DEBUG_EXEC(acpi_ut_display_init_pathname
389 (ACPI_TYPE_REGION
, node
, NULL
));
391 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "[%4.4s] OpRegion Arg Init at AML %p\n",
392 acpi_ut_get_node_name(node
),
393 extra_desc
->extra
.aml_start
));
395 /* Execute the argument AML */
397 status
= acpi_ds_execute_arguments(node
, acpi_ns_get_parent_node(node
),
398 extra_desc
->extra
.aml_length
,
399 extra_desc
->extra
.aml_start
);
400 if (ACPI_FAILURE(status
)) {
401 return_ACPI_STATUS(status
);
404 /* Validate the region address/length via the host OS */
406 status
= acpi_os_validate_address(obj_desc
->region
.space_id
,
407 obj_desc
->region
.address
,
408 (acpi_size
) obj_desc
->region
.length
,
409 acpi_ut_get_node_name(node
));
411 if (ACPI_FAILURE(status
)) {
413 * Invalid address/length. We will emit an error message and mark
414 * the region as invalid, so that it will cause an additional error if
415 * it is ever used. Then return AE_OK.
417 ACPI_EXCEPTION((AE_INFO
, status
,
418 "During address validation of OpRegion [%4.4s]",
420 obj_desc
->common
.flags
|= AOPOBJ_INVALID
;
424 return_ACPI_STATUS(status
);
427 /*******************************************************************************
429 * FUNCTION: acpi_ds_initialize_region
431 * PARAMETERS: obj_handle - Region namespace node
435 * DESCRIPTION: Front end to ev_initialize_region
437 ******************************************************************************/
439 acpi_status
acpi_ds_initialize_region(acpi_handle obj_handle
)
441 union acpi_operand_object
*obj_desc
;
444 obj_desc
= acpi_ns_get_attached_object(obj_handle
);
446 /* Namespace is NOT locked */
448 status
= acpi_ev_initialize_region(obj_desc
, FALSE
);
452 /*******************************************************************************
454 * FUNCTION: acpi_ds_init_buffer_field
456 * PARAMETERS: aml_opcode - create_xxx_field
457 * obj_desc - buffer_field object
458 * buffer_desc - Host Buffer
459 * offset_desc - Offset into buffer
460 * length_desc - Length of field (CREATE_FIELD_OP only)
461 * result_desc - Where to store the result
465 * DESCRIPTION: Perform actual initialization of a buffer field
467 ******************************************************************************/
470 acpi_ds_init_buffer_field(u16 aml_opcode
,
471 union acpi_operand_object
*obj_desc
,
472 union acpi_operand_object
*buffer_desc
,
473 union acpi_operand_object
*offset_desc
,
474 union acpi_operand_object
*length_desc
,
475 union acpi_operand_object
*result_desc
)
483 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field
, obj_desc
);
485 /* Host object must be a Buffer */
487 if (buffer_desc
->common
.type
!= ACPI_TYPE_BUFFER
) {
489 "Target of Create Field is not a Buffer object - %s",
490 acpi_ut_get_object_type_name(buffer_desc
)));
492 status
= AE_AML_OPERAND_TYPE
;
497 * The last parameter to all of these opcodes (result_desc) started
498 * out as a name_string, and should therefore now be a NS node
499 * after resolution in acpi_ex_resolve_operands().
501 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc
) != ACPI_DESC_TYPE_NAMED
) {
503 "(%s) destination not a NS Node [%s]",
504 acpi_ps_get_opcode_name(aml_opcode
),
505 acpi_ut_get_descriptor_name(result_desc
)));
507 status
= AE_AML_OPERAND_TYPE
;
511 offset
= (u32
) offset_desc
->integer
.value
;
514 * Setup the Bit offsets and counts, according to the opcode
516 switch (aml_opcode
) {
517 case AML_CREATE_FIELD_OP
:
519 /* Offset is in bits, count is in bits */
521 field_flags
= AML_FIELD_ACCESS_BYTE
;
523 bit_count
= (u32
) length_desc
->integer
.value
;
525 /* Must have a valid (>0) bit count */
527 if (bit_count
== 0) {
529 "Attempt to CreateField of length zero"));
530 status
= AE_AML_OPERAND_VALUE
;
535 case AML_CREATE_BIT_FIELD_OP
:
537 /* Offset is in bits, Field is one bit */
541 field_flags
= AML_FIELD_ACCESS_BYTE
;
544 case AML_CREATE_BYTE_FIELD_OP
:
546 /* Offset is in bytes, field is one byte */
548 bit_offset
= 8 * offset
;
550 field_flags
= AML_FIELD_ACCESS_BYTE
;
553 case AML_CREATE_WORD_FIELD_OP
:
555 /* Offset is in bytes, field is one word */
557 bit_offset
= 8 * offset
;
559 field_flags
= AML_FIELD_ACCESS_WORD
;
562 case AML_CREATE_DWORD_FIELD_OP
:
564 /* Offset is in bytes, field is one dword */
566 bit_offset
= 8 * offset
;
568 field_flags
= AML_FIELD_ACCESS_DWORD
;
571 case AML_CREATE_QWORD_FIELD_OP
:
573 /* Offset is in bytes, field is one qword */
575 bit_offset
= 8 * offset
;
577 field_flags
= AML_FIELD_ACCESS_QWORD
;
583 "Unknown field creation opcode %02x", aml_opcode
));
584 status
= AE_AML_BAD_OPCODE
;
588 /* Entire field must fit within the current length of the buffer */
590 if ((bit_offset
+ bit_count
) > (8 * (u32
) buffer_desc
->buffer
.length
)) {
592 "Field [%4.4s] at %d exceeds Buffer [%4.4s] size %d (bits)",
593 acpi_ut_get_node_name(result_desc
),
594 bit_offset
+ bit_count
,
595 acpi_ut_get_node_name(buffer_desc
->buffer
.node
),
596 8 * (u32
) buffer_desc
->buffer
.length
));
597 status
= AE_AML_BUFFER_LIMIT
;
602 * Initialize areas of the field object that are common to all fields
603 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
604 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
606 status
= acpi_ex_prep_common_field_object(obj_desc
, field_flags
, 0,
607 bit_offset
, bit_count
);
608 if (ACPI_FAILURE(status
)) {
612 obj_desc
->buffer_field
.buffer_obj
= buffer_desc
;
614 /* Reference count for buffer_desc inherits obj_desc count */
616 buffer_desc
->common
.reference_count
= (u16
)
617 (buffer_desc
->common
.reference_count
+
618 obj_desc
->common
.reference_count
);
622 /* Always delete the operands */
624 acpi_ut_remove_reference(offset_desc
);
625 acpi_ut_remove_reference(buffer_desc
);
627 if (aml_opcode
== AML_CREATE_FIELD_OP
) {
628 acpi_ut_remove_reference(length_desc
);
631 /* On failure, delete the result descriptor */
633 if (ACPI_FAILURE(status
)) {
634 acpi_ut_remove_reference(result_desc
); /* Result descriptor */
636 /* Now the address and length are valid for this buffer_field */
638 obj_desc
->buffer_field
.flags
|= AOPOBJ_DATA_VALID
;
641 return_ACPI_STATUS(status
);
644 /*******************************************************************************
646 * FUNCTION: acpi_ds_eval_buffer_field_operands
648 * PARAMETERS: walk_state - Current walk
649 * Op - A valid buffer_field Op object
653 * DESCRIPTION: Get buffer_field Buffer and Index
654 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
656 ******************************************************************************/
659 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state
*walk_state
,
660 union acpi_parse_object
*op
)
663 union acpi_operand_object
*obj_desc
;
664 struct acpi_namespace_node
*node
;
665 union acpi_parse_object
*next_op
;
667 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands
, op
);
670 * This is where we evaluate the address and length fields of the
671 * create_xxx_field declaration
673 node
= op
->common
.node
;
675 /* next_op points to the op that holds the Buffer */
677 next_op
= op
->common
.value
.arg
;
679 /* Evaluate/create the address and length operands */
681 status
= acpi_ds_create_operands(walk_state
, next_op
);
682 if (ACPI_FAILURE(status
)) {
683 return_ACPI_STATUS(status
);
686 obj_desc
= acpi_ns_get_attached_object(node
);
688 return_ACPI_STATUS(AE_NOT_EXIST
);
691 /* Resolve the operands */
693 status
= acpi_ex_resolve_operands(op
->common
.aml_opcode
,
694 ACPI_WALK_OPERANDS
, walk_state
);
695 if (ACPI_FAILURE(status
)) {
696 ACPI_ERROR((AE_INFO
, "(%s) bad operand(s) (%X)",
697 acpi_ps_get_opcode_name(op
->common
.aml_opcode
),
700 return_ACPI_STATUS(status
);
703 /* Initialize the Buffer Field */
705 if (op
->common
.aml_opcode
== AML_CREATE_FIELD_OP
) {
707 /* NOTE: Slightly different operands for this opcode */
710 acpi_ds_init_buffer_field(op
->common
.aml_opcode
, obj_desc
,
711 walk_state
->operands
[0],
712 walk_state
->operands
[1],
713 walk_state
->operands
[2],
714 walk_state
->operands
[3]);
716 /* All other, create_xxx_field opcodes */
719 acpi_ds_init_buffer_field(op
->common
.aml_opcode
, obj_desc
,
720 walk_state
->operands
[0],
721 walk_state
->operands
[1], NULL
,
722 walk_state
->operands
[2]);
725 return_ACPI_STATUS(status
);
728 /*******************************************************************************
730 * FUNCTION: acpi_ds_eval_region_operands
732 * PARAMETERS: walk_state - Current walk
733 * Op - A valid region Op object
737 * DESCRIPTION: Get region address and length
738 * Called from acpi_ds_exec_end_op during op_region parse tree walk
740 ******************************************************************************/
743 acpi_ds_eval_region_operands(struct acpi_walk_state
*walk_state
,
744 union acpi_parse_object
*op
)
747 union acpi_operand_object
*obj_desc
;
748 union acpi_operand_object
*operand_desc
;
749 struct acpi_namespace_node
*node
;
750 union acpi_parse_object
*next_op
;
752 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands
, op
);
755 * This is where we evaluate the address and length fields of the
756 * op_region declaration
758 node
= op
->common
.node
;
760 /* next_op points to the op that holds the space_iD */
762 next_op
= op
->common
.value
.arg
;
764 /* next_op points to address op */
766 next_op
= next_op
->common
.next
;
768 /* Evaluate/create the address and length operands */
770 status
= acpi_ds_create_operands(walk_state
, next_op
);
771 if (ACPI_FAILURE(status
)) {
772 return_ACPI_STATUS(status
);
775 /* Resolve the length and address operands to numbers */
777 status
= acpi_ex_resolve_operands(op
->common
.aml_opcode
,
778 ACPI_WALK_OPERANDS
, walk_state
);
779 if (ACPI_FAILURE(status
)) {
780 return_ACPI_STATUS(status
);
783 obj_desc
= acpi_ns_get_attached_object(node
);
785 return_ACPI_STATUS(AE_NOT_EXIST
);
789 * Get the length operand and save it
792 operand_desc
= walk_state
->operands
[walk_state
->num_operands
- 1];
794 obj_desc
->region
.length
= (u32
) operand_desc
->integer
.value
;
795 acpi_ut_remove_reference(operand_desc
);
798 * Get the address and save it
799 * (at top of stack - 1)
801 operand_desc
= walk_state
->operands
[walk_state
->num_operands
- 2];
803 obj_desc
->region
.address
= (acpi_physical_address
)
804 operand_desc
->integer
.value
;
805 acpi_ut_remove_reference(operand_desc
);
807 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
809 ACPI_FORMAT_NATIVE_UINT(obj_desc
->region
.address
),
810 obj_desc
->region
.length
));
812 /* Now the address and length are valid for this opregion */
814 obj_desc
->region
.flags
|= AOPOBJ_DATA_VALID
;
816 return_ACPI_STATUS(status
);
819 /*******************************************************************************
821 * FUNCTION: acpi_ds_eval_table_region_operands
823 * PARAMETERS: walk_state - Current walk
824 * Op - A valid region Op object
828 * DESCRIPTION: Get region address and length
829 * Called from acpi_ds_exec_end_op during data_table_region parse tree walk
831 ******************************************************************************/
834 acpi_ds_eval_table_region_operands(struct acpi_walk_state
*walk_state
,
835 union acpi_parse_object
*op
)
838 union acpi_operand_object
*obj_desc
;
839 union acpi_operand_object
**operand
;
840 struct acpi_namespace_node
*node
;
841 union acpi_parse_object
*next_op
;
843 struct acpi_table_header
*table
;
845 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands
, op
);
848 * This is where we evaluate the signature_string and oem_iDString
849 * and oem_table_iDString of the data_table_region declaration
851 node
= op
->common
.node
;
853 /* next_op points to signature_string op */
855 next_op
= op
->common
.value
.arg
;
858 * Evaluate/create the signature_string and oem_iDString
859 * and oem_table_iDString operands
861 status
= acpi_ds_create_operands(walk_state
, next_op
);
862 if (ACPI_FAILURE(status
)) {
863 return_ACPI_STATUS(status
);
867 * Resolve the signature_string and oem_iDString
868 * and oem_table_iDString operands
870 status
= acpi_ex_resolve_operands(op
->common
.aml_opcode
,
871 ACPI_WALK_OPERANDS
, walk_state
);
872 if (ACPI_FAILURE(status
)) {
873 return_ACPI_STATUS(status
);
876 operand
= &walk_state
->operands
[0];
878 /* Find the ACPI table */
880 status
= acpi_tb_find_table(operand
[0]->string
.pointer
,
881 operand
[1]->string
.pointer
,
882 operand
[2]->string
.pointer
, &table_index
);
883 if (ACPI_FAILURE(status
)) {
884 return_ACPI_STATUS(status
);
887 acpi_ut_remove_reference(operand
[0]);
888 acpi_ut_remove_reference(operand
[1]);
889 acpi_ut_remove_reference(operand
[2]);
891 status
= acpi_get_table_by_index(table_index
, &table
);
892 if (ACPI_FAILURE(status
)) {
893 return_ACPI_STATUS(status
);
896 obj_desc
= acpi_ns_get_attached_object(node
);
898 return_ACPI_STATUS(AE_NOT_EXIST
);
901 obj_desc
->region
.address
=
902 (acpi_physical_address
) ACPI_TO_INTEGER(table
);
903 obj_desc
->region
.length
= table
->length
;
905 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
907 ACPI_FORMAT_NATIVE_UINT(obj_desc
->region
.address
),
908 obj_desc
->region
.length
));
910 /* Now the address and length are valid for this opregion */
912 obj_desc
->region
.flags
|= AOPOBJ_DATA_VALID
;
914 return_ACPI_STATUS(status
);
917 /*******************************************************************************
919 * FUNCTION: acpi_ds_eval_data_object_operands
921 * PARAMETERS: walk_state - Current walk
922 * Op - A valid data_object Op object
923 * obj_desc - data_object
927 * DESCRIPTION: Get the operands and complete the following data object types:
930 ******************************************************************************/
933 acpi_ds_eval_data_object_operands(struct acpi_walk_state
*walk_state
,
934 union acpi_parse_object
*op
,
935 union acpi_operand_object
*obj_desc
)
938 union acpi_operand_object
*arg_desc
;
941 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands
);
943 /* The first operand (for all of these data objects) is the length */
946 * Set proper index into operand stack for acpi_ds_obj_stack_push
947 * invoked inside acpi_ds_create_operand.
949 walk_state
->operand_index
= walk_state
->num_operands
;
951 status
= acpi_ds_create_operand(walk_state
, op
->common
.value
.arg
, 1);
952 if (ACPI_FAILURE(status
)) {
953 return_ACPI_STATUS(status
);
956 status
= acpi_ex_resolve_operands(walk_state
->opcode
,
958 operands
[walk_state
->num_operands
-
960 if (ACPI_FAILURE(status
)) {
961 return_ACPI_STATUS(status
);
964 /* Extract length operand */
966 arg_desc
= walk_state
->operands
[walk_state
->num_operands
- 1];
967 length
= (u32
) arg_desc
->integer
.value
;
969 /* Cleanup for length operand */
971 status
= acpi_ds_obj_stack_pop(1, walk_state
);
972 if (ACPI_FAILURE(status
)) {
973 return_ACPI_STATUS(status
);
976 acpi_ut_remove_reference(arg_desc
);
979 * Create the actual data object
981 switch (op
->common
.aml_opcode
) {
985 acpi_ds_build_internal_buffer_obj(walk_state
, op
, length
,
990 case AML_VAR_PACKAGE_OP
:
993 acpi_ds_build_internal_package_obj(walk_state
, op
, length
,
998 return_ACPI_STATUS(AE_AML_BAD_OPCODE
);
1001 if (ACPI_SUCCESS(status
)) {
1003 * Return the object in the walk_state, unless the parent is a package -
1004 * in this case, the return object will be stored in the parse tree
1007 if ((!op
->common
.parent
) ||
1008 ((op
->common
.parent
->common
.aml_opcode
!= AML_PACKAGE_OP
) &&
1009 (op
->common
.parent
->common
.aml_opcode
!=
1011 && (op
->common
.parent
->common
.aml_opcode
!= AML_NAME_OP
))) {
1012 walk_state
->result_obj
= obj_desc
;
1016 return_ACPI_STATUS(status
);
1019 /*******************************************************************************
1021 * FUNCTION: acpi_ds_eval_bank_field_operands
1023 * PARAMETERS: walk_state - Current walk
1024 * Op - A valid bank_field Op object
1028 * DESCRIPTION: Get bank_field bank_value
1029 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
1031 ******************************************************************************/
1034 acpi_ds_eval_bank_field_operands(struct acpi_walk_state
*walk_state
,
1035 union acpi_parse_object
*op
)
1038 union acpi_operand_object
*obj_desc
;
1039 union acpi_operand_object
*operand_desc
;
1040 struct acpi_namespace_node
*node
;
1041 union acpi_parse_object
*next_op
;
1042 union acpi_parse_object
*arg
;
1044 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands
, op
);
1047 * This is where we evaluate the bank_value field of the
1048 * bank_field declaration
1051 /* next_op points to the op that holds the Region */
1053 next_op
= op
->common
.value
.arg
;
1055 /* next_op points to the op that holds the Bank Register */
1057 next_op
= next_op
->common
.next
;
1059 /* next_op points to the op that holds the Bank Value */
1061 next_op
= next_op
->common
.next
;
1064 * Set proper index into operand stack for acpi_ds_obj_stack_push
1065 * invoked inside acpi_ds_create_operand.
1067 * We use walk_state->Operands[0] to store the evaluated bank_value
1069 walk_state
->operand_index
= 0;
1071 status
= acpi_ds_create_operand(walk_state
, next_op
, 0);
1072 if (ACPI_FAILURE(status
)) {
1073 return_ACPI_STATUS(status
);
1076 status
= acpi_ex_resolve_to_value(&walk_state
->operands
[0], walk_state
);
1077 if (ACPI_FAILURE(status
)) {
1078 return_ACPI_STATUS(status
);
1081 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS
,
1082 acpi_ps_get_opcode_name(op
->common
.aml_opcode
), 1);
1084 * Get the bank_value operand and save it
1087 operand_desc
= walk_state
->operands
[0];
1089 /* Arg points to the start Bank Field */
1091 arg
= acpi_ps_get_arg(op
, 4);
1094 /* Ignore OFFSET and ACCESSAS terms here */
1096 if (arg
->common
.aml_opcode
== AML_INT_NAMEDFIELD_OP
) {
1097 node
= arg
->common
.node
;
1099 obj_desc
= acpi_ns_get_attached_object(node
);
1101 return_ACPI_STATUS(AE_NOT_EXIST
);
1104 obj_desc
->bank_field
.value
=
1105 (u32
) operand_desc
->integer
.value
;
1108 /* Move to next field in the list */
1110 arg
= arg
->common
.next
;
1113 acpi_ut_remove_reference(operand_desc
);
1114 return_ACPI_STATUS(status
);
1117 /*******************************************************************************
1119 * FUNCTION: acpi_ds_exec_begin_control_op
1121 * PARAMETERS: walk_list - The list that owns the walk stack
1122 * Op - The control Op
1126 * DESCRIPTION: Handles all control ops encountered during control method
1129 ******************************************************************************/
1132 acpi_ds_exec_begin_control_op(struct acpi_walk_state
*walk_state
,
1133 union acpi_parse_object
*op
)
1135 acpi_status status
= AE_OK
;
1136 union acpi_generic_state
*control_state
;
1138 ACPI_FUNCTION_NAME(ds_exec_begin_control_op
);
1140 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
, "Op=%p Opcode=%2.2X State=%p\n", op
,
1141 op
->common
.aml_opcode
, walk_state
));
1143 switch (op
->common
.aml_opcode
) {
1147 * If this is an additional iteration of a while loop, continue.
1148 * There is no need to allocate a new control state.
1150 if (walk_state
->control_state
) {
1151 if (walk_state
->control_state
->control
.aml_predicate_start
1152 == (walk_state
->parser_state
.aml
- 1)) {
1154 /* Reset the state to start-of-loop */
1156 walk_state
->control_state
->common
.state
=
1157 ACPI_CONTROL_CONDITIONAL_EXECUTING
;
1162 /*lint -fallthrough */
1167 * IF/WHILE: Create a new control state to manage these
1168 * constructs. We need to manage these as a stack, in order
1169 * to handle nesting.
1171 control_state
= acpi_ut_create_control_state();
1172 if (!control_state
) {
1173 status
= AE_NO_MEMORY
;
1177 * Save a pointer to the predicate for multiple executions
1180 control_state
->control
.aml_predicate_start
=
1181 walk_state
->parser_state
.aml
- 1;
1182 control_state
->control
.package_end
=
1183 walk_state
->parser_state
.pkg_end
;
1184 control_state
->control
.opcode
= op
->common
.aml_opcode
;
1186 /* Push the control state on this walk's control stack */
1188 acpi_ut_push_generic_state(&walk_state
->control_state
,
1194 /* Predicate is in the state object */
1195 /* If predicate is true, the IF was executed, ignore ELSE part */
1197 if (walk_state
->last_predicate
) {
1198 status
= AE_CTRL_TRUE
;
1214 /*******************************************************************************
1216 * FUNCTION: acpi_ds_exec_end_control_op
1218 * PARAMETERS: walk_list - The list that owns the walk stack
1219 * Op - The control Op
1223 * DESCRIPTION: Handles all control ops encountered during control method
1226 ******************************************************************************/
1229 acpi_ds_exec_end_control_op(struct acpi_walk_state
* walk_state
,
1230 union acpi_parse_object
* op
)
1232 acpi_status status
= AE_OK
;
1233 union acpi_generic_state
*control_state
;
1235 ACPI_FUNCTION_NAME(ds_exec_end_control_op
);
1237 switch (op
->common
.aml_opcode
) {
1240 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
, "[IF_OP] Op=%p\n", op
));
1243 * Save the result of the predicate in case there is an
1246 walk_state
->last_predicate
=
1247 (u8
) walk_state
->control_state
->common
.value
;
1250 * Pop the control state that was created at the start
1251 * of the IF and free it
1254 acpi_ut_pop_generic_state(&walk_state
->control_state
);
1255 acpi_ut_delete_generic_state(control_state
);
1264 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
, "[WHILE_OP] Op=%p\n", op
));
1266 control_state
= walk_state
->control_state
;
1267 if (control_state
->common
.value
) {
1269 /* Predicate was true, the body of the loop was just executed */
1272 * This loop counter mechanism allows the interpreter to escape
1273 * possibly infinite loops. This can occur in poorly written AML
1274 * when the hardware does not respond within a while loop and the
1275 * loop does not implement a timeout.
1277 control_state
->control
.loop_count
++;
1278 if (control_state
->control
.loop_count
>
1279 ACPI_MAX_LOOP_ITERATIONS
) {
1280 status
= AE_AML_INFINITE_LOOP
;
1285 * Go back and evaluate the predicate and maybe execute the loop
1288 status
= AE_CTRL_PENDING
;
1289 walk_state
->aml_last_while
=
1290 control_state
->control
.aml_predicate_start
;
1294 /* Predicate was false, terminate this while loop */
1296 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
,
1297 "[WHILE_OP] termination! Op=%p\n", op
));
1299 /* Pop this control state and free it */
1302 acpi_ut_pop_generic_state(&walk_state
->control_state
);
1303 acpi_ut_delete_generic_state(control_state
);
1308 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
,
1309 "[RETURN_OP] Op=%p Arg=%p\n", op
,
1310 op
->common
.value
.arg
));
1313 * One optional operand -- the return value
1314 * It can be either an immediate operand or a result that
1315 * has been bubbled up the tree
1317 if (op
->common
.value
.arg
) {
1319 /* Since we have a real Return(), delete any implicit return */
1321 acpi_ds_clear_implicit_return(walk_state
);
1323 /* Return statement has an immediate operand */
1326 acpi_ds_create_operands(walk_state
,
1327 op
->common
.value
.arg
);
1328 if (ACPI_FAILURE(status
)) {
1333 * If value being returned is a Reference (such as
1334 * an arg or local), resolve it now because it may
1335 * cease to exist at the end of the method.
1338 acpi_ex_resolve_to_value(&walk_state
->operands
[0],
1340 if (ACPI_FAILURE(status
)) {
1345 * Get the return value and save as the last result
1346 * value. This is the only place where walk_state->return_desc
1347 * is set to anything other than zero!
1349 walk_state
->return_desc
= walk_state
->operands
[0];
1350 } else if (walk_state
->result_count
) {
1352 /* Since we have a real Return(), delete any implicit return */
1354 acpi_ds_clear_implicit_return(walk_state
);
1357 * The return value has come from a previous calculation.
1359 * If value being returned is a Reference (such as
1360 * an arg or local), resolve it now because it may
1361 * cease to exist at the end of the method.
1363 * Allow references created by the Index operator to return unchanged.
1365 if ((ACPI_GET_DESCRIPTOR_TYPE
1366 (walk_state
->results
->results
.obj_desc
[0]) ==
1367 ACPI_DESC_TYPE_OPERAND
)
1368 && ((walk_state
->results
->results
.obj_desc
[0])->
1369 common
.type
== ACPI_TYPE_LOCAL_REFERENCE
)
1370 && ((walk_state
->results
->results
.obj_desc
[0])->
1371 reference
.class != ACPI_REFCLASS_INDEX
)) {
1373 acpi_ex_resolve_to_value(&walk_state
->
1377 if (ACPI_FAILURE(status
)) {
1382 walk_state
->return_desc
=
1383 walk_state
->results
->results
.obj_desc
[0];
1385 /* No return operand */
1387 if (walk_state
->num_operands
) {
1388 acpi_ut_remove_reference(walk_state
->
1392 walk_state
->operands
[0] = NULL
;
1393 walk_state
->num_operands
= 0;
1394 walk_state
->return_desc
= NULL
;
1397 ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH
,
1398 "Completed RETURN_OP State=%p, RetVal=%p\n",
1399 walk_state
, walk_state
->return_desc
));
1401 /* End the control method execution right now */
1403 status
= AE_CTRL_TERMINATE
;
1408 /* Just do nothing! */
1411 case AML_BREAK_POINT_OP
:
1414 * Set the single-step flag. This will cause the debugger (if present)
1415 * to break to the console within the AML debugger at the start of the
1416 * next AML instruction.
1418 ACPI_DEBUGGER_EXEC(acpi_gbl_cm_single_step
= TRUE
);
1419 ACPI_DEBUGGER_EXEC(acpi_os_printf
1420 ("**break** Executed AML BreakPoint opcode\n"));
1422 /* Call to the OSL in case OS wants a piece of the action */
1424 status
= acpi_os_signal(ACPI_SIGNAL_BREAKPOINT
,
1425 "Executed AML Breakpoint opcode");
1429 case AML_CONTINUE_OP
: /* ACPI 2.0 */
1431 /* Pop and delete control states until we find a while */
1433 while (walk_state
->control_state
&&
1434 (walk_state
->control_state
->control
.opcode
!=
1437 acpi_ut_pop_generic_state(&walk_state
->
1439 acpi_ut_delete_generic_state(control_state
);
1442 /* No while found? */
1444 if (!walk_state
->control_state
) {
1445 return (AE_AML_NO_WHILE
);
1448 /* Was: walk_state->aml_last_while = walk_state->control_state->Control.aml_predicate_start; */
1450 walk_state
->aml_last_while
=
1451 walk_state
->control_state
->control
.package_end
;
1453 /* Return status depending on opcode */
1455 if (op
->common
.aml_opcode
== AML_BREAK_OP
) {
1456 status
= AE_CTRL_BREAK
;
1458 status
= AE_CTRL_CONTINUE
;
1464 ACPI_ERROR((AE_INFO
, "Unknown control opcode=%X Op=%p",
1465 op
->common
.aml_opcode
, op
));
1467 status
= AE_AML_BAD_OPCODE
;