1 /****************************************************************************** 2 * 3 * Module Name: dswscope - Scope stack manipulation 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <contrib/dev/acpica/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 AcpiUtDeleteGenericState (ScopeInfo); 86 } 87 } 88 89 90 /**************************************************************************** 91 * 92 * FUNCTION: AcpiDsScopeStackPush 93 * 94 * PARAMETERS: Node - Name to be made current 95 * Type - Type of frame being pushed 96 * WalkState - Current state 97 * 98 * RETURN: Status 99 * 100 * DESCRIPTION: Push the current scope on the scope stack, and make the 101 * passed Node current. 102 * 103 ***************************************************************************/ 104 105 ACPI_STATUS 106 AcpiDsScopeStackPush ( 107 ACPI_NAMESPACE_NODE *Node, 108 ACPI_OBJECT_TYPE Type, 109 ACPI_WALK_STATE *WalkState) 110 { 111 ACPI_GENERIC_STATE *ScopeInfo; 112 ACPI_GENERIC_STATE *OldScopeInfo; 113 114 115 ACPI_FUNCTION_TRACE (DsScopeStackPush); 116 117 118 if (!Node) 119 { 120 /* Invalid scope */ 121 122 ACPI_ERROR ((AE_INFO, "Null scope parameter")); 123 return_ACPI_STATUS (AE_BAD_PARAMETER); 124 } 125 126 /* Make sure object type is valid */ 127 128 if (!AcpiUtValidObjectType (Type)) 129 { 130 ACPI_WARNING ((AE_INFO, 131 "Invalid object type: 0x%X", Type)); 132 } 133 134 /* Allocate a new scope object */ 135 136 ScopeInfo = AcpiUtCreateGenericState (); 137 if (!ScopeInfo) 138 { 139 return_ACPI_STATUS (AE_NO_MEMORY); 140 } 141 142 /* Init new scope object */ 143 144 ScopeInfo->Common.DescriptorType = ACPI_DESC_TYPE_STATE_WSCOPE; 145 ScopeInfo->Scope.Node = Node; 146 ScopeInfo->Common.Value = (UINT16) Type; 147 148 WalkState->ScopeDepth++; 149 150 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 151 "[%.2d] Pushed scope ", (UINT32) WalkState->ScopeDepth)); 152 153 OldScopeInfo = WalkState->ScopeInfo; 154 if (OldScopeInfo) 155 { 156 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 157 "[%4.4s] (%s)", 158 AcpiUtGetNodeName (OldScopeInfo->Scope.Node), 159 AcpiUtGetTypeName (OldScopeInfo->Common.Value))); 160 } 161 else 162 { 163 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 164 "[\\___] (%s)", "ROOT")); 165 } 166 167 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 168 ", New scope -> [%4.4s] (%s)\n", 169 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 170 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 171 172 /* Push new scope object onto stack */ 173 174 AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo); 175 return_ACPI_STATUS (AE_OK); 176 } 177 178 179 /**************************************************************************** 180 * 181 * FUNCTION: AcpiDsScopeStackPop 182 * 183 * PARAMETERS: WalkState - Current state 184 * 185 * RETURN: Status 186 * 187 * DESCRIPTION: Pop the scope stack once. 188 * 189 ***************************************************************************/ 190 191 ACPI_STATUS 192 AcpiDsScopeStackPop ( 193 ACPI_WALK_STATE *WalkState) 194 { 195 ACPI_GENERIC_STATE *ScopeInfo; 196 ACPI_GENERIC_STATE *NewScopeInfo; 197 198 199 ACPI_FUNCTION_TRACE (DsScopeStackPop); 200 201 202 /* 203 * Pop scope info object off the stack. 204 */ 205 ScopeInfo = AcpiUtPopGenericState (&WalkState->ScopeInfo); 206 if (!ScopeInfo) 207 { 208 return_ACPI_STATUS (AE_STACK_UNDERFLOW); 209 } 210 211 WalkState->ScopeDepth--; 212 213 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 214 "[%.2d] Popped scope [%4.4s] (%s), New scope -> ", 215 (UINT32) WalkState->ScopeDepth, 216 AcpiUtGetNodeName (ScopeInfo->Scope.Node), 217 AcpiUtGetTypeName (ScopeInfo->Common.Value))); 218 219 NewScopeInfo = WalkState->ScopeInfo; 220 if (NewScopeInfo) 221 { 222 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 223 "[%4.4s] (%s)\n", 224 AcpiUtGetNodeName (NewScopeInfo->Scope.Node), 225 AcpiUtGetTypeName (NewScopeInfo->Common.Value))); 226 } 227 else 228 { 229 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, 230 "[\\___] (ROOT)\n")); 231 } 232 233 AcpiUtDeleteGenericState (ScopeInfo); 234 return_ACPI_STATUS (AE_OK); 235 } 236