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android_kernel_samsung_msm8976/drivers/acpi/executer/exresnte.c
Bob Moore b8e4d89357 [ACPI] ACPICA 20060127 
Implemented support in the Resource Manager to allow
unresolved namestring references within resource package
objects for the _PRT method. This support is in addition
to the previously implemented unresolved reference
support within the AML parser. If the interpreter slack
mode is enabled (true on Linux unless acpi=strict),
these unresolved references will be passed through
to the caller as a NULL package entry.
http://bugzilla.kernel.org/show_bug.cgi?id=5741

Implemented and deployed new macros and functions for
error and warning messages across the subsystem. These
macros are simpler and generate less code than their
predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_*
macros.

Implemented the acpi_cpu_flags type to simplify host OS
integration of the Acquire/Release Lock OSL interfaces.
Suggested by Steven Rostedt and Andrew Morton.

Fixed a problem where Alias ASL operators are sometimes
not correctly resolved. causing AE_AML_INTERNAL
http://bugzilla.kernel.org/show_bug.cgi?id=5189
http://bugzilla.kernel.org/show_bug.cgi?id=5674

Fixed several problems with the implementation of the
ConcatenateResTemplate ASL operator. As per the ACPI
specification, zero length buffers are now treated as a
single EndTag. One-length buffers always cause a fatal
exception. Non-zero length buffers that do not end with
a full 2-byte EndTag cause a fatal exception.

Fixed a possible structure overwrite in the
AcpiGetObjectInfo external interface. (With assistance
from Thomas Renninger)

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
2006-01-31 03:25:09 -05:00

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/******************************************************************************
*
* Module Name: exresnte - AML Interpreter object resolution
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2006, 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/acdispat.h>
#include <acpi/acinterp.h>
#include <acpi/acnamesp.h>
#include <acpi/acparser.h>
#include <acpi/amlcode.h>
#define _COMPONENT ACPI_EXECUTER
ACPI_MODULE_NAME("exresnte")
/*******************************************************************************
*
* FUNCTION: acpi_ex_resolve_node_to_value
*
* PARAMETERS: object_ptr - Pointer to a location that contains
* a pointer to a NS node, and will receive a
* pointer to the resolved object.
* walk_state - Current state. Valid only if executing AML
* code. NULL if simply resolving an object
*
* RETURN: Status
*
* DESCRIPTION: Resolve a Namespace node to a valued object
*
* Note: for some of the data types, the pointer attached to the Node
* can be either a pointer to an actual internal object or a pointer into the
* AML stream itself. These types are currently:
*
* ACPI_TYPE_INTEGER
* ACPI_TYPE_STRING
* ACPI_TYPE_BUFFER
* ACPI_TYPE_MUTEX
* ACPI_TYPE_PACKAGE
*
******************************************************************************/
acpi_status
acpi_ex_resolve_node_to_value(struct acpi_namespace_node **object_ptr,
struct acpi_walk_state *walk_state)
{
acpi_status status = AE_OK;
union acpi_operand_object *source_desc;
union acpi_operand_object *obj_desc = NULL;
struct acpi_namespace_node *node;
acpi_object_type entry_type;
ACPI_FUNCTION_TRACE("ex_resolve_node_to_value");
/*
* The stack pointer points to a struct acpi_namespace_node (Node). Get the
* object that is attached to the Node.
*/
node = *object_ptr;
source_desc = acpi_ns_get_attached_object(node);
entry_type = acpi_ns_get_type((acpi_handle) node);
ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Entry=%p source_desc=%p [%s]\n",
node, source_desc,
acpi_ut_get_type_name(entry_type)));
if ((entry_type == ACPI_TYPE_LOCAL_ALIAS) ||
(entry_type == ACPI_TYPE_LOCAL_METHOD_ALIAS)) {
/* There is always exactly one level of indirection */
node = ACPI_CAST_PTR(struct acpi_namespace_node, node->object);
source_desc = acpi_ns_get_attached_object(node);
entry_type = acpi_ns_get_type((acpi_handle) node);
*object_ptr = node;
}
/*
* Several object types require no further processing:
* 1) Devices rarely have an attached object, return the Node
* 2) Method locals and arguments have a pseudo-Node
*/
if (entry_type == ACPI_TYPE_DEVICE ||
(node->flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL))) {
return_ACPI_STATUS(AE_OK);
}
if (!source_desc) {
ACPI_ERROR((AE_INFO, "No object attached to node %p", node));
return_ACPI_STATUS(AE_AML_NO_OPERAND);
}
/*
* Action is based on the type of the Node, which indicates the type
* of the attached object or pointer
*/
switch (entry_type) {
case ACPI_TYPE_PACKAGE:
if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_PACKAGE) {
ACPI_ERROR((AE_INFO, "Object not a Package, type %s",
acpi_ut_get_object_type_name(source_desc)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
status = acpi_ds_get_package_arguments(source_desc);
if (ACPI_SUCCESS(status)) {
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
}
break;
case ACPI_TYPE_BUFFER:
if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_BUFFER) {
ACPI_ERROR((AE_INFO, "Object not a Buffer, type %s",
acpi_ut_get_object_type_name(source_desc)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
status = acpi_ds_get_buffer_arguments(source_desc);
if (ACPI_SUCCESS(status)) {
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
}
break;
case ACPI_TYPE_STRING:
if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_STRING) {
ACPI_ERROR((AE_INFO, "Object not a String, type %s",
acpi_ut_get_object_type_name(source_desc)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
break;
case ACPI_TYPE_INTEGER:
if (ACPI_GET_OBJECT_TYPE(source_desc) != ACPI_TYPE_INTEGER) {
ACPI_ERROR((AE_INFO, "Object not a Integer, type %s",
acpi_ut_get_object_type_name(source_desc)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
break;
case ACPI_TYPE_BUFFER_FIELD:
case ACPI_TYPE_LOCAL_REGION_FIELD:
case ACPI_TYPE_LOCAL_BANK_FIELD:
case ACPI_TYPE_LOCAL_INDEX_FIELD:
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"field_read Node=%p source_desc=%p Type=%X\n",
node, source_desc, entry_type));
status =
acpi_ex_read_data_from_field(walk_state, source_desc,
&obj_desc);
break;
/* For these objects, just return the object attached to the Node */
case ACPI_TYPE_MUTEX:
case ACPI_TYPE_METHOD:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_EVENT:
case ACPI_TYPE_REGION:
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
break;
/* TYPE_ANY is untyped, and thus there is no object associated with it */
case ACPI_TYPE_ANY:
ACPI_ERROR((AE_INFO,
"Untyped entry %p, no attached object!", node));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE); /* Cannot be AE_TYPE */
case ACPI_TYPE_LOCAL_REFERENCE:
switch (source_desc->reference.opcode) {
case AML_LOAD_OP:
/* This is a ddb_handle */
/* Return an additional reference to the object */
obj_desc = source_desc;
acpi_ut_add_reference(obj_desc);
break;
default:
/* No named references are allowed here */
ACPI_ERROR((AE_INFO,
"Unsupported Reference opcode %X (%s)",
source_desc->reference.opcode,
acpi_ps_get_opcode_name(source_desc->
reference.opcode)));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
}
break;
default:
/* Default case is for unknown types */
ACPI_ERROR((AE_INFO,
"Node %p - Unknown object type %X",
node, entry_type));
return_ACPI_STATUS(AE_AML_OPERAND_TYPE);
} /* switch (entry_type) */
/* Return the object descriptor */
*object_ptr = (void *)obj_desc;
return_ACPI_STATUS(status);
}
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