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646 lines
14 KiB
C
646 lines
14 KiB
C
/******************************************************************************
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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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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_DISPATCHER
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MODULE_NAME ("dswexec")
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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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*
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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 (
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ACPI_WALK_STATE *walk_state,
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ACPI_PARSE_OBJECT *op,
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u32 has_result_obj)
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{
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ACPI_STATUS status = AE_OK;
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ACPI_OPERAND_OBJECT *obj_desc;
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walk_state->control_state->common.state = 0;
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if (has_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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return (status);
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}
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}
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else {
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status = acpi_ds_create_operand (walk_state, op, 0);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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status = acpi_aml_resolve_to_value (&walk_state->operands [0], walk_state);
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if (ACPI_FAILURE (status)) {
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return (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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return (AE_AML_NO_OPERAND);
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}
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/*
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* Result of predicate evaluation currently must
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* be a number
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*/
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if (obj_desc->common.type != ACPI_TYPE_INTEGER) {
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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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acpi_aml_truncate_for32bit_table (obj_desc, walk_state);
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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 (obj_desc->integer.value) {
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walk_state->control_state->common.value = TRUE;
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}
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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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cleanup:
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/* Break to debugger to display result */
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DEBUGGER_EXEC (acpi_db_display_result_object (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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acpi_cm_remove_reference (obj_desc);
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walk_state->control_state->common.state = CONTROL_NORMAL;
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return (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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* Op - Op that has been just been reached in the
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* walk; Arguments have not been evaluated yet.
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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 (
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u16 opcode,
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ACPI_PARSE_OBJECT *op,
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ACPI_WALK_STATE *walk_state,
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ACPI_PARSE_OBJECT **out_op)
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{
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ACPI_OPCODE_INFO *op_info;
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ACPI_STATUS status = AE_OK;
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if (!op) {
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status = acpi_ds_load2_begin_op (opcode, NULL, walk_state, out_op);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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op = *out_op;
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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 (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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CONTROL_CONDITIONAL_EXECUTING)) {
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walk_state->control_state->common.state = 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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op_info = acpi_ps_get_opcode_info (op->opcode);
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/* We want to send namepaths to the load code */
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if (op->opcode == AML_NAMEPATH_OP) {
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op_info->flags = OPTYPE_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 (ACPI_GET_OP_CLASS (op_info)) {
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case OPTYPE_CONTROL:
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status = acpi_ds_result_stack_push (walk_state);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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status = acpi_ds_exec_begin_control_op (walk_state, op);
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break;
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case OPTYPE_NAMED_OBJECT:
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if (walk_state->walk_type == WALK_METHOD) {
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/*
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* Found a named object declaration during method
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* execution; we must enter this object into the
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* namespace. The created object is temporary and
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* will be deleted upon completion of the execution
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* of this method.
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*/
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status = acpi_ds_load2_begin_op (op->opcode, op, walk_state, NULL);
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}
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if (op->opcode == AML_REGION_OP) {
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status = acpi_ds_result_stack_push (walk_state);
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}
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break;
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/* most operators with arguments */
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case OPTYPE_MONADIC1:
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case OPTYPE_DYADIC1:
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case OPTYPE_MONADIC2:
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case OPTYPE_MONADIC2_r:
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case OPTYPE_DYADIC2:
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case OPTYPE_DYADIC2_r:
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case OPTYPE_DYADIC2_s:
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case OPTYPE_RECONFIGURATION:
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case OPTYPE_INDEX:
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case OPTYPE_MATCH:
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case OPTYPE_FATAL:
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case OPTYPE_CREATE_FIELD:
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/* Start a new result/operand state */
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status = acpi_ds_result_stack_push (walk_state);
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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 (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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* Op - Op that has been just been completed in the
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* walk; Arguments have now been evaluated.
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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
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acpi_ds_exec_end_op (
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ACPI_WALK_STATE *walk_state,
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ACPI_PARSE_OBJECT *op)
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{
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ACPI_STATUS status = AE_OK;
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u16 opcode;
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u8 optype;
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ACPI_PARSE_OBJECT *next_op;
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ACPI_NAMESPACE_NODE *node;
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ACPI_PARSE_OBJECT *first_arg;
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ACPI_OPERAND_OBJECT *result_obj = NULL;
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ACPI_OPCODE_INFO *op_info;
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u32 operand_index;
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opcode = (u16) op->opcode;
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op_info = acpi_ps_get_opcode_info (op->opcode);
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if (ACPI_GET_OP_TYPE (op_info) != ACPI_OP_TYPE_OPCODE) {
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return (AE_NOT_IMPLEMENTED);
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}
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optype = (u8) ACPI_GET_OP_CLASS (op_info);
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first_arg = op->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->return_desc = NULL;
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walk_state->op_info = op_info;
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walk_state->opcode = opcode;
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/* Call debugger for single step support (DEBUG build only) */
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DEBUGGER_EXEC (status = acpi_db_single_step (walk_state, op, optype));
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DEBUGGER_EXEC (if (ACPI_FAILURE (status)) {return (status);});
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/* Decode the opcode */
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switch (optype) {
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case OPTYPE_UNDEFINED:
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return (AE_NOT_IMPLEMENTED);
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break;
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case OPTYPE_BOGUS:
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break;
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case OPTYPE_CONSTANT: /* argument type only */
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case OPTYPE_LITERAL: /* argument type only */
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case OPTYPE_DATA_TERM: /* argument type only */
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case OPTYPE_LOCAL_VARIABLE: /* argument type only */
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case OPTYPE_METHOD_ARGUMENT: /* argument type only */
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break;
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/* most operators with arguments */
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case OPTYPE_MONADIC1:
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case OPTYPE_DYADIC1:
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case OPTYPE_MONADIC2:
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case OPTYPE_MONADIC2_r:
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case OPTYPE_DYADIC2:
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case OPTYPE_DYADIC2_r:
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case OPTYPE_DYADIC2_s:
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case OPTYPE_RECONFIGURATION:
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case OPTYPE_INDEX:
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case OPTYPE_MATCH:
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case OPTYPE_FATAL:
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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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operand_index = walk_state->num_operands - 1;
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/* Done with this result state (Now that operand stack is built) */
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status = acpi_ds_result_stack_pop (walk_state);
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if (ACPI_FAILURE (status)) {
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goto cleanup;
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}
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switch (optype) {
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case OPTYPE_MONADIC1:
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/* 1 Operand, 0 External_result, 0 Internal_result */
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status = acpi_aml_exec_monadic1 (opcode, walk_state);
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break;
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case OPTYPE_MONADIC2:
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/* 1 Operand, 0 External_result, 1 Internal_result */
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status = acpi_aml_exec_monadic2 (opcode, walk_state, &result_obj);
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break;
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case OPTYPE_MONADIC2_r:
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/* 1 Operand, 1 External_result, 1 Internal_result */
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status = acpi_aml_exec_monadic2_r (opcode, walk_state, &result_obj);
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break;
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case OPTYPE_DYADIC1:
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/* 2 Operands, 0 External_result, 0 Internal_result */
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status = acpi_aml_exec_dyadic1 (opcode, walk_state);
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break;
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case OPTYPE_DYADIC2:
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/* 2 Operands, 0 External_result, 1 Internal_result */
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status = acpi_aml_exec_dyadic2 (opcode, walk_state, &result_obj);
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break;
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case OPTYPE_DYADIC2_r:
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/* 2 Operands, 1 or 2 External_results, 1 Internal_result */
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status = acpi_aml_exec_dyadic2_r (opcode, walk_state, &result_obj);
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break;
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case OPTYPE_DYADIC2_s: /* Synchronization Operator */
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/* 2 Operands, 0 External_result, 1 Internal_result */
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status = acpi_aml_exec_dyadic2_s (opcode, walk_state, &result_obj);
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break;
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case OPTYPE_INDEX: /* Type 2 opcode with 3 operands */
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/* 3 Operands, 1 External_result, 1 Internal_result */
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status = acpi_aml_exec_index (walk_state, &result_obj);
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break;
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case OPTYPE_MATCH: /* Type 2 opcode with 6 operands */
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/* 6 Operands, 0 External_result, 1 Internal_result */
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status = acpi_aml_exec_match (walk_state, &result_obj);
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break;
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case OPTYPE_RECONFIGURATION:
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/* 1 or 2 operands, 0 Internal Result */
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status = acpi_aml_exec_reconfiguration (opcode, walk_state);
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break;
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case OPTYPE_FATAL:
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/* 3 Operands, 0 External_result, 0 Internal_result */
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status = acpi_aml_exec_fatal (walk_state);
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break;
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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) &&
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result_obj) {
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status = acpi_ds_result_push (result_obj, walk_state);
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}
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break;
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case OPTYPE_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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acpi_ds_result_stack_pop (walk_state);
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break;
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case OPTYPE_METHOD_CALL:
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/*
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* (AML_METHODCALL) Op->Value->Arg->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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node = next_op->node;
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/* Next_op points to first argument op */
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next_op = next_op->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
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* control method, we must resolve all local
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* references here (Local variables, arguments
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* 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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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 (status);
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break;
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case OPTYPE_CREATE_FIELD:
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status = acpi_ds_load2_end_op (walk_state, op);
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if (ACPI_FAILURE (status)) {
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break;
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}
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status = acpi_ds_eval_field_unit_operands (walk_state, op);
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break;
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case OPTYPE_NAMED_OBJECT:
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status = acpi_ds_load2_end_op (walk_state, op);
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if (ACPI_FAILURE (status)) {
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break;
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}
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switch (op->opcode) {
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case AML_REGION_OP:
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status = acpi_ds_eval_region_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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status = acpi_ds_result_stack_pop (walk_state);
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break;
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case AML_METHOD_OP:
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break;
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case AML_ALIAS_OP:
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/* Alias creation was already handled by call
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to psxload above */
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break;
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default:
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/* Nothing needs to be done */
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status = AE_OK;
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break;
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}
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break;
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default:
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status = AE_NOT_IMPLEMENTED;
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break;
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}
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/*
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* ACPI 2.0 support for 64-bit integers:
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* Truncate numeric result value if we are executing from a 32-bit ACPI table
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*/
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|
acpi_aml_truncate_for32bit_table (result_obj, walk_state);
|
|
|
|
/*
|
|
* Check if we just completed the evaluation of a
|
|
* conditional predicate
|
|
*/
|
|
|
|
if ((walk_state->control_state) &&
|
|
(walk_state->control_state->common.state ==
|
|
CONTROL_PREDICATE_EXECUTING) &&
|
|
(walk_state->control_state->control.predicate_op == op)) {
|
|
status = acpi_ds_get_predicate_value (walk_state, op, (u32) result_obj);
|
|
result_obj = NULL;
|
|
}
|
|
|
|
|
|
cleanup:
|
|
if (result_obj) {
|
|
/* Break to debugger to display result */
|
|
|
|
DEBUGGER_EXEC (acpi_db_display_result_object (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, result_obj, walk_state);
|
|
}
|
|
|
|
/* Always clear the object stack */
|
|
|
|
/* TBD: [Investigate] Clear stack of return value,
|
|
but don't delete it */
|
|
walk_state->num_operands = 0;
|
|
|
|
return (status);
|
|
}
|
|
|
|
|