/******************************************************************************
*
* Module Name: aslopcode - AML opcode generation
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, 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 "aslcompiler.h"
#include "aslcompiler.y.h"
#include "amlcode.h"
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslopcodes")
/* UUID support */
static UINT8 OpcMapToUUID[16] =
{
6,4,2,0,11,9,16,14,19,21,24,26,28,30,32,34
};
/* Local prototypes */
static void
OpcDoAccessAs (
ACPI_PARSE_OBJECT *Op);
static void
OpcDoUnicode (
ACPI_PARSE_OBJECT *Op);
static void
OpcDoEisaId (
ACPI_PARSE_OBJECT *Op);
static void
OpcDoUuId (
ACPI_PARSE_OBJECT *Op);
/*******************************************************************************
*
* FUNCTION: OpcAmlOpcodeUpdateWalk
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Opcode update walk, ascending callback
*
******************************************************************************/
ACPI_STATUS
OpcAmlOpcodeUpdateWalk (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
/*
* Handle the Package() case where the actual opcode cannot be determined
* until the PackageLength operand has been folded and minimized.
* (PackageOp versus VarPackageOp)
*
* This is (as of ACPI 3.0) the only case where the AML opcode can change
* based upon the value of a parameter.
*
* The parser always inserts a VarPackage opcode, which can possibly be
* optimized to a Package opcode.
*/
if (Op->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)
{
OpnDoPackage (Op);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: OpcAmlOpcodeWalk
*
* PARAMETERS: ASL_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Parse tree walk to generate both the AML opcodes and the AML
* operands.
*
******************************************************************************/
ACPI_STATUS
OpcAmlOpcodeWalk (
ACPI_PARSE_OBJECT *Op,
UINT32 Level,
void *Context)
{
TotalParseNodes++;
OpcGenerateAmlOpcode (Op);
OpnGenerateAmlOperands (Op);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: OpcGetIntegerWidth
*
* PARAMETERS: Op - DEFINITION BLOCK op
*
* RETURN: none
*
* DESCRIPTION: Extract integer width from the table revision
*
******************************************************************************/
void
OpcGetIntegerWidth (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Child;
if (!Op)
{
return;
}
if (Gbl_RevisionOverride)
{
AcpiUtSetIntegerWidth (Gbl_RevisionOverride);
}
else
{
Child = Op->Asl.Child;
Child = Child->Asl.Next;
Child = Child->Asl.Next;
/* Use the revision to set the integer width */
AcpiUtSetIntegerWidth ((UINT8) Child->Asl.Value.Integer);
}
}
/*******************************************************************************
*
* FUNCTION: OpcSetOptimalIntegerSize
*
* PARAMETERS: Op - A parse tree node
*
* RETURN: Integer width, in bytes. Also sets the node AML opcode to the
* optimal integer AML prefix opcode.
*
* DESCRIPTION: Determine the optimal AML encoding of an integer. All leading
* zeros can be truncated to squeeze the integer into the
* minimal number of AML bytes.
*
******************************************************************************/
UINT32
OpcSetOptimalIntegerSize (
ACPI_PARSE_OBJECT *Op)
{
#if 0
/*
* TBD: - we don't want to optimize integers in the block header, but the
* code below does not work correctly.
*/
if (Op->Asl.Parent &&
Op->Asl.Parent->Asl.Parent &&
(Op->Asl.Parent->Asl.Parent->Asl.ParseOpcode == PARSEOP_DEFINITIONBLOCK))
{
return 0;
}
#endif
/*
* Check for the special AML integers first - Zero, One, Ones.
* These are single-byte opcodes that are the smallest possible
* representation of an integer.
*
* This optimization is optional.
*/
if (Gbl_IntegerOptimizationFlag)
{
switch (Op->Asl.Value.Integer)
{
case 0:
Op->Asl.AmlOpcode = AML_ZERO_OP;
AslError (ASL_OPTIMIZATION, ASL_MSG_INTEGER_OPTIMIZATION,
Op, "Zero");
return 1;
case 1:
Op->Asl.AmlOpcode = AML_ONE_OP;
AslError (ASL_OPTIMIZATION, ASL_MSG_INTEGER_OPTIMIZATION,
Op, "One");
return 1;
case ACPI_UINT32_MAX:
/* Check for table integer width (32 or 64) */
if (AcpiGbl_IntegerByteWidth == 4)
{
Op->Asl.AmlOpcode = AML_ONES_OP;
AslError (ASL_OPTIMIZATION, ASL_MSG_INTEGER_OPTIMIZATION,
Op, "Ones");
return 1;
}
break;
case ACPI_UINT64_MAX:
/* Check for table integer width (32 or 64) */
if (AcpiGbl_IntegerByteWidth == 8)
{
Op->Asl.AmlOpcode = AML_ONES_OP;
AslError (ASL_OPTIMIZATION, ASL_MSG_INTEGER_OPTIMIZATION,
Op, "Ones");
return 1;
}
break;
default:
break;
}
}
/* Find the best fit using the various AML integer prefixes */
if (Op->Asl.Value.Integer <= ACPI_UINT8_MAX)
{
Op->Asl.AmlOpcode = AML_BYTE_OP;
return 1;
}
if (Op->Asl.Value.Integer <= ACPI_UINT16_MAX)
{
Op->Asl.AmlOpcode = AML_WORD_OP;
return 2;
}
if (Op->Asl.Value.Integer <= ACPI_UINT32_MAX)
{
Op->Asl.AmlOpcode = AML_DWORD_OP;
return 4;
}
else
{
if (AcpiGbl_IntegerByteWidth == 4)
{
AslError (ASL_WARNING, ASL_MSG_INTEGER_LENGTH,
Op, NULL);
if (!Gbl_IgnoreErrors)
{
/* Truncate the integer to 32-bit */
Op->Asl.AmlOpcode = AML_DWORD_OP;
return 4;
}
}
Op->Asl.AmlOpcode = AML_QWORD_OP;
return 8;
}
}
/*******************************************************************************
*
* FUNCTION: OpcDoAccessAs
*
* PARAMETERS: Op - Parse node
*
* RETURN: None
*
* DESCRIPTION: Implement the ACCESS_AS ASL keyword.
*
******************************************************************************/
static void
OpcDoAccessAs (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *Next;
Op->Asl.AmlOpcodeLength = 1;
Next = Op->Asl.Child;
/* First child is the access type */
Next->Asl.AmlOpcode = AML_RAW_DATA_BYTE;
Next->Asl.ParseOpcode = PARSEOP_RAW_DATA;
/* Second child is the optional access attribute */
Next = Next->Asl.Next;
if (Next->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG)
{
Next->Asl.Value.Integer = 0;
}
Next->Asl.AmlOpcode = AML_RAW_DATA_BYTE;
Next->Asl.ParseOpcode = PARSEOP_RAW_DATA;
}
/*******************************************************************************
*
* FUNCTION: OpcDoUnicode
*
* PARAMETERS: Op - Parse node
*
* RETURN: None
*
* DESCRIPTION: Implement the UNICODE ASL "macro". Convert the input string
* to a unicode buffer. There is no Unicode AML opcode.
*
* Note: The Unicode string is 16 bits per character, no leading signature,
* with a 16-bit terminating NULL.
*
******************************************************************************/
static void
OpcDoUnicode (
ACPI_PARSE_OBJECT *Op)
{
ACPI_PARSE_OBJECT *InitializerOp;
UINT32 Length;
UINT32 Count;
UINT32 i;
UINT8 *AsciiString;
UINT16 *UnicodeString;
ACPI_PARSE_OBJECT *BufferLengthOp;
/* Change op into a buffer object */
Op->Asl.CompileFlags &= ~NODE_COMPILE_TIME_CONST;
Op->Asl.ParseOpcode = PARSEOP_BUFFER;
UtSetParseOpName (Op);
/* Buffer Length is first, followed by the string */
BufferLengthOp = Op->Asl.Child;
InitializerOp = BufferLengthOp->Asl.Next;
AsciiString = (UINT8 *) InitializerOp->Asl.Value.String;
/* Create a new buffer for the Unicode string */
Count
= strlen (InitializerOp
->Asl.
Value.
String) + 1; Length = Count * sizeof (UINT16);
UnicodeString = UtLocalCalloc (Length);
/* Convert to Unicode string (including null terminator) */
for (i = 0; i < Count; i++)
{
UnicodeString[i] = (UINT16) AsciiString[i];
}
/*
* Just set the buffer size node to be the buffer length, regardless
* of whether it was previously an integer or a default_arg placeholder
*/
BufferLengthOp->Asl.ParseOpcode = PARSEOP_INTEGER;
BufferLengthOp->Asl.AmlOpcode = AML_DWORD_OP;
BufferLengthOp->Asl.Value.Integer = Length;
UtSetParseOpName (BufferLengthOp);
(void) OpcSetOptimalIntegerSize (BufferLengthOp);
/* The Unicode string is a raw data buffer */
InitializerOp->Asl.Value.Buffer = (UINT8 *) UnicodeString;
InitializerOp->Asl.AmlOpcode = AML_RAW_DATA_BUFFER;
InitializerOp->Asl.AmlLength = Length;
InitializerOp->Asl.ParseOpcode = PARSEOP_RAW_DATA;
InitializerOp->Asl.Child = NULL;
UtSetParseOpName (InitializerOp);
}
/*******************************************************************************
*
* FUNCTION: OpcDoEisaId
*
* PARAMETERS: Op - Parse node
*
* RETURN: None
*
* DESCRIPTION: Convert a string EISA ID to numeric representation. See the
* Pnp BIOS Specification for details. Here is an excerpt:
*
* A seven character ASCII representation of the product
* identifier compressed into a 32-bit identifier. The seven
* character ID consists of a three character manufacturer code,
* a three character hexadecimal product identifier, and a one
* character hexadecimal revision number. The manufacturer code
* is a 3 uppercase character code that is compressed into 3 5-bit
* values as follows:
* 1) Find hex ASCII value for each letter
* 2) Subtract 40h from each ASCII value
* 3) Retain 5 least signficant bits for each letter by
* discarding upper 3 bits because they are always 0.
* 4) Compressed code = concatenate 0 and the 3 5-bit values
*
* The format of the compressed product identifier is as follows:
* Byte 0: Bit 7 - Reserved (0)
* Bits 6-2: - 1st character of compressed mfg code
* Bits 1-0 - Upper 2 bits of 2nd character of mfg code
* Byte 1: Bits 7-5 - Lower 3 bits of 2nd character of mfg code
* Bits 4-0 - 3rd character of mfg code
* Byte 2: Bits 7-4 - 1st hex digit of product number
* Bits 3-0 - 2nd hex digit of product number
* Byte 3: Bits 7-4 - 3st hex digit of product number
* Bits 3-0 - Hex digit of the revision number
*
******************************************************************************/
static void
OpcDoEisaId (
ACPI_PARSE_OBJECT *Op)
{
UINT32 EisaId = 0;
UINT32 BigEndianId;
char *InString;
ACPI_STATUS Status = AE_OK;
UINT32 i;
InString = (char *) Op->Asl.Value.String;
/*
* The EISAID string must be exactly 7 characters and of the form
* "UUUXXXX" -- 3 uppercase letters and 4 hex digits (e.g., "PNP0001")
*/
if (ACPI_STRLEN (InString) != 7)
{
Status = AE_BAD_PARAMETER;
}
else
{
/* Check all 7 characters for correct format */
for (i = 0; i < 7; i++)
{
/* First 3 characters must be uppercase letters */
if (i < 3)
{
{
Status = AE_BAD_PARAMETER;
}
}
/* Last 4 characters must be hex digits */
{
Status = AE_BAD_PARAMETER;
}
}
}
if (ACPI_FAILURE (Status))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_EISAID, Op, Op->Asl.Value.String);
}
else
{
/* Create ID big-endian first (bits are contiguous) */
BigEndianId =
(UINT32) (InString[0] - 0x40) << 26 |
(UINT32) (InString[1] - 0x40) << 21 |
(UINT32) (InString[2] - 0x40) << 16 |
(UtHexCharToValue (InString[3])) << 12 |
(UtHexCharToValue (InString[4])) << 8 |
(UtHexCharToValue (InString[5])) << 4 |
UtHexCharToValue (InString[6]);
/* Swap to little-endian to get final ID (see function header) */
EisaId = AcpiUtDwordByteSwap (BigEndianId);
}
/*
* Morph the Op into an integer, regardless of whether there
* was an error in the EISAID string
*/
Op->Asl.Value.Integer = EisaId;
Op->Asl.CompileFlags &= ~NODE_COMPILE_TIME_CONST;
Op->Asl.ParseOpcode = PARSEOP_INTEGER;
(void) OpcSetOptimalIntegerSize (Op);
/* Op is now an integer */
UtSetParseOpName (Op);
}
/*******************************************************************************
*
* FUNCTION: OpcDoUiId
*
* PARAMETERS: Op - Parse node
*
* RETURN: None
*
* DESCRIPTION: Convert UUID string to 16-byte buffer
*
******************************************************************************/
static void
OpcDoUuId (
ACPI_PARSE_OBJECT *Op)
{
char *InString;
char *Buffer;
ACPI_STATUS Status = AE_OK;
UINT32 i;
ACPI_PARSE_OBJECT *NewOp;
InString = (char *) Op->Asl.Value.String;
if (ACPI_STRLEN (InString) != 36)
{
Status = AE_BAD_PARAMETER;
}
else
{
/* Check all 36 characters for correct format */
for (i = 0; i < 36; i++)
{
if ((i == 8) || (i == 13) || (i == 18) || (i == 23))
{
if (InString[i] != '-')
{
Status = AE_BAD_PARAMETER;
}
}
else
{
{
Status = AE_BAD_PARAMETER;
}
}
}
}
Buffer = UtLocalCalloc (16);
if (ACPI_FAILURE (Status))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_UUID, Op, Op->Asl.Value.String);
}
else for (i = 0; i < 16; i++)
{
Buffer[i] = (char) (UtHexCharToValue (InString[OpcMapToUUID[i]]) << 4);
Buffer[i] |= (char) UtHexCharToValue (InString[OpcMapToUUID[i] + 1]);
}
/* Change Op to a Buffer */
Op->Asl.ParseOpcode = PARSEOP_BUFFER;
Op->Common.AmlOpcode = AML_BUFFER_OP;
/* Disable further optimization */
Op->Asl.CompileFlags &= ~NODE_COMPILE_TIME_CONST;
UtSetParseOpName (Op);
/* Child node is the buffer length */
NewOp = TrAllocateNode (PARSEOP_INTEGER);
NewOp->Asl.AmlOpcode = AML_BYTE_OP;
NewOp->Asl.Value.Integer = 16;
NewOp->Asl.Parent = Op;
Op->Asl.Child = NewOp;
Op = NewOp;
/* Peer to the child is the raw buffer data */
NewOp = TrAllocateNode (PARSEOP_RAW_DATA);
NewOp->Asl.AmlOpcode = AML_RAW_DATA_BUFFER;
NewOp->Asl.AmlLength = 16;
NewOp->Asl.Value.String = (char *) Buffer;
NewOp->Asl.Parent = Op->Asl.Parent;
Op->Asl.Next = NewOp;
}
/*******************************************************************************
*
* FUNCTION: OpcGenerateAmlOpcode
*
* PARAMETERS: Op - Parse node
*
* RETURN: None
*
* DESCRIPTION: Generate the AML opcode associated with the node and its
* parse (lex/flex) keyword opcode. Essentially implements
* a mapping between the parse opcodes and the actual AML opcodes.
*
******************************************************************************/
void
OpcGenerateAmlOpcode (
ACPI_PARSE_OBJECT *Op)
{
UINT16 Index;
Index = (UINT16) (Op->Asl.ParseOpcode - ASL_PARSE_OPCODE_BASE);
Op->Asl.AmlOpcode = AslKeywordMapping[Index].AmlOpcode;
Op->Asl.AcpiBtype = AslKeywordMapping[Index].AcpiBtype;
Op->Asl.CompileFlags |= AslKeywordMapping[Index].Flags;
if (!Op->Asl.Value.Integer)
{
Op->Asl.Value.Integer = AslKeywordMapping[Index].Value;
}
/* Special handling for some opcodes */
switch (Op->Asl.ParseOpcode)
{
case PARSEOP_INTEGER:
/*
* Set the opcode based on the size of the integer
*/
(void) OpcSetOptimalIntegerSize (Op);
break;
case PARSEOP_OFFSET:
Op->Asl.AmlOpcodeLength = 1;
break;
case PARSEOP_ACCESSAS:
OpcDoAccessAs (Op);
break;
case PARSEOP_EISAID:
OpcDoEisaId (Op);
break;
case PARSEOP_TOUUID:
OpcDoUuId (Op);
break;
case PARSEOP_UNICODE:
OpcDoUnicode (Op);
break;
case PARSEOP_INCLUDE:
Op->Asl.Child->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
Gbl_HasIncludeFiles = TRUE;
break;
case PARSEOP_EXTERNAL:
Op->Asl.Child->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
Op->Asl.Child->Asl.Next->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG;
break;
default:
/* Nothing to do for other opcodes */
break;
}
return;
}