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linux/drivers/acpi/executer/exresnte.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

291 lines
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/******************************************************************************
*
* Module Name: exresnte - AML Interpreter object resolution
*
*****************************************************************************/
/*
* 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/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_DEBUG_PRINT ((ACPI_DB_ERROR, "No object attached to node %p\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Package, type %s\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Buffer, type %s\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a String, type %s\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR, "Object not a Integer, type %s\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Untyped entry %p, no attached object!\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Unsupported Reference opcode %X (%s)\n",
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_DEBUG_PRINT ((ACPI_DB_ERROR,
"Node %p - Unknown object type %X\n",
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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