83dd450445
In the routine acpi_ut_create_package_object(), if the ACPI_ALLOCATE_ZEROED() fails then ACPI_FREE(package_desc) is called as part of the cleanup. This should instead be acpi_ut_remove_reference(package_desc) in order to remove the reference acquired from acpi_ut_create_internal_object() [see the routine acpi_ut_create_buffer_object() as an example of proper functionality]. Signed-off-by: Myron Stowe <myron.stowe@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
667 lines
19 KiB
C
667 lines
19 KiB
C
/******************************************************************************
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*
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* Module Name: utobject - ACPI object create/delete/size/cache routines
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2007, R. Byron Moore
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include <acpi/acnamesp.h>
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#include <acpi/amlcode.h>
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utobject")
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/* Local prototypes */
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static acpi_status
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acpi_ut_get_simple_object_size(union acpi_operand_object *obj,
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acpi_size * obj_length);
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static acpi_status
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acpi_ut_get_package_object_size(union acpi_operand_object *obj,
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acpi_size * obj_length);
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static acpi_status
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acpi_ut_get_element_length(u8 object_type,
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union acpi_operand_object *source_object,
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union acpi_generic_state *state, void *context);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_internal_object_dbg
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*
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* PARAMETERS: module_name - Source file name of caller
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* line_number - Line number of caller
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* component_id - Component type of caller
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* Type - ACPI Type of the new object
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*
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* RETURN: A new internal object, null on failure
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*
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* DESCRIPTION: Create and initialize a new internal object.
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*
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* NOTE: We always allocate the worst-case object descriptor because
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* these objects are cached, and we want them to be
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* one-size-satisifies-any-request. This in itself may not be
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* the most memory efficient, but the efficiency of the object
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* cache should more than make up for this!
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*
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******************************************************************************/
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union acpi_operand_object *acpi_ut_create_internal_object_dbg(char *module_name,
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u32 line_number,
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u32 component_id,
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acpi_object_type
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type)
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{
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union acpi_operand_object *object;
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union acpi_operand_object *second_object;
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ACPI_FUNCTION_TRACE_STR(ut_create_internal_object_dbg,
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acpi_ut_get_type_name(type));
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/* Allocate the raw object descriptor */
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object =
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acpi_ut_allocate_object_desc_dbg(module_name, line_number,
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component_id);
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if (!object) {
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return_PTR(NULL);
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}
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switch (type) {
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case ACPI_TYPE_REGION:
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case ACPI_TYPE_BUFFER_FIELD:
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/* These types require a secondary object */
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second_object = acpi_ut_allocate_object_desc_dbg(module_name,
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line_number,
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component_id);
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if (!second_object) {
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acpi_ut_delete_object_desc(object);
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return_PTR(NULL);
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}
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second_object->common.type = ACPI_TYPE_LOCAL_EXTRA;
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second_object->common.reference_count = 1;
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/* Link the second object to the first */
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object->common.next_object = second_object;
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break;
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default:
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/* All others have no secondary object */
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break;
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}
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/* Save the object type in the object descriptor */
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object->common.type = (u8) type;
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/* Init the reference count */
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object->common.reference_count = 1;
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/* Any per-type initialization should go here */
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return_PTR(object);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_package_object
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*
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* PARAMETERS: Count - Number of package elements
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*
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* RETURN: Pointer to a new Package object, null on failure
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*
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* DESCRIPTION: Create a fully initialized package object
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*
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******************************************************************************/
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union acpi_operand_object *acpi_ut_create_package_object(u32 count)
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{
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union acpi_operand_object *package_desc;
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union acpi_operand_object **package_elements;
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ACPI_FUNCTION_TRACE_U32(ut_create_package_object, count);
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/* Create a new Package object */
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package_desc = acpi_ut_create_internal_object(ACPI_TYPE_PACKAGE);
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if (!package_desc) {
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return_PTR(NULL);
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}
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/*
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* Create the element array. Count+1 allows the array to be null
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* terminated.
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*/
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package_elements = ACPI_ALLOCATE_ZEROED((acpi_size)
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(count + 1) * sizeof(void *));
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if (!package_elements) {
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acpi_ut_remove_reference(package_desc);
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return_PTR(NULL);
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}
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package_desc->package.count = count;
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package_desc->package.elements = package_elements;
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return_PTR(package_desc);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_buffer_object
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*
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* PARAMETERS: buffer_size - Size of buffer to be created
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*
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* RETURN: Pointer to a new Buffer object, null on failure
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*
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* DESCRIPTION: Create a fully initialized buffer object
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*
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******************************************************************************/
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union acpi_operand_object *acpi_ut_create_buffer_object(acpi_size buffer_size)
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{
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union acpi_operand_object *buffer_desc;
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u8 *buffer = NULL;
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ACPI_FUNCTION_TRACE_U32(ut_create_buffer_object, buffer_size);
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/* Create a new Buffer object */
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buffer_desc = acpi_ut_create_internal_object(ACPI_TYPE_BUFFER);
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if (!buffer_desc) {
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return_PTR(NULL);
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}
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/* Create an actual buffer only if size > 0 */
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if (buffer_size > 0) {
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/* Allocate the actual buffer */
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buffer = ACPI_ALLOCATE_ZEROED(buffer_size);
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if (!buffer) {
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ACPI_ERROR((AE_INFO, "Could not allocate size %X",
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(u32) buffer_size));
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acpi_ut_remove_reference(buffer_desc);
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return_PTR(NULL);
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}
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}
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/* Complete buffer object initialization */
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buffer_desc->buffer.flags |= AOPOBJ_DATA_VALID;
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buffer_desc->buffer.pointer = buffer;
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buffer_desc->buffer.length = (u32) buffer_size;
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/* Return the new buffer descriptor */
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return_PTR(buffer_desc);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_create_string_object
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*
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* PARAMETERS: string_size - Size of string to be created. Does not
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* include NULL terminator, this is added
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* automatically.
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*
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* RETURN: Pointer to a new String object
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*
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* DESCRIPTION: Create a fully initialized string object
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*
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******************************************************************************/
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union acpi_operand_object *acpi_ut_create_string_object(acpi_size string_size)
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{
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union acpi_operand_object *string_desc;
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char *string;
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ACPI_FUNCTION_TRACE_U32(ut_create_string_object, string_size);
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/* Create a new String object */
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string_desc = acpi_ut_create_internal_object(ACPI_TYPE_STRING);
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if (!string_desc) {
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return_PTR(NULL);
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}
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/*
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* Allocate the actual string buffer -- (Size + 1) for NULL terminator.
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* NOTE: Zero-length strings are NULL terminated
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*/
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string = ACPI_ALLOCATE_ZEROED(string_size + 1);
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if (!string) {
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ACPI_ERROR((AE_INFO, "Could not allocate size %X",
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(u32) string_size));
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acpi_ut_remove_reference(string_desc);
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return_PTR(NULL);
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}
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/* Complete string object initialization */
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string_desc->string.pointer = string;
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string_desc->string.length = (u32) string_size;
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/* Return the new string descriptor */
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return_PTR(string_desc);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_valid_internal_object
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*
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* PARAMETERS: Object - Object to be validated
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*
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* RETURN: TRUE if object is valid, FALSE otherwise
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*
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* DESCRIPTION: Validate a pointer to be an union acpi_operand_object
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*
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******************************************************************************/
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u8 acpi_ut_valid_internal_object(void *object)
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{
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ACPI_FUNCTION_NAME(ut_valid_internal_object);
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/* Check for a null pointer */
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if (!object) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO, "**** Null Object Ptr\n"));
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return (FALSE);
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}
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/* Check the descriptor type field */
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switch (ACPI_GET_DESCRIPTOR_TYPE(object)) {
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case ACPI_DESC_TYPE_OPERAND:
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/* The object appears to be a valid union acpi_operand_object */
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return (TRUE);
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default:
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"%p is not not an ACPI operand obj [%s]\n",
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object, acpi_ut_get_descriptor_name(object)));
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break;
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_allocate_object_desc_dbg
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*
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* PARAMETERS: module_name - Caller's module name (for error output)
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* line_number - Caller's line number (for error output)
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* component_id - Caller's component ID (for error output)
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*
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* RETURN: Pointer to newly allocated object descriptor. Null on error
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*
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* DESCRIPTION: Allocate a new object descriptor. Gracefully handle
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* error conditions.
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*
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******************************************************************************/
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void *acpi_ut_allocate_object_desc_dbg(char *module_name,
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u32 line_number, u32 component_id)
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{
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union acpi_operand_object *object;
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ACPI_FUNCTION_TRACE(ut_allocate_object_desc_dbg);
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object = acpi_os_acquire_object(acpi_gbl_operand_cache);
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if (!object) {
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ACPI_ERROR((module_name, line_number,
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"Could not allocate an object descriptor"));
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return_PTR(NULL);
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}
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/* Mark the descriptor type */
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memset(object, 0, sizeof(union acpi_operand_object));
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ACPI_SET_DESCRIPTOR_TYPE(object, ACPI_DESC_TYPE_OPERAND);
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
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object, (u32) sizeof(union acpi_operand_object)));
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return_PTR(object);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_object_desc
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*
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* PARAMETERS: Object - An Acpi internal object to be deleted
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*
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* RETURN: None.
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*
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* DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
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*
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******************************************************************************/
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void acpi_ut_delete_object_desc(union acpi_operand_object *object)
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{
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ACPI_FUNCTION_TRACE_PTR(ut_delete_object_desc, object);
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/* Object must be an union acpi_operand_object */
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if (ACPI_GET_DESCRIPTOR_TYPE(object) != ACPI_DESC_TYPE_OPERAND) {
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ACPI_ERROR((AE_INFO,
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"%p is not an ACPI Operand object [%s]", object,
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acpi_ut_get_descriptor_name(object)));
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return_VOID;
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}
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(void)acpi_os_release_object(acpi_gbl_operand_cache, object);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_simple_object_size
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*
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* PARAMETERS: internal_object - An ACPI operand object
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* obj_length - Where the length is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: This function is called to determine the space required to
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* contain a simple object for return to an external user.
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*
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* The length includes the object structure plus any additional
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* needed space.
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*
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******************************************************************************/
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static acpi_status
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acpi_ut_get_simple_object_size(union acpi_operand_object *internal_object,
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acpi_size * obj_length)
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{
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acpi_size length;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR(ut_get_simple_object_size, internal_object);
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/*
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* Handle a null object (Could be a uninitialized package
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* element -- which is legal)
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*/
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if (!internal_object) {
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*obj_length = 0;
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return_ACPI_STATUS(AE_OK);
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}
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/* Start with the length of the Acpi object */
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length = sizeof(union acpi_object);
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if (ACPI_GET_DESCRIPTOR_TYPE(internal_object) == ACPI_DESC_TYPE_NAMED) {
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/* Object is a named object (reference), just return the length */
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*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
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return_ACPI_STATUS(status);
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}
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/*
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* The final length depends on the object type
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* Strings and Buffers are packed right up against the parent object and
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* must be accessed bytewise or there may be alignment problems on
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* certain processors
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*/
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switch (ACPI_GET_OBJECT_TYPE(internal_object)) {
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case ACPI_TYPE_STRING:
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length += (acpi_size) internal_object->string.length + 1;
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break;
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case ACPI_TYPE_BUFFER:
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length += (acpi_size) internal_object->buffer.length;
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break;
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case ACPI_TYPE_INTEGER:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_POWER:
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/*
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* No extra data for these types
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*/
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break;
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case ACPI_TYPE_LOCAL_REFERENCE:
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switch (internal_object->reference.opcode) {
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case AML_INT_NAMEPATH_OP:
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/*
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* Get the actual length of the full pathname to this object.
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* The reference will be converted to the pathname to the object
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*/
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length +=
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ACPI_ROUND_UP_TO_NATIVE_WORD
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(acpi_ns_get_pathname_length
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(internal_object->reference.node));
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break;
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default:
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/*
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* No other reference opcodes are supported.
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* Notably, Locals and Args are not supported, but this may be
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* required eventually.
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*/
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ACPI_ERROR((AE_INFO,
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"Unsupported Reference opcode=%X in object %p",
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internal_object->reference.opcode,
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internal_object));
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status = AE_TYPE;
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break;
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}
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break;
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default:
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ACPI_ERROR((AE_INFO, "Unsupported type=%X in object %p",
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ACPI_GET_OBJECT_TYPE(internal_object),
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internal_object));
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status = AE_TYPE;
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break;
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}
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/*
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* Account for the space required by the object rounded up to the next
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* multiple of the machine word size. This keeps each object aligned
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* on a machine word boundary. (preventing alignment faults on some
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* machines.)
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*/
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*obj_length = ACPI_ROUND_UP_TO_NATIVE_WORD(length);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_get_element_length
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*
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* PARAMETERS: acpi_pkg_callback
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*
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* RETURN: Status
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*
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* DESCRIPTION: Get the length of one package element.
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*
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******************************************************************************/
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static acpi_status
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acpi_ut_get_element_length(u8 object_type,
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union acpi_operand_object *source_object,
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union acpi_generic_state *state, void *context)
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{
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acpi_status status = AE_OK;
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struct acpi_pkg_info *info = (struct acpi_pkg_info *)context;
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acpi_size object_space;
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switch (object_type) {
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case ACPI_COPY_TYPE_SIMPLE:
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/*
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* 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 - An ACPI internal object
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static 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 - An ACPI internal object
|
|
* 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);
|
|
}
|