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/******************************************************************************
*
* Module Name: psxface - Parser external interfaces
* $Revision: 40 $
*
*****************************************************************************/
/*
* Copyright (C) 2000, 2001 R. Byron Moore
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "acpi.h"
#include "acparser.h"
#include "acdispat.h"
#include "acinterp.h"
#include "amlcode.h"
#include "acnamesp.h"
#define _COMPONENT PARSER
MODULE_NAME ("psxface")
/*****************************************************************************
*
* FUNCTION: Acpi_psx_execute
*
* PARAMETERS: Method_node - A method object containing both the AML
* address and length.
* **Params - List of parameters to pass to method,
* terminated by NULL. Params itself may be
* NULL if no parameters are being passed.
* **Return_obj_desc - Return object from execution of the
* method.
*
* RETURN: Status
*
* DESCRIPTION: Execute a control method
*
****************************************************************************/
ACPI_STATUS
acpi_psx_execute (
ACPI_NAMESPACE_NODE *method_node,
ACPI_OPERAND_OBJECT **params,
ACPI_OPERAND_OBJECT **return_obj_desc)
{
ACPI_STATUS status;
ACPI_OPERAND_OBJECT *obj_desc;
u32 i;
ACPI_PARSE_OBJECT *op;
/* Validate the Node and get the attached object */
if (!method_node) {
return (AE_NULL_ENTRY);
}
obj_desc = acpi_ns_get_attached_object (method_node);
if (!obj_desc) {
return (AE_NULL_OBJECT);
}
/* Init for new method, wait on concurrency semaphore */
status = acpi_ds_begin_method_execution (method_node, obj_desc);
if (ACPI_FAILURE (status)) {
return (status);
}
if (params) {
/*
* The caller "owns" the parameters, so give each one an extra
* reference
*/
for (i = 0; params[i]; i++) {
acpi_cm_add_reference (params[i]);
}
}
/*
* Perform the first pass parse of the method to enter any
* named objects that it creates into the namespace
*/
/* Create and init a Root Node */
op = acpi_ps_alloc_op (AML_SCOPE_OP);
if (!op) {
return (AE_NO_MEMORY);
}
status = acpi_ps_parse_aml (op, obj_desc->method.pcode,
obj_desc->method.pcode_length,
ACPI_PARSE_LOAD_PASS1 | ACPI_PARSE_DELETE_TREE,
method_node, params, return_obj_desc,
acpi_ds_load1_begin_op, acpi_ds_load1_end_op);
acpi_ps_delete_parse_tree (op);
/* Create and init a Root Node */
op = acpi_ps_alloc_op (AML_SCOPE_OP);
if (!op) {
return (AE_NO_MEMORY);
}
/* Init new op with the method name and pointer back to the NS node */
acpi_ps_set_name (op, method_node->name);
op->node = method_node;
/*
* The walk of the parse tree is where we actually execute the method
*/
status = acpi_ps_parse_aml (op, obj_desc->method.pcode,
obj_desc->method.pcode_length,
ACPI_PARSE_EXECUTE | ACPI_PARSE_DELETE_TREE,
method_node, params, return_obj_desc,
acpi_ds_exec_begin_op, acpi_ds_exec_end_op);
acpi_ps_delete_parse_tree (op);
if (params) {
/* Take away the extra reference that we gave the parameters above */
for (i = 0; params[i]; i++) {
acpi_cm_update_object_reference (params[i], REF_DECREMENT);
}
}
/*
* Normal exit is with Status == AE_RETURN_VALUE when a Return_op has been
* executed, or with Status == AE_PENDING at end of AML block (end of
* Method code)
*/
if (*return_obj_desc) {
status = AE_CTRL_RETURN_VALUE;
}
return (status);
}
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