[linux-2.6-block.git] / drivers / acpi / acpica / dswload.c

/******************************************************************************
 *
 * Module Name: dswload - Dispatcher first pass namespace load callbacks
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2016, 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 <acpi/acpi.h>
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"

#ifdef ACPI_ASL_COMPILER
#include "acdisasm.h"
#endif

#define _COMPONENT          ACPI_DISPATCHER
ACPI_MODULE_NAME("dswload")

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_init_callbacks
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              pass_number     - 1, 2, or 3
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Init walk state callbacks
 *
 ******************************************************************************/
acpi_status
acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
{

	switch (pass_number) {
	case 0:

		/* Parse only - caller will setup callbacks */

		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
		    ACPI_PARSE_DELETE_TREE | ACPI_PARSE_DISASSEMBLE;
		walk_state->descending_callback = NULL;
		walk_state->ascending_callback = NULL;
		break;

	case 1:

		/* Load pass 1 */

		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
		    ACPI_PARSE_DELETE_TREE;
		walk_state->descending_callback = acpi_ds_load1_begin_op;
		walk_state->ascending_callback = acpi_ds_load1_end_op;
		break;

	case 2:

		/* Load pass 2 */

		walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 |
		    ACPI_PARSE_DELETE_TREE;
		walk_state->descending_callback = acpi_ds_load2_begin_op;
		walk_state->ascending_callback = acpi_ds_load2_end_op;
		break;

	case 3:

		/* Execution pass */

#ifndef ACPI_NO_METHOD_EXECUTION
		walk_state->parse_flags |= ACPI_PARSE_EXECUTE |
		    ACPI_PARSE_DELETE_TREE;
		walk_state->descending_callback = acpi_ds_exec_begin_op;
		walk_state->ascending_callback = acpi_ds_exec_end_op;
#endif
		break;

	default:

		return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load1_begin_op
 *
 * PARAMETERS:  walk_state      - Current state of the parse tree walk
 *              out_op          - Where 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_load1_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 *path;
	u32 flags;

	ACPI_FUNCTION_TRACE(ds_load1_begin_op);

	op = walk_state->op;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
			  walk_state));

	/* We are only interested in opcodes that have an associated name */

	if (op) {
		if (!(walk_state->op_info->flags & AML_NAMED)) {
			*out_op = op;
			return_ACPI_STATUS(AE_OK);
		}

		/* Check if this object has already been installed in the namespace */

		if (op->common.node) {
			*out_op = op;
			return_ACPI_STATUS(AE_OK);
		}
	}

	path = acpi_ps_get_next_namestring(&walk_state->parser_state);

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

	object_type = walk_state->op_info->object_type;

	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
			  "State=%p Op=%p [%s]\n", walk_state, op,
			  acpi_ut_get_type_name(object_type)));

	switch (walk_state->opcode) {
	case AML_SCOPE_OP:
		/*
		 * The target name of the Scope() operator must exist at this point so
		 * that we can actually open the scope to enter new names underneath it.
		 * Allow search-to-root for single namesegs.
		 */
		status =
		    acpi_ns_lookup(walk_state->scope_info, path, object_type,
				   ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
				   walk_state, &(node));
#ifdef ACPI_ASL_COMPILER
		if (status == AE_NOT_FOUND) {
			/*
			 * Table disassembly:
			 * Target of Scope() not found. Generate an External for it, and
			 * insert the name into the namespace.
			 */
			acpi_dm_add_op_to_external_list(op, path,
							ACPI_TYPE_DEVICE, 0, 0);
			status =
			    acpi_ns_lookup(walk_state->scope_info, path,
					   object_type, ACPI_IMODE_LOAD_PASS1,
					   ACPI_NS_SEARCH_PARENT, walk_state,
					   &node);
		}
#endif
		if (ACPI_FAILURE(status)) {
			ACPI_ERROR_NAMESPACE(path, status);
			return_ACPI_STATUS(status);
		}

		/*
		 * 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) { ... }
			 *
			 * Note: silently change the type here. On the second pass,
			 * we will report a warning
			 */
			ACPI_DEBUG_PRINT((ACPI_DB_INFO,
					  "Type override - [%4.4s] had invalid type (%s) "
					  "for Scope operator, changed to type ANY\n",
					  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:
		/*
		 * For all other named opcodes, we will enter the name into
		 * the namespace.
		 *
		 * Setup the search flags.
		 * Since we are entering a name into the namespace, we do not want to
		 * enable the search-to-root upsearch.
		 *
		 * There are only two conditions where it is acceptable that the name
		 * already exists:
		 *    1) the Scope() operator can reopen a scoping object that was
		 *       previously defined (Scope, Method, Device, etc.)
		 *    2) Whenever we are parsing a deferred opcode (op_region, Buffer,
		 *       buffer_field, or Package), the name of the object is already
		 *       in the namespace.
		 */
		if (walk_state->deferred_node) {

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

			node = walk_state->deferred_node;
			status = AE_OK;
			break;
		}

		/*
		 * If we are executing a method, do not create any namespace objects
		 * during the load phase, only during execution.
		 */
		if (walk_state->method_node) {
			node = NULL;
			status = AE_OK;
			break;
		}

		flags = ACPI_NS_NO_UPSEARCH;
		if ((walk_state->opcode != AML_SCOPE_OP) &&
		    (!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
			if (walk_state->namespace_override) {
				flags |= ACPI_NS_OVERRIDE_IF_FOUND;
				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
						  "[%s] Override allowed\n",
						  acpi_ut_get_type_name
						  (object_type)));
			} else {
				flags |= ACPI_NS_ERROR_IF_FOUND;
				ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
						  "[%s] Cannot already exist\n",
						  acpi_ut_get_type_name
						  (object_type)));
			}
		} else {
			ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
					  "[%s] Both Find or Create allowed\n",
					  acpi_ut_get_type_name(object_type)));
		}

		/*
		 * 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.
		 */
		status =
		    acpi_ns_lookup(walk_state->scope_info, path, object_type,
				   ACPI_IMODE_LOAD_PASS1, flags, walk_state,
				   &node);
		if (ACPI_FAILURE(status)) {
			if (status == AE_ALREADY_EXISTS) {

				/* The name already exists in this scope */

				if (node->flags & ANOBJ_IS_EXTERNAL) {
					/*
					 * Allow one create on an object or segment that was
					 * previously declared External
					 */
					node->flags &= ~ANOBJ_IS_EXTERNAL;
					node->type = (u8) object_type;

					/* Just retyped a node, probably will need to open a scope */

					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);
						}
					}

					status = AE_OK;
				}
			}

			if (ACPI_FAILURE(status)) {
				ACPI_ERROR_NAMESPACE(path, status);
				return_ACPI_STATUS(status);
			}
		}
		break;
	}

	/* Common exit */

	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 op */

#if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
	op->named.path = ACPI_CAST_PTR(u8, path);
#endif

	if (node) {
		/*
		 * 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;
		op->named.name = node->name.integer;
	}

	acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
			   op);
	*out_op = op;
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_ds_load1_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_load1_end_op(struct acpi_walk_state *walk_state)
{
	union acpi_parse_object *op;
	acpi_object_type object_type;
	acpi_status status = AE_OK;

	ACPI_FUNCTION_TRACE(ds_load1_end_op);

	op = walk_state->op;
	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
			  walk_state));

	/* We are only interested in opcodes that have an associated name */

	if (!(walk_state->op_info->flags & (AML_NAMED | AML_FIELD))) {
		return_ACPI_STATUS(AE_OK);
	}

	/* Get the object type to determine if we should pop the scope */

	object_type = walk_state->op_info->object_type;

#ifndef ACPI_NO_METHOD_EXECUTION
	if (walk_state->op_info->flags & AML_FIELD) {
		/*
		 * If we are executing a method, do not create any namespace objects
		 * during the load phase, only during execution.
		 */
		if (!walk_state->method_node) {
			if (walk_state->opcode == AML_FIELD_OP ||
			    walk_state->opcode == AML_BANK_FIELD_OP ||
			    walk_state->opcode == AML_INDEX_FIELD_OP) {
				status =
				    acpi_ds_init_field_objects(op, walk_state);
			}
		}
		return_ACPI_STATUS(status);
	}

	/*
	 * If we are executing a method, do not create any namespace objects
	 * during the load phase, only during execution.
	 */
	if (!walk_state->method_node) {
		if (op->common.aml_opcode == AML_REGION_OP) {
			status =
			    acpi_ex_create_region(op->named.data,
						  op->named.length,
						  (acpi_adr_space_type)
						  ((op->common.value.arg)->
						   common.value.integer),
						  walk_state);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}
		} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
			status =
			    acpi_ex_create_region(op->named.data,
						  op->named.length,
						  ACPI_ADR_SPACE_DATA_TABLE,
						  walk_state);
			if (ACPI_FAILURE(status)) {
				return_ACPI_STATUS(status);
			}
		}
	}
#endif

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

		/* For Name opcode, get the object type from the argument */

		if (op->common.value.arg) {
			object_type = (acpi_ps_get_opcode_info((op->common.
								value.arg)->
							       common.
							       aml_opcode))->
			    object_type;

			/* Set node type if we have a namespace node */

			if (op->common.node) {
				op->common.node->type = (u8) object_type;
			}
		}
	}

	/*
	 * If we are executing a method, do not create any namespace objects
	 * during the load phase, only during execution.
	 */
	if (!walk_state->method_node) {
		if (op->common.aml_opcode == 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);
				}
			}
		}
	}

	/* Pop the scope stack (only if loading a table) */

	if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
		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);
	}

	return_ACPI_STATUS(status);
}
Commit	Line	Data
1da177e4 LT	1	/******************************************************************************
1da177e4 LT	2	*
9ad19ac4	3	* Module Name: dswload - Dispatcher first pass namespace load callbacks
1da177e4 LT	4	*
	5	*****************************************************************************/
	6
	7	/*
c8100dc4	8	* Copyright (C) 2000 - 2016, Intel Corp.
1da177e4 LT	9	* All rights reserved.
	10	*
	11	* Redistribution and use in source and binary forms, with or without
	12	* modification, are permitted provided that the following conditions
	13	* are met:
	14	* 1. Redistributions of source code must retain the above copyright
	15	* notice, this list of conditions, and the following disclaimer,
	16	* without modification.
	17	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
	18	* substantially similar to the "NO WARRANTY" disclaimer below
	19	* ("Disclaimer") and any redistribution must be conditioned upon
	20	* including a substantially similar Disclaimer requirement for further
	21	* binary redistribution.
	22	* 3. Neither the names of the above-listed copyright holders nor the names
	23	* of any contributors may be used to endorse or promote products derived
	24	* from this software without specific prior written permission.
	25	*
	26	* Alternatively, this software may be distributed under the terms of the
	27	* GNU General Public License ("GPL") version 2 as published by the Free
	28	* Software Foundation.
	29	*
	30	* NO WARRANTY
	31	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
	32	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
	33	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
	34	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
	35	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	36	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	37	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	38	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	39	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
	40	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
	41	* POSSIBILITY OF SUCH DAMAGES.
	42	*/
	43
1da177e4	44	#include <acpi/acpi.h>
e2f7a777 LB	45	#include "accommon.h"
	46	#include "acparser.h"
	47	#include "amlcode.h"
	48	#include "acdispat.h"
	49	#include "acinterp.h"
	50	#include "acnamesp.h"
1da177e4	51
73459f73	52	#ifdef ACPI_ASL_COMPILER
56324c10	53	#include "acdisasm.h"
1da177e4 LT	54	#endif
	55
	56	#define _COMPONENT ACPI_DISPATCHER
4be44fcd	57	ACPI_MODULE_NAME("dswload")
1da177e4 LT	58
	59	/*******************************************************************************
	60	*
	61	* FUNCTION: acpi_ds_init_callbacks
	62	*
	63	* PARAMETERS: walk_state - Current state of the parse tree walk
	64	* pass_number - 1, 2, or 3
	65	*
	66	* RETURN: Status
	67	*
	68	* DESCRIPTION: Init walk state callbacks
	69	*
	70	******************************************************************************/
1da177e4	71	acpi_status
4be44fcd	72	acpi_ds_init_callbacks(struct acpi_walk_state *walk_state, u32 pass_number)
1da177e4 LT	73	{
	74
	75	switch (pass_number) {
22b5afce BM	76	case 0:
	77
	78	/* Parse only - caller will setup callbacks */
	79
	80	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
	81	ACPI_PARSE_DELETE_TREE \| ACPI_PARSE_DISASSEMBLE;
	82	walk_state->descending_callback = NULL;
	83	walk_state->ascending_callback = NULL;
	84	break;
	85
1da177e4	86	case 1:
1d1ea1b7	87
22b5afce BM	88	/* Load pass 1 */
22b5afce BM	89
4be44fcd LB	90	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
4be44fcd LB	91	ACPI_PARSE_DELETE_TREE;
1da177e4 LT	92	walk_state->descending_callback = acpi_ds_load1_begin_op;
	93	walk_state->ascending_callback = acpi_ds_load1_end_op;
	94	break;
	95
	96	case 2:
1d1ea1b7	97
22b5afce BM	98	/* Load pass 2 */
22b5afce BM	99
4be44fcd LB	100	walk_state->parse_flags = ACPI_PARSE_LOAD_PASS1 \|
4be44fcd LB	101	ACPI_PARSE_DELETE_TREE;
1da177e4 LT	102	walk_state->descending_callback = acpi_ds_load2_begin_op;
	103	walk_state->ascending_callback = acpi_ds_load2_end_op;
	104	break;
	105
	106	case 3:
1d1ea1b7	107
22b5afce BM	108	/* Execution pass */
22b5afce BM	109
1da177e4	110	#ifndef ACPI_NO_METHOD_EXECUTION
4be44fcd LB	111	walk_state->parse_flags \|= ACPI_PARSE_EXECUTE \|
4be44fcd LB	112	ACPI_PARSE_DELETE_TREE;
1da177e4 LT	113	walk_state->descending_callback = acpi_ds_exec_begin_op;
	114	walk_state->ascending_callback = acpi_ds_exec_end_op;
	115	#endif
	116	break;
	117
	118	default:
1d1ea1b7	119
1da177e4 LT	120	return (AE_BAD_PARAMETER);
	121	}
	122
	123	return (AE_OK);
	124	}
	125
1da177e4 LT	126	/*******************************************************************************
	127	*
	128	* FUNCTION: acpi_ds_load1_begin_op
	129	*
	130	* PARAMETERS: walk_state - Current state of the parse tree walk
44f6c012	131	* out_op - Where to return op if a new one is created
1da177e4 LT	132	*
	133	* RETURN: Status
	134	*
	135	* DESCRIPTION: Descending callback used during the loading of ACPI tables.
	136	*
	137	******************************************************************************/
	138
	139	acpi_status
f5c1e1c5 LZ	140	acpi_ds_load1_begin_op(struct acpi_walk_state *walk_state,
f5c1e1c5 LZ	141	union acpi_parse_object **out_op)
1da177e4	142	{
4be44fcd LB	143	union acpi_parse_object *op;
	144	struct acpi_namespace_node *node;
	145	acpi_status status;
	146	acpi_object_type object_type;
	147	char *path;
	148	u32 flags;
1da177e4	149
b229cf92	150	ACPI_FUNCTION_TRACE(ds_load1_begin_op);
1da177e4 LT	151
1da177e4 LT	152	op = walk_state->op;
4be44fcd LB	153	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
4be44fcd LB	154	walk_state));
1da177e4 LT	155
	156	/* We are only interested in opcodes that have an associated name */
	157
	158	if (op) {
	159	if (!(walk_state->op_info->flags & AML_NAMED)) {
1da177e4	160	*out_op = op;
28f55ebc	161	return_ACPI_STATUS(AE_OK);
1da177e4 LT	162	}
	163
	164	/* Check if this object has already been installed in the namespace */
	165
	166	if (op->common.node) {
	167	*out_op = op;
28f55ebc	168	return_ACPI_STATUS(AE_OK);
1da177e4 LT	169	}
	170	}
	171
4be44fcd	172	path = acpi_ps_get_next_namestring(&walk_state->parser_state);
1da177e4 LT	173
	174	/* Map the raw opcode into an internal object type */
	175
	176	object_type = walk_state->op_info->object_type;
	177
4be44fcd LB	178	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	179	"State=%p Op=%p [%s]\n", walk_state, op,
	180	acpi_ut_get_type_name(object_type)));
1da177e4 LT	181
	182	switch (walk_state->opcode) {
	183	case AML_SCOPE_OP:
1da177e4 LT	184	/*
	185	* The target name of the Scope() operator must exist at this point so
	186	* that we can actually open the scope to enter new names underneath it.
	187	* Allow search-to-root for single namesegs.
	188	*/
4be44fcd LB	189	status =
	190	acpi_ns_lookup(walk_state->scope_info, path, object_type,
	191	ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
	192	walk_state, &(node));
73459f73	193	#ifdef ACPI_ASL_COMPILER
1da177e4 LT	194	if (status == AE_NOT_FOUND) {
	195	/*
	196	* Table disassembly:
967440e3	197	* Target of Scope() not found. Generate an External for it, and
1da177e4 LT	198	* insert the name into the namespace.
1da177e4 LT	199	*/
5af2b635 BM	200	acpi_dm_add_op_to_external_list(op, path,
5af2b635 BM	201	ACPI_TYPE_DEVICE, 0, 0);
4be44fcd LB	202	status =
	203	acpi_ns_lookup(walk_state->scope_info, path,
	204	object_type, ACPI_IMODE_LOAD_PASS1,
	205	ACPI_NS_SEARCH_PARENT, walk_state,
958dd242	206	&node);
1da177e4 LT	207	}
1da177e4 LT	208	#endif
4be44fcd	209	if (ACPI_FAILURE(status)) {
b8e4d893	210	ACPI_ERROR_NAMESPACE(path, status);
28f55ebc	211	return_ACPI_STATUS(status);
1da177e4 LT	212	}
	213
	214	/*
	215	* Check to make sure that the target is
	216	* one of the opcodes that actually opens a scope
	217	*/
	218	switch (node->type) {
15f0c0d1	219	case ACPI_TYPE_ANY:
4be44fcd	220	case ACPI_TYPE_LOCAL_SCOPE: /* Scope */
1da177e4 LT	221	case ACPI_TYPE_DEVICE:
	222	case ACPI_TYPE_POWER:
	223	case ACPI_TYPE_PROCESSOR:
	224	case ACPI_TYPE_THERMAL:
	225
	226	/* These are acceptable types */
	227	break;
	228
	229	case ACPI_TYPE_INTEGER:
	230	case ACPI_TYPE_STRING:
	231	case ACPI_TYPE_BUFFER:
1da177e4	232	/*
f2cb1251 BM	233	* These types we will allow, but we will change the type.
f2cb1251 BM	234	* This enables some existing code of the form:
1da177e4 LT	235	*
	236	* Name (DEB, 0)
	237	* Scope (DEB) { ... }
	238	*
f2cb1251 BM	239	* Note: silently change the type here. On the second pass,
f2cb1251 BM	240	* we will report a warning
1da177e4	241	*/
4be44fcd	242	ACPI_DEBUG_PRINT((ACPI_DB_INFO,
f2cb1251 BM	243	"Type override - [%4.4s] had invalid type (%s) "
	244	"for Scope operator, changed to type ANY\n",
	245	acpi_ut_get_node_name(node),
4be44fcd	246	acpi_ut_get_type_name(node->type)));
1da177e4 LT	247
	248	node->type = ACPI_TYPE_ANY;
	249	walk_state->scope_info->common.value = ACPI_TYPE_ANY;
	250	break;
	251
28f538b5	252	case ACPI_TYPE_METHOD:
28f538b5 BM	253	/*
	254	* Allow scope change to root during execution of module-level
	255	* code. Root is typed METHOD during this time.
	256	*/
	257	if ((node == acpi_gbl_root_node) &&
	258	(walk_state->
	259	parse_flags & ACPI_PARSE_MODULE_LEVEL)) {
	260	break;
	261	}
	262
	263	/lint -fallthrough /
	264
1da177e4 LT	265	default:
	266
	267	/* All other types are an error */
	268
b8e4d893	269	ACPI_ERROR((AE_INFO,
f2cb1251 BM	270	"Invalid type (%s) for target of "
	271	"Scope operator [%4.4s] (Cannot override)",
	272	acpi_ut_get_type_name(node->type),
	273	acpi_ut_get_node_name(node)));
1da177e4	274
28f55ebc	275	return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
1da177e4 LT	276	}
	277	break;
	278
1da177e4	279	default:
1da177e4	280	/*
44f6c012 RM	281	* For all other named opcodes, we will enter the name into
44f6c012 RM	282	* the namespace.
1da177e4 LT	283	*
	284	* Setup the search flags.
	285	* Since we are entering a name into the namespace, we do not want to
	286	* enable the search-to-root upsearch.
	287	*
	288	* There are only two conditions where it is acceptable that the name
	289	* already exists:
	290	* 1) the Scope() operator can reopen a scoping object that was
	291	* previously defined (Scope, Method, Device, etc.)
	292	* 2) Whenever we are parsing a deferred opcode (op_region, Buffer,
	293	* buffer_field, or Package), the name of the object is already
	294	* in the namespace.
	295	*/
	296	if (walk_state->deferred_node) {
52fc0b02	297
1da177e4 LT	298	/* This name is already in the namespace, get the node */
	299
	300	node = walk_state->deferred_node;
	301	status = AE_OK;
	302	break;
	303	}
	304
28f55ebc BM	305	/*
	306	* If we are executing a method, do not create any namespace objects
	307	* during the load phase, only during execution.
	308	*/
	309	if (walk_state->method_node) {
	310	node = NULL;
	311	status = AE_OK;
	312	break;
	313	}
	314
1da177e4 LT	315	flags = ACPI_NS_NO_UPSEARCH;
1da177e4 LT	316	if ((walk_state->opcode != AML_SCOPE_OP) &&
4be44fcd	317	(!(walk_state->parse_flags & ACPI_PARSE_DEFERRED_OP))) {
8f6f0361 LZ	318	if (walk_state->namespace_override) {
	319	flags \|= ACPI_NS_OVERRIDE_IF_FOUND;
	320	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	321	"[%s] Override allowed\n",
	322	acpi_ut_get_type_name
	323	(object_type)));
	324	} else {
	325	flags \|= ACPI_NS_ERROR_IF_FOUND;
	326	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	327	"[%s] Cannot already exist\n",
	328	acpi_ut_get_type_name
	329	(object_type)));
	330	}
4be44fcd LB	331	} else {
	332	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	333	"[%s] Both Find or Create allowed\n",
	334	acpi_ut_get_type_name(object_type)));
1da177e4 LT	335	}
	336
	337	/*
967440e3 BM	338	* Enter the named type into the internal namespace. We enter the name
967440e3 BM	339	* as we go downward in the parse tree. Any necessary subobjects that
44f6c012 RM	340	* involve arguments to the opcode must be created as we go back up the
44f6c012 RM	341	* parse tree later.
1da177e4	342	*/
4be44fcd LB	343	status =
	344	acpi_ns_lookup(walk_state->scope_info, path, object_type,
	345	ACPI_IMODE_LOAD_PASS1, flags, walk_state,
958dd242	346	&node);
4be44fcd	347	if (ACPI_FAILURE(status)) {
958dd242 BM	348	if (status == AE_ALREADY_EXISTS) {
	349
	350	/* The name already exists in this scope */
	351
	352	if (node->flags & ANOBJ_IS_EXTERNAL) {
	353	/*
	354	* Allow one create on an object or segment that was
	355	* previously declared External
	356	*/
	357	node->flags &= ~ANOBJ_IS_EXTERNAL;
	358	node->type = (u8) object_type;
	359
	360	/* Just retyped a node, probably will need to open a scope */
	361
	362	if (acpi_ns_opens_scope(object_type)) {
	363	status =
	364	acpi_ds_scope_stack_push
	365	(node, object_type,
	366	walk_state);
	367	if (ACPI_FAILURE(status)) {
	368	return_ACPI_STATUS
	369	(status);
	370	}
	371	}
967440e3	372
958dd242 BM	373	status = AE_OK;
	374	}
	375	}
	376
	377	if (ACPI_FAILURE(status)) {
958dd242 BM	378	ACPI_ERROR_NAMESPACE(path, status);
	379	return_ACPI_STATUS(status);
	380	}
1da177e4 LT	381	}
	382	break;
	383	}
	384
1da177e4 LT	385	/* Common exit */
	386
	387	if (!op) {
52fc0b02	388
1da177e4 LT	389	/* Create a new op */
1da177e4 LT	390
62eb935b	391	op = acpi_ps_alloc_op(walk_state->opcode, walk_state->aml);
1da177e4	392	if (!op) {
28f55ebc	393	return_ACPI_STATUS(AE_NO_MEMORY);
1da177e4 LT	394	}
	395	}
	396
28f55ebc	397	/* Initialize the op */
1da177e4 LT	398
1da177e4 LT	399	#if (defined (ACPI_NO_METHOD_EXECUTION) \|\| defined (ACPI_CONSTANT_EVAL_ONLY))
c51a4de8	400	op->named.path = ACPI_CAST_PTR(u8, path);
1da177e4 LT	401	#endif
1da177e4 LT	402
28f55ebc BM	403	if (node) {
	404	/*
	405	* Put the Node in the "op" object that the parser uses, so we
	406	* can get it again quickly when this scope is closed
	407	*/
	408	op->common.node = node;
	409	op->named.name = node->name.integer;
	410	}
	411
4be44fcd LB	412	acpi_ps_append_arg(acpi_ps_get_parent_scope(&walk_state->parser_state),
4be44fcd LB	413	op);
1da177e4	414	*out_op = op;
28f55ebc	415	return_ACPI_STATUS(status);
1da177e4 LT	416	}
1da177e4 LT	417
1da177e4 LT	418	/*******************************************************************************
	419	*
	420	* FUNCTION: acpi_ds_load1_end_op
	421	*
	422	* PARAMETERS: walk_state - Current state of the parse tree walk
1da177e4 LT	423	*
	424	* RETURN: Status
	425	*
	426	* DESCRIPTION: Ascending callback used during the loading of the namespace,
	427	* both control methods and everything else.
	428	*
	429	******************************************************************************/
	430
28f55ebc	431	acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state)
1da177e4	432	{
4be44fcd LB	433	union acpi_parse_object *op;
	434	acpi_object_type object_type;
	435	acpi_status status = AE_OK;
1da177e4	436
b229cf92	437	ACPI_FUNCTION_TRACE(ds_load1_end_op);
1da177e4 LT	438
1da177e4 LT	439	op = walk_state->op;
4be44fcd LB	440	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH, "Op=%p State=%p\n", op,
4be44fcd LB	441	walk_state));
1da177e4 LT	442
	443	/* We are only interested in opcodes that have an associated name */
	444
	445	if (!(walk_state->op_info->flags & (AML_NAMED \| AML_FIELD))) {
28f55ebc	446	return_ACPI_STATUS(AE_OK);
1da177e4 LT	447	}
	448
	449	/* Get the object type to determine if we should pop the scope */
	450
	451	object_type = walk_state->op_info->object_type;
	452
	453	#ifndef ACPI_NO_METHOD_EXECUTION
	454	if (walk_state->op_info->flags & AML_FIELD) {
28f55ebc BM	455	/*
	456	* If we are executing a method, do not create any namespace objects
	457	* during the load phase, only during execution.
	458	*/
	459	if (!walk_state->method_node) {
	460	if (walk_state->opcode == AML_FIELD_OP \|\|
	461	walk_state->opcode == AML_BANK_FIELD_OP \|\|
	462	walk_state->opcode == AML_INDEX_FIELD_OP) {
	463	status =
	464	acpi_ds_init_field_objects(op, walk_state);
	465	}
1da177e4	466	}
28f55ebc	467	return_ACPI_STATUS(status);
1da177e4 LT	468	}
1da177e4 LT	469
28f55ebc BM	470	/*
	471	* If we are executing a method, do not create any namespace objects
	472	* during the load phase, only during execution.
	473	*/
	474	if (!walk_state->method_node) {
	475	if (op->common.aml_opcode == AML_REGION_OP) {
	476	status =
	477	acpi_ex_create_region(op->named.data,
	478	op->named.length,
1fad8738 BM	479	(acpi_adr_space_type)
	480	((op->common.value.arg)->
	481	common.value.integer),
28f55ebc BM	482	walk_state);
	483	if (ACPI_FAILURE(status)) {
	484	return_ACPI_STATUS(status);
	485	}
941f48bb LM	486	} else if (op->common.aml_opcode == AML_DATA_REGION_OP) {
	487	status =
	488	acpi_ex_create_region(op->named.data,
	489	op->named.length,
82a1b7cb	490	ACPI_ADR_SPACE_DATA_TABLE,
941f48bb LM	491	walk_state);
	492	if (ACPI_FAILURE(status)) {
	493	return_ACPI_STATUS(status);
	494	}
1da177e4 LT	495	}
	496	}
	497	#endif
	498
	499	if (op->common.aml_opcode == AML_NAME_OP) {
52fc0b02	500
1da177e4 LT	501	/* For Name opcode, get the object type from the argument */
	502
	503	if (op->common.value.arg) {
4be44fcd LB	504	object_type = (acpi_ps_get_opcode_info((op->common.
	505	value.arg)->
	506	common.
	507	aml_opcode))->
	508	object_type;
28f55ebc BM	509
	510	/* Set node type if we have a namespace node */
	511
	512	if (op->common.node) {
	513	op->common.node->type = (u8) object_type;
	514	}
1da177e4 LT	515	}
	516	}
	517
defba1d8 BM	518	/*
	519	* If we are executing a method, do not create any namespace objects
	520	* during the load phase, only during execution.
	521	*/
	522	if (!walk_state->method_node) {
	523	if (op->common.aml_opcode == AML_METHOD_OP) {
	524	/*
	525	* method_op pkg_length name_string method_flags term_list
	526	*
	527	* Note: We must create the method node/object pair as soon as we
967440e3	528	* see the method declaration. This allows later pass1 parsing
defba1d8 BM	529	* of invocations of the method (need to know the number of
	530	* arguments.)
	531	*/
	532	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
b229cf92	533	"LOADING-Method: State=%p Op=%p NamedObj=%p\n",
defba1d8	534	walk_state, op, op->named.node));
1da177e4	535
defba1d8 BM	536	if (!acpi_ns_get_attached_object(op->named.node)) {
	537	walk_state->operands[0] =
	538	ACPI_CAST_PTR(void, op->named.node);
	539	walk_state->num_operands = 1;
1da177e4	540
defba1d8 BM	541	status =
	542	acpi_ds_create_operands(walk_state,
	543	op->common.value.
	544	arg);
	545	if (ACPI_SUCCESS(status)) {
	546	status =
	547	acpi_ex_create_method(op->named.
	548	data,
	549	op->named.
	550	length,
	551	walk_state);
	552	}
967440e3	553
defba1d8 BM	554	walk_state->operands[0] = NULL;
defba1d8 BM	555	walk_state->num_operands = 0;
1da177e4	556
defba1d8 BM	557	if (ACPI_FAILURE(status)) {
	558	return_ACPI_STATUS(status);
	559	}
1da177e4 LT	560	}
	561	}
	562	}
	563
defba1d8	564	/* Pop the scope stack (only if loading a table) */
1da177e4	565
defba1d8	566	if (!walk_state->method_node && acpi_ns_opens_scope(object_type)) {
4be44fcd LB	567	ACPI_DEBUG_PRINT((ACPI_DB_DISPATCH,
	568	"(%s): Popping scope for Op %p\n",
	569	acpi_ut_get_type_name(object_type), op));
1da177e4	570
4be44fcd	571	status = acpi_ds_scope_stack_pop(walk_state);
1da177e4 LT	572	}
1da177e4 LT	573
28f55ebc	574	return_ACPI_STATUS(status);
1da177e4	575	}