OsdInterrupt.c revision 148318 
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: head/sys/dev/acpica/Osd/OsdInterrupt.c 148318 2005-07-22 23:10:02Z njl $");
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 "acpi.h"
43#include <dev/acpica/acpivar.h>
44
45#define _COMPONENT	ACPI_OS_SERVICES
46ACPI_MODULE_NAME("INTERRUPT")
47
48static UINT32		InterruptOverride = 0;
49
50ACPI_STATUS
51AcpiOsInstallInterruptHandler(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
96error:
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
108ACPI_STATUS
109AcpiOsRemoveInterruptHandler(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
135ACPI_STATUS
136acpi_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