934 lines
25 KiB
C
934 lines
25 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: psargs - Parse AML opcode arguments
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2014, 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 "acpi.h"
|
|
#include "accommon.h"
|
|
#include "acparser.h"
|
|
#include "amlcode.h"
|
|
#include "acnamesp.h"
|
|
#include "acdispat.h"
|
|
|
|
#define _COMPONENT ACPI_PARSER
|
|
ACPI_MODULE_NAME ("psargs")
|
|
|
|
/* Local prototypes */
|
|
|
|
static UINT32
|
|
AcpiPsGetNextPackageLength (
|
|
ACPI_PARSE_STATE *ParserState);
|
|
|
|
static ACPI_PARSE_OBJECT *
|
|
AcpiPsGetNextField (
|
|
ACPI_PARSE_STATE *ParserState);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextPackageLength
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
*
|
|
* RETURN: Decoded package length. On completion, the AML pointer points
|
|
* past the length byte or bytes.
|
|
*
|
|
* DESCRIPTION: Decode and return a package length field.
|
|
* Note: Largest package length is 28 bits, from ACPI specification
|
|
*
|
|
******************************************************************************/
|
|
|
|
static UINT32
|
|
AcpiPsGetNextPackageLength (
|
|
ACPI_PARSE_STATE *ParserState)
|
|
{
|
|
UINT8 *Aml = ParserState->Aml;
|
|
UINT32 PackageLength = 0;
|
|
UINT32 ByteCount;
|
|
UINT8 ByteZeroMask = 0x3F; /* Default [0:5] */
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (PsGetNextPackageLength);
|
|
|
|
|
|
/*
|
|
* Byte 0 bits [6:7] contain the number of additional bytes
|
|
* used to encode the package length, either 0,1,2, or 3
|
|
*/
|
|
ByteCount = (Aml[0] >> 6);
|
|
ParserState->Aml += ((ACPI_SIZE) ByteCount + 1);
|
|
|
|
/* Get bytes 3, 2, 1 as needed */
|
|
|
|
while (ByteCount)
|
|
{
|
|
/*
|
|
* Final bit positions for the package length bytes:
|
|
* Byte3->[20:27]
|
|
* Byte2->[12:19]
|
|
* Byte1->[04:11]
|
|
* Byte0->[00:03]
|
|
*/
|
|
PackageLength |= (Aml[ByteCount] << ((ByteCount << 3) - 4));
|
|
|
|
ByteZeroMask = 0x0F; /* Use bits [0:3] of byte 0 */
|
|
ByteCount--;
|
|
}
|
|
|
|
/* Byte 0 is a special case, either bits [0:3] or [0:5] are used */
|
|
|
|
PackageLength |= (Aml[0] & ByteZeroMask);
|
|
return_UINT32 (PackageLength);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextPackageEnd
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
*
|
|
* RETURN: Pointer to end-of-package +1
|
|
*
|
|
* DESCRIPTION: Get next package length and return a pointer past the end of
|
|
* the package. Consumes the package length field
|
|
*
|
|
******************************************************************************/
|
|
|
|
UINT8 *
|
|
AcpiPsGetNextPackageEnd (
|
|
ACPI_PARSE_STATE *ParserState)
|
|
{
|
|
UINT8 *Start = ParserState->Aml;
|
|
UINT32 PackageLength;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (PsGetNextPackageEnd);
|
|
|
|
|
|
/* Function below updates ParserState->Aml */
|
|
|
|
PackageLength = AcpiPsGetNextPackageLength (ParserState);
|
|
|
|
return_PTR (Start + PackageLength); /* end of package */
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextNamestring
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
*
|
|
* RETURN: Pointer to the start of the name string (pointer points into
|
|
* the AML.
|
|
*
|
|
* DESCRIPTION: Get next raw namestring within the AML stream. Handles all name
|
|
* prefix characters. Set parser state to point past the string.
|
|
* (Name is consumed from the AML.)
|
|
*
|
|
******************************************************************************/
|
|
|
|
char *
|
|
AcpiPsGetNextNamestring (
|
|
ACPI_PARSE_STATE *ParserState)
|
|
{
|
|
UINT8 *Start = ParserState->Aml;
|
|
UINT8 *End = ParserState->Aml;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (PsGetNextNamestring);
|
|
|
|
|
|
/* Point past any namestring prefix characters (backslash or carat) */
|
|
|
|
while (ACPI_IS_ROOT_PREFIX (*End) ||
|
|
ACPI_IS_PARENT_PREFIX (*End))
|
|
{
|
|
End++;
|
|
}
|
|
|
|
/* Decode the path prefix character */
|
|
|
|
switch (*End)
|
|
{
|
|
case 0:
|
|
|
|
/* NullName */
|
|
|
|
if (End == Start)
|
|
{
|
|
Start = NULL;
|
|
}
|
|
End++;
|
|
break;
|
|
|
|
case AML_DUAL_NAME_PREFIX:
|
|
|
|
/* Two name segments */
|
|
|
|
End += 1 + (2 * ACPI_NAME_SIZE);
|
|
break;
|
|
|
|
case AML_MULTI_NAME_PREFIX_OP:
|
|
|
|
/* Multiple name segments, 4 chars each, count in next byte */
|
|
|
|
End += 2 + (*(End + 1) * ACPI_NAME_SIZE);
|
|
break;
|
|
|
|
default:
|
|
|
|
/* Single name segment */
|
|
|
|
End += ACPI_NAME_SIZE;
|
|
break;
|
|
}
|
|
|
|
ParserState->Aml = End;
|
|
return_PTR ((char *) Start);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextNamepath
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
* Arg - Where the namepath will be stored
|
|
* ArgCount - If the namepath points to a control method
|
|
* the method's argument is returned here.
|
|
* PossibleMethodCall - Whether the namepath can possibly be the
|
|
* start of a method call
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get next name (if method call, return # of required args).
|
|
* Names are looked up in the internal namespace to determine
|
|
* if the name represents a control method. If a method
|
|
* is found, the number of arguments to the method is returned.
|
|
* This information is critical for parsing to continue correctly.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiPsGetNextNamepath (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_STATE *ParserState,
|
|
ACPI_PARSE_OBJECT *Arg,
|
|
BOOLEAN PossibleMethodCall)
|
|
{
|
|
ACPI_STATUS Status;
|
|
char *Path;
|
|
ACPI_PARSE_OBJECT *NameOp;
|
|
ACPI_OPERAND_OBJECT *MethodDesc;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
UINT8 *Start = ParserState->Aml;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (PsGetNextNamepath);
|
|
|
|
|
|
Path = AcpiPsGetNextNamestring (ParserState);
|
|
AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
|
|
|
|
/* Null path case is allowed, just exit */
|
|
|
|
if (!Path)
|
|
{
|
|
Arg->Common.Value.Name = Path;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Lookup the name in the internal namespace, starting with the current
|
|
* scope. We don't want to add anything new to the namespace here,
|
|
* however, so we use MODE_EXECUTE.
|
|
* Allow searching of the parent tree, but don't open a new scope -
|
|
* we just want to lookup the object (must be mode EXECUTE to perform
|
|
* the upsearch)
|
|
*/
|
|
Status = AcpiNsLookup (WalkState->ScopeInfo, Path,
|
|
ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
|
|
ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
|
|
|
|
/*
|
|
* If this name is a control method invocation, we must
|
|
* setup the method call
|
|
*/
|
|
if (ACPI_SUCCESS (Status) &&
|
|
PossibleMethodCall &&
|
|
(Node->Type == ACPI_TYPE_METHOD))
|
|
{
|
|
if (WalkState->Opcode == AML_UNLOAD_OP)
|
|
{
|
|
/*
|
|
* AcpiPsGetNextNamestring has increased the AML pointer,
|
|
* so we need to restore the saved AML pointer for method call.
|
|
*/
|
|
WalkState->ParserState.Aml = Start;
|
|
WalkState->ArgCount = 1;
|
|
AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/* This name is actually a control method invocation */
|
|
|
|
MethodDesc = AcpiNsGetAttachedObject (Node);
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"Control Method - %p Desc %p Path=%p\n", Node, MethodDesc, Path));
|
|
|
|
NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
|
|
if (!NameOp)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Change Arg into a METHOD CALL and attach name to it */
|
|
|
|
AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
|
|
NameOp->Common.Value.Name = Path;
|
|
|
|
/* Point METHODCALL/NAME to the METHOD Node */
|
|
|
|
NameOp->Common.Node = Node;
|
|
AcpiPsAppendArg (Arg, NameOp);
|
|
|
|
if (!MethodDesc)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Control Method %p has no attached object",
|
|
Node));
|
|
return_ACPI_STATUS (AE_AML_INTERNAL);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
|
|
"Control Method - %p Args %X\n",
|
|
Node, MethodDesc->Method.ParamCount));
|
|
|
|
/* Get the number of arguments to expect */
|
|
|
|
WalkState->ArgCount = MethodDesc->Method.ParamCount;
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Special handling if the name was not found during the lookup -
|
|
* some NotFound cases are allowed
|
|
*/
|
|
if (Status == AE_NOT_FOUND)
|
|
{
|
|
/* 1) NotFound is ok during load pass 1/2 (allow forward references) */
|
|
|
|
if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) !=
|
|
ACPI_PARSE_EXECUTE)
|
|
{
|
|
Status = AE_OK;
|
|
}
|
|
|
|
/* 2) NotFound during a CondRefOf(x) is ok by definition */
|
|
|
|
else if (WalkState->Op->Common.AmlOpcode == AML_COND_REF_OF_OP)
|
|
{
|
|
Status = AE_OK;
|
|
}
|
|
|
|
/*
|
|
* 3) NotFound while building a Package is ok at this point, we
|
|
* may flag as an error later if slack mode is not enabled.
|
|
* (Some ASL code depends on allowing this behavior)
|
|
*/
|
|
else if ((Arg->Common.Parent) &&
|
|
((Arg->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) ||
|
|
(Arg->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)))
|
|
{
|
|
Status = AE_OK;
|
|
}
|
|
}
|
|
|
|
/* Final exception check (may have been changed from code above) */
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_ERROR_NAMESPACE (Path, Status);
|
|
|
|
if ((WalkState->ParseFlags & ACPI_PARSE_MODE_MASK) ==
|
|
ACPI_PARSE_EXECUTE)
|
|
{
|
|
/* Report a control method execution error */
|
|
|
|
Status = AcpiDsMethodError (Status, WalkState);
|
|
}
|
|
}
|
|
|
|
/* Save the namepath */
|
|
|
|
Arg->Common.Value.Name = Path;
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextSimpleArg
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
* ArgType - The argument type (AML_*_ARG)
|
|
* Arg - Where the argument is returned
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Get the next simple argument (constant, string, or namestring)
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiPsGetNextSimpleArg (
|
|
ACPI_PARSE_STATE *ParserState,
|
|
UINT32 ArgType,
|
|
ACPI_PARSE_OBJECT *Arg)
|
|
{
|
|
UINT32 Length;
|
|
UINT16 Opcode;
|
|
UINT8 *Aml = ParserState->Aml;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_U32 (PsGetNextSimpleArg, ArgType);
|
|
|
|
|
|
switch (ArgType)
|
|
{
|
|
case ARGP_BYTEDATA:
|
|
|
|
/* Get 1 byte from the AML stream */
|
|
|
|
Opcode = AML_BYTE_OP;
|
|
Arg->Common.Value.Integer = (UINT64) *Aml;
|
|
Length = 1;
|
|
break;
|
|
|
|
case ARGP_WORDDATA:
|
|
|
|
/* Get 2 bytes from the AML stream */
|
|
|
|
Opcode = AML_WORD_OP;
|
|
ACPI_MOVE_16_TO_64 (&Arg->Common.Value.Integer, Aml);
|
|
Length = 2;
|
|
break;
|
|
|
|
case ARGP_DWORDDATA:
|
|
|
|
/* Get 4 bytes from the AML stream */
|
|
|
|
Opcode = AML_DWORD_OP;
|
|
ACPI_MOVE_32_TO_64 (&Arg->Common.Value.Integer, Aml);
|
|
Length = 4;
|
|
break;
|
|
|
|
case ARGP_QWORDDATA:
|
|
|
|
/* Get 8 bytes from the AML stream */
|
|
|
|
Opcode = AML_QWORD_OP;
|
|
ACPI_MOVE_64_TO_64 (&Arg->Common.Value.Integer, Aml);
|
|
Length = 8;
|
|
break;
|
|
|
|
case ARGP_CHARLIST:
|
|
|
|
/* Get a pointer to the string, point past the string */
|
|
|
|
Opcode = AML_STRING_OP;
|
|
Arg->Common.Value.String = ACPI_CAST_PTR (char, Aml);
|
|
|
|
/* Find the null terminator */
|
|
|
|
Length = 0;
|
|
while (Aml[Length])
|
|
{
|
|
Length++;
|
|
}
|
|
Length++;
|
|
break;
|
|
|
|
case ARGP_NAME:
|
|
case ARGP_NAMESTRING:
|
|
|
|
AcpiPsInitOp (Arg, AML_INT_NAMEPATH_OP);
|
|
Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
|
|
return_VOID;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO, "Invalid ArgType 0x%X", ArgType));
|
|
return_VOID;
|
|
}
|
|
|
|
AcpiPsInitOp (Arg, Opcode);
|
|
ParserState->Aml += Length;
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextField
|
|
*
|
|
* PARAMETERS: ParserState - Current parser state object
|
|
*
|
|
* RETURN: A newly allocated FIELD op
|
|
*
|
|
* DESCRIPTION: Get next field (NamedField, ReservedField, or AccessField)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_PARSE_OBJECT *
|
|
AcpiPsGetNextField (
|
|
ACPI_PARSE_STATE *ParserState)
|
|
{
|
|
UINT32 AmlOffset;
|
|
ACPI_PARSE_OBJECT *Field;
|
|
ACPI_PARSE_OBJECT *Arg = NULL;
|
|
UINT16 Opcode;
|
|
UINT32 Name;
|
|
UINT8 AccessType;
|
|
UINT8 AccessAttribute;
|
|
UINT8 AccessLength;
|
|
UINT32 PkgLength;
|
|
UINT8 *PkgEnd;
|
|
UINT32 BufferLength;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (PsGetNextField);
|
|
|
|
|
|
AmlOffset = (UINT32) ACPI_PTR_DIFF (
|
|
ParserState->Aml, ParserState->AmlStart);
|
|
|
|
/* Determine field type */
|
|
|
|
switch (ACPI_GET8 (ParserState->Aml))
|
|
{
|
|
case AML_FIELD_OFFSET_OP:
|
|
|
|
Opcode = AML_INT_RESERVEDFIELD_OP;
|
|
ParserState->Aml++;
|
|
break;
|
|
|
|
case AML_FIELD_ACCESS_OP:
|
|
|
|
Opcode = AML_INT_ACCESSFIELD_OP;
|
|
ParserState->Aml++;
|
|
break;
|
|
|
|
case AML_FIELD_CONNECTION_OP:
|
|
|
|
Opcode = AML_INT_CONNECTION_OP;
|
|
ParserState->Aml++;
|
|
break;
|
|
|
|
case AML_FIELD_EXT_ACCESS_OP:
|
|
|
|
Opcode = AML_INT_EXTACCESSFIELD_OP;
|
|
ParserState->Aml++;
|
|
break;
|
|
|
|
default:
|
|
|
|
Opcode = AML_INT_NAMEDFIELD_OP;
|
|
break;
|
|
}
|
|
|
|
/* Allocate a new field op */
|
|
|
|
Field = AcpiPsAllocOp (Opcode);
|
|
if (!Field)
|
|
{
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
Field->Common.AmlOffset = AmlOffset;
|
|
|
|
/* Decode the field type */
|
|
|
|
switch (Opcode)
|
|
{
|
|
case AML_INT_NAMEDFIELD_OP:
|
|
|
|
/* Get the 4-character name */
|
|
|
|
ACPI_MOVE_32_TO_32 (&Name, ParserState->Aml);
|
|
AcpiPsSetName (Field, Name);
|
|
ParserState->Aml += ACPI_NAME_SIZE;
|
|
|
|
/* Get the length which is encoded as a package length */
|
|
|
|
Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
|
|
break;
|
|
|
|
|
|
case AML_INT_RESERVEDFIELD_OP:
|
|
|
|
/* Get the length which is encoded as a package length */
|
|
|
|
Field->Common.Value.Size = AcpiPsGetNextPackageLength (ParserState);
|
|
break;
|
|
|
|
|
|
case AML_INT_ACCESSFIELD_OP:
|
|
case AML_INT_EXTACCESSFIELD_OP:
|
|
|
|
/*
|
|
* Get AccessType and AccessAttrib and merge into the field Op
|
|
* AccessType is first operand, AccessAttribute is second. stuff
|
|
* these bytes into the node integer value for convenience.
|
|
*/
|
|
|
|
/* Get the two bytes (Type/Attribute) */
|
|
|
|
AccessType = ACPI_GET8 (ParserState->Aml);
|
|
ParserState->Aml++;
|
|
AccessAttribute = ACPI_GET8 (ParserState->Aml);
|
|
ParserState->Aml++;
|
|
|
|
Field->Common.Value.Integer = (UINT8) AccessType;
|
|
Field->Common.Value.Integer |= (UINT16) (AccessAttribute << 8);
|
|
|
|
/* This opcode has a third byte, AccessLength */
|
|
|
|
if (Opcode == AML_INT_EXTACCESSFIELD_OP)
|
|
{
|
|
AccessLength = ACPI_GET8 (ParserState->Aml);
|
|
ParserState->Aml++;
|
|
|
|
Field->Common.Value.Integer |= (UINT32) (AccessLength << 16);
|
|
}
|
|
break;
|
|
|
|
|
|
case AML_INT_CONNECTION_OP:
|
|
|
|
/*
|
|
* Argument for Connection operator can be either a Buffer
|
|
* (resource descriptor), or a NameString.
|
|
*/
|
|
if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP)
|
|
{
|
|
ParserState->Aml++;
|
|
|
|
PkgEnd = ParserState->Aml;
|
|
PkgLength = AcpiPsGetNextPackageLength (ParserState);
|
|
PkgEnd += PkgLength;
|
|
|
|
if (ParserState->Aml < PkgEnd)
|
|
{
|
|
/* Non-empty list */
|
|
|
|
Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP);
|
|
if (!Arg)
|
|
{
|
|
AcpiPsFreeOp (Field);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Get the actual buffer length argument */
|
|
|
|
Opcode = ACPI_GET8 (ParserState->Aml);
|
|
ParserState->Aml++;
|
|
|
|
switch (Opcode)
|
|
{
|
|
case AML_BYTE_OP: /* AML_BYTEDATA_ARG */
|
|
|
|
BufferLength = ACPI_GET8 (ParserState->Aml);
|
|
ParserState->Aml += 1;
|
|
break;
|
|
|
|
case AML_WORD_OP: /* AML_WORDDATA_ARG */
|
|
|
|
BufferLength = ACPI_GET16 (ParserState->Aml);
|
|
ParserState->Aml += 2;
|
|
break;
|
|
|
|
case AML_DWORD_OP: /* AML_DWORDATA_ARG */
|
|
|
|
BufferLength = ACPI_GET32 (ParserState->Aml);
|
|
ParserState->Aml += 4;
|
|
break;
|
|
|
|
default:
|
|
|
|
BufferLength = 0;
|
|
break;
|
|
}
|
|
|
|
/* Fill in bytelist data */
|
|
|
|
Arg->Named.Value.Size = BufferLength;
|
|
Arg->Named.Data = ParserState->Aml;
|
|
}
|
|
|
|
/* Skip to End of byte data */
|
|
|
|
ParserState->Aml = PkgEnd;
|
|
}
|
|
else
|
|
{
|
|
Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
|
|
if (!Arg)
|
|
{
|
|
AcpiPsFreeOp (Field);
|
|
return_PTR (NULL);
|
|
}
|
|
|
|
/* Get the Namestring argument */
|
|
|
|
Arg->Common.Value.Name = AcpiPsGetNextNamestring (ParserState);
|
|
}
|
|
|
|
/* Link the buffer/namestring to parent (CONNECTION_OP) */
|
|
|
|
AcpiPsAppendArg (Field, Arg);
|
|
break;
|
|
|
|
|
|
default:
|
|
|
|
/* Opcode was set in previous switch */
|
|
break;
|
|
}
|
|
|
|
return_PTR (Field);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiPsGetNextArg
|
|
*
|
|
* PARAMETERS: WalkState - Current state
|
|
* ParserState - Current parser state object
|
|
* ArgType - The argument type (AML_*_ARG)
|
|
* ReturnArg - Where the next arg is returned
|
|
*
|
|
* RETURN: Status, and an op object containing the next argument.
|
|
*
|
|
* DESCRIPTION: Get next argument (including complex list arguments that require
|
|
* pushing the parser stack)
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiPsGetNextArg (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_PARSE_STATE *ParserState,
|
|
UINT32 ArgType,
|
|
ACPI_PARSE_OBJECT **ReturnArg)
|
|
{
|
|
ACPI_PARSE_OBJECT *Arg = NULL;
|
|
ACPI_PARSE_OBJECT *Prev = NULL;
|
|
ACPI_PARSE_OBJECT *Field;
|
|
UINT32 Subop;
|
|
ACPI_STATUS Status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (PsGetNextArg, ParserState);
|
|
|
|
|
|
switch (ArgType)
|
|
{
|
|
case ARGP_BYTEDATA:
|
|
case ARGP_WORDDATA:
|
|
case ARGP_DWORDDATA:
|
|
case ARGP_CHARLIST:
|
|
case ARGP_NAME:
|
|
case ARGP_NAMESTRING:
|
|
|
|
/* Constants, strings, and namestrings are all the same size */
|
|
|
|
Arg = AcpiPsAllocOp (AML_BYTE_OP);
|
|
if (!Arg)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
AcpiPsGetNextSimpleArg (ParserState, ArgType, Arg);
|
|
break;
|
|
|
|
case ARGP_PKGLENGTH:
|
|
|
|
/* Package length, nothing returned */
|
|
|
|
ParserState->PkgEnd = AcpiPsGetNextPackageEnd (ParserState);
|
|
break;
|
|
|
|
case ARGP_FIELDLIST:
|
|
|
|
if (ParserState->Aml < ParserState->PkgEnd)
|
|
{
|
|
/* Non-empty list */
|
|
|
|
while (ParserState->Aml < ParserState->PkgEnd)
|
|
{
|
|
Field = AcpiPsGetNextField (ParserState);
|
|
if (!Field)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
if (Prev)
|
|
{
|
|
Prev->Common.Next = Field;
|
|
}
|
|
else
|
|
{
|
|
Arg = Field;
|
|
}
|
|
Prev = Field;
|
|
}
|
|
|
|
/* Skip to End of byte data */
|
|
|
|
ParserState->Aml = ParserState->PkgEnd;
|
|
}
|
|
break;
|
|
|
|
case ARGP_BYTELIST:
|
|
|
|
if (ParserState->Aml < ParserState->PkgEnd)
|
|
{
|
|
/* Non-empty list */
|
|
|
|
Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP);
|
|
if (!Arg)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Fill in bytelist data */
|
|
|
|
Arg->Common.Value.Size = (UINT32)
|
|
ACPI_PTR_DIFF (ParserState->PkgEnd, ParserState->Aml);
|
|
Arg->Named.Data = ParserState->Aml;
|
|
|
|
/* Skip to End of byte data */
|
|
|
|
ParserState->Aml = ParserState->PkgEnd;
|
|
}
|
|
break;
|
|
|
|
case ARGP_TARGET:
|
|
case ARGP_SUPERNAME:
|
|
case ARGP_SIMPLENAME:
|
|
|
|
Subop = AcpiPsPeekOpcode (ParserState);
|
|
if (Subop == 0 ||
|
|
AcpiPsIsLeadingChar (Subop) ||
|
|
ACPI_IS_ROOT_PREFIX (Subop) ||
|
|
ACPI_IS_PARENT_PREFIX (Subop))
|
|
{
|
|
/* NullName or NameString */
|
|
|
|
Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP);
|
|
if (!Arg)
|
|
{
|
|
return_ACPI_STATUS (AE_NO_MEMORY);
|
|
}
|
|
|
|
/* To support SuperName arg of Unload */
|
|
|
|
if (WalkState->Opcode == AML_UNLOAD_OP)
|
|
{
|
|
Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 1);
|
|
|
|
/*
|
|
* If the SuperName arg of Unload is a method call,
|
|
* we have restored the AML pointer, just free this Arg
|
|
*/
|
|
if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP)
|
|
{
|
|
AcpiPsFreeOp (Arg);
|
|
Arg = NULL;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Status = AcpiPsGetNextNamepath (WalkState, ParserState, Arg, 0);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Single complex argument, nothing returned */
|
|
|
|
WalkState->ArgCount = 1;
|
|
}
|
|
break;
|
|
|
|
case ARGP_DATAOBJ:
|
|
case ARGP_TERMARG:
|
|
|
|
/* Single complex argument, nothing returned */
|
|
|
|
WalkState->ArgCount = 1;
|
|
break;
|
|
|
|
case ARGP_DATAOBJLIST:
|
|
case ARGP_TERMLIST:
|
|
case ARGP_OBJLIST:
|
|
|
|
if (ParserState->Aml < ParserState->PkgEnd)
|
|
{
|
|
/* Non-empty list of variable arguments, nothing returned */
|
|
|
|
WalkState->ArgCount = ACPI_VAR_ARGS;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR ((AE_INFO, "Invalid ArgType: 0x%X", ArgType));
|
|
Status = AE_AML_OPERAND_TYPE;
|
|
break;
|
|
}
|
|
|
|
*ReturnArg = Arg;
|
|
return_ACPI_STATUS (Status);
|
|
}
|