728 lines
18 KiB
C
728 lines
18 KiB
C
// 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 - 2018, Intel Corp.
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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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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME("dswexec")
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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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* 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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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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ACPI_FUNCTION_TRACE_PTR(ds_get_predicate_value, walk_state);
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walk_state->control_state->common.state = 0;
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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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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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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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obj_desc = walk_state->operands[0];
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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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return_ACPI_STATUS(AE_AML_NO_OPERAND);
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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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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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status = AE_AML_OPERAND_TYPE;
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goto cleanup;
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}
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/* Truncate the predicate to 32-bits if necessary */
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(void)acpi_ex_truncate_for32bit_table(local_obj_desc);
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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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/* 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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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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/* 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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* 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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* 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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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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ACPI_FUNCTION_TRACE_PTR(ds_exec_begin_op, walk_state);
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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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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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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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* 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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/* 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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/* 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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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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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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/* 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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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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case AML_CLASS_EXECUTE: /* Most operators with arguments */
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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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* 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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/* 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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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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/* Always delete the argument objects and clear the operand stack */
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acpi_ds_clear_operands(walk_state);
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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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switch (op_type) {
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case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */
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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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break;
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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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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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ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
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"Method invocation, Op=%p\n", op));
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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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next_op = first_arg;
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/* next_op points to first argument op */
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next_op = next_op->common.next;
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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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* 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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/* On error, clear all resolved operands */
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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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* 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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* 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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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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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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status =
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acpi_ds_eval_buffer_field_operands(walk_state, op);
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break;
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case AML_TYPE_CREATE_OBJECT:
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ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
|
|
"Executing CreateObject (Buffer/Package) Op=%p Child=%p ParentOpcode=%4.4X\n",
|
|
op, op->named.value.arg,
|
|
op->common.parent->common.
|
|
aml_opcode));
|
|
|
|
switch (op->common.parent->common.aml_opcode) {
|
|
case AML_NAME_OP:
|
|
/*
|
|
* Put the Node on the object stack (Contains the ACPI Name
|
|
* of this object)
|
|
*/
|
|
walk_state->operands[0] = (void *)
|
|
op->common.parent->common.node;
|
|
walk_state->num_operands = 1;
|
|
|
|
status = acpi_ds_create_node(walk_state,
|
|
op->common.parent->
|
|
common.node,
|
|
op->common.parent);
|
|
if (ACPI_FAILURE(status)) {
|
|
break;
|
|
}
|
|
|
|
/* Fall through */
|
|
/*lint -fallthrough */
|
|
|
|
case AML_INT_EVAL_SUBTREE_OP:
|
|
|
|
status =
|
|
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);
|
|
}
|