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/*-
* Copyright 1998 Massachusetts Institute of Technology
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>.
* Copyright 2006 by Marius Strobl <marius@FreeBSD.org>.
* All rights reserved.
*
* 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.
*
* from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#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 <sys/pcpu.h>
#include <sys/rman.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/intr_machdep.h>
#include <machine/resource.h>
/*
* The nexus handles root-level resource allocation requests and interrupt
* mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY().
*/
static device_probe_t nexus_probe;
static device_attach_t nexus_attach;
static bus_setup_intr_t nexus_setup_intr;
static bus_teardown_intr_t nexus_teardown_intr;
static bus_activate_resource_t nexus_activate_resource;
static bus_deactivate_resource_t nexus_deactivate_resource;
#ifdef SMP
static bus_bind_intr_t nexus_bind_intr;
#endif
static bus_config_intr_t nexus_config_intr;
static ofw_bus_map_intr_t nexus_ofw_map_intr;
static device_method_t nexus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_probe),
DEVMETHOD(device_attach, nexus_attach),
/* Bus interface */
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_activate_resource, nexus_activate_resource),
DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
DEVMETHOD(bus_setup_intr, nexus_setup_intr),
DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
#ifdef SMP
DEVMETHOD(bus_bind_intr, nexus_bind_intr),
#endif
DEVMETHOD(bus_config_intr, nexus_config_intr),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr),
DEVMETHOD_END
};
static devclass_t nexus_devclass;
DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1);
EARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0,
BUS_PASS_BUS);
MODULE_VERSION(nexus, 1);
static int
nexus_probe(device_t dev)
{
device_quiet(dev); /* suppress attach message for neatness */
return (BUS_PROBE_DEFAULT);
}
static int
nexus_attach(device_t dev)
{
bus_generic_probe(dev);
bus_generic_attach(dev);
return (0);
}
static int
nexus_setup_intr(device_t bus __unused, device_t child, struct resource *r,
int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg,
void **cookiep)
{
int error;
if (r == NULL)
panic("%s: NULL interrupt resource!", __func__);
if ((rman_get_flags(r) & RF_SHAREABLE) == 0)
flags |= INTR_EXCL;
/* We depend here on rman_activate_resource() being idempotent. */
error = rman_activate_resource(r);
if (error)
return (error);
error = powerpc_setup_intr(device_get_nameunit(child),
rman_get_start(r), filt, intr, arg, flags, cookiep);
return (error);
}
static int
nexus_teardown_intr(device_t bus __unused, device_t child __unused,
struct resource *r, void *ih)
{
if (r == NULL)
return (EINVAL);
return (powerpc_teardown_intr(ih));
}
#ifdef SMP
static int
nexus_bind_intr(device_t bus __unused, device_t child __unused,
struct resource *r, int cpu)
{
return (powerpc_bind_intr(rman_get_start(r), cpu));
}
#endif
static int
nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
enum intr_polarity pol)
{
return (powerpc_config_intr(irq, trig, pol));
}
static int
nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells,
pcell_t *irq)
{
u_int intr = MAP_IRQ(iparent, irq[0]);
if (icells > 1)
powerpc_fw_config_intr(intr, irq[1]);
return (intr);
}
static int
nexus_activate_resource(device_t bus __unused, device_t child __unused,
int type, int rid __unused, struct resource *r)
{
if (type == SYS_RES_MEMORY) {
vm_offset_t start;
void *p;
start = (vm_offset_t) rman_get_start(r);
if (bootverbose)
printf("nexus mapdev: start %zx, len %ld\n", start,
rman_get_size(r));
p = pmap_mapdev(start, (vm_size_t) rman_get_size(r));
if (p == NULL)
return (ENOMEM);
rman_set_virtual(r, p);
rman_set_bustag(r, &bs_be_tag);
rman_set_bushandle(r, (u_long)p);
}
return (rman_activate_resource(r));
}
static int
nexus_deactivate_resource(device_t bus __unused, device_t child __unused,
int type __unused, int rid __unused, struct resource *r)
{
/*
* If this is a memory resource, unmap it.
*/
if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) {
bus_size_t psize;
psize = rman_get_size(r);
pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize);
}
return (rman_deactivate_resource(r));
}
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