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158 lines
4.2 KiB
C
158 lines
4.2 KiB
C
/******************************************************************************
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*
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* Module Name: psxface - Parser external interfaces
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000, 2001 R. Byron Moore
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <acpi.h>
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#define _COMPONENT ACPI_PARSER
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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: Method_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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ACPI_NAMESPACE_NODE *method_node,
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ACPI_OPERAND_OBJECT **params,
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ACPI_OPERAND_OBJECT **return_obj_desc)
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{
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ACPI_STATUS status;
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ACPI_OPERAND_OBJECT *obj_desc;
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u32 i;
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ACPI_PARSE_OBJECT *op;
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/* Validate the Node and get the attached object */
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if (!method_node) {
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return (AE_NULL_ENTRY);
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}
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obj_desc = acpi_ns_get_attached_object (method_node);
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if (!obj_desc) {
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return (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 (method_node, obj_desc, NULL);
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if (ACPI_FAILURE (status)) {
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return (status);
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}
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if (params) {
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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; params[i]; i++) {
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acpi_cm_add_reference (params[i]);
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}
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}
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/*
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* 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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/* Create and init a Root Node */
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op = acpi_ps_alloc_op (AML_SCOPE_OP);
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if (!op) {
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return (AE_NO_MEMORY);
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}
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status = acpi_ps_parse_aml (op, obj_desc->method.pcode,
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obj_desc->method.pcode_length,
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ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE,
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method_node, params, return_obj_desc,
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acpi_ds_load1_begin_op, acpi_ds_load1_end_op);
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acpi_ps_delete_parse_tree (op);
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/* Create and init a Root Node */
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op = acpi_ps_alloc_op (AML_SCOPE_OP);
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if (!op) {
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return (AE_NO_MEMORY);
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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, method_node->name);
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op->node = method_node;
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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 (op, obj_desc->method.pcode,
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obj_desc->method.pcode_length,
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ACPI_PARSE_EXECUTE | ACPI_PARSE_DELETE_TREE,
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method_node, params, return_obj_desc,
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acpi_ds_exec_begin_op, acpi_ds_exec_end_op);
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acpi_ps_delete_parse_tree (op);
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if (params) {
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/* Take away the extra reference that we gave the parameters above */
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for (i = 0; params[i]; i++) {
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acpi_cm_update_object_reference (params[i], REF_DECREMENT);
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}
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}
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/*
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* Normal exit is with Status == AE_RETURN_VALUE when a Return_op has been
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* executed, or with Status == AE_PENDING at end of AML block (end of
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* Method code)
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*/
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if (*return_obj_desc) {
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status = AE_CTRL_RETURN_VALUE;
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}
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return (status);
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}
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