/******************************************************************************
*
* Module Name: psutils - Parser miscellaneous utilities (Parser only)
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification with rights to further distribute source must include
* the above Copyright Notice, the above License, this list of Conditions,
* and the following Disclaimer and Export Compliance provision. In addition,
* Licensee must cause all Covered Code to which Licensee contributes to
* contain a file documenting the changes Licensee made to create that Covered
* Code and the date of any change. Licensee must include in that file the
* documentation of any changes made by any predecessor Licensee. Licensee
* must include a prominent statement that the modification is derived,
* directly or indirectly, from Original Intel Code.
*
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
* Redistribution of source code of any substantial portion of the Covered
* Code or modification without rights to further distribute source must
* include the following Disclaimer and Export Compliance provision in the
* documentation and/or other materials provided with distribution. In
* addition, Licensee may not authorize further sublicense of source of any
* portion of the Covered Code, and must include terms to the effect that the
* license from Licensee to its licensee is limited to the intellectual
* property embodied in the software Licensee provides to its licensee, and
* not to intellectual property embodied in modifications its licensee may
* make.
*
* 3.3. Redistribution of Executable. Redistribution in executable form of any
* substantial portion of the Covered Code or modification must reproduce the
* above Copyright Notice, and the following Disclaimer and Export Compliance
* provision in the documentation and/or other materials provided with the
* distribution.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* Intel shall be used in advertising or otherwise to promote the sale, use or
* other dealings in products derived from or relating to the Covered Code
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or
* re-exports any such software from a foreign destination, Licensee shall
* ensure that the distribution and export/re-export of the software is in
* compliance with all laws, regulations, orders, or other restrictions of the
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#include "acpi.h"
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#define _COMPONENT ACPI_PARSER
ACPI_MODULE_NAME ("psutils")
/*******************************************************************************
*
* FUNCTION: AcpiPsCreateScopeOp
*
* PARAMETERS: None
*
* RETURN: A new Scope object, null on failure
*
* DESCRIPTION: Create a Scope and associated namepath op with the root name
*
******************************************************************************/
ACPI_PARSE_OBJECT *
AcpiPsCreateScopeOp (
void)
{
ACPI_PARSE_OBJECT *ScopeOp;
ScopeOp = AcpiPsAllocOp (AML_SCOPE_OP);
if (!ScopeOp)
{
return (NULL);
}
ScopeOp->Named.Name = ACPI_ROOT_NAME;
return (ScopeOp);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsInitOp
*
* PARAMETERS: Op - A newly allocated Op object
* Opcode - Opcode to store in the Op
*
* RETURN: None
*
* DESCRIPTION: Initialize a parse (Op) object
*
******************************************************************************/
void
AcpiPsInitOp (
ACPI_PARSE_OBJECT *Op,
UINT16 Opcode)
{
ACPI_FUNCTION_ENTRY ();
Op->Common.DescriptorType = ACPI_DESC_TYPE_PARSER;
Op->Common.AmlOpcode = Opcode;
ACPI_DISASM_ONLY_MEMBERS (ACPI_STRNCPY (Op->Common.AmlOpName,
(AcpiPsGetOpcodeInfo (Opcode))->Name,
sizeof (Op->Common.AmlOpName)));
}
/*******************************************************************************
*
* FUNCTION: AcpiPsAllocOp
*
* PARAMETERS: Opcode - Opcode that will be stored in the new Op
*
* RETURN: Pointer to the new Op, null on failure
*
* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
* opcode. A cache of opcodes is available for the pure
* GENERIC_OP, since this is by far the most commonly used.
*
******************************************************************************/
ACPI_PARSE_OBJECT*
AcpiPsAllocOp (
UINT16 Opcode)
{
ACPI_PARSE_OBJECT *Op;
const ACPI_OPCODE_INFO *OpInfo;
UINT8 Flags = ACPI_PARSEOP_GENERIC;
ACPI_FUNCTION_ENTRY ();
OpInfo = AcpiPsGetOpcodeInfo (Opcode);
/* Determine type of ParseOp required */
if (OpInfo->Flags & AML_DEFER)
{
Flags = ACPI_PARSEOP_DEFERRED;
}
else if (OpInfo->Flags & AML_NAMED)
{
Flags = ACPI_PARSEOP_NAMED;
}
else if (Opcode == AML_INT_BYTELIST_OP)
{
Flags = ACPI_PARSEOP_BYTELIST;
}
/* Allocate the minimum required size object */
if (Flags == ACPI_PARSEOP_GENERIC)
{
/* The generic op (default) is by far the most common (16 to 1) */
Op = AcpiOsAcquireObject (AcpiGbl_PsNodeCache);
}
else
{
/* Extended parseop */
Op = AcpiOsAcquireObject (AcpiGbl_PsNodeExtCache);
}
/* Initialize the Op */
if (Op)
{
AcpiPsInitOp (Op, Opcode);
Op->Common.Flags = Flags;
}
return (Op);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsFreeOp
*
* PARAMETERS: Op - Op to be freed
*
* RETURN: None.
*
* DESCRIPTION: Free an Op object. Either put it on the GENERIC_OP cache list
* or actually free it.
*
******************************************************************************/
void
AcpiPsFreeOp (
ACPI_PARSE_OBJECT *Op)
{
ACPI_FUNCTION_NAME (PsFreeOp);
if (Op->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Free retval op: %p\n", Op));
}
if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
{
(void) AcpiOsReleaseObject (AcpiGbl_PsNodeCache, Op);
}
else
{
(void) AcpiOsReleaseObject (AcpiGbl_PsNodeExtCache, Op);
}
}
/*******************************************************************************
*
* FUNCTION: Utility functions
*
* DESCRIPTION: Low level character and object functions
*
******************************************************************************/
/*
* Is "c" a namestring lead character?
*/
BOOLEAN
AcpiPsIsLeadingChar (
UINT32 c)
{
return ((BOOLEAN) (c == '_' || (c >= 'A' && c <= 'Z')));
}
/*
* Is "c" a namestring prefix character?
*/
BOOLEAN
AcpiPsIsPrefixChar (
UINT32 c)
{
return ((BOOLEAN) (c == '\\' || c == '^'));
}
/*
* Get op's name (4-byte name segment) or 0 if unnamed
*/
UINT32
AcpiPsGetName (
ACPI_PARSE_OBJECT *Op)
{
/* The "generic" object has no name associated with it */
if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
{
return (0);
}
/* Only the "Extended" parse objects have a name */
return (Op->Named.Name);
}
/*
* Set op's name
*/
void
AcpiPsSetName (
ACPI_PARSE_OBJECT *Op,
UINT32 name)
{
/* The "generic" object has no name associated with it */
if (Op->Common.Flags & ACPI_PARSEOP_GENERIC)
{
return;
}
Op->Named.Name = name;
}