diff options
Diffstat (limited to 'sys/contrib/dev/acpica/compiler/asllookup.c')
| -rw-r--r-- | sys/contrib/dev/acpica/compiler/asllookup.c | 216 |
1 files changed, 216 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/compiler/asllookup.c b/sys/contrib/dev/acpica/compiler/asllookup.c new file mode 100644 index 0000000..66c0950 --- /dev/null +++ b/sys/contrib/dev/acpica/compiler/asllookup.c @@ -0,0 +1,216 @@ +/****************************************************************************** + * + * Module Name: asllookup- Namespace lookup functions + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2013, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + + +#include <contrib/dev/acpica/compiler/aslcompiler.h> +#include "aslcompiler.y.h" +#include <contrib/dev/acpica/include/acparser.h> +#include <contrib/dev/acpica/include/amlcode.h> +#include <contrib/dev/acpica/include/acnamesp.h> +#include <contrib/dev/acpica/include/acdispat.h> + + +#define _COMPONENT ACPI_COMPILER + ACPI_MODULE_NAME ("asllookup") + +/* Local prototypes */ + +static ACPI_STATUS +LkIsObjectUsed ( + ACPI_HANDLE ObjHandle, + UINT32 Level, + void *Context, + void **ReturnValue); + +static ACPI_PARSE_OBJECT * +LkGetNameOp ( + ACPI_PARSE_OBJECT *Op); + + +/******************************************************************************* + * + * FUNCTION: LkFindUnreferencedObjects + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Namespace walk to find objects that are not referenced in any + * way. Must be called after the namespace has been cross + * referenced. + * + ******************************************************************************/ + +void +LkFindUnreferencedObjects ( + void) +{ + + /* Walk entire namespace from the supplied root */ + + (void) AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, FALSE, LkIsObjectUsed, NULL, + NULL, NULL); +} + + +/******************************************************************************* + * + * FUNCTION: LkIsObjectUsed + * + * PARAMETERS: ACPI_WALK_CALLBACK + * + * RETURN: Status + * + * DESCRIPTION: Check for an unreferenced namespace object and emit a warning. + * We have to be careful, because some types and names are + * typically or always unreferenced, we don't want to issue + * excessive warnings. + * + ******************************************************************************/ + +static ACPI_STATUS +LkIsObjectUsed ( + ACPI_HANDLE ObjHandle, + UINT32 Level, + void *Context, + void **ReturnValue) +{ + ACPI_NAMESPACE_NODE *Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); + + + /* Referenced flag is set during the namespace xref */ + + if (Node->Flags & ANOBJ_IS_REFERENCED) + { + return (AE_OK); + } + + /* + * Ignore names that start with an underscore, + * these are the reserved ACPI names and are typically not referenced, + * they are called by the host OS. + */ + if (Node->Name.Ascii[0] == '_') + { + return (AE_OK); + } + + /* There are some types that are typically not referenced, ignore them */ + + switch (Node->Type) + { + case ACPI_TYPE_DEVICE: + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_POWER: + case ACPI_TYPE_LOCAL_RESOURCE: + + return (AE_OK); + + default: + + break; + } + + /* All others are valid unreferenced namespace objects */ + + if (Node->Op) + { + AslError (ASL_WARNING2, ASL_MSG_NOT_REFERENCED, LkGetNameOp (Node->Op), NULL); + } + return (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: LkGetNameOp + * + * PARAMETERS: Op - Current Op + * + * RETURN: NameOp associated with the input op + * + * DESCRIPTION: Find the name declaration op associated with the operator + * + ******************************************************************************/ + +static ACPI_PARSE_OBJECT * +LkGetNameOp ( + ACPI_PARSE_OBJECT *Op) +{ + const ACPI_OPCODE_INFO *OpInfo; + ACPI_PARSE_OBJECT *NameOp = Op; + + + OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); + + + /* Get the NamePath from the appropriate place */ + + if (OpInfo->Flags & AML_NAMED) + { + /* For nearly all NAMED operators, the name reference is the first child */ + + NameOp = Op->Asl.Child; + if (Op->Asl.AmlOpcode == AML_ALIAS_OP) + { + /* + * ALIAS is the only oddball opcode, the name declaration + * (alias name) is the second operand + */ + NameOp = Op->Asl.Child->Asl.Next; + } + } + else if (OpInfo->Flags & AML_CREATE) + { + /* Name must appear as the last parameter */ + + NameOp = Op->Asl.Child; + while (!(NameOp->Asl.CompileFlags & NODE_IS_NAME_DECLARATION)) + { + NameOp = NameOp->Asl.Next; + } + } + + return (NameOp); +} |
