17b1019a6SJerry Jelinek /*******************************************************************************
27b1019a6SJerry Jelinek *
37b1019a6SJerry Jelinek * Module Name: utownerid - Support for Table/Method Owner IDs
47b1019a6SJerry Jelinek *
57b1019a6SJerry Jelinek ******************************************************************************/
67b1019a6SJerry Jelinek
7*35786f68SRobert Mustacchi /******************************************************************************
8*35786f68SRobert Mustacchi *
9*35786f68SRobert Mustacchi * 1. Copyright Notice
10*35786f68SRobert Mustacchi *
11*35786f68SRobert Mustacchi * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
127b1019a6SJerry Jelinek * All rights reserved.
137b1019a6SJerry Jelinek *
14*35786f68SRobert Mustacchi * 2. License
15*35786f68SRobert Mustacchi *
16*35786f68SRobert Mustacchi * 2.1. This is your license from Intel Corp. under its intellectual property
17*35786f68SRobert Mustacchi * rights. You may have additional license terms from the party that provided
18*35786f68SRobert Mustacchi * you this software, covering your right to use that party's intellectual
19*35786f68SRobert Mustacchi * property rights.
20*35786f68SRobert Mustacchi *
21*35786f68SRobert Mustacchi * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22*35786f68SRobert Mustacchi * copy of the source code appearing in this file ("Covered Code") an
23*35786f68SRobert Mustacchi * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24*35786f68SRobert Mustacchi * base code distributed originally by Intel ("Original Intel Code") to copy,
25*35786f68SRobert Mustacchi * make derivatives, distribute, use and display any portion of the Covered
26*35786f68SRobert Mustacchi * Code in any form, with the right to sublicense such rights; and
27*35786f68SRobert Mustacchi *
28*35786f68SRobert Mustacchi * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29*35786f68SRobert Mustacchi * license (with the right to sublicense), under only those claims of Intel
30*35786f68SRobert Mustacchi * patents that are infringed by the Original Intel Code, to make, use, sell,
31*35786f68SRobert Mustacchi * offer to sell, and import the Covered Code and derivative works thereof
32*35786f68SRobert Mustacchi * solely to the minimum extent necessary to exercise the above copyright
33*35786f68SRobert Mustacchi * license, and in no event shall the patent license extend to any additions
34*35786f68SRobert Mustacchi * to or modifications of the Original Intel Code. No other license or right
35*35786f68SRobert Mustacchi * is granted directly or by implication, estoppel or otherwise;
36*35786f68SRobert Mustacchi *
37*35786f68SRobert Mustacchi * The above copyright and patent license is granted only if the following
38*35786f68SRobert Mustacchi * conditions are met:
39*35786f68SRobert Mustacchi *
40*35786f68SRobert Mustacchi * 3. Conditions
41*35786f68SRobert Mustacchi *
42*35786f68SRobert Mustacchi * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43*35786f68SRobert Mustacchi * Redistribution of source code of any substantial portion of the Covered
44*35786f68SRobert Mustacchi * Code or modification with rights to further distribute source must include
45*35786f68SRobert Mustacchi * the above Copyright Notice, the above License, this list of Conditions,
46*35786f68SRobert Mustacchi * and the following Disclaimer and Export Compliance provision. In addition,
47*35786f68SRobert Mustacchi * Licensee must cause all Covered Code to which Licensee contributes to
48*35786f68SRobert Mustacchi * contain a file documenting the changes Licensee made to create that Covered
49*35786f68SRobert Mustacchi * Code and the date of any change. Licensee must include in that file the
50*35786f68SRobert Mustacchi * documentation of any changes made by any predecessor Licensee. Licensee
51*35786f68SRobert Mustacchi * must include a prominent statement that the modification is derived,
52*35786f68SRobert Mustacchi * directly or indirectly, from Original Intel Code.
53*35786f68SRobert Mustacchi *
54*35786f68SRobert Mustacchi * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55*35786f68SRobert Mustacchi * Redistribution of source code of any substantial portion of the Covered
56*35786f68SRobert Mustacchi * Code or modification without rights to further distribute source must
57*35786f68SRobert Mustacchi * include the following Disclaimer and Export Compliance provision in the
58*35786f68SRobert Mustacchi * documentation and/or other materials provided with distribution. In
59*35786f68SRobert Mustacchi * addition, Licensee may not authorize further sublicense of source of any
60*35786f68SRobert Mustacchi * portion of the Covered Code, and must include terms to the effect that the
61*35786f68SRobert Mustacchi * license from Licensee to its licensee is limited to the intellectual
62*35786f68SRobert Mustacchi * property embodied in the software Licensee provides to its licensee, and
63*35786f68SRobert Mustacchi * not to intellectual property embodied in modifications its licensee may
64*35786f68SRobert Mustacchi * make.
65*35786f68SRobert Mustacchi *
66*35786f68SRobert Mustacchi * 3.3. Redistribution of Executable. Redistribution in executable form of any
67*35786f68SRobert Mustacchi * substantial portion of the Covered Code or modification must reproduce the
68*35786f68SRobert Mustacchi * above Copyright Notice, and the following Disclaimer and Export Compliance
69*35786f68SRobert Mustacchi * provision in the documentation and/or other materials provided with the
70*35786f68SRobert Mustacchi * distribution.
71*35786f68SRobert Mustacchi *
72*35786f68SRobert Mustacchi * 3.4. Intel retains all right, title, and interest in and to the Original
73*35786f68SRobert Mustacchi * Intel Code.
74*35786f68SRobert Mustacchi *
75*35786f68SRobert Mustacchi * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76*35786f68SRobert Mustacchi * Intel shall be used in advertising or otherwise to promote the sale, use or
77*35786f68SRobert Mustacchi * other dealings in products derived from or relating to the Covered Code
78*35786f68SRobert Mustacchi * without prior written authorization from Intel.
79*35786f68SRobert Mustacchi *
80*35786f68SRobert Mustacchi * 4. Disclaimer and Export Compliance
81*35786f68SRobert Mustacchi *
82*35786f68SRobert Mustacchi * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83*35786f68SRobert Mustacchi * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84*35786f68SRobert Mustacchi * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85*35786f68SRobert Mustacchi * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86*35786f68SRobert Mustacchi * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87*35786f68SRobert Mustacchi * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88*35786f68SRobert Mustacchi * PARTICULAR PURPOSE.
89*35786f68SRobert Mustacchi *
90*35786f68SRobert Mustacchi * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91*35786f68SRobert Mustacchi * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92*35786f68SRobert Mustacchi * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93*35786f68SRobert Mustacchi * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94*35786f68SRobert Mustacchi * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95*35786f68SRobert Mustacchi * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96*35786f68SRobert Mustacchi * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97*35786f68SRobert Mustacchi * LIMITED REMEDY.
98*35786f68SRobert Mustacchi *
99*35786f68SRobert Mustacchi * 4.3. Licensee shall not export, either directly or indirectly, any of this
100*35786f68SRobert Mustacchi * software or system incorporating such software without first obtaining any
101*35786f68SRobert Mustacchi * required license or other approval from the U. S. Department of Commerce or
102*35786f68SRobert Mustacchi * any other agency or department of the United States Government. In the
103*35786f68SRobert Mustacchi * event Licensee exports any such software from the United States or
104*35786f68SRobert Mustacchi * re-exports any such software from a foreign destination, Licensee shall
105*35786f68SRobert Mustacchi * ensure that the distribution and export/re-export of the software is in
106*35786f68SRobert Mustacchi * compliance with all laws, regulations, orders, or other restrictions of the
107*35786f68SRobert Mustacchi * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108*35786f68SRobert Mustacchi * any of its subsidiaries will export/re-export any technical data, process,
109*35786f68SRobert Mustacchi * software, or service, directly or indirectly, to any country for which the
110*35786f68SRobert Mustacchi * United States government or any agency thereof requires an export license,
111*35786f68SRobert Mustacchi * other governmental approval, or letter of assurance, without first obtaining
112*35786f68SRobert Mustacchi * such license, approval or letter.
113*35786f68SRobert Mustacchi *
114*35786f68SRobert Mustacchi *****************************************************************************
115*35786f68SRobert Mustacchi *
116*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
117*35786f68SRobert Mustacchi * following license:
118*35786f68SRobert Mustacchi *
1197b1019a6SJerry Jelinek * Redistribution and use in source and binary forms, with or without
1207b1019a6SJerry Jelinek * modification, are permitted provided that the following conditions
1217b1019a6SJerry Jelinek * are met:
1227b1019a6SJerry Jelinek * 1. Redistributions of source code must retain the above copyright
1237b1019a6SJerry Jelinek * notice, this list of conditions, and the following disclaimer,
1247b1019a6SJerry Jelinek * without modification.
1257b1019a6SJerry Jelinek * 2. Redistributions in binary form must reproduce at minimum a disclaimer
1267b1019a6SJerry Jelinek * substantially similar to the "NO WARRANTY" disclaimer below
1277b1019a6SJerry Jelinek * ("Disclaimer") and any redistribution must be conditioned upon
1287b1019a6SJerry Jelinek * including a substantially similar Disclaimer requirement for further
1297b1019a6SJerry Jelinek * binary redistribution.
1307b1019a6SJerry Jelinek * 3. Neither the names of the above-listed copyright holders nor the names
1317b1019a6SJerry Jelinek * of any contributors may be used to endorse or promote products derived
1327b1019a6SJerry Jelinek * from this software without specific prior written permission.
1337b1019a6SJerry Jelinek *
1347b1019a6SJerry Jelinek * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1357b1019a6SJerry Jelinek * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136*35786f68SRobert Mustacchi * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1377b1019a6SJerry Jelinek * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138*35786f68SRobert Mustacchi * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139*35786f68SRobert Mustacchi * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140*35786f68SRobert Mustacchi * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141*35786f68SRobert Mustacchi * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142*35786f68SRobert Mustacchi * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143*35786f68SRobert Mustacchi * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144*35786f68SRobert Mustacchi * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145*35786f68SRobert Mustacchi *
146*35786f68SRobert Mustacchi * Alternatively, you may choose to be licensed under the terms of the
147*35786f68SRobert Mustacchi * GNU General Public License ("GPL") version 2 as published by the Free
148*35786f68SRobert Mustacchi * Software Foundation.
149*35786f68SRobert Mustacchi *
150*35786f68SRobert Mustacchi *****************************************************************************/
1517b1019a6SJerry Jelinek
1527b1019a6SJerry Jelinek #include "acpi.h"
1537b1019a6SJerry Jelinek #include "accommon.h"
1547b1019a6SJerry Jelinek #include "acnamesp.h"
1557b1019a6SJerry Jelinek
1567b1019a6SJerry Jelinek
1577b1019a6SJerry Jelinek #define _COMPONENT ACPI_UTILITIES
1587b1019a6SJerry Jelinek ACPI_MODULE_NAME ("utownerid")
1597b1019a6SJerry Jelinek
1607b1019a6SJerry Jelinek
1617b1019a6SJerry Jelinek /*******************************************************************************
1627b1019a6SJerry Jelinek *
1637b1019a6SJerry Jelinek * FUNCTION: AcpiUtAllocateOwnerId
1647b1019a6SJerry Jelinek *
1657b1019a6SJerry Jelinek * PARAMETERS: OwnerId - Where the new owner ID is returned
1667b1019a6SJerry Jelinek *
1677b1019a6SJerry Jelinek * RETURN: Status
1687b1019a6SJerry Jelinek *
1697b1019a6SJerry Jelinek * DESCRIPTION: Allocate a table or method owner ID. The owner ID is used to
1707b1019a6SJerry Jelinek * track objects created by the table or method, to be deleted
1717b1019a6SJerry Jelinek * when the method exits or the table is unloaded.
1727b1019a6SJerry Jelinek *
1737b1019a6SJerry Jelinek ******************************************************************************/
1747b1019a6SJerry Jelinek
1757b1019a6SJerry Jelinek ACPI_STATUS
AcpiUtAllocateOwnerId(ACPI_OWNER_ID * OwnerId)1767b1019a6SJerry Jelinek AcpiUtAllocateOwnerId (
1777b1019a6SJerry Jelinek ACPI_OWNER_ID *OwnerId)
1787b1019a6SJerry Jelinek {
1797b1019a6SJerry Jelinek UINT32 i;
1807b1019a6SJerry Jelinek UINT32 j;
1817b1019a6SJerry Jelinek UINT32 k;
1827b1019a6SJerry Jelinek ACPI_STATUS Status;
1837b1019a6SJerry Jelinek
1847b1019a6SJerry Jelinek
1857b1019a6SJerry Jelinek ACPI_FUNCTION_TRACE (UtAllocateOwnerId);
1867b1019a6SJerry Jelinek
1877b1019a6SJerry Jelinek
1887b1019a6SJerry Jelinek /* Guard against multiple allocations of ID to the same location */
1897b1019a6SJerry Jelinek
1907b1019a6SJerry Jelinek if (*OwnerId)
1917b1019a6SJerry Jelinek {
1927b1019a6SJerry Jelinek ACPI_ERROR ((AE_INFO,
1937b1019a6SJerry Jelinek "Owner ID [0x%2.2X] already exists", *OwnerId));
1947b1019a6SJerry Jelinek return_ACPI_STATUS (AE_ALREADY_EXISTS);
1957b1019a6SJerry Jelinek }
1967b1019a6SJerry Jelinek
1977b1019a6SJerry Jelinek /* Mutex for the global ID mask */
1987b1019a6SJerry Jelinek
1997b1019a6SJerry Jelinek Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES);
2007b1019a6SJerry Jelinek if (ACPI_FAILURE (Status))
2017b1019a6SJerry Jelinek {
2027b1019a6SJerry Jelinek return_ACPI_STATUS (Status);
2037b1019a6SJerry Jelinek }
2047b1019a6SJerry Jelinek
2057b1019a6SJerry Jelinek /*
2067b1019a6SJerry Jelinek * Find a free owner ID, cycle through all possible IDs on repeated
2077b1019a6SJerry Jelinek * allocations. (ACPI_NUM_OWNERID_MASKS + 1) because first index
2087b1019a6SJerry Jelinek * may have to be scanned twice.
2097b1019a6SJerry Jelinek */
2107b1019a6SJerry Jelinek for (i = 0, j = AcpiGbl_LastOwnerIdIndex;
2117b1019a6SJerry Jelinek i < (ACPI_NUM_OWNERID_MASKS + 1);
2127b1019a6SJerry Jelinek i++, j++)
2137b1019a6SJerry Jelinek {
2147b1019a6SJerry Jelinek if (j >= ACPI_NUM_OWNERID_MASKS)
2157b1019a6SJerry Jelinek {
2167b1019a6SJerry Jelinek j = 0; /* Wraparound to start of mask array */
2177b1019a6SJerry Jelinek }
2187b1019a6SJerry Jelinek
2197b1019a6SJerry Jelinek for (k = AcpiGbl_NextOwnerIdOffset; k < 32; k++)
2207b1019a6SJerry Jelinek {
2217b1019a6SJerry Jelinek if (AcpiGbl_OwnerIdMask[j] == ACPI_UINT32_MAX)
2227b1019a6SJerry Jelinek {
2237b1019a6SJerry Jelinek /* There are no free IDs in this mask */
2247b1019a6SJerry Jelinek
2257b1019a6SJerry Jelinek break;
2267b1019a6SJerry Jelinek }
2277b1019a6SJerry Jelinek
228*35786f68SRobert Mustacchi /*
229*35786f68SRobert Mustacchi * Note: the UINT32 cast ensures that 1 is stored as a unsigned
230*35786f68SRobert Mustacchi * integer. Omitting the cast may result in 1 being stored as an
231*35786f68SRobert Mustacchi * int. Some compilers or runtime error detection may flag this as
232*35786f68SRobert Mustacchi * an error.
233*35786f68SRobert Mustacchi */
234*35786f68SRobert Mustacchi if (!(AcpiGbl_OwnerIdMask[j] & ((UINT32) 1 << k)))
2357b1019a6SJerry Jelinek {
2367b1019a6SJerry Jelinek /*
2377b1019a6SJerry Jelinek * Found a free ID. The actual ID is the bit index plus one,
2387b1019a6SJerry Jelinek * making zero an invalid Owner ID. Save this as the last ID
2397b1019a6SJerry Jelinek * allocated and update the global ID mask.
2407b1019a6SJerry Jelinek */
241*35786f68SRobert Mustacchi AcpiGbl_OwnerIdMask[j] |= ((UINT32) 1 << k);
2427b1019a6SJerry Jelinek
2437b1019a6SJerry Jelinek AcpiGbl_LastOwnerIdIndex = (UINT8) j;
2447b1019a6SJerry Jelinek AcpiGbl_NextOwnerIdOffset = (UINT8) (k + 1);
2457b1019a6SJerry Jelinek
2467b1019a6SJerry Jelinek /*
2477b1019a6SJerry Jelinek * Construct encoded ID from the index and bit position
2487b1019a6SJerry Jelinek *
2497b1019a6SJerry Jelinek * Note: Last [j].k (bit 255) is never used and is marked
2507b1019a6SJerry Jelinek * permanently allocated (prevents +1 overflow)
2517b1019a6SJerry Jelinek */
2527b1019a6SJerry Jelinek *OwnerId = (ACPI_OWNER_ID) ((k + 1) + ACPI_MUL_32 (j));
2537b1019a6SJerry Jelinek
2547b1019a6SJerry Jelinek ACPI_DEBUG_PRINT ((ACPI_DB_VALUES,
2557b1019a6SJerry Jelinek "Allocated OwnerId: %2.2X\n", (unsigned int) *OwnerId));
2567b1019a6SJerry Jelinek goto Exit;
2577b1019a6SJerry Jelinek }
2587b1019a6SJerry Jelinek }
2597b1019a6SJerry Jelinek
2607b1019a6SJerry Jelinek AcpiGbl_NextOwnerIdOffset = 0;
2617b1019a6SJerry Jelinek }
2627b1019a6SJerry Jelinek
2637b1019a6SJerry Jelinek /*
2647b1019a6SJerry Jelinek * All OwnerIds have been allocated. This typically should
2657b1019a6SJerry Jelinek * not happen since the IDs are reused after deallocation. The IDs are
2667b1019a6SJerry Jelinek * allocated upon table load (one per table) and method execution, and
2677b1019a6SJerry Jelinek * they are released when a table is unloaded or a method completes
2687b1019a6SJerry Jelinek * execution.
2697b1019a6SJerry Jelinek *
2707b1019a6SJerry Jelinek * If this error happens, there may be very deep nesting of invoked
2717b1019a6SJerry Jelinek * control methods, or there may be a bug where the IDs are not released.
2727b1019a6SJerry Jelinek */
2737b1019a6SJerry Jelinek Status = AE_OWNER_ID_LIMIT;
2747b1019a6SJerry Jelinek ACPI_ERROR ((AE_INFO,
2757b1019a6SJerry Jelinek "Could not allocate new OwnerId (255 max), AE_OWNER_ID_LIMIT"));
2767b1019a6SJerry Jelinek
2777b1019a6SJerry Jelinek Exit:
2787b1019a6SJerry Jelinek (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
2797b1019a6SJerry Jelinek return_ACPI_STATUS (Status);
2807b1019a6SJerry Jelinek }
2817b1019a6SJerry Jelinek
2827b1019a6SJerry Jelinek
2837b1019a6SJerry Jelinek /*******************************************************************************
2847b1019a6SJerry Jelinek *
2857b1019a6SJerry Jelinek * FUNCTION: AcpiUtReleaseOwnerId
2867b1019a6SJerry Jelinek *
2877b1019a6SJerry Jelinek * PARAMETERS: OwnerIdPtr - Pointer to a previously allocated OwnerID
2887b1019a6SJerry Jelinek *
2897b1019a6SJerry Jelinek * RETURN: None. No error is returned because we are either exiting a
2907b1019a6SJerry Jelinek * control method or unloading a table. Either way, we would
2917b1019a6SJerry Jelinek * ignore any error anyway.
2927b1019a6SJerry Jelinek *
2937b1019a6SJerry Jelinek * DESCRIPTION: Release a table or method owner ID. Valid IDs are 1 - 255
2947b1019a6SJerry Jelinek *
2957b1019a6SJerry Jelinek ******************************************************************************/
2967b1019a6SJerry Jelinek
2977b1019a6SJerry Jelinek void
AcpiUtReleaseOwnerId(ACPI_OWNER_ID * OwnerIdPtr)2987b1019a6SJerry Jelinek AcpiUtReleaseOwnerId (
2997b1019a6SJerry Jelinek ACPI_OWNER_ID *OwnerIdPtr)
3007b1019a6SJerry Jelinek {
3017b1019a6SJerry Jelinek ACPI_OWNER_ID OwnerId = *OwnerIdPtr;
3027b1019a6SJerry Jelinek ACPI_STATUS Status;
3037b1019a6SJerry Jelinek UINT32 Index;
3047b1019a6SJerry Jelinek UINT32 Bit;
3057b1019a6SJerry Jelinek
3067b1019a6SJerry Jelinek
3077b1019a6SJerry Jelinek ACPI_FUNCTION_TRACE_U32 (UtReleaseOwnerId, OwnerId);
3087b1019a6SJerry Jelinek
3097b1019a6SJerry Jelinek
3107b1019a6SJerry Jelinek /* Always clear the input OwnerId (zero is an invalid ID) */
3117b1019a6SJerry Jelinek
3127b1019a6SJerry Jelinek *OwnerIdPtr = 0;
3137b1019a6SJerry Jelinek
3147b1019a6SJerry Jelinek /* Zero is not a valid OwnerID */
3157b1019a6SJerry Jelinek
3167b1019a6SJerry Jelinek if (OwnerId == 0)
3177b1019a6SJerry Jelinek {
3187b1019a6SJerry Jelinek ACPI_ERROR ((AE_INFO, "Invalid OwnerId: 0x%2.2X", OwnerId));
3197b1019a6SJerry Jelinek return_VOID;
3207b1019a6SJerry Jelinek }
3217b1019a6SJerry Jelinek
3227b1019a6SJerry Jelinek /* Mutex for the global ID mask */
3237b1019a6SJerry Jelinek
3247b1019a6SJerry Jelinek Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES);
3257b1019a6SJerry Jelinek if (ACPI_FAILURE (Status))
3267b1019a6SJerry Jelinek {
3277b1019a6SJerry Jelinek return_VOID;
3287b1019a6SJerry Jelinek }
3297b1019a6SJerry Jelinek
3307b1019a6SJerry Jelinek /* Normalize the ID to zero */
3317b1019a6SJerry Jelinek
3327b1019a6SJerry Jelinek OwnerId--;
3337b1019a6SJerry Jelinek
3347b1019a6SJerry Jelinek /* Decode ID to index/offset pair */
3357b1019a6SJerry Jelinek
3367b1019a6SJerry Jelinek Index = ACPI_DIV_32 (OwnerId);
337*35786f68SRobert Mustacchi Bit = (UINT32) 1 << ACPI_MOD_32 (OwnerId);
3387b1019a6SJerry Jelinek
3397b1019a6SJerry Jelinek /* Free the owner ID only if it is valid */
3407b1019a6SJerry Jelinek
3417b1019a6SJerry Jelinek if (AcpiGbl_OwnerIdMask[Index] & Bit)
3427b1019a6SJerry Jelinek {
3437b1019a6SJerry Jelinek AcpiGbl_OwnerIdMask[Index] ^= Bit;
3447b1019a6SJerry Jelinek }
3457b1019a6SJerry Jelinek else
3467b1019a6SJerry Jelinek {
3477b1019a6SJerry Jelinek ACPI_ERROR ((AE_INFO,
3487b1019a6SJerry Jelinek "Release of non-allocated OwnerId: 0x%2.2X", OwnerId + 1));
3497b1019a6SJerry Jelinek }
3507b1019a6SJerry Jelinek
3517b1019a6SJerry Jelinek (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES);
3527b1019a6SJerry Jelinek return_VOID;
3537b1019a6SJerry Jelinek }
354