acobject.h

xen 3.2.2 源码

/******************************************************************************
 *
 * Name: acobject.h - Definition of union acpi_operand_object    (Internal object only)
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * 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


/*
 * 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.
 */

/*******************************************************************************
 *
 * Common Descriptors
 *
 ******************************************************************************/

/*
 * Common area for all objects.
 *
 * data_type is used to differentiate between internal descriptors, and MUST
 * be the first byte in this structure.
 */
#define ACPI_OBJECT_COMMON_HEADER   /* SIZE/ALIGNMENT: 32 bits, one ptr plus trailing 8-bit flag */\
	u8                                      descriptor;         /* To differentiate various internal objs */\
	u8                                      type;               /* acpi_object_type */\
	u16                                     reference_count;    /* For object deletion management */\
	union acpi_operand_object               *next_object;       /* Objects linked to parent NS node */\
	u8                                      flags; \

/* 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


/*
 * 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      /* SIZE/ALIGNMENT: 24 bits + three 32-bit values */\
	u8                                      field_flags;        /* Access, update, and lock bits */\
	u8                                      attribute;          /* From access_as keyword */\
	u8                                      access_byte_width;  /* Read/Write size in bytes */\
	u32                                     bit_length;         /* Length of field in bits */\
	u32                                     base_byte_offset;   /* Byte offset within containing object */\
	u8                                      start_field_bit_offset;/* Bit offset within first field datum (0-63) */\
	u8                                      access_bit_width;   /* Read/Write size in bits (8-64) */\
	u32                                     value;              /* Value to store into the Bank or Index register */\
	struct acpi_namespace_node              *node;              /* Link back to parent node */


/*
 * Fields common to both Strings and Buffers
 */
#define ACPI_COMMON_BUFFER_INFO \
	u32                                     length;


/*
 * 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 */


/******************************************************************************
 *
 * Basic data types
 *
 *****************************************************************************/

struct acpi_object_common
{
	ACPI_OBJECT_COMMON_HEADER
};


struct acpi_object_integer
{
	ACPI_OBJECT_COMMON_HEADER
	acpi_integer                            value;
};

/*
 * Note: The String and Buffer object must be identical through the Pointer
 * element.  There is code that depends on this.
 */
struct acpi_object_string           /* Null terminated, ASCII characters only */
{
	ACPI_OBJECT_COMMON_HEADER
	ACPI_COMMON_BUFFER_INFO
	char                                    *pointer;           /* String in AML stream or allocated string */
};


struct acpi_object_buffer
{
	ACPI_OBJECT_COMMON_HEADER
	ACPI_COMMON_BUFFER_INFO
	u8                                      *pointer;           /* Buffer in AML stream or allocated buffer */
	struct acpi_namespace_node              *node;              /* Link back to parent node */
	u8                                      *aml_start;
	u32                                     aml_length;
};


struct acpi_object_package
{
	ACPI_OBJECT_COMMON_HEADER

	u32                                     count;              /* # of elements in package */
	u32                                     aml_length;
	u8                                      *aml_start;
	struct acpi_namespace_node              *node;              /* Link back to parent node */
	union acpi_operand_object               **elements;         /* Array of pointers to acpi_objects */
};


/******************************************************************************
 *
 * Complex data types
 *
 *****************************************************************************/

struct acpi_object_event
{
	ACPI_OBJECT_COMMON_HEADER
	void                                    *semaphore;
};


#define ACPI_INFINITE_CONCURRENCY   0xFF

typedef
acpi_status (*ACPI_INTERNAL_METHOD) (
	struct acpi_walk_state          *walk_state);

struct acpi_object_method
{
	ACPI_OBJECT_COMMON_HEADER
	u8                                      method_flags;
	u8                                      param_count;
	u32                                     aml_length;
	void                                    *semaphore;
	u8                                      *aml_start;
	ACPI_INTERNAL_METHOD            implementation;
	u8                                      concurrency;
	u8                                      thread_count;
	acpi_owner_id                           owning_id;
};


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 */
	struct acpi_thread_state                *owner_thread;      /* Current owner of the mutex */
	void                                    *semaphore;         /* Actual OS synchronization object */
	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;
	union acpi_operand_object               *handler;           /* Handler for region access */
	struct acpi_namespace_node              *node;              /* Containing namespace node */
	union acpi_operand_object               *next;
	u32                                     length;
	acpi_physical_address                   address;
};


/******************************************************************************
 *
 * Objects that can be notified.  All share a common notify_info area.
 *
 *****************************************************************************/

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;
};