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1275 |
phoenix |
/******************************************************************************
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*
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* Module Name: psparse - Parser top level AML parse routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2004, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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/*
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* Parse the AML and build an operation tree as most interpreters,
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* like Perl, do. Parsing is done by hand rather than with a YACC
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* generated parser to tightly constrain stack and dynamic memory
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* usage. At the same time, parsing is kept flexible and the code
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* fairly compact by parsing based on a list of AML opcode
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* templates in aml_op_info[]
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*/
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#include <acpi/acpi.h>
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#include <acpi/acparser.h>
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#include <acpi/acdispat.h>
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#include <acpi/amlcode.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acinterp.h>
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psparse")
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static u32 acpi_gbl_depth = 0;
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_get_opcode_size
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*
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* PARAMETERS: Opcode - An AML opcode
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*
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* RETURN: Size of the opcode, in bytes (1 or 2)
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*
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* DESCRIPTION: Get the size of the current opcode.
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*
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******************************************************************************/
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u32
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acpi_ps_get_opcode_size (
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u32 opcode)
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{
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/* Extended (2-byte) opcode if > 255 */
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if (opcode > 0x00FF) {
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return (2);
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}
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/* Otherwise, just a single byte opcode */
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return (1);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_peek_opcode
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*
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* PARAMETERS: parser_state - A parser state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get next AML opcode (without incrementing AML pointer)
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*
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******************************************************************************/
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u16
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acpi_ps_peek_opcode (
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struct acpi_parse_state *parser_state)
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{
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u8 *aml;
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u16 opcode;
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aml = parser_state->aml;
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opcode = (u16) ACPI_GET8 (aml);
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if (opcode == AML_EXTOP) {
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/* Extended opcode */
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aml++;
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opcode = (u16) ((opcode << 8) | ACPI_GET8 (aml));
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}
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return (opcode);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_complete_this_op
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*
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* PARAMETERS: walk_state - Current State
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* Op - Op to complete
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*
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* RETURN: None.
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*
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* DESCRIPTION: Perform any cleanup at the completion of an Op.
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*
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******************************************************************************/
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void
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acpi_ps_complete_this_op (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op)
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{
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union acpi_parse_object *prev;
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union acpi_parse_object *next;
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const struct acpi_opcode_info *parent_info;
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union acpi_parse_object *replacement_op = NULL;
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ACPI_FUNCTION_TRACE_PTR ("ps_complete_this_op", op);
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/* Check for null Op, can happen if AML code is corrupt */
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if (!op) {
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return_VOID;
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}
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/* Delete this op and the subtree below it if asked to */
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if (((walk_state->parse_flags & ACPI_PARSE_TREE_MASK) == ACPI_PARSE_DELETE_TREE) &&
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(walk_state->op_info->class != AML_CLASS_ARGUMENT)) {
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/* Make sure that we only delete this subtree */
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if (op->common.parent) {
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/*
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* Check if we need to replace the operator and its subtree
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* with a return value op (placeholder op)
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*/
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parent_info = acpi_ps_get_opcode_info (op->common.parent->common.aml_opcode);
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switch (parent_info->class) {
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case AML_CLASS_CONTROL:
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break;
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case AML_CLASS_CREATE:
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/*
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* These opcodes contain term_arg operands. The current
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* op must be replaced by a placeholder return op
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*/
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replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
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if (!replacement_op) {
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return_VOID;
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}
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break;
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case AML_CLASS_NAMED_OBJECT:
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/*
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* These opcodes contain term_arg operands. The current
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* op must be replaced by a placeholder return op
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*/
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if ((op->common.parent->common.aml_opcode == AML_REGION_OP) ||
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(op->common.parent->common.aml_opcode == AML_DATA_REGION_OP) ||
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(op->common.parent->common.aml_opcode == AML_BUFFER_OP) ||
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(op->common.parent->common.aml_opcode == AML_PACKAGE_OP) ||
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(op->common.parent->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
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replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
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if (!replacement_op) {
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return_VOID;
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}
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}
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if ((op->common.parent->common.aml_opcode == AML_NAME_OP) &&
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(walk_state->descending_callback != acpi_ds_exec_begin_op)) {
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if ((op->common.aml_opcode == AML_BUFFER_OP) ||
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(op->common.aml_opcode == AML_PACKAGE_OP) ||
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(op->common.aml_opcode == AML_VAR_PACKAGE_OP)) {
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replacement_op = acpi_ps_alloc_op (op->common.aml_opcode);
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if (!replacement_op) {
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return_VOID;
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}
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replacement_op->named.data = op->named.data;
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replacement_op->named.length = op->named.length;
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}
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}
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break;
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default:
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replacement_op = acpi_ps_alloc_op (AML_INT_RETURN_VALUE_OP);
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if (!replacement_op) {
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return_VOID;
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}
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}
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/* We must unlink this op from the parent tree */
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prev = op->common.parent->common.value.arg;
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if (prev == op) {
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/* This op is the first in the list */
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if (replacement_op) {
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replacement_op->common.parent = op->common.parent;
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replacement_op->common.value.arg = NULL;
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replacement_op->common.node = op->common.node;
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op->common.parent->common.value.arg = replacement_op;
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replacement_op->common.next = op->common.next;
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}
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else {
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op->common.parent->common.value.arg = op->common.next;
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}
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| 250 |
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}
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| 251 |
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| 252 |
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/* Search the parent list */
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| 253 |
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| 254 |
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else while (prev) {
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/* Traverse all siblings in the parent's argument list */
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| 256 |
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| 257 |
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next = prev->common.next;
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| 258 |
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if (next == op) {
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if (replacement_op) {
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replacement_op->common.parent = op->common.parent;
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replacement_op->common.value.arg = NULL;
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replacement_op->common.node = op->common.node;
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prev->common.next = replacement_op;
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replacement_op->common.next = op->common.next;
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next = NULL;
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| 266 |
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}
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| 267 |
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else {
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| 268 |
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prev->common.next = op->common.next;
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| 269 |
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next = NULL;
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| 270 |
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}
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| 271 |
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}
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| 272 |
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| 273 |
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prev = next;
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| 274 |
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}
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| 275 |
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}
|
| 276 |
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| 277 |
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/* Now we can actually delete the subtree rooted at op */
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| 278 |
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|
| 279 |
|
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acpi_ps_delete_parse_tree (op);
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| 280 |
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|
| 281 |
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return_VOID;
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| 282 |
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}
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| 283 |
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| 284 |
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return_VOID;
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| 285 |
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}
|
| 286 |
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|
| 287 |
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| 288 |
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/*******************************************************************************
|
| 289 |
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*
|
| 290 |
|
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* FUNCTION: acpi_ps_next_parse_state
|
| 291 |
|
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*
|
| 292 |
|
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* PARAMETERS: parser_state - Current parser state object
|
| 293 |
|
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*
|
| 294 |
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* RETURN: Status
|
| 295 |
|
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*
|
| 296 |
|
|
* DESCRIPTION: Update the parser state based upon the return exception from
|
| 297 |
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* the parser callback.
|
| 298 |
|
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*
|
| 299 |
|
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******************************************************************************/
|
| 300 |
|
|
|
| 301 |
|
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acpi_status
|
| 302 |
|
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acpi_ps_next_parse_state (
|
| 303 |
|
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struct acpi_walk_state *walk_state,
|
| 304 |
|
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union acpi_parse_object *op,
|
| 305 |
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acpi_status callback_status)
|
| 306 |
|
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{
|
| 307 |
|
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struct acpi_parse_state *parser_state = &walk_state->parser_state;
|
| 308 |
|
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acpi_status status = AE_CTRL_PENDING;
|
| 309 |
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|
| 310 |
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|
| 311 |
|
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ACPI_FUNCTION_TRACE_PTR ("ps_next_parse_state", op);
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| 312 |
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|
| 313 |
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|
| 314 |
|
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switch (callback_status) {
|
| 315 |
|
|
case AE_CTRL_TERMINATE:
|
| 316 |
|
|
|
| 317 |
|
|
/*
|
| 318 |
|
|
* A control method was terminated via a RETURN statement.
|
| 319 |
|
|
* The walk of this method is complete.
|
| 320 |
|
|
*/
|
| 321 |
|
|
parser_state->aml = parser_state->aml_end;
|
| 322 |
|
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status = AE_CTRL_TERMINATE;
|
| 323 |
|
|
break;
|
| 324 |
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|
| 325 |
|
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|
| 326 |
|
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case AE_CTRL_BREAK:
|
| 327 |
|
|
|
| 328 |
|
|
parser_state->aml = walk_state->aml_last_while;
|
| 329 |
|
|
walk_state->control_state->common.value = FALSE;
|
| 330 |
|
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status = AE_CTRL_BREAK;
|
| 331 |
|
|
break;
|
| 332 |
|
|
|
| 333 |
|
|
case AE_CTRL_CONTINUE:
|
| 334 |
|
|
|
| 335 |
|
|
|
| 336 |
|
|
parser_state->aml = walk_state->aml_last_while;
|
| 337 |
|
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status = AE_CTRL_CONTINUE;
|
| 338 |
|
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break;
|
| 339 |
|
|
|
| 340 |
|
|
case AE_CTRL_PENDING:
|
| 341 |
|
|
|
| 342 |
|
|
parser_state->aml = walk_state->aml_last_while;
|
| 343 |
|
|
break;
|
| 344 |
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|
| 345 |
|
|
#if 0
|
| 346 |
|
|
case AE_CTRL_SKIP:
|
| 347 |
|
|
|
| 348 |
|
|
parser_state->aml = parser_state->scope->parse_scope.pkg_end;
|
| 349 |
|
|
status = AE_OK;
|
| 350 |
|
|
break;
|
| 351 |
|
|
#endif
|
| 352 |
|
|
|
| 353 |
|
|
case AE_CTRL_TRUE:
|
| 354 |
|
|
|
| 355 |
|
|
/*
|
| 356 |
|
|
* Predicate of an IF was true, and we are at the matching ELSE.
|
| 357 |
|
|
* Just close out this package
|
| 358 |
|
|
*/
|
| 359 |
|
|
parser_state->aml = acpi_ps_get_next_package_end (parser_state);
|
| 360 |
|
|
break;
|
| 361 |
|
|
|
| 362 |
|
|
|
| 363 |
|
|
case AE_CTRL_FALSE:
|
| 364 |
|
|
|
| 365 |
|
|
/*
|
| 366 |
|
|
* Either an IF/WHILE Predicate was false or we encountered a BREAK
|
| 367 |
|
|
* opcode. In both cases, we do not execute the rest of the
|
| 368 |
|
|
* package; We simply close out the parent (finishing the walk of
|
| 369 |
|
|
* this branch of the tree) and continue execution at the parent
|
| 370 |
|
|
* level.
|
| 371 |
|
|
*/
|
| 372 |
|
|
parser_state->aml = parser_state->scope->parse_scope.pkg_end;
|
| 373 |
|
|
|
| 374 |
|
|
/* In the case of a BREAK, just force a predicate (if any) to FALSE */
|
| 375 |
|
|
|
| 376 |
|
|
walk_state->control_state->common.value = FALSE;
|
| 377 |
|
|
status = AE_CTRL_END;
|
| 378 |
|
|
break;
|
| 379 |
|
|
|
| 380 |
|
|
|
| 381 |
|
|
case AE_CTRL_TRANSFER:
|
| 382 |
|
|
|
| 383 |
|
|
/*
|
| 384 |
|
|
* A method call (invocation) -- transfer control
|
| 385 |
|
|
*/
|
| 386 |
|
|
status = AE_CTRL_TRANSFER;
|
| 387 |
|
|
walk_state->prev_op = op;
|
| 388 |
|
|
walk_state->method_call_op = op;
|
| 389 |
|
|
walk_state->method_call_node = (op->common.value.arg)->common.node;
|
| 390 |
|
|
|
| 391 |
|
|
/* Will return value (if any) be used by the caller? */
|
| 392 |
|
|
|
| 393 |
|
|
walk_state->return_used = acpi_ds_is_result_used (op, walk_state);
|
| 394 |
|
|
break;
|
| 395 |
|
|
|
| 396 |
|
|
|
| 397 |
|
|
default:
|
| 398 |
|
|
status = callback_status;
|
| 399 |
|
|
if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) {
|
| 400 |
|
|
status = AE_OK;
|
| 401 |
|
|
}
|
| 402 |
|
|
break;
|
| 403 |
|
|
}
|
| 404 |
|
|
|
| 405 |
|
|
return_ACPI_STATUS (status);
|
| 406 |
|
|
}
|
| 407 |
|
|
|
| 408 |
|
|
|
| 409 |
|
|
/*******************************************************************************
|
| 410 |
|
|
*
|
| 411 |
|
|
* FUNCTION: acpi_ps_parse_loop
|
| 412 |
|
|
*
|
| 413 |
|
|
* PARAMETERS: parser_state - Current parser state object
|
| 414 |
|
|
*
|
| 415 |
|
|
* RETURN: Status
|
| 416 |
|
|
*
|
| 417 |
|
|
* DESCRIPTION: Parse AML (pointed to by the current parser state) and return
|
| 418 |
|
|
* a tree of ops.
|
| 419 |
|
|
*
|
| 420 |
|
|
******************************************************************************/
|
| 421 |
|
|
|
| 422 |
|
|
acpi_status
|
| 423 |
|
|
acpi_ps_parse_loop (
|
| 424 |
|
|
struct acpi_walk_state *walk_state)
|
| 425 |
|
|
{
|
| 426 |
|
|
acpi_status status = AE_OK;
|
| 427 |
|
|
union acpi_parse_object *op = NULL; /* current op */
|
| 428 |
|
|
union acpi_parse_object *arg = NULL;
|
| 429 |
|
|
union acpi_parse_object *pre_op = NULL;
|
| 430 |
|
|
struct acpi_parse_state *parser_state;
|
| 431 |
|
|
u8 *aml_op_start = NULL;
|
| 432 |
|
|
|
| 433 |
|
|
|
| 434 |
|
|
ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state);
|
| 435 |
|
|
|
| 436 |
|
|
if (walk_state->descending_callback == NULL) {
|
| 437 |
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
| 438 |
|
|
}
|
| 439 |
|
|
|
| 440 |
|
|
parser_state = &walk_state->parser_state;
|
| 441 |
|
|
walk_state->arg_types = 0;
|
| 442 |
|
|
|
| 443 |
|
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
|
| 444 |
|
|
if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) {
|
| 445 |
|
|
/* We are restarting a preempted control method */
|
| 446 |
|
|
|
| 447 |
|
|
if (acpi_ps_has_completed_scope (parser_state)) {
|
| 448 |
|
|
/*
|
| 449 |
|
|
* We must check if a predicate to an IF or WHILE statement
|
| 450 |
|
|
* was just completed
|
| 451 |
|
|
*/
|
| 452 |
|
|
if ((parser_state->scope->parse_scope.op) &&
|
| 453 |
|
|
((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) ||
|
| 454 |
|
|
(parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) &&
|
| 455 |
|
|
(walk_state->control_state) &&
|
| 456 |
|
|
(walk_state->control_state->common.state ==
|
| 457 |
|
|
ACPI_CONTROL_PREDICATE_EXECUTING)) {
|
| 458 |
|
|
/*
|
| 459 |
|
|
* A predicate was just completed, get the value of the
|
| 460 |
|
|
* predicate and branch based on that value
|
| 461 |
|
|
*/
|
| 462 |
|
|
walk_state->op = NULL;
|
| 463 |
|
|
status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE));
|
| 464 |
|
|
if (ACPI_FAILURE (status) &&
|
| 465 |
|
|
((status & AE_CODE_MASK) != AE_CODE_CONTROL)) {
|
| 466 |
|
|
if (status == AE_AML_NO_RETURN_VALUE) {
|
| 467 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
| 468 |
|
|
"Invoked method did not return a value, %s\n",
|
| 469 |
|
|
acpi_format_exception (status)));
|
| 470 |
|
|
|
| 471 |
|
|
}
|
| 472 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "get_predicate Failed, %s\n",
|
| 473 |
|
|
acpi_format_exception (status)));
|
| 474 |
|
|
return_ACPI_STATUS (status);
|
| 475 |
|
|
}
|
| 476 |
|
|
|
| 477 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 478 |
|
|
}
|
| 479 |
|
|
|
| 480 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 481 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 482 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
|
| 483 |
|
|
}
|
| 484 |
|
|
else if (walk_state->prev_op) {
|
| 485 |
|
|
/* We were in the middle of an op */
|
| 486 |
|
|
|
| 487 |
|
|
op = walk_state->prev_op;
|
| 488 |
|
|
walk_state->arg_types = walk_state->prev_arg_types;
|
| 489 |
|
|
}
|
| 490 |
|
|
}
|
| 491 |
|
|
#endif
|
| 492 |
|
|
|
| 493 |
|
|
/*
|
| 494 |
|
|
* Iterative parsing loop, while there is more aml to process:
|
| 495 |
|
|
*/
|
| 496 |
|
|
while ((parser_state->aml < parser_state->aml_end) || (op)) {
|
| 497 |
|
|
aml_op_start = parser_state->aml;
|
| 498 |
|
|
if (!op) {
|
| 499 |
|
|
/* Get the next opcode from the AML stream */
|
| 500 |
|
|
|
| 501 |
|
|
walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
|
| 502 |
|
|
parser_state->aml_start);
|
| 503 |
|
|
walk_state->opcode = acpi_ps_peek_opcode (parser_state);
|
| 504 |
|
|
|
| 505 |
|
|
/*
|
| 506 |
|
|
* First cut to determine what we have found:
|
| 507 |
|
|
* 1) A valid AML opcode
|
| 508 |
|
|
* 2) A name string
|
| 509 |
|
|
* 3) An unknown/invalid opcode
|
| 510 |
|
|
*/
|
| 511 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
|
| 512 |
|
|
switch (walk_state->op_info->class) {
|
| 513 |
|
|
case AML_CLASS_ASCII:
|
| 514 |
|
|
case AML_CLASS_PREFIX:
|
| 515 |
|
|
/*
|
| 516 |
|
|
* Starts with a valid prefix or ASCII char, this is a name
|
| 517 |
|
|
* string. Convert the bare name string to a namepath.
|
| 518 |
|
|
*/
|
| 519 |
|
|
walk_state->opcode = AML_INT_NAMEPATH_OP;
|
| 520 |
|
|
walk_state->arg_types = ARGP_NAMESTRING;
|
| 521 |
|
|
break;
|
| 522 |
|
|
|
| 523 |
|
|
case AML_CLASS_UNKNOWN:
|
| 524 |
|
|
|
| 525 |
|
|
/* The opcode is unrecognized. Just skip unknown opcodes */
|
| 526 |
|
|
|
| 527 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
| 528 |
|
|
"Found unknown opcode %X at AML address %p offset %X, ignoring\n",
|
| 529 |
|
|
walk_state->opcode, parser_state->aml, walk_state->aml_offset));
|
| 530 |
|
|
|
| 531 |
|
|
ACPI_DUMP_BUFFER (parser_state->aml, 128);
|
| 532 |
|
|
|
| 533 |
|
|
/* Assume one-byte bad opcode */
|
| 534 |
|
|
|
| 535 |
|
|
parser_state->aml++;
|
| 536 |
|
|
continue;
|
| 537 |
|
|
|
| 538 |
|
|
default:
|
| 539 |
|
|
|
| 540 |
|
|
/* Found opcode info, this is a normal opcode */
|
| 541 |
|
|
|
| 542 |
|
|
parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode);
|
| 543 |
|
|
walk_state->arg_types = walk_state->op_info->parse_args;
|
| 544 |
|
|
break;
|
| 545 |
|
|
}
|
| 546 |
|
|
|
| 547 |
|
|
/* Create Op structure and append to parent's argument list */
|
| 548 |
|
|
|
| 549 |
|
|
if (walk_state->op_info->flags & AML_NAMED) {
|
| 550 |
|
|
/* Allocate a new pre_op if necessary */
|
| 551 |
|
|
|
| 552 |
|
|
if (!pre_op) {
|
| 553 |
|
|
pre_op = acpi_ps_alloc_op (walk_state->opcode);
|
| 554 |
|
|
if (!pre_op) {
|
| 555 |
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
| 556 |
|
|
}
|
| 557 |
|
|
}
|
| 558 |
|
|
|
| 559 |
|
|
pre_op->common.value.arg = NULL;
|
| 560 |
|
|
pre_op->common.aml_opcode = walk_state->opcode;
|
| 561 |
|
|
|
| 562 |
|
|
/*
|
| 563 |
|
|
* Get and append arguments until we find the node that contains
|
| 564 |
|
|
* the name (the type ARGP_NAME).
|
| 565 |
|
|
*/
|
| 566 |
|
|
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
|
| 567 |
|
|
(GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) {
|
| 568 |
|
|
status = acpi_ps_get_next_arg (walk_state, parser_state,
|
| 569 |
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
|
| 570 |
|
|
if (ACPI_FAILURE (status)) {
|
| 571 |
|
|
goto close_this_op;
|
| 572 |
|
|
}
|
| 573 |
|
|
|
| 574 |
|
|
acpi_ps_append_arg (pre_op, arg);
|
| 575 |
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
| 576 |
|
|
}
|
| 577 |
|
|
|
| 578 |
|
|
/* Make sure that we found a NAME and didn't run out of arguments */
|
| 579 |
|
|
|
| 580 |
|
|
if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) {
|
| 581 |
|
|
return_ACPI_STATUS (AE_AML_NO_OPERAND);
|
| 582 |
|
|
}
|
| 583 |
|
|
|
| 584 |
|
|
/* We know that this arg is a name, move to next arg */
|
| 585 |
|
|
|
| 586 |
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
| 587 |
|
|
|
| 588 |
|
|
/*
|
| 589 |
|
|
* Find the object. This will either insert the object into
|
| 590 |
|
|
* the namespace or simply look it up
|
| 591 |
|
|
*/
|
| 592 |
|
|
walk_state->op = NULL;
|
| 593 |
|
|
|
| 594 |
|
|
status = walk_state->descending_callback (walk_state, &op);
|
| 595 |
|
|
if (ACPI_FAILURE (status)) {
|
| 596 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "During name lookup/catalog, %s\n",
|
| 597 |
|
|
acpi_format_exception (status)));
|
| 598 |
|
|
goto close_this_op;
|
| 599 |
|
|
}
|
| 600 |
|
|
|
| 601 |
|
|
if (op == NULL) {
|
| 602 |
|
|
continue;
|
| 603 |
|
|
}
|
| 604 |
|
|
|
| 605 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 606 |
|
|
if (status == AE_CTRL_PENDING) {
|
| 607 |
|
|
status = AE_OK;
|
| 608 |
|
|
goto close_this_op;
|
| 609 |
|
|
}
|
| 610 |
|
|
|
| 611 |
|
|
if (ACPI_FAILURE (status)) {
|
| 612 |
|
|
goto close_this_op;
|
| 613 |
|
|
}
|
| 614 |
|
|
|
| 615 |
|
|
acpi_ps_append_arg (op, pre_op->common.value.arg);
|
| 616 |
|
|
acpi_gbl_depth++;
|
| 617 |
|
|
|
| 618 |
|
|
if (op->common.aml_opcode == AML_REGION_OP) {
|
| 619 |
|
|
/*
|
| 620 |
|
|
* Defer final parsing of an operation_region body,
|
| 621 |
|
|
* because we don't have enough info in the first pass
|
| 622 |
|
|
* to parse it correctly (i.e., there may be method
|
| 623 |
|
|
* calls within the term_arg elements of the body.)
|
| 624 |
|
|
*
|
| 625 |
|
|
* However, we must continue parsing because
|
| 626 |
|
|
* the opregion is not a standalone package --
|
| 627 |
|
|
* we don't know where the end is at this point.
|
| 628 |
|
|
*
|
| 629 |
|
|
* (Length is unknown until parse of the body complete)
|
| 630 |
|
|
*/
|
| 631 |
|
|
op->named.data = aml_op_start;
|
| 632 |
|
|
op->named.length = 0;
|
| 633 |
|
|
}
|
| 634 |
|
|
}
|
| 635 |
|
|
else {
|
| 636 |
|
|
/* Not a named opcode, just allocate Op and append to parent */
|
| 637 |
|
|
|
| 638 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
|
| 639 |
|
|
op = acpi_ps_alloc_op (walk_state->opcode);
|
| 640 |
|
|
if (!op) {
|
| 641 |
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
| 642 |
|
|
}
|
| 643 |
|
|
|
| 644 |
|
|
if (walk_state->op_info->flags & AML_CREATE) {
|
| 645 |
|
|
/*
|
| 646 |
|
|
* Backup to beginning of create_xXXfield declaration
|
| 647 |
|
|
* body_length is unknown until we parse the body
|
| 648 |
|
|
*/
|
| 649 |
|
|
op->named.data = aml_op_start;
|
| 650 |
|
|
op->named.length = 0;
|
| 651 |
|
|
}
|
| 652 |
|
|
|
| 653 |
|
|
acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op);
|
| 654 |
|
|
|
| 655 |
|
|
if ((walk_state->descending_callback != NULL)) {
|
| 656 |
|
|
/*
|
| 657 |
|
|
* Find the object. This will either insert the object into
|
| 658 |
|
|
* the namespace or simply look it up
|
| 659 |
|
|
*/
|
| 660 |
|
|
walk_state->op = op;
|
| 661 |
|
|
|
| 662 |
|
|
status = walk_state->descending_callback (walk_state, &op);
|
| 663 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 664 |
|
|
if (status == AE_CTRL_PENDING) {
|
| 665 |
|
|
status = AE_OK;
|
| 666 |
|
|
goto close_this_op;
|
| 667 |
|
|
}
|
| 668 |
|
|
|
| 669 |
|
|
if (ACPI_FAILURE (status)) {
|
| 670 |
|
|
goto close_this_op;
|
| 671 |
|
|
}
|
| 672 |
|
|
}
|
| 673 |
|
|
}
|
| 674 |
|
|
|
| 675 |
|
|
op->common.aml_offset = walk_state->aml_offset;
|
| 676 |
|
|
|
| 677 |
|
|
if (walk_state->op_info) {
|
| 678 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
| 679 |
|
|
"Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n",
|
| 680 |
|
|
(u32) op->common.aml_opcode, walk_state->op_info->name,
|
| 681 |
|
|
op, parser_state->aml, op->common.aml_offset));
|
| 682 |
|
|
}
|
| 683 |
|
|
}
|
| 684 |
|
|
|
| 685 |
|
|
|
| 686 |
|
|
/* Start arg_count at zero because we don't know if there are any args yet */
|
| 687 |
|
|
|
| 688 |
|
|
walk_state->arg_count = 0;
|
| 689 |
|
|
|
| 690 |
|
|
if (walk_state->arg_types) /* Are there any arguments that must be processed? */ {
|
| 691 |
|
|
/* Get arguments */
|
| 692 |
|
|
|
| 693 |
|
|
switch (op->common.aml_opcode) {
|
| 694 |
|
|
case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
|
| 695 |
|
|
case AML_WORD_OP: /* AML_WORDDATA_ARG */
|
| 696 |
|
|
case AML_DWORD_OP: /* AML_DWORDATA_ARG */
|
| 697 |
|
|
case AML_QWORD_OP: /* AML_QWORDATA_ARG */
|
| 698 |
|
|
case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
|
| 699 |
|
|
|
| 700 |
|
|
/* Fill in constant or string argument directly */
|
| 701 |
|
|
|
| 702 |
|
|
acpi_ps_get_next_simple_arg (parser_state,
|
| 703 |
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), op);
|
| 704 |
|
|
break;
|
| 705 |
|
|
|
| 706 |
|
|
case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
|
| 707 |
|
|
|
| 708 |
|
|
status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1);
|
| 709 |
|
|
if (ACPI_FAILURE (status)) {
|
| 710 |
|
|
goto close_this_op;
|
| 711 |
|
|
}
|
| 712 |
|
|
|
| 713 |
|
|
walk_state->arg_types = 0;
|
| 714 |
|
|
break;
|
| 715 |
|
|
|
| 716 |
|
|
default:
|
| 717 |
|
|
|
| 718 |
|
|
/* Op is not a constant or string, append each argument to the Op */
|
| 719 |
|
|
|
| 720 |
|
|
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
|
| 721 |
|
|
!walk_state->arg_count) {
|
| 722 |
|
|
walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
|
| 723 |
|
|
parser_state->aml_start);
|
| 724 |
|
|
status = acpi_ps_get_next_arg (walk_state, parser_state,
|
| 725 |
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
|
| 726 |
|
|
if (ACPI_FAILURE (status)) {
|
| 727 |
|
|
goto close_this_op;
|
| 728 |
|
|
}
|
| 729 |
|
|
|
| 730 |
|
|
if (arg) {
|
| 731 |
|
|
arg->common.aml_offset = walk_state->aml_offset;
|
| 732 |
|
|
acpi_ps_append_arg (op, arg);
|
| 733 |
|
|
}
|
| 734 |
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
| 735 |
|
|
}
|
| 736 |
|
|
|
| 737 |
|
|
/* Special processing for certain opcodes */
|
| 738 |
|
|
|
| 739 |
|
|
switch (op->common.aml_opcode) {
|
| 740 |
|
|
case AML_METHOD_OP:
|
| 741 |
|
|
|
| 742 |
|
|
/*
|
| 743 |
|
|
* Skip parsing of control method
|
| 744 |
|
|
* because we don't have enough info in the first pass
|
| 745 |
|
|
* to parse it correctly.
|
| 746 |
|
|
*
|
| 747 |
|
|
* Save the length and address of the body
|
| 748 |
|
|
*/
|
| 749 |
|
|
op->named.data = parser_state->aml;
|
| 750 |
|
|
op->named.length = (u32) (parser_state->pkg_end - parser_state->aml);
|
| 751 |
|
|
|
| 752 |
|
|
/* Skip body of method */
|
| 753 |
|
|
|
| 754 |
|
|
parser_state->aml = parser_state->pkg_end;
|
| 755 |
|
|
walk_state->arg_count = 0;
|
| 756 |
|
|
break;
|
| 757 |
|
|
|
| 758 |
|
|
case AML_BUFFER_OP:
|
| 759 |
|
|
case AML_PACKAGE_OP:
|
| 760 |
|
|
case AML_VAR_PACKAGE_OP:
|
| 761 |
|
|
|
| 762 |
|
|
if ((op->common.parent) &&
|
| 763 |
|
|
(op->common.parent->common.aml_opcode == AML_NAME_OP) &&
|
| 764 |
|
|
(walk_state->descending_callback != acpi_ds_exec_begin_op)) {
|
| 765 |
|
|
/*
|
| 766 |
|
|
* Skip parsing of Buffers and Packages
|
| 767 |
|
|
* because we don't have enough info in the first pass
|
| 768 |
|
|
* to parse them correctly.
|
| 769 |
|
|
*/
|
| 770 |
|
|
op->named.data = aml_op_start;
|
| 771 |
|
|
op->named.length = (u32) (parser_state->pkg_end - aml_op_start);
|
| 772 |
|
|
|
| 773 |
|
|
/* Skip body */
|
| 774 |
|
|
|
| 775 |
|
|
parser_state->aml = parser_state->pkg_end;
|
| 776 |
|
|
walk_state->arg_count = 0;
|
| 777 |
|
|
}
|
| 778 |
|
|
break;
|
| 779 |
|
|
|
| 780 |
|
|
case AML_WHILE_OP:
|
| 781 |
|
|
|
| 782 |
|
|
if (walk_state->control_state) {
|
| 783 |
|
|
walk_state->control_state->control.package_end = parser_state->pkg_end;
|
| 784 |
|
|
}
|
| 785 |
|
|
break;
|
| 786 |
|
|
|
| 787 |
|
|
default:
|
| 788 |
|
|
|
| 789 |
|
|
/* No action for all other opcodes */
|
| 790 |
|
|
break;
|
| 791 |
|
|
}
|
| 792 |
|
|
break;
|
| 793 |
|
|
}
|
| 794 |
|
|
}
|
| 795 |
|
|
|
| 796 |
|
|
/* Check for arguments that need to be processed */
|
| 797 |
|
|
|
| 798 |
|
|
if (walk_state->arg_count) {
|
| 799 |
|
|
/* There are arguments (complex ones), push Op and prepare for argument */
|
| 800 |
|
|
|
| 801 |
|
|
status = acpi_ps_push_scope (parser_state, op,
|
| 802 |
|
|
walk_state->arg_types, walk_state->arg_count);
|
| 803 |
|
|
if (ACPI_FAILURE (status)) {
|
| 804 |
|
|
return_ACPI_STATUS (status);
|
| 805 |
|
|
}
|
| 806 |
|
|
op = NULL;
|
| 807 |
|
|
continue;
|
| 808 |
|
|
}
|
| 809 |
|
|
|
| 810 |
|
|
/* All arguments have been processed -- Op is complete, prepare for next */
|
| 811 |
|
|
|
| 812 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
| 813 |
|
|
if (walk_state->op_info->flags & AML_NAMED) {
|
| 814 |
|
|
if (acpi_gbl_depth) {
|
| 815 |
|
|
acpi_gbl_depth--;
|
| 816 |
|
|
}
|
| 817 |
|
|
|
| 818 |
|
|
if (op->common.aml_opcode == AML_REGION_OP) {
|
| 819 |
|
|
/*
|
| 820 |
|
|
* Skip parsing of control method or opregion body,
|
| 821 |
|
|
* because we don't have enough info in the first pass
|
| 822 |
|
|
* to parse them correctly.
|
| 823 |
|
|
*
|
| 824 |
|
|
* Completed parsing an op_region declaration, we now
|
| 825 |
|
|
* know the length.
|
| 826 |
|
|
*/
|
| 827 |
|
|
op->named.length = (u32) (parser_state->aml - op->named.data);
|
| 828 |
|
|
}
|
| 829 |
|
|
}
|
| 830 |
|
|
|
| 831 |
|
|
if (walk_state->op_info->flags & AML_CREATE) {
|
| 832 |
|
|
/*
|
| 833 |
|
|
* Backup to beginning of create_xXXfield declaration (1 for
|
| 834 |
|
|
* Opcode)
|
| 835 |
|
|
*
|
| 836 |
|
|
* body_length is unknown until we parse the body
|
| 837 |
|
|
*/
|
| 838 |
|
|
op->named.length = (u32) (parser_state->aml - op->named.data);
|
| 839 |
|
|
}
|
| 840 |
|
|
|
| 841 |
|
|
/* This op complete, notify the dispatcher */
|
| 842 |
|
|
|
| 843 |
|
|
if (walk_state->ascending_callback != NULL) {
|
| 844 |
|
|
walk_state->op = op;
|
| 845 |
|
|
walk_state->opcode = op->common.aml_opcode;
|
| 846 |
|
|
|
| 847 |
|
|
status = walk_state->ascending_callback (walk_state);
|
| 848 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 849 |
|
|
if (status == AE_CTRL_PENDING) {
|
| 850 |
|
|
status = AE_OK;
|
| 851 |
|
|
goto close_this_op;
|
| 852 |
|
|
}
|
| 853 |
|
|
}
|
| 854 |
|
|
|
| 855 |
|
|
|
| 856 |
|
|
close_this_op:
|
| 857 |
|
|
/*
|
| 858 |
|
|
* Finished one argument of the containing scope
|
| 859 |
|
|
*/
|
| 860 |
|
|
parser_state->scope->parse_scope.arg_count--;
|
| 861 |
|
|
|
| 862 |
|
|
/* Close this Op (will result in parse subtree deletion) */
|
| 863 |
|
|
|
| 864 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 865 |
|
|
op = NULL;
|
| 866 |
|
|
if (pre_op) {
|
| 867 |
|
|
acpi_ps_free_op (pre_op);
|
| 868 |
|
|
pre_op = NULL;
|
| 869 |
|
|
}
|
| 870 |
|
|
|
| 871 |
|
|
switch (status) {
|
| 872 |
|
|
case AE_OK:
|
| 873 |
|
|
break;
|
| 874 |
|
|
|
| 875 |
|
|
|
| 876 |
|
|
case AE_CTRL_TRANSFER:
|
| 877 |
|
|
|
| 878 |
|
|
/*
|
| 879 |
|
|
* We are about to transfer to a called method.
|
| 880 |
|
|
*/
|
| 881 |
|
|
walk_state->prev_op = op;
|
| 882 |
|
|
walk_state->prev_arg_types = walk_state->arg_types;
|
| 883 |
|
|
return_ACPI_STATUS (status);
|
| 884 |
|
|
|
| 885 |
|
|
|
| 886 |
|
|
case AE_CTRL_END:
|
| 887 |
|
|
|
| 888 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 889 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 890 |
|
|
|
| 891 |
|
|
if (op) {
|
| 892 |
|
|
walk_state->op = op;
|
| 893 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
| 894 |
|
|
walk_state->opcode = op->common.aml_opcode;
|
| 895 |
|
|
|
| 896 |
|
|
status = walk_state->ascending_callback (walk_state);
|
| 897 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 898 |
|
|
|
| 899 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 900 |
|
|
op = NULL;
|
| 901 |
|
|
}
|
| 902 |
|
|
status = AE_OK;
|
| 903 |
|
|
break;
|
| 904 |
|
|
|
| 905 |
|
|
|
| 906 |
|
|
case AE_CTRL_BREAK:
|
| 907 |
|
|
case AE_CTRL_CONTINUE:
|
| 908 |
|
|
|
| 909 |
|
|
/* Pop off scopes until we find the While */
|
| 910 |
|
|
|
| 911 |
|
|
while (!op || (op->common.aml_opcode != AML_WHILE_OP)) {
|
| 912 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 913 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 914 |
|
|
}
|
| 915 |
|
|
|
| 916 |
|
|
/* Close this iteration of the While loop */
|
| 917 |
|
|
|
| 918 |
|
|
walk_state->op = op;
|
| 919 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
| 920 |
|
|
walk_state->opcode = op->common.aml_opcode;
|
| 921 |
|
|
|
| 922 |
|
|
status = walk_state->ascending_callback (walk_state);
|
| 923 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 924 |
|
|
|
| 925 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 926 |
|
|
op = NULL;
|
| 927 |
|
|
|
| 928 |
|
|
status = AE_OK;
|
| 929 |
|
|
break;
|
| 930 |
|
|
|
| 931 |
|
|
|
| 932 |
|
|
case AE_CTRL_TERMINATE:
|
| 933 |
|
|
|
| 934 |
|
|
status = AE_OK;
|
| 935 |
|
|
|
| 936 |
|
|
/* Clean up */
|
| 937 |
|
|
do {
|
| 938 |
|
|
if (op) {
|
| 939 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 940 |
|
|
}
|
| 941 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 942 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 943 |
|
|
|
| 944 |
|
|
} while (op);
|
| 945 |
|
|
|
| 946 |
|
|
return_ACPI_STATUS (status);
|
| 947 |
|
|
|
| 948 |
|
|
|
| 949 |
|
|
default: /* All other non-AE_OK status */
|
| 950 |
|
|
|
| 951 |
|
|
do {
|
| 952 |
|
|
if (op) {
|
| 953 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 954 |
|
|
}
|
| 955 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 956 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 957 |
|
|
|
| 958 |
|
|
} while (op);
|
| 959 |
|
|
|
| 960 |
|
|
|
| 961 |
|
|
/*
|
| 962 |
|
|
* TBD: Cleanup parse ops on error
|
| 963 |
|
|
*/
|
| 964 |
|
|
#if 0
|
| 965 |
|
|
if (op == NULL) {
|
| 966 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 967 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 968 |
|
|
}
|
| 969 |
|
|
#endif
|
| 970 |
|
|
walk_state->prev_op = op;
|
| 971 |
|
|
walk_state->prev_arg_types = walk_state->arg_types;
|
| 972 |
|
|
return_ACPI_STATUS (status);
|
| 973 |
|
|
}
|
| 974 |
|
|
|
| 975 |
|
|
/* This scope complete? */
|
| 976 |
|
|
|
| 977 |
|
|
if (acpi_ps_has_completed_scope (parser_state)) {
|
| 978 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 979 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 980 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
|
| 981 |
|
|
}
|
| 982 |
|
|
else {
|
| 983 |
|
|
op = NULL;
|
| 984 |
|
|
}
|
| 985 |
|
|
|
| 986 |
|
|
} /* while parser_state->Aml */
|
| 987 |
|
|
|
| 988 |
|
|
|
| 989 |
|
|
/*
|
| 990 |
|
|
* Complete the last Op (if not completed), and clear the scope stack.
|
| 991 |
|
|
* It is easily possible to end an AML "package" with an unbounded number
|
| 992 |
|
|
* of open scopes (such as when several ASL blocks are closed with
|
| 993 |
|
|
* sequential closing braces). We want to terminate each one cleanly.
|
| 994 |
|
|
*/
|
| 995 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op));
|
| 996 |
|
|
do {
|
| 997 |
|
|
if (op) {
|
| 998 |
|
|
if (walk_state->ascending_callback != NULL) {
|
| 999 |
|
|
walk_state->op = op;
|
| 1000 |
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
| 1001 |
|
|
walk_state->opcode = op->common.aml_opcode;
|
| 1002 |
|
|
|
| 1003 |
|
|
status = walk_state->ascending_callback (walk_state);
|
| 1004 |
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
| 1005 |
|
|
if (status == AE_CTRL_PENDING) {
|
| 1006 |
|
|
status = AE_OK;
|
| 1007 |
|
|
goto close_this_op;
|
| 1008 |
|
|
}
|
| 1009 |
|
|
|
| 1010 |
|
|
if (status == AE_CTRL_TERMINATE) {
|
| 1011 |
|
|
status = AE_OK;
|
| 1012 |
|
|
|
| 1013 |
|
|
/* Clean up */
|
| 1014 |
|
|
do {
|
| 1015 |
|
|
if (op) {
|
| 1016 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 1017 |
|
|
}
|
| 1018 |
|
|
|
| 1019 |
|
|
acpi_ps_pop_scope (parser_state, &op,
|
| 1020 |
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
| 1021 |
|
|
|
| 1022 |
|
|
} while (op);
|
| 1023 |
|
|
|
| 1024 |
|
|
return_ACPI_STATUS (status);
|
| 1025 |
|
|
}
|
| 1026 |
|
|
|
| 1027 |
|
|
else if (ACPI_FAILURE (status)) {
|
| 1028 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 1029 |
|
|
return_ACPI_STATUS (status);
|
| 1030 |
|
|
}
|
| 1031 |
|
|
}
|
| 1032 |
|
|
|
| 1033 |
|
|
acpi_ps_complete_this_op (walk_state, op);
|
| 1034 |
|
|
}
|
| 1035 |
|
|
|
| 1036 |
|
|
acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types,
|
| 1037 |
|
|
&walk_state->arg_count);
|
| 1038 |
|
|
|
| 1039 |
|
|
} while (op);
|
| 1040 |
|
|
|
| 1041 |
|
|
return_ACPI_STATUS (status);
|
| 1042 |
|
|
}
|
| 1043 |
|
|
|
| 1044 |
|
|
|
| 1045 |
|
|
/*******************************************************************************
|
| 1046 |
|
|
*
|
| 1047 |
|
|
* FUNCTION: acpi_ps_parse_aml
|
| 1048 |
|
|
*
|
| 1049 |
|
|
* PARAMETERS: start_scope - The starting point of the parse. Becomes the
|
| 1050 |
|
|
* root of the parsed op tree.
|
| 1051 |
|
|
* Aml - Pointer to the raw AML code to parse
|
| 1052 |
|
|
* aml_size - Length of the AML to parse
|
| 1053 |
|
|
*
|
| 1054 |
|
|
*
|
| 1055 |
|
|
* RETURN: Status
|
| 1056 |
|
|
*
|
| 1057 |
|
|
* DESCRIPTION: Parse raw AML and return a tree of ops
|
| 1058 |
|
|
*
|
| 1059 |
|
|
******************************************************************************/
|
| 1060 |
|
|
|
| 1061 |
|
|
acpi_status
|
| 1062 |
|
|
acpi_ps_parse_aml (
|
| 1063 |
|
|
struct acpi_walk_state *walk_state)
|
| 1064 |
|
|
{
|
| 1065 |
|
|
acpi_status status;
|
| 1066 |
|
|
acpi_status terminate_status;
|
| 1067 |
|
|
struct acpi_thread_state *thread;
|
| 1068 |
|
|
struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list;
|
| 1069 |
|
|
struct acpi_walk_state *previous_walk_state;
|
| 1070 |
|
|
|
| 1071 |
|
|
|
| 1072 |
|
|
ACPI_FUNCTION_TRACE ("ps_parse_aml");
|
| 1073 |
|
|
|
| 1074 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Entered with walk_state=%p Aml=%p size=%X\n",
|
| 1075 |
|
|
walk_state, walk_state->parser_state.aml, walk_state->parser_state.aml_size));
|
| 1076 |
|
|
|
| 1077 |
|
|
|
| 1078 |
|
|
/* Create and initialize a new thread state */
|
| 1079 |
|
|
|
| 1080 |
|
|
thread = acpi_ut_create_thread_state ();
|
| 1081 |
|
|
if (!thread) {
|
| 1082 |
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
| 1083 |
|
|
}
|
| 1084 |
|
|
|
| 1085 |
|
|
walk_state->thread = thread;
|
| 1086 |
|
|
acpi_ds_push_walk_state (walk_state, thread);
|
| 1087 |
|
|
|
| 1088 |
|
|
/*
|
| 1089 |
|
|
* This global allows the AML debugger to get a handle to the currently
|
| 1090 |
|
|
* executing control method.
|
| 1091 |
|
|
*/
|
| 1092 |
|
|
acpi_gbl_current_walk_list = thread;
|
| 1093 |
|
|
|
| 1094 |
|
|
/*
|
| 1095 |
|
|
* Execute the walk loop as long as there is a valid Walk State. This
|
| 1096 |
|
|
* handles nested control method invocations without recursion.
|
| 1097 |
|
|
*/
|
| 1098 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", walk_state));
|
| 1099 |
|
|
|
| 1100 |
|
|
status = AE_OK;
|
| 1101 |
|
|
while (walk_state) {
|
| 1102 |
|
|
if (ACPI_SUCCESS (status)) {
|
| 1103 |
|
|
/*
|
| 1104 |
|
|
* The parse_loop executes AML until the method terminates
|
| 1105 |
|
|
* or calls another method.
|
| 1106 |
|
|
*/
|
| 1107 |
|
|
status = acpi_ps_parse_loop (walk_state);
|
| 1108 |
|
|
}
|
| 1109 |
|
|
|
| 1110 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
| 1111 |
|
|
"Completed one call to walk loop, %s State=%p\n",
|
| 1112 |
|
|
acpi_format_exception (status), walk_state));
|
| 1113 |
|
|
|
| 1114 |
|
|
if (status == AE_CTRL_TRANSFER) {
|
| 1115 |
|
|
/*
|
| 1116 |
|
|
* A method call was detected.
|
| 1117 |
|
|
* Transfer control to the called control method
|
| 1118 |
|
|
*/
|
| 1119 |
|
|
status = acpi_ds_call_control_method (thread, walk_state, NULL);
|
| 1120 |
|
|
|
| 1121 |
|
|
/*
|
| 1122 |
|
|
* If the transfer to the new method method call worked, a new walk
|
| 1123 |
|
|
* state was created -- get it
|
| 1124 |
|
|
*/
|
| 1125 |
|
|
walk_state = acpi_ds_get_current_walk_state (thread);
|
| 1126 |
|
|
continue;
|
| 1127 |
|
|
}
|
| 1128 |
|
|
else if (status == AE_CTRL_TERMINATE) {
|
| 1129 |
|
|
status = AE_OK;
|
| 1130 |
|
|
}
|
| 1131 |
|
|
else if (status != AE_OK) {
|
| 1132 |
|
|
ACPI_REPORT_METHOD_ERROR ("Method execution failed",
|
| 1133 |
|
|
walk_state->method_node, NULL, status);
|
| 1134 |
|
|
|
| 1135 |
|
|
/* Check for possible multi-thread reentrancy problem */
|
| 1136 |
|
|
|
| 1137 |
|
|
if ((status == AE_ALREADY_EXISTS) &&
|
| 1138 |
|
|
(!walk_state->method_desc->method.semaphore)) {
|
| 1139 |
|
|
/*
|
| 1140 |
|
|
* This method is marked not_serialized, but it tried to create a named
|
| 1141 |
|
|
* object, causing the second thread entrance to fail. We will workaround
|
| 1142 |
|
|
* this by marking the method permanently as Serialized.
|
| 1143 |
|
|
*/
|
| 1144 |
|
|
walk_state->method_desc->method.method_flags |= AML_METHOD_SERIALIZED;
|
| 1145 |
|
|
walk_state->method_desc->method.concurrency = 1;
|
| 1146 |
|
|
}
|
| 1147 |
|
|
}
|
| 1148 |
|
|
|
| 1149 |
|
|
if (walk_state->method_desc) {
|
| 1150 |
|
|
/* Decrement the thread count on the method parse tree */
|
| 1151 |
|
|
|
| 1152 |
|
|
if (walk_state->method_desc->method.thread_count) {
|
| 1153 |
|
|
walk_state->method_desc->method.thread_count--;
|
| 1154 |
|
|
}
|
| 1155 |
|
|
}
|
| 1156 |
|
|
|
| 1157 |
|
|
/* We are done with this walk, move on to the parent if any */
|
| 1158 |
|
|
|
| 1159 |
|
|
walk_state = acpi_ds_pop_walk_state (thread);
|
| 1160 |
|
|
|
| 1161 |
|
|
/* Reset the current scope to the beginning of scope stack */
|
| 1162 |
|
|
|
| 1163 |
|
|
acpi_ds_scope_stack_clear (walk_state);
|
| 1164 |
|
|
|
| 1165 |
|
|
/*
|
| 1166 |
|
|
* If we just returned from the execution of a control method,
|
| 1167 |
|
|
* there's lots of cleanup to do
|
| 1168 |
|
|
*/
|
| 1169 |
|
|
if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) {
|
| 1170 |
|
|
terminate_status = acpi_ds_terminate_control_method (walk_state);
|
| 1171 |
|
|
if (ACPI_FAILURE (terminate_status)) {
|
| 1172 |
|
|
ACPI_REPORT_ERROR ((
|
| 1173 |
|
|
"Could not terminate control method properly\n"));
|
| 1174 |
|
|
|
| 1175 |
|
|
/* Ignore error and continue */
|
| 1176 |
|
|
}
|
| 1177 |
|
|
}
|
| 1178 |
|
|
|
| 1179 |
|
|
/* Delete this walk state and all linked control states */
|
| 1180 |
|
|
|
| 1181 |
|
|
acpi_ps_cleanup_scope (&walk_state->parser_state);
|
| 1182 |
|
|
|
| 1183 |
|
|
previous_walk_state = walk_state;
|
| 1184 |
|
|
|
| 1185 |
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "return_value=%p, State=%p\n",
|
| 1186 |
|
|
walk_state->return_desc, walk_state));
|
| 1187 |
|
|
|
| 1188 |
|
|
/* Check if we have restarted a preempted walk */
|
| 1189 |
|
|
|
| 1190 |
|
|
walk_state = acpi_ds_get_current_walk_state (thread);
|
| 1191 |
|
|
if (walk_state) {
|
| 1192 |
|
|
if (ACPI_SUCCESS (status)) {
|
| 1193 |
|
|
/*
|
| 1194 |
|
|
* There is another walk state, restart it.
|
| 1195 |
|
|
* If the method return value is not used by the parent,
|
| 1196 |
|
|
* The object is deleted
|
| 1197 |
|
|
*/
|
| 1198 |
|
|
status = acpi_ds_restart_control_method (walk_state,
|
| 1199 |
|
|
previous_walk_state->return_desc);
|
| 1200 |
|
|
if (ACPI_SUCCESS (status)) {
|
| 1201 |
|
|
walk_state->walk_type |= ACPI_WALK_METHOD_RESTART;
|
| 1202 |
|
|
}
|
| 1203 |
|
|
}
|
| 1204 |
|
|
else {
|
| 1205 |
|
|
/* On error, delete any return object */
|
| 1206 |
|
|
|
| 1207 |
|
|
acpi_ut_remove_reference (previous_walk_state->return_desc);
|
| 1208 |
|
|
}
|
| 1209 |
|
|
}
|
| 1210 |
|
|
|
| 1211 |
|
|
/*
|
| 1212 |
|
|
* Just completed a 1st-level method, save the final internal return
|
| 1213 |
|
|
* value (if any)
|
| 1214 |
|
|
*/
|
| 1215 |
|
|
else if (previous_walk_state->caller_return_desc) {
|
| 1216 |
|
|
*(previous_walk_state->caller_return_desc) = previous_walk_state->return_desc; /* NULL if no return value */
|
| 1217 |
|
|
}
|
| 1218 |
|
|
else if (previous_walk_state->return_desc) {
|
| 1219 |
|
|
/* Caller doesn't want it, must delete it */
|
| 1220 |
|
|
|
| 1221 |
|
|
acpi_ut_remove_reference (previous_walk_state->return_desc);
|
| 1222 |
|
|
}
|
| 1223 |
|
|
|
| 1224 |
|
|
acpi_ds_delete_walk_state (previous_walk_state);
|
| 1225 |
|
|
}
|
| 1226 |
|
|
|
| 1227 |
|
|
/* Normal exit */
|
| 1228 |
|
|
|
| 1229 |
|
|
acpi_ex_release_all_mutexes (thread);
|
| 1230 |
|
|
acpi_ut_delete_generic_state (ACPI_CAST_PTR (union acpi_generic_state, thread));
|
| 1231 |
|
|
acpi_gbl_current_walk_list = prev_walk_list;
|
| 1232 |
|
|
return_ACPI_STATUS (status);
|
| 1233 |
|
|
}
|
| 1234 |
|
|
|
| 1235 |
|
|
|
