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linux/include/acpi/acobject.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2 
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

502 lines
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/******************************************************************************
*
* 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;
};
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
ACPI_COMMON_NOTIFY_INFO
u32 proc_id;
u32 length;
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.
*
*****************************************************************************/
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; /* Containing 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 "region_obj" 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 */
acpi_notify_handler handler;
void *context;
};
/* Flags for address handler */
#define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED 0x1
struct acpi_object_addr_handler
{
ACPI_OBJECT_COMMON_HEADER
u8 space_id;
u16 hflags;
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;
};
/******************************************************************************
*
* Special internal objects
*
*****************************************************************************/
/*
* The Reference object type is used for these opcodes:
* Arg[0-6], Local[0-7], index_op, name_op, zero_op, one_op, ones_op, debug_op
*/
struct acpi_object_reference
{
ACPI_OBJECT_COMMON_HEADER
u8 target_type; /* Used for index_op */
u16 opcode;
u32 offset; /* Used for arg_op, local_op, and index_op */
void *object; /* name_op=>HANDLE to obj, index_op=>union acpi_operand_object */
struct acpi_namespace_node *node;
union acpi_operand_object **where;
};
/*
* 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
u8 byte_fill1;
u16 word_fill1;
u32 aml_length;
u8 *aml_start;
struct acpi_namespace_node *method_REG; /* _REG method for this region (if any) */
void *region_context; /* Region-specific data */
};
/* 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;
};
/******************************************************************************
*
* 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
union acpi_descriptor
{
u8 descriptor_id; /* To differentiate various internal objs */\
union acpi_operand_object object;
struct acpi_namespace_node node;
union acpi_parse_object op;
};
#endif /* _ACOBJECT_H */
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