dsobject.c

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/******************************************************************************
 *
 * Module Name: dsobject - Dispatcher object management routines
 *              $Revision: 91 $
 *
 *****************************************************************************/

/*
 *  Copyright (C) 2000 - 2002, R. Byron Moore
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */


#include "acpi.h"
#include "acparser.h"
#include "amlcode.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"

#define _COMPONENT          ACPI_DISPATCHER
	 ACPI_MODULE_NAME    ("dsobject")


/*******************************************************************************
 *
 * FUNCTION:    Acpi_ds_init_one_object
 *
 * PARAMETERS:  Obj_handle      - Node
 *              Level           - Current nesting level
 *              Context         - Points to a init info struct
 *              Return_value    - Not used
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Callback from Acpi_walk_namespace. Invoked for every object
 *              within the namespace.
 *
 *              Currently, the only objects that require initialization are:
 *              1) Methods
 *              2) Operation Regions
 *
 ******************************************************************************/

acpi_status
acpi_ds_init_one_object (
	acpi_handle             obj_handle,
	u32                     level,
	void                    *context,
	void                    **return_value)
{
	acpi_object_type        type;
	acpi_status             status;
	acpi_init_walk_info     *info = (acpi_init_walk_info *) context;
	u8                      table_revision;


	ACPI_FUNCTION_NAME ("Ds_init_one_object");


	info->object_count++;
	table_revision = info->table_desc->pointer->revision;

	/*
	 * We are only interested in objects owned by the table that
	 * was just loaded
	 */
	if (((acpi_namespace_node *) obj_handle)->owner_id !=
			info->table_desc->table_id) {
		return (AE_OK);
	}

	/* And even then, we are only interested in a few object types */

	type = acpi_ns_get_type (obj_handle);

	switch (type) {
	case ACPI_TYPE_REGION:

		acpi_ds_initialize_region (obj_handle);

		info->op_region_count++;
		break;


	case ACPI_TYPE_METHOD:

		info->method_count++;

		if (!(acpi_dbg_level & ACPI_LV_INIT)) {
			ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "."));
		}

		/*
		 * Set the execution data width (32 or 64) based upon the
		 * revision number of the parent ACPI table.
		 */
		if (table_revision == 1) {
			((acpi_namespace_node *)obj_handle)->flags |= ANOBJ_DATA_WIDTH_32;
		}

		/*
		 * Always parse methods to detect errors, we may delete
		 * the parse tree below
		 */
		status = acpi_ds_parse_method (obj_handle);
		if (ACPI_FAILURE (status)) {
			ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Method %p [%4.4s] - parse failure, %s\n",
				obj_handle, (char *) &((acpi_namespace_node *) obj_handle)->name,
				acpi_format_exception (status)));

			/* This parse failed, but we will continue parsing more methods */

			break;
		}

		/*
		 * Delete the parse tree.  We simple re-parse the method
		 * for every execution since there isn't much overhead
		 */
		acpi_ns_delete_namespace_subtree (obj_handle);
		acpi_ns_delete_namespace_by_owner (((acpi_namespace_node *) obj_handle)->object->method.owning_id);
		break;

	default:
		break;
	}

	/*
	 * We ignore errors from above, and always return OK, since
	 * we don't want to abort the walk on a single error.
	 */
	return (AE_OK);
}


/*******************************************************************************
 *
 * FUNCTION:    Acpi_ds_initialize_objects
 *
 * PARAMETERS:  Table_desc      - Descriptor for parent ACPI table
 *              Start_node      - Root of subtree to be initialized.
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Walk the namespace starting at "Start_node" and perform any
 *              necessary initialization on the objects found therein
 *
 ******************************************************************************/

acpi_status
acpi_ds_initialize_objects (
	acpi_table_desc         *table_desc,
	acpi_namespace_node     *start_node)
{
	acpi_status             status;
	acpi_init_walk_info     info;


	ACPI_FUNCTION_TRACE ("Ds_initialize_objects");


	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
		"**** Starting initialization of namespace objects ****\n"));
	ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK, "Parsing Methods:"));


	info.method_count   = 0;
	info.op_region_count = 0;
	info.object_count   = 0;
	info.table_desc     = table_desc;

	/* Walk entire namespace from the supplied root */

	status = acpi_walk_namespace (ACPI_TYPE_ANY, start_node, ACPI_UINT32_MAX,
			  acpi_ds_init_one_object, &info, NULL);
	if (ACPI_FAILURE (status)) {
		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Walk_namespace failed! %x\n", status));
	}

	ACPI_DEBUG_PRINT_RAW ((ACPI_DB_OK,
		"\n%d Control Methods found and parsed (%d nodes total)\n",
		info.method_count, info.object_count));
	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
		"%d Control Methods found\n", info.method_count));
	ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
		"%d Op Regions found\n", info.op_region_count));

	return_ACPI_STATUS (AE_OK);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_init_object_from_op
 *
 * PARAMETERS:  Walk_state      - Current walk state
 *              Op              - Parser op used to init the internal object
 *              Opcode          - AML opcode associated with the object
 *              Ret_obj_desc    - Namespace object to be initialized
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Initialize a namespace object from a parser Op and its
 *              associated arguments.  The namespace object is a more compact
 *              representation of the Op and its arguments.
 *
 ****************************************************************************/

acpi_status
acpi_ds_init_object_from_op (
	acpi_walk_state         *walk_state,
	acpi_parse_object       *op,
	u16                     opcode,
	acpi_operand_object     **ret_obj_desc)
{
	const acpi_opcode_info  *op_info;
	acpi_operand_object     *obj_desc;


	ACPI_FUNCTION_NAME ("Ds_init_object_from_op");


	obj_desc = *ret_obj_desc;
	op_info = acpi_ps_get_opcode_info (opcode);
	if (op_info->class == AML_CLASS_UNKNOWN) {
		/* Unknown opcode */

		return (AE_TYPE);
	}

	/* Perform per-object initialization */

	switch (obj_desc->common.type) {
	case ACPI_TYPE_BUFFER:

		/*
		 * Defer evaluation of Buffer Term_arg operand
		 */
		obj_desc->buffer.node     = (acpi_namespace_node *) walk_state->operands[0];
		obj_desc->buffer.aml_start = ((acpi_parse2_object *) op)->data;
		obj_desc->buffer.aml_length = ((acpi_parse2_object *) op)->length;
		break;


	case ACPI_TYPE_PACKAGE:

		/*
		 * Defer evaluation of Package Term_arg operand
		 */
		obj_desc->package.node     = (acpi_namespace_node *) walk_state->operands[0];
		obj_desc->package.aml_start = ((acpi_parse2_object *) op)->data;
		obj_desc->package.aml_length = ((acpi_parse2_object *) op)->length;
		break;


	case ACPI_TYPE_INTEGER:

		obj_desc->integer.value = op->value.integer;
		break;


	case ACPI_TYPE_STRING:

		obj_desc->string.pointer = op->value.string;
		obj_desc->string.length = ACPI_STRLEN (op->value.string);

		/*
		 * The string is contained in the ACPI table, don't ever try
		 * to delete it
		 */
		obj_desc->common.flags |= AOPOBJ_STATIC_POINTER;
		break;


	case ACPI_TYPE_METHOD:
		break;


	case INTERNAL_TYPE_REFERENCE:

		switch (op_info->type) {
		case AML_TYPE_LOCAL_VARIABLE:

			/* Split the opcode into a base opcode + offset */

			obj_desc->reference.opcode = AML_LOCAL_OP;
			obj_desc->reference.offset = opcode - AML_LOCAL_OP;
			break;


		case AML_TYPE_METHOD_ARGUMENT:

			/* Split the opcode into a base opcode + offset */

			obj_desc->reference.opcode = AML_ARG_OP;
			obj_desc->reference.offset = opcode - AML_ARG_OP;
			break;


		default: /* Constants, Literals, etc.. */

			if (op->opcode == AML_INT_NAMEPATH_OP) {
				/* Node was saved in Op */

				obj_desc->reference.node = op->node;
			}

			obj_desc->reference.opcode = opcode;
			break;
		}
		break;


	default:

		ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unimplemented data type: %x\n",
			obj_desc->common.type));

		break;
	}

	return (AE_OK);
}


/*****************************************************************************
 *
 * FUNCTION:    Acpi_ds_build_internal_object
 *
 * PARAMETERS:  Walk_state      - Current walk state
 *              Op              - Parser object to be translated
 *              Obj_desc_ptr    - Where the ACPI internal object is returned
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object
 *              Simple objects are any objects other than a package object!
 *
 ****************************************************************************/

acpi_status