/* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ /****************************************************************************** * * Name: acobject.h - Definition of union acpi_operand_object (Internal object only) * * Copyright (C) 2000 - 2025, Intel Corp. *
*****************************************************************************/
#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 #pragmapack(8) #else #pragmapack(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 /* Integer is an AML constant */ #define AOPOBJ_STATIC_POINTER 0x02 /* Data is part of an ACPI table, don't delete */ #define AOPOBJ_DATA_VALID 0x04 /* Object is initialized and data is valid */ #define AOPOBJ_OBJECT_INITIALIZED 0x08 /* Region is initialized */ #define AOPOBJ_REG_CONNECTED 0x10 /* _REG was run */ #define AOPOBJ_SETUP_COMPLETE 0x20 /* Region setup is complete */ #define AOPOBJ_INVALID 0x40 /* Host OS won't allow a Region address */
/****************************************************************************** * * Basic data types *
*****************************************************************************/
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
/* Null terminated, ASCII characters only */
struct acpi_object_string {
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; void *pointer; /* Only for data table regions */
};
struct acpi_object_method {
ACPI_OBJECT_COMMON_HEADER;
u8 info_flags;
u8 param_count;
u8 sync_level; union acpi_operand_object *mutex; union acpi_operand_object *node;
u8 *aml_start; union {
acpi_internal_method implementation; union acpi_operand_object *handler;
} dispatch;
#define ACPI_METHOD_MODULE_LEVEL 0x01 /* Method is actually module-level code */ #define ACPI_METHOD_INTERNAL_ONLY 0x02 /* Method is implemented internally (_OSI) */ #define ACPI_METHOD_SERIALIZED 0x04 /* Method is serialized */ #define ACPI_METHOD_SERIALIZED_PENDING 0x08 /* Method is to be marked serialized */ #define ACPI_METHOD_IGNORE_SYNC_LEVEL 0x10 /* Method was auto-serialized at table load time */ #define ACPI_METHOD_MODIFIED_NAMESPACE 0x20 /* Method modified the namespace */
/****************************************************************************** * * 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 *notify_list[2]; /* Handlers for system/device notifies */\ union acpi_operand_object *handler /* Handler for Address space */
/* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
/****************************************************************************** * * 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_length /* For serial regions/fields */
/* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
struct acpi_object_field_common {
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;
u16 resource_length; union acpi_operand_object *region_obj; /* Containing op_region object */
u8 *resource_buffer; /* resource_template for serial regions/fields */
u16 pin_number_index; /* Index relative to previous Connection/Template */
u8 *internal_pcc_buffer; /* Internal buffer for fields associated with PCC */
};
/* * 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;
u8 is_create_field; /* Special case for objects created by create_field() */ union acpi_operand_object *buffer_obj; /* Containing Buffer object */
};
/****************************************************************************** * * Objects for handlers *
*****************************************************************************/
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_mutex context_mutex;
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 resolved; /* Reference has been resolved to a value */ 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 */
u8 *index_pointer; /* Used for Buffers and Strings */
u8 *aml; /* Used for deferred resolution of the ref */
u32 value; /* Used for Local/Arg/Index/ddb_handle */
};
/* Values for Reference.Class above */
typedefenum {
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) */ struct acpi_namespace_node *scope_node; void *region_context; /* Region-specific data */
u8 *aml_start;
u32 aml_length;
};
/* Additional data that can be attached to namespace nodes */
/* 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 *
*****************************************************************************/
/* * 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 *
*****************************************************************************/
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