165 lines
4.7 KiB
C
165 lines
4.7 KiB
C
/*-
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* Copyright (c) 2000 Michael Smith
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* Copyright (c) 2000 BSDi
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* XXX This is all pretty dubious, since we really want the APIC and co.
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* up and running long before attaching interrupts, etc.
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*/
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#include "opt_acpi.h"
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include "acpi.h"
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#include <dev/acpica/acpivar.h>
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#define APIC_MAGIC 0x43495041 /* "APIC" */
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struct acpi_apic_softc {
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device_t apic_dev;
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IO_APIC *apic_ioapic;
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};
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static void acpi_apic_identify(driver_t *driver, device_t bus);
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static int acpi_apic_probe(device_t dev);
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static int acpi_apic_attach(device_t dev);
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static device_method_t acpi_apic_methods[] = {
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/* Device interface */
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DEVMETHOD(device_identify, acpi_apic_identify),
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DEVMETHOD(device_probe, acpi_apic_probe),
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DEVMETHOD(device_attach, acpi_apic_attach),
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{0, 0}
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};
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static driver_t acpi_apic_driver = {
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"acpi_apic",
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acpi_apic_methods,
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sizeof(struct acpi_apic_softc),
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};
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devclass_t acpi_apic_devclass;
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DRIVER_MODULE(acpi_apic, acpi, acpi_apic_driver, acpi_apic_devclass, 0, 0);
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static void
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acpi_apic_identify(driver_t *driver, device_t bus)
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{
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#if 1
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return;
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#else /* broken by new ACPICA update that doesn't support the APIC table */
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ACPI_BUFFER buf;
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ACPI_STATUS status;
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APIC_HEADER *hdr;
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APIC_TABLE *tbl;
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device_t child;
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int len;
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void *private;
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/*
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* Perform the tedious double-get to fetch the actual table.
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*/
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buf.Length = 0;
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buf.Pointer = NULL;
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if ((status = AcpiGetTable(ACPI_TABLE_APIC, 1, &buf)) != AE_BUFFER_OVERFLOW) {
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if (status != AE_NOT_EXIST)
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device_printf(bus, "error sizing APIC table - %s\n", acpi_strerror(status));
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return;
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}
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if ((buf.Pointer = AcpiOsAllocate(buf.Length)) == NULL)
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return;
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if ((status = AcpiGetTable(ACPI_TABLE_APIC, 1, &buf)) != AE_OK) {
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device_printf(bus, "error fetching APIC table - %s\n", acpi_strerror(status));
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return;
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}
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/*
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* Scan the tables, create child devices for each I/O APIC found
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*/
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tbl = (APIC_TABLE *)buf.Pointer;
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len = tbl->header.Length - sizeof(APIC_TABLE);
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hdr = (APIC_HEADER *)((char *)buf.Pointer + sizeof(APIC_TABLE));
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while(len > 0) {
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if (hdr->Length > len) {
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device_printf(bus, "APIC header corrupt (claims %d bytes where only %d left in structure)\n",
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hdr->Length, len);
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break;
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}
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switch (hdr->Type) {
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case APIC_IO:
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if ((child = BUS_ADD_CHILD(bus, 0, "acpi_apic", -1)) == NULL) {
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device_printf(bus, "could not create I/O APIC device");
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break;
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}
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if ((private = AcpiOsAllocate(hdr->Length)) == NULL) {
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device_printf(bus, "could not allocate memory for APIC child");
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break;
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}
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bcopy(hdr, private, hdr->Length);
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acpi_set_magic(child, APIC_MAGIC);
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acpi_set_private(child, private);
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device_set_desc(child, "I/O APIC");
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break;
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}
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len -= hdr->Length;
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hdr = (APIC_HEADER *)((char *)hdr + hdr->Length);
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}
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AcpiOsFree(buf.Pointer);
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#endif
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}
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static int
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acpi_apic_probe(device_t dev)
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{
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if (acpi_get_magic(dev) == APIC_MAGIC)
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return(0);
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return(ENXIO);
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}
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static int
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acpi_apic_attach(device_t dev)
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{
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struct acpi_apic_softc *sc;
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sc = device_get_softc(dev);
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sc->apic_dev = dev;
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/*
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* Fetch our parameters.
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*/
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sc->apic_ioapic = acpi_get_private(dev);
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device_printf(dev, "I/O APIC ID %d at 0x%08x vectors 0%x\n",
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sc->apic_ioapic->IoApicId, sc->apic_ioapic->IoApicAddress, sc->apic_ioapic->Vector);
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return(0);
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}
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