1 | /* $NetBSD: OsdInterrupt.c,v 1.8 2009/08/18 16:41:02 jmcneill Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2001 Wasabi Systems, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * Written by Jason R. Thorpe for Wasabi Systems, Inc. |
8 | * |
9 | * Redistribution and use in source and binary forms, with or without |
10 | * modification, are permitted provided that the following conditions |
11 | * are met: |
12 | * 1. Redistributions of source code must retain the above copyright |
13 | * notice, this list of conditions and the following disclaimer. |
14 | * 2. Redistributions in binary form must reproduce the above copyright |
15 | * notice, this list of conditions and the following disclaimer in the |
16 | * documentation and/or other materials provided with the distribution. |
17 | * 3. All advertising materials mentioning features or use of this software |
18 | * must display the following acknowledgement: |
19 | * This product includes software developed for the NetBSD Project by |
20 | * Wasabi Systems, Inc. |
21 | * 4. The name of Wasabi Systems, Inc. may not be used to endorse |
22 | * or promote products derived from this software without specific prior |
23 | * written permission. |
24 | * |
25 | * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND |
26 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
27 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
28 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC |
29 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
30 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
31 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
32 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
33 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
34 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
35 | * POSSIBILITY OF SUCH DAMAGE. |
36 | */ |
37 | |
38 | /* |
39 | * OS Services Layer |
40 | * |
41 | * 6.5: Interrupt Handling |
42 | */ |
43 | |
44 | #include <sys/cdefs.h> |
45 | __KERNEL_RCSID(0, "$NetBSD: OsdInterrupt.c,v 1.8 2009/08/18 16:41:02 jmcneill Exp $" ); |
46 | |
47 | #include <sys/param.h> |
48 | #include <sys/malloc.h> |
49 | #include <sys/mutex.h> |
50 | #include <sys/queue.h> |
51 | |
52 | #include <dev/acpi/acpica.h> |
53 | |
54 | #include <machine/acpi_machdep.h> |
55 | |
56 | #define _COMPONENT ACPI_OS_SERVICES |
57 | ACPI_MODULE_NAME("INTERRUPT" ) |
58 | |
59 | MALLOC_DEFINE(M_ACPI, "acpi" , "Advanced Configuration and Power Interface" ); |
60 | |
61 | /* |
62 | * We're lucky -- ACPI uses the same convention for interrupt service |
63 | * routine return values at NetBSD does -- so we can just ask MD code |
64 | * to hook it up directly (ACPI interrupts are always level triggered |
65 | * and shareable, and return 0 for "not handled" and 1 for "handled"). |
66 | */ |
67 | |
68 | struct acpi_interrupt_handler { |
69 | LIST_ENTRY(acpi_interrupt_handler) aih_list; |
70 | UINT32 aih_intrnum; |
71 | ACPI_OSD_HANDLER aih_func; |
72 | void *aih_ih; |
73 | }; |
74 | |
75 | static LIST_HEAD(, acpi_interrupt_handler) acpi_interrupt_list = |
76 | LIST_HEAD_INITIALIZER(&acpi_interrupt_list); |
77 | |
78 | kmutex_t acpi_interrupt_list_mtx; |
79 | |
80 | /* |
81 | * AcpiOsInstallInterruptHandler: |
82 | * |
83 | * Install a handler for a hardware interrupt level. |
84 | */ |
85 | ACPI_STATUS |
86 | AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, |
87 | ACPI_OSD_HANDLER ServiceRoutine, void *Context) |
88 | { |
89 | struct acpi_interrupt_handler *aih; |
90 | ACPI_STATUS rv; |
91 | |
92 | if (InterruptNumber > 255) |
93 | return AE_BAD_PARAMETER; |
94 | if (ServiceRoutine == NULL) |
95 | return AE_BAD_PARAMETER; |
96 | |
97 | aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT); |
98 | if (aih == NULL) |
99 | return AE_NO_MEMORY; |
100 | |
101 | aih->aih_intrnum = InterruptNumber; |
102 | aih->aih_func = ServiceRoutine; |
103 | |
104 | rv = acpi_md_OsInstallInterruptHandler(InterruptNumber, |
105 | ServiceRoutine, Context, &aih->aih_ih); |
106 | if (rv == AE_OK) { |
107 | mutex_enter(&acpi_interrupt_list_mtx); |
108 | LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list); |
109 | mutex_exit(&acpi_interrupt_list_mtx); |
110 | } else |
111 | free(aih, M_ACPI); |
112 | |
113 | return rv; |
114 | } |
115 | |
116 | /* |
117 | * AcpiOsRemoveInterruptHandler: |
118 | * |
119 | * Remove an interrupt handler. |
120 | */ |
121 | ACPI_STATUS |
122 | AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, |
123 | ACPI_OSD_HANDLER ServiceRoutine) |
124 | { |
125 | struct acpi_interrupt_handler *aih; |
126 | |
127 | if (InterruptNumber > 255) |
128 | return AE_BAD_PARAMETER; |
129 | if (ServiceRoutine == NULL) |
130 | return AE_BAD_PARAMETER; |
131 | |
132 | mutex_enter(&acpi_interrupt_list_mtx); |
133 | LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) { |
134 | if (aih->aih_intrnum == InterruptNumber && |
135 | aih->aih_func == ServiceRoutine) { |
136 | LIST_REMOVE(aih, aih_list); |
137 | mutex_exit(&acpi_interrupt_list_mtx); |
138 | acpi_md_OsRemoveInterruptHandler(aih->aih_ih); |
139 | free(aih, M_ACPI); |
140 | return AE_OK; |
141 | } |
142 | } |
143 | mutex_exit(&acpi_interrupt_list_mtx); |
144 | return AE_NOT_EXIST; |
145 | } |
146 | |