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243 lines
7.0 KiB
243 lines
7.0 KiB
/******************************************************************************
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*
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* Module Name: psxface - Parser external interfaces
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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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#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/acinterp.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_PARSER
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ACPI_MODULE_NAME ("psxface")
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/*******************************************************************************
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*
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* FUNCTION: acpi_psx_execute
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*
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* PARAMETERS: Info->Node - A method object containing both the AML
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* address and length.
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* **Params - List of parameters to pass to method,
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* terminated by NULL. Params itself may be
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* NULL if no parameters are being passed.
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* **return_obj_desc - Return object from execution of the
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* method.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute a control method
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*
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******************************************************************************/
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acpi_status
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acpi_psx_execute (
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struct acpi_parameter_info *info)
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{
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acpi_status status;
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union acpi_operand_object *obj_desc;
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u32 i;
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union acpi_parse_object *op;
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struct acpi_walk_state *walk_state;
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ACPI_FUNCTION_TRACE ("psx_execute");
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/* Validate the Node and get the attached object */
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if (!info || !info->node) {
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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obj_desc = acpi_ns_get_attached_object (info->node);
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if (!obj_desc) {
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Init for new method, wait on concurrency semaphore */
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status = acpi_ds_begin_method_execution (info->node, obj_desc, NULL);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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if ((info->parameter_type == ACPI_PARAM_ARGS) &&
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(info->parameters)) {
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/*
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* The caller "owns" the parameters, so give each one an extra
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* reference
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*/
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for (i = 0; info->parameters[i]; i++) {
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acpi_ut_add_reference (info->parameters[i]);
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}
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}
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/*
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* 1) Perform the first pass parse of the method to enter any
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* named objects that it creates into the namespace
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
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"**** Begin Method Parse **** Entry=%p obj=%p\n",
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info->node, obj_desc));
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/* Create and init a Root Node */
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op = acpi_ps_create_scope_op ();
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if (!op) {
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status = AE_NO_MEMORY;
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goto cleanup1;
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}
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/*
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* Get a new owner_id for objects created by this method. Namespace
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* objects (such as Operation Regions) can be created during the
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* first pass parse.
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*/
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obj_desc->method.owning_id = acpi_ut_allocate_owner_id (ACPI_OWNER_TYPE_METHOD);
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/* Create and initialize a new walk state */
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walk_state = acpi_ds_create_walk_state (obj_desc->method.owning_id,
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NULL, NULL, NULL);
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if (!walk_state) {
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status = AE_NO_MEMORY;
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goto cleanup2;
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}
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status = acpi_ds_init_aml_walk (walk_state, op, info->node,
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obj_desc->method.aml_start,
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obj_desc->method.aml_length, NULL, 1);
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if (ACPI_FAILURE (status)) {
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goto cleanup3;
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}
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/* Parse the AML */
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status = acpi_ps_parse_aml (walk_state);
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acpi_ps_delete_parse_tree (op);
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if (ACPI_FAILURE (status)) {
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goto cleanup1; /* Walk state is already deleted */
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}
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/*
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* 2) Execute the method. Performs second pass parse simultaneously
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
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"**** Begin Method Execution **** Entry=%p obj=%p\n",
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info->node, obj_desc));
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/* Create and init a Root Node */
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op = acpi_ps_create_scope_op ();
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if (!op) {
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status = AE_NO_MEMORY;
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goto cleanup1;
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}
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/* Init new op with the method name and pointer back to the NS node */
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acpi_ps_set_name (op, info->node->name.integer);
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op->common.node = info->node;
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/* Create and initialize a new walk state */
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walk_state = acpi_ds_create_walk_state (0, NULL, NULL, NULL);
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if (!walk_state) {
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status = AE_NO_MEMORY;
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goto cleanup2;
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}
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status = acpi_ds_init_aml_walk (walk_state, op, info->node,
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obj_desc->method.aml_start,
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obj_desc->method.aml_length, info, 3);
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if (ACPI_FAILURE (status)) {
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goto cleanup3;
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}
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/*
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* The walk of the parse tree is where we actually execute the method
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*/
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status = acpi_ps_parse_aml (walk_state);
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goto cleanup2; /* Walk state already deleted */
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cleanup3:
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acpi_ds_delete_walk_state (walk_state);
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cleanup2:
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acpi_ps_delete_parse_tree (op);
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cleanup1:
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if ((info->parameter_type == ACPI_PARAM_ARGS) &&
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(info->parameters)) {
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/* Take away the extra reference that we gave the parameters above */
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for (i = 0; info->parameters[i]; i++) {
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/* Ignore errors, just do them all */
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(void) acpi_ut_update_object_reference (info->parameters[i], REF_DECREMENT);
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}
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}
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/*
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* If the method has returned an object, signal this to the caller with
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* a control exception code
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*/
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if (info->return_object) {
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ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned obj_desc=%p\n",
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info->return_object));
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ACPI_DUMP_STACK_ENTRY (info->return_object);
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status = AE_CTRL_RETURN_VALUE;
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}
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return_ACPI_STATUS (status);
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}
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