1 /******************************************************************************
3 * Module Name: dsopcode - Dispatcher support for regions and fields
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2015, Intel Corp.
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12 * modification, are permitted provided that the following conditions
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20 * including a substantially similar Disclaimer requirement for further
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
26 * Alternatively, this software may be distributed under the terms of the
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44 #include <acpi/acpi.h>
54 #define _COMPONENT ACPI_DISPATCHER
55 ACPI_MODULE_NAME("dsopcode")
57 /* Local prototypes */
59 acpi_ds_init_buffer_field(u16 aml_opcode,
60 union acpi_operand_object *obj_desc,
61 union acpi_operand_object *buffer_desc,
62 union acpi_operand_object *offset_desc,
63 union acpi_operand_object *length_desc,
64 union acpi_operand_object *result_desc);
66 /*******************************************************************************
68 * FUNCTION: acpi_ds_initialize_region
70 * PARAMETERS: obj_handle - Region namespace node
74 * DESCRIPTION: Front end to ev_initialize_region
76 ******************************************************************************/
78 acpi_status acpi_ds_initialize_region(acpi_handle obj_handle)
80 union acpi_operand_object *obj_desc;
83 obj_desc = acpi_ns_get_attached_object(obj_handle);
85 /* Namespace is NOT locked */
87 status = acpi_ev_initialize_region(obj_desc, FALSE);
91 /*******************************************************************************
93 * FUNCTION: acpi_ds_init_buffer_field
95 * PARAMETERS: aml_opcode - create_xxx_field
96 * obj_desc - buffer_field object
97 * buffer_desc - Host Buffer
98 * offset_desc - Offset into buffer
99 * length_desc - Length of field (CREATE_FIELD_OP only)
100 * result_desc - Where to store the result
104 * DESCRIPTION: Perform actual initialization of a buffer field
106 ******************************************************************************/
109 acpi_ds_init_buffer_field(u16 aml_opcode,
110 union acpi_operand_object *obj_desc,
111 union acpi_operand_object *buffer_desc,
112 union acpi_operand_object *offset_desc,
113 union acpi_operand_object *length_desc,
114 union acpi_operand_object *result_desc)
122 ACPI_FUNCTION_TRACE_PTR(ds_init_buffer_field, obj_desc);
124 /* Host object must be a Buffer */
126 if (buffer_desc->common.type != ACPI_TYPE_BUFFER) {
128 "Target of Create Field is not a Buffer object - %s",
129 acpi_ut_get_object_type_name(buffer_desc)));
131 status = AE_AML_OPERAND_TYPE;
136 * The last parameter to all of these opcodes (result_desc) started
137 * out as a name_string, and should therefore now be a NS node
138 * after resolution in acpi_ex_resolve_operands().
140 if (ACPI_GET_DESCRIPTOR_TYPE(result_desc) != ACPI_DESC_TYPE_NAMED) {
142 "(%s) destination not a NS Node [%s]",
143 acpi_ps_get_opcode_name(aml_opcode),
144 acpi_ut_get_descriptor_name(result_desc)));
146 status = AE_AML_OPERAND_TYPE;
150 offset = (u32) offset_desc->integer.value;
153 * Setup the Bit offsets and counts, according to the opcode
155 switch (aml_opcode) {
156 case AML_CREATE_FIELD_OP:
158 /* Offset is in bits, count is in bits */
160 field_flags = AML_FIELD_ACCESS_BYTE;
162 bit_count = (u32) length_desc->integer.value;
164 /* Must have a valid (>0) bit count */
166 if (bit_count == 0) {
168 "Attempt to CreateField of length zero"));
169 status = AE_AML_OPERAND_VALUE;
174 case AML_CREATE_BIT_FIELD_OP:
176 /* Offset is in bits, Field is one bit */
180 field_flags = AML_FIELD_ACCESS_BYTE;
183 case AML_CREATE_BYTE_FIELD_OP:
185 /* Offset is in bytes, field is one byte */
187 bit_offset = 8 * offset;
189 field_flags = AML_FIELD_ACCESS_BYTE;
192 case AML_CREATE_WORD_FIELD_OP:
194 /* Offset is in bytes, field is one word */
196 bit_offset = 8 * offset;
198 field_flags = AML_FIELD_ACCESS_WORD;
201 case AML_CREATE_DWORD_FIELD_OP:
203 /* Offset is in bytes, field is one dword */
205 bit_offset = 8 * offset;
207 field_flags = AML_FIELD_ACCESS_DWORD;
210 case AML_CREATE_QWORD_FIELD_OP:
212 /* Offset is in bytes, field is one qword */
214 bit_offset = 8 * offset;
216 field_flags = AML_FIELD_ACCESS_QWORD;
222 "Unknown field creation opcode 0x%02X",
224 status = AE_AML_BAD_OPCODE;
228 /* Entire field must fit within the current length of the buffer */
230 if ((bit_offset + bit_count) > (8 * (u32) buffer_desc->buffer.length)) {
232 "Field [%4.4s] at %u exceeds Buffer [%4.4s] size %u (bits)",
233 acpi_ut_get_node_name(result_desc),
234 bit_offset + bit_count,
235 acpi_ut_get_node_name(buffer_desc->buffer.node),
236 8 * (u32) buffer_desc->buffer.length));
237 status = AE_AML_BUFFER_LIMIT;
242 * Initialize areas of the field object that are common to all fields
243 * For field_flags, use LOCK_RULE = 0 (NO_LOCK),
244 * UPDATE_RULE = 0 (UPDATE_PRESERVE)
246 status = acpi_ex_prep_common_field_object(obj_desc, field_flags, 0,
247 bit_offset, bit_count);
248 if (ACPI_FAILURE(status)) {
252 obj_desc->buffer_field.buffer_obj = buffer_desc;
254 /* Reference count for buffer_desc inherits obj_desc count */
256 buffer_desc->common.reference_count = (u16)
257 (buffer_desc->common.reference_count +
258 obj_desc->common.reference_count);
262 /* Always delete the operands */
264 acpi_ut_remove_reference(offset_desc);
265 acpi_ut_remove_reference(buffer_desc);
267 if (aml_opcode == AML_CREATE_FIELD_OP) {
268 acpi_ut_remove_reference(length_desc);
271 /* On failure, delete the result descriptor */
273 if (ACPI_FAILURE(status)) {
274 acpi_ut_remove_reference(result_desc); /* Result descriptor */
276 /* Now the address and length are valid for this buffer_field */
278 obj_desc->buffer_field.flags |= AOPOBJ_DATA_VALID;
281 return_ACPI_STATUS(status);
284 /*******************************************************************************
286 * FUNCTION: acpi_ds_eval_buffer_field_operands
288 * PARAMETERS: walk_state - Current walk
289 * op - A valid buffer_field Op object
293 * DESCRIPTION: Get buffer_field Buffer and Index
294 * Called from acpi_ds_exec_end_op during buffer_field parse tree walk
296 ******************************************************************************/
299 acpi_ds_eval_buffer_field_operands(struct acpi_walk_state *walk_state,
300 union acpi_parse_object *op)
303 union acpi_operand_object *obj_desc;
304 struct acpi_namespace_node *node;
305 union acpi_parse_object *next_op;
307 ACPI_FUNCTION_TRACE_PTR(ds_eval_buffer_field_operands, op);
310 * This is where we evaluate the address and length fields of the
311 * create_xxx_field declaration
313 node = op->common.node;
315 /* next_op points to the op that holds the Buffer */
317 next_op = op->common.value.arg;
319 /* Evaluate/create the address and length operands */
321 status = acpi_ds_create_operands(walk_state, next_op);
322 if (ACPI_FAILURE(status)) {
323 return_ACPI_STATUS(status);
326 obj_desc = acpi_ns_get_attached_object(node);
328 return_ACPI_STATUS(AE_NOT_EXIST);
331 /* Resolve the operands */
333 status = acpi_ex_resolve_operands(op->common.aml_opcode,
334 ACPI_WALK_OPERANDS, walk_state);
335 if (ACPI_FAILURE(status)) {
336 ACPI_ERROR((AE_INFO, "(%s) bad operand(s), status 0x%X",
337 acpi_ps_get_opcode_name(op->common.aml_opcode),
340 return_ACPI_STATUS(status);
343 /* Initialize the Buffer Field */
345 if (op->common.aml_opcode == AML_CREATE_FIELD_OP) {
347 /* NOTE: Slightly different operands for this opcode */
350 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
351 walk_state->operands[0],
352 walk_state->operands[1],
353 walk_state->operands[2],
354 walk_state->operands[3]);
356 /* All other, create_xxx_field opcodes */
359 acpi_ds_init_buffer_field(op->common.aml_opcode, obj_desc,
360 walk_state->operands[0],
361 walk_state->operands[1], NULL,
362 walk_state->operands[2]);
365 return_ACPI_STATUS(status);
368 /*******************************************************************************
370 * FUNCTION: acpi_ds_eval_region_operands
372 * PARAMETERS: walk_state - Current walk
373 * op - A valid region Op object
377 * DESCRIPTION: Get region address and length
378 * Called from acpi_ds_exec_end_op during op_region parse tree walk
380 ******************************************************************************/
383 acpi_ds_eval_region_operands(struct acpi_walk_state *walk_state,
384 union acpi_parse_object *op)
387 union acpi_operand_object *obj_desc;
388 union acpi_operand_object *operand_desc;
389 struct acpi_namespace_node *node;
390 union acpi_parse_object *next_op;
392 ACPI_FUNCTION_TRACE_PTR(ds_eval_region_operands, op);
395 * This is where we evaluate the address and length fields of the
396 * op_region declaration
398 node = op->common.node;
400 /* next_op points to the op that holds the space_ID */
402 next_op = op->common.value.arg;
404 /* next_op points to address op */
406 next_op = next_op->common.next;
408 /* Evaluate/create the address and length operands */
410 status = acpi_ds_create_operands(walk_state, next_op);
411 if (ACPI_FAILURE(status)) {
412 return_ACPI_STATUS(status);
415 /* Resolve the length and address operands to numbers */
417 status = acpi_ex_resolve_operands(op->common.aml_opcode,
418 ACPI_WALK_OPERANDS, walk_state);
419 if (ACPI_FAILURE(status)) {
420 return_ACPI_STATUS(status);
423 obj_desc = acpi_ns_get_attached_object(node);
425 return_ACPI_STATUS(AE_NOT_EXIST);
429 * Get the length operand and save it
432 operand_desc = walk_state->operands[walk_state->num_operands - 1];
434 obj_desc->region.length = (u32) operand_desc->integer.value;
435 acpi_ut_remove_reference(operand_desc);
438 * Get the address and save it
439 * (at top of stack - 1)
441 operand_desc = walk_state->operands[walk_state->num_operands - 2];
443 obj_desc->region.address = (acpi_physical_address)
444 operand_desc->integer.value;
445 acpi_ut_remove_reference(operand_desc);
447 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
449 ACPI_FORMAT_UINT64(obj_desc->region.address),
450 obj_desc->region.length));
452 /* Now the address and length are valid for this opregion */
454 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
456 return_ACPI_STATUS(status);
459 /*******************************************************************************
461 * FUNCTION: acpi_ds_eval_table_region_operands
463 * PARAMETERS: walk_state - Current walk
464 * op - A valid region Op object
468 * DESCRIPTION: Get region address and length.
469 * Called from acpi_ds_exec_end_op during data_table_region parse
472 ******************************************************************************/
475 acpi_ds_eval_table_region_operands(struct acpi_walk_state *walk_state,
476 union acpi_parse_object *op)
479 union acpi_operand_object *obj_desc;
480 union acpi_operand_object **operand;
481 struct acpi_namespace_node *node;
482 union acpi_parse_object *next_op;
483 struct acpi_table_header *table;
486 ACPI_FUNCTION_TRACE_PTR(ds_eval_table_region_operands, op);
489 * This is where we evaluate the Signature string, oem_id string,
490 * and oem_table_id string of the Data Table Region declaration
492 node = op->common.node;
494 /* next_op points to Signature string op */
496 next_op = op->common.value.arg;
499 * Evaluate/create the Signature string, oem_id string,
500 * and oem_table_id string operands
502 status = acpi_ds_create_operands(walk_state, next_op);
503 if (ACPI_FAILURE(status)) {
504 return_ACPI_STATUS(status);
507 operand = &walk_state->operands[0];
510 * Resolve the Signature string, oem_id string,
511 * and oem_table_id string operands
513 status = acpi_ex_resolve_operands(op->common.aml_opcode,
514 ACPI_WALK_OPERANDS, walk_state);
515 if (ACPI_FAILURE(status)) {
519 /* Find the ACPI table */
521 status = acpi_tb_find_table(operand[0]->string.pointer,
522 operand[1]->string.pointer,
523 operand[2]->string.pointer, &table_index);
524 if (ACPI_FAILURE(status)) {
525 if (status == AE_NOT_FOUND) {
527 "ACPI Table [%4.4s] OEM:(%s, %s) not found in RSDT/XSDT",
528 operand[0]->string.pointer,
529 operand[1]->string.pointer,
530 operand[2]->string.pointer));
535 status = acpi_get_table_by_index(table_index, &table);
536 if (ACPI_FAILURE(status)) {
540 obj_desc = acpi_ns_get_attached_object(node);
542 status = AE_NOT_EXIST;
546 obj_desc->region.address = ACPI_PTR_TO_PHYSADDR(table);
547 obj_desc->region.length = table->length;
549 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "RgnObj %p Addr %8.8X%8.8X Len %X\n",
551 ACPI_FORMAT_UINT64(obj_desc->region.address),
552 obj_desc->region.length));
554 /* Now the address and length are valid for this opregion */
556 obj_desc->region.flags |= AOPOBJ_DATA_VALID;
559 acpi_ut_remove_reference(operand[0]);
560 acpi_ut_remove_reference(operand[1]);
561 acpi_ut_remove_reference(operand[2]);
563 return_ACPI_STATUS(status);
566 /*******************************************************************************
568 * FUNCTION: acpi_ds_eval_data_object_operands
570 * PARAMETERS: walk_state - Current walk
571 * op - A valid data_object Op object
572 * obj_desc - data_object
576 * DESCRIPTION: Get the operands and complete the following data object types:
579 ******************************************************************************/
582 acpi_ds_eval_data_object_operands(struct acpi_walk_state *walk_state,
583 union acpi_parse_object *op,
584 union acpi_operand_object *obj_desc)
587 union acpi_operand_object *arg_desc;
590 ACPI_FUNCTION_TRACE(ds_eval_data_object_operands);
592 /* The first operand (for all of these data objects) is the length */
595 * Set proper index into operand stack for acpi_ds_obj_stack_push
596 * invoked inside acpi_ds_create_operand.
598 walk_state->operand_index = walk_state->num_operands;
600 status = acpi_ds_create_operand(walk_state, op->common.value.arg, 1);
601 if (ACPI_FAILURE(status)) {
602 return_ACPI_STATUS(status);
605 status = acpi_ex_resolve_operands(walk_state->opcode,
607 operands[walk_state->num_operands -
609 if (ACPI_FAILURE(status)) {
610 return_ACPI_STATUS(status);
613 /* Extract length operand */
615 arg_desc = walk_state->operands[walk_state->num_operands - 1];
616 length = (u32) arg_desc->integer.value;
618 /* Cleanup for length operand */
620 status = acpi_ds_obj_stack_pop(1, walk_state);
621 if (ACPI_FAILURE(status)) {
622 return_ACPI_STATUS(status);
625 acpi_ut_remove_reference(arg_desc);
628 * Create the actual data object
630 switch (op->common.aml_opcode) {
634 acpi_ds_build_internal_buffer_obj(walk_state, op, length,
639 case AML_VAR_PACKAGE_OP:
642 acpi_ds_build_internal_package_obj(walk_state, op, length,
648 return_ACPI_STATUS(AE_AML_BAD_OPCODE);
651 if (ACPI_SUCCESS(status)) {
653 * Return the object in the walk_state, unless the parent is a package -
654 * in this case, the return object will be stored in the parse tree
657 if ((!op->common.parent) ||
658 ((op->common.parent->common.aml_opcode != AML_PACKAGE_OP) &&
659 (op->common.parent->common.aml_opcode !=
661 && (op->common.parent->common.aml_opcode !=
663 walk_state->result_obj = obj_desc;
667 return_ACPI_STATUS(status);
670 /*******************************************************************************
672 * FUNCTION: acpi_ds_eval_bank_field_operands
674 * PARAMETERS: walk_state - Current walk
675 * op - A valid bank_field Op object
679 * DESCRIPTION: Get bank_field bank_value
680 * Called from acpi_ds_exec_end_op during bank_field parse tree walk
682 ******************************************************************************/
685 acpi_ds_eval_bank_field_operands(struct acpi_walk_state *walk_state,
686 union acpi_parse_object *op)
689 union acpi_operand_object *obj_desc;
690 union acpi_operand_object *operand_desc;
691 struct acpi_namespace_node *node;
692 union acpi_parse_object *next_op;
693 union acpi_parse_object *arg;
695 ACPI_FUNCTION_TRACE_PTR(ds_eval_bank_field_operands, op);
698 * This is where we evaluate the bank_value field of the
699 * bank_field declaration
702 /* next_op points to the op that holds the Region */
704 next_op = op->common.value.arg;
706 /* next_op points to the op that holds the Bank Register */
708 next_op = next_op->common.next;
710 /* next_op points to the op that holds the Bank Value */
712 next_op = next_op->common.next;
715 * Set proper index into operand stack for acpi_ds_obj_stack_push
716 * invoked inside acpi_ds_create_operand.
718 * We use walk_state->Operands[0] to store the evaluated bank_value
720 walk_state->operand_index = 0;
722 status = acpi_ds_create_operand(walk_state, next_op, 0);
723 if (ACPI_FAILURE(status)) {
724 return_ACPI_STATUS(status);
727 status = acpi_ex_resolve_to_value(&walk_state->operands[0], walk_state);
728 if (ACPI_FAILURE(status)) {
729 return_ACPI_STATUS(status);
732 ACPI_DUMP_OPERANDS(ACPI_WALK_OPERANDS,
733 acpi_ps_get_opcode_name(op->common.aml_opcode), 1);
735 * Get the bank_value operand and save it
738 operand_desc = walk_state->operands[0];
740 /* Arg points to the start Bank Field */
742 arg = acpi_ps_get_arg(op, 4);
745 /* Ignore OFFSET and ACCESSAS terms here */
747 if (arg->common.aml_opcode == AML_INT_NAMEDFIELD_OP) {
748 node = arg->common.node;
750 obj_desc = acpi_ns_get_attached_object(node);
752 return_ACPI_STATUS(AE_NOT_EXIST);
755 obj_desc->bank_field.value =
756 (u32) operand_desc->integer.value;
759 /* Move to next field in the list */
761 arg = arg->common.next;
764 acpi_ut_remove_reference(operand_desc);
765 return_ACPI_STATUS(status);