/*******************************************************************************
*
* Module Name: utmisc - common utility procedures
*
******************************************************************************/
/*
* Copyright (C) 2000 - 2016, 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 "acnamesp.h"
#define _COMPONENT ACPI_UTILITIES
ACPI_MODULE_NAME ("utmisc")
/*******************************************************************************
*
* FUNCTION: AcpiUtIsPciRootBridge
*
* PARAMETERS: Id - The HID/CID in string format
*
* RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge
*
* DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID.
*
******************************************************************************/
BOOLEAN
AcpiUtIsPciRootBridge (
char *Id)
{
/*
* Check if this is a PCI root bridge.
* ACPI 3.0+: check for a PCI Express root also.
*/
if (!(strcmp (Id,
PCI_ROOT_HID_STRING)) ||
!(strcmp (Id,
PCI_EXPRESS_ROOT_HID_STRING)))
{
return (TRUE);
}
return (FALSE);
}
#if (defined ACPI_ASL_COMPILER || defined ACPI_EXEC_APP || defined ACPI_NAMES_APP)
/*******************************************************************************
*
* FUNCTION: AcpiUtIsAmlTable
*
* PARAMETERS: Table - An ACPI table
*
* RETURN: TRUE if table contains executable AML; FALSE otherwise
*
* DESCRIPTION: Check ACPI Signature for a table that contains AML code.
* Currently, these are DSDT,SSDT,PSDT. All other table types are
* data tables that do not contain AML code.
*
******************************************************************************/
BOOLEAN
AcpiUtIsAmlTable (
ACPI_TABLE_HEADER *Table)
{
/* These are the only tables that contain executable AML */
if (ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_DSDT) ||
ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_PSDT) ||
ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_SSDT) ||
ACPI_COMPARE_NAME (Table->Signature, ACPI_SIG_OSDT))
{
return (TRUE);
}
return (FALSE);
}
#endif
/*******************************************************************************
*
* 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 < 2)
{
/* 32-bit case */
AcpiGbl_IntegerBitWidth = 32;
AcpiGbl_IntegerNybbleWidth = 8;
AcpiGbl_IntegerByteWidth = 4;
}
else
{
/* 64-bit case (ACPI 2.0+) */
AcpiGbl_IntegerBitWidth = 64;
AcpiGbl_IntegerNybbleWidth = 16;
AcpiGbl_IntegerByteWidth = 8;
}
}
/*******************************************************************************
*
* 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) ||
(ThisSourceObj->Common.Type != 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)
{
/* Free any stacked Update State objects */
while (StateList)
{
State = AcpiUtPopGenericState (&StateList);
AcpiUtDeleteGenericState (State);
}
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
}
/* We should never get here */
return_ACPI_STATUS (AE_AML_INTERNAL);
}
#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,
const 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, TRUE);
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_FREE (Buffer.Pointer);
}
#endif