/******************************************************************************
 *
 * Name: acstruct.h - Internal structs
 *       $Revision: 19 $
 *
 *****************************************************************************/

/*
 *  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
 */

#ifndef __ACSTRUCT_H__
#define __ACSTRUCT_H__


/*****************************************************************************
 *
 * Tree walking typedefs and structs
 *
 ****************************************************************************/


/*
 * Walk state - current state of a parse tree walk.  Used for both a leisurely stroll through
 * the tree (for whatever reason), and for control method execution.
 */

#define ACPI_NEXT_OP_DOWNWARD       1
#define ACPI_NEXT_OP_UPWARD         2

#define ACPI_WALK_NON_METHOD        0
#define ACPI_WALK_METHOD            1
#define ACPI_WALK_METHOD_RESTART    2
#define ACPI_WALK_CONST_REQUIRED    3
#define ACPI_WALK_CONST_OPTIONAL    4

typedef struct acpi_walk_state
{
	u8                      data_type;                          /* To differentiate various internal objs MUST BE FIRST!*/\
	acpi_owner_id           owner_id;                           /* Owner of objects created during the walk */
	u8                      last_predicate;                     /* Result of last predicate */
	u8                      current_result;                     /* */
	u8                      next_op_info;                       /* Info about Next_op */
	u8                      num_operands;                       /* Stack pointer for Operands[] array */
	u8                      return_used;
	u8                      walk_type;
	u16                     opcode;                             /* Current AML opcode */
	u32                     arg_count;                          /* push for fixed or var args */
	u32                     aml_offset;
	u32                     arg_types;
	u32                     method_breakpoint;                  /* For single stepping */
	u32                     user_breakpoint;                    /* User AML breakpoint */
	u32                     parse_flags;
	u32                     prev_arg_types;


	u8                      *aml_last_while;
	struct acpi_node        arguments[MTH_NUM_ARGS];            /* Control method arguments */
	union acpi_operand_obj  **caller_return_desc;
	acpi_generic_state      *control_state;                     /* List of control states (nested IFs) */
	struct acpi_node        local_variables[MTH_NUM_LOCALS];    /* Control method locals */
	struct acpi_node        *method_call_node;                  /* Called method Node*/
	acpi_parse_object       *method_call_op;                    /* Method_call Op if running a method */
	union acpi_operand_obj  *method_desc;                       /* Method descriptor if running a method */
	struct acpi_node        *method_node;                       /* Method Node if running a method */
	acpi_parse_object       *op;                                /* Current parser op */
	union acpi_operand_obj  *operands[OBJ_NUM_OPERANDS+1];      /* Operands passed to the interpreter (+1 for NULL terminator) */
	const acpi_opcode_info  *op_info;                           /* Info on current opcode */
	acpi_parse_object       *origin;                            /* Start of walk [Obsolete] */
	union acpi_operand_obj  **params;
	acpi_parse_state        parser_state;                       /* Current state of parser */
	union acpi_operand_obj  *result_obj;
	acpi_generic_state      *results;                           /* Stack of accumulated results */
	union acpi_operand_obj  *return_desc;                       /* Return object, if any */
	acpi_generic_state      *scope_info;                        /* Stack of nested scopes */

	acpi_parse_object       *prev_op;                           /* Last op that was processed */
	acpi_parse_object       *next_op;                           /* next op to be processed */
	acpi_parse_downwards    descending_callback;
	acpi_parse_upwards      ascending_callback;
	ACPI_THREAD_STATE       *thread;
	struct acpi_walk_state  *next;                              /* Next Walk_state in list */


} acpi_walk_state;


/* Info used by Acpi_ps_init_objects */

typedef struct acpi_init_walk_info
{
	u16                     method_count;
	u16                     device_count;
	u16                     op_region_count;
	u16                     field_count;
	u16                     buffer_count;
	u16                     package_count;
	u16                     op_region_init;
	u16                     field_init;
	u16                     buffer_init;
	u16                     package_init;
	u16                     object_count;
	acpi_table_desc         *table_desc;

} acpi_init_walk_info;


/* Info used by Acpi_ns_initialize_devices */

typedef struct acpi_device_walk_info
{
	u16                     device_count;
	u16                     num_STA;
	u16                     num_INI;
	acpi_table_desc         *table_desc;

} acpi_device_walk_info;


/* TBD: [Restructure] Merge with struct above */

typedef struct acpi_walk_info
{
	u32                     debug_level;
	u32                     owner_id;
	u8                      display_type;

} acpi_walk_info;

/* Display Types */

#define ACPI_DISPLAY_SUMMARY    0
#define ACPI_DISPLAY_OBJECTS    1

typedef struct acpi_get_devices_info
{
	acpi_walk_callback      user_function;
	void                    *context;
	NATIVE_CHAR             *hid;

} acpi_get_devices_info;


typedef union acpi_aml_operands
{
	acpi_operand_object         *operands[7];

	struct
	{
		ACPI_OBJECT_INTEGER     *type;
		ACPI_OBJECT_INTEGER     *code;
		ACPI_OBJECT_INTEGER     *argument;

	} fatal;

	struct
	{
		acpi_operand_object     *source;
		ACPI_OBJECT_INTEGER     *index;
		acpi_operand_object     *target;

	} index;

	struct
	{
		acpi_operand_object     *source;
		ACPI_OBJECT_INTEGER     *index;
		ACPI_OBJECT_INTEGER     *length;
		acpi_operand_object     *target;

	} mid;

} ACPI_AML_OPERANDS;


#endif
