1 /****************************************************************************** 2 * 3 * Module Name: dswscope - Scope stack manipulation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2011, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 #define __DSWSCOPE_C__ 45 46 #include "acpi.h" 47 #include "accommon.h" 48 #include "acdispat.h" 49 50 51 #define _COMPONENT ACPI_DISPATCHER 52 ACPI_MODULE_NAME ("dswscope") 53 54 55 /**************************************************************************** 56 * 57 * FUNCTION: AcpiDsScopeStackClear 58 * 59 * PARAMETERS: WalkState - Current state 60 * 61 * RETURN: None 62 * 63 * DESCRIPTION: Pop (and free) everything on the scope stack except the 64 * root scope object (which remains at the stack top.) 65 * 66 ***************************************************************************/ 67 68 void 69 AcpiDsScopeStackClear ( 70 ACPI_WALK_STATE *WalkState) 71 { 72 ACPI_GENERIC_STATE *ScopeInfo; 73 74 ACPI_FUNCTION_NAME (DsScopeStackClear); 75 76 77 while (WalkState->ScopeInfo) 78 { 79 /* Pop a scope off the stack */ 80 81 ScopeInfo = WalkState->ScopeInfo; 82 WalkState->ScopeInfo = ScopeInfo->Scope.Next; 83 84 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 85 "Popped object type (%s)\n", 86 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 87 AcpiUtDeleteGenericState (ScopeInfo); 88 } 89 } 90 91 92 /**************************************************************************** 93 * 94 * FUNCTION: AcpiDsScopeStackPush 95 * 96 * PARAMETERS: Node - Name to be made current 97 * Type - Type of frame being pushed 98 * WalkState - Current state 99 * 100 * RETURN: Status 101 * 102 * DESCRIPTION: Push the current scope on the scope stack, and make the 103 * passed Node current. 104 * 105 ***************************************************************************/ 106 107 ACPI_STATUS 108 AcpiDsScopeStackPush ( 109 ACPI_NAMESPACE_NODE *Node, 110 ACPI_OBJECT_TYPE Type, 111 ACPI_WALK_STATE *WalkState) 112 { 113 ACPI_GENERIC_STATE *ScopeInfo; 114 ACPI_GENERIC_STATE *OldScopeInfo; 115 116 117 ACPI_FUNCTION_TRACE (DsScopeStackPush); 118 119 120 if (!Node) 121 { 122 /* Invalid scope */ 123 124 ACPI_ERROR ((AE_INFO, "Null scope parameter")); 125 return_ACPI_STATUS (AE_BAD_PARAMETER); 126 } 127 128 /* Make sure object type is valid */ 129 130 if (!AcpiUtValidObjectType (Type)) 131 { 132 ACPI_WARNING ((AE_INFO, 133 "Invalid object type: 0x%X", Type)); 134 } 135 136 /* Allocate a new scope object */ 137 138 ScopeInfo = AcpiUtCreateGenericState (); 139 if (!ScopeInfo) 140 { 141 return_ACPI_STATUS (AE_NO_MEMORY); 142 } 143 144 /* Init new scope object */ 145 146 ScopeInfo->Common.DescriptorType = ACPI_DESC_TYPE_STATE_WSCOPE; 147 ScopeInfo->Scope.Node = Node; 148 ScopeInfo->Common.Value = (UINT16) Type; 149 150 WalkState->ScopeDepth++; 151 152 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 153 "[%.2d] Pushed scope ", (UINT32) WalkState->ScopeDepth)); 154 155 OldScopeInfo = WalkState->ScopeInfo; 156 if (OldScopeInfo) 157 { 158 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 159 "[%4.4s] (%s)", 160 AcpiUtGetNodeName (OldScopeInfo->Scope.Node), 161 AcpiUtGetTypeName (OldScopeInfo->Common.Value))); 162 } 163 else 164 { 165 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 166 "[\\___] (%s)", "ROOT")); 167 } 168 169 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 170 ", New scope -> [%4.4s] (%s)\n", 171 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 172 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 173 174 /* Push new scope object onto stack */ 175 176 AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo); 177 return_ACPI_STATUS (AE_OK); 178 } 179 180 181 /**************************************************************************** 182 * 183 * FUNCTION: AcpiDsScopeStackPop 184 * 185 * PARAMETERS: WalkState - Current state 186 * 187 * RETURN: Status 188 * 189 * DESCRIPTION: Pop the scope stack once. 190 * 191 ***************************************************************************/ 192 193 ACPI_STATUS 194 AcpiDsScopeStackPop ( 195 ACPI_WALK_STATE *WalkState) 196 { 197 ACPI_GENERIC_STATE *ScopeInfo; 198 ACPI_GENERIC_STATE *NewScopeInfo; 199 200 201 ACPI_FUNCTION_TRACE (DsScopeStackPop); 202 203 204 /* 205 * Pop scope info object off the stack. 206 */ 207 ScopeInfo = AcpiUtPopGenericState (&WalkState->ScopeInfo); 208 if (!ScopeInfo) 209 { 210 return_ACPI_STATUS (AE_STACK_UNDERFLOW); 211 } 212 213 WalkState->ScopeDepth--; 214 215 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 216 "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", 217 (UINT32) WalkState->ScopeDepth, 218 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 219 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 220 221 NewScopeInfo = WalkState->ScopeInfo; 222 if (NewScopeInfo) 223 { 224 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 225 "[%4.4s] (%s)\n", 226 AcpiUtGetNodeName (NewScopeInfo->Scope.Node), 227 AcpiUtGetTypeName (NewScopeInfo->Common.Value))); 228 } 229 else 230 { 231 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 232 "[\\___] (ROOT)\n")); 233 } 234 235 AcpiUtDeleteGenericState (ScopeInfo); 236 return_ACPI_STATUS (AE_OK); 237 } 238 239 240