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| Current File : //sys/contrib/dev/acpica/compiler/aslopcodes.c |
/******************************************************************************
*
* Module Name: aslopcode - AML opcode generation
*
*****************************************************************************/
/*
* 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/compiler/aslcompiler.h>
#include "aslcompiler.y.h"
#include <contrib/dev/acpica/include/amlcode.h>
#define _COMPONENT ACPI_COMPILER
ACPI_MODULE_NAME ("aslopcodes")
/* 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)
{
if (!isupper ((int) InString[i]))
{
Status = AE_BAD_PARAMETER;
}
}
/* Last 4 characters must be hex digits */
else if (!isxdigit ((int) InString[i]))
{
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) ((UINT8) (InString[0] - 0x40)) << 26 |
(UINT32) ((UINT8) (InString[1] - 0x40)) << 21 |
(UINT32) ((UINT8) (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;
ACPI_PARSE_OBJECT *NewOp;
InString = (char *) Op->Asl.Value.String;
Buffer = UtLocalCalloc (16);
Status = AuValidateUuid (InString);
if (ACPI_FAILURE (Status))
{
AslError (ASL_ERROR, ASL_MSG_INVALID_UUID, Op, Op->Asl.Value.String);
}
else
{
(void) AuConvertStringToUuid (InString, Buffer);
}
/* 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;
}