asllookup.c revision 281075
1210284Sjmallett/****************************************************************************** 2232812Sjmallett * 3215990Sjmallett * Module Name: asllookup- Namespace lookup functions 4210284Sjmallett * 5210284Sjmallett *****************************************************************************/ 6215990Sjmallett 7215990Sjmallett/* 8215990Sjmallett * Copyright (C) 2000 - 2015, Intel Corp. 9210284Sjmallett * All rights reserved. 10215990Sjmallett * 11215990Sjmallett * Redistribution and use in source and binary forms, with or without 12210284Sjmallett * modification, are permitted provided that the following conditions 13215990Sjmallett * are met: 14215990Sjmallett * 1. Redistributions of source code must retain the above copyright 15215990Sjmallett * notice, this list of conditions, and the following disclaimer, 16215990Sjmallett * without modification. 17215990Sjmallett * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18232812Sjmallett * substantially similar to the "NO WARRANTY" disclaimer below 19215990Sjmallett * ("Disclaimer") and any redistribution must be conditioned upon 20215990Sjmallett * including a substantially similar Disclaimer requirement for further 21215990Sjmallett * binary redistribution. 22215990Sjmallett * 3. Neither the names of the above-listed copyright holders nor the names 23215990Sjmallett * of any contributors may be used to endorse or promote products derived 24215990Sjmallett * from this software without specific prior written permission. 25215990Sjmallett * 26215990Sjmallett * Alternatively, this software may be distributed under the terms of the 27215990Sjmallett * GNU General Public License ("GPL") version 2 as published by the Free 28215990Sjmallett * Software Foundation. 29232812Sjmallett * 30215990Sjmallett * NO WARRANTY 31215990Sjmallett * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32215990Sjmallett * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33215990Sjmallett * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34215990Sjmallett * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35215990Sjmallett * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36215990Sjmallett * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37215990Sjmallett * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38210284Sjmallett * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39210284Sjmallett * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40210284Sjmallett * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41210284Sjmallett * POSSIBILITY OF SUCH DAMAGES. 42210284Sjmallett */ 43210284Sjmallett 44210284Sjmallett#include <contrib/dev/acpica/compiler/aslcompiler.h> 45215990Sjmallett#include "aslcompiler.y.h" 46210284Sjmallett#include <contrib/dev/acpica/include/acparser.h> 47210284Sjmallett#include <contrib/dev/acpica/include/amlcode.h> 48210284Sjmallett#include <contrib/dev/acpica/include/acnamesp.h> 49210284Sjmallett#include <contrib/dev/acpica/include/acdispat.h> 50210284Sjmallett 51232812Sjmallett 52210284Sjmallett#define _COMPONENT ACPI_COMPILER 53210284Sjmallett ACPI_MODULE_NAME ("asllookup") 54210284Sjmallett 55215990Sjmallett/* Local prototypes */ 56215990Sjmallett 57215990Sjmallettstatic ACPI_STATUS 58215990SjmallettLkIsObjectUsed ( 59215990Sjmallett ACPI_HANDLE ObjHandle, 60215990Sjmallett UINT32 Level, 61215990Sjmallett void *Context, 62210284Sjmallett void **ReturnValue); 63210284Sjmallett 64210284Sjmallettstatic ACPI_PARSE_OBJECT * 65215990SjmallettLkGetNameOp ( 66210284Sjmallett ACPI_PARSE_OBJECT *Op); 67210284Sjmallett 68210284Sjmallett 69210284Sjmallett/******************************************************************************* 70210284Sjmallett * 71210284Sjmallett * FUNCTION: LkFindUnreferencedObjects 72210284Sjmallett * 73210284Sjmallett * PARAMETERS: None 74210284Sjmallett * 75210284Sjmallett * RETURN: None 76210284Sjmallett * 77210284Sjmallett * DESCRIPTION: Namespace walk to find objects that are not referenced in any 78210284Sjmallett * way. Must be called after the namespace has been cross 79210284Sjmallett * referenced. 80210284Sjmallett * 81210284Sjmallett ******************************************************************************/ 82210284Sjmallett 83210284Sjmallettvoid 84210284SjmallettLkFindUnreferencedObjects ( 85210284Sjmallett void) 86210284Sjmallett{ 87210284Sjmallett 88215990Sjmallett /* Walk entire namespace from the supplied root */ 89210284Sjmallett 90210284Sjmallett (void) AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 91210284Sjmallett ACPI_UINT32_MAX, FALSE, LkIsObjectUsed, NULL, 92210284Sjmallett NULL, NULL); 93210284Sjmallett} 94210284Sjmallett 95210284Sjmallett 96210284Sjmallett/******************************************************************************* 97210284Sjmallett * 98210284Sjmallett * FUNCTION: LkIsObjectUsed 99210284Sjmallett * 100210284Sjmallett * PARAMETERS: ACPI_WALK_CALLBACK 101210284Sjmallett * 102210284Sjmallett * RETURN: Status 103210284Sjmallett * 104210284Sjmallett * DESCRIPTION: Check for an unreferenced namespace object and emit a warning. 105210284Sjmallett * We have to be careful, because some types and names are 106210284Sjmallett * typically or always unreferenced, we don't want to issue 107210284Sjmallett * excessive warnings. Note: Names that are declared within a 108210284Sjmallett * control method are temporary, so we always issue a remark 109210284Sjmallett * if they are not referenced. 110210284Sjmallett * 111210284Sjmallett ******************************************************************************/ 112210284Sjmallett 113210284Sjmallettstatic ACPI_STATUS 114210284SjmallettLkIsObjectUsed ( 115210284Sjmallett ACPI_HANDLE ObjHandle, 116215990Sjmallett UINT32 Level, 117210284Sjmallett void *Context, 118210284Sjmallett void **ReturnValue) 119210284Sjmallett{ 120232812Sjmallett ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 121232812Sjmallett ACPI_NAMESPACE_NODE *Next; 122232812Sjmallett 123232812Sjmallett 124232812Sjmallett /* Referenced flag is set during the namespace xref */ 125232812Sjmallett 126232812Sjmallett if (Node->Flags & ANOBJ_IS_REFERENCED) 127232812Sjmallett { 128232812Sjmallett return (AE_OK); 129232812Sjmallett } 130232812Sjmallett 131232812Sjmallett if (!Node->Op) 132232812Sjmallett { 133232812Sjmallett return (AE_OK); 134232812Sjmallett } 135232812Sjmallett 136232812Sjmallett /* These types are typically never directly referenced, ignore them */ 137232812Sjmallett 138232812Sjmallett switch (Node->Type) 139232812Sjmallett { 140232812Sjmallett case ACPI_TYPE_DEVICE: 141215990Sjmallett case ACPI_TYPE_PROCESSOR: 142215990Sjmallett case ACPI_TYPE_POWER: 143215990Sjmallett case ACPI_TYPE_THERMAL: 144210284Sjmallett case ACPI_TYPE_LOCAL_RESOURCE: 145210284Sjmallett 146210284Sjmallett return (AE_OK); 147210284Sjmallett 148210284Sjmallett default: 149210284Sjmallett 150210284Sjmallett break; 151210284Sjmallett } 152210284Sjmallett 153210284Sjmallett /* Determine if the name is within a control method */ 154215990Sjmallett 155215990Sjmallett Next = Node->Parent; 156215990Sjmallett while (Next) 157210284Sjmallett { 158210284Sjmallett if (Next->Type == ACPI_TYPE_METHOD) 159210284Sjmallett { 160210284Sjmallett /* 161210284Sjmallett * Name is within a method, therefore it is temporary. 162210284Sjmallett * Issue a remark even if it is a reserved name (starts 163210284Sjmallett * with an underscore). 164210284Sjmallett */ 165210284Sjmallett sprintf (MsgBuffer, "Name is within method [%4.4s]", 166210284Sjmallett Next->Name.Ascii); 167210284Sjmallett AslError (ASL_REMARK, ASL_MSG_NOT_REFERENCED, 168210284Sjmallett LkGetNameOp (Node->Op), MsgBuffer); 169215990Sjmallett return (AE_OK); 170210284Sjmallett } 171210284Sjmallett 172210284Sjmallett Next = Next->Parent; 173210284Sjmallett } 174210284Sjmallett 175215990Sjmallett /* The name is not within a control method */ 176210284Sjmallett 177210284Sjmallett /* 178210284Sjmallett * Ignore names that start with an underscore. These are the reserved 179210284Sjmallett * ACPI names and are typically not referenced since they are meant 180210284Sjmallett * to be called by the host OS. 181210284Sjmallett */ 182210284Sjmallett if (Node->Name.Ascii[0] == '_') 183210284Sjmallett { 184210284Sjmallett return (AE_OK); 185210284Sjmallett } 186210284Sjmallett 187210284Sjmallett /* 188210284Sjmallett * What remains is an unresolved user name that is not within a method. 189210284Sjmallett * However, the object could be referenced via another table, so issue 190210284Sjmallett * the warning at level 2. 191210284Sjmallett */ 192210284Sjmallett AslError (ASL_WARNING2, ASL_MSG_NOT_REFERENCED, 193210284Sjmallett LkGetNameOp (Node->Op), NULL); 194210284Sjmallett return (AE_OK); 195210284Sjmallett} 196210284Sjmallett 197210284Sjmallett 198210284Sjmallett/******************************************************************************* 199210284Sjmallett * 200210284Sjmallett * FUNCTION: LkGetNameOp 201210284Sjmallett * 202210284Sjmallett * PARAMETERS: Op - Current Op 203210284Sjmallett * 204210284Sjmallett * RETURN: NameOp associated with the input op 205210284Sjmallett * 206210284Sjmallett * DESCRIPTION: Find the name declaration op associated with the operator 207210284Sjmallett * 208210284Sjmallett ******************************************************************************/ 209210284Sjmallett 210210284Sjmallettstatic ACPI_PARSE_OBJECT * 211210284SjmallettLkGetNameOp ( 212210284Sjmallett ACPI_PARSE_OBJECT *Op) 213210284Sjmallett{ 214210284Sjmallett const ACPI_OPCODE_INFO *OpInfo; 215210284Sjmallett ACPI_PARSE_OBJECT *NameOp = Op; 216210284Sjmallett 217210284Sjmallett 218210284Sjmallett OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); 219232812Sjmallett 220210284Sjmallett 221215990Sjmallett /* Get the NamePath from the appropriate place */ 222210284Sjmallett 223210284Sjmallett if (OpInfo->Flags & AML_NAMED) 224210284Sjmallett { 225210284Sjmallett /* For nearly all NAMED operators, the name reference is the first child */ 226210284Sjmallett 227210284Sjmallett NameOp = Op->Asl.Child; 228210284Sjmallett if (Op->Asl.AmlOpcode == AML_ALIAS_OP) 229210284Sjmallett { 230210284Sjmallett /* 231210284Sjmallett * ALIAS is the only oddball opcode, the name declaration 232210284Sjmallett * (alias name) is the second operand 233210284Sjmallett */ 234210284Sjmallett NameOp = Op->Asl.Child->Asl.Next; 235210284Sjmallett } 236210284Sjmallett } 237210284Sjmallett else if (OpInfo->Flags & AML_CREATE) 238210284Sjmallett { 239210284Sjmallett /* Name must appear as the last parameter */ 240210284Sjmallett 241210284Sjmallett NameOp = Op->Asl.Child; 242210284Sjmallett while (!(NameOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)) 243210284Sjmallett { 244232812Sjmallett NameOp = NameOp->Asl.Next; 245232812Sjmallett } 246210284Sjmallett } 247210284Sjmallett 248210284Sjmallett return (NameOp); 249210284Sjmallett} 250210284Sjmallett