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 28 /* 29 * 6.5 : Interrupt handling 30 */ 31 32 #include <sys/cdefs.h> 33 __FBSDID("$FreeBSD$"); 34 35 #include <sys/param.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <machine/bus.h> 39 #include <machine/resource.h> 40 #include <sys/rman.h> 41 42 #include <contrib/dev/acpica/acpi.h> 43 #include <dev/acpica/acpivar.h> 44 45 #define _COMPONENT ACPI_OS_SERVICES 46 ACPI_MODULE_NAME("INTERRUPT") 47 48 static UINT32 InterruptOverride = 0; 49 50 ACPI_STATUS 51 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber, 52 ACPI_OSD_HANDLER ServiceRoutine, void *Context) 53 { 54 struct acpi_softc *sc; 55 56 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 57 58 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 59 panic("can't find ACPI device to register interrupt"); 60 if (sc->acpi_dev == NULL) 61 panic("acpi softc has invalid device"); 62 63 if (InterruptNumber < 0 || InterruptNumber > 255) 64 return_ACPI_STATUS (AE_BAD_PARAMETER); 65 if (ServiceRoutine == NULL) 66 return_ACPI_STATUS (AE_BAD_PARAMETER); 67 68 /* 69 * If the MADT contained an interrupt override directive for the SCI, 70 * we use that value instead of the one from the FADT. 71 */ 72 if (InterruptOverride != 0) { 73 device_printf(sc->acpi_dev, 74 "Overriding SCI Interrupt from IRQ %u to IRQ %u\n", 75 InterruptNumber, InterruptOverride); 76 InterruptNumber = InterruptOverride; 77 } 78 79 /* Set up the interrupt resource. */ 80 sc->acpi_irq_rid = 0; 81 bus_set_resource(sc->acpi_dev, SYS_RES_IRQ, 0, InterruptNumber, 1); 82 sc->acpi_irq = bus_alloc_resource_any(sc->acpi_dev, SYS_RES_IRQ, 83 &sc->acpi_irq_rid, RF_SHAREABLE | RF_ACTIVE); 84 if (sc->acpi_irq == NULL) { 85 device_printf(sc->acpi_dev, "could not allocate interrupt\n"); 86 goto error; 87 } 88 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, INTR_TYPE_MISC|INTR_MPSAFE, 89 (driver_intr_t *)ServiceRoutine, Context, &sc->acpi_irq_handle)) { 90 device_printf(sc->acpi_dev, "could not set up interrupt\n"); 91 goto error; 92 } 93 94 return_ACPI_STATUS (AE_OK); 95 96 error: 97 if (sc->acpi_irq_handle) 98 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 99 sc->acpi_irq_handle = NULL; 100 if (sc->acpi_irq) 101 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 102 sc->acpi_irq = NULL; 103 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 104 105 return_ACPI_STATUS (AE_ALREADY_EXISTS); 106 } 107 108 ACPI_STATUS 109 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine) 110 { 111 struct acpi_softc *sc; 112 113 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 114 115 if (InterruptNumber < 0 || InterruptNumber > 255) 116 return_ACPI_STATUS (AE_BAD_PARAMETER); 117 if (ServiceRoutine == NULL) 118 return_ACPI_STATUS (AE_BAD_PARAMETER); 119 120 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL) 121 panic("can't find ACPI device to deregister interrupt"); 122 123 if (sc->acpi_irq == NULL) 124 return_ACPI_STATUS (AE_NOT_EXIST); 125 126 bus_teardown_intr(sc->acpi_dev, sc->acpi_irq, sc->acpi_irq_handle); 127 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq); 128 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0); 129 130 sc->acpi_irq = NULL; 131 132 return_ACPI_STATUS (AE_OK); 133 } 134 135 ACPI_STATUS 136 acpi_OverrideInterruptLevel(UINT32 InterruptNumber) 137 { 138 139 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__); 140 141 if (InterruptOverride != 0) 142 return_ACPI_STATUS (AE_ALREADY_EXISTS); 143 InterruptOverride = InterruptNumber; 144 return_ACPI_STATUS (AE_OK); 145 } 146