xref: /titanic_51/usr/src/uts/intel/io/acpica/events/evsci.c (revision 1fcced4c370617db71610fecffd5451a5894ca5e)
1 /*******************************************************************************
2  *
3  * Module Name: evsci - System Control Interrupt configuration and
4  *                      legacy to ACPI mode state transition functions
5  *
6  ******************************************************************************/
7 
8 /******************************************************************************
9  *
10  * 1. Copyright Notice
11  *
12  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
13  * All rights reserved.
14  *
15  * 2. License
16  *
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
20  * property rights.
21  *
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
28  *
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;
37  *
38  * The above copyright and patent license is granted only if the following
39  * conditions are met:
40  *
41  * 3. Conditions
42  *
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.
54  *
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
65 
66  * make.
67  *
68  * 3.3. Redistribution of Executable. Redistribution in executable form of any
69  * substantial portion of the Covered Code or modification must reproduce the
70  * above Copyright Notice, and the following Disclaimer and Export Compliance
71  * provision in the documentation and/or other materials provided with the
72  * distribution.
73  *
74  * 3.4. Intel retains all right, title, and interest in and to the Original
75  * Intel Code.
76  *
77  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
78  * Intel shall be used in advertising or otherwise to promote the sale, use or
79  * other dealings in products derived from or relating to the Covered Code
80  * without prior written authorization from Intel.
81  *
82  * 4. Disclaimer and Export Compliance
83  *
84  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
85  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
86  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
87  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
88  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
89  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
90  * PARTICULAR PURPOSE.
91  *
92  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
93  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
94  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
95  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
96  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
97  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
98  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
99  * LIMITED REMEDY.
100  *
101  * 4.3. Licensee shall not export, either directly or indirectly, any of this
102  * software or system incorporating such software without first obtaining any
103  * required license or other approval from the U. S. Department of Commerce or
104  * any other agency or department of the United States Government.  In the
105  * event Licensee exports any such software from the United States or
106  * re-exports any such software from a foreign destination, Licensee shall
107  * ensure that the distribution and export/re-export of the software is in
108  * compliance with all laws, regulations, orders, or other restrictions of the
109  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
110  * any of its subsidiaries will export/re-export any technical data, process,
111  * software, or service, directly or indirectly, to any country for which the
112  * United States government or any agency thereof requires an export license,
113  * other governmental approval, or letter of assurance, without first obtaining
114  * such license, approval or letter.
115  *
116  *****************************************************************************/
117 
118 #include "acpi.h"
119 #include "accommon.h"
120 #include "acevents.h"
121 
122 
123 #define _COMPONENT          ACPI_EVENTS
124         ACPI_MODULE_NAME    ("evsci")
125 
126 /* Local prototypes */
127 
128 static UINT32 ACPI_SYSTEM_XFACE
129 AcpiEvSciXruptHandler (
130     void                    *Context);
131 
132 
133 /*******************************************************************************
134  *
135  * FUNCTION:    AcpiEvSciXruptHandler
136  *
137  * PARAMETERS:  Context   - Calling Context
138  *
139  * RETURN:      Status code indicates whether interrupt was handled.
140  *
141  * DESCRIPTION: Interrupt handler that will figure out what function or
142  *              control method to call to deal with a SCI.
143  *
144  ******************************************************************************/
145 
146 static UINT32 ACPI_SYSTEM_XFACE
147 AcpiEvSciXruptHandler (
148     void                    *Context)
149 {
150     ACPI_GPE_XRUPT_INFO     *GpeXruptList = Context;
151     UINT32                  InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
152 
153 
154     ACPI_FUNCTION_TRACE (EvSciXruptHandler);
155 
156 
157     /*
158      * We are guaranteed by the ACPI CA initialization/shutdown code that
159      * if this interrupt handler is installed, ACPI is enabled.
160      */
161 
162     /*
163      * Fixed Events:
164      * Check for and dispatch any Fixed Events that have occurred
165      */
166     InterruptHandled |= AcpiEvFixedEventDetect ();
167 
168     /*
169      * General Purpose Events:
170      * Check for and dispatch any GPEs that have occurred
171      */
172     InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
173 
174     AcpiSciCount++;
175     return_UINT32 (InterruptHandled);
176 }
177 
178 
179 /*******************************************************************************
180  *
181  * FUNCTION:    AcpiEvGpeXruptHandler
182  *
183  * PARAMETERS:  Context   - Calling Context
184  *
185  * RETURN:      Status code indicates whether interrupt was handled.
186  *
187  * DESCRIPTION: Handler for GPE Block Device interrupts
188  *
189  ******************************************************************************/
190 
191 UINT32 ACPI_SYSTEM_XFACE
192 AcpiEvGpeXruptHandler (
193     void                    *Context)
194 {
195     ACPI_GPE_XRUPT_INFO     *GpeXruptList = Context;
196     UINT32                  InterruptHandled = ACPI_INTERRUPT_NOT_HANDLED;
197 
198 
199     ACPI_FUNCTION_TRACE (EvGpeXruptHandler);
200 
201 
202     /*
203      * We are guaranteed by the ACPI CA initialization/shutdown code that
204      * if this interrupt handler is installed, ACPI is enabled.
205      */
206 
207     /* GPEs: Check for and dispatch any GPEs that have occurred */
208 
209     InterruptHandled |= AcpiEvGpeDetect (GpeXruptList);
210 
211     return_UINT32 (InterruptHandled);
212 }
213 
214 
215 /******************************************************************************
216  *
217  * FUNCTION:    AcpiEvInstallSciHandler
218  *
219  * PARAMETERS:  none
220  *
221  * RETURN:      Status
222  *
223  * DESCRIPTION: Installs SCI handler.
224  *
225  ******************************************************************************/
226 
227 UINT32
228 AcpiEvInstallSciHandler (
229     void)
230 {
231     UINT32                  Status = AE_OK;
232 
233 
234     ACPI_FUNCTION_TRACE (EvInstallSciHandler);
235 
236 
237     Status = AcpiOsInstallInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
238                 AcpiEvSciXruptHandler, AcpiGbl_GpeXruptListHead);
239     return_ACPI_STATUS (Status);
240 }
241 
242 
243 /******************************************************************************
244  *
245  * FUNCTION:    AcpiEvRemoveSciHandler
246  *
247  * PARAMETERS:  none
248  *
249  * RETURN:      E_OK if handler uninstalled OK, E_ERROR if handler was not
250  *              installed to begin with
251  *
252  * DESCRIPTION: Remove the SCI interrupt handler. No further SCIs will be
253  *              taken.
254  *
255  * Note:  It doesn't seem important to disable all events or set the event
256  *        enable registers to their original values. The OS should disable
257  *        the SCI interrupt level when the handler is removed, so no more
258  *        events will come in.
259  *
260  ******************************************************************************/
261 
262 ACPI_STATUS
263 AcpiEvRemoveSciHandler (
264     void)
265 {
266     ACPI_STATUS             Status;
267 
268 
269     ACPI_FUNCTION_TRACE (EvRemoveSciHandler);
270 
271 
272     /* Just let the OS remove the handler and disable the level */
273 
274     Status = AcpiOsRemoveInterruptHandler ((UINT32) AcpiGbl_FADT.SciInterrupt,
275                 AcpiEvSciXruptHandler);
276 
277     return_ACPI_STATUS (Status);
278 }
279 
280 
281