linux/drivers/acpi/namespace/nsobject.c
Robert Moore 44f6c01242 ACPICA 20050408 from Bob Moore
Fixed three cases in the interpreter where an "index"
argument to an ASL function was still (internally) 32
bits instead of the required 64 bits.  This was the Index
argument to the Index, Mid, and Match operators.

The "strupr" function is now permanently local
(acpi_ut_strupr), since this is not a POSIX-defined
function and not present in most kernel-level C
libraries. References to the C library strupr function
have been removed from the headers.

Completed the deployment of static
functions/prototypes. All prototypes with the static
attribute have been moved from the headers to the owning
C file.

ACPICA 20050329 from Bob Moore

An error is now generated if an attempt is made to create
a Buffer Field of length zero (A CreateField with a length
operand of zero.)

The interpreter now issues a warning whenever executable
code at the module level is detected during ACPI table
load. This will give some idea of the prevalence of this
type of code.

Implemented support for references to named objects (other
than control methods) within package objects.

Enhanced package object output for the debug
object. Package objects are now completely dumped, showing
all elements.

Enhanced miscellaneous object output for the debug
object. Any object can now be written to the debug object
(for example, a device object can be written, and the type
of the object will be displayed.)

The "static" qualifier has been added to all local
functions across the core subsystem.

The number of "long" lines (> 80 chars) within the source
has been significantly reduced, by about 1/3.

Cleaned up all header files to ensure that all CA/iASL
functions are prototyped (even static functions) and the
formatting is consistent.

Two new header files have been added, acopcode.h and
acnames.h.

Removed several obsolete functions that were no longer
used.

Signed-off-by: Len Brown <len.brown@intel.com>
2005-07-12 00:08:52 -04:00

465 lines
13 KiB
C

/*******************************************************************************
*
* Module Name: nsobject - Utilities for objects attached to namespace
* table entries
*
******************************************************************************/
/*
* 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.
*/
#include <acpi/acpi.h>
#include <acpi/acnamesp.h>
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsobject")
/*******************************************************************************
*
* FUNCTION: acpi_ns_attach_object
*
* PARAMETERS: Node - Parent Node
* Object - Object to be attached
* Type - Type of object, or ACPI_TYPE_ANY if not
* known
*
* RETURN: Status
*
* DESCRIPTION: Record the given object as the value associated with the
* name whose acpi_handle is passed. If Object is NULL
* and Type is ACPI_TYPE_ANY, set the name as having no value.
* Note: Future may require that the Node->Flags field be passed
* as a parameter.
*
* MUTEX: Assumes namespace is locked
*
******************************************************************************/
acpi_status
acpi_ns_attach_object (
struct acpi_namespace_node *node,
union acpi_operand_object *object,
acpi_object_type type)
{
union acpi_operand_object *obj_desc;
union acpi_operand_object *last_obj_desc;
acpi_object_type object_type = ACPI_TYPE_ANY;
ACPI_FUNCTION_TRACE ("ns_attach_object");
/*
* Parameter validation
*/
if (!node) {
/* Invalid handle */
ACPI_REPORT_ERROR (("ns_attach_object: Null named_obj handle\n"));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (!object && (ACPI_TYPE_ANY != type)) {
/* Null object */
ACPI_REPORT_ERROR ((
"ns_attach_object: Null object, but type not ACPI_TYPE_ANY\n"));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (ACPI_GET_DESCRIPTOR_TYPE (node) != ACPI_DESC_TYPE_NAMED) {
/* Not a name handle */
ACPI_REPORT_ERROR (("ns_attach_object: Invalid handle %p [%s]\n",
node, acpi_ut_get_descriptor_name (node)));
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Check if this object is already attached */
if (node->object == object) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj %p already installed in name_obj %p\n",
object, node));
return_ACPI_STATUS (AE_OK);
}
/* If null object, we will just install it */
if (!object) {
obj_desc = NULL;
object_type = ACPI_TYPE_ANY;
}
/*
* If the source object is a namespace Node with an attached object,
* we will use that (attached) object
*/
else if ((ACPI_GET_DESCRIPTOR_TYPE (object) == ACPI_DESC_TYPE_NAMED) &&
((struct acpi_namespace_node *) object)->object) {
/*
* Value passed is a name handle and that name has a
* non-null value. Use that name's value and type.
*/
obj_desc = ((struct acpi_namespace_node *) object)->object;
object_type = ((struct acpi_namespace_node *) object)->type;
}
/*
* Otherwise, we will use the parameter object, but we must type
* it first
*/
else {
obj_desc = (union acpi_operand_object *) object;
/* Use the given type */
object_type = type;
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Installing %p into Node %p [%4.4s]\n",
obj_desc, node, acpi_ut_get_node_name (node)));
/* Detach an existing attached object if present */
if (node->object) {
acpi_ns_detach_object (node);
}
if (obj_desc) {
/*
* Must increment the new value's reference count
* (if it is an internal object)
*/
acpi_ut_add_reference (obj_desc);
/*
* Handle objects with multiple descriptors - walk
* to the end of the descriptor list
*/
last_obj_desc = obj_desc;
while (last_obj_desc->common.next_object) {
last_obj_desc = last_obj_desc->common.next_object;
}
/* Install the object at the front of the object list */
last_obj_desc->common.next_object = node->object;
}
node->type = (u8) object_type;
node->object = obj_desc;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_detach_object
*
* PARAMETERS: Node - A Namespace node whose object will be detached
*
* RETURN: None.
*
* DESCRIPTION: Detach/delete an object associated with a namespace node.
* if the object is an allocated object, it is freed.
* Otherwise, the field is simply cleared.
*
******************************************************************************/
void
acpi_ns_detach_object (
struct acpi_namespace_node *node)
{
union acpi_operand_object *obj_desc;
ACPI_FUNCTION_TRACE ("ns_detach_object");
obj_desc = node->object;
if (!obj_desc ||
(ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_DATA)) {
return_VOID;
}
/* Clear the entry in all cases */
node->object = NULL;
if (ACPI_GET_DESCRIPTOR_TYPE (obj_desc) == ACPI_DESC_TYPE_OPERAND) {
node->object = obj_desc->common.next_object;
if (node->object &&
(ACPI_GET_OBJECT_TYPE (node->object) != ACPI_TYPE_LOCAL_DATA)) {
node->object = node->object->common.next_object;
}
}
/* Reset the node type to untyped */
node->type = ACPI_TYPE_ANY;
ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "Node %p [%4.4s] Object %p\n",
node, acpi_ut_get_node_name (node), obj_desc));
/* Remove one reference on the object (and all subobjects) */
acpi_ut_remove_reference (obj_desc);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_get_attached_object
*
* PARAMETERS: Node - Namespace node
*
* RETURN: Current value of the object field from the Node whose
* handle is passed
*
* DESCRIPTION: Obtain the object attached to a namespace node.
*
******************************************************************************/
union acpi_operand_object *
acpi_ns_get_attached_object (
struct acpi_namespace_node *node)
{
ACPI_FUNCTION_TRACE_PTR ("ns_get_attached_object", node);
if (!node) {
ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Null Node ptr\n"));
return_PTR (NULL);
}
if (!node->object ||
((ACPI_GET_DESCRIPTOR_TYPE (node->object) != ACPI_DESC_TYPE_OPERAND) &&
(ACPI_GET_DESCRIPTOR_TYPE (node->object) != ACPI_DESC_TYPE_NAMED)) ||
(ACPI_GET_OBJECT_TYPE (node->object) == ACPI_TYPE_LOCAL_DATA)) {
return_PTR (NULL);
}
return_PTR (node->object);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_get_secondary_object
*
* PARAMETERS: Node - Namespace node
*
* RETURN: Current value of the object field from the Node whose
* handle is passed.
*
* DESCRIPTION: Obtain a secondary object associated with a namespace node.
*
******************************************************************************/
union acpi_operand_object *
acpi_ns_get_secondary_object (
union acpi_operand_object *obj_desc)
{
ACPI_FUNCTION_TRACE_PTR ("ns_get_secondary_object", obj_desc);
if ((!obj_desc) ||
(ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_DATA) ||
(!obj_desc->common.next_object) ||
(ACPI_GET_OBJECT_TYPE (obj_desc->common.next_object) == ACPI_TYPE_LOCAL_DATA)) {
return_PTR (NULL);
}
return_PTR (obj_desc->common.next_object);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_attach_data
*
* PARAMETERS: Node - Namespace node
* Handler - Handler to be associated with the data
* Data - Data to be attached
*
* RETURN: Status
*
* DESCRIPTION: Low-level attach data. Create and attach a Data object.
*
******************************************************************************/
acpi_status
acpi_ns_attach_data (
struct acpi_namespace_node *node,
acpi_object_handler handler,
void *data)
{
union acpi_operand_object *prev_obj_desc;
union acpi_operand_object *obj_desc;
union acpi_operand_object *data_desc;
/* We only allow one attachment per handler */
prev_obj_desc = NULL;
obj_desc = node->object;
while (obj_desc) {
if ((ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
(obj_desc->data.handler == handler)) {
return (AE_ALREADY_EXISTS);
}
prev_obj_desc = obj_desc;
obj_desc = obj_desc->common.next_object;
}
/* Create an internal object for the data */
data_desc = acpi_ut_create_internal_object (ACPI_TYPE_LOCAL_DATA);
if (!data_desc) {
return (AE_NO_MEMORY);
}
data_desc->data.handler = handler;
data_desc->data.pointer = data;
/* Install the data object */
if (prev_obj_desc) {
prev_obj_desc->common.next_object = data_desc;
}
else {
node->object = data_desc;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_detach_data
*
* PARAMETERS: Node - Namespace node
* Handler - Handler associated with the data
*
* RETURN: Status
*
* DESCRIPTION: Low-level detach data. Delete the data node, but the caller
* is responsible for the actual data.
*
******************************************************************************/
acpi_status
acpi_ns_detach_data (
struct acpi_namespace_node *node,
acpi_object_handler handler)
{
union acpi_operand_object *obj_desc;
union acpi_operand_object *prev_obj_desc;
prev_obj_desc = NULL;
obj_desc = node->object;
while (obj_desc) {
if ((ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
(obj_desc->data.handler == handler)) {
if (prev_obj_desc) {
prev_obj_desc->common.next_object = obj_desc->common.next_object;
}
else {
node->object = obj_desc->common.next_object;
}
acpi_ut_remove_reference (obj_desc);
return (AE_OK);
}
prev_obj_desc = obj_desc;
obj_desc = obj_desc->common.next_object;
}
return (AE_NOT_FOUND);
}
/*******************************************************************************
*
* FUNCTION: acpi_ns_get_attached_data
*
* PARAMETERS: Node - Namespace node
* Handler - Handler associated with the data
* Data - Where the data is returned
*
* RETURN: Status
*
* DESCRIPTION: Low level interface to obtain data previously associated with
* a namespace node.
*
******************************************************************************/
acpi_status
acpi_ns_get_attached_data (
struct acpi_namespace_node *node,
acpi_object_handler handler,
void **data)
{
union acpi_operand_object *obj_desc;
obj_desc = node->object;
while (obj_desc) {
if ((ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_LOCAL_DATA) &&
(obj_desc->data.handler == handler)) {
*data = obj_desc->data.pointer;
return (AE_OK);
}
obj_desc = obj_desc->common.next_object;
}
return (AE_NOT_FOUND);
}