mirror of
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1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
1267 lines
34 KiB
C
1267 lines
34 KiB
C
/******************************************************************************
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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 - 2005, 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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return_VOID;
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}
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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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goto cleanup;
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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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goto cleanup;
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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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goto cleanup;
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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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goto cleanup;
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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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}
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/* Search the parent list */
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else while (prev) {
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/* Traverse all siblings in the parent's argument list */
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next = prev->common.next;
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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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}
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else {
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prev->common.next = op->common.next;
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next = NULL;
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}
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}
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prev = next;
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}
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}
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cleanup:
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/* Now we can actually delete the subtree rooted at op */
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acpi_ps_delete_parse_tree (op);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ps_next_parse_state
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*
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* PARAMETERS: parser_state - Current parser state object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Update the parser state based upon the return exception from
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* the parser callback.
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*
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******************************************************************************/
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acpi_status
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acpi_ps_next_parse_state (
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struct acpi_walk_state *walk_state,
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union acpi_parse_object *op,
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acpi_status callback_status)
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{
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struct acpi_parse_state *parser_state = &walk_state->parser_state;
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acpi_status status = AE_CTRL_PENDING;
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ACPI_FUNCTION_TRACE_PTR ("ps_next_parse_state", op);
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switch (callback_status) {
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case AE_CTRL_TERMINATE:
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/*
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* A control method was terminated via a RETURN statement.
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* The walk of this method is complete.
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*/
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parser_state->aml = parser_state->aml_end;
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status = AE_CTRL_TERMINATE;
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break;
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case AE_CTRL_BREAK:
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parser_state->aml = walk_state->aml_last_while;
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walk_state->control_state->common.value = FALSE;
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status = AE_CTRL_BREAK;
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break;
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case AE_CTRL_CONTINUE:
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parser_state->aml = walk_state->aml_last_while;
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status = AE_CTRL_CONTINUE;
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break;
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case AE_CTRL_PENDING:
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parser_state->aml = walk_state->aml_last_while;
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break;
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#if 0
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case AE_CTRL_SKIP:
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parser_state->aml = parser_state->scope->parse_scope.pkg_end;
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status = AE_OK;
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break;
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#endif
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case AE_CTRL_TRUE:
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/*
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* Predicate of an IF was true, and we are at the matching ELSE.
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* Just close out this package
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*/
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parser_state->aml = acpi_ps_get_next_package_end (parser_state);
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break;
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case AE_CTRL_FALSE:
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/*
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* Either an IF/WHILE Predicate was false or we encountered a BREAK
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* opcode. In both cases, we do not execute the rest of the
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* package; We simply close out the parent (finishing the walk of
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* this branch of the tree) and continue execution at the parent
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* level.
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*/
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parser_state->aml = parser_state->scope->parse_scope.pkg_end;
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/* In the case of a BREAK, just force a predicate (if any) to FALSE */
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walk_state->control_state->common.value = FALSE;
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status = AE_CTRL_END;
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break;
|
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|
|
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case AE_CTRL_TRANSFER:
|
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|
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/*
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* A method call (invocation) -- transfer control
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*/
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status = AE_CTRL_TRANSFER;
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walk_state->prev_op = op;
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walk_state->method_call_op = op;
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walk_state->method_call_node = (op->common.value.arg)->common.node;
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|
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/* Will return value (if any) be used by the caller? */
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walk_state->return_used = acpi_ds_is_result_used (op, walk_state);
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break;
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|
|
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default:
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status = callback_status;
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if ((callback_status & AE_CODE_MASK) == AE_CODE_CONTROL) {
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status = AE_OK;
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}
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break;
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}
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return_ACPI_STATUS (status);
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}
|
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|
|
|
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/*******************************************************************************
|
|
*
|
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* FUNCTION: acpi_ps_parse_loop
|
|
*
|
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* PARAMETERS: parser_state - Current parser state object
|
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*
|
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* RETURN: Status
|
|
*
|
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* DESCRIPTION: Parse AML (pointed to by the current parser state) and return
|
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* a tree of ops.
|
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*
|
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******************************************************************************/
|
|
|
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acpi_status
|
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acpi_ps_parse_loop (
|
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struct acpi_walk_state *walk_state)
|
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{
|
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acpi_status status = AE_OK;
|
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union acpi_parse_object *op = NULL; /* current op */
|
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union acpi_parse_object *arg = NULL;
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union acpi_parse_object *pre_op = NULL;
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struct acpi_parse_state *parser_state;
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u8 *aml_op_start = NULL;
|
|
|
|
|
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ACPI_FUNCTION_TRACE_PTR ("ps_parse_loop", walk_state);
|
|
|
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if (walk_state->descending_callback == NULL) {
|
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return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
parser_state = &walk_state->parser_state;
|
|
walk_state->arg_types = 0;
|
|
|
|
#if (!defined (ACPI_NO_METHOD_EXECUTION) && !defined (ACPI_CONSTANT_EVAL_ONLY))
|
|
if (walk_state->walk_type & ACPI_WALK_METHOD_RESTART) {
|
|
/* We are restarting a preempted control method */
|
|
|
|
if (acpi_ps_has_completed_scope (parser_state)) {
|
|
/*
|
|
* We must check if a predicate to an IF or WHILE statement
|
|
* was just completed
|
|
*/
|
|
if ((parser_state->scope->parse_scope.op) &&
|
|
((parser_state->scope->parse_scope.op->common.aml_opcode == AML_IF_OP) ||
|
|
(parser_state->scope->parse_scope.op->common.aml_opcode == AML_WHILE_OP)) &&
|
|
(walk_state->control_state) &&
|
|
(walk_state->control_state->common.state ==
|
|
ACPI_CONTROL_PREDICATE_EXECUTING)) {
|
|
/*
|
|
* A predicate was just completed, get the value of the
|
|
* predicate and branch based on that value
|
|
*/
|
|
walk_state->op = NULL;
|
|
status = acpi_ds_get_predicate_value (walk_state, ACPI_TO_POINTER (TRUE));
|
|
if (ACPI_FAILURE (status) &&
|
|
((status & AE_CODE_MASK) != AE_CODE_CONTROL)) {
|
|
if (status == AE_AML_NO_RETURN_VALUE) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Invoked method did not return a value, %s\n",
|
|
acpi_format_exception (status)));
|
|
|
|
}
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "get_predicate Failed, %s\n",
|
|
acpi_format_exception (status)));
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
}
|
|
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
|
|
}
|
|
else if (walk_state->prev_op) {
|
|
/* We were in the middle of an op */
|
|
|
|
op = walk_state->prev_op;
|
|
walk_state->arg_types = walk_state->prev_arg_types;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Iterative parsing loop, while there is more aml to process:
|
|
*/
|
|
while ((parser_state->aml < parser_state->aml_end) || (op)) {
|
|
aml_op_start = parser_state->aml;
|
|
if (!op) {
|
|
/* Get the next opcode from the AML stream */
|
|
|
|
walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
|
|
parser_state->aml_start);
|
|
walk_state->opcode = acpi_ps_peek_opcode (parser_state);
|
|
|
|
/*
|
|
* First cut to determine what we have found:
|
|
* 1) A valid AML opcode
|
|
* 2) A name string
|
|
* 3) An unknown/invalid opcode
|
|
*/
|
|
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
|
|
switch (walk_state->op_info->class) {
|
|
case AML_CLASS_ASCII:
|
|
case AML_CLASS_PREFIX:
|
|
/*
|
|
* Starts with a valid prefix or ASCII char, this is a name
|
|
* string. Convert the bare name string to a namepath.
|
|
*/
|
|
walk_state->opcode = AML_INT_NAMEPATH_OP;
|
|
walk_state->arg_types = ARGP_NAMESTRING;
|
|
break;
|
|
|
|
case AML_CLASS_UNKNOWN:
|
|
|
|
/* The opcode is unrecognized. Just skip unknown opcodes */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Found unknown opcode %X at AML address %p offset %X, ignoring\n",
|
|
walk_state->opcode, parser_state->aml, walk_state->aml_offset));
|
|
|
|
ACPI_DUMP_BUFFER (parser_state->aml, 128);
|
|
|
|
/* Assume one-byte bad opcode */
|
|
|
|
parser_state->aml++;
|
|
continue;
|
|
|
|
default:
|
|
|
|
/* Found opcode info, this is a normal opcode */
|
|
|
|
parser_state->aml += acpi_ps_get_opcode_size (walk_state->opcode);
|
|
walk_state->arg_types = walk_state->op_info->parse_args;
|
|
break;
|
|
}
|
|
|
|
/* Create Op structure and append to parent's argument list */
|
|
|
|
if (walk_state->op_info->flags & AML_NAMED) {
|
|
/* Allocate a new pre_op if necessary */
|
|
|
|
if (!pre_op) {
|
|
pre_op = acpi_ps_alloc_op (walk_state->opcode);
|
|
if (!pre_op) {
|
|
status = AE_NO_MEMORY;
|
|
goto close_this_op;
|
|
}
|
|
}
|
|
|
|
pre_op->common.value.arg = NULL;
|
|
pre_op->common.aml_opcode = walk_state->opcode;
|
|
|
|
/*
|
|
* Get and append arguments until we find the node that contains
|
|
* the name (the type ARGP_NAME).
|
|
*/
|
|
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
|
|
(GET_CURRENT_ARG_TYPE (walk_state->arg_types) != ARGP_NAME)) {
|
|
status = acpi_ps_get_next_arg (walk_state, parser_state,
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
|
|
acpi_ps_append_arg (pre_op, arg);
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
|
}
|
|
|
|
/* Make sure that we found a NAME and didn't run out of arguments */
|
|
|
|
if (!GET_CURRENT_ARG_TYPE (walk_state->arg_types)) {
|
|
status = AE_AML_NO_OPERAND;
|
|
goto close_this_op;
|
|
}
|
|
|
|
/* We know that this arg is a name, move to next arg */
|
|
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
|
|
|
/*
|
|
* Find the object. This will either insert the object into
|
|
* the namespace or simply look it up
|
|
*/
|
|
walk_state->op = NULL;
|
|
|
|
status = walk_state->descending_callback (walk_state, &op);
|
|
if (ACPI_FAILURE (status)) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "During name lookup/catalog, %s\n",
|
|
acpi_format_exception (status)));
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (op == NULL) {
|
|
continue;
|
|
}
|
|
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
if (status == AE_CTRL_PENDING) {
|
|
status = AE_OK;
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
|
|
acpi_ps_append_arg (op, pre_op->common.value.arg);
|
|
acpi_gbl_depth++;
|
|
|
|
if (op->common.aml_opcode == AML_REGION_OP) {
|
|
/*
|
|
* Defer final parsing of an operation_region body,
|
|
* because we don't have enough info in the first pass
|
|
* to parse it correctly (i.e., there may be method
|
|
* calls within the term_arg elements of the body.)
|
|
*
|
|
* However, we must continue parsing because
|
|
* the opregion is not a standalone package --
|
|
* we don't know where the end is at this point.
|
|
*
|
|
* (Length is unknown until parse of the body complete)
|
|
*/
|
|
op->named.data = aml_op_start;
|
|
op->named.length = 0;
|
|
}
|
|
}
|
|
else {
|
|
/* Not a named opcode, just allocate Op and append to parent */
|
|
|
|
walk_state->op_info = acpi_ps_get_opcode_info (walk_state->opcode);
|
|
op = acpi_ps_alloc_op (walk_state->opcode);
|
|
if (!op) {
|
|
status = AE_NO_MEMORY;
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (walk_state->op_info->flags & AML_CREATE) {
|
|
/*
|
|
* Backup to beginning of create_xXXfield declaration
|
|
* body_length is unknown until we parse the body
|
|
*/
|
|
op->named.data = aml_op_start;
|
|
op->named.length = 0;
|
|
}
|
|
|
|
acpi_ps_append_arg (acpi_ps_get_parent_scope (parser_state), op);
|
|
|
|
if ((walk_state->descending_callback != NULL)) {
|
|
/*
|
|
* Find the object. This will either insert the object into
|
|
* the namespace or simply look it up
|
|
*/
|
|
walk_state->op = op;
|
|
|
|
status = walk_state->descending_callback (walk_state, &op);
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
if (status == AE_CTRL_PENDING) {
|
|
status = AE_OK;
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
}
|
|
}
|
|
|
|
op->common.aml_offset = walk_state->aml_offset;
|
|
|
|
if (walk_state->op_info) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"Opcode %4.4X [%s] Op %p Aml %p aml_offset %5.5X\n",
|
|
(u32) op->common.aml_opcode, walk_state->op_info->name,
|
|
op, parser_state->aml, op->common.aml_offset));
|
|
}
|
|
}
|
|
|
|
|
|
/* Start arg_count at zero because we don't know if there are any args yet */
|
|
|
|
walk_state->arg_count = 0;
|
|
|
|
if (walk_state->arg_types) /* Are there any arguments that must be processed? */ {
|
|
/* Get arguments */
|
|
|
|
switch (op->common.aml_opcode) {
|
|
case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
|
|
case AML_WORD_OP: /* AML_WORDDATA_ARG */
|
|
case AML_DWORD_OP: /* AML_DWORDATA_ARG */
|
|
case AML_QWORD_OP: /* AML_QWORDATA_ARG */
|
|
case AML_STRING_OP: /* AML_ASCIICHARLIST_ARG */
|
|
|
|
/* Fill in constant or string argument directly */
|
|
|
|
acpi_ps_get_next_simple_arg (parser_state,
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), op);
|
|
break;
|
|
|
|
case AML_INT_NAMEPATH_OP: /* AML_NAMESTRING_ARG */
|
|
|
|
status = acpi_ps_get_next_namepath (walk_state, parser_state, op, 1);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
|
|
walk_state->arg_types = 0;
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Op is not a constant or string, append each argument to the Op */
|
|
|
|
while (GET_CURRENT_ARG_TYPE (walk_state->arg_types) &&
|
|
!walk_state->arg_count) {
|
|
walk_state->aml_offset = (u32) ACPI_PTR_DIFF (parser_state->aml,
|
|
parser_state->aml_start);
|
|
status = acpi_ps_get_next_arg (walk_state, parser_state,
|
|
GET_CURRENT_ARG_TYPE (walk_state->arg_types), &arg);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (arg) {
|
|
arg->common.aml_offset = walk_state->aml_offset;
|
|
acpi_ps_append_arg (op, arg);
|
|
}
|
|
INCREMENT_ARG_LIST (walk_state->arg_types);
|
|
}
|
|
|
|
/* Special processing for certain opcodes */
|
|
|
|
switch (op->common.aml_opcode) {
|
|
case AML_METHOD_OP:
|
|
|
|
/*
|
|
* Skip parsing of control method
|
|
* because we don't have enough info in the first pass
|
|
* to parse it correctly.
|
|
*
|
|
* Save the length and address of the body
|
|
*/
|
|
op->named.data = parser_state->aml;
|
|
op->named.length = (u32) (parser_state->pkg_end - parser_state->aml);
|
|
|
|
/* Skip body of method */
|
|
|
|
parser_state->aml = parser_state->pkg_end;
|
|
walk_state->arg_count = 0;
|
|
break;
|
|
|
|
case AML_BUFFER_OP:
|
|
case AML_PACKAGE_OP:
|
|
case AML_VAR_PACKAGE_OP:
|
|
|
|
if ((op->common.parent) &&
|
|
(op->common.parent->common.aml_opcode == AML_NAME_OP) &&
|
|
(walk_state->descending_callback != acpi_ds_exec_begin_op)) {
|
|
/*
|
|
* Skip parsing of Buffers and Packages
|
|
* because we don't have enough info in the first pass
|
|
* to parse them correctly.
|
|
*/
|
|
op->named.data = aml_op_start;
|
|
op->named.length = (u32) (parser_state->pkg_end - aml_op_start);
|
|
|
|
/* Skip body */
|
|
|
|
parser_state->aml = parser_state->pkg_end;
|
|
walk_state->arg_count = 0;
|
|
}
|
|
break;
|
|
|
|
case AML_WHILE_OP:
|
|
|
|
if (walk_state->control_state) {
|
|
walk_state->control_state->control.package_end = parser_state->pkg_end;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/* No action for all other opcodes */
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Check for arguments that need to be processed */
|
|
|
|
if (walk_state->arg_count) {
|
|
/* There are arguments (complex ones), push Op and prepare for argument */
|
|
|
|
status = acpi_ps_push_scope (parser_state, op,
|
|
walk_state->arg_types, walk_state->arg_count);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto close_this_op;
|
|
}
|
|
op = NULL;
|
|
continue;
|
|
}
|
|
|
|
/* All arguments have been processed -- Op is complete, prepare for next */
|
|
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
|
if (walk_state->op_info->flags & AML_NAMED) {
|
|
if (acpi_gbl_depth) {
|
|
acpi_gbl_depth--;
|
|
}
|
|
|
|
if (op->common.aml_opcode == AML_REGION_OP) {
|
|
/*
|
|
* Skip parsing of control method or opregion body,
|
|
* because we don't have enough info in the first pass
|
|
* to parse them correctly.
|
|
*
|
|
* Completed parsing an op_region declaration, we now
|
|
* know the length.
|
|
*/
|
|
op->named.length = (u32) (parser_state->aml - op->named.data);
|
|
}
|
|
}
|
|
|
|
if (walk_state->op_info->flags & AML_CREATE) {
|
|
/*
|
|
* Backup to beginning of create_xXXfield declaration (1 for
|
|
* Opcode)
|
|
*
|
|
* body_length is unknown until we parse the body
|
|
*/
|
|
op->named.length = (u32) (parser_state->aml - op->named.data);
|
|
}
|
|
|
|
/* This op complete, notify the dispatcher */
|
|
|
|
if (walk_state->ascending_callback != NULL) {
|
|
walk_state->op = op;
|
|
walk_state->opcode = op->common.aml_opcode;
|
|
|
|
status = walk_state->ascending_callback (walk_state);
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
if (status == AE_CTRL_PENDING) {
|
|
status = AE_OK;
|
|
goto close_this_op;
|
|
}
|
|
}
|
|
|
|
|
|
close_this_op:
|
|
/*
|
|
* Finished one argument of the containing scope
|
|
*/
|
|
parser_state->scope->parse_scope.arg_count--;
|
|
|
|
/* Close this Op (will result in parse subtree deletion) */
|
|
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
op = NULL;
|
|
if (pre_op) {
|
|
acpi_ps_free_op (pre_op);
|
|
pre_op = NULL;
|
|
}
|
|
|
|
switch (status) {
|
|
case AE_OK:
|
|
break;
|
|
|
|
|
|
case AE_CTRL_TRANSFER:
|
|
|
|
/*
|
|
* We are about to transfer to a called method.
|
|
*/
|
|
walk_state->prev_op = op;
|
|
walk_state->prev_arg_types = walk_state->arg_types;
|
|
return_ACPI_STATUS (status);
|
|
|
|
|
|
case AE_CTRL_END:
|
|
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
|
|
if (op) {
|
|
walk_state->op = op;
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
|
walk_state->opcode = op->common.aml_opcode;
|
|
|
|
status = walk_state->ascending_callback (walk_state);
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
op = NULL;
|
|
}
|
|
status = AE_OK;
|
|
break;
|
|
|
|
|
|
case AE_CTRL_BREAK:
|
|
case AE_CTRL_CONTINUE:
|
|
|
|
/* Pop off scopes until we find the While */
|
|
|
|
while (!op || (op->common.aml_opcode != AML_WHILE_OP)) {
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
}
|
|
|
|
/* Close this iteration of the While loop */
|
|
|
|
walk_state->op = op;
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
|
walk_state->opcode = op->common.aml_opcode;
|
|
|
|
status = walk_state->ascending_callback (walk_state);
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
op = NULL;
|
|
|
|
status = AE_OK;
|
|
break;
|
|
|
|
|
|
case AE_CTRL_TERMINATE:
|
|
|
|
status = AE_OK;
|
|
|
|
/* Clean up */
|
|
do {
|
|
if (op) {
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
}
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
|
|
} while (op);
|
|
|
|
return_ACPI_STATUS (status);
|
|
|
|
|
|
default: /* All other non-AE_OK status */
|
|
|
|
do {
|
|
if (op) {
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
}
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
|
|
} while (op);
|
|
|
|
|
|
/*
|
|
* TBD: Cleanup parse ops on error
|
|
*/
|
|
#if 0
|
|
if (op == NULL) {
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
}
|
|
#endif
|
|
walk_state->prev_op = op;
|
|
walk_state->prev_arg_types = walk_state->arg_types;
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/* This scope complete? */
|
|
|
|
if (acpi_ps_has_completed_scope (parser_state)) {
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Popped scope, Op=%p\n", op));
|
|
}
|
|
else {
|
|
op = NULL;
|
|
}
|
|
|
|
} /* while parser_state->Aml */
|
|
|
|
|
|
/*
|
|
* Complete the last Op (if not completed), and clear the scope stack.
|
|
* It is easily possible to end an AML "package" with an unbounded number
|
|
* of open scopes (such as when several ASL blocks are closed with
|
|
* sequential closing braces). We want to terminate each one cleanly.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "AML package complete at Op %p\n", op));
|
|
do {
|
|
if (op) {
|
|
if (walk_state->ascending_callback != NULL) {
|
|
walk_state->op = op;
|
|
walk_state->op_info = acpi_ps_get_opcode_info (op->common.aml_opcode);
|
|
walk_state->opcode = op->common.aml_opcode;
|
|
|
|
status = walk_state->ascending_callback (walk_state);
|
|
status = acpi_ps_next_parse_state (walk_state, op, status);
|
|
if (status == AE_CTRL_PENDING) {
|
|
status = AE_OK;
|
|
goto close_this_op;
|
|
}
|
|
|
|
if (status == AE_CTRL_TERMINATE) {
|
|
status = AE_OK;
|
|
|
|
/* Clean up */
|
|
do {
|
|
if (op) {
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
}
|
|
|
|
acpi_ps_pop_scope (parser_state, &op,
|
|
&walk_state->arg_types, &walk_state->arg_count);
|
|
|
|
} while (op);
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
else if (ACPI_FAILURE (status)) {
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
|
|
acpi_ps_complete_this_op (walk_state, op);
|
|
}
|
|
|
|
acpi_ps_pop_scope (parser_state, &op, &walk_state->arg_types,
|
|
&walk_state->arg_count);
|
|
|
|
} while (op);
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ps_parse_aml
|
|
*
|
|
* PARAMETERS: start_scope - The starting point of the parse. Becomes the
|
|
* root of the parsed op tree.
|
|
* Aml - Pointer to the raw AML code to parse
|
|
* aml_size - Length of the AML to parse
|
|
*
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Parse raw AML and return a tree of ops
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ps_parse_aml (
|
|
struct acpi_walk_state *walk_state)
|
|
{
|
|
acpi_status status;
|
|
acpi_status terminate_status;
|
|
struct acpi_thread_state *thread;
|
|
struct acpi_thread_state *prev_walk_list = acpi_gbl_current_walk_list;
|
|
struct acpi_walk_state *previous_walk_state;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ps_parse_aml");
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Entered with walk_state=%p Aml=%p size=%X\n",
|
|
walk_state, walk_state->parser_state.aml, walk_state->parser_state.aml_size));
|
|
|
|
|
|
/* Create and initialize a new thread state */
|
|
|
|
thread = acpi_ut_create_thread_state ();
|
|
if (!thread) {
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
walk_state->thread = thread;
|
|
acpi_ds_push_walk_state (walk_state, thread);
|
|
|
|
/*
|
|
* This global allows the AML debugger to get a handle to the currently
|
|
* executing control method.
|
|
*/
|
|
acpi_gbl_current_walk_list = thread;
|
|
|
|
/*
|
|
* Execute the walk loop as long as there is a valid Walk State. This
|
|
* handles nested control method invocations without recursion.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "State=%p\n", walk_state));
|
|
|
|
status = AE_OK;
|
|
while (walk_state) {
|
|
if (ACPI_SUCCESS (status)) {
|
|
/*
|
|
* The parse_loop executes AML until the method terminates
|
|
* or calls another method.
|
|
*/
|
|
status = acpi_ps_parse_loop (walk_state);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"Completed one call to walk loop, %s State=%p\n",
|
|
acpi_format_exception (status), walk_state));
|
|
|
|
if (status == AE_CTRL_TRANSFER) {
|
|
/*
|
|
* A method call was detected.
|
|
* Transfer control to the called control method
|
|
*/
|
|
status = acpi_ds_call_control_method (thread, walk_state, NULL);
|
|
|
|
/*
|
|
* If the transfer to the new method method call worked, a new walk
|
|
* state was created -- get it
|
|
*/
|
|
walk_state = acpi_ds_get_current_walk_state (thread);
|
|
continue;
|
|
}
|
|
else if (status == AE_CTRL_TERMINATE) {
|
|
status = AE_OK;
|
|
}
|
|
else if ((status != AE_OK) && (walk_state->method_desc)) {
|
|
ACPI_REPORT_METHOD_ERROR ("Method execution failed",
|
|
walk_state->method_node, NULL, status);
|
|
|
|
/* Check for possible multi-thread reentrancy problem */
|
|
|
|
if ((status == AE_ALREADY_EXISTS) &&
|
|
(!walk_state->method_desc->method.semaphore)) {
|
|
/*
|
|
* This method is marked not_serialized, but it tried to create a named
|
|
* object, causing the second thread entrance to fail. We will workaround
|
|
* this by marking the method permanently as Serialized.
|
|
*/
|
|
walk_state->method_desc->method.method_flags |= AML_METHOD_SERIALIZED;
|
|
walk_state->method_desc->method.concurrency = 1;
|
|
}
|
|
}
|
|
|
|
if (walk_state->method_desc) {
|
|
/* Decrement the thread count on the method parse tree */
|
|
|
|
if (walk_state->method_desc->method.thread_count) {
|
|
walk_state->method_desc->method.thread_count--;
|
|
}
|
|
}
|
|
|
|
/* We are done with this walk, move on to the parent if any */
|
|
|
|
walk_state = acpi_ds_pop_walk_state (thread);
|
|
|
|
/* Reset the current scope to the beginning of scope stack */
|
|
|
|
acpi_ds_scope_stack_clear (walk_state);
|
|
|
|
/*
|
|
* If we just returned from the execution of a control method,
|
|
* there's lots of cleanup to do
|
|
*/
|
|
if ((walk_state->parse_flags & ACPI_PARSE_MODE_MASK) == ACPI_PARSE_EXECUTE) {
|
|
terminate_status = acpi_ds_terminate_control_method (walk_state);
|
|
if (ACPI_FAILURE (terminate_status)) {
|
|
ACPI_REPORT_ERROR ((
|
|
"Could not terminate control method properly\n"));
|
|
|
|
/* Ignore error and continue */
|
|
}
|
|
}
|
|
|
|
/* Delete this walk state and all linked control states */
|
|
|
|
acpi_ps_cleanup_scope (&walk_state->parser_state);
|
|
|
|
previous_walk_state = walk_state;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "return_value=%p, implicit_value=%p State=%p\n",
|
|
walk_state->return_desc, walk_state->implicit_return_obj, walk_state));
|
|
|
|
/* Check if we have restarted a preempted walk */
|
|
|
|
walk_state = acpi_ds_get_current_walk_state (thread);
|
|
if (walk_state) {
|
|
if (ACPI_SUCCESS (status)) {
|
|
/*
|
|
* There is another walk state, restart it.
|
|
* If the method return value is not used by the parent,
|
|
* The object is deleted
|
|
*/
|
|
if (!previous_walk_state->return_desc) {
|
|
status = acpi_ds_restart_control_method (walk_state,
|
|
previous_walk_state->implicit_return_obj);
|
|
}
|
|
else {
|
|
/*
|
|
* We have a valid return value, delete any implicit
|
|
* return value.
|
|
*/
|
|
acpi_ds_clear_implicit_return (previous_walk_state);
|
|
|
|
status = acpi_ds_restart_control_method (walk_state,
|
|
previous_walk_state->return_desc);
|
|
}
|
|
if (ACPI_SUCCESS (status)) {
|
|
walk_state->walk_type |= ACPI_WALK_METHOD_RESTART;
|
|
}
|
|
}
|
|
else {
|
|
/* On error, delete any return object */
|
|
|
|
acpi_ut_remove_reference (previous_walk_state->return_desc);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Just completed a 1st-level method, save the final internal return
|
|
* value (if any)
|
|
*/
|
|
else if (previous_walk_state->caller_return_desc) {
|
|
if (previous_walk_state->implicit_return_obj) {
|
|
*(previous_walk_state->caller_return_desc) = previous_walk_state->implicit_return_obj;
|
|
}
|
|
else {
|
|
/* NULL if no return value */
|
|
|
|
*(previous_walk_state->caller_return_desc) = previous_walk_state->return_desc;
|
|
}
|
|
}
|
|
else {
|
|
if (previous_walk_state->return_desc) {
|
|
/* Caller doesn't want it, must delete it */
|
|
|
|
acpi_ut_remove_reference (previous_walk_state->return_desc);
|
|
}
|
|
if (previous_walk_state->implicit_return_obj) {
|
|
/* Caller doesn't want it, must delete it */
|
|
|
|
acpi_ut_remove_reference (previous_walk_state->implicit_return_obj);
|
|
}
|
|
}
|
|
|
|
acpi_ds_delete_walk_state (previous_walk_state);
|
|
}
|
|
|
|
/* Normal exit */
|
|
|
|
acpi_ex_release_all_mutexes (thread);
|
|
acpi_ut_delete_generic_state (ACPI_CAST_PTR (union acpi_generic_state, thread));
|
|
acpi_gbl_current_walk_list = prev_walk_list;
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|