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

 *

 * Module Name: excreate - Named object creation

 *

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

/*

 * 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/acinterp.h>

#include <acpi/amlcode.h>

#include <acpi/acnamesp.h>

#include <acpi/acevents.h>

#include <acpi/actables.h>

#define _COMPONENT          ACPI_EXECUTER

ACPI_MODULE_NAME("excreate")

#ifndef ACPI_NO_METHOD_EXECUTION

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

 *

 * FUNCTION:    acpi_ex_create_alias

 *

 * PARAMETERS:  walk_state           - Current state, contains operands

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new named alias

 *

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

acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)

{

        struct acpi_namespace_node *target_node;

        struct acpi_namespace_node *alias_node;

        acpi_status status = AE_OK;

        ACPI_FUNCTION_TRACE(ex_create_alias);

        /* Get the source/alias operands (both namespace nodes) */

        alias_node = (struct acpi_namespace_node *)walk_state->operands[0];

        target_node = (struct acpi_namespace_node *)walk_state->operands[1];

        if ((target_node->type == ACPI_TYPE_LOCAL_ALIAS) ||

            (target_node->type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {

                /*

                 * Dereference an existing alias so that we don't create a chain

                 * of aliases.  With this code, we guarantee that an alias is

                 * always exactly one level of indirection away from the

                 * actual aliased name.

                 */

                target_node =

                    ACPI_CAST_PTR(struct acpi_namespace_node,

                                  target_node->object);

        }

        /*

         * For objects that can never change (i.e., the NS node will

         * permanently point to the same object), we can simply attach

         * the object to the new NS node.  For other objects (such as

         * Integers, buffers, etc.), we have to point the Alias node

         * to the original Node.

         */

        switch (target_node->type) {

        case ACPI_TYPE_INTEGER:

        case ACPI_TYPE_STRING:

        case ACPI_TYPE_BUFFER:

        case ACPI_TYPE_PACKAGE:

        case ACPI_TYPE_BUFFER_FIELD:

                /*

                 * The new alias has the type ALIAS and points to the original

                 * NS node, not the object itself.  This is because for these

                 * types, the object can change dynamically via a Store.

                 */

                alias_node->type = ACPI_TYPE_LOCAL_ALIAS;

                alias_node->object =

                    ACPI_CAST_PTR(union acpi_operand_object, target_node);

                break;

        case ACPI_TYPE_METHOD:

                /*

                 * The new alias has the type ALIAS and points to the original

                 * NS node, not the object itself.  This is because for these

                 * types, the object can change dynamically via a Store.

                 */

                alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;

                alias_node->object =

                    ACPI_CAST_PTR(union acpi_operand_object, target_node);

                break;

        default:

                /* Attach the original source object to the new Alias Node */

                /*

                 * The new alias assumes the type of the target, and it points

                 * to the same object.  The reference count of the object has an

                 * additional reference to prevent deletion out from under either the

                 * target node or the alias Node

                 */

                status = acpi_ns_attach_object(alias_node,

                                               acpi_ns_get_attached_object

                                               (target_node),

                                               target_node->type);

                break;

        }

        /* Since both operands are Nodes, we don't need to delete them */

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_event

 *

 * PARAMETERS:  walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new event object

 *

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

acpi_status acpi_ex_create_event(struct acpi_walk_state *walk_state)

{

        acpi_status status;

        union acpi_operand_object *obj_desc;

        ACPI_FUNCTION_TRACE(ex_create_event);

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_EVENT);

        if (!obj_desc) {

                status = AE_NO_MEMORY;

                goto cleanup;

        }

        /*

         * Create the actual OS semaphore, with zero initial units -- meaning

         * that the event is created in an unsignalled state

         */

        status = acpi_os_create_semaphore(ACPI_NO_UNIT_LIMIT, 0,

                                          &obj_desc->event.os_semaphore);

        if (ACPI_FAILURE(status)) {

                goto cleanup;

        }

        /* Attach object to the Node */

        status =

            acpi_ns_attach_object((struct acpi_namespace_node *)walk_state->

                                  operands[0], obj_desc, ACPI_TYPE_EVENT);

      cleanup:

        /*

         * Remove local reference to the object (on error, will cause deletion

         * of both object and semaphore if present.)

         */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_mutex

 *

 * PARAMETERS:  walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new mutex object

 *

 *              Mutex (Name[0], sync_level[1])

 *

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

acpi_status acpi_ex_create_mutex(struct acpi_walk_state *walk_state)

{

        acpi_status status = AE_OK;

        union acpi_operand_object *obj_desc;

        ACPI_FUNCTION_TRACE_PTR(ex_create_mutex, ACPI_WALK_OPERANDS);

        /* Create the new mutex object */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_MUTEX);

        if (!obj_desc) {

                status = AE_NO_MEMORY;

                goto cleanup;

        }

        /* Create the actual OS Mutex */

        status = acpi_os_create_mutex(&obj_desc->mutex.os_mutex);

        if (ACPI_FAILURE(status)) {

                goto cleanup;

        }

        /* Init object and attach to NS node */

        obj_desc->mutex.sync_level =

            (u8) walk_state->operands[1]->integer.value;

        obj_desc->mutex.node =

            (struct acpi_namespace_node *)walk_state->operands[0];

        status =

            acpi_ns_attach_object(obj_desc->mutex.node, obj_desc,

                                  ACPI_TYPE_MUTEX);

      cleanup:

        /*

         * Remove local reference to the object (on error, will cause deletion

         * of both object and semaphore if present.)

         */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_region

 *

 * PARAMETERS:  aml_start           - Pointer to the region declaration AML

 *              aml_length          - Max length of the declaration AML

 *              region_space        - space_iD for the region

 *              walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new operation region object

 *

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

acpi_status

acpi_ex_create_region(u8 * aml_start,

                      u32 aml_length,

                      u8 region_space, struct acpi_walk_state *walk_state)

{

        acpi_status status;

        union acpi_operand_object *obj_desc;

        struct acpi_namespace_node *node;

        union acpi_operand_object *region_obj2;

        ACPI_FUNCTION_TRACE(ex_create_region);

        /* Get the Namespace Node */

        node = walk_state->op->common.node;

        /*

         * If the region object is already attached to this node,

         * just return

         */

        if (acpi_ns_get_attached_object(node)) {

                return_ACPI_STATUS(AE_OK);

        }

        /*

         * Space ID must be one of the predefined IDs, or in the user-defined

         * range

         */

        if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) &&

            (region_space < ACPI_USER_REGION_BEGIN)) {

                ACPI_ERROR((AE_INFO, "Invalid AddressSpace type %X",

                            region_space));

                return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID);

        }

        ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (%X)\n",

                          acpi_ut_get_region_name(region_space), region_space));

        /* Create the region descriptor */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);

        if (!obj_desc) {

                status = AE_NO_MEMORY;

                goto cleanup;

        }

        /*

         * Remember location in AML stream of address & length

         * operands since they need to be evaluated at run time.

         */

        region_obj2 = obj_desc->common.next_object;

        region_obj2->extra.aml_start = aml_start;

        region_obj2->extra.aml_length = aml_length;

        /* Init the region from the operands */

        obj_desc->region.space_id = region_space;

        obj_desc->region.address = 0;

        obj_desc->region.length = 0;

        obj_desc->region.node = node;

        /* Install the new region object in the parent Node */

        status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);

      cleanup:

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_table_region

 *

 * PARAMETERS:  walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new data_table_region object

 *

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

acpi_status acpi_ex_create_table_region(struct acpi_walk_state *walk_state)

{

        acpi_status status;

        union acpi_operand_object **operand = &walk_state->operands[0];

        union acpi_operand_object *obj_desc;

        struct acpi_namespace_node *node;

        union acpi_operand_object *region_obj2;

        acpi_native_uint table_index;

        struct acpi_table_header *table;

        ACPI_FUNCTION_TRACE(ex_create_table_region);

        /* Get the Node from the object stack  */

        node = walk_state->op->common.node;

        /*

         * If the region object is already attached to this node,

         * just return

         */

        if (acpi_ns_get_attached_object(node)) {

                return_ACPI_STATUS(AE_OK);

        }

        /* Find the ACPI table */

        status = acpi_tb_find_table(operand[1]->string.pointer,

                                    operand[2]->string.pointer,

                                    operand[3]->string.pointer, &table_index);

        if (ACPI_FAILURE(status)) {

                return_ACPI_STATUS(status);

        }

        /* Create the region descriptor */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_REGION);

        if (!obj_desc) {

                return_ACPI_STATUS(AE_NO_MEMORY);

        }

        region_obj2 = obj_desc->common.next_object;

        region_obj2->extra.region_context = NULL;

        status = acpi_get_table_by_index(table_index, &table);

        if (ACPI_FAILURE(status)) {

                return_ACPI_STATUS(status);

        }

        /* Init the region from the operands */

        obj_desc->region.space_id = REGION_DATA_TABLE;

        obj_desc->region.address =

            (acpi_physical_address) ACPI_TO_INTEGER(table);

        obj_desc->region.length = table->length;

        obj_desc->region.node = node;

        obj_desc->region.flags = AOPOBJ_DATA_VALID;

        /* Install the new region object in the parent Node */

        status = acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_REGION);

        if (ACPI_FAILURE(status)) {

                goto cleanup;

        }

        status = acpi_ev_initialize_region(obj_desc, FALSE);

        if (ACPI_FAILURE(status)) {

                if (status == AE_NOT_EXIST) {

                        status = AE_OK;

                } else {

                        goto cleanup;

                }

        }

        obj_desc->region.flags |= AOPOBJ_SETUP_COMPLETE;

      cleanup:

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_processor

 *

 * PARAMETERS:  walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new processor object and populate the fields

 *

 *              Processor (Name[0], cpu_iD[1], pblock_addr[2], pblock_length[3])

 *

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

acpi_status acpi_ex_create_processor(struct acpi_walk_state *walk_state)

{

        union acpi_operand_object **operand = &walk_state->operands[0];

        union acpi_operand_object *obj_desc;

        acpi_status status;

        ACPI_FUNCTION_TRACE_PTR(ex_create_processor, walk_state);

        /* Create the processor object */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_PROCESSOR);

        if (!obj_desc) {

                return_ACPI_STATUS(AE_NO_MEMORY);

        }

        /* Initialize the processor object from the operands */

        obj_desc->processor.proc_id = (u8) operand[1]->integer.value;

        obj_desc->processor.length = (u8) operand[3]->integer.value;

        obj_desc->processor.address =

            (acpi_io_address) operand[2]->integer.value;

        /* Install the processor object in the parent Node */

        status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],

                                       obj_desc, ACPI_TYPE_PROCESSOR);

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ex_create_power_resource

 *

 * PARAMETERS:  walk_state          - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new power_resource object and populate the fields

 *

 *              power_resource (Name[0], system_level[1], resource_order[2])

 *

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

acpi_status acpi_ex_create_power_resource(struct acpi_walk_state *walk_state)

{

        union acpi_operand_object **operand = &walk_state->operands[0];

        acpi_status status;

        union acpi_operand_object *obj_desc;

        ACPI_FUNCTION_TRACE_PTR(ex_create_power_resource, walk_state);

        /* Create the power resource object */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_POWER);

        if (!obj_desc) {

                return_ACPI_STATUS(AE_NO_MEMORY);

        }

        /* Initialize the power object from the operands */

        obj_desc->power_resource.system_level = (u8) operand[1]->integer.value;

        obj_desc->power_resource.resource_order =

            (u16) operand[2]->integer.value;

        /* Install the  power resource object in the parent Node */

        status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],

                                       obj_desc, ACPI_TYPE_POWER);

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);

        return_ACPI_STATUS(status);

}

#endif

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

 *

 * FUNCTION:    acpi_ex_create_method

 *

 * PARAMETERS:  aml_start       - First byte of the method's AML

 *              aml_length      - AML byte count for this method

 *              walk_state      - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create a new method object

 *

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

acpi_status

acpi_ex_create_method(u8 * aml_start,

                      u32 aml_length, struct acpi_walk_state *walk_state)

{

        union acpi_operand_object **operand = &walk_state->operands[0];

        union acpi_operand_object *obj_desc;

        acpi_status status;

        u8 method_flags;

        ACPI_FUNCTION_TRACE_PTR(ex_create_method, walk_state);

        /* Create a new method object */

        obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_METHOD);

        if (!obj_desc) {

                status = AE_NO_MEMORY;

                goto exit;

        }

        /* Save the method's AML pointer and length  */

        obj_desc->method.aml_start = aml_start;

        obj_desc->method.aml_length = aml_length;

        /*

         * Disassemble the method flags. Split off the Arg Count

         * for efficiency

         */

        method_flags = (u8) operand[1]->integer.value;

        obj_desc->method.method_flags =

            (u8) (method_flags & ~AML_METHOD_ARG_COUNT);

        obj_desc->method.param_count =

            (u8) (method_flags & AML_METHOD_ARG_COUNT);

        /*

         * Get the sync_level. If method is serialized, a mutex will be

         * created for this method when it is parsed.

         */

        if (method_flags & AML_METHOD_SERIALIZED) {

                /*

                 * ACPI 1.0: sync_level = 0

                 * ACPI 2.0: sync_level = sync_level in method declaration

                 */

                obj_desc->method.sync_level = (u8)

                    ((method_flags & AML_METHOD_SYNCH_LEVEL) >> 4);

        }

        /* Attach the new object to the method Node */

        status = acpi_ns_attach_object((struct acpi_namespace_node *)operand[0],

                                       obj_desc, ACPI_TYPE_METHOD);

        /* Remove local reference to the object */

        acpi_ut_remove_reference(obj_desc);

      exit:

        /* Remove a reference to the operand */

        acpi_ut_remove_reference(operand[1]);

        return_ACPI_STATUS(status);

}