126f3cdf0SGordon Ross /******************************************************************************
226f3cdf0SGordon Ross *
326f3cdf0SGordon Ross * Module Name: evgpeinit - System GPE initialization and update
426f3cdf0SGordon Ross *
526f3cdf0SGordon Ross *****************************************************************************/
626f3cdf0SGordon Ross
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.
1226f3cdf0SGordon Ross * All rights reserved.
1326f3cdf0SGordon Ross *
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 *
11926f3cdf0SGordon Ross * Redistribution and use in source and binary forms, with or without
12026f3cdf0SGordon Ross * modification, are permitted provided that the following conditions
12126f3cdf0SGordon Ross * are met:
12226f3cdf0SGordon Ross * 1. Redistributions of source code must retain the above copyright
12326f3cdf0SGordon Ross * notice, this list of conditions, and the following disclaimer,
12426f3cdf0SGordon Ross * without modification.
12526f3cdf0SGordon Ross * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12626f3cdf0SGordon Ross * substantially similar to the "NO WARRANTY" disclaimer below
12726f3cdf0SGordon Ross * ("Disclaimer") and any redistribution must be conditioned upon
12826f3cdf0SGordon Ross * including a substantially similar Disclaimer requirement for further
12926f3cdf0SGordon Ross * binary redistribution.
13026f3cdf0SGordon Ross * 3. Neither the names of the above-listed copyright holders nor the names
13126f3cdf0SGordon Ross * of any contributors may be used to endorse or promote products derived
13226f3cdf0SGordon Ross * from this software without specific prior written permission.
13326f3cdf0SGordon Ross *
13426f3cdf0SGordon Ross * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
13526f3cdf0SGordon Ross * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136*35786f68SRobert Mustacchi * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
13726f3cdf0SGordon Ross * 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 *****************************************************************************/
15126f3cdf0SGordon Ross
15226f3cdf0SGordon Ross #include "acpi.h"
15326f3cdf0SGordon Ross #include "accommon.h"
15426f3cdf0SGordon Ross #include "acevents.h"
15526f3cdf0SGordon Ross #include "acnamesp.h"
15626f3cdf0SGordon Ross
15726f3cdf0SGordon Ross #define _COMPONENT ACPI_EVENTS
15826f3cdf0SGordon Ross ACPI_MODULE_NAME ("evgpeinit")
15926f3cdf0SGordon Ross
1607b1019a6SJerry Jelinek #if (!ACPI_REDUCED_HARDWARE) /* Entire module */
16126f3cdf0SGordon Ross
16226f3cdf0SGordon Ross /*
16326f3cdf0SGordon Ross * Note: History of _PRW support in ACPICA
16426f3cdf0SGordon Ross *
16526f3cdf0SGordon Ross * Originally (2000 - 2010), the GPE initialization code performed a walk of
16626f3cdf0SGordon Ross * the entire namespace to execute the _PRW methods and detect all GPEs
16726f3cdf0SGordon Ross * capable of waking the system.
16826f3cdf0SGordon Ross *
16926f3cdf0SGordon Ross * As of 10/2010, the _PRW method execution has been removed since it is
17026f3cdf0SGordon Ross * actually unnecessary. The host OS must in fact execute all _PRW methods
17126f3cdf0SGordon Ross * in order to identify the device/power-resource dependencies. We now put
17226f3cdf0SGordon Ross * the onus on the host OS to identify the wake GPEs as part of this process
17326f3cdf0SGordon Ross * and to inform ACPICA of these GPEs via the AcpiSetupGpeForWake interface. This
17426f3cdf0SGordon Ross * not only reduces the complexity of the ACPICA initialization code, but in
17526f3cdf0SGordon Ross * some cases (on systems with very large namespaces) it should reduce the
17626f3cdf0SGordon Ross * kernel boot time as well.
17726f3cdf0SGordon Ross */
17826f3cdf0SGordon Ross
17926f3cdf0SGordon Ross /*******************************************************************************
18026f3cdf0SGordon Ross *
18126f3cdf0SGordon Ross * FUNCTION: AcpiEvGpeInitialize
18226f3cdf0SGordon Ross *
18326f3cdf0SGordon Ross * PARAMETERS: None
18426f3cdf0SGordon Ross *
18526f3cdf0SGordon Ross * RETURN: Status
18626f3cdf0SGordon Ross *
18726f3cdf0SGordon Ross * DESCRIPTION: Initialize the GPE data structures and the FADT GPE 0/1 blocks
18826f3cdf0SGordon Ross *
18926f3cdf0SGordon Ross ******************************************************************************/
19026f3cdf0SGordon Ross
19126f3cdf0SGordon Ross ACPI_STATUS
AcpiEvGpeInitialize(void)19226f3cdf0SGordon Ross AcpiEvGpeInitialize (
19326f3cdf0SGordon Ross void)
19426f3cdf0SGordon Ross {
19526f3cdf0SGordon Ross UINT32 RegisterCount0 = 0;
19626f3cdf0SGordon Ross UINT32 RegisterCount1 = 0;
19726f3cdf0SGordon Ross UINT32 GpeNumberMax = 0;
19826f3cdf0SGordon Ross ACPI_STATUS Status;
19926f3cdf0SGordon Ross
20026f3cdf0SGordon Ross
20126f3cdf0SGordon Ross ACPI_FUNCTION_TRACE (EvGpeInitialize);
20226f3cdf0SGordon Ross
20326f3cdf0SGordon Ross
2047b1019a6SJerry Jelinek ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
2057b1019a6SJerry Jelinek "Initializing General Purpose Events (GPEs):\n"));
2067b1019a6SJerry Jelinek
20726f3cdf0SGordon Ross Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
20826f3cdf0SGordon Ross if (ACPI_FAILURE (Status))
20926f3cdf0SGordon Ross {
21026f3cdf0SGordon Ross return_ACPI_STATUS (Status);
21126f3cdf0SGordon Ross }
21226f3cdf0SGordon Ross
21326f3cdf0SGordon Ross /*
21426f3cdf0SGordon Ross * Initialize the GPE Block(s) defined in the FADT
21526f3cdf0SGordon Ross *
21626f3cdf0SGordon Ross * Why the GPE register block lengths are divided by 2: From the ACPI
21726f3cdf0SGordon Ross * Spec, section "General-Purpose Event Registers", we have:
21826f3cdf0SGordon Ross *
21926f3cdf0SGordon Ross * "Each register block contains two registers of equal length
22026f3cdf0SGordon Ross * GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
22126f3cdf0SGordon Ross * GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
22226f3cdf0SGordon Ross * The length of the GPE1_STS and GPE1_EN registers is equal to
22326f3cdf0SGordon Ross * half the GPE1_LEN. If a generic register block is not supported
22426f3cdf0SGordon Ross * then its respective block pointer and block length values in the
22526f3cdf0SGordon Ross * FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
22626f3cdf0SGordon Ross * to be the same size."
22726f3cdf0SGordon Ross */
22826f3cdf0SGordon Ross
22926f3cdf0SGordon Ross /*
23026f3cdf0SGordon Ross * Determine the maximum GPE number for this machine.
23126f3cdf0SGordon Ross *
23226f3cdf0SGordon Ross * Note: both GPE0 and GPE1 are optional, and either can exist without
23326f3cdf0SGordon Ross * the other.
23426f3cdf0SGordon Ross *
23526f3cdf0SGordon Ross * If EITHER the register length OR the block address are zero, then that
23626f3cdf0SGordon Ross * particular block is not supported.
23726f3cdf0SGordon Ross */
23826f3cdf0SGordon Ross if (AcpiGbl_FADT.Gpe0BlockLength &&
23926f3cdf0SGordon Ross AcpiGbl_FADT.XGpe0Block.Address)
24026f3cdf0SGordon Ross {
24126f3cdf0SGordon Ross /* GPE block 0 exists (has both length and address > 0) */
24226f3cdf0SGordon Ross
24326f3cdf0SGordon Ross RegisterCount0 = (UINT16) (AcpiGbl_FADT.Gpe0BlockLength / 2);
24426f3cdf0SGordon Ross GpeNumberMax = (RegisterCount0 * ACPI_GPE_REGISTER_WIDTH) - 1;
24526f3cdf0SGordon Ross
24626f3cdf0SGordon Ross /* Install GPE Block 0 */
24726f3cdf0SGordon Ross
24826f3cdf0SGordon Ross Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
2497b1019a6SJerry Jelinek AcpiGbl_FADT.XGpe0Block.Address,
2507b1019a6SJerry Jelinek AcpiGbl_FADT.XGpe0Block.SpaceId,
2517b1019a6SJerry Jelinek RegisterCount0, 0,
2527b1019a6SJerry Jelinek AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[0]);
25326f3cdf0SGordon Ross
25426f3cdf0SGordon Ross if (ACPI_FAILURE (Status))
25526f3cdf0SGordon Ross {
25626f3cdf0SGordon Ross ACPI_EXCEPTION ((AE_INFO, Status,
25726f3cdf0SGordon Ross "Could not create GPE Block 0"));
25826f3cdf0SGordon Ross }
25926f3cdf0SGordon Ross }
26026f3cdf0SGordon Ross
26126f3cdf0SGordon Ross if (AcpiGbl_FADT.Gpe1BlockLength &&
26226f3cdf0SGordon Ross AcpiGbl_FADT.XGpe1Block.Address)
26326f3cdf0SGordon Ross {
26426f3cdf0SGordon Ross /* GPE block 1 exists (has both length and address > 0) */
26526f3cdf0SGordon Ross
26626f3cdf0SGordon Ross RegisterCount1 = (UINT16) (AcpiGbl_FADT.Gpe1BlockLength / 2);
26726f3cdf0SGordon Ross
26826f3cdf0SGordon Ross /* Check for GPE0/GPE1 overlap (if both banks exist) */
26926f3cdf0SGordon Ross
27026f3cdf0SGordon Ross if ((RegisterCount0) &&
27126f3cdf0SGordon Ross (GpeNumberMax >= AcpiGbl_FADT.Gpe1Base))
27226f3cdf0SGordon Ross {
27326f3cdf0SGordon Ross ACPI_ERROR ((AE_INFO,
27426f3cdf0SGordon Ross "GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
27526f3cdf0SGordon Ross "(GPE %u to %u) - Ignoring GPE1",
27626f3cdf0SGordon Ross GpeNumberMax, AcpiGbl_FADT.Gpe1Base,
27726f3cdf0SGordon Ross AcpiGbl_FADT.Gpe1Base +
27826f3cdf0SGordon Ross ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1)));
27926f3cdf0SGordon Ross
28026f3cdf0SGordon Ross /* Ignore GPE1 block by setting the register count to zero */
28126f3cdf0SGordon Ross
28226f3cdf0SGordon Ross RegisterCount1 = 0;
28326f3cdf0SGordon Ross }
28426f3cdf0SGordon Ross else
28526f3cdf0SGordon Ross {
28626f3cdf0SGordon Ross /* Install GPE Block 1 */
28726f3cdf0SGordon Ross
28826f3cdf0SGordon Ross Status = AcpiEvCreateGpeBlock (AcpiGbl_FadtGpeDevice,
2897b1019a6SJerry Jelinek AcpiGbl_FADT.XGpe1Block.Address,
2907b1019a6SJerry Jelinek AcpiGbl_FADT.XGpe1Block.SpaceId,
2917b1019a6SJerry Jelinek RegisterCount1,
2927b1019a6SJerry Jelinek AcpiGbl_FADT.Gpe1Base,
2937b1019a6SJerry Jelinek AcpiGbl_FADT.SciInterrupt, &AcpiGbl_GpeFadtBlocks[1]);
29426f3cdf0SGordon Ross
29526f3cdf0SGordon Ross if (ACPI_FAILURE (Status))
29626f3cdf0SGordon Ross {
29726f3cdf0SGordon Ross ACPI_EXCEPTION ((AE_INFO, Status,
29826f3cdf0SGordon Ross "Could not create GPE Block 1"));
29926f3cdf0SGordon Ross }
30026f3cdf0SGordon Ross
30126f3cdf0SGordon Ross /*
30226f3cdf0SGordon Ross * GPE0 and GPE1 do not have to be contiguous in the GPE number
30326f3cdf0SGordon Ross * space. However, GPE0 always starts at GPE number zero.
30426f3cdf0SGordon Ross */
30526f3cdf0SGordon Ross GpeNumberMax = AcpiGbl_FADT.Gpe1Base +
3067b1019a6SJerry Jelinek ((RegisterCount1 * ACPI_GPE_REGISTER_WIDTH) - 1);
30726f3cdf0SGordon Ross }
30826f3cdf0SGordon Ross }
30926f3cdf0SGordon Ross
31026f3cdf0SGordon Ross /* Exit if there are no GPE registers */
31126f3cdf0SGordon Ross
31226f3cdf0SGordon Ross if ((RegisterCount0 + RegisterCount1) == 0)
31326f3cdf0SGordon Ross {
31426f3cdf0SGordon Ross /* GPEs are not required by ACPI, this is OK */
31526f3cdf0SGordon Ross
31626f3cdf0SGordon Ross ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
31726f3cdf0SGordon Ross "There are no GPE blocks defined in the FADT\n"));
31826f3cdf0SGordon Ross Status = AE_OK;
31926f3cdf0SGordon Ross goto Cleanup;
32026f3cdf0SGordon Ross }
32126f3cdf0SGordon Ross
32226f3cdf0SGordon Ross
32326f3cdf0SGordon Ross Cleanup:
32426f3cdf0SGordon Ross (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
32526f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
32626f3cdf0SGordon Ross }
32726f3cdf0SGordon Ross
32826f3cdf0SGordon Ross
32926f3cdf0SGordon Ross /*******************************************************************************
33026f3cdf0SGordon Ross *
33126f3cdf0SGordon Ross * FUNCTION: AcpiEvUpdateGpes
33226f3cdf0SGordon Ross *
33326f3cdf0SGordon Ross * PARAMETERS: TableOwnerId - ID of the newly-loaded ACPI table
33426f3cdf0SGordon Ross *
33526f3cdf0SGordon Ross * RETURN: None
33626f3cdf0SGordon Ross *
33726f3cdf0SGordon Ross * DESCRIPTION: Check for new GPE methods (_Lxx/_Exx) made available as a
33826f3cdf0SGordon Ross * result of a Load() or LoadTable() operation. If new GPE
33926f3cdf0SGordon Ross * methods have been installed, register the new methods.
34026f3cdf0SGordon Ross *
34126f3cdf0SGordon Ross ******************************************************************************/
34226f3cdf0SGordon Ross
34326f3cdf0SGordon Ross void
AcpiEvUpdateGpes(ACPI_OWNER_ID TableOwnerId)34426f3cdf0SGordon Ross AcpiEvUpdateGpes (
34526f3cdf0SGordon Ross ACPI_OWNER_ID TableOwnerId)
34626f3cdf0SGordon Ross {
34726f3cdf0SGordon Ross ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
34826f3cdf0SGordon Ross ACPI_GPE_BLOCK_INFO *GpeBlock;
34926f3cdf0SGordon Ross ACPI_GPE_WALK_INFO WalkInfo;
35026f3cdf0SGordon Ross ACPI_STATUS Status = AE_OK;
35126f3cdf0SGordon Ross
35226f3cdf0SGordon Ross
35326f3cdf0SGordon Ross /*
35426f3cdf0SGordon Ross * Find any _Lxx/_Exx GPE methods that have just been loaded.
35526f3cdf0SGordon Ross *
35626f3cdf0SGordon Ross * Any GPEs that correspond to new _Lxx/_Exx methods are immediately
35726f3cdf0SGordon Ross * enabled.
35826f3cdf0SGordon Ross *
35926f3cdf0SGordon Ross * Examine the namespace underneath each GpeDevice within the
36026f3cdf0SGordon Ross * GpeBlock lists.
36126f3cdf0SGordon Ross */
36226f3cdf0SGordon Ross Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
36326f3cdf0SGordon Ross if (ACPI_FAILURE (Status))
36426f3cdf0SGordon Ross {
36526f3cdf0SGordon Ross return;
36626f3cdf0SGordon Ross }
36726f3cdf0SGordon Ross
36826f3cdf0SGordon Ross WalkInfo.Count = 0;
36926f3cdf0SGordon Ross WalkInfo.OwnerId = TableOwnerId;
37026f3cdf0SGordon Ross WalkInfo.ExecuteByOwnerId = TRUE;
37126f3cdf0SGordon Ross
37226f3cdf0SGordon Ross /* Walk the interrupt level descriptor list */
37326f3cdf0SGordon Ross
37426f3cdf0SGordon Ross GpeXruptInfo = AcpiGbl_GpeXruptListHead;
37526f3cdf0SGordon Ross while (GpeXruptInfo)
37626f3cdf0SGordon Ross {
37726f3cdf0SGordon Ross /* Walk all Gpe Blocks attached to this interrupt level */
37826f3cdf0SGordon Ross
37926f3cdf0SGordon Ross GpeBlock = GpeXruptInfo->GpeBlockListHead;
38026f3cdf0SGordon Ross while (GpeBlock)
38126f3cdf0SGordon Ross {
38226f3cdf0SGordon Ross WalkInfo.GpeBlock = GpeBlock;
38326f3cdf0SGordon Ross WalkInfo.GpeDevice = GpeBlock->Node;
38426f3cdf0SGordon Ross
38526f3cdf0SGordon Ross Status = AcpiNsWalkNamespace (ACPI_TYPE_METHOD,
3867b1019a6SJerry Jelinek WalkInfo.GpeDevice, ACPI_UINT32_MAX,
3877b1019a6SJerry Jelinek ACPI_NS_WALK_NO_UNLOCK, AcpiEvMatchGpeMethod,
3887b1019a6SJerry Jelinek NULL, &WalkInfo, NULL);
38926f3cdf0SGordon Ross if (ACPI_FAILURE (Status))
39026f3cdf0SGordon Ross {
39126f3cdf0SGordon Ross ACPI_EXCEPTION ((AE_INFO, Status,
39226f3cdf0SGordon Ross "While decoding _Lxx/_Exx methods"));
39326f3cdf0SGordon Ross }
39426f3cdf0SGordon Ross
39526f3cdf0SGordon Ross GpeBlock = GpeBlock->Next;
39626f3cdf0SGordon Ross }
39726f3cdf0SGordon Ross
39826f3cdf0SGordon Ross GpeXruptInfo = GpeXruptInfo->Next;
39926f3cdf0SGordon Ross }
40026f3cdf0SGordon Ross
40126f3cdf0SGordon Ross if (WalkInfo.Count)
40226f3cdf0SGordon Ross {
4037b1019a6SJerry Jelinek ACPI_INFO (("Enabled %u new GPEs", WalkInfo.Count));
40426f3cdf0SGordon Ross }
40526f3cdf0SGordon Ross
40626f3cdf0SGordon Ross (void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
40726f3cdf0SGordon Ross return;
40826f3cdf0SGordon Ross }
40926f3cdf0SGordon Ross
41026f3cdf0SGordon Ross
41126f3cdf0SGordon Ross /*******************************************************************************
41226f3cdf0SGordon Ross *
41326f3cdf0SGordon Ross * FUNCTION: AcpiEvMatchGpeMethod
41426f3cdf0SGordon Ross *
41526f3cdf0SGordon Ross * PARAMETERS: Callback from WalkNamespace
41626f3cdf0SGordon Ross *
41726f3cdf0SGordon Ross * RETURN: Status
41826f3cdf0SGordon Ross *
41926f3cdf0SGordon Ross * DESCRIPTION: Called from AcpiWalkNamespace. Expects each object to be a
42026f3cdf0SGordon Ross * control method under the _GPE portion of the namespace.
42126f3cdf0SGordon Ross * Extract the name and GPE type from the object, saving this
42226f3cdf0SGordon Ross * information for quick lookup during GPE dispatch. Allows a
42326f3cdf0SGordon Ross * per-OwnerId evaluation if ExecuteByOwnerId is TRUE in the
42426f3cdf0SGordon Ross * WalkInfo parameter block.
42526f3cdf0SGordon Ross *
42626f3cdf0SGordon Ross * The name of each GPE control method is of the form:
42726f3cdf0SGordon Ross * "_Lxx" or "_Exx", where:
42826f3cdf0SGordon Ross * L - means that the GPE is level triggered
42926f3cdf0SGordon Ross * E - means that the GPE is edge triggered
43026f3cdf0SGordon Ross * xx - is the GPE number [in HEX]
43126f3cdf0SGordon Ross *
43226f3cdf0SGordon Ross * If WalkInfo->ExecuteByOwnerId is TRUE, we only execute examine GPE methods
43326f3cdf0SGordon Ross * with that owner.
43426f3cdf0SGordon Ross *
43526f3cdf0SGordon Ross ******************************************************************************/
43626f3cdf0SGordon Ross
43726f3cdf0SGordon Ross ACPI_STATUS
AcpiEvMatchGpeMethod(ACPI_HANDLE ObjHandle,UINT32 Level,void * Context,void ** ReturnValue)43826f3cdf0SGordon Ross AcpiEvMatchGpeMethod (
43926f3cdf0SGordon Ross ACPI_HANDLE ObjHandle,
44026f3cdf0SGordon Ross UINT32 Level,
44126f3cdf0SGordon Ross void *Context,
44226f3cdf0SGordon Ross void **ReturnValue)
44326f3cdf0SGordon Ross {
44426f3cdf0SGordon Ross ACPI_NAMESPACE_NODE *MethodNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle);
44526f3cdf0SGordon Ross ACPI_GPE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_GPE_WALK_INFO, Context);
44626f3cdf0SGordon Ross ACPI_GPE_EVENT_INFO *GpeEventInfo;
447*35786f68SRobert Mustacchi ACPI_STATUS Status;
44826f3cdf0SGordon Ross UINT32 GpeNumber;
449*35786f68SRobert Mustacchi UINT8 TempGpeNumber;
45026f3cdf0SGordon Ross char Name[ACPI_NAME_SIZE + 1];
45126f3cdf0SGordon Ross UINT8 Type;
45226f3cdf0SGordon Ross
45326f3cdf0SGordon Ross
45426f3cdf0SGordon Ross ACPI_FUNCTION_TRACE (EvMatchGpeMethod);
45526f3cdf0SGordon Ross
45626f3cdf0SGordon Ross
45726f3cdf0SGordon Ross /* Check if requested OwnerId matches this OwnerId */
45826f3cdf0SGordon Ross
45926f3cdf0SGordon Ross if ((WalkInfo->ExecuteByOwnerId) &&
46026f3cdf0SGordon Ross (MethodNode->OwnerId != WalkInfo->OwnerId))
46126f3cdf0SGordon Ross {
46226f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
46326f3cdf0SGordon Ross }
46426f3cdf0SGordon Ross
46526f3cdf0SGordon Ross /*
46626f3cdf0SGordon Ross * Match and decode the _Lxx and _Exx GPE method names
46726f3cdf0SGordon Ross *
46826f3cdf0SGordon Ross * 1) Extract the method name and null terminate it
46926f3cdf0SGordon Ross */
47026f3cdf0SGordon Ross ACPI_MOVE_32_TO_32 (Name, &MethodNode->Name.Integer);
47126f3cdf0SGordon Ross Name[ACPI_NAME_SIZE] = 0;
47226f3cdf0SGordon Ross
47326f3cdf0SGordon Ross /* 2) Name must begin with an underscore */
47426f3cdf0SGordon Ross
47526f3cdf0SGordon Ross if (Name[0] != '_')
47626f3cdf0SGordon Ross {
47726f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK); /* Ignore this method */
47826f3cdf0SGordon Ross }
47926f3cdf0SGordon Ross
48026f3cdf0SGordon Ross /*
48126f3cdf0SGordon Ross * 3) Edge/Level determination is based on the 2nd character
48226f3cdf0SGordon Ross * of the method name
48326f3cdf0SGordon Ross */
48426f3cdf0SGordon Ross switch (Name[1])
48526f3cdf0SGordon Ross {
48626f3cdf0SGordon Ross case 'L':
4877b1019a6SJerry Jelinek
48826f3cdf0SGordon Ross Type = ACPI_GPE_LEVEL_TRIGGERED;
48926f3cdf0SGordon Ross break;
49026f3cdf0SGordon Ross
49126f3cdf0SGordon Ross case 'E':
4927b1019a6SJerry Jelinek
49326f3cdf0SGordon Ross Type = ACPI_GPE_EDGE_TRIGGERED;
49426f3cdf0SGordon Ross break;
49526f3cdf0SGordon Ross
49626f3cdf0SGordon Ross default:
4977b1019a6SJerry Jelinek
49826f3cdf0SGordon Ross /* Unknown method type, just ignore it */
49926f3cdf0SGordon Ross
50026f3cdf0SGordon Ross ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
50126f3cdf0SGordon Ross "Ignoring unknown GPE method type: %s "
50226f3cdf0SGordon Ross "(name not of form _Lxx or _Exx)", Name));
50326f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
50426f3cdf0SGordon Ross }
50526f3cdf0SGordon Ross
50626f3cdf0SGordon Ross /* 4) The last two characters of the name are the hex GPE Number */
50726f3cdf0SGordon Ross
508*35786f68SRobert Mustacchi Status = AcpiUtAsciiToHexByte (&Name[2], &TempGpeNumber);
509*35786f68SRobert Mustacchi if (ACPI_FAILURE (Status))
51026f3cdf0SGordon Ross {
51126f3cdf0SGordon Ross /* Conversion failed; invalid method, just ignore it */
51226f3cdf0SGordon Ross
51326f3cdf0SGordon Ross ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
51426f3cdf0SGordon Ross "Could not extract GPE number from name: %s "
51526f3cdf0SGordon Ross "(name is not of form _Lxx or _Exx)", Name));
51626f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
51726f3cdf0SGordon Ross }
51826f3cdf0SGordon Ross
51926f3cdf0SGordon Ross /* Ensure that we have a valid GPE number for this GPE block */
52026f3cdf0SGordon Ross
521*35786f68SRobert Mustacchi GpeNumber = (UINT32) TempGpeNumber;
52226f3cdf0SGordon Ross GpeEventInfo = AcpiEvLowGetGpeInfo (GpeNumber, WalkInfo->GpeBlock);
52326f3cdf0SGordon Ross if (!GpeEventInfo)
52426f3cdf0SGordon Ross {
52526f3cdf0SGordon Ross /*
52626f3cdf0SGordon Ross * This GpeNumber is not valid for this GPE block, just ignore it.
52726f3cdf0SGordon Ross * However, it may be valid for a different GPE block, since GPE0
52826f3cdf0SGordon Ross * and GPE1 methods both appear under \_GPE.
52926f3cdf0SGordon Ross */
53026f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
53126f3cdf0SGordon Ross }
53226f3cdf0SGordon Ross
5337b1019a6SJerry Jelinek if ((ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
5347b1019a6SJerry Jelinek ACPI_GPE_DISPATCH_HANDLER) ||
5357b1019a6SJerry Jelinek (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
5367b1019a6SJerry Jelinek ACPI_GPE_DISPATCH_RAW_HANDLER))
53726f3cdf0SGordon Ross {
53826f3cdf0SGordon Ross /* If there is already a handler, ignore this GPE method */
53926f3cdf0SGordon Ross
54026f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
54126f3cdf0SGordon Ross }
54226f3cdf0SGordon Ross
5437b1019a6SJerry Jelinek if (ACPI_GPE_DISPATCH_TYPE (GpeEventInfo->Flags) ==
5447b1019a6SJerry Jelinek ACPI_GPE_DISPATCH_METHOD)
54526f3cdf0SGordon Ross {
54626f3cdf0SGordon Ross /*
54726f3cdf0SGordon Ross * If there is already a method, ignore this method. But check
54826f3cdf0SGordon Ross * for a type mismatch (if both the _Lxx AND _Exx exist)
54926f3cdf0SGordon Ross */
55026f3cdf0SGordon Ross if (Type != (GpeEventInfo->Flags & ACPI_GPE_XRUPT_TYPE_MASK))
55126f3cdf0SGordon Ross {
55226f3cdf0SGordon Ross ACPI_ERROR ((AE_INFO,
55326f3cdf0SGordon Ross "For GPE 0x%.2X, found both _L%2.2X and _E%2.2X methods",
55426f3cdf0SGordon Ross GpeNumber, GpeNumber, GpeNumber));
55526f3cdf0SGordon Ross }
55626f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
55726f3cdf0SGordon Ross }
55826f3cdf0SGordon Ross
5597b1019a6SJerry Jelinek /* Disable the GPE in case it's been enabled already. */
5607b1019a6SJerry Jelinek
5617b1019a6SJerry Jelinek (void) AcpiHwLowSetGpe (GpeEventInfo, ACPI_GPE_DISABLE);
5627b1019a6SJerry Jelinek
56326f3cdf0SGordon Ross /*
56426f3cdf0SGordon Ross * Add the GPE information from above to the GpeEventInfo block for
56526f3cdf0SGordon Ross * use during dispatch of this GPE.
56626f3cdf0SGordon Ross */
56726f3cdf0SGordon Ross GpeEventInfo->Flags &= ~(ACPI_GPE_DISPATCH_MASK);
56826f3cdf0SGordon Ross GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_METHOD);
56926f3cdf0SGordon Ross GpeEventInfo->Dispatch.MethodNode = MethodNode;
57026f3cdf0SGordon Ross
57126f3cdf0SGordon Ross ACPI_DEBUG_PRINT ((ACPI_DB_LOAD,
57226f3cdf0SGordon Ross "Registered GPE method %s as GPE number 0x%.2X\n",
57326f3cdf0SGordon Ross Name, GpeNumber));
57426f3cdf0SGordon Ross return_ACPI_STATUS (AE_OK);
57526f3cdf0SGordon Ross }
5767b1019a6SJerry Jelinek
5777b1019a6SJerry Jelinek #endif /* !ACPI_REDUCED_HARDWARE */
578