OsdInterrupt.c revision 138300 
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: head/sys/dev/acpica/Osd/OsdInterrupt.c 138300 2004-12-02 00:25:35Z marks $
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
45ACPI_MODULE_NAME("INTERRUPT")
46
47static UINT32		InterruptOverride = 0;
48
49ACPI_STATUS
50AcpiOsInstallInterruptHandler(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
95error:
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
107ACPI_STATUS
108AcpiOsRemoveInterruptHandler(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
134ACPI_STATUS
135acpi_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