1 /******************************************************************************
3 * Module Name: dswscope - Scope stack manipulation
5 *****************************************************************************/
8 * Copyright (C) 2000 - 2015, Intel Corp.
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20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
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23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
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
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44 #include <contrib/dev/acpica/include/acpi.h>
45 #include <contrib/dev/acpica/include/accommon.h>
46 #include <contrib/dev/acpica/include/acdispat.h>
49 #define _COMPONENT ACPI_DISPATCHER
50 ACPI_MODULE_NAME ("dswscope")
53 /****************************************************************************
55 * FUNCTION: AcpiDsScopeStackClear
57 * PARAMETERS: WalkState - Current state
61 * DESCRIPTION: Pop (and free) everything on the scope stack except the
62 * root scope object (which remains at the stack top.)
64 ***************************************************************************/
67 AcpiDsScopeStackClear (
68 ACPI_WALK_STATE *WalkState)
70 ACPI_GENERIC_STATE *ScopeInfo;
72 ACPI_FUNCTION_NAME (DsScopeStackClear);
75 while (WalkState->ScopeInfo)
77 /* Pop a scope off the stack */
79 ScopeInfo = WalkState->ScopeInfo;
80 WalkState->ScopeInfo = ScopeInfo->Scope.Next;
82 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
83 "Popped object type (%s)\n",
84 AcpiUtGetTypeName (ScopeInfo->Common.Value)));
85 AcpiUtDeleteGenericState (ScopeInfo);
90 /****************************************************************************
92 * FUNCTION: AcpiDsScopeStackPush
94 * PARAMETERS: Node - Name to be made current
95 * Type - Type of frame being pushed
96 * WalkState - Current state
100 * DESCRIPTION: Push the current scope on the scope stack, and make the
101 * passed Node current.
103 ***************************************************************************/
106 AcpiDsScopeStackPush (
107 ACPI_NAMESPACE_NODE *Node,
108 ACPI_OBJECT_TYPE Type,
109 ACPI_WALK_STATE *WalkState)
111 ACPI_GENERIC_STATE *ScopeInfo;
112 ACPI_GENERIC_STATE *OldScopeInfo;
115 ACPI_FUNCTION_TRACE (DsScopeStackPush);
122 ACPI_ERROR ((AE_INFO, "Null scope parameter"));
123 return_ACPI_STATUS (AE_BAD_PARAMETER);
126 /* Make sure object type is valid */
128 if (!AcpiUtValidObjectType (Type))
130 ACPI_WARNING ((AE_INFO,
131 "Invalid object type: 0x%X", Type));
134 /* Allocate a new scope object */
136 ScopeInfo = AcpiUtCreateGenericState ();
139 return_ACPI_STATUS (AE_NO_MEMORY);
142 /* Init new scope object */
144 ScopeInfo->Common.DescriptorType = ACPI_DESC_TYPE_STATE_WSCOPE;
145 ScopeInfo->Scope.Node = Node;
146 ScopeInfo->Common.Value = (UINT16) Type;
148 WalkState->ScopeDepth++;
150 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
151 "[%.2d] Pushed scope ", (UINT32) WalkState->ScopeDepth));
153 OldScopeInfo = WalkState->ScopeInfo;
156 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
158 AcpiUtGetNodeName (OldScopeInfo->Scope.Node),
159 AcpiUtGetTypeName (OldScopeInfo->Common.Value)));
163 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
164 "[\\___] (%s)", "ROOT"));
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)));
172 /* Push new scope object onto stack */
174 AcpiUtPushGenericState (&WalkState->ScopeInfo, ScopeInfo);
175 return_ACPI_STATUS (AE_OK);
179 /****************************************************************************
181 * FUNCTION: AcpiDsScopeStackPop
183 * PARAMETERS: WalkState - Current state
187 * DESCRIPTION: Pop the scope stack once.
189 ***************************************************************************/
192 AcpiDsScopeStackPop (
193 ACPI_WALK_STATE *WalkState)
195 ACPI_GENERIC_STATE *ScopeInfo;
196 ACPI_GENERIC_STATE *NewScopeInfo;
199 ACPI_FUNCTION_TRACE (DsScopeStackPop);
203 * Pop scope info object off the stack.
205 ScopeInfo = AcpiUtPopGenericState (&WalkState->ScopeInfo);
208 return_ACPI_STATUS (AE_STACK_UNDERFLOW);
211 WalkState->ScopeDepth--;
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)));
219 NewScopeInfo = WalkState->ScopeInfo;
222 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
224 AcpiUtGetNodeName (NewScopeInfo->Scope.Node),
225 AcpiUtGetTypeName (NewScopeInfo->Common.Value)));
229 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC,
230 "[\\___] (ROOT)\n"));
233 AcpiUtDeleteGenericState (ScopeInfo);
234 return_ACPI_STATUS (AE_OK);