freebsd-dev/sys/contrib/dev/acpica/utmisc.c
2005-11-01 22:11:18 +00:00

1237 lines
34 KiB
C

/*******************************************************************************
*
* Module Name: utmisc - common utility procedures
* $Revision: 1.125 $
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2005, 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.
*
*****************************************************************************/
#define __UTMISC_C__
#include <contrib/dev/acpica/acpi.h>
#include <contrib/dev/acpica/acnamesp.h>
#include <contrib/dev/acpica/amlresrc.h>
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utmisc")
/*******************************************************************************
*
* FUNCTION: AcpiUtAllocateOwnerId
*
* PARAMETERS: OwnerId - Where the new owner ID is returned
*
* RETURN: Status
*
* DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
* track objects created by the table or method, to be deleted
* when the method exits or the table is unloaded.
*
******************************************************************************/
ACPI_STATUS
AcpiUtAllocateOwnerId (
ACPI_OWNER_ID *OwnerId)
{
ACPI_NATIVE_UINT i;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE ("UtAllocateOwnerId");
/* Guard against multiple allocations of ID to the same location */
if (*OwnerId)
{
ACPI_REPORT_ERROR (("Owner ID [%2.2X] already exists\n", *OwnerId));
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
/* Mutex for the global ID mask */
Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Find a free owner ID */
for (i = 0; i < 32; i++)
{
if (!(AcpiGbl_OwnerIdMask & (1 << i)))
{
ACPI_DEBUG_PRINT ((ACPI_DB_VALUES,
"Current OwnerId mask: %8.8X New ID: %2.2X\n",
AcpiGbl_OwnerIdMask, (unsigned int) (i + 1)));
AcpiGbl_OwnerIdMask |= (1 << i);
*OwnerId = (ACPI_OWNER_ID) (i + 1);
goto Exit;
}
}
/*
* If we are here, all OwnerIds have been allocated. This probably should
* not happen since the IDs are reused after deallocation. The IDs are
* allocated upon table load (one per table) and method execution, and
* they are released when a table is unloaded or a method completes
* execution.
*/
*OwnerId = 0;
Status = AE_OWNER_ID_LIMIT;
ACPI_REPORT_ERROR ((
"Could not allocate new OwnerId (32 max), AE_OWNER_ID_LIMIT\n"));
Exit:
(void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtReleaseOwnerId
*
* PARAMETERS: OwnerIdPtr - Pointer to a previously allocated OwnerID
*
* RETURN: None. No error is returned because we are either exiting a
* control method or unloading a table. Either way, we would
* ignore any error anyway.
*
* DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 32
*
******************************************************************************/
void
AcpiUtReleaseOwnerId (
ACPI_OWNER_ID *OwnerIdPtr)
{
ACPI_OWNER_ID OwnerId = *OwnerIdPtr;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE_U32 ("UtReleaseOwnerId", OwnerId);
/* Always clear the input OwnerId (zero is an invalid ID) */
*OwnerIdPtr = 0;
/* Zero is not a valid OwnerID */
if ((OwnerId == 0) || (OwnerId > 32))
{
ACPI_REPORT_ERROR (("Invalid OwnerId: %2.2X\n", OwnerId));
return_VOID;
}
/* Mutex for the global ID mask */
Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES);
if (ACPI_FAILURE (Status))
{
return_VOID;
}
/* Normalize the ID to zero */
OwnerId--;
/* Free the owner ID only if it is valid */
if (AcpiGbl_OwnerIdMask & (1 << OwnerId))
{
AcpiGbl_OwnerIdMask ^= (1 << OwnerId);
}
(void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtStrupr (strupr)
*
* PARAMETERS: SrcString - The source string to convert
*
* RETURN: None
*
* DESCRIPTION: Convert string to uppercase
*
* NOTE: This is not a POSIX function, so it appears here, not in utclib.c
*
******************************************************************************/
void
AcpiUtStrupr (
char *SrcString)
{
char *String;
ACPI_FUNCTION_ENTRY ();
if (!SrcString)
{
return;
}
/* Walk entire string, uppercasing the letters */
for (String = SrcString; *String; String++)
{
*String = (char) ACPI_TOUPPER (*String);
}
return;
}
/*******************************************************************************
*
* FUNCTION: AcpiUtPrintString
*
* PARAMETERS: String - Null terminated ASCII string
* MaxLength - Maximum output length
*
* RETURN: None
*
* DESCRIPTION: Dump an ASCII string with support for ACPI-defined escape
* sequences.
*
******************************************************************************/
void
AcpiUtPrintString (
char *String,
UINT8 MaxLength)
{
UINT32 i;
if (!String)
{
AcpiOsPrintf ("<\"NULL STRING PTR\">");
return;
}
AcpiOsPrintf ("\"");
for (i = 0; String[i] && (i < MaxLength); i++)
{
/* Escape sequences */
switch (String[i])
{
case 0x07:
AcpiOsPrintf ("\\a"); /* BELL */
break;
case 0x08:
AcpiOsPrintf ("\\b"); /* BACKSPACE */
break;
case 0x0C:
AcpiOsPrintf ("\\f"); /* FORMFEED */
break;
case 0x0A:
AcpiOsPrintf ("\\n"); /* LINEFEED */
break;
case 0x0D:
AcpiOsPrintf ("\\r"); /* CARRIAGE RETURN*/
break;
case 0x09:
AcpiOsPrintf ("\\t"); /* HORIZONTAL TAB */
break;
case 0x0B:
AcpiOsPrintf ("\\v"); /* VERTICAL TAB */
break;
case '\'': /* Single Quote */
case '\"': /* Double Quote */
case '\\': /* Backslash */
AcpiOsPrintf ("\\%c", (int) String[i]);
break;
default:
/* Check for printable character or hex escape */
if (ACPI_IS_PRINT (String[i]))
{
/* This is a normal character */
AcpiOsPrintf ("%c", (int) String[i]);
}
else
{
/* All others will be Hex escapes */
AcpiOsPrintf ("\\x%2.2X", (INT32) String[i]);
}
break;
}
}
AcpiOsPrintf ("\"");
if (i == MaxLength && String[i])
{
AcpiOsPrintf ("...");
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtDwordByteSwap
*
* PARAMETERS: Value - Value to be converted
*
* RETURN: UINT32 integer with bytes swapped
*
* DESCRIPTION: Convert a 32-bit value to big-endian (swap the bytes)
*
******************************************************************************/
UINT32
AcpiUtDwordByteSwap (
UINT32 Value)
{
union
{
UINT32 Value;
UINT8 Bytes[4];
} Out;
union
{
UINT32 Value;
UINT8 Bytes[4];
} In;
ACPI_FUNCTION_ENTRY ();
In.Value = Value;
Out.Bytes[0] = In.Bytes[3];
Out.Bytes[1] = In.Bytes[2];
Out.Bytes[2] = In.Bytes[1];
Out.Bytes[3] = In.Bytes[0];
return (Out.Value);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtSetIntegerWidth
*
* PARAMETERS: Revision From DSDT header
*
* RETURN: None
*
* DESCRIPTION: Set the global integer bit width based upon the revision
* of the DSDT. For Revision 1 and 0, Integers are 32 bits.
* For Revision 2 and above, Integers are 64 bits. Yes, this
* makes a difference.
*
******************************************************************************/
void
AcpiUtSetIntegerWidth (
UINT8 Revision)
{
if (Revision <= 1)
{
AcpiGbl_IntegerBitWidth = 32;
AcpiGbl_IntegerNybbleWidth = 8;
AcpiGbl_IntegerByteWidth = 4;
}
else
{
AcpiGbl_IntegerBitWidth = 64;
AcpiGbl_IntegerNybbleWidth = 16;
AcpiGbl_IntegerByteWidth = 8;
}
}
#ifdef ACPI_DEBUG_OUTPUT
/*******************************************************************************
*
* FUNCTION: AcpiUtDisplayInitPathname
*
* PARAMETERS: Type - Object type of the node
* ObjHandle - Handle whose pathname will be displayed
* Path - Additional path string to be appended.
* (NULL if no extra path)
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: Display full pathname of an object, DEBUG ONLY
*
******************************************************************************/
void
AcpiUtDisplayInitPathname (
UINT8 Type,
ACPI_NAMESPACE_NODE *ObjHandle,
char *Path)
{
ACPI_STATUS Status;
ACPI_BUFFER Buffer;
ACPI_FUNCTION_ENTRY ();
/* Only print the path if the appropriate debug level is enabled */
if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
{
return;
}
/* Get the full pathname to the node */
Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiNsHandleToPathname (ObjHandle, &Buffer);
if (ACPI_FAILURE (Status))
{
return;
}
/* Print what we're doing */
switch (Type)
{
case ACPI_TYPE_METHOD:
AcpiOsPrintf ("Executing ");
break;
default:
AcpiOsPrintf ("Initializing ");
break;
}
/* Print the object type and pathname */
AcpiOsPrintf ("%-12s %s",
AcpiUtGetTypeName (Type), (char *) Buffer.Pointer);
/* Extra path is used to append names like _STA, _INI, etc. */
if (Path)
{
AcpiOsPrintf (".%s", Path);
}
AcpiOsPrintf ("\n");
ACPI_MEM_FREE (Buffer.Pointer);
}
#endif
/*******************************************************************************
*
* FUNCTION: AcpiUtValidAcpiName
*
* PARAMETERS: Name - The name to be examined
*
* RETURN: TRUE if the name is valid, FALSE otherwise
*
* DESCRIPTION: Check for a valid ACPI name. Each character must be one of:
* 1) Upper case alpha
* 2) numeric
* 3) underscore
*
******************************************************************************/
BOOLEAN
AcpiUtValidAcpiName (
UINT32 Name)
{
char *NamePtr = (char *) &Name;
char Character;
ACPI_NATIVE_UINT i;
ACPI_FUNCTION_ENTRY ();
for (i = 0; i < ACPI_NAME_SIZE; i++)
{
Character = *NamePtr;
NamePtr++;
if (!((Character == '_') ||
(Character >= 'A' && Character <= 'Z') ||
(Character >= '0' && Character <= '9')))
{
return (FALSE);
}
}
return (TRUE);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtValidAcpiCharacter
*
* PARAMETERS: Character - The character to be examined
*
* RETURN: 1 if Character may appear in a name, else 0
*
* DESCRIPTION: Check for a printable character
*
******************************************************************************/
BOOLEAN
AcpiUtValidAcpiCharacter (
char Character)
{
ACPI_FUNCTION_ENTRY ();
return ((BOOLEAN) ((Character == '_') ||
(Character >= 'A' && Character <= 'Z') ||
(Character >= '0' && Character <= '9')));
}
/*******************************************************************************
*
* FUNCTION: AcpiUtStrtoul64
*
* PARAMETERS: String - Null terminated string
* Base - Radix of the string: 10, 16, or ACPI_ANY_BASE
* RetInteger - Where the converted integer is returned
*
* RETURN: Status and Converted value
*
* DESCRIPTION: Convert a string into an unsigned value.
* NOTE: Does not support Octal strings, not needed.
*
******************************************************************************/
ACPI_STATUS
AcpiUtStrtoul64 (
char *String,
UINT32 Base,
ACPI_INTEGER *RetInteger)
{
UINT32 ThisDigit = 0;
ACPI_INTEGER ReturnValue = 0;
ACPI_INTEGER Quotient;
ACPI_FUNCTION_TRACE ("UtStroul64");
if ((!String) || !(*String))
{
goto ErrorExit;
}
switch (Base)
{
case ACPI_ANY_BASE:
case 10:
case 16:
break;
default:
/* Invalid Base */
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Skip over any white space in the buffer */
while (ACPI_IS_SPACE (*String) || *String == '\t')
{
String++;
}
/*
* If the input parameter Base is zero, then we need to
* determine if it is decimal or hexadecimal:
*/
if (Base == 0)
{
if ((*String == '0') &&
(ACPI_TOLOWER (*(String + 1)) == 'x'))
{
Base = 16;
String += 2;
}
else
{
Base = 10;
}
}
/*
* For hexadecimal base, skip over the leading
* 0 or 0x, if they are present.
*/
if ((Base == 16) &&
(*String == '0') &&
(ACPI_TOLOWER (*(String + 1)) == 'x'))
{
String += 2;
}
/* Any string left? */
if (!(*String))
{
goto ErrorExit;
}
/* Main loop: convert the string to a 64-bit integer */
while (*String)
{
if (ACPI_IS_DIGIT (*String))
{
/* Convert ASCII 0-9 to Decimal value */
ThisDigit = ((UINT8) *String) - '0';
}
else
{
if (Base == 10)
{
/* Digit is out of range */
goto ErrorExit;
}
ThisDigit = (UINT8) ACPI_TOUPPER (*String);
if (ACPI_IS_XDIGIT ((char) ThisDigit))
{
/* Convert ASCII Hex char to value */
ThisDigit = ThisDigit - 'A' + 10;
}
else
{
/*
* We allow non-hex chars, just stop now, same as end-of-string.
* See ACPI spec, string-to-integer conversion.
*/
break;
}
}
/* Divide the digit into the correct position */
(void) AcpiUtShortDivide ((ACPI_INTEGER_MAX - (ACPI_INTEGER) ThisDigit),
Base, &Quotient, NULL);
if (ReturnValue > Quotient)
{
goto ErrorExit;
}
ReturnValue *= Base;
ReturnValue += ThisDigit;
String++;
}
/* All done, normal exit */
*RetInteger = ReturnValue;
return_ACPI_STATUS (AE_OK);
ErrorExit:
/* Base was set/validated above */
if (Base == 10)
{
return_ACPI_STATUS (AE_BAD_DECIMAL_CONSTANT);
}
else
{
return_ACPI_STATUS (AE_BAD_HEX_CONSTANT);
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtCreateUpdateStateAndPush
*
* PARAMETERS: Object - Object to be added to the new state
* Action - Increment/Decrement
* StateList - List the state will be added to
*
* RETURN: Status
*
* DESCRIPTION: Create a new state and push it
*
******************************************************************************/
ACPI_STATUS
AcpiUtCreateUpdateStateAndPush (
ACPI_OPERAND_OBJECT *Object,
UINT16 Action,
ACPI_GENERIC_STATE **StateList)
{
ACPI_GENERIC_STATE *State;
ACPI_FUNCTION_ENTRY ();
/* Ignore null objects; these are expected */
if (!Object)
{
return (AE_OK);
}
State = AcpiUtCreateUpdateState (Object, Action);
if (!State)
{
return (AE_NO_MEMORY);
}
AcpiUtPushGenericState (StateList, State);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtWalkPackageTree
*
* PARAMETERS: SourceObject - The package to walk
* TargetObject - Target object (if package is being copied)
* WalkCallback - Called once for each package element
* Context - Passed to the callback function
*
* RETURN: Status
*
* DESCRIPTION: Walk through a package
*
******************************************************************************/
ACPI_STATUS
AcpiUtWalkPackageTree (
ACPI_OPERAND_OBJECT *SourceObject,
void *TargetObject,
ACPI_PKG_CALLBACK WalkCallback,
void *Context)
{
ACPI_STATUS Status = AE_OK;
ACPI_GENERIC_STATE *StateList = NULL;
ACPI_GENERIC_STATE *State;
UINT32 ThisIndex;
ACPI_OPERAND_OBJECT *ThisSourceObj;
ACPI_FUNCTION_TRACE ("UtWalkPackageTree");
State = AcpiUtCreatePkgState (SourceObject, TargetObject, 0);
if (!State)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
while (State)
{
/* Get one element of the package */
ThisIndex = State->Pkg.Index;
ThisSourceObj = (ACPI_OPERAND_OBJECT *)
State->Pkg.SourceObject->Package.Elements[ThisIndex];
/*
* Check for:
* 1) An uninitialized package element. It is completely
* legal to declare a package and leave it uninitialized
* 2) Not an internal object - can be a namespace node instead
* 3) Any type other than a package. Packages are handled in else
* case below.
*/
if ((!ThisSourceObj) ||
(ACPI_GET_DESCRIPTOR_TYPE (ThisSourceObj) != ACPI_DESC_TYPE_OPERAND) ||
(ACPI_GET_OBJECT_TYPE (ThisSourceObj) != ACPI_TYPE_PACKAGE))
{
Status = WalkCallback (ACPI_COPY_TYPE_SIMPLE, ThisSourceObj,
State, Context);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
State->Pkg.Index++;
while (State->Pkg.Index >= State->Pkg.SourceObject->Package.Count)
{
/*
* We've handled all of the objects at this level, This means
* that we have just completed a package. That package may
* have contained one or more packages itself.
*
* Delete this state and pop the previous state (package).
*/
AcpiUtDeleteGenericState (State);
State = AcpiUtPopGenericState (&StateList);
/* Finished when there are no more states */
if (!State)
{
/*
* We have handled all of the objects in the top level
* package just add the length of the package objects
* and exit
*/
return_ACPI_STATUS (AE_OK);
}
/*
* Go back up a level and move the index past the just
* completed package object.
*/
State->Pkg.Index++;
}
}
else
{
/* This is a subobject of type package */
Status = WalkCallback (ACPI_COPY_TYPE_PACKAGE, ThisSourceObj,
State, Context);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Push the current state and create a new one
* The callback above returned a new target package object.
*/
AcpiUtPushGenericState (&StateList, State);
State = AcpiUtCreatePkgState (ThisSourceObj,
State->Pkg.ThisTargetObj, 0);
if (!State)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
}
/* We should never get here */
return_ACPI_STATUS (AE_AML_INTERNAL);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGenerateChecksum
*
* PARAMETERS: Buffer - Buffer to be scanned
* Length - number of bytes to examine
*
* RETURN: The generated checksum
*
* DESCRIPTION: Generate a checksum on a raw buffer
*
******************************************************************************/
UINT8
AcpiUtGenerateChecksum (
UINT8 *Buffer,
UINT32 Length)
{
UINT32 i;
signed char Sum = 0;
for (i = 0; i < Length; i++)
{
Sum = (signed char) (Sum + Buffer[i]);
}
return ((UINT8) (0 - Sum));
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceType
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: The Resource Type with no extraneous bits (except the
* Large/Small descriptor bit -- this is left alone)
*
* DESCRIPTION: Extract the Resource Type/Name from the first byte of
* a resource descriptor.
*
******************************************************************************/
UINT8
AcpiUtGetResourceType (
void *Aml)
{
ACPI_FUNCTION_ENTRY ();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Determine if this is a small or large resource
*/
if (*((UINT8 *) Aml) & ACPI_RESOURCE_NAME_LARGE)
{
/* Large Resource Type -- bits 6:0 contain the name */
return (*((UINT8 *) Aml));
}
else
{
/* Small Resource Type -- bits 6:3 contain the name */
return ((UINT8) (*((UINT8 *) Aml) & ACPI_RESOURCE_NAME_SMALL_MASK));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceLength
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte Length
*
* DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By
* definition, this does not include the size of the descriptor
* header or the length field itself.
*
******************************************************************************/
UINT16
AcpiUtGetResourceLength (
void *Aml)
{
UINT16 ResourceLength;
ACPI_FUNCTION_ENTRY ();
/*
* Byte 0 contains the descriptor name (Resource Type)
* Determine if this is a small or large resource
*/
if (*((UINT8 *) Aml) & ACPI_RESOURCE_NAME_LARGE)
{
/* Large Resource type -- bytes 1-2 contain the 16-bit length */
ACPI_MOVE_16_TO_16 (&ResourceLength, &((UINT8 *) Aml)[1]);
}
else
{
/* Small Resource type -- bits 2:0 of byte 0 contain the length */
ResourceLength = (UINT16) (*((UINT8 *) Aml) &
ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK);
}
return (ResourceLength);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetDescriptorLength
*
* PARAMETERS: Aml - Pointer to the raw AML resource descriptor
*
* RETURN: Byte length
*
* DESCRIPTION: Get the total byte length of a raw AML descriptor, including the
* length of the descriptor header and the length field itself.
* Used to walk descriptor lists.
*
******************************************************************************/
UINT32
AcpiUtGetDescriptorLength (
void *Aml)
{
UINT32 DescriptorLength;
ACPI_FUNCTION_ENTRY ();
/* First get the Resource Length (Does not include header length) */
DescriptorLength = AcpiUtGetResourceLength (Aml);
/* Determine if this is a small or large resource */
if (*((UINT8 *) Aml) & ACPI_RESOURCE_NAME_LARGE)
{
DescriptorLength += sizeof (AML_RESOURCE_LARGE_HEADER);
}
else
{
DescriptorLength += sizeof (AML_RESOURCE_SMALL_HEADER);
}
return (DescriptorLength);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtGetResourceEndTag
*
* PARAMETERS: ObjDesc - The resource template buffer object
*
* RETURN: Pointer to the end tag
*
* DESCRIPTION: Find the END_TAG resource descriptor in an AML resource template
*
******************************************************************************/
UINT8 *
AcpiUtGetResourceEndTag (
ACPI_OPERAND_OBJECT *ObjDesc)
{
UINT8 *Aml;
UINT8 *EndAml;
Aml = ObjDesc->Buffer.Pointer;
EndAml = Aml + ObjDesc->Buffer.Length;
/* Walk the resource template, one descriptor per loop */
while (Aml < EndAml)
{
if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_END_TAG)
{
/* Found the end_tag descriptor, all done */
return (Aml);
}
/* Point to the next resource descriptor */
Aml += AcpiUtGetResourceLength (Aml);
}
/* End tag was not found */
return (NULL);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtReportError
*
* PARAMETERS: ModuleName - Caller's module name (for error output)
* LineNumber - Caller's line number (for error output)
* ComponentId - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print error message
*
******************************************************************************/
void
AcpiUtReportError (
char *ModuleName,
UINT32 LineNumber,
UINT32 ComponentId)
{
AcpiOsPrintf ("%8s-%04d: *** Error: ", ModuleName, LineNumber);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtReportWarning
*
* PARAMETERS: ModuleName - Caller's module name (for error output)
* LineNumber - Caller's line number (for error output)
* ComponentId - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print warning message
*
******************************************************************************/
void
AcpiUtReportWarning (
char *ModuleName,
UINT32 LineNumber,
UINT32 ComponentId)
{
AcpiOsPrintf ("%8s-%04d: *** Warning: ", ModuleName, LineNumber);
}
/*******************************************************************************
*
* FUNCTION: AcpiUtReportInfo
*
* PARAMETERS: ModuleName - Caller's module name (for error output)
* LineNumber - Caller's line number (for error output)
* ComponentId - Caller's component ID (for error output)
*
* RETURN: None
*
* DESCRIPTION: Print information message
*
******************************************************************************/
void
AcpiUtReportInfo (
char *ModuleName,
UINT32 LineNumber,
UINT32 ComponentId)
{
AcpiOsPrintf ("%8s-%04d: *** Info: ", ModuleName, LineNumber);
}