1 /*- 2 * Copyright (c) 2000 Michael Smith 3 * Copyright (c) 2000 BSDi 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 /* 31 * 6.5 : Interrupt handling 32 */ 33 34 #include <sys/param.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <machine/bus.h> 38 #include <machine/resource.h> 39 #include <sys/rman.h> 40 41 #include "acpi.h" 42 #include <dev/acpica/acpivar.h> 43 44 #define _COMPONENT ACPI_OS_SERVICES 45 ACPI_MODULE_NAME("INTERRUPT") 46 47 static void InterruptWrapper(void *arg); 48 49 static OSD_HANDLER InterruptHandler; 50 static UINT32 InterruptOverride = 0; 51 52 ACPI_STATUS 53 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 54 OSD_HANDLER ServiceRoutine, void *Context) 55 { 56 struct acpi_softc *sc; 57 58 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 59 60 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 61 panic("can't find ACPI device to register interrupt"); 62 if (sc->acpi_dev == NULL) 63 panic("acpi softc has invalid device"); 64 65 if (InterruptNumber < 0 || InterruptNumber > 255) 66 return_ACPI_STATUS (AE_BAD_PARAMETER); 67 if (ServiceRoutine == NULL) 68 return_ACPI_STATUS (AE_BAD_PARAMETER); 69 if (InterruptHandler != NULL) { 70 device_printf(sc->acpi_dev, "interrupt handler already installed\n"); 71 return_ACPI_STATUS (AE_ALREADY_EXISTS); 72 } 73 InterruptHandler = ServiceRoutine; 74 75 /* 76 * If the MADT contained an interrupt override directive for the SCI, 77 * we use that value instead of the one from the FADT. 78 */ 79 if (InterruptOverride != 0) { 80 device_printf(sc->acpi_dev, 81 "Overriding SCI Interrupt from IRQ %u to IRQ %u\n", 82 InterruptNumber, InterruptOverride); 83 InterruptNumber = InterruptOverride; 84 } 85 86 /* Set up the interrupt resource. */ 87 sc->acpi_irq_rid = 0; 88 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1); 89 sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 90 &sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE); 91 if (sc->acpi_irq == NULL) { 92 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 93 goto error; 94 } 95 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC, 96 InterruptWrapper, Context, &sc->acpi_irq_handle)) { 97 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 98 goto error; 99 } 100 101 return_ACPI_STATUS (AE_OK); 102 103 error: 104 if (sc->acpi_irq_handle) 105 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 106 sc->acpi_irq_handle = NULL; 107 if (sc->acpi_irq) 108 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 109 sc->acpi_irq = NULL; 110 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 111 InterruptHandler = NULL; 112 113 return_ACPI_STATUS (AE_ALREADY_EXISTS); 114 } 115 116 ACPI_STATUS 117 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, OSD_HANDLER ServiceRoutine) 118 { 119 struct acpi_softc *sc; 120 121 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 122 123 if (InterruptNumber < 0 || InterruptNumber > 255) 124 return_ACPI_STATUS (AE_BAD_PARAMETER); 125 if (ServiceRoutine == NULL) 126 return_ACPI_STATUS (AE_BAD_PARAMETER); 127 128 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 129 panic("can't find ACPI device to deregister interrupt"); 130 131 if (sc->acpi_irq == NULL) 132 return_ACPI_STATUS (AE_NOT_EXIST); 133 134 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 135 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 136 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 137 138 sc->acpi_irq = NULL; 139 InterruptHandler = NULL; 140 141 return_ACPI_STATUS (AE_OK); 142 } 143 144 ACPI_STATUS 145 acpi_OverrideInterruptLevel(UINT32 InterruptNumber) 146 { 147 148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 149 150 if (InterruptOverride != 0) 151 return_ACPI_STATUS (AE_ALREADY_EXISTS); 152 InterruptOverride = InterruptNumber; 153 return_ACPI_STATUS (AE_OK); 154 } 155 156 static void 157 InterruptWrapper(void *arg) 158 { 159 ACPI_LOCK_DECL; 160 161 ACPI_LOCK; 162 InterruptHandler(arg); 163 ACPI_UNLOCK; 164 } 165