1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
671 lines
18 KiB
C
671 lines
18 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: utobject - ACPI object create/delete/size/cache routines
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* 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>
|
|
#include <acpi/amlcode.h>
|
|
|
|
|
|
#define _COMPONENT ACPI_UTILITIES
|
|
ACPI_MODULE_NAME ("utobject")
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_internal_object_dbg
|
|
*
|
|
* PARAMETERS: module_name - Source file name of caller
|
|
* line_number - Line number of caller
|
|
* component_id - Component type of caller
|
|
* Type - ACPI Type of the new object
|
|
*
|
|
* RETURN: Object - The new object. Null on failure
|
|
*
|
|
* DESCRIPTION: Create and initialize a new internal object.
|
|
*
|
|
* NOTE: We always allocate the worst-case object descriptor because
|
|
* these objects are cached, and we want them to be
|
|
* one-size-satisifies-any-request. This in itself may not be
|
|
* the most memory efficient, but the efficiency of the object
|
|
* cache should more than make up for this!
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *
|
|
acpi_ut_create_internal_object_dbg (
|
|
char *module_name,
|
|
u32 line_number,
|
|
u32 component_id,
|
|
acpi_object_type type)
|
|
{
|
|
union acpi_operand_object *object;
|
|
union acpi_operand_object *second_object;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_STR ("ut_create_internal_object_dbg", acpi_ut_get_type_name (type));
|
|
|
|
|
|
/* Allocate the raw object descriptor */
|
|
|
|
object = acpi_ut_allocate_object_desc_dbg (module_name, line_number, component_id);
|
|
if (!object) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
switch (type) {
|
|
case ACPI_TYPE_REGION:
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
|
|
/* These types require a secondary object */
|
|
|
|
second_object = acpi_ut_allocate_object_desc_dbg (module_name, line_number, component_id);
|
|
if (!second_object) {
|
|
acpi_ut_delete_object_desc (object);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
second_object->common.type = ACPI_TYPE_LOCAL_EXTRA;
|
|
second_object->common.reference_count = 1;
|
|
|
|
/* Link the second object to the first */
|
|
|
|
object->common.next_object = second_object;
|
|
break;
|
|
|
|
default:
|
|
/* All others have no secondary object */
|
|
break;
|
|
}
|
|
|
|
/* Save the object type in the object descriptor */
|
|
|
|
object->common.type = (u8) type;
|
|
|
|
/* Init the reference count */
|
|
|
|
object->common.reference_count = 1;
|
|
|
|
/* Any per-type initialization should go here */
|
|
|
|
return_PTR (object);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_buffer_object
|
|
*
|
|
* PARAMETERS: buffer_size - Size of buffer to be created
|
|
*
|
|
* RETURN: Pointer to a new Buffer object
|
|
*
|
|
* DESCRIPTION: Create a fully initialized buffer object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *
|
|
acpi_ut_create_buffer_object (
|
|
acpi_size buffer_size)
|
|
{
|
|
union acpi_operand_object *buffer_desc;
|
|
u8 *buffer = NULL;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ut_create_buffer_object", buffer_size);
|
|
|
|
|
|
/* Create a new Buffer object */
|
|
|
|
buffer_desc = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
|
|
if (!buffer_desc) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Create an actual buffer only if size > 0 */
|
|
|
|
if (buffer_size > 0) {
|
|
/* Allocate the actual buffer */
|
|
|
|
buffer = ACPI_MEM_CALLOCATE (buffer_size);
|
|
if (!buffer) {
|
|
ACPI_REPORT_ERROR (("create_buffer: could not allocate size %X\n",
|
|
(u32) buffer_size));
|
|
acpi_ut_remove_reference (buffer_desc);
|
|
return_PTR (NULL);
|
|
}
|
|
}
|
|
|
|
/* Complete buffer object initialization */
|
|
|
|
buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
|
|
buffer_desc->buffer.pointer = buffer;
|
|
buffer_desc->buffer.length = (u32) buffer_size;
|
|
|
|
/* Return the new buffer descriptor */
|
|
|
|
return_PTR (buffer_desc);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_create_string_object
|
|
*
|
|
* PARAMETERS: string_size - Size of string to be created. Does not
|
|
* include NULL terminator, this is added
|
|
* automatically.
|
|
*
|
|
* RETURN: Pointer to a new String object
|
|
*
|
|
* DESCRIPTION: Create a fully initialized string object
|
|
*
|
|
******************************************************************************/
|
|
|
|
union acpi_operand_object *
|
|
acpi_ut_create_string_object (
|
|
acpi_size string_size)
|
|
{
|
|
union acpi_operand_object *string_desc;
|
|
char *string;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 ("ut_create_string_object", string_size);
|
|
|
|
|
|
/* Create a new String object */
|
|
|
|
string_desc = acpi_ut_create_internal_object (ACPI_TYPE_STRING);
|
|
if (!string_desc) {
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/*
|
|
* Allocate the actual string buffer -- (Size + 1) for NULL terminator.
|
|
* NOTE: Zero-length strings are NULL terminated
|
|
*/
|
|
string = ACPI_MEM_CALLOCATE (string_size + 1);
|
|
if (!string) {
|
|
ACPI_REPORT_ERROR (("create_string: could not allocate size %X\n",
|
|
(u32) string_size));
|
|
acpi_ut_remove_reference (string_desc);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Complete string object initialization */
|
|
|
|
string_desc->string.pointer = string;
|
|
string_desc->string.length = (u32) string_size;
|
|
|
|
/* Return the new string descriptor */
|
|
|
|
return_PTR (string_desc);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_valid_internal_object
|
|
*
|
|
* PARAMETERS: Object - Object to be validated
|
|
*
|
|
* RETURN: Validate a pointer to be an union acpi_operand_object
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8
|
|
acpi_ut_valid_internal_object (
|
|
void *object)
|
|
{
|
|
|
|
ACPI_FUNCTION_NAME ("ut_valid_internal_object");
|
|
|
|
|
|
/* Check for a null pointer */
|
|
|
|
if (!object) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Null Object Ptr\n"));
|
|
return (FALSE);
|
|
}
|
|
|
|
/* Check the descriptor type field */
|
|
|
|
switch (ACPI_GET_DESCRIPTOR_TYPE (object)) {
|
|
case ACPI_DESC_TYPE_OPERAND:
|
|
|
|
/* The object appears to be a valid union acpi_operand_object */
|
|
|
|
return (TRUE);
|
|
|
|
default:
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"%p is not not an ACPI operand obj [%s]\n",
|
|
object, acpi_ut_get_descriptor_name (object)));
|
|
break;
|
|
}
|
|
|
|
return (FALSE);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_allocate_object_desc_dbg
|
|
*
|
|
* PARAMETERS: module_name - Caller's module name (for error output)
|
|
* line_number - Caller's line number (for error output)
|
|
* component_id - Caller's component ID (for error output)
|
|
*
|
|
* RETURN: Pointer to newly allocated object descriptor. Null on error
|
|
*
|
|
* DESCRIPTION: Allocate a new object descriptor. Gracefully handle
|
|
* error conditions.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void *
|
|
acpi_ut_allocate_object_desc_dbg (
|
|
char *module_name,
|
|
u32 line_number,
|
|
u32 component_id)
|
|
{
|
|
union acpi_operand_object *object;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("ut_allocate_object_desc_dbg");
|
|
|
|
|
|
object = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_OPERAND);
|
|
if (!object) {
|
|
_ACPI_REPORT_ERROR (module_name, line_number, component_id,
|
|
("Could not allocate an object descriptor\n"));
|
|
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Mark the descriptor type */
|
|
|
|
ACPI_SET_DESCRIPTOR_TYPE (object, ACPI_DESC_TYPE_OPERAND);
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
|
|
object, (u32) sizeof (union acpi_operand_object)));
|
|
|
|
return_PTR (object);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_delete_object_desc
|
|
*
|
|
* PARAMETERS: Object - An Acpi internal object to be deleted
|
|
*
|
|
* RETURN: None.
|
|
*
|
|
* DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ut_delete_object_desc (
|
|
union acpi_operand_object *object)
|
|
{
|
|
ACPI_FUNCTION_TRACE_PTR ("ut_delete_object_desc", object);
|
|
|
|
|
|
/* Object must be an union acpi_operand_object */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (object) != ACPI_DESC_TYPE_OPERAND) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"%p is not an ACPI Operand object [%s]\n", object,
|
|
acpi_ut_get_descriptor_name (object)));
|
|
return_VOID;
|
|
}
|
|
|
|
acpi_ut_release_to_cache (ACPI_MEM_LIST_OPERAND, object);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
#ifdef ACPI_ENABLE_OBJECT_CACHE
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_delete_object_cache
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Purge the global state object cache. Used during subsystem
|
|
* termination.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
acpi_ut_delete_object_cache (
|
|
void)
|
|
{
|
|
ACPI_FUNCTION_TRACE ("ut_delete_object_cache");
|
|
|
|
|
|
acpi_ut_delete_generic_cache (ACPI_MEM_LIST_OPERAND);
|
|
return_VOID;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_simple_object_size
|
|
*
|
|
* PARAMETERS: *internal_object - Pointer to the object we are examining
|
|
* *obj_length - Where the length is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain a simple object for return to an external user.
|
|
*
|
|
* The length includes the object structure plus any additional
|
|
* needed space.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_simple_object_size (
|
|
union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_size length;
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ut_get_simple_object_size", internal_object);
|
|
|
|
|
|
/* Handle a null object (Could be a uninitialized package element -- which is legal) */
|
|
|
|
if (!internal_object) {
|
|
*obj_length = 0;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* Start with the length of the Acpi object */
|
|
|
|
length = sizeof (union acpi_object);
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (internal_object) == ACPI_DESC_TYPE_NAMED) {
|
|
/* Object is a named object (reference), just return the length */
|
|
|
|
*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD (length);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/*
|
|
* The final length depends on the object type
|
|
* Strings and Buffers are packed right up against the parent object and
|
|
* must be accessed bytewise or there may be alignment problems on
|
|
* certain processors
|
|
*/
|
|
switch (ACPI_GET_OBJECT_TYPE (internal_object)) {
|
|
case ACPI_TYPE_STRING:
|
|
|
|
length += (acpi_size) internal_object->string.length + 1;
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_BUFFER:
|
|
|
|
length += (acpi_size) internal_object->buffer.length;
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_INTEGER:
|
|
case ACPI_TYPE_PROCESSOR:
|
|
case ACPI_TYPE_POWER:
|
|
|
|
/*
|
|
* No extra data for these types
|
|
*/
|
|
break;
|
|
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
|
|
switch (internal_object->reference.opcode) {
|
|
case AML_INT_NAMEPATH_OP:
|
|
|
|
/*
|
|
* Get the actual length of the full pathname to this object.
|
|
* The reference will be converted to the pathname to the object
|
|
*/
|
|
length += ACPI_ROUND_UP_TO_NATIVE_WORD (acpi_ns_get_pathname_length (internal_object->reference.node));
|
|
break;
|
|
|
|
default:
|
|
|
|
/*
|
|
* No other reference opcodes are supported.
|
|
* Notably, Locals and Args are not supported, but this may be
|
|
* required eventually.
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Unsupported Reference opcode=%X in object %p\n",
|
|
internal_object->reference.opcode, internal_object));
|
|
status = AE_TYPE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Unsupported type=%X in object %p\n",
|
|
ACPI_GET_OBJECT_TYPE (internal_object), internal_object));
|
|
status = AE_TYPE;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Account for the space required by the object rounded up to the next
|
|
* multiple of the machine word size. This keeps each object aligned
|
|
* on a machine word boundary. (preventing alignment faults on some
|
|
* machines.)
|
|
*/
|
|
*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD (length);
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_element_length
|
|
*
|
|
* PARAMETERS: acpi_pkg_callback
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get the length of one package element.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_element_length (
|
|
u8 object_type,
|
|
union acpi_operand_object *source_object,
|
|
union acpi_generic_state *state,
|
|
void *context)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_pkg_info *info = (struct acpi_pkg_info *) context;
|
|
acpi_size object_space;
|
|
|
|
|
|
switch (object_type) {
|
|
case ACPI_COPY_TYPE_SIMPLE:
|
|
|
|
/*
|
|
* Simple object - just get the size (Null object/entry is handled
|
|
* here also) and sum it into the running package length
|
|
*/
|
|
status = acpi_ut_get_simple_object_size (source_object, &object_space);
|
|
if (ACPI_FAILURE (status)) {
|
|
return (status);
|
|
}
|
|
|
|
info->length += object_space;
|
|
break;
|
|
|
|
|
|
case ACPI_COPY_TYPE_PACKAGE:
|
|
|
|
/* Package object - nothing much to do here, let the walk handle it */
|
|
|
|
info->num_packages++;
|
|
state->pkg.this_target_obj = NULL;
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
/* No other types allowed */
|
|
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_package_object_size
|
|
*
|
|
* PARAMETERS: *internal_object - Pointer to the object we are examining
|
|
* *obj_length - Where the length is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain a package object for return to an external user.
|
|
*
|
|
* This is moderately complex since a package contains other
|
|
* objects including packages.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_package_object_size (
|
|
union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_pkg_info info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR ("ut_get_package_object_size", internal_object);
|
|
|
|
|
|
info.length = 0;
|
|
info.object_space = 0;
|
|
info.num_packages = 1;
|
|
|
|
status = acpi_ut_walk_package_tree (internal_object, NULL,
|
|
acpi_ut_get_element_length, &info);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
/*
|
|
* We have handled all of the objects in all levels of the package.
|
|
* just add the length of the package objects themselves.
|
|
* Round up to the next machine word.
|
|
*/
|
|
info.length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (union acpi_object)) *
|
|
(acpi_size) info.num_packages;
|
|
|
|
/* Return the total package length */
|
|
|
|
*obj_length = info.length;
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_get_object_size
|
|
*
|
|
* PARAMETERS: *internal_object - Pointer to the object we are examining
|
|
* *obj_length - Where the length will be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: This function is called to determine the space required to
|
|
* contain an object for return to an API user.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ut_get_object_size(
|
|
union acpi_operand_object *internal_object,
|
|
acpi_size *obj_length)
|
|
{
|
|
acpi_status status;
|
|
|
|
|
|
ACPI_FUNCTION_ENTRY ();
|
|
|
|
|
|
if ((ACPI_GET_DESCRIPTOR_TYPE (internal_object) == ACPI_DESC_TYPE_OPERAND) &&
|
|
(ACPI_GET_OBJECT_TYPE (internal_object) == ACPI_TYPE_PACKAGE)) {
|
|
status = acpi_ut_get_package_object_size (internal_object, obj_length);
|
|
}
|
|
else {
|
|
status = acpi_ut_get_simple_object_size (internal_object, obj_length);
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
|