NetBSD-5.0.2/sys/dist/acpica/evrgnini.c
/******************************************************************************
*
* Module Name: evrgnini- ACPI AddressSpace (OpRegion) init
* $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 __EVRGNINI_C__
#include "acpi.h"
#include "acevents.h"
#include "acnamesp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evrgnini")
/* Local prototypes */
static BOOLEAN
AcpiEvMatchPciRootBridge (
char *Id);
static BOOLEAN
AcpiEvIsPciRootBridge (
ACPI_NAMESPACE_NODE *Node);
/*******************************************************************************
*
* FUNCTION: AcpiEvSystemMemoryRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a SystemMemory operation region
*
******************************************************************************/
ACPI_STATUS
AcpiEvSystemMemoryRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;
ACPI_MEM_SPACE_CONTEXT *LocalRegionContext;
ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
if (*RegionContext)
{
LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext;
/* Delete a cached mapping if present */
if (LocalRegionContext->MappedLength)
{
AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress,
LocalRegionContext->MappedLength);
}
ACPI_FREE (LocalRegionContext);
*RegionContext = NULL;
}
return_ACPI_STATUS (AE_OK);
}
/* Create a new context */
LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT));
if (!(LocalRegionContext))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Save the region length and address for use in the handler */
LocalRegionContext->Length = RegionDesc->Region.Length;
LocalRegionContext->Address = RegionDesc->Region.Address;
*RegionContext = LocalRegionContext;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvIoSpaceRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a IO operation region
*
******************************************************************************/
ACPI_STATUS
AcpiEvIoSpaceRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
*RegionContext = NULL;
}
else
{
*RegionContext = HandlerContext;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvPciConfigRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a PCI_Config operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvPciConfigRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_STATUS Status = AE_OK;
ACPI_INTEGER PciValue;
ACPI_PCI_ID *PciId = *RegionContext;
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_NAMESPACE_NODE *ParentNode;
ACPI_NAMESPACE_NODE *PciRootNode;
ACPI_NAMESPACE_NODE *PciDeviceNode;
ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle;
ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);
HandlerObj = RegionObj->Region.Handler;
if (!HandlerObj)
{
/*
* No installed handler. This shouldn't happen because the dispatch
* routine checks before we get here, but we check again just in case.
*/
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Attempting to init a region %p, with no handler\n", RegionObj));
return_ACPI_STATUS (AE_NOT_EXIST);
}
*RegionContext = NULL;
if (Function == ACPI_REGION_DEACTIVATE)
{
if (PciId)
{
ACPI_FREE (PciId);
}
return_ACPI_STATUS (Status);
}
ParentNode = AcpiNsGetParentNode (RegionObj->Region.Node);
/*
* Get the _SEG and _BBN values from the device upon which the handler
* is installed.
*
* We need to get the _SEG and _BBN objects relative to the PCI BUS device.
* This is the device the handler has been registered to handle.
*/
/*
* If the AddressSpace.Node is still pointing to the root, we need
* to scan upward for a PCI Root bridge and re-associate the OpRegion
* handlers with that device.
*/
if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)
{
/* Start search from the parent object */
PciRootNode = ParentNode;
while (PciRootNode != AcpiGbl_RootNode)
{
/* Get the _HID/_CID in order to detect a RootBridge */
if (AcpiEvIsPciRootBridge (PciRootNode))
{
/* Install a handler for this PCI root bridge */
Status = AcpiInstallAddressSpaceHandler (
(ACPI_HANDLE) PciRootNode,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if (ACPI_FAILURE (Status))
{
if (Status == AE_SAME_HANDLER)
{
/*
* It is OK if the handler is already installed on the root
* bridge. Still need to return a context object for the
* new PCI_Config operation region, however.
*/
Status = AE_OK;
}
else
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not install PciConfig handler for Root Bridge %4.4s",
AcpiUtGetNodeName (PciRootNode)));
}
}
break;
}
PciRootNode = AcpiNsGetParentNode (PciRootNode);
}
/* PCI root bridge not found, use namespace root node */
}
else
{
PciRootNode = HandlerObj->AddressSpace.Node;
}
/*
* If this region is now initialized, we are done.
* (InstallAddressSpaceHandler could have initialized it)
*/
if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
{
return_ACPI_STATUS (AE_OK);
}
/* Region is still not initialized. Create a new context */
PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID));
if (!PciId)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* For PCI_Config space access, we need the segment, bus,
* device and function numbers. Acquire them here.
*
* Find the parent device object. (This allows the operation region to be
* within a subscope under the device, such as a control method.)
*/
PciDeviceNode = RegionObj->Region.Node;
while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE))
{
PciDeviceNode = AcpiNsGetParentNode (PciDeviceNode);
}
if (!PciDeviceNode)
{
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* Get the PCI device and function numbers from the _ADR object
* contained in the parent's scope.
*/
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, PciDeviceNode, &PciValue);
/*
* The default is zero, and since the allocation above zeroed
* the data, just do nothing on failure.
*/
if (ACPI_SUCCESS (Status))
{
PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue));
PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue));
}
/* The PCI segment number comes from the _SEG method */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, PciRootNode, &PciValue);
if (ACPI_SUCCESS (Status))
{
PciId->Segment = ACPI_LOWORD (PciValue);
}
/* The PCI bus number comes from the _BBN method */
Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, PciRootNode, &PciValue);
if (ACPI_SUCCESS (Status))
{
PciId->Bus = ACPI_LOWORD (PciValue);
}
/* Complete this device's PciId */
AcpiOsDerivePciId (PciRootNode, RegionObj->Region.Node, &PciId);
*RegionContext = PciId;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvMatchPciRootBridge
*
* 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.
*
******************************************************************************/
static BOOLEAN
AcpiEvMatchPciRootBridge (
char *Id)
{
/*
* Check if this is a PCI root.
* ACPI 3.0+: check for a PCI Express root also.
*/
if (!(ACPI_STRNCMP (Id,
PCI_ROOT_HID_STRING,
sizeof (PCI_ROOT_HID_STRING))) ||
!(ACPI_STRNCMP (Id,
PCI_EXPRESS_ROOT_HID_STRING,
sizeof (PCI_EXPRESS_ROOT_HID_STRING))))
{
return (TRUE);
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvIsPciRootBridge
*
* PARAMETERS: Node - Device node being examined
*
* RETURN: TRUE if device is a PCI/PCI-Express Root Bridge
*
* DESCRIPTION: Determine if the input device represents a PCI Root Bridge by
* examining the _HID and _CID for the device.
*
******************************************************************************/
static BOOLEAN
AcpiEvIsPciRootBridge (
ACPI_NAMESPACE_NODE *Node)
{
ACPI_STATUS Status;
ACPI_DEVICE_ID Hid;
ACPI_COMPATIBLE_ID_LIST *Cid;
ACPI_NATIVE_UINT i;
/*
* Get the _HID and check for a PCI Root Bridge
*/
Status = AcpiUtExecute_HID (Node, &Hid);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
if (AcpiEvMatchPciRootBridge (Hid.Value))
{
return (TRUE);
}
/*
* The _HID did not match.
* Get the _CID and check for a PCI Root Bridge
*/
Status = AcpiUtExecute_CID (Node, &Cid);
if (ACPI_FAILURE (Status))
{
return (FALSE);
}
/* Check all _CIDs in the returned list */
for (i = 0; i < Cid->Count; i++)
{
if (AcpiEvMatchPciRootBridge (Cid->Id[i].Value))
{
ACPI_FREE (Cid);
return (TRUE);
}
}
ACPI_FREE (Cid);
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvPciBarRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a PciBAR operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvPciBarRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvPciBarRegionSetup);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvCmosRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Setup a CMOS operation region
*
* MUTEX: Assumes namespace is not locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvCmosRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvCmosRegionSetup);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDefaultRegionSetup
*
* PARAMETERS: Handle - Region we are interested in
* Function - Start or stop
* HandlerContext - Address space handler context
* RegionContext - Region specific context
*
* RETURN: Status
*
* DESCRIPTION: Default region initialization
*
******************************************************************************/
ACPI_STATUS
AcpiEvDefaultRegionSetup (
ACPI_HANDLE Handle,
UINT32 Function,
void *HandlerContext,
void **RegionContext)
{
ACPI_FUNCTION_TRACE (EvDefaultRegionSetup);
if (Function == ACPI_REGION_DEACTIVATE)
{
*RegionContext = NULL;
}
else
{
*RegionContext = HandlerContext;
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInitializeRegion
*
* PARAMETERS: RegionObj - Region we are initializing
* AcpiNsLocked - Is namespace locked?
*
* RETURN: Status
*
* DESCRIPTION: Initializes the region, finds any _REG methods and saves them
* for execution at a later time
*
* Get the appropriate address space handler for a newly
* created region.
*
* This also performs address space specific initialization. For
* example, PCI regions must have an _ADR object that contains
* a PCI address in the scope of the definition. This address is
* required to perform an access to PCI config space.
*
* MUTEX: Interpreter should be unlocked, because we may run the _REG
* method for this region.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitializeRegion (
ACPI_OPERAND_OBJECT *RegionObj,
BOOLEAN AcpiNsLocked)
{
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_ADR_SPACE_TYPE SpaceId;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_NAMESPACE_NODE *MethodNode;
const ACPI_NAME *RegNamePtr = (const ACPI_NAME *) METHOD_NAME__REG;
ACPI_OPERAND_OBJECT *RegionObj2;
ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked);
if (!RegionObj)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)
{
return_ACPI_STATUS (AE_OK);
}
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
Node = AcpiNsGetParentNode (RegionObj->Region.Node);
SpaceId = RegionObj->Region.SpaceId;
/* Setup defaults */
RegionObj->Region.Handler = NULL;
RegionObj2->Extra.Method_REG = NULL;
RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;
/* Find any "_REG" method associated with this region definition */
Status = AcpiNsSearchOneScope (
*RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode);
if (ACPI_SUCCESS (Status))
{
/*
* The _REG method is optional and there can be only one per region
* definition. This will be executed when the handler is attached
* or removed
*/
RegionObj2->Extra.Method_REG = MethodNode;
}
/*
* The following loop depends upon the root Node having no parent
* ie: AcpiGbl_RootNode->ParentEntry being set to NULL
*/
while (Node)
{
/* Check to see if a handler exists */
HandlerObj = NULL;
ObjDesc = AcpiNsGetAttachedObject (Node);
if (ObjDesc)
{
/* Can only be a handler if the object exists */
switch (Node->Type)
{
case ACPI_TYPE_DEVICE:
HandlerObj = ObjDesc->Device.Handler;
break;
case ACPI_TYPE_PROCESSOR:
HandlerObj = ObjDesc->Processor.Handler;
break;
case ACPI_TYPE_THERMAL:
HandlerObj = ObjDesc->ThermalZone.Handler;
break;
default:
/* Ignore other objects */
break;
}
while (HandlerObj)
{
/* Is this handler of the correct type? */
if (HandlerObj->AddressSpace.SpaceId == SpaceId)
{
/* Found correct handler */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Found handler %p for region %p in obj %p\n",
HandlerObj, RegionObj, ObjDesc));
Status = AcpiEvAttachRegion (HandlerObj, RegionObj,
AcpiNsLocked);
/*
* Tell all users that this region is usable by running the _REG
* method
*/
if (AcpiNsLocked)
{
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
Status = AcpiEvExecuteRegMethod (RegionObj, 1);
if (AcpiNsLocked)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
return_ACPI_STATUS (AE_OK);
}
/* Try next handler in the list */
HandlerObj = HandlerObj->AddressSpace.Next;
}
}
/*
* This node does not have the handler we need;
* Pop up one level
*/
Node = AcpiNsGetParentNode (Node);
}
/* If we get here, there is no handler for this region */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"No handler for RegionType %s(%X) (RegionObj %p)\n",
AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj));
return_ACPI_STATUS (AE_NOT_EXIST);
}