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freebsd-dev/sys/contrib/dev/acpica/psutils.c
Mike Smith 926328c406 Initial import of the Intel-maintained ACPI Component Architecture. This 
is Intel's reference implementation of the core operating-system ACPI
support.  (This import is on the vendor branch.)
2000-10-28 05:01:06 +00:00

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/******************************************************************************
*
* Module Name: psutils - Parser miscellaneous utilities (Parser only)
* $Revision: 30 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 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 "acparser.h"
#include "amlcode.h"
#define _COMPONENT PARSER
MODULE_NAME ("psutils")
#define PARSEOP_GENERIC 0x01
#define PARSEOP_NAMED 0x02
#define PARSEOP_DEFERRED 0x03
#define PARSEOP_BYTELIST 0x04
#define PARSEOP_IN_CACHE 0x80
/*******************************************************************************
*
* FUNCTION: AcpiPsInitOp
*
* PARAMETERS: Op - A newly allocated Op object
* Opcode - Opcode to store in the Op
*
* RETURN: Status
*
* DESCRIPTION: Allocate an acpi_op, choose op type (and thus size) based on
* opcode
*
******************************************************************************/
void
AcpiPsInitOp (
ACPI_PARSE_OBJECT *Op,
UINT16 Opcode)
{
ACPI_OPCODE_INFO *AmlOp;
Op->DataType = ACPI_DESC_TYPE_PARSER;
Op->Opcode = Opcode;
AmlOp = AcpiPsGetOpcodeInfo (Opcode);
DEBUG_ONLY_MEMBERS (STRNCPY (Op->OpName, AmlOp->Name,
sizeof (Op->OpName)));
}
/*******************************************************************************
*
* FUNCTION: AcpiPsAllocOp
*
* PARAMETERS: Opcode - Opcode that will be stored in the new Op
*
* RETURN: Pointer to the new Op.
*
* 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 = NULL;
UINT32 Size;
UINT8 Flags;
/* Allocate the minimum required size object */
if (AcpiPsIsDeferredOp (Opcode))
{
Size = sizeof (ACPI_PARSE2_OBJECT);
Flags = PARSEOP_DEFERRED;
}
else if (AcpiPsIsNamedOp (Opcode))
{
Size = sizeof (ACPI_PARSE2_OBJECT);
Flags = PARSEOP_NAMED;
}
else if (AcpiPsIsBytelistOp (Opcode))
{
Size = sizeof (ACPI_PARSE2_OBJECT);
Flags = PARSEOP_BYTELIST;
}
else
{
Size = sizeof (ACPI_PARSE_OBJECT);
Flags = PARSEOP_GENERIC;
}
if (Size == sizeof (ACPI_PARSE_OBJECT))
{
/*
* The generic op is by far the most common (16 to 1), and therefore
* the op cache is implemented with this type.
*
* Check if there is an Op already available in the cache
*/
AcpiCmAcquireMutex (ACPI_MTX_CACHES);
AcpiGbl_ParseCacheRequests++;
if (AcpiGbl_ParseCache)
{
/* Extract an op from the front of the cache list */
AcpiGbl_ParseCacheDepth--;
AcpiGbl_ParseCacheHits++;
Op = AcpiGbl_ParseCache;
AcpiGbl_ParseCache = Op->Next;
if (Op->DataType == 0xFF)
{
DEBUG_PRINT (ACPI_ERROR, ("Op %p deleted while in cache!\n", Op));
}
/* Clear the previously used Op */
MEMSET (Op, 0, sizeof (ACPI_PARSE_OBJECT));
DEBUG_PRINT (TRACE_PARSE,
("PsAllocOp: Op %p from Parse Cache\n", Op));
}
AcpiCmReleaseMutex (ACPI_MTX_CACHES);
}
else
{
/*
* The generic op is by far the most common (16 to 1), and therefore
* the op cache is implemented with this type.
*
* Check if there is an Op already available in the cache
*/
AcpiCmAcquireMutex (ACPI_MTX_CACHES);
AcpiGbl_ExtParseCacheRequests++;
if (AcpiGbl_ExtParseCache)
{
/* Extract an op from the front of the cache list */
AcpiGbl_ExtParseCacheDepth--;
AcpiGbl_ExtParseCacheHits++;
Op = (ACPI_PARSE_OBJECT *) AcpiGbl_ExtParseCache;
AcpiGbl_ExtParseCache = (ACPI_PARSE2_OBJECT *) Op->Next;
if (Op->DataType == 0xFF)
{
DEBUG_PRINT (ACPI_ERROR, ("Op %p deleted while in cache!\n", Op));
}
/* Clear the previously used Op */
MEMSET (Op, 0, sizeof (ACPI_PARSE2_OBJECT));
DEBUG_PRINT (TRACE_PARSE,
("PsAllocOp: Op %p from ExtParse Cache\n", Op));
}
AcpiCmReleaseMutex (ACPI_MTX_CACHES);
}
/* Allocate a new Op if necessary */
if (!Op)
{
Op = AcpiCmCallocate (Size);
}
/* Initialize the Op */
if (Op)
{
AcpiPsInitOp (Op, Opcode);
Op->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)
{
if (Op->Opcode == AML_RETURN_VALUE_OP)
{
DEBUG_PRINT (ACPI_INFO, ("Free retval op: %p\n", Op));
}
if (Op->Flags == PARSEOP_GENERIC)
{
/* Is the cache full? */
if (AcpiGbl_ParseCacheDepth < MAX_PARSE_CACHE_DEPTH)
{
/* Put a GENERIC_OP back into the cache */
/* Clear the previously used Op */
MEMSET (Op, 0, sizeof (ACPI_PARSE_OBJECT));
Op->Flags = PARSEOP_IN_CACHE;
AcpiCmAcquireMutex (ACPI_MTX_CACHES);
AcpiGbl_ParseCacheDepth++;
Op->Next = AcpiGbl_ParseCache;
AcpiGbl_ParseCache = Op;
AcpiCmReleaseMutex (ACPI_MTX_CACHES);
return;
}
}
else
{
/* Is the cache full? */
if (AcpiGbl_ExtParseCacheDepth < MAX_EXTPARSE_CACHE_DEPTH)
{
/* Put a GENERIC_OP back into the cache */
/* Clear the previously used Op */
MEMSET (Op, 0, sizeof (ACPI_PARSE2_OBJECT));
Op->Flags = PARSEOP_IN_CACHE;
AcpiCmAcquireMutex (ACPI_MTX_CACHES);
AcpiGbl_ExtParseCacheDepth++;
Op->Next = (ACPI_PARSE_OBJECT *) AcpiGbl_ExtParseCache;
AcpiGbl_ExtParseCache = (ACPI_PARSE2_OBJECT *) Op;
AcpiCmReleaseMutex (ACPI_MTX_CACHES);
return;
}
}
/*
* Not a GENERIC OP, or the cache is full, just free the Op
*/
AcpiCmFree (Op);
}
/*******************************************************************************
*
* FUNCTION: AcpiPsDeleteParseCache
*
* PARAMETERS: None
*
* RETURN: None
*
* DESCRIPTION: Free all objects that are on the parse cache list.
*
******************************************************************************/
void
AcpiPsDeleteParseCache (
void)
{
ACPI_PARSE_OBJECT *Next;
FUNCTION_TRACE ("PsDeleteParseCache");
/* Traverse the global cache list */
while (AcpiGbl_ParseCache)
{
/* Delete one cached state object */
Next = AcpiGbl_ParseCache->Next;
AcpiCmFree (AcpiGbl_ParseCache);
AcpiGbl_ParseCache = Next;
AcpiGbl_ParseCacheDepth--;
}
/* Traverse the global cache list */
while (AcpiGbl_ExtParseCache)
{
/* Delete one cached state object */
Next = AcpiGbl_ExtParseCache->Next;
AcpiCmFree (AcpiGbl_ExtParseCache);
AcpiGbl_ExtParseCache = (ACPI_PARSE2_OBJECT *) Next;
AcpiGbl_ExtParseCacheDepth--;
}
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: Utility functions
*
* DESCRIPTION: Low level functions
*
* TBD: [Restructure]
* 1) Some of these functions should be macros
* 2) Some can be simplified
*
******************************************************************************/
/*
* 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 == '^'));
}
BOOLEAN
AcpiPsIsNamespaceObjectOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_SCOPE_OP ||
Opcode == AML_DEVICE_OP ||
Opcode == AML_THERMAL_ZONE_OP ||
Opcode == AML_METHOD_OP ||
Opcode == AML_POWER_RES_OP ||
Opcode == AML_PROCESSOR_OP ||
Opcode == AML_DEF_FIELD_OP ||
Opcode == AML_INDEX_FIELD_OP ||
Opcode == AML_BANK_FIELD_OP ||
Opcode == AML_NAMEDFIELD_OP ||
Opcode == AML_NAME_OP ||
Opcode == AML_ALIAS_OP ||
Opcode == AML_MUTEX_OP ||
Opcode == AML_EVENT_OP ||
Opcode == AML_REGION_OP ||
Opcode == AML_CREATE_FIELD_OP ||
Opcode == AML_BIT_FIELD_OP ||
Opcode == AML_BYTE_FIELD_OP ||
Opcode == AML_WORD_FIELD_OP ||
Opcode == AML_DWORD_FIELD_OP ||
Opcode == AML_METHODCALL_OP ||
Opcode == AML_NAMEPATH_OP));
}
BOOLEAN
AcpiPsIsNamespaceOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_SCOPE_OP ||
Opcode == AML_DEVICE_OP ||
Opcode == AML_THERMAL_ZONE_OP ||
Opcode == AML_METHOD_OP ||
Opcode == AML_POWER_RES_OP ||
Opcode == AML_PROCESSOR_OP ||
Opcode == AML_DEF_FIELD_OP ||
Opcode == AML_INDEX_FIELD_OP ||
Opcode == AML_BANK_FIELD_OP ||
Opcode == AML_NAME_OP ||
Opcode == AML_ALIAS_OP ||
Opcode == AML_MUTEX_OP ||
Opcode == AML_EVENT_OP ||
Opcode == AML_REGION_OP ||
Opcode == AML_NAMEDFIELD_OP));
}
/*
* Is opcode for a named object Op?
* (Includes all named object opcodes)
*
* TBD: [Restructure] Need a better way than this brute force approach!
*/
BOOLEAN
AcpiPsIsNodeOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_SCOPE_OP ||
Opcode == AML_DEVICE_OP ||
Opcode == AML_THERMAL_ZONE_OP ||
Opcode == AML_METHOD_OP ||
Opcode == AML_POWER_RES_OP ||
Opcode == AML_PROCESSOR_OP ||
Opcode == AML_NAMEDFIELD_OP ||
Opcode == AML_NAME_OP ||
Opcode == AML_ALIAS_OP ||
Opcode == AML_MUTEX_OP ||
Opcode == AML_EVENT_OP ||
Opcode == AML_REGION_OP ||
Opcode == AML_CREATE_FIELD_OP ||
Opcode == AML_BIT_FIELD_OP ||
Opcode == AML_BYTE_FIELD_OP ||
Opcode == AML_WORD_FIELD_OP ||
Opcode == AML_DWORD_FIELD_OP ||
Opcode == AML_METHODCALL_OP ||
Opcode == AML_NAMEPATH_OP));
}
/*
* Is opcode for a named Op?
*/
BOOLEAN
AcpiPsIsNamedOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_SCOPE_OP ||
Opcode == AML_DEVICE_OP ||
Opcode == AML_THERMAL_ZONE_OP ||
Opcode == AML_METHOD_OP ||
Opcode == AML_POWER_RES_OP ||
Opcode == AML_PROCESSOR_OP ||
Opcode == AML_NAME_OP ||
Opcode == AML_ALIAS_OP ||
Opcode == AML_MUTEX_OP ||
Opcode == AML_EVENT_OP ||
Opcode == AML_REGION_OP ||
Opcode == AML_NAMEDFIELD_OP));
}
BOOLEAN
AcpiPsIsDeferredOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_METHOD_OP ||
Opcode == AML_CREATE_FIELD_OP ||
Opcode == AML_BIT_FIELD_OP ||
Opcode == AML_BYTE_FIELD_OP ||
Opcode == AML_WORD_FIELD_OP ||
Opcode == AML_DWORD_FIELD_OP ||
Opcode == AML_REGION_OP));
}
/*
* Is opcode for a bytelist?
*/
BOOLEAN
AcpiPsIsBytelistOp (
UINT16 Opcode)
{
return ((BOOLEAN) (Opcode == AML_BYTELIST_OP));
}
/*
* Is opcode for a Field, IndexField, or BankField
*/
BOOLEAN
AcpiPsIsFieldOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_CREATE_FIELD_OP
|| Opcode == AML_DEF_FIELD_OP
|| Opcode == AML_INDEX_FIELD_OP
|| Opcode == AML_BANK_FIELD_OP));
}
/*
* Is field creation op
*/
BOOLEAN
AcpiPsIsCreateFieldOp (
UINT16 Opcode)
{
return ((BOOLEAN)
(Opcode == AML_CREATE_FIELD_OP ||
Opcode == AML_BIT_FIELD_OP ||
Opcode == AML_BYTE_FIELD_OP ||
Opcode == AML_WORD_FIELD_OP ||
Opcode == AML_DWORD_FIELD_OP));
}
/*
* Cast an acpi_op to an acpi_extended_op if possible
*/
/* TBD: This is very inefficient, fix */
ACPI_PARSE2_OBJECT *
AcpiPsToExtendedOp (
ACPI_PARSE_OBJECT *Op)
{
return ((AcpiPsIsDeferredOp (Op->Opcode) || AcpiPsIsNamedOp (Op->Opcode) || AcpiPsIsBytelistOp (Op->Opcode))
? ( (ACPI_PARSE2_OBJECT *) Op) : NULL);
}
/*
* Get op's name (4-byte name segment) or 0 if unnamed
*/
UINT32
AcpiPsGetName (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE2_OBJECT *Named = AcpiPsToExtendedOp (Op);
return (Named ? Named->Name : 0);
}
/*
* Set op's name
*/
void
AcpiPsSetName (
ACPI_PARSE_OBJECT *Op,
UINT32 name)
{
ACPI_PARSE2_OBJECT *Named = AcpiPsToExtendedOp (Op);
if (Named)
{
Named->Name = name;
}
}
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