| 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 | |