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linux/include/acpi/acobject.h
Robert Moore f9f4601f33 ACPICA 20050708 from Bob Moore <robert.moore@intel.com> 
The use of the CPU stack in the debug version of the
subsystem has been considerably reduced.  Previously, a
debug structure was declared in every function that used
the debug macros.  This structure has been removed in
favor of declaring the individual elements as parameters
to the debug functions.  This reduces the cumulative stack
use during nested execution of ACPI function calls at the
cost of a small increase in the code size of the debug
version of the subsystem.  With assistance from Alexey
Starikovskiy and Len Brown.

Added the ACPI_GET_FUNCTION_NAME macro to enable the
compiler-dependent headers to define a macro that will
return the current function name at runtime (such as
__FUNCTION__ or _func_, etc.) The function name is used
by the debug trace output.  If ACPI_GET_FUNCTION_NAME
is not defined in the compiler-dependent header, the
function name is saved on the CPU stack (one pointer per
function.) This mechanism is used because apparently there
exists no standard ANSI-C defined macro that that returns
the function name.

Alexey Starikovskiy redesigned and reimplemented the
"Owner ID" mechanism used to track namespace objects
created/deleted by ACPI tables and control method
execution.  A bitmap is now used to allocate and free the
IDs, thus solving the wraparound problem present in the
previous implementation.  The size of the namespace node
descriptor was reduced by 2 bytes as a result.

Removed the UINT32_BIT and UINT16_BIT types that were used
for the bitfield flag definitions within the headers for
the predefined ACPI tables.  These have been replaced by
UINT8_BIT in order to increase the code portability of
the subsystem.  If the use of UINT8 remains a problem,
we may be forced to eliminate bitfields entirely because
of a lack of portability.

Alexey Starikovksiy enhanced the performance of
acpi_ut_update_object_reference.  This is a frequently used
function and this improvement increases the performance
of the entire subsystem.

Alexey Starikovskiy fixed several possible memory leaks
and the inverse - premature object deletion.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-14 00:42:23 -04:00

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 owner_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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