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| Current File : //sys/contrib/dev/acpica/disassembler/dmbuffer.c |
/*******************************************************************************
*
* Module Name: dmbuffer - AML disassembler, buffer and string support
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2011, 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/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acdisasm.h>
#include <contrib/dev/acpica/include/acparser.h>
#include <contrib/dev/acpica/include/amlcode.h>
#ifdef ACPI_DISASSEMBLER
#define _COMPONENT ACPI_CA_DEBUGGER
ACPI_MODULE_NAME ("dmbuffer")
/* Local prototypes */
static void
AcpiDmUnicode (
ACPI_PARSE_OBJECT *Op);
static void
AcpiDmIsEisaIdElement (
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;
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;
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[(ACPI_SIZE) 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: AcpiDmIsEisaIdElement
*
* PARAMETERS: Op - Op to be examined
*
* RETURN: None
*
* DESCRIPTION: Determine if an Op (argument to _HID or _CID) can be converted
* to an EISA ID.
*
******************************************************************************/
static void
AcpiDmIsEisaIdElement (
ACPI_PARSE_OBJECT *Op)
{
UINT32 BigEndianId;
UINT32 Prefix[3];
UINT32 i;
/* The parameter must be either a word or a dword */
if ((Op->Common.AmlOpcode != AML_DWORD_OP) &&
(Op->Common.AmlOpcode != AML_WORD_OP))
{
return;
}
/* Swap from little-endian to big-endian to simplify conversion */
BigEndianId = AcpiUtDwordByteSwap ((UINT32) Op->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 */
Op->Common.DisasmOpcode = ACPI_DASM_EISAID;
}
/*******************************************************************************
*
* FUNCTION: AcpiDmIsEisaId
*
* PARAMETERS: Op - Op to be examined
*
* RETURN: None
*
* DESCRIPTION: Determine if a Name() Op can be converted to an EisaId.
*
******************************************************************************/
void
AcpiDmIsEisaId (
ACPI_PARSE_OBJECT *Op)
{
UINT32 Name;
ACPI_PARSE_OBJECT *NextOp;
/* Get the NameSegment */
Name = AcpiPsGetName (Op);
if (!Name)
{
return;
}
NextOp = AcpiPsGetDepthNext (NULL, Op);
if (!NextOp)
{
return;
}
/* Check for _HID - has one argument */
if (ACPI_COMPARE_NAME (&Name, METHOD_NAME__HID))
{
AcpiDmIsEisaIdElement (NextOp);
return;
}
/* Exit if not _CID */
if (!ACPI_COMPARE_NAME (&Name, METHOD_NAME__CID))
{
return;
}
/* _CID can contain a single argument or a package */
if (NextOp->Common.AmlOpcode != AML_PACKAGE_OP)
{
AcpiDmIsEisaIdElement (NextOp);
return;
}
/* _CID with Package: get the package length */
NextOp = AcpiPsGetDepthNext (NULL, NextOp);
/* Don't need to use the length, just walk the peer list */
NextOp = NextOp->Common.Next;
while (NextOp)
{
AcpiDmIsEisaIdElement (NextOp);
NextOp = NextOp->Common.Next;
}
}
/*******************************************************************************
*
* 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