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

 *

 * Module Name: excreate - Named object creation

 *

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

/*

 * Copyright (C) 2000 - 2015, Intel Corp.

 * 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 

#include "accommon.h"

#include "acinterp.h"

#include "amlcode.h"

#include "acnamesp.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) {

		/* For these types, the sub-object can change dynamically via a Store */

	case ACPI_TYPE_INTEGER:

	case ACPI_TYPE_STRING:

	case ACPI_TYPE_BUFFER:

	case ACPI_TYPE_PACKAGE:

	case ACPI_TYPE_BUFFER_FIELD:

		/*

		 * These types open a new scope, so we need the NS node in order to access

		 * any children.

		 */

	case ACPI_TYPE_DEVICE:

	case ACPI_TYPE_POWER:

	case ACPI_TYPE_PROCESSOR:

	case ACPI_TYPE_THERMAL:

	case ACPI_TYPE_LOCAL_SCOPE:

		/*

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

		 * NS node, not the object itself.

		 */

		alias_node->type = ACPI_TYPE_LOCAL_ALIAS;

		alias_node->object =

		    ACPI_CAST_PTR(union acpi_operand_object, target_node);

		break;

	case ACPI_TYPE_METHOD:

		/*

		 * Control method aliases need to be differentiated

		 */

		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

 *              space_id            - Address 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 space_id, 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 (!acpi_is_valid_space_id(space_id)) {

		/*

		 * Print an error message, but continue. We don't want to abort

		 * a table load for this exception. Instead, if the region is

		 * actually used at runtime, abort the executing method.

		 */

		ACPI_ERROR((AE_INFO,

			    "Invalid/unknown Address Space ID: 0x%2.2X",

			    space_id));

	}

	ACPI_DEBUG_PRINT((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",

			  acpi_ut_get_region_name(space_id), space_id));

	/* 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;

	if (walk_state->scope_info) {

		region_obj2->extra.scope_node =

		    walk_state->scope_info->scope.node;

	} else {

		region_obj2->extra.scope_node = node;

	}

	/* Init the region from the operands */

	obj_desc->region.space_id = space_id;

	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_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;

	obj_desc->method.node = operand[0];

	/*

	 * Disassemble the method flags. Split off the arg_count, Serialized

	 * flag, and sync_level for efficiency.

	 */

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

	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) {

		obj_desc->method.info_flags = ACPI_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_SYNC_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);

}