dswscope.c revision 77424
1/****************************************************************************** 2 * 3 * Module Name: dswscope - Scope stack manipulation 4 * $Revision: 45 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __DSWSCOPE_C__ 118 119#include "acpi.h" 120#include "acinterp.h" 121#include "acdispat.h" 122 123 124#define _COMPONENT ACPI_DISPATCHER 125 MODULE_NAME ("dswscope") 126 127 128#define STACK_POP(head) head 129 130 131/**************************************************************************** 132 * 133 * FUNCTION: AcpiDsScopeStackClear 134 * 135 * PARAMETERS: None 136 * 137 * DESCRIPTION: Pop (and free) everything on the scope stack except the 138 * root scope object (which remains at the stack top.) 139 * 140 ***************************************************************************/ 141 142void 143AcpiDsScopeStackClear ( 144 ACPI_WALK_STATE *WalkState) 145{ 146 ACPI_GENERIC_STATE *ScopeInfo; 147 148 149 while (WalkState->ScopeInfo) 150 { 151 /* Pop a scope off the stack */ 152 153 ScopeInfo = WalkState->ScopeInfo; 154 WalkState->ScopeInfo = ScopeInfo->Scope.Next; 155 156 DEBUG_PRINT (TRACE_EXEC, 157 ("Popped object type %X\n", ScopeInfo->Common.Value)); 158 AcpiUtDeleteGenericState (ScopeInfo); 159 } 160} 161 162 163/**************************************************************************** 164 * 165 * FUNCTION: AcpiDsScopeStackPush 166 * 167 * PARAMETERS: *Node, - Name to be made current 168 * Type, - Type of frame being pushed 169 * 170 * DESCRIPTION: Push the current scope on the scope stack, and make the 171 * passed Node current. 172 * 173 ***************************************************************************/ 174 175ACPI_STATUS 176AcpiDsScopeStackPush ( 177 ACPI_NAMESPACE_NODE *Node, 178 ACPI_OBJECT_TYPE8 Type, 179 ACPI_WALK_STATE *WalkState) 180{ 181 ACPI_GENERIC_STATE *ScopeInfo; 182 183 184 FUNCTION_TRACE ("DsScopeStackPush"); 185 186 187 if (!Node) 188 { 189 /* invalid scope */ 190 191 REPORT_ERROR (("DsScopeStackPush: null scope passed\n")); 192 return_ACPI_STATUS (AE_BAD_PARAMETER); 193 } 194 195 /* Make sure object type is valid */ 196 197 if (!AcpiExValidateObjectType (Type)) 198 { 199 REPORT_WARNING (("DsScopeStackPush: type code out of range\n")); 200 } 201 202 203 /* Allocate a new scope object */ 204 205 ScopeInfo = AcpiUtCreateGenericState (); 206 if (!ScopeInfo) 207 { 208 return_ACPI_STATUS (AE_NO_MEMORY); 209 } 210 211 /* Init new scope object */ 212 213 ScopeInfo->Scope.Node = Node; 214 ScopeInfo->Common.Value = (UINT16) Type; 215 216 /* Push new scope object onto stack */ 217 218 AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo); 219 220 return_ACPI_STATUS (AE_OK); 221} 222 223 224/**************************************************************************** 225 * 226 * FUNCTION: AcpiDsScopeStackPop 227 * 228 * PARAMETERS: Type - The type of frame to be found 229 * 230 * DESCRIPTION: Pop the scope stack until a frame of the requested type 231 * is found. 232 * 233 * RETURN: Count of frames popped. If no frame of the requested type 234 * was found, the count is returned as a negative number and 235 * the scope stack is emptied (which sets the current scope 236 * to the root). If the scope stack was empty at entry, the 237 * function is a no-op and returns 0. 238 * 239 ***************************************************************************/ 240 241ACPI_STATUS 242AcpiDsScopeStackPop ( 243 ACPI_WALK_STATE *WalkState) 244{ 245 ACPI_GENERIC_STATE *ScopeInfo; 246 247 248 FUNCTION_TRACE ("DsScopeStackPop"); 249 250 /* 251 * Pop scope info object off the stack. 252 */ 253 254 ScopeInfo = AcpiUtPopGenericState (&WalkState->ScopeInfo); 255 if (!ScopeInfo) 256 { 257 return_ACPI_STATUS (AE_STACK_UNDERFLOW); 258 } 259 260 DEBUG_PRINT (TRACE_EXEC, 261 ("Popped object type %X\n", ScopeInfo->Common.Value)); 262 263 AcpiUtDeleteGenericState (ScopeInfo); 264 265 return_ACPI_STATUS (AE_OK); 266} 267 268 269