FreeBSD-5.3/sys/i386/i386/legacy.c
/*-
* Copyright 1998 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i386/i386/legacy.c,v 1.56 2004/08/16 21:55:29 gibbs Exp $");
/*
* This code implements a system driver for legacy systems that do not
* support ACPI or when ACPI support is not present in the kernel.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <machine/bus.h>
#include <sys/pcpu.h>
#include <sys/rman.h>
#include <sys/smp.h>
#include "opt_mca.h"
#ifdef DEV_MCA
#include <i386/bios/mca_machdep.h>
#endif
#include <machine/legacyvar.h>
#include <machine/resource.h>
static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device");
struct legacy_device {
int lg_pcibus;
};
#define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev))
static void legacy_identify(driver_t *driver, device_t parent);
static int legacy_probe(device_t);
static int legacy_attach(device_t);
static int legacy_print_child(device_t, device_t);
static device_t legacy_add_child(device_t bus, int order, const char *name,
int unit);
static int legacy_read_ivar(device_t, device_t, int, uintptr_t *);
static int legacy_write_ivar(device_t, device_t, int, uintptr_t);
static device_method_t legacy_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, legacy_identify),
DEVMETHOD(device_probe, legacy_probe),
DEVMETHOD(device_attach, legacy_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_print_child, legacy_print_child),
DEVMETHOD(bus_add_child, legacy_add_child),
DEVMETHOD(bus_read_ivar, legacy_read_ivar),
DEVMETHOD(bus_write_ivar, legacy_write_ivar),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
{ 0, 0 }
};
static driver_t legacy_driver = {
"legacy",
legacy_methods,
1, /* no softc */
};
static devclass_t legacy_devclass;
DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0);
static void
legacy_identify(driver_t *driver, device_t parent)
{
/*
* Add child device with order of 1 so it gets probed
* after ACPI (which is at order 0.
*/
if (BUS_ADD_CHILD(parent, 1, "legacy", 0) == NULL)
panic("legacy: could not attach");
}
static int
legacy_probe(device_t dev)
{
device_t acpi;
/*
* Fail to probe if ACPI is ok.
*/
acpi = devclass_get_device(devclass_find("acpi"), 0);
if (acpi != NULL && device_is_alive(acpi))
return (ENXIO);
device_set_desc(dev, "legacy system");
device_quiet(dev);
return (0);
}
static int
legacy_attach(device_t dev)
{
device_t child;
int i;
struct pcpu *pc;
/*
* First, let our child driver's identify any child devices that
* they can find. Once that is done attach any devices that we
* found.
*/
bus_generic_probe(dev);
bus_generic_attach(dev);
/* Attach CPU pseudo-driver. */
if (!devclass_get_device(devclass_find("cpu"), 0)) {
for (i = 0; i <= mp_maxid; i++)
if (!CPU_ABSENT(i)) {
pc = pcpu_find(i);
KASSERT(pc != NULL, ("pcpu_find failed"));
child = BUS_ADD_CHILD(dev, 0, "cpu", i);
if (child == NULL)
panic("legacy_attach cpu");
device_probe_and_attach(child);
pc->pc_device = child;
device_set_ivars(child, pc);
}
}
/*
* If we didn't see EISA or ISA on a pci bridge, create some
* connection points now so they show up "on motherboard".
*/
if (!devclass_get_device(devclass_find("eisa"), 0)) {
child = BUS_ADD_CHILD(dev, 0, "eisa", 0);
if (child == NULL)
panic("legacy_attach eisa");
device_probe_and_attach(child);
}
#ifdef DEV_MCA
if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) {
child = BUS_ADD_CHILD(dev, 0, "mca", 0);
if (child == 0)
panic("legacy_probe mca");
device_probe_and_attach(child);
}
#endif
if (!devclass_get_device(devclass_find("isa"), 0)) {
child = BUS_ADD_CHILD(dev, 0, "isa", 0);
if (child == NULL)
panic("legacy_attach isa");
device_probe_and_attach(child);
}
return 0;
}
static int
legacy_print_child(device_t bus, device_t child)
{
struct legacy_device *atdev = DEVTOAT(child);
int retval = 0;
retval += bus_print_child_header(bus, child);
if (atdev->lg_pcibus != -1)
retval += printf(" pcibus %d", atdev->lg_pcibus);
retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
return (retval);
}
static device_t
legacy_add_child(device_t bus, int order, const char *name, int unit)
{
device_t child;
struct legacy_device *atdev;
atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV,
M_NOWAIT | M_ZERO);
if (atdev == NULL)
return(NULL);
atdev->lg_pcibus = -1;
child = device_add_child_ordered(bus, order, name, unit);
if (child == NULL)
free(atdev, M_LEGACYDEV);
else
/* should we free this in legacy_child_detached? */
device_set_ivars(child, atdev);
return (child);
}
static int
legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct legacy_device *atdev = DEVTOAT(child);
switch (which) {
case LEGACY_IVAR_PCIBUS:
*result = atdev->lg_pcibus;
break;
default:
return ENOENT;
}
return 0;
}
static int
legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
struct legacy_device *atdev = DEVTOAT(child);
switch (which) {
case LEGACY_IVAR_PCIBUS:
atdev->lg_pcibus = value;
break;
default:
return ENOENT;
}
return 0;
}
/*
* Legacy CPU attachment when ACPI is not available. Drivers like
* cpufreq(4) hang off this.
*/
static int cpu_read_ivar(device_t dev, device_t child, int index,
uintptr_t *result);
static device_method_t cpu_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, bus_generic_probe),
DEVMETHOD(device_attach, bus_generic_attach),
DEVMETHOD(device_detach, bus_generic_detach),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
/* Bus interface */
DEVMETHOD(bus_read_ivar, cpu_read_ivar),
DEVMETHOD(bus_print_child, bus_generic_print_child),
DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
DEVMETHOD(bus_release_resource, bus_generic_release_resource),
DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
{ 0, 0 }
};
static driver_t cpu_driver = {
"cpu",
cpu_methods,
1, /* no softc */
};
static devclass_t cpu_devclass;
DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0);
static int
cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
struct pcpu *pc;
if (index != 0)
return (ENOENT);
pc = device_get_ivars(child);
if (pc == NULL)
return (ENOENT);
*result = (uintptr_t)pc;
return (0);
}