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

 *

 * Module Name: dswload2 - Dispatcher second pass namespace load callbacks

 *

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

/*

 * 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 "acparser.h"

#include "amlcode.h"

#include "acdispat.h"

#include "acinterp.h"

#include "acnamesp.h"

#include "acevents.h"

#define _COMPONENT          ACPI_DISPATCHER

ACPI_MODULE_NAME("dswload2")

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

 *

 * FUNCTION:    acpi_ds_load2_begin_op

 *

 * PARAMETERS:  walk_state      - Current state of the parse tree walk

 *              out_op          - Wher to return op if a new one is created

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Descending callback used during the loading of ACPI tables.

 *

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

acpi_status

acpi_ds_load2_begin_op(struct acpi_walk_state *walk_state,

		       union acpi_parse_object **out_op)

{

	union acpi_parse_object *op;

	struct acpi_namespace_node *node;

	acpi_status status;

	acpi_object_type object_type;

	char *buffer_ptr;

	u32 flags;

	ACPI_FUNCTION_TRACE(ds_load2_begin_op);

	op = walk_state->op;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,

			  walk_state));

	if (op) {

		if ((walk_state->control_state) &&

		    (walk_state->control_state->common.state ==

		     ACPI_CONTROL_CONDITIONAL_EXECUTING)) {

			/* We are executing a while loop outside of a method */

			status = acpi_ds_exec_begin_op(walk_state, out_op);

			return_ACPI_STATUS(status);

		}

		/* We only care about Namespace opcodes here */

		if ((!(walk_state->op_info->flags & AML_NSOPCODE) &&

		     (walk_state->opcode != AML_INT_NAMEPATH_OP)) ||

		    (!(walk_state->op_info->flags & AML_NAMED))) {

			return_ACPI_STATUS(AE_OK);

		}

		/* Get the name we are going to enter or lookup in the namespace */

		if (walk_state->opcode == AML_INT_NAMEPATH_OP) {

			/* For Namepath op, get the path string */

			buffer_ptr = op->common.value.string;

			if (!buffer_ptr) {

				/* No name, just exit */

				return_ACPI_STATUS(AE_OK);

			}

		} else {

			/* Get name from the op */

			buffer_ptr = ACPI_CAST_PTR(char, &op->named.name);

		}

	} else {

		/* Get the namestring from the raw AML */

		buffer_ptr =

		    acpi_ps_get_next_namestring(&walk_state->parser_state);

	}

	/* Map the opcode into an internal object type */

	object_type = walk_state->op_info->object_type;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

			  "State=%p Op=%p Type=%X\n", walk_state, op,

			  object_type));

	switch (walk_state->opcode) {

	case AML_FIELD_OP:

	case AML_BANK_FIELD_OP:

	case AML_INDEX_FIELD_OP:

		node = NULL;

		status = AE_OK;

		break;

	case AML_INT_NAMEPATH_OP:

		/*

		 * The name_path is an object reference to an existing object.

		 * Don't enter the name into the namespace, but look it up

		 * for use later.

		 */

		status =

		    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,

				   object_type, ACPI_IMODE_EXECUTE,

				   ACPI_NS_SEARCH_PARENT, walk_state, &(node));

		break;

	case AML_SCOPE_OP:

		/* Special case for Scope(\) -> refers to the Root node */

		if (op && (op->named.node == acpi_gbl_root_node)) {

			node = op->named.node;

			status =

			    acpi_ds_scope_stack_push(node, object_type,

						     walk_state);

			if (ACPI_FAILURE(status)) {

				return_ACPI_STATUS(status);

			}

		} else {

			/*

			 * The Path is an object reference to an existing object.

			 * Don't enter the name into the namespace, but look it up

			 * for use later.

			 */

			status =

			    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,

					   object_type, ACPI_IMODE_EXECUTE,

					   ACPI_NS_SEARCH_PARENT, walk_state,

					   &(node));

			if (ACPI_FAILURE(status)) {

#ifdef ACPI_ASL_COMPILER

				if (status == AE_NOT_FOUND) {

					status = AE_OK;

				} else {

					ACPI_ERROR_NAMESPACE(buffer_ptr,

							     status);

				}

#else

				ACPI_ERROR_NAMESPACE(buffer_ptr, status);

#endif

				return_ACPI_STATUS(status);

			}

		}

		/*

		 * We must check to make sure that the target is

		 * one of the opcodes that actually opens a scope

		 */

		switch (node->type) {

		case ACPI_TYPE_ANY:

		case ACPI_TYPE_LOCAL_SCOPE:	/* Scope */

		case ACPI_TYPE_DEVICE:

		case ACPI_TYPE_POWER:

		case ACPI_TYPE_PROCESSOR:

		case ACPI_TYPE_THERMAL:

			/* These are acceptable types */

			break;

		case ACPI_TYPE_INTEGER:

		case ACPI_TYPE_STRING:

		case ACPI_TYPE_BUFFER:

			/*

			 * These types we will allow, but we will change the type.

			 * This enables some existing code of the form:

			 *

			 *  Name (DEB, 0)

			 *  Scope (DEB) { ... }

			 */

			ACPI_WARNING((AE_INFO,

				      "Type override - [%4.4s] had invalid type (%s) "

				      "for Scope operator, changed to type ANY",

				      acpi_ut_get_node_name(node),

				      acpi_ut_get_type_name(node->type)));

			node->type = ACPI_TYPE_ANY;

			walk_state->scope_info->common.value = ACPI_TYPE_ANY;

			break;

		case ACPI_TYPE_METHOD:

			/*

			 * Allow scope change to root during execution of module-level

			 * code. Root is typed METHOD during this time.

			 */

			if ((node == acpi_gbl_root_node) &&

			    (walk_state->

			     parse_flags & ACPI_PARSE_MODULE_LEVEL)) {

				break;

			}

			/*lint -fallthrough */

		default:

			/* All other types are an error */

			ACPI_ERROR((AE_INFO,

				    "Invalid type (%s) for target of "

				    "Scope operator [%4.4s] (Cannot override)",

				    acpi_ut_get_type_name(node->type),

				    acpi_ut_get_node_name(node)));

			return_ACPI_STATUS(AE_AML_OPERAND_TYPE);

		}

		break;

	default:

		/* All other opcodes */

		if (op && op->common.node) {

			/* This op/node was previously entered into the namespace */

			node = op->common.node;

			if (acpi_ns_opens_scope(object_type)) {

				status =

				    acpi_ds_scope_stack_push(node, object_type,

							     walk_state);

				if (ACPI_FAILURE(status)) {

					return_ACPI_STATUS(status);

				}

			}

			return_ACPI_STATUS(AE_OK);

		}

		/*

		 * Enter the named type into the internal namespace. We enter the name

		 * as we go downward in the parse tree. Any necessary subobjects that

		 * involve arguments to the opcode must be created as we go back up the

		 * parse tree later.

		 *

		 * Note: Name may already exist if we are executing a deferred opcode.

		 */

		if (walk_state->deferred_node) {

			/* This name is already in the namespace, get the node */

			node = walk_state->deferred_node;

			status = AE_OK;

			break;

		}

		flags = ACPI_NS_NO_UPSEARCH;

		if (walk_state->pass_number == ACPI_IMODE_EXECUTE) {

			/* Execution mode, node cannot already exist, node is temporary */

			flags |= ACPI_NS_ERROR_IF_FOUND;

			if (!

			    (walk_state->

			     parse_flags & ACPI_PARSE_MODULE_LEVEL)) {

				flags |= ACPI_NS_TEMPORARY;

			}

		}

		/* Add new entry or lookup existing entry */

		status =

		    acpi_ns_lookup(walk_state->scope_info, buffer_ptr,

				   object_type, ACPI_IMODE_LOAD_PASS2, flags,

				   walk_state, &node);

		if (ACPI_SUCCESS(status) && (flags & ACPI_NS_TEMPORARY)) {

			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

					  "***New Node [%4.4s] %p is temporary\n",

					  acpi_ut_get_node_name(node), node));

		}

		break;

	}

	if (ACPI_FAILURE(status)) {

		ACPI_ERROR_NAMESPACE(buffer_ptr, status);

		return_ACPI_STATUS(status);

	}

	if (!op) {

		/* Create a new op */

		op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);

		if (!op) {

			return_ACPI_STATUS(AE_NO_MEMORY);

		}

		/* Initialize the new op */

		if (node) {

			op->named.name = node->name.integer;

		}

		*out_op = op;

	}

	/*

	 * Put the Node in the "op" object that the parser uses, so we

	 * can get it again quickly when this scope is closed

	 */

	op->common.node = node;

	return_ACPI_STATUS(status);

}

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

 *

 * FUNCTION:    acpi_ds_load2_end_op

 *

 * PARAMETERS:  walk_state      - Current state of the parse tree walk

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Ascending callback used during the loading of the namespace,

 *              both control methods and everything else.

 *

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

acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state)

{

	union acpi_parse_object *op;

	acpi_status status = AE_OK;

	acpi_object_type object_type;

	struct acpi_namespace_node *node;

	union acpi_parse_object *arg;

	struct acpi_namespace_node *new_node;

#ifndef ACPI_NO_METHOD_EXECUTION

	u32 i;

	u8 region_space;

#endif

	ACPI_FUNCTION_TRACE(ds_load2_end_op);

	op = walk_state->op;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",

			  walk_state->op_info->name, op, walk_state));

	/* Check if opcode had an associated namespace object */

	if (!(walk_state->op_info->flags & AML_NSOBJECT)) {

		return_ACPI_STATUS(AE_OK);

	}

	if (op->common.aml_opcode == AML_SCOPE_OP) {

		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

				  "Ending scope Op=%p State=%p\n", op,

				  walk_state));

	}

	object_type = walk_state->op_info->object_type;

	/*

	 * Get the Node/name from the earlier lookup

	 * (It was saved in the *op structure)

	 */

	node = op->common.node;

	/*

	 * Put the Node on the object stack (Contains the ACPI Name of

	 * this object)

	 */

	walk_state->operands[0] = (void *)node;

	walk_state->num_operands = 1;

	/* Pop the scope stack */

	if (acpi_ns_opens_scope(object_type) &&

	    (op->common.aml_opcode != AML_INT_METHODCALL_OP)) {

		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

				  "(%s) Popping scope for Op %p\n",

				  acpi_ut_get_type_name(object_type), op));

		status = acpi_ds_scope_stack_pop(walk_state);

		if (ACPI_FAILURE(status)) {

			goto cleanup;

		}

	}

	/*

	 * Named operations are as follows:

	 *

	 * AML_ALIAS

	 * AML_BANKFIELD

	 * AML_CREATEBITFIELD

	 * AML_CREATEBYTEFIELD

	 * AML_CREATEDWORDFIELD

	 * AML_CREATEFIELD

	 * AML_CREATEQWORDFIELD

	 * AML_CREATEWORDFIELD

	 * AML_DATA_REGION

	 * AML_DEVICE

	 * AML_EVENT

	 * AML_FIELD

	 * AML_INDEXFIELD

	 * AML_METHOD

	 * AML_METHODCALL

	 * AML_MUTEX

	 * AML_NAME

	 * AML_NAMEDFIELD

	 * AML_OPREGION

	 * AML_POWERRES

	 * AML_PROCESSOR

	 * AML_SCOPE

	 * AML_THERMALZONE

	 */

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

			  "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",

			  acpi_ps_get_opcode_name(op->common.aml_opcode),

			  walk_state, op, node));

	/* Decode the opcode */

	arg = op->common.value.arg;

	switch (walk_state->op_info->type) {

#ifndef ACPI_NO_METHOD_EXECUTION

	case AML_TYPE_CREATE_FIELD:

		/*

		 * Create the field object, but the field buffer and index must

		 * be evaluated later during the execution phase

		 */

		status = acpi_ds_create_buffer_field(op, walk_state);

		break;

	case AML_TYPE_NAMED_FIELD:

		/*

		 * If we are executing a method, initialize the field

		 */

		if (walk_state->method_node) {

			status = acpi_ds_init_field_objects(op, walk_state);

		}

		switch (op->common.aml_opcode) {

		case AML_INDEX_FIELD_OP:

			status =

			    acpi_ds_create_index_field(op,

						       (acpi_handle) arg->

						       common.node, walk_state);

			break;

		case AML_BANK_FIELD_OP:

			status =

			    acpi_ds_create_bank_field(op, arg->common.node,

						      walk_state);

			break;

		case AML_FIELD_OP:

			status =

			    acpi_ds_create_field(op, arg->common.node,

						 walk_state);

			break;

		default:

			/* All NAMED_FIELD opcodes must be handled above */

			break;

		}

		break;

	case AML_TYPE_NAMED_SIMPLE:

		status = acpi_ds_create_operands(walk_state, arg);

		if (ACPI_FAILURE(status)) {

			goto cleanup;

		}

		switch (op->common.aml_opcode) {

		case AML_PROCESSOR_OP:

			status = acpi_ex_create_processor(walk_state);

			break;

		case AML_POWER_RES_OP:

			status = acpi_ex_create_power_resource(walk_state);

			break;

		case AML_MUTEX_OP:

			status = acpi_ex_create_mutex(walk_state);

			break;

		case AML_EVENT_OP:

			status = acpi_ex_create_event(walk_state);

			break;

		case AML_ALIAS_OP:

			status = acpi_ex_create_alias(walk_state);

			break;

		default:

			/* Unknown opcode */

			status = AE_OK;

			goto cleanup;

		}

		/* Delete operands */

		for (i = 1; i < walk_state->num_operands; i++) {

			acpi_ut_remove_reference(walk_state->operands[i]);

			walk_state->operands[i] = NULL;

		}

		break;

#endif				/* ACPI_NO_METHOD_EXECUTION */

	case AML_TYPE_NAMED_COMPLEX:

		switch (op->common.aml_opcode) {

#ifndef ACPI_NO_METHOD_EXECUTION

		case AML_REGION_OP:

		case AML_DATA_REGION_OP:

			if (op->common.aml_opcode == AML_REGION_OP) {

				region_space = (acpi_adr_space_type)

				    ((op->common.value.arg)->common.value.

				     integer);

			} else {

				region_space = ACPI_ADR_SPACE_DATA_TABLE;

			}

			/*

			 * The op_region is not fully parsed at this time. The only valid

			 * argument is the space_id. (We must save the address of the

			 * AML of the address and length operands)

			 *

			 * If we have a valid region, initialize it. The namespace is

			 * unlocked at this point.

			 *

			 * Need to unlock interpreter if it is locked (if we are running

			 * a control method), in order to allow _REG methods to be run

			 * during acpi_ev_initialize_region.

			 */

			if (walk_state->method_node) {

				/*

				 * Executing a method: initialize the region and unlock

				 * the interpreter

				 */

				status =

				    acpi_ex_create_region(op->named.data,

							  op->named.length,

							  region_space,

							  walk_state);

				if (ACPI_FAILURE(status)) {

					return_ACPI_STATUS(status);

				}

				acpi_ex_exit_interpreter();

			}

			status =

			    acpi_ev_initialize_region

			    (acpi_ns_get_attached_object(node), FALSE);

			if (walk_state->method_node) {

				acpi_ex_enter_interpreter();

			}

			if (ACPI_FAILURE(status)) {

				/*

				 *  If AE_NOT_EXIST is returned, it is not fatal

				 *  because many regions get created before a handler

				 *  is installed for said region.

				 */

				if (AE_NOT_EXIST == status) {

					status = AE_OK;

				}

			}

			break;

		case AML_NAME_OP:

			status = acpi_ds_create_node(walk_state, node, op);

			break;

		case AML_METHOD_OP:

			/*

			 * method_op pkg_length name_string method_flags term_list

			 *

			 * Note: We must create the method node/object pair as soon as we

			 * see the method declaration. This allows later pass1 parsing

			 * of invocations of the method (need to know the number of

			 * arguments.)

			 */

			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

					  "LOADING-Method: State=%p Op=%p NamedObj=%p\n",

					  walk_state, op, op->named.node));

			if (!acpi_ns_get_attached_object(op->named.node)) {

				walk_state->operands[0] =

				    ACPI_CAST_PTR(void, op->named.node);

				walk_state->num_operands = 1;

				status =

				    acpi_ds_create_operands(walk_state,

							    op->common.value.

							    arg);

				if (ACPI_SUCCESS(status)) {

					status =

					    acpi_ex_create_method(op->named.

								  data,

								  op->named.

								  length,

								  walk_state);

				}

				walk_state->operands[0] = NULL;

				walk_state->num_operands = 0;

				if (ACPI_FAILURE(status)) {

					return_ACPI_STATUS(status);

				}

			}

			break;

#endif				/* ACPI_NO_METHOD_EXECUTION */

		default:

			/* All NAMED_COMPLEX opcodes must be handled above */

			break;

		}

		break;

	case AML_CLASS_INTERNAL:

		/* case AML_INT_NAMEPATH_OP: */

		break;

	case AML_CLASS_METHOD_CALL:

		ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,

				  "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",

				  walk_state, op, node));

		/*

		 * Lookup the method name and save the Node

		 */

		status =

		    acpi_ns_lookup(walk_state->scope_info,

				   arg->common.value.string, ACPI_TYPE_ANY,

				   ACPI_IMODE_LOAD_PASS2,

				   ACPI_NS_SEARCH_PARENT |

				   ACPI_NS_DONT_OPEN_SCOPE, walk_state,

				   &(new_node));

		if (ACPI_SUCCESS(status)) {

			/*

			 * Make sure that what we found is indeed a method

			 * We didn't search for a method on purpose, to see if the name

			 * would resolve

			 */

			if (new_node->type != ACPI_TYPE_METHOD) {

				status = AE_AML_OPERAND_TYPE;

			}

			/* We could put the returned object (Node) on the object stack for

			 * later, but for now, we will put it in the "op" object that the

			 * parser uses, so we can get it again at the end of this scope

			 */

			op->common.node = new_node;

		} else {

			ACPI_ERROR_NAMESPACE(arg->common.value.string, status);

		}

		break;

	default:

		break;

	}

cleanup:

	/* Remove the Node pushed at the very beginning */

	walk_state->operands[0] = NULL;

	walk_state->num_operands = 0;

	return_ACPI_STATUS(status);

}