1066 строки
30 KiB
C
1066 строки
30 KiB
C
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/******************************************************************************
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*
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* Module Name: nspredef - Validation of ACPI predefined methods and objects
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* $Revision: 1.1 $
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2008, Intel Corp.
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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/accommon.h>
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#include <acpi/acnamesp.h>
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#include <acpi/acpredef.h>
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nspredef")
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/*******************************************************************************
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*
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* This module validates predefined ACPI objects that appear in the namespace,
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* at the time they are evaluated (via acpi_evaluate_object). The purpose of this
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* validation is to detect problems with BIOS-exposed predefined ACPI objects
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* before the results are returned to the ACPI-related drivers.
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*
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* There are several areas that are validated:
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*
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* 1) The number of input arguments as defined by the method/object in the
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* ASL is validated against the ACPI specification.
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* 2) The type of the return object (if any) is validated against the ACPI
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* specification.
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* 3) For returned package objects, the count of package elements is
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* validated, as well as the type of each package element. Nested
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* packages are supported.
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*
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* For any problems found, a warning message is issued.
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*
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******************************************************************************/
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/* Local prototypes */
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static acpi_status
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acpi_ns_check_package(char *pathname,
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union acpi_operand_object **return_object_ptr,
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const union acpi_predefined_info *predefined);
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static acpi_status
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acpi_ns_check_package_elements(char *pathname,
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union acpi_operand_object **elements,
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u8 type1, u32 count1, u8 type2, u32 count2);
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static acpi_status
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acpi_ns_check_object_type(char *pathname,
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union acpi_operand_object **return_object_ptr,
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u32 expected_btypes, u32 package_index);
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static acpi_status
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acpi_ns_check_reference(char *pathname,
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union acpi_operand_object *return_object);
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static acpi_status
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acpi_ns_repair_object(u32 expected_btypes,
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u32 package_index,
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union acpi_operand_object **return_object_ptr);
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/*
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* Names for the types that can be returned by the predefined objects.
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* Used for warning messages. Must be in the same order as the ACPI_RTYPEs
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*/
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static const char *acpi_rtype_names[] = {
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"/Integer",
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"/String",
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"/Buffer",
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"/Package",
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"/Reference",
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};
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#define ACPI_NOT_PACKAGE ACPI_UINT32_MAX
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_predefined_names
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*
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* PARAMETERS: Node - Namespace node for the method/object
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* return_object_ptr - Pointer to the object returned from the
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* evaluation of a method or object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check an ACPI name for a match in the predefined name list.
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*
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******************************************************************************/
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acpi_status
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acpi_ns_check_predefined_names(struct acpi_namespace_node *node,
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u32 user_param_count,
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acpi_status return_status,
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union acpi_operand_object **return_object_ptr)
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{
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union acpi_operand_object *return_object = *return_object_ptr;
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acpi_status status = AE_OK;
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const union acpi_predefined_info *predefined;
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char *pathname;
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/* Match the name for this method/object against the predefined list */
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predefined = acpi_ns_check_for_predefined_name(node);
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/* Get the full pathname to the object, for use in error messages */
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pathname = acpi_ns_get_external_pathname(node);
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if (!pathname) {
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pathname = ACPI_CAST_PTR(char, predefined->info.name);
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}
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/*
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* Check that the parameter count for this method matches the ASL
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* definition. For predefined names, ensure that both the caller and
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* the method itself are in accordance with the ACPI specification.
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*/
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acpi_ns_check_parameter_count(pathname, node, user_param_count,
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predefined);
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/* If not a predefined name, we cannot validate the return object */
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if (!predefined) {
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goto exit;
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}
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/* If the method failed, we cannot validate the return object */
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if ((return_status != AE_OK) && (return_status != AE_CTRL_RETURN_VALUE)) {
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goto exit;
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}
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/*
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* Only validate the return value on the first successful evaluation of
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* the method. This ensures that any warnings will only be emitted during
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* the very first evaluation of the method/object.
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*/
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if (node->flags & ANOBJ_EVALUATED) {
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goto exit;
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}
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/* Mark the node as having been successfully evaluated */
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node->flags |= ANOBJ_EVALUATED;
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/*
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* If there is no return value, check if we require a return value for
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* this predefined name. Either one return value is expected, or none,
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* for both methods and other objects.
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*
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* Exit now if there is no return object. Warning if one was expected.
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*/
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if (!return_object) {
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if ((predefined->info.expected_btypes) &&
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(!(predefined->info.expected_btypes & ACPI_RTYPE_NONE))) {
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ACPI_ERROR((AE_INFO,
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"%s: Missing expected return value",
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pathname));
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status = AE_AML_NO_RETURN_VALUE;
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}
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goto exit;
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}
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/*
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* We have a return value, but if one wasn't expected, just exit, this is
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* not a problem
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*
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* For example, if the "Implicit Return" feature is enabled, methods will
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* always return a value
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*/
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if (!predefined->info.expected_btypes) {
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goto exit;
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}
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/*
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* Check that the type of the return object is what is expected for
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* this predefined name
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*/
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status = acpi_ns_check_object_type(pathname, return_object_ptr,
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predefined->info.expected_btypes,
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ACPI_NOT_PACKAGE);
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if (ACPI_FAILURE(status)) {
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goto exit;
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}
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/* For returned Package objects, check the type of all sub-objects */
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if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_PACKAGE) {
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status =
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acpi_ns_check_package(pathname, return_object_ptr,
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predefined);
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}
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exit:
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if (pathname != predefined->info.name) {
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ACPI_FREE(pathname);
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}
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_parameter_count
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*
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* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
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* Node - Namespace node for the method/object
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* user_param_count - Number of args passed in by the caller
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* Predefined - Pointer to entry in predefined name table
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*
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* RETURN: None
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*
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* DESCRIPTION: Check that the declared (in ASL/AML) parameter count for a
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* predefined name is what is expected (i.e., what is defined in
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* the ACPI specification for this predefined name.)
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*
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******************************************************************************/
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void
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acpi_ns_check_parameter_count(char *pathname,
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struct acpi_namespace_node *node,
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u32 user_param_count,
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const union acpi_predefined_info *predefined)
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{
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u32 param_count;
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u32 required_params_current;
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u32 required_params_old;
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/* Methods have 0-7 parameters. All other types have zero. */
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param_count = 0;
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if (node->type == ACPI_TYPE_METHOD) {
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param_count = node->object->method.param_count;
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}
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/* Argument count check for non-predefined methods/objects */
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if (!predefined) {
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/*
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* Warning if too few or too many arguments have been passed by the
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* caller. An incorrect number of arguments may not cause the method
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* to fail. However, the method will fail if there are too few
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* arguments and the method attempts to use one of the missing ones.
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*/
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if (user_param_count < param_count) {
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ACPI_WARNING((AE_INFO,
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"%s: Insufficient arguments - needs %d, found %d",
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pathname, param_count, user_param_count));
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} else if (user_param_count > param_count) {
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ACPI_WARNING((AE_INFO,
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"%s: Excess arguments - needs %d, found %d",
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pathname, param_count, user_param_count));
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}
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return;
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}
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/* Allow two different legal argument counts (_SCP, etc.) */
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required_params_current = predefined->info.param_count & 0x0F;
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required_params_old = predefined->info.param_count >> 4;
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if (user_param_count != ACPI_UINT32_MAX) {
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/* Validate the user-supplied parameter count */
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if ((user_param_count != required_params_current) &&
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(user_param_count != required_params_old)) {
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ACPI_WARNING((AE_INFO,
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"%s: Parameter count mismatch - caller passed %d, ACPI requires %d",
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pathname, user_param_count,
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required_params_current));
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}
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}
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/*
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* Only validate the argument count on the first successful evaluation of
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* the method. This ensures that any warnings will only be emitted during
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* the very first evaluation of the method/object.
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*/
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if (node->flags & ANOBJ_EVALUATED) {
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return;
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}
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/*
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* Check that the ASL-defined parameter count is what is expected for
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* this predefined name.
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*/
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if ((param_count != required_params_current) &&
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(param_count != required_params_old)) {
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ACPI_WARNING((AE_INFO,
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"%s: Parameter count mismatch - ASL declared %d, ACPI requires %d",
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pathname, param_count, required_params_current));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_for_predefined_name
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*
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* PARAMETERS: Node - Namespace node for the method/object
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*
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* RETURN: Pointer to entry in predefined table. NULL indicates not found.
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*
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* DESCRIPTION: Check an object name against the predefined object list.
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*
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******************************************************************************/
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const union acpi_predefined_info *acpi_ns_check_for_predefined_name(struct
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acpi_namespace_node
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*node)
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{
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const union acpi_predefined_info *this_name;
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/* Quick check for a predefined name, first character must be underscore */
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if (node->name.ascii[0] != '_') {
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return (NULL);
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}
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/* Search info table for a predefined method/object name */
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this_name = predefined_names;
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while (this_name->info.name[0]) {
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if (ACPI_COMPARE_NAME(node->name.ascii, this_name->info.name)) {
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/* Return pointer to this table entry */
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return (this_name);
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}
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/*
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* Skip next entry in the table if this name returns a Package
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* (next entry contains the package info)
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*/
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if (this_name->info.expected_btypes & ACPI_RTYPE_PACKAGE) {
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this_name++;
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}
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this_name++;
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}
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return (NULL);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_package
|
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*
|
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* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
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* return_object_ptr - Pointer to the object returned from the
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* evaluation of a method or object
|
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* Predefined - Pointer to entry in predefined name table
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*
|
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* RETURN: Status
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*
|
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* DESCRIPTION: Check a returned package object for the correct count and
|
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* correct type of all sub-objects.
|
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*
|
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******************************************************************************/
|
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|
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static acpi_status
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acpi_ns_check_package(char *pathname,
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union acpi_operand_object **return_object_ptr,
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const union acpi_predefined_info *predefined)
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{
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union acpi_operand_object *return_object = *return_object_ptr;
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const union acpi_predefined_info *package;
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union acpi_operand_object *sub_package;
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union acpi_operand_object **elements;
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union acpi_operand_object **sub_elements;
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acpi_status status;
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u32 expected_count;
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u32 count;
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u32 i;
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u32 j;
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|
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ACPI_FUNCTION_NAME(ns_check_package);
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/* The package info for this name is in the next table entry */
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package = predefined + 1;
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|
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ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
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"%s Validating return Package of Type %X, Count %X\n",
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pathname, package->ret_info.type,
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return_object->package.count));
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|
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/* Extract package count and elements array */
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|
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elements = return_object->package.elements;
|
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count = return_object->package.count;
|
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|
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/* The package must have at least one element, else invalid */
|
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|
|
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if (!count) {
|
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ACPI_WARNING((AE_INFO,
|
||
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"%s: Return Package has no elements (empty)",
|
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pathname));
|
||
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|
||
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return (AE_AML_OPERAND_VALUE);
|
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}
|
||
|
|
||
|
/*
|
||
|
* Decode the type of the expected package contents
|
||
|
*
|
||
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* PTYPE1 packages contain no subpackages
|
||
|
* PTYPE2 packages contain sub-packages
|
||
|
*/
|
||
|
switch (package->ret_info.type) {
|
||
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case ACPI_PTYPE1_FIXED:
|
||
|
|
||
|
/*
|
||
|
* The package count is fixed and there are no sub-packages
|
||
|
*
|
||
|
* If package is too small, exit.
|
||
|
* If package is larger than expected, issue warning but continue
|
||
|
*/
|
||
|
expected_count =
|
||
|
package->ret_info.count1 + package->ret_info.count2;
|
||
|
if (count < expected_count) {
|
||
|
goto package_too_small;
|
||
|
} else if (count > expected_count) {
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Return Package is larger than needed - "
|
||
|
"found %u, expected %u", pathname, count,
|
||
|
expected_count));
|
||
|
}
|
||
|
|
||
|
/* Validate all elements of the returned package */
|
||
|
|
||
|
status = acpi_ns_check_package_elements(pathname, elements,
|
||
|
package->ret_info.
|
||
|
object_type1,
|
||
|
package->ret_info.
|
||
|
count1,
|
||
|
package->ret_info.
|
||
|
object_type2,
|
||
|
package->ret_info.
|
||
|
count2);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE1_VAR:
|
||
|
|
||
|
/*
|
||
|
* The package count is variable, there are no sub-packages, and all
|
||
|
* elements must be of the same type
|
||
|
*/
|
||
|
for (i = 0; i < count; i++) {
|
||
|
status = acpi_ns_check_object_type(pathname, elements,
|
||
|
package->ret_info.
|
||
|
object_type1, i);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
elements++;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE1_OPTION:
|
||
|
|
||
|
/*
|
||
|
* The package count is variable, there are no sub-packages. There are
|
||
|
* a fixed number of required elements, and a variable number of
|
||
|
* optional elements.
|
||
|
*
|
||
|
* Check if package is at least as large as the minimum required
|
||
|
*/
|
||
|
expected_count = package->ret_info3.count;
|
||
|
if (count < expected_count) {
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
/* Variable number of sub-objects */
|
||
|
|
||
|
for (i = 0; i < count; i++) {
|
||
|
if (i < package->ret_info3.count) {
|
||
|
|
||
|
/* These are the required package elements (0, 1, or 2) */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_object_type(pathname,
|
||
|
elements,
|
||
|
package->
|
||
|
ret_info3.
|
||
|
object_type[i],
|
||
|
i);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
} else {
|
||
|
/* These are the optional package elements */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_object_type(pathname,
|
||
|
elements,
|
||
|
package->
|
||
|
ret_info3.
|
||
|
tail_object_type,
|
||
|
i);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
}
|
||
|
elements++;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE2_PKG_COUNT:
|
||
|
|
||
|
/* First element is the (Integer) count of sub-packages to follow */
|
||
|
|
||
|
status = acpi_ns_check_object_type(pathname, elements,
|
||
|
ACPI_RTYPE_INTEGER, 0);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Count cannot be larger than the parent package length, but allow it
|
||
|
* to be smaller. The >= accounts for the Integer above.
|
||
|
*/
|
||
|
expected_count = (u32) (*elements)->integer.value;
|
||
|
if (expected_count >= count) {
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
count = expected_count;
|
||
|
elements++;
|
||
|
|
||
|
/* Now we can walk the sub-packages */
|
||
|
|
||
|
/*lint -fallthrough */
|
||
|
|
||
|
case ACPI_PTYPE2:
|
||
|
case ACPI_PTYPE2_FIXED:
|
||
|
case ACPI_PTYPE2_MIN:
|
||
|
case ACPI_PTYPE2_COUNT:
|
||
|
|
||
|
/*
|
||
|
* These types all return a single package that consists of a variable
|
||
|
* number of sub-packages
|
||
|
*/
|
||
|
for (i = 0; i < count; i++) {
|
||
|
sub_package = *elements;
|
||
|
sub_elements = sub_package->package.elements;
|
||
|
|
||
|
/* Each sub-object must be of type Package */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_object_type(pathname, &sub_package,
|
||
|
ACPI_RTYPE_PACKAGE, i);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
|
||
|
/* Examine the different types of sub-packages */
|
||
|
|
||
|
switch (package->ret_info.type) {
|
||
|
case ACPI_PTYPE2:
|
||
|
case ACPI_PTYPE2_PKG_COUNT:
|
||
|
|
||
|
/* Each subpackage has a fixed number of elements */
|
||
|
|
||
|
expected_count =
|
||
|
package->ret_info.count1 +
|
||
|
package->ret_info.count2;
|
||
|
if (sub_package->package.count !=
|
||
|
expected_count) {
|
||
|
count = sub_package->package.count;
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_package_elements(pathname,
|
||
|
sub_elements,
|
||
|
package->
|
||
|
ret_info.
|
||
|
object_type1,
|
||
|
package->
|
||
|
ret_info.
|
||
|
count1,
|
||
|
package->
|
||
|
ret_info.
|
||
|
object_type2,
|
||
|
package->
|
||
|
ret_info.
|
||
|
count2);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE2_FIXED:
|
||
|
|
||
|
/* Each sub-package has a fixed length */
|
||
|
|
||
|
expected_count = package->ret_info2.count;
|
||
|
if (sub_package->package.count < expected_count) {
|
||
|
count = sub_package->package.count;
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
/* Check the type of each sub-package element */
|
||
|
|
||
|
for (j = 0; j < expected_count; j++) {
|
||
|
status =
|
||
|
acpi_ns_check_object_type(pathname,
|
||
|
&sub_elements[j],
|
||
|
package->ret_info2.object_type[j], j);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE2_MIN:
|
||
|
|
||
|
/* Each sub-package has a variable but minimum length */
|
||
|
|
||
|
expected_count = package->ret_info.count1;
|
||
|
if (sub_package->package.count < expected_count) {
|
||
|
count = sub_package->package.count;
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
/* Check the type of each sub-package element */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_package_elements(pathname,
|
||
|
sub_elements,
|
||
|
package->
|
||
|
ret_info.
|
||
|
object_type1,
|
||
|
sub_package->
|
||
|
package.
|
||
|
count, 0, 0);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case ACPI_PTYPE2_COUNT:
|
||
|
|
||
|
/* First element is the (Integer) count of elements to follow */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_object_type(pathname,
|
||
|
sub_elements,
|
||
|
ACPI_RTYPE_INTEGER,
|
||
|
0);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
|
||
|
/* Make sure package is large enough for the Count */
|
||
|
|
||
|
expected_count =
|
||
|
(u32) (*sub_elements)->integer.value;
|
||
|
if (sub_package->package.count < expected_count) {
|
||
|
count = sub_package->package.count;
|
||
|
goto package_too_small;
|
||
|
}
|
||
|
|
||
|
/* Check the type of each sub-package element */
|
||
|
|
||
|
status =
|
||
|
acpi_ns_check_package_elements(pathname,
|
||
|
(sub_elements
|
||
|
+ 1),
|
||
|
package->
|
||
|
ret_info.
|
||
|
object_type1,
|
||
|
(expected_count
|
||
|
- 1), 0, 0);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
elements++;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
|
||
|
/* Should not get here if predefined info table is correct */
|
||
|
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Invalid internal return type in table entry: %X",
|
||
|
pathname, package->ret_info.type));
|
||
|
|
||
|
return (AE_AML_INTERNAL);
|
||
|
}
|
||
|
|
||
|
return (AE_OK);
|
||
|
|
||
|
package_too_small:
|
||
|
|
||
|
/* Error exit for the case with an incorrect package count */
|
||
|
|
||
|
ACPI_WARNING((AE_INFO, "%s: Return Package is too small - "
|
||
|
"found %u, expected %u", pathname, count,
|
||
|
expected_count));
|
||
|
|
||
|
return (AE_AML_OPERAND_VALUE);
|
||
|
}
|
||
|
|
||
|
/*******************************************************************************
|
||
|
*
|
||
|
* FUNCTION: acpi_ns_check_package_elements
|
||
|
*
|
||
|
* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
|
||
|
* Elements - Pointer to the package elements array
|
||
|
* Type1 - Object type for first group
|
||
|
* Count1 - Count for first group
|
||
|
* Type2 - Object type for second group
|
||
|
* Count2 - Count for second group
|
||
|
*
|
||
|
* RETURN: Status
|
||
|
*
|
||
|
* DESCRIPTION: Check that all elements of a package are of the correct object
|
||
|
* type. Supports up to two groups of different object types.
|
||
|
*
|
||
|
******************************************************************************/
|
||
|
|
||
|
static acpi_status
|
||
|
acpi_ns_check_package_elements(char *pathname,
|
||
|
union acpi_operand_object **elements,
|
||
|
u8 type1, u32 count1, u8 type2, u32 count2)
|
||
|
{
|
||
|
union acpi_operand_object **this_element = elements;
|
||
|
acpi_status status;
|
||
|
u32 i;
|
||
|
|
||
|
/*
|
||
|
* Up to two groups of package elements are supported by the data
|
||
|
* structure. All elements in each group must be of the same type.
|
||
|
* The second group can have a count of zero.
|
||
|
*/
|
||
|
for (i = 0; i < count1; i++) {
|
||
|
status = acpi_ns_check_object_type(pathname, this_element,
|
||
|
type1, i);
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
this_element++;
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < count2; i++) {
|
||
|
status = acpi_ns_check_object_type(pathname, this_element,
|
||
|
type2, (i + count1));
|
||
|
if (ACPI_FAILURE(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
this_element++;
|
||
|
}
|
||
|
|
||
|
return (AE_OK);
|
||
|
}
|
||
|
|
||
|
/*******************************************************************************
|
||
|
*
|
||
|
* FUNCTION: acpi_ns_check_object_type
|
||
|
*
|
||
|
* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
|
||
|
* return_object_ptr - Pointer to the object returned from the
|
||
|
* evaluation of a method or object
|
||
|
* expected_btypes - Bitmap of expected return type(s)
|
||
|
* package_index - Index of object within parent package (if
|
||
|
* applicable - ACPI_NOT_PACKAGE otherwise)
|
||
|
*
|
||
|
* RETURN: Status
|
||
|
*
|
||
|
* DESCRIPTION: Check the type of the return object against the expected object
|
||
|
* type(s). Use of Btype allows multiple expected object types.
|
||
|
*
|
||
|
******************************************************************************/
|
||
|
|
||
|
static acpi_status
|
||
|
acpi_ns_check_object_type(char *pathname,
|
||
|
union acpi_operand_object **return_object_ptr,
|
||
|
u32 expected_btypes, u32 package_index)
|
||
|
{
|
||
|
union acpi_operand_object *return_object = *return_object_ptr;
|
||
|
acpi_status status = AE_OK;
|
||
|
u32 return_btype;
|
||
|
char type_buffer[48]; /* Room for 5 types */
|
||
|
u32 this_rtype;
|
||
|
u32 i;
|
||
|
u32 j;
|
||
|
|
||
|
/*
|
||
|
* If we get a NULL return_object here, it is a NULL package element,
|
||
|
* and this is always an error.
|
||
|
*/
|
||
|
if (!return_object) {
|
||
|
goto type_error_exit;
|
||
|
}
|
||
|
|
||
|
/* A Namespace node should not get here, but make sure */
|
||
|
|
||
|
if (ACPI_GET_DESCRIPTOR_TYPE(return_object) == ACPI_DESC_TYPE_NAMED) {
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Invalid return type - Found a Namespace node [%4.4s] type %s",
|
||
|
pathname, return_object->node.name.ascii,
|
||
|
acpi_ut_get_type_name(return_object->node.type)));
|
||
|
return (AE_AML_OPERAND_TYPE);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Convert the object type (ACPI_TYPE_xxx) to a bitmapped object type.
|
||
|
* The bitmapped type allows multiple possible return types.
|
||
|
*
|
||
|
* Note, the cases below must handle all of the possible types returned
|
||
|
* from all of the predefined names (including elements of returned
|
||
|
* packages)
|
||
|
*/
|
||
|
switch (ACPI_GET_OBJECT_TYPE(return_object)) {
|
||
|
case ACPI_TYPE_INTEGER:
|
||
|
return_btype = ACPI_RTYPE_INTEGER;
|
||
|
break;
|
||
|
|
||
|
case ACPI_TYPE_BUFFER:
|
||
|
return_btype = ACPI_RTYPE_BUFFER;
|
||
|
break;
|
||
|
|
||
|
case ACPI_TYPE_STRING:
|
||
|
return_btype = ACPI_RTYPE_STRING;
|
||
|
break;
|
||
|
|
||
|
case ACPI_TYPE_PACKAGE:
|
||
|
return_btype = ACPI_RTYPE_PACKAGE;
|
||
|
break;
|
||
|
|
||
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
||
|
return_btype = ACPI_RTYPE_REFERENCE;
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
/* Not one of the supported objects, must be incorrect */
|
||
|
|
||
|
goto type_error_exit;
|
||
|
}
|
||
|
|
||
|
/* Is the object one of the expected types? */
|
||
|
|
||
|
if (!(return_btype & expected_btypes)) {
|
||
|
|
||
|
/* Type mismatch -- attempt repair of the returned object */
|
||
|
|
||
|
status = acpi_ns_repair_object(expected_btypes, package_index,
|
||
|
return_object_ptr);
|
||
|
if (ACPI_SUCCESS(status)) {
|
||
|
return (status);
|
||
|
}
|
||
|
goto type_error_exit;
|
||
|
}
|
||
|
|
||
|
/* For reference objects, check that the reference type is correct */
|
||
|
|
||
|
if (ACPI_GET_OBJECT_TYPE(return_object) == ACPI_TYPE_LOCAL_REFERENCE) {
|
||
|
status = acpi_ns_check_reference(pathname, return_object);
|
||
|
}
|
||
|
|
||
|
return (status);
|
||
|
|
||
|
type_error_exit:
|
||
|
|
||
|
/* Create a string with all expected types for this predefined object */
|
||
|
|
||
|
j = 1;
|
||
|
type_buffer[0] = 0;
|
||
|
this_rtype = ACPI_RTYPE_INTEGER;
|
||
|
|
||
|
for (i = 0; i < ACPI_NUM_RTYPES; i++) {
|
||
|
|
||
|
/* If one of the expected types, concatenate the name of this type */
|
||
|
|
||
|
if (expected_btypes & this_rtype) {
|
||
|
ACPI_STRCAT(type_buffer, &acpi_rtype_names[i][j]);
|
||
|
j = 0; /* Use name separator from now on */
|
||
|
}
|
||
|
this_rtype <<= 1; /* Next Rtype */
|
||
|
}
|
||
|
|
||
|
if (package_index == ACPI_NOT_PACKAGE) {
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Return type mismatch - found %s, expected %s",
|
||
|
pathname,
|
||
|
acpi_ut_get_object_type_name(return_object),
|
||
|
type_buffer));
|
||
|
} else {
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Return Package type mismatch at index %u - "
|
||
|
"found %s, expected %s", pathname, package_index,
|
||
|
acpi_ut_get_object_type_name(return_object),
|
||
|
type_buffer));
|
||
|
}
|
||
|
|
||
|
return (AE_AML_OPERAND_TYPE);
|
||
|
}
|
||
|
|
||
|
/*******************************************************************************
|
||
|
*
|
||
|
* FUNCTION: acpi_ns_check_reference
|
||
|
*
|
||
|
* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
|
||
|
* return_object - Object returned from the evaluation of a
|
||
|
* method or object
|
||
|
*
|
||
|
* RETURN: Status
|
||
|
*
|
||
|
* DESCRIPTION: Check a returned reference object for the correct reference
|
||
|
* type. The only reference type that can be returned from a
|
||
|
* predefined method is a named reference. All others are invalid.
|
||
|
*
|
||
|
******************************************************************************/
|
||
|
|
||
|
static acpi_status
|
||
|
acpi_ns_check_reference(char *pathname,
|
||
|
union acpi_operand_object *return_object)
|
||
|
{
|
||
|
|
||
|
/*
|
||
|
* Check the reference object for the correct reference type (opcode).
|
||
|
* The only type of reference that can be converted to an union acpi_object is
|
||
|
* a reference to a named object (reference class: NAME)
|
||
|
*/
|
||
|
if (return_object->reference.class == ACPI_REFCLASS_NAME) {
|
||
|
return (AE_OK);
|
||
|
}
|
||
|
|
||
|
ACPI_WARNING((AE_INFO,
|
||
|
"%s: Return type mismatch - unexpected reference object type [%s] %2.2X",
|
||
|
pathname, acpi_ut_get_reference_name(return_object),
|
||
|
return_object->reference.class));
|
||
|
|
||
|
return (AE_AML_OPERAND_TYPE);
|
||
|
}
|
||
|
|
||
|
/*******************************************************************************
|
||
|
*
|
||
|
* FUNCTION: acpi_ns_repair_object
|
||
|
*
|
||
|
* PARAMETERS: Pathname - Full pathname to the node (for error msgs)
|
||
|
* package_index - Used to determine if target is in a package
|
||
|
* return_object_ptr - Pointer to the object returned from the
|
||
|
* evaluation of a method or object
|
||
|
*
|
||
|
* RETURN: Status. AE_OK if repair was successful.
|
||
|
*
|
||
|
* DESCRIPTION: Attempt to repair/convert a return object of a type that was
|
||
|
* not expected.
|
||
|
*
|
||
|
******************************************************************************/
|
||
|
|
||
|
static acpi_status
|
||
|
acpi_ns_repair_object(u32 expected_btypes,
|
||
|
u32 package_index,
|
||
|
union acpi_operand_object **return_object_ptr)
|
||
|
{
|
||
|
union acpi_operand_object *return_object = *return_object_ptr;
|
||
|
union acpi_operand_object *new_object;
|
||
|
acpi_size length;
|
||
|
|
||
|
switch (ACPI_GET_OBJECT_TYPE(return_object)) {
|
||
|
case ACPI_TYPE_BUFFER:
|
||
|
|
||
|
if (!(expected_btypes & ACPI_RTYPE_STRING)) {
|
||
|
return (AE_AML_OPERAND_TYPE);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Have a Buffer, expected a String, convert. Use a to_string
|
||
|
* conversion, no transform performed on the buffer data. The best
|
||
|
* example of this is the _BIF method, where the string data from
|
||
|
* the battery is often (incorrectly) returned as buffer object(s).
|
||
|
*/
|
||
|
length = 0;
|
||
|
while ((length < return_object->buffer.length) &&
|
||
|
(return_object->buffer.pointer[length])) {
|
||
|
length++;
|
||
|
}
|
||
|
|
||
|
/* Allocate a new string object */
|
||
|
|
||
|
new_object = acpi_ut_create_string_object(length);
|
||
|
if (!new_object) {
|
||
|
return (AE_NO_MEMORY);
|
||
|
}
|
||
|
|
||
|
/*
|
||
|
* Copy the raw buffer data with no transform. String is already NULL
|
||
|
* terminated at Length+1.
|
||
|
*/
|
||
|
ACPI_MEMCPY(new_object->string.pointer,
|
||
|
return_object->buffer.pointer, length);
|
||
|
|
||
|
/* Install the new return object */
|
||
|
|
||
|
acpi_ut_remove_reference(return_object);
|
||
|
*return_object_ptr = new_object;
|
||
|
|
||
|
/*
|
||
|
* If the object is a package element, we need to:
|
||
|
* 1. Decrement the reference count of the orignal object, it was
|
||
|
* incremented when building the package
|
||
|
* 2. Increment the reference count of the new object, it will be
|
||
|
* decremented when releasing the package
|
||
|
*/
|
||
|
if (package_index != ACPI_NOT_PACKAGE) {
|
||
|
acpi_ut_remove_reference(return_object);
|
||
|
acpi_ut_add_reference(new_object);
|
||
|
}
|
||
|
return (AE_OK);
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
return (AE_AML_OPERAND_TYPE);
|
||
|
}
|