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/******************************************************************************
*
* Module Name: psxface - Parser external interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2005, R. Byron Moore
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer,
* without modification.
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
* substantially similar to the "NO WARRANTY" disclaimer below
* ("Disclaimer") and any redistribution must be conditioned upon
* including a substantially similar Disclaimer requirement for further
* binary redistribution.
* 3. Neither the names of the above-listed copyright holders nor the names
* of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* NO WARRANTY
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*/
#include <acpi/acpi.h>
#include <acpi/acparser.h>
#include <acpi/acdispat.h>
#include <acpi/acinterp.h>
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME("psxface")
/* Local Prototypes */
static acpi_status acpi_ps_execute_pass(struct acpi_parameter_info *info);
static void
acpi_ps_update_parameter_list(struct acpi_parameter_info *info, u16 action);
/*******************************************************************************
*
* FUNCTION: acpi_ps_execute_method
*
* PARAMETERS: Info - Method info block, contains:
* Node - Method Node to execute
* obj_desc - Method object
* Parameters - List of parameters to pass to the method,
* terminated by NULL. Params itself may be
* NULL if no parameters are being passed.
* return_object - Where to put method's return value (if
* any). If NULL, no value is returned.
* parameter_type - Type of Parameter list
* return_object - Where to put method's return value (if
* any). If NULL, no value is returned.
* pass_number - Parse or execute pass
*
* RETURN: Status
*
* DESCRIPTION: Execute a control method
*
******************************************************************************/
acpi_status acpi_ps_execute_method(struct acpi_parameter_info *info)
{
acpi_status status;
ACPI_FUNCTION_TRACE("ps_execute_method");
/* Validate the Info and method Node */
if (!info || !info->node) {
return_ACPI_STATUS(AE_NULL_ENTRY);
}
/* Init for new method, wait on concurrency semaphore */
status =
acpi_ds_begin_method_execution(info->node, info->obj_desc, NULL);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* The caller "owns" the parameters, so give each one an extra
* reference
*/
acpi_ps_update_parameter_list(info, REF_INCREMENT);
/*
* 1) Perform the first pass parse of the method to enter any
* named objects that it creates into the namespace
*/
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"**** Begin Method Parse **** Entry=%p obj=%p\n",
info->node, info->obj_desc));
info->pass_number = 1;
status = acpi_ps_execute_pass(info);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
/*
* 2) Execute the method. Performs second pass parse simultaneously
*/
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"**** Begin Method Execution **** Entry=%p obj=%p\n",
info->node, info->obj_desc));
info->pass_number = 3;
status = acpi_ps_execute_pass(info);
cleanup:
/* Take away the extra reference that we gave the parameters above */
acpi_ps_update_parameter_list(info, REF_DECREMENT);
/* Exit now if error above */
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/*
* If the method has returned an object, signal this to the caller with
* a control exception code
*/
if (info->return_object) {
ACPI_DEBUG_PRINT((ACPI_DB_PARSE,
"Method returned obj_desc=%p\n",
info->return_object));
ACPI_DUMP_STACK_ENTRY(info->return_object);
status = AE_CTRL_RETURN_VALUE;
}
return_ACPI_STATUS(status);
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_update_parameter_list
*
* PARAMETERS: Info - See struct acpi_parameter_info
* (Used: parameter_type and Parameters)
* Action - Add or Remove reference
*
* RETURN: Status
*
* DESCRIPTION: Update reference count on all method parameter objects
*
******************************************************************************/
static void
acpi_ps_update_parameter_list(struct acpi_parameter_info *info, u16 action)
{
acpi_native_uint i;
if ((info->parameter_type == ACPI_PARAM_ARGS) && (info->parameters)) {
/* Update reference count for each parameter */
for (i = 0; info->parameters[i]; i++) {
/* Ignore errors, just do them all */
(void)acpi_ut_update_object_reference(info->
parameters[i],
action);
}
}
}
/*******************************************************************************
*
* FUNCTION: acpi_ps_execute_pass
*
* PARAMETERS: Info - See struct acpi_parameter_info
* (Used: pass_number, Node, and obj_desc)
*
* RETURN: Status
*
* DESCRIPTION: Single AML pass: Parse or Execute a control method
*
******************************************************************************/
static acpi_status acpi_ps_execute_pass(struct acpi_parameter_info *info)
{
acpi_status status;
union acpi_parse_object *op;
struct acpi_walk_state *walk_state;
ACPI_FUNCTION_TRACE("ps_execute_pass");
/* Create and init a Root Node */
op = acpi_ps_create_scope_op();
if (!op) {
return_ACPI_STATUS(AE_NO_MEMORY);
}
/* Create and initialize a new walk state */
walk_state =
acpi_ds_create_walk_state(info->obj_desc->method.owner_id, NULL,
NULL, NULL);
if (!walk_state) {
status = AE_NO_MEMORY;
goto cleanup;
}
status = acpi_ds_init_aml_walk(walk_state, op, info->node,
info->obj_desc->method.aml_start,
info->obj_desc->method.aml_length,
info->pass_number == 1 ? NULL : info,
info->pass_number);
if (ACPI_FAILURE(status)) {
acpi_ds_delete_walk_state(walk_state);
goto cleanup;
}
/* Parse the AML */
status = acpi_ps_parse_aml(walk_state);
/* Walk state was deleted by parse_aml */
cleanup:
acpi_ps_delete_parse_tree(op);
return_ACPI_STATUS(status);
}
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