psargs.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acparser.h"
#include "amlcode.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "acconvert.h"

Include dependency graph for psargs.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_PARSER

Functions
static UINT32	AcpiPsGetNextPackageLength (ACPI_PARSE_STATE *ParserState)
static ACPI_PARSE_OBJECT *	AcpiPsGetNextField (ACPI_PARSE_STATE *ParserState)
UINT8 *	AcpiPsGetNextPackageEnd (ACPI_PARSE_STATE *ParserState)
char *	AcpiPsGetNextNamestring (ACPI_PARSE_STATE *ParserState)
ACPI_STATUS	AcpiPsGetNextNamepath (ACPI_WALK_STATE *WalkState, ACPI_PARSE_STATE *ParserState, ACPI_PARSE_OBJECT *Arg, BOOLEAN PossibleMethodCall)
void	AcpiPsGetNextSimpleArg (ACPI_PARSE_STATE *ParserState, UINT32 ArgType, ACPI_PARSE_OBJECT *Arg)
ACPI_STATUS	AcpiPsGetNextArg (ACPI_WALK_STATE *WalkState, ACPI_PARSE_STATE *ParserState, UINT32 ArgType, ACPI_PARSE_OBJECT **ReturnArg)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_PARSER

Definition at line 52 of file psargs.c.

Function Documentation

AcpiPsGetNextArg()

ACPI_STATUS AcpiPsGetNextArg	(	ACPI_WALK_STATE *	WalkState,
		ACPI_PARSE_STATE *	ParserState,
		UINT32	ArgType,
		ACPI_PARSE_OBJECT **	ReturnArg
	)

Definition at line 785 of file psargs.c.

{
    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);
 
 
    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "Expected argument type ARGP: %s (%2.2X)\n",
        AcpiUtGetArgumentTypeName (ArgType), ArgType));
 
    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, ParserState->Aml);
        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,
                ParserState->Aml);
            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_SIMPLENAME:
    case ARGP_NAME_OR_REF:
 
        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
            "**** SimpleName/NameOrRef: %s (%2.2X)\n",
            AcpiUtGetArgumentTypeName (ArgType), ArgType));
 
        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, ParserState->Aml);
            if (!Arg)
            {
                return_ACPI_STATUS (AE_NO_MEMORY);
            }
 
            Status = AcpiPsGetNextNamepath (WalkState, ParserState,
                Arg, ACPI_NOT_METHOD_CALL);
        }
        else
        {
            /* Single complex argument, nothing returned */
 
            WalkState->ArgCount = 1;
        }
        break;
 
    case ARGP_TARGET:
    case ARGP_SUPERNAME:
 
        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
            "**** Target/Supername: %s (%2.2X)\n",
            AcpiUtGetArgumentTypeName (ArgType), ArgType));
 
        Subop = AcpiPsPeekOpcode (ParserState);
        if (Subop == 0                  ||
            AcpiPsIsLeadingChar (Subop) ||
            ACPI_IS_ROOT_PREFIX (Subop) ||
            ACPI_IS_PARENT_PREFIX (Subop))
        {
            /* NULL target (zero). Convert to a NULL namepath */
 
            Arg = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, ParserState->Aml);
            if (!Arg)
            {
                return_ACPI_STATUS (AE_NO_MEMORY);
            }
 
            Status = AcpiPsGetNextNamepath (WalkState, ParserState,
                Arg, ACPI_POSSIBLE_METHOD_CALL);
 
            if (Arg->Common.AmlOpcode == AML_INT_METHODCALL_OP)
            {
                /* Free method call op and corresponding namestring sub-ob */
 
                AcpiPsFreeOp (Arg->Common.Value.Arg);
                AcpiPsFreeOp (Arg);
                Arg = NULL;
                WalkState->ArgCount = 1;
            }
        }
        else
        {
            /* Single complex argument, nothing returned */
 
            WalkState->ArgCount = 1;
        }
        break;
 
    case ARGP_DATAOBJ:
    case ARGP_TERMARG:
 
        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
            "**** TermArg/DataObj: %s (%2.2X)\n",
            AcpiUtGetArgumentTypeName (ArgType), ArgType));
 
        /* 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);
}

Referenced by AcpiPsBuildNamedOp(), and AcpiPsGetArguments().

AcpiPsGetNextField()

static ACPI_PARSE_OBJECT * AcpiPsGetNextField ( ACPI_PARSE_STATE *  ParserState )

static

Definition at line 528 of file psargs.c.

{
    UINT8                   *Aml;
    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);
 
 
    ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
    Aml = ParserState->Aml;
 
    /* 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, Aml);
    if (!Field)
    {
        return_PTR (NULL);
    }
 
    /* Decode the field type */
 
    ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
    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_NAMESEG_SIZE;
 
 
        ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
 
#ifdef ACPI_ASL_COMPILER
        /*
         * Because the package length isn't represented as a parse tree object,
         * take comments surrounding this and add to the previously created
         * parse node.
         */
        if (Field->Common.InlineComment)
        {
            Field->Common.NameComment = Field->Common.InlineComment;
        }
        Field->Common.InlineComment  = AcpiGbl_CurrentInlineComment;
        AcpiGbl_CurrentInlineComment = NULL;
#endif
 
        /* 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.
         */
        Aml = ParserState->Aml;
        if (ACPI_GET8 (ParserState->Aml) == AML_BUFFER_OP)
        {
            ParserState->Aml++;
 
            ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
            PkgEnd = ParserState->Aml;
            PkgLength = AcpiPsGetNextPackageLength (ParserState);
            PkgEnd += PkgLength;
 
            ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
            if (ParserState->Aml < PkgEnd)
            {
                /* Non-empty list */
 
                Arg = AcpiPsAllocOp (AML_INT_BYTELIST_OP, Aml);
                if (!Arg)
                {
                    AcpiPsFreeOp (Field);
                    return_PTR (NULL);
                }
 
                /* Get the actual buffer length argument */
 
                Opcode = ACPI_GET8 (ParserState->Aml);
                ParserState->Aml++;
 
                ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
                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 */
 
                ASL_CV_CAPTURE_COMMENTS_ONLY (ParserState);
                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, Aml);
            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);
}

Referenced by AcpiPsGetNextArg().

AcpiPsGetNextNamepath()

ACPI_STATUS AcpiPsGetNextNamepath	(	ACPI_WALK_STATE *	WalkState,
		ACPI_PARSE_STATE *	ParserState,
		ACPI_PARSE_OBJECT *	Arg,
		BOOLEAN	PossibleMethodCall
	)

Definition at line 254 of file psargs.c.

{
    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 ((GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) == ARGP_SUPERNAME) ||
            (GET_CURRENT_ARG_TYPE (WalkState->ArgTypes) == ARGP_TARGET))
        {
            /*
             * AcpiPsGetNextNamestring has increased the AML pointer past
             * the method invocation namestring, so we need to restore the
             * saved AML pointer back to the original method invocation
             * namestring.
             */
            WalkState->ParserState.Aml = Start;
            WalkState->ArgCount = 1;
            AcpiPsInitOp (Arg, AML_INT_METHODCALL_OP);
        }
 
        /* This name is actually a control method invocation */
 
        MethodDesc = AcpiNsGetAttachedObject (Node);
        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
            "Control Method invocation %4.4s - %p Desc %p Path=%p\n",
            Node->Name.Ascii, Node, MethodDesc, Path));
 
        NameOp = AcpiPsAllocOp (AML_INT_NAMEPATH_OP, Start);
        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_CONDITIONAL_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_VARIABLE_PACKAGE_OP)))
        {
            Status = AE_OK;
        }
    }
 
    /* Final exception check (may have been changed from code above) */
 
    if (ACPI_FAILURE (Status))
    {
        ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo, 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);
}

Referenced by AcpiPsGetArguments(), and AcpiPsGetNextArg().

AcpiPsGetNextNamestring()

char * AcpiPsGetNextNamestring

(

ACPI_PARSE_STATE *

ParserState

)

Definition at line 172 of file psargs.c.

{
    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_NAMESEG_SIZE);
        break;
 
    case AML_MULTI_NAME_PREFIX:
 
        /* Multiple name segments, 4 chars each, count in next byte */
 
        End += 2 + (*(End + 1) * ACPI_NAMESEG_SIZE);
        break;
 
    default:
 
        /* Single name segment */
 
        End += ACPI_NAMESEG_SIZE;
        break;
    }
 
    ParserState->Aml = End;
    return_PTR ((char *) Start);
}

Referenced by AcpiDsLoad1BeginOp(), AcpiDsLoad2BeginOp(), AcpiInstallMethod(), AcpiPsGetNextField(), AcpiPsGetNextNamepath(), and AcpiPsGetNextSimpleArg().

AcpiPsGetNextPackageEnd()

UINT8 * AcpiPsGetNextPackageEnd

(

ACPI_PARSE_STATE *

ParserState

)

Definition at line 138 of file psargs.c.

{
    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 */
}

Referenced by AcpiInstallMethod(), AcpiPsGetNextArg(), AcpiPsNextParseState(), and AcpiPsParseLoop().

AcpiPsGetNextPackageLength()

static UINT32 AcpiPsGetNextPackageLength ( ACPI_PARSE_STATE *  ParserState )

static

Definition at line 81 of file psargs.c.

{
    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);
}

Referenced by AcpiPsGetNextField(), and AcpiPsGetNextPackageEnd().

AcpiPsGetNextSimpleArg()

void AcpiPsGetNextSimpleArg	(	ACPI_PARSE_STATE *	ParserState,
		UINT32	ArgType,
		ACPI_PARSE_OBJECT *	Arg
	)

Definition at line 428 of file psargs.c.

{
    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;
}

Referenced by AcpiPsGetArguments(), and AcpiPsGetNextArg().