1 /****************************************************************************** 2 * 3 * Module Name: dswscope - Scope stack manipulation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 #include "acpi.h" 45 #include "accommon.h" 46 #include "acdispat.h" 47 48 49 #define _COMPONENT ACPI_DISPATCHER 50 ACPI_MODULE_NAME ("dswscope") 51 52 53 /**************************************************************************** 54 * 55 * FUNCTION: AcpiDsScopeStackClear 56 * 57 * PARAMETERS: WalkState - Current state 58 * 59 * RETURN: None 60 * 61 * DESCRIPTION: Pop (and free) everything on the scope stack except the 62 * root scope object (which remains at the stack top.) 63 * 64 ***************************************************************************/ 65 66 void 67 AcpiDsScopeStackClear ( 68 ACPI_WALK_STATE *WalkState) 69 { 70 ACPI_GENERIC_STATE *ScopeInfo; 71 72 ACPI_FUNCTION_NAME (DsScopeStackClear); 73 74 75 while (WalkState->ScopeInfo) 76 { 77 /* Pop a scope off the stack */ 78 79 ScopeInfo = WalkState->ScopeInfo; 80 WalkState->ScopeInfo = ScopeInfo->Scope.Next; 81 82 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 83 "Popped object type (%s)\n", 84 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 85 86 AcpiUtDeleteGenericState (ScopeInfo); 87 } 88 } 89 90 91 /**************************************************************************** 92 * 93 * FUNCTION: AcpiDsScopeStackPush 94 * 95 * PARAMETERS: Node - Name to be made current 96 * Type - Type of frame being pushed 97 * WalkState - Current state 98 * 99 * RETURN: Status 100 * 101 * DESCRIPTION: Push the current scope on the scope stack, and make the 102 * passed Node current. 103 * 104 ***************************************************************************/ 105 106 ACPI_STATUS 107 AcpiDsScopeStackPush ( 108 ACPI_NAMESPACE_NODE *Node, 109 ACPI_OBJECT_TYPE Type, 110 ACPI_WALK_STATE *WalkState) 111 { 112 ACPI_GENERIC_STATE *ScopeInfo; 113 ACPI_GENERIC_STATE *OldScopeInfo; 114 115 116 ACPI_FUNCTION_TRACE (DsScopeStackPush); 117 118 119 if (!Node) 120 { 121 /* Invalid scope */ 122 123 ACPI_ERROR ((AE_INFO, "Null scope parameter")); 124 return_ACPI_STATUS (AE_BAD_PARAMETER); 125 } 126 127 /* Make sure object type is valid */ 128 129 if (!AcpiUtValidObjectType (Type)) 130 { 131 ACPI_WARNING ((AE_INFO, 132 "Invalid object type: 0x%X", Type)); 133 } 134 135 /* Allocate a new scope object */ 136 137 ScopeInfo = AcpiUtCreateGenericState (); 138 if (!ScopeInfo) 139 { 140 return_ACPI_STATUS (AE_NO_MEMORY); 141 } 142 143 /* Init new scope object */ 144 145 ScopeInfo->Common.DescriptorType = ACPI_DESC_TYPE_STATE_WSCOPE; 146 ScopeInfo->Scope.Node = Node; 147 ScopeInfo->Common.Value = (UINT16) Type; 148 149 WalkState->ScopeDepth++; 150 151 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 152 "[%.2d] Pushed scope ", (UINT32) WalkState->ScopeDepth)); 153 154 OldScopeInfo = WalkState->ScopeInfo; 155 if (OldScopeInfo) 156 { 157 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 158 "[%4.4s] (%s)", 159 AcpiUtGetNodeName (OldScopeInfo->Scope.Node), 160 AcpiUtGetTypeName (OldScopeInfo->Common.Value))); 161 } 162 else 163 { 164 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 165 "[\\___] (%s)", "ROOT")); 166 } 167 168 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 169 ", New scope -> [%4.4s] (%s)\n", 170 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 171 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 172 173 /* Push new scope object onto stack */ 174 175 AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo); 176 return_ACPI_STATUS (AE_OK); 177 } 178 179 180 /**************************************************************************** 181 * 182 * FUNCTION: AcpiDsScopeStackPop 183 * 184 * PARAMETERS: WalkState - Current state 185 * 186 * RETURN: Status 187 * 188 * DESCRIPTION: Pop the scope stack once. 189 * 190 ***************************************************************************/ 191 192 ACPI_STATUS 193 AcpiDsScopeStackPop ( 194 ACPI_WALK_STATE *WalkState) 195 { 196 ACPI_GENERIC_STATE *ScopeInfo; 197 ACPI_GENERIC_STATE *NewScopeInfo; 198 199 200 ACPI_FUNCTION_TRACE (DsScopeStackPop); 201 202 203 /* 204 * Pop scope info object off the stack. 205 */ 206 ScopeInfo = AcpiUtPopGenericState (&WalkState->ScopeInfo); 207 if (!ScopeInfo) 208 { 209 return_ACPI_STATUS (AE_STACK_UNDERFLOW); 210 } 211 212 WalkState->ScopeDepth--; 213 214 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 215 "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", 216 (UINT32) WalkState->ScopeDepth, 217 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 218 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 219 220 NewScopeInfo = WalkState->ScopeInfo; 221 if (NewScopeInfo) 222 { 223 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 224 "[%4.4s] (%s)\n", 225 AcpiUtGetNodeName (NewScopeInfo->Scope.Node), 226 AcpiUtGetTypeName (NewScopeInfo->Common.Value))); 227 } 228 else 229 { 230 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 231 "[\\___] (ROOT)\n")); 232 } 233 234 AcpiUtDeleteGenericState (ScopeInfo); 235 return_ACPI_STATUS (AE_OK); 236 } 237