2 * Copyright (c) 2000 Michael Smith
3 * Copyright (c) 2000 BSDi
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
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.
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
27 * $FreeBSD: src/sys/dev/acpica/Osd/OsdInterrupt.c,v 1.17 2004/04/14 03:41:06 njl Exp $
28 * $DragonFly: src/sys/dev/acpica5/Osd/OsdInterrupt.c,v 1.7 2006/10/25 20:55:52 dillon Exp $
32 * 6.5 : Interrupt handling
35 #include <sys/param.h>
36 #include <sys/kernel.h>
39 #include <sys/thread2.h>
42 #include <dev/acpica5/acpivar.h>
44 #define _COMPONENT ACPI_OS_SERVICES
45 ACPI_MODULE_NAME("INTERRUPT")
47 static void InterruptWrapper(void *arg);
49 static ACPI_OSD_HANDLER InterruptHandler;
50 static UINT32 InterruptOverride = 0;
53 AcpiOsInstallInterruptHandler(UINT32 InterruptNumber,
54 ACPI_OSD_HANDLER ServiceRoutine, void *Context)
56 struct acpi_softc *sc;
58 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
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");
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);
73 InterruptHandler = ServiceRoutine;
76 * If the MADT contained an interrupt override directive for the SCI,
77 * we use that value instead of the one from the FADT.
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;
86 /* Set up the interrupt resource. */
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");
95 if (bus_setup_intr(sc->acpi_dev, sc->acpi_irq, 0,
96 InterruptWrapper, Context, &sc->acpi_irq_handle, NULL)) {
97 device_printf(sc->acpi_dev, "could not set up interrupt\n");
101 return_ACPI_STATUS (AE_OK);
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;
108 bus_release_resource(sc->acpi_dev, SYS_RES_IRQ, 0, sc->acpi_irq);
110 bus_delete_resource(sc->acpi_dev, SYS_RES_IRQ, 0);
111 InterruptHandler = NULL;
113 return_ACPI_STATUS (AE_ALREADY_EXISTS);
117 AcpiOsRemoveInterruptHandler(UINT32 InterruptNumber, ACPI_OSD_HANDLER ServiceRoutine)
119 struct acpi_softc *sc;
121 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
123 if (InterruptNumber < 0 || InterruptNumber > 255)
124 return_ACPI_STATUS (AE_BAD_PARAMETER);
125 if (ServiceRoutine == NULL)
126 return_ACPI_STATUS (AE_BAD_PARAMETER);
128 if ((sc = devclass_get_softc(devclass_find("acpi"), 0)) == NULL)
129 panic("can't find ACPI device to deregister interrupt");
131 if (sc->acpi_irq == NULL)
132 return_ACPI_STATUS (AE_NOT_EXIST);
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);
139 InterruptHandler = NULL;
141 return_ACPI_STATUS (AE_OK);
145 acpi_OverrideInterruptLevel(UINT32 InterruptNumber)
148 ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
150 if (InterruptOverride != 0)
151 return_ACPI_STATUS (AE_ALREADY_EXISTS);
152 InterruptOverride = InterruptNumber;
153 return_ACPI_STATUS (AE_OK);
157 InterruptWrapper(void *arg)
162 InterruptHandler(arg);