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 UINT32 InterruptOverride = 0; 48 49 ACPI_STATUS 50 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 51 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 52 { 53 struct acpi_softc *sc; 54 55 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 56 57 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 58 panic("can't find ACPI device to register interrupt"); 59 if (sc->acpi_dev == NULL) 60 panic("acpi softc has invalid device"); 61 62 if (InterruptNumber < 0 || InterruptNumber > 255) 63 return_ACPI_STATUS (AE_BAD_PARAMETER); 64 if (ServiceRoutine == NULL) 65 return_ACPI_STATUS (AE_BAD_PARAMETER); 66 67 /* 68 * If the MADT contained an interrupt override directive for the SCI, 69 * we use that value instead of the one from the FADT. 70 */ 71 if (InterruptOverride != 0) { 72 device_printf(sc->acpi_dev, 73 "Overriding SCI Interrupt from IRQ %u to IRQ %u\n", 74 InterruptNumber, InterruptOverride); 75 InterruptNumber = InterruptOverride; 76 } 77 78 /* Set up the interrupt resource. */ 79 sc->acpi_irq_rid = 0; 80 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1); 81 sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 82 &sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE); 83 if (sc->acpi_irq == NULL) { 84 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 85 goto error; 86 } 87 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC|INTR_MPSAFE, 88 (driver_intr_t *)ServiceRoutine, Context, &sc->acpi_irq_handle)) { 89 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 90 goto error; 91 } 92 93 return_ACPI_STATUS (AE_OK); 94 95 error: 96 if (sc->acpi_irq_handle) 97 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 98 sc->acpi_irq_handle = NULL; 99 if (sc->acpi_irq) 100 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 101 sc->acpi_irq = NULL; 102 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 103 104 return_ACPI_STATUS (AE_ALREADY_EXISTS); 105 } 106 107 ACPI_STATUS 108 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine) 109 { 110 struct acpi_softc *sc; 111 112 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 113 114 if (InterruptNumber < 0 || InterruptNumber > 255) 115 return_ACPI_STATUS (AE_BAD_PARAMETER); 116 if (ServiceRoutine == NULL) 117 return_ACPI_STATUS (AE_BAD_PARAMETER); 118 119 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 120 panic("can't find ACPI device to deregister interrupt"); 121 122 if (sc->acpi_irq == NULL) 123 return_ACPI_STATUS (AE_NOT_EXIST); 124 125 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 126 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 127 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 128 129 sc->acpi_irq = NULL; 130 131 return_ACPI_STATUS (AE_OK); 132 } 133 134 ACPI_STATUS 135 acpi_OverrideInterruptLevel(UINT32 InterruptNumber) 136 { 137 138 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 139 140 if (InterruptOverride != 0) 141 return_ACPI_STATUS (AE_ALREADY_EXISTS); 142 InterruptOverride = InterruptNumber; 143 return_ACPI_STATUS (AE_OK); 144 } 145