1 /* $NetBSD: OsdInterrupt.c,v 1.7 2007/12/15 00:39:25 perry 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 1.7 2007/12/15 00:39:25 perry 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 ACPI_FUNCTION_TRACE(__func__); 93 94 if (InterruptNumber > 255) 95 return_ACPI_STATUS(AE_BAD_PARAMETER); 96 if (ServiceRoutine == NULL) 97 return_ACPI_STATUS(AE_BAD_PARAMETER); 98 99 aih = malloc(sizeof(*aih), M_ACPI, M_NOWAIT); 100 if (aih == NULL) 101 return_ACPI_STATUS(AE_NO_MEMORY); 102 103 aih->aih_intrnum = InterruptNumber; 104 aih->aih_func = ServiceRoutine; 105 106 rv = acpi_md_OsInstallInterruptHandler(InterruptNumber, 107 ServiceRoutine, Context, &aih->aih_ih); 108 if (rv == AE_OK) { 109 mutex_enter(&acpi_interrupt_list_mtx); 110 LIST_INSERT_HEAD(&acpi_interrupt_list, aih, aih_list); 111 mutex_exit(&acpi_interrupt_list_mtx); 112 } else 113 free(aih, M_ACPI); 114 115 return_ACPI_STATUS(rv); 116 } 117 118 /* 119 * AcpiOsRemoveInterruptHandler: 120 * 121 * Remove an interrupt handler. 122 */ 123 ACPI_STATUS 124 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, 125 ACPI_OSD_HANDLER ServiceRoutine) 126 { 127 struct acpi_interrupt_handler *aih; 128 129 ACPI_FUNCTION_TRACE(__func__); 130 131 if (InterruptNumber > 255) 132 return_ACPI_STATUS(AE_BAD_PARAMETER); 133 if (ServiceRoutine == NULL) 134 return_ACPI_STATUS(AE_BAD_PARAMETER); 135 136 mutex_enter(&acpi_interrupt_list_mtx); 137 LIST_FOREACH(aih, &acpi_interrupt_list, aih_list) { 138 if (aih->aih_intrnum == InterruptNumber && 139 aih->aih_func == ServiceRoutine) { 140 LIST_REMOVE(aih, aih_list); 141 mutex_exit(&acpi_interrupt_list_mtx); 142 acpi_md_OsRemoveInterruptHandler(aih->aih_ih); 143 free(aih, M_ACPI); 144 return_ACPI_STATUS(AE_OK); 145 } 146 } 147 mutex_exit(&acpi_interrupt_list_mtx); 148 return_ACPI_STATUS(AE_NOT_EXIST); 149 } 150