nsconvert.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acinterp.h"
#include "acpredef.h"
#include "amlresrc.h"

Include dependency graph for nsconvert.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_NAMESPACE

Functions
ACPI_STATUS	AcpiNsConvertToInteger (ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)
ACPI_STATUS	AcpiNsConvertToString (ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)
ACPI_STATUS	AcpiNsConvertToBuffer (ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)
ACPI_STATUS	AcpiNsConvertToUnicode (ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)
ACPI_STATUS	AcpiNsConvertToResource (ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)
ACPI_STATUS	AcpiNsConvertToReference (ACPI_NAMESPACE_NODE *Scope, ACPI_OPERAND_OBJECT *OriginalObject, ACPI_OPERAND_OBJECT **ReturnObject)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_NAMESPACE

Definition at line 52 of file nsconvert.c.

Function Documentation

AcpiNsConvertToBuffer()

ACPI_STATUS AcpiNsConvertToBuffer	(	ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 233 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject;
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     **Elements;
    UINT32                  *DwordBuffer;
    UINT32                  Count;
    UINT32                  i;
 
 
    switch (OriginalObject->Common.Type)
    {
    case ACPI_TYPE_INTEGER:
        /*
         * Integer-to-Buffer conversion.
         * Convert the Integer to a packed-byte buffer. _MAT and other
         * objects need this sometimes, if a read has been performed on a
         * Field object that is less than or equal to the global integer
         * size (32 or 64 bits).
         */
        Status = AcpiExConvertToBuffer (OriginalObject, &NewObject);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        break;
 
    case ACPI_TYPE_STRING:
 
        /* String-to-Buffer conversion. Simple data copy */
 
        NewObject = AcpiUtCreateBufferObject
            (OriginalObject->String.Length);
        if (!NewObject)
        {
            return (AE_NO_MEMORY);
        }
 
        memcpy (NewObject->Buffer.Pointer,
            OriginalObject->String.Pointer, OriginalObject->String.Length);
        break;
 
    case ACPI_TYPE_PACKAGE:
        /*
         * This case is often seen for predefined names that must return a
         * Buffer object with multiple DWORD integers within. For example,
         * _FDE and _GTM. The Package can be converted to a Buffer.
         */
 
        /* All elements of the Package must be integers */
 
        Elements = OriginalObject->Package.Elements;
        Count = OriginalObject->Package.Count;
 
        for (i = 0; i < Count; i++)
        {
            if ((!*Elements) ||
                ((*Elements)->Common.Type != ACPI_TYPE_INTEGER))
            {
                return (AE_AML_OPERAND_TYPE);
            }
            Elements++;
        }
 
        /* Create the new buffer object to replace the Package */
 
        NewObject = AcpiUtCreateBufferObject (ACPI_MUL_4 (Count));
        if (!NewObject)
        {
            return (AE_NO_MEMORY);
        }
 
        /* Copy the package elements (integers) to the buffer as DWORDs */
 
        Elements = OriginalObject->Package.Elements;
        DwordBuffer = ACPI_CAST_PTR (UINT32, NewObject->Buffer.Pointer);
 
        for (i = 0; i < Count; i++)
        {
            *DwordBuffer = (UINT32) (*Elements)->Integer.Value;
            DwordBuffer++;
            Elements++;
        }
        break;
 
    default:
 
        return (AE_AML_OPERAND_TYPE);
    }
 
    *ReturnObject = NewObject;
    return (AE_OK);
}

Referenced by AcpiNsSimpleRepair().

AcpiNsConvertToInteger()

ACPI_STATUS AcpiNsConvertToInteger	(	ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 70 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject;
    ACPI_STATUS             Status;
    UINT64                  Value = 0;
    UINT32                  i;
 
 
    switch (OriginalObject->Common.Type)
    {
    case ACPI_TYPE_STRING:
 
        /* String-to-Integer conversion */
 
        Status = AcpiUtStrtoul64 (OriginalObject->String.Pointer, &Value);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        break;
 
    case ACPI_TYPE_BUFFER:
 
        /* Buffer-to-Integer conversion. Max buffer size is 64 bits. */
 
        if (OriginalObject->Buffer.Length > 8)
        {
            return (AE_AML_OPERAND_TYPE);
        }
 
        /* Extract each buffer byte to create the integer */
 
        for (i = 0; i < OriginalObject->Buffer.Length; i++)
        {
            Value |= ((UINT64)
                OriginalObject->Buffer.Pointer[i] << (i * 8));
        }
        break;
 
    default:
 
        return (AE_AML_OPERAND_TYPE);
    }
 
    NewObject = AcpiUtCreateIntegerObject (Value);
    if (!NewObject)
    {
        return (AE_NO_MEMORY);
    }
 
    *ReturnObject = NewObject;
    return (AE_OK);
}

Referenced by AcpiNsSimpleRepair().

AcpiNsConvertToReference()

ACPI_STATUS AcpiNsConvertToReference	(	ACPI_NAMESPACE_NODE *	Scope,
		ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 506 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject = NULL;
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_GENERIC_STATE      ScopeInfo;
    char                    *Name;
 
 
    ACPI_FUNCTION_NAME (NsConvertToReference);
 
 
    /* Convert path into internal presentation */
 
    Status = AcpiNsInternalizeName (OriginalObject->String.Pointer, &Name);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    /* Find the namespace node */
 
    ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Scope);
    Status = AcpiNsLookup (&ScopeInfo, Name,
        ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE,
        ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, &Node);
    if (ACPI_FAILURE (Status))
    {
        /* Check if we are resolving a named reference within a package */
 
        ACPI_ERROR_NAMESPACE (&ScopeInfo,
            OriginalObject->String.Pointer, Status);
        goto ErrorExit;
    }
 
    /* Create and init a new internal ACPI object */
 
    NewObject = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);
    if (!NewObject)
    {
        Status = AE_NO_MEMORY;
        goto ErrorExit;
    }
    NewObject->Reference.Node = Node;
    NewObject->Reference.Object = Node->Object;
    NewObject->Reference.Class = ACPI_REFCLASS_NAME;
 
    /*
     * Increase reference of the object if needed (the object is likely a
     * null for device nodes).
     */
    AcpiUtAddReference (Node->Object);
 
ErrorExit:
    ACPI_FREE (Name);
    *ReturnObject = NewObject;
    return (Status);
}

AcpiNsConvertToResource()

ACPI_STATUS AcpiNsConvertToResource	(	ACPI_NAMESPACE_NODE *	Scope,
		ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 420 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject;
    UINT8                   *Buffer;
 
 
    /*
     * We can fix the following cases for an expected resource template:
     * 1. No return value (interpreter slack mode is disabled)
     * 2. A "Return (Zero)" statement
     * 3. A "Return empty buffer" statement
     *
     * We will return a buffer containing a single EndTag
     * resource descriptor.
     */
    if (OriginalObject)
    {
        switch (OriginalObject->Common.Type)
        {
        case ACPI_TYPE_INTEGER:
 
            /* We can only repair an Integer==0 */
 
            if (OriginalObject->Integer.Value)
            {
                return (AE_AML_OPERAND_TYPE);
            }
            break;
 
        case ACPI_TYPE_BUFFER:
 
            if (OriginalObject->Buffer.Length)
            {
                /* Additional checks can be added in the future */
 
                *ReturnObject = NULL;
                return (AE_OK);
            }
            break;
 
        case ACPI_TYPE_STRING:
        default:
 
            return (AE_AML_OPERAND_TYPE);
        }
    }
 
    /* Create the new buffer object for the resource descriptor */
 
    NewObject = AcpiUtCreateBufferObject (2);
    if (!NewObject)
    {
        return (AE_NO_MEMORY);
    }
 
    Buffer = ACPI_CAST_PTR (UINT8, NewObject->Buffer.Pointer);
 
    /* Initialize the Buffer with a single EndTag descriptor */
 
    Buffer[0] = (ACPI_RESOURCE_NAME_END_TAG | ASL_RDESC_END_TAG_SIZE);
    Buffer[1] = 0x00;
 
    *ReturnObject = NewObject;
    return (AE_OK);
}

AcpiNsConvertToString()

ACPI_STATUS AcpiNsConvertToString	(	ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 141 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject;
    ACPI_SIZE               Length;
    ACPI_STATUS             Status;
 
 
    switch (OriginalObject->Common.Type)
    {
    case ACPI_TYPE_INTEGER:
        /*
         * Integer-to-String conversion. Commonly, convert
         * an integer of value 0 to a NULL string. The last element of
         * _BIF and _BIX packages occasionally need this fix.
         */
        if (OriginalObject->Integer.Value == 0)
        {
            /* Allocate a new NULL string object */
 
            NewObject = AcpiUtCreateStringObject (0);
            if (!NewObject)
            {
                return (AE_NO_MEMORY);
            }
        }
        else
        {
            Status = AcpiExConvertToString (OriginalObject,
                &NewObject, ACPI_IMPLICIT_CONVERT_HEX);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }
        }
        break;
 
    case ACPI_TYPE_BUFFER:
        /*
         * Buffer-to-String conversion. Use a ToString
         * conversion, no transform performed on the buffer data. The best
         * example of this is the _BIF method, where the string data from
         * the battery is often (incorrectly) returned as buffer object(s).
         */
        Length = 0;
        while ((Length < OriginalObject->Buffer.Length) &&
                (OriginalObject->Buffer.Pointer[Length]))
        {
            Length++;
        }
 
        /* Allocate a new string object */
 
        NewObject = AcpiUtCreateStringObject (Length);
        if (!NewObject)
        {
            return (AE_NO_MEMORY);
        }
 
        /*
         * Copy the raw buffer data with no transform. String is already NULL
         * terminated at Length+1.
         */
        memcpy (NewObject->String.Pointer,
            OriginalObject->Buffer.Pointer, Length);
        break;
 
    default:
 
        return (AE_AML_OPERAND_TYPE);
    }
 
    *ReturnObject = NewObject;
    return (AE_OK);
}

Referenced by AcpiNsSimpleRepair().

AcpiNsConvertToUnicode()

ACPI_STATUS AcpiNsConvertToUnicode	(	ACPI_NAMESPACE_NODE *	Scope,
		ACPI_OPERAND_OBJECT *	OriginalObject,
		ACPI_OPERAND_OBJECT **	ReturnObject
	)

Definition at line 345 of file nsconvert.c.

{
    ACPI_OPERAND_OBJECT     *NewObject;
    char                    *AsciiString;
    UINT16                  *UnicodeBuffer;
    UINT32                  UnicodeLength;
    UINT32                  i;
 
 
    if (!OriginalObject)
    {
        return (AE_OK);
    }
 
    /* If a Buffer was returned, it must be at least two bytes long */
 
    if (OriginalObject->Common.Type == ACPI_TYPE_BUFFER)
    {
        if (OriginalObject->Buffer.Length < 2)
        {
            return (AE_AML_OPERAND_VALUE);
        }
 
        *ReturnObject = NULL;
        return (AE_OK);
    }
 
    /*
     * The original object is an ASCII string. Convert this string to
     * a unicode buffer.
     */
    AsciiString = OriginalObject->String.Pointer;
    UnicodeLength = (OriginalObject->String.Length * 2) + 2;
 
    /* Create a new buffer object for the Unicode data */
 
    NewObject = AcpiUtCreateBufferObject (UnicodeLength);
    if (!NewObject)
    {
        return (AE_NO_MEMORY);
    }
 
    UnicodeBuffer = ACPI_CAST_PTR (UINT16, NewObject->Buffer.Pointer);
 
    /* Convert ASCII to Unicode */
 
    for (i = 0; i < OriginalObject->String.Length; i++)
    {
        UnicodeBuffer[i] = (UINT16) AsciiString[i];
    }
 
    *ReturnObject = NewObject;
    return (AE_OK);
}