text: 
  /******************************************************************************
   *
   * Name: acobject.h - Definition of union acpi_operand_object  (Internal object only)
   *
   *****************************************************************************/
  
  /*
   * Copyright (C) 2000 - 2010, 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.
   */
  
  #ifndef _ACOBJECT_H
  #define _ACOBJECT_H
  
  /* acpisrc:struct_defs -- for acpisrc conversion */
  
  /*
   * The union acpi_operand_object is used to pass AML operands from the dispatcher
   * to the interpreter, and to keep track of the various handlers such as
   * address space handlers and notify handlers. The object is a constant
   * size in order to allow it to be cached and reused.
   *
   * Note: The object is optimized to be aligned and will not work if it is
   * byte-packed.
   */
  #if ACPI_MACHINE_WIDTH == 64
  #pragma pack(8)
  #else
  #pragma pack(4)
  #endif
  
  /*******************************************************************************
   *
   * Common Descriptors
   *
   ******************************************************************************/
  
  /*
   * Common area for all objects.
   *
   * descriptor_type is used to differentiate between internal descriptors, and
   * must be in the same place across all descriptors
   *
   * Note: The descriptor_type and Type fields must appear in the identical
   * position in both the struct acpi_namespace_node and union acpi_operand_object
   * structures.
   */
  #define ACPI_OBJECT_COMMON_HEADER \
  	union acpi_operand_object       *next_object;       /* Objects linked to parent NS node */\
  	u8                              descriptor_type;    /* To differentiate various internal objs */\
  	u8                              type;               /* acpi_object_type */\
  	u16                             reference_count;    /* For object deletion management */\
  	u8                              flags;
  	/*
  	 * Note: There are 3 bytes available here before the
  	 * next natural alignment boundary (for both 32/64 cases)
  	 */
  
  /* Values for Flag byte above */
  
  #define AOPOBJ_AML_CONSTANT         0x01
  #define AOPOBJ_STATIC_POINTER       0x02
  #define AOPOBJ_DATA_VALID           0x04
  #define AOPOBJ_OBJECT_INITIALIZED   0x08
  #define AOPOBJ_SETUP_COMPLETE       0x10
  #define AOPOBJ_SINGLE_DATUM         0x20
  #define AOPOBJ_INVALID              0x40	/* Used if host OS won't allow an op_region address */
  #define AOPOBJ_MODULE_LEVEL         0x80
  
  /******************************************************************************
   *
   * Basic data types
   *
   *****************************************************************************/
  
  struct acpi_object_common {
  ACPI_OBJECT_COMMON_HEADER};
  
  struct acpi_object_integer {
  	ACPI_OBJECT_COMMON_HEADER u8 fill[3];	/* Prevent warning on some compilers */
  	u64 value;
  };
  
  /*
   * Note: The String and Buffer object must be identical through the Pointer
   * and length elements.  There is code that depends on this.
   *
   * Fields common to both Strings and Buffers
   */
  #define ACPI_COMMON_BUFFER_INFO(_type) \
  	_type                           *pointer; \
  	u32                             length;
  
  struct acpi_object_string {	/* Null terminated, ASCII characters only */
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(char)	/* String in AML stream or allocated string */
  };
  
  struct acpi_object_buffer {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_BUFFER_INFO(u8)	/* Buffer in AML stream or allocated buffer */
  	u32 aml_length;
  	u8 *aml_start;
  	struct acpi_namespace_node *node;	/* Link back to parent node */
  };
  
  struct acpi_object_package {
  	ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;	/* Link back to parent node */
  	union acpi_operand_object **elements;	/* Array of pointers to acpi_objects */
  	u8 *aml_start;
  	u32 aml_length;
  	u32 count;		/* # of elements in package */
  };
  
  /******************************************************************************
   *
   * Complex data types
   *
   *****************************************************************************/
  
  struct acpi_object_event {
  	ACPI_OBJECT_COMMON_HEADER acpi_semaphore os_semaphore;	/* Actual OS synchronization object */
  };
  
  struct acpi_object_mutex {
  	ACPI_OBJECT_COMMON_HEADER u8 sync_level;	/* 0-15, specified in Mutex() call */
  	u16 acquisition_depth;	/* Allow multiple Acquires, same thread */
  	acpi_mutex os_mutex;	/* Actual OS synchronization object */
  	acpi_thread_id thread_id;	/* Current owner of the mutex */
  	struct acpi_thread_state *owner_thread;	/* Current owner of the mutex */
  	union acpi_operand_object *prev;	/* Link for list of acquired mutexes */
  	union acpi_operand_object *next;	/* Link for list of acquired mutexes */
  	struct acpi_namespace_node *node;	/* Containing namespace node */
  	u8 original_sync_level;	/* Owner's original sync level (0-15) */
  };
  
  struct acpi_object_region {
  	ACPI_OBJECT_COMMON_HEADER u8 space_id;
  	struct acpi_namespace_node *node;	/* Containing namespace node */
  	union acpi_operand_object *handler;	/* Handler for region access */
  	union acpi_operand_object *next;
  	acpi_physical_address address;
  	u32 length;
  };
  
  struct acpi_object_method {
  	ACPI_OBJECT_COMMON_HEADER u8 method_flags;
  	u8 param_count;
  	u8 sync_level;
  	union acpi_operand_object *mutex;
  	u8 *aml_start;
  	union {
  		ACPI_INTERNAL_METHOD implementation;
  		union acpi_operand_object *handler;
  	} extra;
  
  	u32 aml_length;
  	u8 thread_count;
  	acpi_owner_id owner_id;
  };
  
  /******************************************************************************
   *
   * Objects that can be notified.  All share a common notify_info area.
   *
   *****************************************************************************/
  
  /*
   * Common fields for objects that support ASL notifications
   */
  #define ACPI_COMMON_NOTIFY_INFO \
  	union acpi_operand_object       *system_notify;     /* Handler for system notifies */\
  	union acpi_operand_object       *device_notify;     /* Handler for driver notifies */\
  	union acpi_operand_object       *handler;	/* Handler for Address space */
  
  struct acpi_object_notify_common {	/* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
  ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
  
  struct acpi_object_device {
  	ACPI_OBJECT_COMMON_HEADER
  	    ACPI_COMMON_NOTIFY_INFO struct acpi_gpe_block_info *gpe_block;
  };
  
  struct acpi_object_power_resource {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO u32 system_level;
  	u32 resource_order;
  };
  
  struct acpi_object_processor {
  	ACPI_OBJECT_COMMON_HEADER
  	    /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
  	u8 proc_id;
  	u8 length;
  	ACPI_COMMON_NOTIFY_INFO acpi_io_address address;
  };
  
  struct acpi_object_thermal_zone {
  ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_NOTIFY_INFO};
  
  /******************************************************************************
   *
   * Fields.  All share a common header/info field.
   *
   *****************************************************************************/
  
  /*
   * Common bitfield for the field objects
   * "Field Datum"  -- a datum from the actual field object
   * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
   */
  #define ACPI_COMMON_FIELD_INFO \
  	u8                              field_flags;        /* Access, update, and lock bits */\
  	u8                              attribute;          /* From access_as keyword */\
  	u8                              access_byte_width;  /* Read/Write size in bytes */\
  	struct acpi_namespace_node      *node;              /* Link back to parent node */\
  	u32                             bit_length;         /* Length of field in bits */\
  	u32                             base_byte_offset;   /* Byte offset within containing object */\
  	u32                             value;              /* Value to store into the Bank or Index register */\
  	u8                              start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
  	u8                              access_bit_width;	/* Read/Write size in bits (8-64) */
  
  struct acpi_object_field_common {	/* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj;	/* Parent Operation Region object (REGION/BANK fields only) */
  };
  
  struct acpi_object_region_field {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj;	/* Containing op_region object */
  };
  
  struct acpi_object_bank_field {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *region_obj;	/* Containing op_region object */
  	union acpi_operand_object *bank_obj;	/* bank_select Register object */
  };
  
  struct acpi_object_index_field {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO
  	    /*
  	     * No "RegionObj" pointer needed since the Index and Data registers
  	     * are each field definitions unto themselves.
  	     */
  	union acpi_operand_object *index_obj;	/* Index register */
  	union acpi_operand_object *data_obj;	/* Data register */
  };
  
  /* The buffer_field is different in that it is part of a Buffer, not an op_region */
  
  struct acpi_object_buffer_field {
  	ACPI_OBJECT_COMMON_HEADER ACPI_COMMON_FIELD_INFO union acpi_operand_object *buffer_obj;	/* Containing Buffer object */
  };
  
  /******************************************************************************
   *
   * Objects for handlers
   *
   *****************************************************************************/
  
  struct acpi_object_notify_handler {
  	ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *node;	/* Parent device */
  	u32 handler_type;
  	acpi_notify_handler handler;
  	void *context;
  	struct acpi_object_notify_handler *next;
  };
  
  struct acpi_object_addr_handler {
  	ACPI_OBJECT_COMMON_HEADER u8 space_id;
  	u8 handler_flags;
  	acpi_adr_space_handler handler;
  	struct acpi_namespace_node *node;	/* Parent device */
  	void *context;
  	acpi_adr_space_setup setup;
  	union acpi_operand_object *region_list;	/* regions using this handler */
  	union acpi_operand_object *next;
  };
  
  /* Flags for address handler (handler_flags) */
  
  #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
  
  /******************************************************************************
   *
   * Special internal objects
   *
   *****************************************************************************/
  
  /*
   * The Reference object is used for these opcodes:
   * Arg[0-6], Local[0-7], index_op, name_op, ref_of_op, load_op, load_table_op, debug_op
   * The Reference.Class differentiates these types.
   */
  struct acpi_object_reference {
  	ACPI_OBJECT_COMMON_HEADER u8 class;	/* Reference Class */
  	u8 target_type;		/* Used for Index Op */
  	u8 reserved;
  	void *object;		/* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
  	struct acpi_namespace_node *node;	/* ref_of or Namepath */
  	union acpi_operand_object **where;	/* Target of Index */
  	u32 value;		/* Used for Local/Arg/Index/ddb_handle */
  };
  
  /* Values for Reference.Class above */
  
  typedef enum {
  	ACPI_REFCLASS_LOCAL = 0,	/* Method local */
  	ACPI_REFCLASS_ARG = 1,	/* Method argument */
  	ACPI_REFCLASS_REFOF = 2,	/* Result of ref_of() TBD: Split to Ref/Node and Ref/operand_obj? */
  	ACPI_REFCLASS_INDEX = 3,	/* Result of Index() */
  	ACPI_REFCLASS_TABLE = 4,	/* ddb_handle - Load(), load_table() */
  	ACPI_REFCLASS_NAME = 5,	/* Reference to a named object */
  	ACPI_REFCLASS_DEBUG = 6,	/* Debug object */
  
  	ACPI_REFCLASS_MAX = 6
  } ACPI_REFERENCE_CLASSES;
  
  /*
   * Extra object is used as additional storage for types that
   * have AML code in their declarations (term_args) that must be
   * evaluated at run time.
   *
   * Currently: Region and field_unit types
   */
  struct acpi_object_extra {
  	ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;	/* _REG method for this region (if any) */
  	void *region_context;	/* Region-specific data */
  	u8 *aml_start;
  	u32 aml_length;
  };
  
  /* Additional data that can be attached to namespace nodes */
  
  struct acpi_object_data {
  	ACPI_OBJECT_COMMON_HEADER acpi_object_handler handler;
  	void *pointer;
  };
  
  /* Structure used when objects are cached for reuse */
  
  struct acpi_object_cache_list {
  	ACPI_OBJECT_COMMON_HEADER union acpi_operand_object *next;	/* Link for object cache and internal lists */
  };
  
  /******************************************************************************
   *
   * union acpi_operand_object Descriptor - a giant union of all of the above
   *
   *****************************************************************************/
  
  union acpi_operand_object {
  	struct acpi_object_common common;
  	struct acpi_object_integer integer;
  	struct acpi_object_string string;
  	struct acpi_object_buffer buffer;
  	struct acpi_object_package package;
  	struct acpi_object_event event;
  	struct acpi_object_method method;
  	struct acpi_object_mutex mutex;
  	struct acpi_object_region region;
  	struct acpi_object_notify_common common_notify;
  	struct acpi_object_device device;
  	struct acpi_object_power_resource power_resource;
  	struct acpi_object_processor processor;
  	struct acpi_object_thermal_zone thermal_zone;
  	struct acpi_object_field_common common_field;
  	struct acpi_object_region_field field;
  	struct acpi_object_buffer_field buffer_field;
  	struct acpi_object_bank_field bank_field;
  	struct acpi_object_index_field index_field;
  	struct acpi_object_notify_handler notify;
  	struct acpi_object_addr_handler address_space;
  	struct acpi_object_reference reference;
  	struct acpi_object_extra extra;
  	struct acpi_object_data data;
  	struct acpi_object_cache_list cache;
  
  	/*
  	 * Add namespace node to union in order to simplify code that accepts both
  	 * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
  	 * a common descriptor_type field in order to differentiate them.
  	 */
  	struct acpi_namespace_node node;
  };
  
  /******************************************************************************
   *
   * union acpi_descriptor - objects that share a common descriptor identifier
   *
   *****************************************************************************/
  
  /* Object descriptor types */
  
  #define ACPI_DESC_TYPE_CACHED           0x01	/* Used only when object is cached */
  #define ACPI_DESC_TYPE_STATE            0x02
  #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
  #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
  #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
  #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
  #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
  #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
  #define ACPI_DESC_TYPE_STATE_RESULT     0x09
  #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
  #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
  #define ACPI_DESC_TYPE_WALK             0x0C
  #define ACPI_DESC_TYPE_PARSER           0x0D
  #define ACPI_DESC_TYPE_OPERAND          0x0E
  #define ACPI_DESC_TYPE_NAMED            0x0F
  #define ACPI_DESC_TYPE_MAX              0x0F
  
  struct acpi_common_descriptor {
  	void *common_pointer;
  	u8 descriptor_type;	/* To differentiate various internal objs */
  };
  
  union acpi_descriptor {
  	struct acpi_common_descriptor common;
  	union acpi_operand_object object;
  	struct acpi_namespace_node node;
  	union acpi_parse_object op;
  };
  
  #pragma pack()
  
  #endif				/* _ACOBJECT_H */
  