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/******************************************************************************

 *

 * Module Name: psxface - Parser external interfaces

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2007, 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 void acpi_ps_start_trace(struct acpi_evaluate_info *info);

static void acpi_ps_stop_trace(struct acpi_evaluate_info *info);

static void

acpi_ps_update_parameter_list(struct acpi_evaluate_info *info, u16 action);

/*******************************************************************************

 *

 * FUNCTION:    acpi_debug_trace

 *

 * PARAMETERS:  method_name     - Valid ACPI name string

 *              debug_level     - Optional level mask. 0 to use default

 *              debug_layer     - Optional layer mask. 0 to use default

 *              Flags           - bit 1: one shot(1) or persistent(0)

 *

 * RETURN:      Status

 *

 * DESCRIPTION: External interface to enable debug tracing during control

 *              method execution

 *

 ******************************************************************************/

acpi_status

acpi_debug_trace(char *name, u32 debug_level, u32 debug_layer, u32 flags)

{

        acpi_status status;

        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        /* TBDs: Validate name, allow full path or just nameseg */

        acpi_gbl_trace_method_name = *ACPI_CAST_PTR(u32, name);

        acpi_gbl_trace_flags = flags;

        if (debug_level) {

                acpi_gbl_trace_dbg_level = debug_level;

        }

        if (debug_layer) {

                acpi_gbl_trace_dbg_layer = debug_layer;

        }

        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

        return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_start_trace

 *

 * PARAMETERS:  Info        - Method info struct

 *

 * RETURN:      None

 *

 * DESCRIPTION: Start control method execution trace

 *

 ******************************************************************************/

static void acpi_ps_start_trace(struct acpi_evaluate_info *info)

{

        acpi_status status;

        ACPI_FUNCTION_ENTRY();

        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);

        if (ACPI_FAILURE(status)) {

                return;

        }

        if ((!acpi_gbl_trace_method_name) ||

            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {

                goto exit;

        }

        acpi_gbl_original_dbg_level = acpi_dbg_level;

        acpi_gbl_original_dbg_layer = acpi_dbg_layer;

        acpi_dbg_level = 0x00FFFFFF;

        acpi_dbg_layer = ACPI_UINT32_MAX;

        if (acpi_gbl_trace_dbg_level) {

                acpi_dbg_level = acpi_gbl_trace_dbg_level;

        }

        if (acpi_gbl_trace_dbg_layer) {

                acpi_dbg_layer = acpi_gbl_trace_dbg_layer;

        }

      exit:

        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ps_stop_trace

 *

 * PARAMETERS:  Info        - Method info struct

 *

 * RETURN:      None

 *

 * DESCRIPTION: Stop control method execution trace

 *

 ******************************************************************************/

static void acpi_ps_stop_trace(struct acpi_evaluate_info *info)

{

        acpi_status status;

        ACPI_FUNCTION_ENTRY();

        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);

        if (ACPI_FAILURE(status)) {

                return;

        }

        if ((!acpi_gbl_trace_method_name) ||

            (acpi_gbl_trace_method_name != info->resolved_node->name.integer)) {

                goto exit;

        }

        /* Disable further tracing if type is one-shot */

        if (acpi_gbl_trace_flags & 1) {

                acpi_gbl_trace_method_name = 0;

                acpi_gbl_trace_dbg_level = 0;

                acpi_gbl_trace_dbg_layer = 0;

        }

        acpi_dbg_level = acpi_gbl_original_dbg_level;

        acpi_dbg_layer = acpi_gbl_original_dbg_layer;

      exit:

        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);

}

/*******************************************************************************

 *

 * 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_evaluate_info *info)

{

        acpi_status status;

        union acpi_parse_object *op;

        struct acpi_walk_state *walk_state;

        ACPI_FUNCTION_TRACE(ps_execute_method);

        /* Validate the Info and method Node */

        if (!info || !info->resolved_node) {

                return_ACPI_STATUS(AE_NULL_ENTRY);

        }

        /* Init for new method, wait on concurrency semaphore */

        status =

            acpi_ds_begin_method_execution(info->resolved_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);

        /* Begin tracing if requested */

        acpi_ps_start_trace(info);

        /*

         * Execute the method. Performs parse simultaneously

         */

        ACPI_DEBUG_PRINT((ACPI_DB_PARSE,

                          "**** Begin Method Parse/Execute [%4.4s] **** Node=%p Obj=%p\n",

                          info->resolved_node->name.ascii, info->resolved_node,

                          info->obj_desc));

        /* Create and init a Root Node */

        op = acpi_ps_create_scope_op();

        if (!op) {

                status = AE_NO_MEMORY;

                goto cleanup;

        }

        /* Create and initialize a new walk state */

        info->pass_number = ACPI_IMODE_EXECUTE;

        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->resolved_node,

                                       info->obj_desc->method.aml_start,

                                       info->obj_desc->method.aml_length, 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);

        /* End optional tracing */

        acpi_ps_stop_trace(info);

        /* 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 ObjDesc=%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_evaluate_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_evaluate_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);

                }

        }

}