/******************************************************************************* * * Module Name: utstate - state object support procedures * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, Intel Corp. * All rights reserved. * * 2. License * * 2.1. This is your license from Intel Corp. under its intellectual property * rights. You may have additional license terms from the party that provided * you this software, covering your right to use that party's intellectual * property rights. * * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a * copy of the source code appearing in this file ("Covered Code") an * irrevocable, perpetual, worldwide license under Intel's copyrights in the * base code distributed originally by Intel ("Original Intel Code") to copy, * make derivatives, distribute, use and display any portion of the Covered * Code in any form, with the right to sublicense such rights; and * * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent * license (with the right to sublicense), under only those claims of Intel * patents that are infringed by the Original Intel Code, to make, use, sell, * offer to sell, and import the Covered Code and derivative works thereof * solely to the minimum extent necessary to exercise the above copyright * license, and in no event shall the patent license extend to any additions * to or modifications of the Original Intel Code. No other license or right * is granted directly or by implication, estoppel or otherwise; * * The above copyright and patent license is granted only if the following * conditions are met: * * 3. Conditions * * 3.1. Redistribution of Source with Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification with rights to further distribute source must include * the above Copyright Notice, the above License, this list of Conditions, * and the following Disclaimer and Export Compliance provision. In addition, * Licensee must cause all Covered Code to which Licensee contributes to * contain a file documenting the changes Licensee made to create that Covered * Code and the date of any change. Licensee must include in that file the * documentation of any changes made by any predecessor Licensee. Licensee * must include a prominent statement that the modification is derived, * directly or indirectly, from Original Intel Code. * * 3.2. Redistribution of Source with no Rights to Further Distribute Source. * Redistribution of source code of any substantial portion of the Covered * Code or modification without rights to further distribute source must * include the following Disclaimer and Export Compliance provision in the * documentation and/or other materials provided with distribution. In * addition, Licensee may not authorize further sublicense of source of any * portion of the Covered Code, and must include terms to the effect that the * license from Licensee to its licensee is limited to the intellectual * property embodied in the software Licensee provides to its licensee, and * not to intellectual property embodied in modifications its licensee may * make. * * 3.3. Redistribution of Executable. Redistribution in executable form of any * substantial portion of the Covered Code or modification must reproduce the * above Copyright Notice, and the following Disclaimer and Export Compliance * provision in the documentation and/or other materials provided with the * distribution. * * 3.4. Intel retains all right, title, and interest in and to the Original * Intel Code. * * 3.5. Neither the name Intel nor any other trademark owned or controlled by * Intel shall be used in advertising or otherwise to promote the sale, use or * other dealings in products derived from or relating to the Covered Code * without prior written authorization from Intel. * * 4. Disclaimer and Export Compliance * * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A * PARTICULAR PURPOSE. * * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY * LIMITED REMEDY. * * 4.3. Licensee shall not export, either directly or indirectly, any of this * software or system incorporating such software without first obtaining any * required license or other approval from the U. S. Department of Commerce or * any other agency or department of the United States Government. In the * event Licensee exports any such software from the United States or * re-exports any such software from a foreign destination, Licensee shall * ensure that the distribution and export/re-export of the software is in * compliance with all laws, regulations, orders, or other restrictions of the * U.S. Export Administration Regulations. Licensee agrees that neither it nor * any of its subsidiaries will export/re-export any technical data, process, * software, or service, directly or indirectly, to any country for which the * United States government or any agency thereof requires an export license, * other governmental approval, or letter of assurance, without first obtaining * such license, approval or letter. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #include #include #define _COMPONENT ACPI_UTILITIES ACPI_MODULE_NAME ("utstate") /******************************************************************************* * * FUNCTION: AcpiUtPushGenericState * * PARAMETERS: ListHead - Head of the state stack * State - State object to push * * RETURN: None * * DESCRIPTION: Push a state object onto a state stack * ******************************************************************************/ void AcpiUtPushGenericState ( ACPI_GENERIC_STATE **ListHead, ACPI_GENERIC_STATE *State) { ACPI_FUNCTION_ENTRY (); /* Push the state object onto the front of the list (stack) */ State->Common.Next = *ListHead; *ListHead = State; return; } /******************************************************************************* * * FUNCTION: AcpiUtPopGenericState * * PARAMETERS: ListHead - Head of the state stack * * RETURN: The popped state object * * DESCRIPTION: Pop a state object from a state stack * ******************************************************************************/ ACPI_GENERIC_STATE * AcpiUtPopGenericState ( ACPI_GENERIC_STATE **ListHead) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); /* Remove the state object at the head of the list (stack) */ State = *ListHead; if (State) { /* Update the list head */ *ListHead = State->Common.Next; } return (State); } /******************************************************************************* * * FUNCTION: AcpiUtCreateGenericState * * PARAMETERS: None * * RETURN: The new state object. NULL on failure. * * DESCRIPTION: Create a generic state object. Attempt to obtain one from * the global state cache; If none available, create a new one. * ******************************************************************************/ ACPI_GENERIC_STATE * AcpiUtCreateGenericState ( void) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); State = AcpiOsAcquireObject (AcpiGbl_StateCache); if (State) { /* Initialize */ State->Common.DescriptorType = ACPI_DESC_TYPE_STATE; } return (State); } /******************************************************************************* * * FUNCTION: AcpiUtCreateThreadState * * PARAMETERS: None * * RETURN: New Thread State. NULL on failure * * DESCRIPTION: Create a "Thread State" - a flavor of the generic state used * to track per-thread info during method execution * ******************************************************************************/ ACPI_THREAD_STATE * AcpiUtCreateThreadState ( void) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); /* Create the generic state object */ State = AcpiUtCreateGenericState (); if (!State) { return (NULL); } /* Init fields specific to the update struct */ State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_THREAD; State->Thread.ThreadId = AcpiOsGetThreadId (); /* Check for invalid thread ID - zero is very bad, it will break things */ if (!State->Thread.ThreadId) { ACPI_ERROR ((AE_INFO, "Invalid zero ID from AcpiOsGetThreadId")); State->Thread.ThreadId = (ACPI_THREAD_ID) 1; } return ((ACPI_THREAD_STATE *) State); } /******************************************************************************* * * FUNCTION: AcpiUtCreateUpdateState * * PARAMETERS: Object - Initial Object to be installed in the state * Action - Update action to be performed * * RETURN: New state object, null on failure * * DESCRIPTION: Create an "Update State" - a flavor of the generic state used * to update reference counts and delete complex objects such * as packages. * ******************************************************************************/ ACPI_GENERIC_STATE * AcpiUtCreateUpdateState ( ACPI_OPERAND_OBJECT *Object, UINT16 Action) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); /* Create the generic state object */ State = AcpiUtCreateGenericState (); if (!State) { return (NULL); } /* Init fields specific to the update struct */ State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_UPDATE; State->Update.Object = Object; State->Update.Value = Action; return (State); } /******************************************************************************* * * FUNCTION: AcpiUtCreatePkgState * * PARAMETERS: Object - Initial Object to be installed in the state * Action - Update action to be performed * * RETURN: New state object, null on failure * * DESCRIPTION: Create a "Package State" * ******************************************************************************/ ACPI_GENERIC_STATE * AcpiUtCreatePkgState ( void *InternalObject, void *ExternalObject, UINT32 Index) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); /* Create the generic state object */ State = AcpiUtCreateGenericState (); if (!State) { return (NULL); } /* Init fields specific to the update struct */ State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_PACKAGE; State->Pkg.SourceObject = (ACPI_OPERAND_OBJECT *) InternalObject; State->Pkg.DestObject = ExternalObject; State->Pkg.Index= Index; State->Pkg.NumPackages = 1; return (State); } /******************************************************************************* * * FUNCTION: AcpiUtCreateControlState * * PARAMETERS: None * * RETURN: New state object, null on failure * * DESCRIPTION: Create a "Control State" - a flavor of the generic state used * to support nested IF/WHILE constructs in the AML. * ******************************************************************************/ ACPI_GENERIC_STATE * AcpiUtCreateControlState ( void) { ACPI_GENERIC_STATE *State; ACPI_FUNCTION_ENTRY (); /* Create the generic state object */ State = AcpiUtCreateGenericState (); if (!State) { return (NULL); } /* Init fields specific to the control struct */ State->Common.DescriptorType = ACPI_DESC_TYPE_STATE_CONTROL; State->Common.State = ACPI_CONTROL_CONDITIONAL_EXECUTING; return (State); } /******************************************************************************* * * FUNCTION: AcpiUtDeleteGenericState * * PARAMETERS: State - The state object to be deleted * * RETURN: None * * DESCRIPTION: Release a state object to the state cache. NULL state objects * are ignored. * ******************************************************************************/ void AcpiUtDeleteGenericState ( ACPI_GENERIC_STATE *State) { ACPI_FUNCTION_ENTRY (); /* Ignore null state */ if (State) { (void) AcpiOsReleaseObject (AcpiGbl_StateCache, State); } return; }