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759 lines
19 KiB
759 lines
19 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: dswexec - Dispatcher method execution callbacks; |
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* dispatch to interpreter. |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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|
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#include <acpi/acpi.h> |
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#include "accommon.h" |
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#include "acparser.h" |
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#include "amlcode.h" |
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#include "acdispat.h" |
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#include "acinterp.h" |
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#include "acnamesp.h" |
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#include "acdebug.h" |
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#ifdef ACPI_EXEC_APP |
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#include "aecommon.h" |
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#endif |
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|
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#define _COMPONENT ACPI_DISPATCHER |
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ACPI_MODULE_NAME("dswexec") |
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|
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/* |
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* Dispatch table for opcode classes |
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*/ |
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static acpi_execute_op acpi_gbl_op_type_dispatch[] = { |
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acpi_ex_opcode_0A_0T_1R, |
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acpi_ex_opcode_1A_0T_0R, |
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acpi_ex_opcode_1A_0T_1R, |
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acpi_ex_opcode_1A_1T_0R, |
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acpi_ex_opcode_1A_1T_1R, |
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acpi_ex_opcode_2A_0T_0R, |
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acpi_ex_opcode_2A_0T_1R, |
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acpi_ex_opcode_2A_1T_1R, |
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acpi_ex_opcode_2A_2T_1R, |
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acpi_ex_opcode_3A_0T_0R, |
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acpi_ex_opcode_3A_1T_1R, |
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acpi_ex_opcode_6A_0T_1R |
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}; |
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|
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/***************************************************************************** |
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* |
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* FUNCTION: acpi_ds_get_predicate_value |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* result_obj - if non-zero, pop result from result stack |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Get the result of a predicate evaluation |
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* |
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****************************************************************************/ |
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|
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acpi_status |
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acpi_ds_get_predicate_value(struct acpi_walk_state *walk_state, |
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union acpi_operand_object *result_obj) |
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{ |
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acpi_status status = AE_OK; |
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union acpi_operand_object *obj_desc; |
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union acpi_operand_object *local_obj_desc = NULL; |
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|
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ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state); |
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|
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walk_state->control_state->common.state = 0; |
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|
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if (result_obj) { |
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status = acpi_ds_result_pop(&obj_desc, walk_state); |
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if (ACPI_FAILURE(status)) { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"Could not get result from predicate evaluation")); |
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|
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return_ACPI_STATUS(status); |
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} |
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} else { |
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status = acpi_ds_create_operand(walk_state, walk_state->op, 0); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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|
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status = |
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acpi_ex_resolve_to_value(&walk_state->operands[0], |
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walk_state); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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|
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obj_desc = walk_state->operands[0]; |
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} |
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|
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if (!obj_desc) { |
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ACPI_ERROR((AE_INFO, |
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"No predicate ObjDesc=%p State=%p", |
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obj_desc, walk_state)); |
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|
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return_ACPI_STATUS(AE_AML_NO_OPERAND); |
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} |
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|
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/* |
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* Result of predicate evaluation must be an Integer |
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* object. Implicitly convert the argument if necessary. |
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*/ |
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status = acpi_ex_convert_to_integer(obj_desc, &local_obj_desc, |
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ACPI_IMPLICIT_CONVERSION); |
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if (ACPI_FAILURE(status)) { |
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goto cleanup; |
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} |
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|
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if (local_obj_desc->common.type != ACPI_TYPE_INTEGER) { |
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ACPI_ERROR((AE_INFO, |
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"Bad predicate (not an integer) ObjDesc=%p State=%p Type=0x%X", |
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obj_desc, walk_state, obj_desc->common.type)); |
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|
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status = AE_AML_OPERAND_TYPE; |
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goto cleanup; |
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} |
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|
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/* Truncate the predicate to 32-bits if necessary */ |
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|
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(void)acpi_ex_truncate_for32bit_table(local_obj_desc); |
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|
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/* |
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* Save the result of the predicate evaluation on |
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* the control stack |
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*/ |
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if (local_obj_desc->integer.value) { |
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walk_state->control_state->common.value = TRUE; |
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} else { |
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/* |
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* Predicate is FALSE, we will just toss the |
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* rest of the package |
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*/ |
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walk_state->control_state->common.value = FALSE; |
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status = AE_CTRL_FALSE; |
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} |
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|
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/* Predicate can be used for an implicit return value */ |
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(void)acpi_ds_do_implicit_return(local_obj_desc, walk_state, TRUE); |
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cleanup: |
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|
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Completed a predicate eval=%X Op=%p\n", |
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walk_state->control_state->common.value, |
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walk_state->op)); |
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|
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/* Break to debugger to display result */ |
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acpi_db_display_result_object(local_obj_desc, walk_state); |
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|
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/* |
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* Delete the predicate result object (we know that |
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* we don't need it anymore) |
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*/ |
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if (local_obj_desc != obj_desc) { |
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acpi_ut_remove_reference(local_obj_desc); |
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} |
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acpi_ut_remove_reference(obj_desc); |
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walk_state->control_state->common.state = ACPI_CONTROL_NORMAL; |
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return_ACPI_STATUS(status); |
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} |
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|
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/***************************************************************************** |
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* |
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* FUNCTION: acpi_ds_exec_begin_op |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* out_op - Where to return op if a new one is created |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Descending callback used during the execution of control |
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* methods. This is where most operators and operands are |
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* dispatched to the interpreter. |
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* |
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****************************************************************************/ |
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|
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acpi_status |
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acpi_ds_exec_begin_op(struct acpi_walk_state *walk_state, |
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union acpi_parse_object **out_op) |
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{ |
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union acpi_parse_object *op; |
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acpi_status status = AE_OK; |
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u32 opcode_class; |
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|
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ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state); |
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|
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op = walk_state->op; |
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if (!op) { |
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status = acpi_ds_load2_begin_op(walk_state, out_op); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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op = *out_op; |
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walk_state->op = op; |
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walk_state->opcode = op->common.aml_opcode; |
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walk_state->op_info = |
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acpi_ps_get_opcode_info(op->common.aml_opcode); |
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|
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if (acpi_ns_opens_scope(walk_state->op_info->object_type)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"(%s) Popping scope for Op %p\n", |
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acpi_ut_get_type_name(walk_state-> |
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op_info-> |
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object_type), |
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op)); |
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status = acpi_ds_scope_stack_pop(walk_state); |
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if (ACPI_FAILURE(status)) { |
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goto error_exit; |
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} |
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} |
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} |
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|
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if (op == walk_state->origin) { |
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if (out_op) { |
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*out_op = op; |
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} |
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return_ACPI_STATUS(AE_OK); |
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} |
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|
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/* |
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* If the previous opcode was a conditional, this opcode |
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* must be the beginning of the associated predicate. |
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* Save this knowledge in the current scope descriptor |
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*/ |
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if ((walk_state->control_state) && |
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(walk_state->control_state->common.state == |
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ACPI_CONTROL_CONDITIONAL_EXECUTING)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Exec predicate Op=%p State=%p\n", |
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op, walk_state)); |
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walk_state->control_state->common.state = |
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ACPI_CONTROL_PREDICATE_EXECUTING; |
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|
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/* Save start of predicate */ |
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walk_state->control_state->control.predicate_op = op; |
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} |
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opcode_class = walk_state->op_info->class; |
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|
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/* We want to send namepaths to the load code */ |
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if (op->common.aml_opcode == AML_INT_NAMEPATH_OP) { |
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opcode_class = AML_CLASS_NAMED_OBJECT; |
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} |
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/* |
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* Handle the opcode based upon the opcode type |
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*/ |
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switch (opcode_class) { |
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case AML_CLASS_CONTROL: |
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status = acpi_ds_exec_begin_control_op(walk_state, op); |
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break; |
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case AML_CLASS_NAMED_OBJECT: |
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if (walk_state->walk_type & ACPI_WALK_METHOD) { |
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/* |
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* Found a named object declaration during method execution; |
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* we must enter this object into the namespace. The created |
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* object is temporary and will be deleted upon completion of |
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* the execution of this method. |
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* |
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* Note 10/2010: Except for the Scope() op. This opcode does |
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* not actually create a new object, it refers to an existing |
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* object. However, for Scope(), we want to indeed open a |
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* new scope. |
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*/ |
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if (op->common.aml_opcode != AML_SCOPE_OP) { |
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status = |
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acpi_ds_load2_begin_op(walk_state, NULL); |
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} else { |
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status = |
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acpi_ds_scope_stack_push(op->named.node, |
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op->named.node-> |
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type, walk_state); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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} |
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} |
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break; |
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case AML_CLASS_EXECUTE: |
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case AML_CLASS_CREATE: |
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break; |
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default: |
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break; |
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} |
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/* Nothing to do here during method execution */ |
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return_ACPI_STATUS(status); |
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error_exit: |
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status = acpi_ds_method_error(status, walk_state); |
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return_ACPI_STATUS(status); |
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} |
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/***************************************************************************** |
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* |
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* FUNCTION: acpi_ds_exec_end_op |
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* |
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* PARAMETERS: walk_state - Current state of the parse tree walk |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Ascending callback used during the execution of control |
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* methods. The only thing we really need to do here is to |
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* notice the beginning of IF, ELSE, and WHILE blocks. |
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* |
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****************************************************************************/ |
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|
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acpi_status acpi_ds_exec_end_op(struct acpi_walk_state *walk_state) |
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{ |
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union acpi_parse_object *op; |
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acpi_status status = AE_OK; |
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u32 op_type; |
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u32 op_class; |
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union acpi_parse_object *next_op; |
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union acpi_parse_object *first_arg; |
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#ifdef ACPI_EXEC_APP |
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char *namepath; |
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union acpi_operand_object *obj_desc; |
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#endif |
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ACPI_FUNCTION_TRACE_PTR(ds_exec_end_op, walk_state); |
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op = walk_state->op; |
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op_type = walk_state->op_info->type; |
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op_class = walk_state->op_info->class; |
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if (op_class == AML_CLASS_UNKNOWN) { |
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ACPI_ERROR((AE_INFO, "Unknown opcode 0x%X", |
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op->common.aml_opcode)); |
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return_ACPI_STATUS(AE_NOT_IMPLEMENTED); |
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} |
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first_arg = op->common.value.arg; |
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|
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/* Init the walk state */ |
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walk_state->num_operands = 0; |
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walk_state->operand_index = 0; |
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walk_state->return_desc = NULL; |
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walk_state->result_obj = NULL; |
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/* Call debugger for single step support (DEBUG build only) */ |
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status = acpi_db_single_step(walk_state, op, op_class); |
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if (ACPI_FAILURE(status)) { |
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return_ACPI_STATUS(status); |
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} |
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/* Decode the Opcode Class */ |
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|
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switch (op_class) { |
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case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */ |
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if (walk_state->opcode == AML_INT_NAMEPATH_OP) { |
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status = acpi_ds_evaluate_name_path(walk_state); |
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if (ACPI_FAILURE(status)) { |
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goto cleanup; |
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} |
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} |
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break; |
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|
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case AML_CLASS_EXECUTE: /* Most operators with arguments */ |
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|
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/* Build resolved operand stack */ |
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status = acpi_ds_create_operands(walk_state, first_arg); |
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if (ACPI_FAILURE(status)) { |
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goto cleanup; |
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} |
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|
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/* |
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* All opcodes require operand resolution, with the only exceptions |
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* being the object_type and size_of operators. |
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*/ |
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if (!(walk_state->op_info->flags & AML_NO_OPERAND_RESOLVE)) { |
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|
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/* Resolve all operands */ |
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status = acpi_ex_resolve_operands(walk_state->opcode, |
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&(walk_state-> |
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operands |
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[walk_state-> |
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num_operands - 1]), |
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walk_state); |
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} |
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|
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if (ACPI_SUCCESS(status)) { |
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/* |
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* Dispatch the request to the appropriate interpreter handler |
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* routine. There is one routine per opcode "type" based upon the |
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* number of opcode arguments and return type. |
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*/ |
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status = |
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acpi_gbl_op_type_dispatch[op_type] (walk_state); |
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} else { |
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/* |
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* Treat constructs of the form "Store(LocalX,LocalX)" as noops when the |
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* Local is uninitialized. |
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*/ |
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if ((status == AE_AML_UNINITIALIZED_LOCAL) && |
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(walk_state->opcode == AML_STORE_OP) && |
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(walk_state->operands[0]->common.type == |
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ACPI_TYPE_LOCAL_REFERENCE) |
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&& (walk_state->operands[1]->common.type == |
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ACPI_TYPE_LOCAL_REFERENCE) |
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&& (walk_state->operands[0]->reference.class == |
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walk_state->operands[1]->reference.class) |
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&& (walk_state->operands[0]->reference.value == |
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walk_state->operands[1]->reference.value)) { |
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status = AE_OK; |
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} else { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"While resolving operands for [%s]", |
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acpi_ps_get_opcode_name |
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(walk_state->opcode))); |
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} |
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} |
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|
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/* Always delete the argument objects and clear the operand stack */ |
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|
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acpi_ds_clear_operands(walk_state); |
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|
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/* |
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* If a result object was returned from above, push it on the |
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* current result stack |
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*/ |
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if (ACPI_SUCCESS(status) && walk_state->result_obj) { |
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status = |
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acpi_ds_result_push(walk_state->result_obj, |
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walk_state); |
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} |
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break; |
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default: |
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|
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switch (op_type) { |
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case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */ |
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|
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/* 1 Operand, 0 external_result, 0 internal_result */ |
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status = acpi_ds_exec_end_control_op(walk_state, op); |
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|
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break; |
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|
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case AML_TYPE_METHOD_CALL: |
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/* |
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* If the method is referenced from within a package |
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* declaration, it is not a invocation of the method, just |
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* a reference to it. |
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*/ |
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if ((op->asl.parent) && |
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((op->asl.parent->asl.aml_opcode == AML_PACKAGE_OP) |
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|| (op->asl.parent->asl.aml_opcode == |
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AML_VARIABLE_PACKAGE_OP))) { |
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"Method Reference in a Package, Op=%p\n", |
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op)); |
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|
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op->common.node = (struct acpi_namespace_node *) |
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op->asl.value.arg->asl.node; |
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acpi_ut_add_reference(op->asl.value.arg->asl. |
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node->object); |
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return_ACPI_STATUS(AE_OK); |
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} |
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|
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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
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"Method invocation, Op=%p\n", op)); |
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|
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/* |
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* (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains |
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* the method Node pointer |
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*/ |
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/* next_op points to the op that holds the method name */ |
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|
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next_op = first_arg; |
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|
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/* next_op points to first argument op */ |
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|
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next_op = next_op->common.next; |
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|
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/* |
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* Get the method's arguments and put them on the operand stack |
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*/ |
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status = acpi_ds_create_operands(walk_state, next_op); |
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if (ACPI_FAILURE(status)) { |
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break; |
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} |
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|
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/* |
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* Since the operands will be passed to another control method, |
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* we must resolve all local references here (Local variables, |
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* arguments to *this* method, etc.) |
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*/ |
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status = acpi_ds_resolve_operands(walk_state); |
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if (ACPI_FAILURE(status)) { |
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|
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/* On error, clear all resolved operands */ |
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|
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acpi_ds_clear_operands(walk_state); |
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break; |
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} |
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|
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/* |
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* Tell the walk loop to preempt this running method and |
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* execute the new method |
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*/ |
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status = AE_CTRL_TRANSFER; |
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|
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/* |
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* Return now; we don't want to disturb anything, |
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* especially the operand count! |
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*/ |
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return_ACPI_STATUS(status); |
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|
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case AML_TYPE_CREATE_FIELD: |
|
|
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Executing CreateField Buffer/Index Op=%p\n", |
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op)); |
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|
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status = acpi_ds_load2_end_op(walk_state); |
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if (ACPI_FAILURE(status)) { |
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break; |
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} |
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|
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status = |
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acpi_ds_eval_buffer_field_operands(walk_state, op); |
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if (ACPI_FAILURE(status)) { |
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break; |
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} |
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#ifdef ACPI_EXEC_APP |
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/* |
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* acpi_exec support for namespace initialization file (initialize |
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* buffer_fields in this code.) |
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*/ |
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namepath = |
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acpi_ns_get_external_pathname(op->common.node); |
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status = ae_lookup_init_file_entry(namepath, &obj_desc); |
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if (ACPI_SUCCESS(status)) { |
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status = |
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acpi_ex_write_data_to_field(obj_desc, |
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op->common. |
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node->object, |
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NULL); |
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if ACPI_FAILURE |
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(status) { |
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ACPI_EXCEPTION((AE_INFO, status, |
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"While writing to buffer field")); |
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} |
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} |
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ACPI_FREE(namepath); |
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status = AE_OK; |
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#endif |
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break; |
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|
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case AML_TYPE_CREATE_OBJECT: |
|
|
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
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"Executing CreateObject (Buffer/Package) Op=%p Child=%p ParentOpcode=%4.4X\n", |
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op, op->named.value.arg, |
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op->common.parent->common. |
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aml_opcode)); |
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|
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switch (op->common.parent->common.aml_opcode) { |
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case AML_NAME_OP: |
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/* |
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* Put the Node on the object stack (Contains the ACPI Name |
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* of this object) |
|
*/ |
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walk_state->operands[0] = (void *) |
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op->common.parent->common.node; |
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walk_state->num_operands = 1; |
|
|
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status = acpi_ds_create_node(walk_state, |
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op->common.parent-> |
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common.node, |
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op->common.parent); |
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if (ACPI_FAILURE(status)) { |
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break; |
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} |
|
|
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ACPI_FALLTHROUGH; |
|
|
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case AML_INT_EVAL_SUBTREE_OP: |
|
|
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status = |
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acpi_ds_eval_data_object_operands |
|
(walk_state, op, |
|
acpi_ns_get_attached_object(op->common. |
|
parent->common. |
|
node)); |
|
break; |
|
|
|
default: |
|
|
|
status = |
|
acpi_ds_eval_data_object_operands |
|
(walk_state, op, NULL); |
|
break; |
|
} |
|
|
|
/* |
|
* If a result object was returned from above, push it on the |
|
* current result stack |
|
*/ |
|
if (walk_state->result_obj) { |
|
status = |
|
acpi_ds_result_push(walk_state->result_obj, |
|
walk_state); |
|
} |
|
break; |
|
|
|
case AML_TYPE_NAMED_FIELD: |
|
case AML_TYPE_NAMED_COMPLEX: |
|
case AML_TYPE_NAMED_SIMPLE: |
|
case AML_TYPE_NAMED_NO_OBJ: |
|
|
|
status = acpi_ds_load2_end_op(walk_state); |
|
if (ACPI_FAILURE(status)) { |
|
break; |
|
} |
|
|
|
if (op->common.aml_opcode == AML_REGION_OP) { |
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
|
"Executing OpRegion Address/Length Op=%p\n", |
|
op)); |
|
|
|
status = |
|
acpi_ds_eval_region_operands(walk_state, |
|
op); |
|
if (ACPI_FAILURE(status)) { |
|
break; |
|
} |
|
} else if (op->common.aml_opcode == AML_DATA_REGION_OP) { |
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
|
"Executing DataTableRegion Strings Op=%p\n", |
|
op)); |
|
|
|
status = |
|
acpi_ds_eval_table_region_operands |
|
(walk_state, op); |
|
if (ACPI_FAILURE(status)) { |
|
break; |
|
} |
|
} else if (op->common.aml_opcode == AML_BANK_FIELD_OP) { |
|
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
|
"Executing BankField Op=%p\n", |
|
op)); |
|
|
|
status = |
|
acpi_ds_eval_bank_field_operands(walk_state, |
|
op); |
|
if (ACPI_FAILURE(status)) { |
|
break; |
|
} |
|
} |
|
break; |
|
|
|
case AML_TYPE_UNDEFINED: |
|
|
|
ACPI_ERROR((AE_INFO, |
|
"Undefined opcode type Op=%p", op)); |
|
return_ACPI_STATUS(AE_NOT_IMPLEMENTED); |
|
|
|
case AML_TYPE_BOGUS: |
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, |
|
"Internal opcode=%X type Op=%p\n", |
|
walk_state->opcode, op)); |
|
break; |
|
|
|
default: |
|
|
|
ACPI_ERROR((AE_INFO, |
|
"Unimplemented opcode, class=0x%X " |
|
"type=0x%X Opcode=0x%X Op=%p", |
|
op_class, op_type, op->common.aml_opcode, |
|
op)); |
|
|
|
status = AE_NOT_IMPLEMENTED; |
|
break; |
|
} |
|
} |
|
|
|
/* |
|
* ACPI 2.0 support for 64-bit integers: Truncate numeric |
|
* result value if we are executing from a 32-bit ACPI table |
|
*/ |
|
(void)acpi_ex_truncate_for32bit_table(walk_state->result_obj); |
|
|
|
/* |
|
* Check if we just completed the evaluation of a |
|
* conditional predicate |
|
*/ |
|
if ((ACPI_SUCCESS(status)) && |
|
(walk_state->control_state) && |
|
(walk_state->control_state->common.state == |
|
ACPI_CONTROL_PREDICATE_EXECUTING) && |
|
(walk_state->control_state->control.predicate_op == op)) { |
|
status = |
|
acpi_ds_get_predicate_value(walk_state, |
|
walk_state->result_obj); |
|
walk_state->result_obj = NULL; |
|
} |
|
|
|
cleanup: |
|
|
|
if (walk_state->result_obj) { |
|
|
|
/* Break to debugger to display result */ |
|
|
|
acpi_db_display_result_object(walk_state->result_obj, |
|
walk_state); |
|
|
|
/* |
|
* Delete the result op if and only if: |
|
* Parent will not use the result -- such as any |
|
* non-nested type2 op in a method (parent will be method) |
|
*/ |
|
acpi_ds_delete_result_if_not_used(op, walk_state->result_obj, |
|
walk_state); |
|
} |
|
#ifdef _UNDER_DEVELOPMENT |
|
|
|
if (walk_state->parser_state.aml == walk_state->parser_state.aml_end) { |
|
acpi_db_method_end(walk_state); |
|
} |
|
#endif |
|
|
|
/* Invoke exception handler on error */ |
|
|
|
if (ACPI_FAILURE(status)) { |
|
status = acpi_ds_method_error(status, walk_state); |
|
} |
|
|
|
/* Always clear the object stack */ |
|
|
|
walk_state->num_operands = 0; |
|
return_ACPI_STATUS(status); |
|
}
|
|
|