NetBSD-5.0.2/sys/dist/acpica/dmbuffer.c
/*******************************************************************************
*
* Module Name: dmbuffer - AML disassembler, buffer and string support
* $Revision: 1.4 $
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, 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 "acdisasm.h"
#include "acparser.h"
#include "amlcode.h"
#ifdef ACPI_DISASSEMBLER
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME ("dmbuffer")
/* Local prototypes */
static void
AcpiDmUnicode (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: AcpiDmDisasmByteList
*
* PARAMETERS: Level - Current source code indentation level
* ByteData - Pointer to the byte list
* ByteCount - Length of the byte list
*
* RETURN: None
*
* DESCRIPTION: Dump an AML "ByteList" in Hex format. 8 bytes per line, prefixed
* with the hex buffer offset.
*
******************************************************************************/
void
AcpiDmDisasmByteList (
UINT32 Level,
UINT8 *ByteData,
UINT32 ByteCount)
{
UINT32 i;
if (!ByteCount)
{
return;
}
/* Dump the byte list */
for (i = 0; i < ByteCount; i++)
{
/* New line every 8 bytes */
if (((i % 8) == 0) && (i < ByteCount))
{
if (i > 0)
{
AcpiOsPrintf ("\n");
}
AcpiDmIndent (Level);
if (ByteCount > 7)
{
AcpiOsPrintf ("/* %04X */ ", i);
}
}
AcpiOsPrintf ("0x%2.2X", (UINT32) ByteData[i]);
/* Add comma if there are more bytes to display */
if (i < (ByteCount -1))
{
AcpiOsPrintf (", ");
}
}
if (Level)
{
AcpiOsPrintf ("\n");
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmByteList
*
* PARAMETERS: Info - Parse tree walk info
* Op - Byte list op
*
* RETURN: None
*
* DESCRIPTION: Dump a buffer byte list, handling the various types of buffers.
* Buffer type must be already set in the Op DisasmOpcode.
*
******************************************************************************/
void
AcpiDmByteList (
ACPI_OP_WALK_INFO *Info,
ACPI_PARSE_OBJECT *Op)
{
UINT8 *ByteData;
UINT32 ByteCount;
ByteData = Op->Named.Data;
ByteCount = (UINT32) Op->Common.Value.Integer;
/*
* The byte list belongs to a buffer, and can be produced by either
* a ResourceTemplate, Unicode, quoted string, or a plain byte list.
*/
switch (Op->Common.Parent->Common.DisasmOpcode)
{
case ACPI_DASM_RESOURCE:
AcpiDmResourceTemplate (Info, Op->Common.Parent, ByteData, ByteCount);
break;
case ACPI_DASM_STRING:
AcpiDmIndent (Info->Level);
AcpiUtPrintString ((char *) ByteData, ACPI_UINT8_MAX);
AcpiOsPrintf ("\n");
break;
case ACPI_DASM_UNICODE:
AcpiDmUnicode (Op);
break;
case ACPI_DASM_BUFFER:
default:
/*
* Not a resource, string, or unicode string.
* Just dump the buffer
*/
AcpiDmDisasmByteList (Info->Level, ByteData, ByteCount);
break;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsUnicodeBuffer
*
* PARAMETERS: Op - Buffer Object to be examined
*
* RETURN: TRUE if buffer contains a UNICODE string
*
* DESCRIPTION: Determine if a buffer Op contains a Unicode string
*
******************************************************************************/
BOOLEAN
AcpiDmIsUnicodeBuffer (
ACPI_PARSE_OBJECT *Op)
{
UINT8 *ByteData;
UINT32 ByteCount;
UINT32 WordCount;
ACPI_PARSE_OBJECT *SizeOp;
ACPI_PARSE_OBJECT *NextOp;
ACPI_NATIVE_UINT i;
/* Buffer size is the buffer argument */
SizeOp = Op->Common.Value.Arg;
/* Next, the initializer byte list to examine */
NextOp = SizeOp->Common.Next;
if (!NextOp)
{
return (FALSE);
}
/* Extract the byte list info */
ByteData = NextOp->Named.Data;
ByteCount = (UINT32) NextOp->Common.Value.Integer;
WordCount = ACPI_DIV_2 (ByteCount);
/*
* Unicode string must have an even number of bytes and last
* word must be zero
*/
if ((!ByteCount) ||
(ByteCount < 4) ||
(ByteCount & 1) ||
((UINT16 *) (void *) ByteData)[WordCount - 1] != 0)
{
return (FALSE);
}
/* For each word, 1st byte must be ascii, 2nd byte must be zero */
for (i = 0; i < (ByteCount - 2); i += 2)
{
if ((!ACPI_IS_PRINT (ByteData[i])) ||
(ByteData[i + 1] != 0))
{
return (FALSE);
}
}
/* Ignore the Size argument in the disassembly of this buffer op */
SizeOp->Common.DisasmFlags |= ACPI_PARSEOP_IGNORE;
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsStringBuffer
*
* PARAMETERS: Op - Buffer Object to be examined
*
* RETURN: TRUE if buffer contains a ASCII string, FALSE otherwise
*
* DESCRIPTION: Determine if a buffer Op contains a ASCII string
*
******************************************************************************/
BOOLEAN
AcpiDmIsStringBuffer (
ACPI_PARSE_OBJECT *Op)
{
UINT8 *ByteData;
UINT32 ByteCount;
ACPI_PARSE_OBJECT *SizeOp;
ACPI_PARSE_OBJECT *NextOp;
UINT32 i;
/* Buffer size is the buffer argument */
SizeOp = Op->Common.Value.Arg;
/* Next, the initializer byte list to examine */
NextOp = SizeOp->Common.Next;
if (!NextOp)
{
return (FALSE);
}
/* Extract the byte list info */
ByteData = NextOp->Named.Data;
ByteCount = (UINT32) NextOp->Common.Value.Integer;
/* Last byte must be the null terminator */
if ((!ByteCount) ||
(ByteCount < 2) ||
(ByteData[ByteCount-1] != 0))
{
return (FALSE);
}
for (i = 0; i < (ByteCount - 1); i++)
{
/* TBD: allow some escapes (non-ascii chars).
* they will be handled in the string output routine
*/
if (!ACPI_IS_PRINT (ByteData[i]))
{
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiDmUnicode
*
* PARAMETERS: Op - Byte List op containing Unicode string
*
* RETURN: None
*
* DESCRIPTION: Dump Unicode string as a standard ASCII string. (Remove
* the extra zero bytes).
*
******************************************************************************/
static void
AcpiDmUnicode (
ACPI_PARSE_OBJECT *Op)
{
UINT16 *WordData;
UINT32 WordCount;
UINT32 i;
/* Extract the buffer info as a WORD buffer */
WordData = ACPI_CAST_PTR (UINT16, Op->Named.Data);
WordCount = ACPI_DIV_2 (((UINT32) Op->Common.Value.Integer));
AcpiOsPrintf ("\"");
/* Write every other byte as an ASCII character */
for (i = 0; i < (WordCount - 1); i++)
{
AcpiOsPrintf ("%c", (int) WordData[i]);
}
AcpiOsPrintf ("\")");
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsEisaId
*
* PARAMETERS: Op - Op to be examined
*
* RETURN: None
*
* DESCRIPTION: Determine if an Op can be converted to an EisaId.
*
******************************************************************************/
void
AcpiDmIsEisaId (
ACPI_PARSE_OBJECT *Op)
{
UINT32 Name;
UINT32 BigEndianId;
ACPI_PARSE_OBJECT *NextOp;
ACPI_NATIVE_UINT i;
UINT32 Prefix[3];
/* Get the NameSegment */
Name = AcpiPsGetName (Op);
if (!Name)
{
return;
}
/* We are looking for _HID */
if (!ACPI_COMPARE_NAME (&Name, METHOD_NAME__HID))
{
return;
}
/* The parameter must be either a word or a dword */
NextOp = AcpiPsGetDepthNext (NULL, Op);
if ((NextOp->Common.AmlOpcode != AML_DWORD_OP) &&
(NextOp->Common.AmlOpcode != AML_WORD_OP))
{
return;
}
/* Swap from little-endian to big-endian to simplify conversion */
BigEndianId = AcpiUtDwordByteSwap ((UINT32) NextOp->Common.Value.Integer);
/* Create the 3 leading ASCII letters */
Prefix[0] = ((BigEndianId >> 26) & 0x1F) + 0x40;
Prefix[1] = ((BigEndianId >> 21) & 0x1F) + 0x40;
Prefix[2] = ((BigEndianId >> 16) & 0x1F) + 0x40;
/* Verify that all 3 are ascii and alpha */
for (i = 0; i < 3; i++)
{
if (!ACPI_IS_ASCII (Prefix[i]) ||
!ACPI_IS_ALPHA (Prefix[i]))
{
return;
}
}
/* OK - mark this node as convertable to an EISA ID */
NextOp->Common.DisasmOpcode = ACPI_DASM_EISAID;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmEisaId
*
* PARAMETERS: EncodedId - Raw encoded EISA ID.
*
* RETURN: None
*
* DESCRIPTION: Convert an encoded EISAID back to the original ASCII String.
*
******************************************************************************/
void
AcpiDmEisaId (
UINT32 EncodedId)
{
UINT32 BigEndianId;
/* Swap from little-endian to big-endian to simplify conversion */
BigEndianId = AcpiUtDwordByteSwap (EncodedId);
/* Split to form "AAANNNN" string */
AcpiOsPrintf ("EisaId (\"%c%c%c%4.4X\")",
/* Three Alpha characters (AAA), 5 bits each */
(int) ((BigEndianId >> 26) & 0x1F) + 0x40,
(int) ((BigEndianId >> 21) & 0x1F) + 0x40,
(int) ((BigEndianId >> 16) & 0x1F) + 0x40,
/* Numeric part (NNNN) is simply the lower 16 bits */
(UINT32) (BigEndianId & 0xFFFF));
}
#endif