NetBSD-5.0.2/sys/dist/acpica/nsinit.c
/******************************************************************************
*
* Module Name: nsinit - namespace initialization
* $Revision: 1.6 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2008, 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 __NSXFINIT_C__
#include "acpi.h"
#include "acnamesp.h"
#include "acdispat.h"
#include "acinterp.h"
#define _COMPONENT ACPI_NAMESPACE
ACPI_MODULE_NAME ("nsinit")
/* Local prototypes */
static ACPI_STATUS
AcpiNsInitOneObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_STATUS
AcpiNsInitOneDevice (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue);
static ACPI_STATUS
AcpiNsFindIniMethods (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue);
/*******************************************************************************
*
* FUNCTION: AcpiNsInitializeObjects
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Walk the entire namespace and perform any necessary
* initialization on the objects found therein
*
******************************************************************************/
ACPI_STATUS
AcpiNsInitializeObjects (
void)
{
ACPI_STATUS Status;
ACPI_INIT_WALK_INFO Info;
ACPI_FUNCTION_TRACE (NsInitializeObjects);
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"**** Starting initialization of namespace objects ****\n"));
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Completing Region/Field/Buffer/Package initialization:"));
/* Set all init info to zero */
ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO));
/* Walk entire namespace from the supplied root */
Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, AcpiNsInitOneObject,
&Info, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace"));
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd Buffers %hd/%hd Packages (%hd nodes)\n",
Info.OpRegionInit, Info.OpRegionCount,
Info.FieldInit, Info.FieldCount,
Info.BufferInit, Info.BufferCount,
Info.PackageInit, Info.PackageCount, Info.ObjectCount));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%hd Control Methods found\n", Info.MethodCount));
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
"%hd Op Regions found\n", Info.OpRegionCount));
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitializeDevices
*
* PARAMETERS: None
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: Walk the entire namespace and initialize all ACPI devices.
* This means running _INI on all present devices.
*
* Note: We install PCI config space handler on region access,
* not here.
*
******************************************************************************/
ACPI_STATUS
AcpiNsInitializeDevices (
void)
{
ACPI_STATUS Status;
ACPI_DEVICE_WALK_INFO Info;
ACPI_FUNCTION_TRACE (NsInitializeDevices);
/* Init counters */
Info.DeviceCount = 0;
Info.Num_STA = 0;
Info.Num_INI = 0;
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"Initializing Device/Processor/Thermal objects by executing _INI methods:"));
/* Tree analysis: find all subtrees that contain _INI methods */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, &Info, NULL);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
/* Allocate the evaluation information block */
Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info.EvaluateInfo)
{
Status = AE_NO_MEMORY;
goto ErrorExit;
}
/* Walk namespace to execute all _INIs on present devices */
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, &Info, NULL);
ACPI_FREE (Info.EvaluateInfo);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
"\nExecuted %hd _INI methods requiring %hd _STA executions (examined %hd objects)\n",
Info.Num_INI, Info.Num_STA, Info.DeviceCount));
return_ACPI_STATUS (Status);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization"));
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitOneObject
*
* PARAMETERS: ObjHandle - Node
* Level - Current nesting level
* Context - Points to a init info struct
* ReturnValue - Not used
*
* RETURN: Status
*
* DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object
* within the namespace.
*
* Currently, the only objects that require initialization are:
* 1) Methods
* 2) Op Regions
*
******************************************************************************/
static ACPI_STATUS
AcpiNsInitOneObject (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_OBJECT_TYPE Type;
ACPI_STATUS Status = AE_OK;
ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context;
ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_FUNCTION_NAME (NsInitOneObject);
Info->ObjectCount++;
/* And even then, we are only interested in a few object types */
Type = AcpiNsGetType (ObjHandle);
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
return (AE_OK);
}
/* Increment counters for object types we are looking for */
switch (Type)
{
case ACPI_TYPE_REGION:
Info->OpRegionCount++;
break;
case ACPI_TYPE_BUFFER_FIELD:
Info->FieldCount++;
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
Info->FieldCount++;
break;
case ACPI_TYPE_BUFFER:
Info->BufferCount++;
break;
case ACPI_TYPE_PACKAGE:
Info->PackageCount++;
break;
default:
/* No init required, just exit now */
return (AE_OK);
}
/*
* If the object is already initialized, nothing else to do
*/
if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
{
return (AE_OK);
}
/*
* Must lock the interpreter before executing AML code
*/
AcpiExEnterInterpreter ();
/*
* Each of these types can contain executable AML code within the
* declaration.
*/
switch (Type)
{
case ACPI_TYPE_REGION:
Info->OpRegionInit++;
Status = AcpiDsGetRegionArguments (ObjDesc);
break;
case ACPI_TYPE_BUFFER_FIELD:
Info->FieldInit++;
Status = AcpiDsGetBufferFieldArguments (ObjDesc);
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
Info->FieldInit++;
Status = AcpiDsGetBankFieldArguments (ObjDesc);
break;
case ACPI_TYPE_BUFFER:
Info->BufferInit++;
Status = AcpiDsGetBufferArguments (ObjDesc);
break;
case ACPI_TYPE_PACKAGE:
Info->PackageInit++;
Status = AcpiDsGetPackageArguments (ObjDesc);
break;
default:
/* No other types can get here */
break;
}
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not execute arguments for [%4.4s] (%s)",
AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type)));
}
/*
* Print a dot for each object unless we are going to print the entire
* pathname
*/
if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
{
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
}
/*
* We ignore errors from above, and always return OK, since we don't want
* to abort the walk on any single error.
*/
AcpiExExitInterpreter ();
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsFindIniMethods
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: Called during namespace walk. Finds objects named _INI under
* device/processor/thermal objects, and marks the entire subtree
* with a SUBTREE_HAS_INI flag. This flag is used during the
* subsequent device initialization walk to avoid entire subtrees
* that do not contain an _INI.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsFindIniMethods (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
ACPI_NAMESPACE_NODE *Node;
ACPI_NAMESPACE_NODE *ParentNode;
/* Keep count of device/processor/thermal objects */
Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
if ((Node->Type == ACPI_TYPE_DEVICE) ||
(Node->Type == ACPI_TYPE_PROCESSOR) ||
(Node->Type == ACPI_TYPE_THERMAL))
{
Info->DeviceCount++;
return (AE_OK);
}
/* We are only looking for methods named _INI */
if (ACPI_STRNCMP (Node->Name.Ascii, METHOD_NAME__INI, 4))
{
return (AE_OK);
}
/*
* The only _INI methods that we care about are those that are
* present under Device, Processor, and Thermal objects.
*/
ParentNode = AcpiNsGetParentNode (Node);
switch (ParentNode->Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* Mark parent and bubble up the INI present flag to the root */
while (ParentNode)
{
ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI;
ParentNode = AcpiNsGetParentNode (ParentNode);
}
break;
default:
break;
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiNsInitOneDevice
*
* PARAMETERS: ACPI_WALK_CALLBACK
*
* RETURN: ACPI_STATUS
*
* DESCRIPTION: This is called once per device soon after ACPI is enabled
* to initialize each device. It determines if the device is
* present, and if so, calls _INI.
*
******************************************************************************/
static ACPI_STATUS
AcpiNsInitOneDevice (
ACPI_HANDLE ObjHandle,
UINT32 NestingLevel,
void *Context,
void **ReturnValue)
{
ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context);
ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo;
UINT32 Flags;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *DeviceNode;
ACPI_FUNCTION_TRACE (NsInitOneDevice);
/* We are interested in Devices, Processors and ThermalZones only */
DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
if ((DeviceNode->Type != ACPI_TYPE_DEVICE) &&
(DeviceNode->Type != ACPI_TYPE_PROCESSOR) &&
(DeviceNode->Type != ACPI_TYPE_THERMAL))
{
return_ACPI_STATUS (AE_OK);
}
/*
* Because of an earlier namespace analysis, all subtrees that contain an
* _INI method are tagged.
*
* If this device subtree does not contain any _INI methods, we
* can exit now and stop traversing this entire subtree.
*/
if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI))
{
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
/*
* Run _STA to determine if this device is present and functioning. We
* must know this information for two important reasons (from ACPI spec):
*
* 1) We can only run _INI if the device is present.
* 2) We must abort the device tree walk on this subtree if the device is
* not present and is not functional (we will not examine the children)
*
* The _STA method is not required to be present under the device, we
* assume the device is present if _STA does not exist.
*/
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA));
Status = AcpiUtExecute_STA (DeviceNode, &Flags);
if (ACPI_FAILURE (Status))
{
/* Ignore error and move on to next device */
return_ACPI_STATUS (AE_OK);
}
/*
* Flags == -1 means that _STA was not found. In this case, we assume that
* the device is both present and functional.
*
* From the ACPI spec, description of _STA:
*
* "If a device object (including the processor object) does not have an
* _STA object, then OSPM assumes that all of the above bits are set (in
* other words, the device is present, ..., and functioning)"
*/
if (Flags != ACPI_UINT32_MAX)
{
WalkInfo->Num_STA++;
}
/*
* Examine the PRESENT and FUNCTIONING status bits
*
* Note: ACPI spec does not seem to specify behavior for the present but
* not functioning case, so we assume functioning if present.
*/
if (!(Flags & ACPI_STA_DEVICE_PRESENT))
{
/* Device is not present, we must examine the Functioning bit */
if (Flags & ACPI_STA_DEVICE_FUNCTIONING)
{
/*
* Device is not present but is "functioning". In this case,
* we will not run _INI, but we continue to examine the children
* of this device.
*
* From the ACPI spec, description of _STA: (Note - no mention
* of whether to run _INI or not on the device in question)
*
* "_STA may return bit 0 clear (not present) with bit 3 set
* (device is functional). This case is used to indicate a valid
* device for which no device driver should be loaded (for example,
* a bridge device.) Children of this device may be present and
* valid. OSPM should continue enumeration below a device whose
* _STA returns this bit combination"
*/
return_ACPI_STATUS (AE_OK);
}
else
{
/*
* Device is not present and is not functioning. We must abort the
* walk of this subtree immediately -- don't look at the children
* of such a device.
*
* From the ACPI spec, description of _INI:
*
* "If the _STA method indicates that the device is not present,
* OSPM will not run the _INI and will not examine the children
* of the device for _INI methods"
*/
return_ACPI_STATUS (AE_CTRL_DEPTH);
}
}
/*
* The device is present or is assumed present if no _STA exists.
* Run the _INI if it exists (not required to exist)
*
* Note: We know there is an _INI within this subtree, but it may not be
* under this particular device, it may be lower in the branch.
*/
ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname (
ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI));
Info->PrefixNode = DeviceNode;
Info->Pathname = METHOD_NAME__INI;
Info->Parameters = NULL;
Info->ParameterType = ACPI_PARAM_ARGS;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
Status = AcpiNsEvaluate (Info);
if (ACPI_SUCCESS (Status))
{
WalkInfo->Num_INI++;
if ((AcpiDbgLevel <= ACPI_LV_ALL_EXCEPTIONS) &&
(!(AcpiDbgLevel & ACPI_LV_INFO)))
{
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
}
}
#ifdef ACPI_DEBUG_OUTPUT
else if (Status != AE_NOT_FOUND)
{
/* Ignore error and move on to next device */
char *ScopeName = AcpiNsGetExternalPathname (Info->ResolvedNode);
ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution",
ScopeName));
ACPI_FREE (ScopeName);
}
#endif
/* Ignore errors from above */
Status = AE_OK;
/*
* The _INI method has been run if present; call the Global Initialization
* Handler for this device.
*/
if (AcpiGbl_InitHandler)
{
Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI);
}
return_ACPI_STATUS (Status);
}