1 /******************************************************************************
3 * Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
6 *****************************************************************************/
8 /******************************************************************************
12 * Some or all of this work - Copyright (c) 1999 - 2010, Intel Corp.
13 * All rights reserved.
17 * 2.1. This is your license from Intel Corp. under its intellectual property
18 * rights. You may have additional license terms from the party that provided
19 * you this software, covering your right to use that party's intellectual
22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
23 * copy of the source code appearing in this file ("Covered Code") an
24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
25 * base code distributed originally by Intel ("Original Intel Code") to copy,
26 * make derivatives, distribute, use and display any portion of the Covered
27 * Code in any form, with the right to sublicense such rights; and
29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
30 * license (with the right to sublicense), under only those claims of Intel
31 * patents that are infringed by the Original Intel Code, to make, use, sell,
32 * offer to sell, and import the Covered Code and derivative works thereof
33 * solely to the minimum extent necessary to exercise the above copyright
34 * license, and in no event shall the patent license extend to any additions
35 * to or modifications of the Original Intel Code. No other license or right
36 * is granted directly or by implication, estoppel or otherwise;
38 * The above copyright and patent license is granted only if the following
43 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
44 * Redistribution of source code of any substantial portion of the Covered
45 * Code or modification with rights to further distribute source must include
46 * the above Copyright Notice, the above License, this list of Conditions,
47 * and the following Disclaimer and Export Compliance provision. In addition,
48 * Licensee must cause all Covered Code to which Licensee contributes to
49 * contain a file documenting the changes Licensee made to create that Covered
50 * Code and the date of any change. Licensee must include in that file the
51 * documentation of any changes made by any predecessor Licensee. Licensee
52 * must include a prominent statement that the modification is derived,
53 * directly or indirectly, from Original Intel Code.
55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
56 * Redistribution of source code of any substantial portion of the Covered
57 * Code or modification without rights to further distribute source must
58 * include the following Disclaimer and Export Compliance provision in the
59 * documentation and/or other materials provided with distribution. In
60 * addition, Licensee may not authorize further sublicense of source of any
61 * portion of the Covered Code, and must include terms to the effect that the
62 * license from Licensee to its licensee is limited to the intellectual
63 * property embodied in the software Licensee provides to its licensee, and
64 * not to intellectual property embodied in modifications its licensee may
67 * 3.3. Redistribution of Executable. Redistribution in executable form of any
68 * substantial portion of the Covered Code or modification must reproduce the
69 * above Copyright Notice, and the following Disclaimer and Export Compliance
70 * provision in the documentation and/or other materials provided with the
73 * 3.4. Intel retains all right, title, and interest in and to the Original
76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
77 * Intel shall be used in advertising or otherwise to promote the sale, use or
78 * other dealings in products derived from or relating to the Covered Code
79 * without prior written authorization from Intel.
81 * 4. Disclaimer and Export Compliance
83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
115 *****************************************************************************/
117 #define __EVXFREGN_C__
119 #include <contrib/dev/acpica/include/acpi.h>
120 #include <contrib/dev/acpica/include/accommon.h>
121 #include <contrib/dev/acpica/include/acnamesp.h>
122 #include <contrib/dev/acpica/include/acevents.h>
124 #define _COMPONENT ACPI_EVENTS
125 ACPI_MODULE_NAME ("evxfregn")
128 /*******************************************************************************
130 * FUNCTION: AcpiInstallAddressSpaceHandler
132 * PARAMETERS: Device - Handle for the device
133 * SpaceId - The address space ID
134 * Handler - Address of the handler
135 * Setup - Address of the setup function
136 * Context - Value passed to the handler on each access
140 * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
142 * NOTE: This function should only be called after AcpiEnableSubsystem has
143 * been called. This is because any _REG methods associated with the Space ID
144 * are executed here, and these methods can only be safely executed after
145 * the default handlers have been installed and the hardware has been
146 * initialized (via AcpiEnableSubsystem.)
148 ******************************************************************************/
151 AcpiInstallAddressSpaceHandler (
153 ACPI_ADR_SPACE_TYPE SpaceId,
154 ACPI_ADR_SPACE_HANDLER Handler,
155 ACPI_ADR_SPACE_SETUP Setup,
158 ACPI_NAMESPACE_NODE *Node;
162 ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler);
165 /* Parameter validation */
169 return_ACPI_STATUS (AE_BAD_PARAMETER);
172 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
173 if (ACPI_FAILURE (Status))
175 return_ACPI_STATUS (Status);
178 /* Convert and validate the device handle */
180 Node = AcpiNsValidateHandle (Device);
183 Status = AE_BAD_PARAMETER;
187 /* Install the handler for all Regions for this Space ID */
189 Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context);
190 if (ACPI_FAILURE (Status))
195 /* Run all _REG methods for this address space */
197 Status = AcpiEvExecuteRegMethods (Node, SpaceId);
200 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
201 return_ACPI_STATUS (Status);
204 ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler)
207 /*******************************************************************************
209 * FUNCTION: AcpiRemoveAddressSpaceHandler
211 * PARAMETERS: Device - Handle for the device
212 * SpaceId - The address space ID
213 * Handler - Address of the handler
217 * DESCRIPTION: Remove a previously installed handler.
219 ******************************************************************************/
222 AcpiRemoveAddressSpaceHandler (
224 ACPI_ADR_SPACE_TYPE SpaceId,
225 ACPI_ADR_SPACE_HANDLER Handler)
227 ACPI_OPERAND_OBJECT *ObjDesc;
228 ACPI_OPERAND_OBJECT *HandlerObj;
229 ACPI_OPERAND_OBJECT *RegionObj;
230 ACPI_OPERAND_OBJECT **LastObjPtr;
231 ACPI_NAMESPACE_NODE *Node;
235 ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler);
238 /* Parameter validation */
242 return_ACPI_STATUS (AE_BAD_PARAMETER);
245 Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
246 if (ACPI_FAILURE (Status))
248 return_ACPI_STATUS (Status);
251 /* Convert and validate the device handle */
253 Node = AcpiNsValidateHandle (Device);
255 ((Node->Type != ACPI_TYPE_DEVICE) &&
256 (Node->Type != ACPI_TYPE_PROCESSOR) &&
257 (Node->Type != ACPI_TYPE_THERMAL) &&
258 (Node != AcpiGbl_RootNode)))
260 Status = AE_BAD_PARAMETER;
264 /* Make sure the internal object exists */
266 ObjDesc = AcpiNsGetAttachedObject (Node);
269 Status = AE_NOT_EXIST;
273 /* Find the address handler the user requested */
275 HandlerObj = ObjDesc->Device.Handler;
276 LastObjPtr = &ObjDesc->Device.Handler;
279 /* We have a handler, see if user requested this one */
281 if (HandlerObj->AddressSpace.SpaceId == SpaceId)
283 /* Handler must be the same as the installed handler */
285 if (HandlerObj->AddressSpace.Handler != Handler)
287 Status = AE_BAD_PARAMETER;
291 /* Matched SpaceId, first dereference this in the Regions */
293 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
294 "Removing address handler %p(%p) for region %s "
295 "on Device %p(%p)\n",
296 HandlerObj, Handler, AcpiUtGetRegionName (SpaceId),
299 RegionObj = HandlerObj->AddressSpace.RegionList;
301 /* Walk the handler's region list */
306 * First disassociate the handler from the region.
308 * NOTE: this doesn't mean that the region goes away
309 * The region is just inaccessible as indicated to
312 AcpiEvDetachRegion (RegionObj, TRUE);
315 * Walk the list: Just grab the head because the
316 * DetachRegion removed the previous head.
318 RegionObj = HandlerObj->AddressSpace.RegionList;
322 /* Remove this Handler object from the list */
324 *LastObjPtr = HandlerObj->AddressSpace.Next;
326 /* Now we can delete the handler object */
328 AcpiUtRemoveReference (HandlerObj);
332 /* Walk the linked list of handlers */
334 LastObjPtr = &HandlerObj->AddressSpace.Next;
335 HandlerObj = HandlerObj->AddressSpace.Next;
338 /* The handler does not exist */
340 ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
341 "Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
342 Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc));
344 Status = AE_NOT_EXIST;
347 (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
348 return_ACPI_STATUS (Status);
351 ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler)