usr/src/uts/intel/io/acpica/executer/exresnte.c

   1 /******************************************************************************
   2  *
   3  * Module Name: exresnte - AML Interpreter object resolution
   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 #include "acinterp.h"
  48 #include "acnamesp.h"
  49
  50
  51 #define _COMPONENT          ACPI_EXECUTER
  52         ACPI_MODULE_NAME    ("exresnte")
  53
  54
  55 /*******************************************************************************
  56  *
  57  * FUNCTION:    AcpiExResolveNodeToValue
  58  *
  59  * PARAMETERS:  ObjectPtr       - Pointer to a location that contains
  60  *                                a pointer to a NS node, and will receive a
  61  *                                pointer to the resolved object.
  62  *              WalkState       - Current state. Valid only if executing AML
  63  *                                code. NULL if simply resolving an object
  64  *
  65  * RETURN:      Status
  66  *
  67  * DESCRIPTION: Resolve a Namespace node to a valued object
  68  *
  69  * Note: for some of the data types, the pointer attached to the Node
  70  * can be either a pointer to an actual internal object or a pointer into the
  71  * AML stream itself. These types are currently:
  72  *
  73  *      ACPI_TYPE_INTEGER
  74  *      ACPI_TYPE_STRING
  75  *      ACPI_TYPE_BUFFER
  76  *      ACPI_TYPE_MUTEX
  77  *      ACPI_TYPE_PACKAGE
  78  *
  79  ******************************************************************************/
  80
  81 ACPI_STATUS
  82 AcpiExResolveNodeToValue (
  83     ACPI_NAMESPACE_NODE     **ObjectPtr,
  84     ACPI_WALK_STATE         *WalkState)
  85
  86 {
  87     ACPI_STATUS             Status = AE_OK;
  88     ACPI_OPERAND_OBJECT     *SourceDesc;
  89     ACPI_OPERAND_OBJECT     *ObjDesc = NULL;
  90     ACPI_NAMESPACE_NODE     *Node;
  91     ACPI_OBJECT_TYPE        EntryType;
  92
  93
  94     ACPI_FUNCTION_TRACE (ExResolveNodeToValue);
  95
  96
  97     /*
  98      * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
  99      * object that is attached to the Node.
 100      */
 101     Node = *ObjectPtr;
 102     SourceDesc = AcpiNsGetAttachedObject (Node);
 103     EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
 104
 105     ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
 106          Node, SourceDesc, AcpiUtGetTypeName (EntryType)));
 107
 108     if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) ||
 109         (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))
 110     {
 111         /* There is always exactly one level of indirection */
 112
 113         Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
 114         SourceDesc = AcpiNsGetAttachedObject (Node);
 115         EntryType = AcpiNsGetType ((ACPI_HANDLE) Node);
 116         *ObjectPtr = Node;
 117     }
 118
 119     /*
 120      * Several object types require no further processing:
 121      * 1) Device/Thermal objects don't have a "real" subobject, return Node
 122      * 2) Method locals and arguments have a pseudo-Node
 123      * 3) 10/2007: Added method type to assist with Package construction.
 124      */
 125     if ((EntryType == ACPI_TYPE_DEVICE)  ||
 126         (EntryType == ACPI_TYPE_THERMAL) ||
 127         (EntryType == ACPI_TYPE_METHOD)  ||
 128         (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
 129     {
 130         return_ACPI_STATUS (AE_OK);
 131     }
 132
 133     if (!SourceDesc)
 134     {
 135         ACPI_ERROR ((AE_INFO, "No object attached to node [%4.4s] %p",
 136             Node->Name.Ascii, Node));
 137         return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE);
 138     }
 139
 140     /*
 141      * Action is based on the type of the Node, which indicates the type
 142      * of the attached object or pointer
 143      */
 144     switch (EntryType)
 145     {
 146     case ACPI_TYPE_PACKAGE:
 147
 148         if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
 149         {
 150             ACPI_ERROR ((AE_INFO, "Object not a Package, type %s",
 151                 AcpiUtGetObjectTypeName (SourceDesc)));
 152             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 153         }
 154
 155         Status = AcpiDsGetPackageArguments (SourceDesc);
 156         if (ACPI_SUCCESS (Status))
 157         {
 158             /* Return an additional reference to the object */
 159
 160             ObjDesc = SourceDesc;
 161             AcpiUtAddReference (ObjDesc);
 162         }
 163         break;
 164
 165     case ACPI_TYPE_BUFFER:
 166
 167         if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)
 168         {
 169             ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s",
 170                 AcpiUtGetObjectTypeName (SourceDesc)));
 171             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 172         }
 173
 174         Status = AcpiDsGetBufferArguments (SourceDesc);
 175         if (ACPI_SUCCESS (Status))
 176         {
 177             /* Return an additional reference to the object */
 178
 179             ObjDesc = SourceDesc;
 180             AcpiUtAddReference (ObjDesc);
 181         }
 182         break;
 183
 184     case ACPI_TYPE_STRING:
 185
 186         if (SourceDesc->Common.Type != ACPI_TYPE_STRING)
 187         {
 188             ACPI_ERROR ((AE_INFO, "Object not a String, type %s",
 189                 AcpiUtGetObjectTypeName (SourceDesc)));
 190             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 191         }
 192
 193         /* Return an additional reference to the object */
 194
 195         ObjDesc = SourceDesc;
 196         AcpiUtAddReference (ObjDesc);
 197         break;
 198
 199     case ACPI_TYPE_INTEGER:
 200
 201         if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER)
 202         {
 203             ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s",
 204                 AcpiUtGetObjectTypeName (SourceDesc)));
 205             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 206         }
 207
 208         /* Return an additional reference to the object */
 209
 210         ObjDesc = SourceDesc;
 211         AcpiUtAddReference (ObjDesc);
 212         break;
 213
 214     case ACPI_TYPE_BUFFER_FIELD:
 215     case ACPI_TYPE_LOCAL_REGION_FIELD:
 216     case ACPI_TYPE_LOCAL_BANK_FIELD:
 217     case ACPI_TYPE_LOCAL_INDEX_FIELD:
 218
 219         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
 220             "FieldRead Node=%p SourceDesc=%p Type=%X\n",
 221             Node, SourceDesc, EntryType));
 222
 223         Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc);
 224         break;
 225
 226     /* For these objects, just return the object attached to the Node */
 227
 228     case ACPI_TYPE_MUTEX:
 229     case ACPI_TYPE_POWER:
 230     case ACPI_TYPE_PROCESSOR:
 231     case ACPI_TYPE_EVENT:
 232     case ACPI_TYPE_REGION:
 233
 234         /* Return an additional reference to the object */
 235
 236         ObjDesc = SourceDesc;
 237         AcpiUtAddReference (ObjDesc);
 238         break;
 239
 240     /* TYPE_ANY is untyped, and thus there is no object associated with it */
 241
 242     case ACPI_TYPE_ANY:
 243
 244         ACPI_ERROR ((AE_INFO,
 245             "Untyped entry %p, no attached object!", Node));
 246
 247         return_ACPI_STATUS (AE_AML_OPERAND_TYPE);  /* Cannot be AE_TYPE */
 248
 249     case ACPI_TYPE_LOCAL_REFERENCE:
 250
 251         switch (SourceDesc->Reference.Class)
 252         {
 253         case ACPI_REFCLASS_TABLE:   /* This is a DdbHandle */
 254         case ACPI_REFCLASS_REFOF:
 255         case ACPI_REFCLASS_INDEX:
 256
 257             /* Return an additional reference to the object */
 258
 259             ObjDesc = SourceDesc;
 260             AcpiUtAddReference (ObjDesc);
 261             break;
 262
 263         default:
 264
 265             /* No named references are allowed here */
 266
 267             ACPI_ERROR ((AE_INFO,
 268                 "Unsupported Reference type 0x%X",
 269                 SourceDesc->Reference.Class));
 270
 271             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 272         }
 273         break;
 274
 275     default:
 276
 277         /* Default case is for unknown types */
 278
 279         ACPI_ERROR ((AE_INFO,
 280             "Node %p - Unknown object type 0x%X",
 281             Node, EntryType));
 282
 283         return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 284
 285     } /* switch (EntryType) */
 286
 287
 288     /* Return the object descriptor */
 289
 290     *ObjectPtr = (void *) ObjDesc;
 291     return_ACPI_STATUS (Status);
 292 }