dswscope.c revision 67754
167754Smsmith/****************************************************************************** 267754Smsmith * 377424Smsmith * Module Name: dswscope - Scope stack manipulation 4126372Snjl * $Revision: 39 $ 567754Smsmith * 667754Smsmith *****************************************************************************/ 767754Smsmith 867754Smsmith/****************************************************************************** 967754Smsmith * 1067754Smsmith * 1. Copyright Notice 1167754Smsmith * 12126372Snjl * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights 1370243Smsmith * reserved. 1467754Smsmith * 1567754Smsmith * 2. License 1667754Smsmith * 1767754Smsmith * 2.1. This is your license from Intel Corp. under its intellectual property 1867754Smsmith * rights. You may have additional license terms from the party that provided 1967754Smsmith * you this software, covering your right to use that party's intellectual 2067754Smsmith * property rights. 2167754Smsmith * 2267754Smsmith * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2367754Smsmith * copy of the source code appearing in this file ("Covered Code") an 2467754Smsmith * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2567754Smsmith * base code distributed originally by Intel ("Original Intel Code") to copy, 2667754Smsmith * make derivatives, distribute, use and display any portion of the Covered 2767754Smsmith * Code in any form, with the right to sublicense such rights; and 2867754Smsmith * 2967754Smsmith * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3067754Smsmith * license (with the right to sublicense), under only those claims of Intel 3167754Smsmith * patents that are infringed by the Original Intel Code, to make, use, sell, 3267754Smsmith * offer to sell, and import the Covered Code and derivative works thereof 3367754Smsmith * solely to the minimum extent necessary to exercise the above copyright 3467754Smsmith * license, and in no event shall the patent license extend to any additions 3567754Smsmith * to or modifications of the Original Intel Code. No other license or right 3667754Smsmith * is granted directly or by implication, estoppel or otherwise; 3767754Smsmith * 3867754Smsmith * The above copyright and patent license is granted only if the following 3967754Smsmith * conditions are met: 4067754Smsmith * 4167754Smsmith * 3. Conditions 4267754Smsmith * 4367754Smsmith * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4467754Smsmith * Redistribution of source code of any substantial portion of the Covered 4567754Smsmith * Code or modification with rights to further distribute source must include 4667754Smsmith * the above Copyright Notice, the above License, this list of Conditions, 4767754Smsmith * and the following Disclaimer and Export Compliance provision. In addition, 4867754Smsmith * Licensee must cause all Covered Code to which Licensee contributes to 4967754Smsmith * contain a file documenting the changes Licensee made to create that Covered 5067754Smsmith * Code and the date of any change. Licensee must include in that file the 5167754Smsmith * documentation of any changes made by any predecessor Licensee. Licensee 5267754Smsmith * must include a prominent statement that the modification is derived, 5367754Smsmith * directly or indirectly, from Original Intel Code. 5467754Smsmith * 5567754Smsmith * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5667754Smsmith * Redistribution of source code of any substantial portion of the Covered 5767754Smsmith * Code or modification without rights to further distribute source must 5867754Smsmith * include the following Disclaimer and Export Compliance provision in the 5967754Smsmith * documentation and/or other materials provided with distribution. In 6067754Smsmith * addition, Licensee may not authorize further sublicense of source of any 6167754Smsmith * portion of the Covered Code, and must include terms to the effect that the 6267754Smsmith * license from Licensee to its licensee is limited to the intellectual 6367754Smsmith * property embodied in the software Licensee provides to its licensee, and 6467754Smsmith * not to intellectual property embodied in modifications its licensee may 6567754Smsmith * make. 6667754Smsmith * 6767754Smsmith * 3.3. Redistribution of Executable. Redistribution in executable form of any 6867754Smsmith * substantial portion of the Covered Code or modification must reproduce the 6967754Smsmith * above Copyright Notice, and the following Disclaimer and Export Compliance 7067754Smsmith * provision in the documentation and/or other materials provided with the 7167754Smsmith * distribution. 7267754Smsmith * 7367754Smsmith * 3.4. Intel retains all right, title, and interest in and to the Original 7467754Smsmith * Intel Code. 7567754Smsmith * 7667754Smsmith * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7767754Smsmith * Intel shall be used in advertising or otherwise to promote the sale, use or 7867754Smsmith * other dealings in products derived from or relating to the Covered Code 7967754Smsmith * without prior written authorization from Intel. 8067754Smsmith * 8167754Smsmith * 4. Disclaimer and Export Compliance 8267754Smsmith * 8367754Smsmith * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8467754Smsmith * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8567754Smsmith * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8667754Smsmith * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8767754Smsmith * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8867754Smsmith * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8967754Smsmith * PARTICULAR PURPOSE. 9067754Smsmith * 9167754Smsmith * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9267754Smsmith * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9367754Smsmith * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9467754Smsmith * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9567754Smsmith * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9667754Smsmith * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9767754Smsmith * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9867754Smsmith * LIMITED REMEDY. 9967754Smsmith * 10067754Smsmith * 4.3. Licensee shall not export, either directly or indirectly, any of this 10167754Smsmith * software or system incorporating such software without first obtaining any 10267754Smsmith * required license or other approval from the U. S. Department of Commerce or 10367754Smsmith * any other agency or department of the United States Government. In the 10467754Smsmith * event Licensee exports any such software from the United States or 10567754Smsmith * re-exports any such software from a foreign destination, Licensee shall 10667754Smsmith * ensure that the distribution and export/re-export of the software is in 10767754Smsmith * compliance with all laws, regulations, orders, or other restrictions of the 10867754Smsmith * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10967754Smsmith * any of its subsidiaries will export/re-export any technical data, process, 11067754Smsmith * software, or service, directly or indirectly, to any country for which the 11167754Smsmith * United States government or any agency thereof requires an export license, 11267754Smsmith * other governmental approval, or letter of assurance, without first obtaining 11367754Smsmith * such license, approval or letter. 11467754Smsmith * 11567754Smsmith *****************************************************************************/ 11667754Smsmith 11767754Smsmith#define __DSWSCOPE_C__ 11867754Smsmith 11967754Smsmith#include "acpi.h" 12067754Smsmith#include "acinterp.h" 12167754Smsmith#include "acdispat.h" 12267754Smsmith 12377424Smsmith 12491116Smsmith#define _COMPONENT NAMESPACE 12567754Smsmith MODULE_NAME ("dswscope") 12667754Smsmith 12767754Smsmith 12867754Smsmith#define STACK_POP(head) head 12967754Smsmith 13067754Smsmith 13167754Smsmith/**************************************************************************** 13267754Smsmith * 13367754Smsmith * FUNCTION: AcpiDsScopeStackClear 13467754Smsmith * 13577424Smsmith * PARAMETERS: None 13667754Smsmith * 13767754Smsmith * DESCRIPTION: Pop (and free) everything on the scope stack except the 13867754Smsmith * root scope object (which remains at the stack top.) 13967754Smsmith * 14067754Smsmith ***************************************************************************/ 14167754Smsmith 14267754Smsmithvoid 14367754SmsmithAcpiDsScopeStackClear ( 14467754Smsmith ACPI_WALK_STATE *WalkState) 14567754Smsmith{ 14667754Smsmith ACPI_GENERIC_STATE *ScopeInfo; 14767754Smsmith 14867754Smsmith 14967754Smsmith while (WalkState->ScopeInfo) 15067754Smsmith { 15167754Smsmith /* Pop a scope off the stack */ 15267754Smsmith 15367754Smsmith ScopeInfo = WalkState->ScopeInfo; 15467754Smsmith WalkState->ScopeInfo = ScopeInfo->Scope.Next; 15567754Smsmith 15667754Smsmith DEBUG_PRINT (TRACE_EXEC, 15767754Smsmith ("Popped object type 0x%X\n", ScopeInfo->Common.Value)); 15891116Smsmith AcpiCmDeleteGenericState (ScopeInfo); 15967754Smsmith } 16077424Smsmith} 16167754Smsmith 16277424Smsmith 16377424Smsmith/**************************************************************************** 16477424Smsmith * 16577424Smsmith * FUNCTION: AcpiDsScopeStackPush 16667754Smsmith * 16791116Smsmith * PARAMETERS: *Node, - Name to be made current 16867754Smsmith * Type, - Type of frame being pushed 16967754Smsmith * 17067754Smsmith * DESCRIPTION: Push the current scope on the scope stack, and make the 17167754Smsmith * passed Node current. 17291116Smsmith * 17391116Smsmith ***************************************************************************/ 17491116Smsmith 17591116SmsmithACPI_STATUS 17691116SmsmithAcpiDsScopeStackPush ( 17791116Smsmith ACPI_NAMESPACE_NODE *Node, 17867754Smsmith OBJECT_TYPE_INTERNAL Type, 17967754Smsmith ACPI_WALK_STATE *WalkState) 18067754Smsmith{ 18167754Smsmith ACPI_GENERIC_STATE *ScopeInfo; 18267754Smsmith 18367754Smsmith 18467754Smsmith FUNCTION_TRACE ("DsScopeStackPush"); 18567754Smsmith 18667754Smsmith 18767754Smsmith if (!Node) 18867754Smsmith { 18967754Smsmith /* invalid scope */ 19067754Smsmith 19167754Smsmith REPORT_ERROR (("DsScopeStackPush: null scope passed\n")); 19277424Smsmith return_ACPI_STATUS (AE_BAD_PARAMETER); 19367754Smsmith } 19467754Smsmith 19567754Smsmith /* Make sure object type is valid */ 19667754Smsmith 19767754Smsmith if (!AcpiAmlValidateObjectType (Type)) 19867754Smsmith { 19967754Smsmith REPORT_WARNING (("DsScopeStackPush: type code out of range\n")); 20067754Smsmith } 20167754Smsmith 20267754Smsmith 20367754Smsmith /* Allocate a new scope object */ 20467754Smsmith 20567754Smsmith ScopeInfo = AcpiCmCreateGenericState (); 20667754Smsmith if (!ScopeInfo) 20767754Smsmith { 20867754Smsmith return_ACPI_STATUS (AE_NO_MEMORY); 20967754Smsmith } 21067754Smsmith 21167754Smsmith /* Init new scope object */ 21267754Smsmith 21367754Smsmith ScopeInfo->Scope.Node = Node; 21467754Smsmith ScopeInfo->Common.Value = (UINT16) Type; 21591116Smsmith 21667754Smsmith /* Push new scope object onto stack */ 21783174Smsmith 21867754Smsmith AcpiCmPushGenericState (&WalkState->ScopeInfo, ScopeInfo); 21977424Smsmith 22077424Smsmith return_ACPI_STATUS (AE_OK); 22177424Smsmith} 22277424Smsmith 22367754Smsmith 22491116Smsmith/**************************************************************************** 22567754Smsmith * 22667754Smsmith * FUNCTION: AcpiDsScopeStackPop 22767754Smsmith * 22867754Smsmith * PARAMETERS: Type - The type of frame to be found 22991116Smsmith * 23091116Smsmith * DESCRIPTION: Pop the scope stack until a frame of the requested type 23191116Smsmith * is found. 23291116Smsmith * 23391116Smsmith * RETURN: Count of frames popped. If no frame of the requested type 23491116Smsmith * was found, the count is returned as a negative number and 23567754Smsmith * the scope stack is emptied (which sets the current scope 23667754Smsmith * to the root). If the scope stack was empty at entry, the 23767754Smsmith * function is a no-op and returns 0. 23867754Smsmith * 23967754Smsmith ***************************************************************************/ 24067754Smsmith 24167754SmsmithACPI_STATUS 24267754SmsmithAcpiDsScopeStackPop ( 24367754Smsmith ACPI_WALK_STATE *WalkState) 24467754Smsmith{ 24567754Smsmith ACPI_GENERIC_STATE *ScopeInfo; 24667754Smsmith 24767754Smsmith 24867754Smsmith FUNCTION_TRACE ("DsScopeStackPop"); 24977424Smsmith 25067754Smsmith /* 25167754Smsmith * Pop scope info object off the stack. 25267754Smsmith */ 25367754Smsmith 25467754Smsmith ScopeInfo = AcpiCmPopGenericState (&WalkState->ScopeInfo); 25567754Smsmith if (!ScopeInfo) 25667754Smsmith { 25767754Smsmith return_ACPI_STATUS (AE_STACK_UNDERFLOW); 25867754Smsmith } 25967754Smsmith 26067754Smsmith DEBUG_PRINT (TRACE_EXEC, 26167754Smsmith ("Popped object type 0x%X\n", ScopeInfo->Common.Value)); 26267754Smsmith 26367754Smsmith AcpiCmDeleteGenericState (ScopeInfo); 26467754Smsmith 26567754Smsmith return_ACPI_STATUS (AE_OK); 26667754Smsmith} 26767754Smsmith 26867754Smsmith 26991116Smsmith