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FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sys/powerpc/aim/nexus.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.
*/
/*-
* Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS 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: release/9.1.0/sys/powerpc/aim/nexus.c 229093 2011-12-31 14:12:12Z hselasky $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <sys/cons.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/ofw/openfirm.h>
#include <machine/bus.h>
#include <machine/frame.h>
#include <machine/intr_machdep.h>
#include <machine/resource.h>
#include <sys/rman.h>
#include "ofw_bus_if.h"
#include "pic_if.h"
/*
* The nexus (which is a pseudo-bus actually) iterates over the nodes that
* exist in Open Firmware and adds them as devices to this bus so that drivers
* can be attached to them.
*
* Maybe this code should get into dev/ofw to some extent, as some of it should
* work for all Open Firmware based machines...
*/
static MALLOC_DEFINE(M_NEXUS, "nexus", "nexus device information");
enum nexus_ivars {
NEXUS_IVAR_NODE,
NEXUS_IVAR_NAME,
NEXUS_IVAR_DEVICE_TYPE,
NEXUS_IVAR_COMPATIBLE,
};
struct nexus_devinfo {
phandle_t ndi_node;
/* Some common properties. */
const char *ndi_name;
const char *ndi_device_type;
const char *ndi_compatible;
};
struct nexus_softc {
struct rman sc_rman;
};
/*
* Device interface
*/
static int nexus_probe(device_t);
static int nexus_attach(device_t);
/*
* Bus interface
*/
static device_t nexus_add_child(device_t, u_int, const char *, int);
static void nexus_probe_nomatch(device_t, device_t);
static int nexus_read_ivar(device_t, device_t, int, uintptr_t *);
static int nexus_write_ivar(device_t, device_t, int, uintptr_t);
#ifdef SMP
static int nexus_bind_intr(device_t dev, device_t child,
struct resource *irq, int cpu);
#endif
static int nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
enum intr_polarity pol);
static int nexus_setup_intr(device_t, device_t, struct resource *, int,
driver_filter_t *, driver_intr_t *, void *, void **);
static int nexus_teardown_intr(device_t, device_t, struct resource *,
void *);
static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
u_long, u_long, u_long, u_int);
static int nexus_activate_resource(device_t, device_t, int, int,
struct resource *);
static int nexus_deactivate_resource(device_t, device_t, int, int,
struct resource *);
static int nexus_release_resource(device_t, device_t, int, int,
struct resource *);
/*
* OFW bus interface.
*/
static phandle_t nexus_ofw_get_node(device_t, device_t);
static const char *nexus_ofw_get_name(device_t, device_t);
static const char *nexus_ofw_get_type(device_t, device_t);
static const char *nexus_ofw_get_compat(device_t, device_t);
/*
* Local routines
*/
static device_t nexus_device_from_node(device_t, phandle_t);
static device_method_t nexus_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, nexus_probe),
DEVMETHOD(device_attach, nexus_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. Resource management is business of the children... */
DEVMETHOD(bus_add_child, nexus_add_child),
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
DEVMETHOD(bus_probe_nomatch, nexus_probe_nomatch),
DEVMETHOD(bus_read_ivar, nexus_read_ivar),
DEVMETHOD(bus_write_ivar, nexus_write_ivar),
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),
DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
DEVMETHOD(bus_activate_resource, nexus_activate_resource),
DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
DEVMETHOD(bus_release_resource, nexus_release_resource),
/* OFW bus interface */
DEVMETHOD(ofw_bus_get_node, nexus_ofw_get_node),
DEVMETHOD(ofw_bus_get_name, nexus_ofw_get_name),
DEVMETHOD(ofw_bus_get_type, nexus_ofw_get_type),
DEVMETHOD(ofw_bus_get_compat, nexus_ofw_get_compat),
DEVMETHOD_END
};
static driver_t nexus_driver = {
"nexus",
nexus_methods,
sizeof(struct nexus_softc),
};
static devclass_t nexus_devclass;
DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
static int
nexus_probe(device_t dev)
{
bus_generic_probe(dev);
device_set_desc(dev, "Open Firmware Nexus device");
return (0);
}
static int
nexus_attach(device_t dev)
{
phandle_t root;
phandle_t child;
struct nexus_softc *sc;
u_long start, end;
sc = device_get_softc(dev);
start = 0;
end = MAX_PICS*INTR_VECTORS - 1;
sc->sc_rman.rm_start = start;
sc->sc_rman.rm_end = end;
sc->sc_rman.rm_type = RMAN_ARRAY;
sc->sc_rman.rm_descr = "Interrupt request lines";
if (rman_init(&sc->sc_rman) ||
rman_manage_region(&sc->sc_rman, start, end))
panic("nexus_probe IRQ rman");
if ((root = OF_peer(0)) == 0)
return (bus_generic_attach(dev));
/*
* Now walk the OFW tree to locate top-level devices
*/
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
if (child == -1)
panic("nexus_probe(): OF_child failed.");
(void)nexus_device_from_node(dev, child);
}
return (bus_generic_attach(dev));
}
static void
nexus_probe_nomatch(device_t dev, device_t child)
{
char *name, *type;
if (BUS_READ_IVAR(dev, child, NEXUS_IVAR_NAME,
(uintptr_t *)&name) != 0 ||
BUS_READ_IVAR(dev, child, NEXUS_IVAR_DEVICE_TYPE,
(uintptr_t *)&type) != 0)
return;
if (type == NULL)
type = "(unknown)";
if (bootverbose)
device_printf(dev, "<%s>, type %s (no driver attached)\n",
name, type);
}
static device_t
nexus_add_child(device_t dev, u_int order, const char *name, int unit)
{
device_t child;
struct nexus_devinfo *dinfo;
child = device_add_child_ordered(dev, order, name, unit);
if (child == NULL)
return (NULL);
dinfo = malloc(sizeof(struct nexus_devinfo), M_NEXUS, M_NOWAIT|M_ZERO);
if (dinfo == NULL)
return (NULL);
dinfo->ndi_node = -1;
dinfo->ndi_name = name;
device_set_ivars(child, dinfo);
return (child);
}
static int
nexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(child)) == 0)
return (ENOENT);
switch (which) {
case NEXUS_IVAR_NODE:
*result = dinfo->ndi_node;
break;
case NEXUS_IVAR_NAME:
*result = (uintptr_t)dinfo->ndi_name;
break;
case NEXUS_IVAR_DEVICE_TYPE:
*result = (uintptr_t)dinfo->ndi_device_type;
break;
case NEXUS_IVAR_COMPATIBLE:
*result = (uintptr_t)dinfo->ndi_compatible;
break;
default:
return (ENOENT);
}
return 0;
}
static int
nexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(child)) == 0)
return (ENOENT);
switch (which) {
case NEXUS_IVAR_NAME:
return (EINVAL);
/* Identified devices may want to set these */
case NEXUS_IVAR_NODE:
dinfo->ndi_node = (phandle_t)value;
break;
case NEXUS_IVAR_DEVICE_TYPE:
dinfo->ndi_device_type = (char *)value;
break;
default:
return (ENOENT);
}
return 0;
}
static int
nexus_setup_intr(device_t dev, device_t child, struct resource *res, int flags,
driver_filter_t *filter, driver_intr_t *ihand, void *arg, void **cookiep)
{
int error;
/* somebody tried to setup an irq that failed to allocate! */
if (res == NULL)
panic("nexus_setup_intr: NULL irq resource!");
*cookiep = 0;
if ((rman_get_flags(res) & RF_SHAREABLE) == 0)
flags |= INTR_EXCL;
/*
* We depend here on rman_activate_resource() being idempotent.
*/
error = rman_activate_resource(res);
if (error)
return (error);
error = powerpc_setup_intr(device_get_nameunit(child),
rman_get_start(res), filter, ihand, arg, flags, cookiep);
return (error);
}
static int
nexus_teardown_intr(device_t dev, device_t child, struct resource *res,
void *cookie)
{
return (powerpc_teardown_intr(cookie));
}
#ifdef SMP
static int
nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
{
return (powerpc_bind_intr(rman_get_start(irq), 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));
}
/*
* Allocate resources at the behest of a child. This only handles interrupts,
* since I/O resources are handled by child busses.
*/
static struct resource *
nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
u_long start, u_long end, u_long count, u_int flags)
{
struct nexus_softc *sc;
struct resource *rv;
if (type != SYS_RES_IRQ) {
device_printf(bus, "unknown resource request from %s\n",
device_get_nameunit(child));
return (NULL);
}
if (count == 0 || start + count - 1 != end) {
device_printf(bus, "invalid IRQ allocation from %s\n",
device_get_nameunit(child));
return (NULL);
}
sc = device_get_softc(bus);
rv = rman_reserve_resource(&sc->sc_rman, start, end, count,
flags, child);
if (rv == NULL) {
device_printf(bus, "IRQ allocation failed for %s\n",
device_get_nameunit(child));
} else
rman_set_rid(rv, *rid);
return (rv);
}
static int
nexus_activate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
/* Not much to be done yet... */
return (rman_activate_resource(res));
}
static int
nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
/* Not much to be done yet... */
return (rman_deactivate_resource(res));
}
static int
nexus_release_resource(device_t bus, device_t child, int type, int rid,
struct resource *res)
{
if (type != SYS_RES_IRQ) {
device_printf(bus, "unknown resource request from %s\n",
device_get_nameunit(child));
return (EINVAL);
}
return (rman_release_resource(res));
}
static device_t
nexus_device_from_node(device_t parent, phandle_t node)
{
device_t cdev;
struct nexus_devinfo *dinfo;
char *name, *type, *compatible;
OF_getprop_alloc(node, "name", 1, (void **)&name);
OF_getprop_alloc(node, "device_type", 1, (void **)&type);
OF_getprop_alloc(node, "compatible", 1, (void **)&compatible);
cdev = device_add_child(parent, NULL, -1);
if (cdev != NULL) {
dinfo = malloc(sizeof(*dinfo), M_NEXUS, M_WAITOK);
dinfo->ndi_node = node;
dinfo->ndi_name = name;
dinfo->ndi_device_type = type;
dinfo->ndi_compatible = compatible;
device_set_ivars(cdev, dinfo);
} else
free(name, M_OFWPROP);
return (cdev);
}
static const char *
nexus_ofw_get_name(device_t bus, device_t dev)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(dev)) == NULL)
return (NULL);
return (dinfo->ndi_name);
}
static phandle_t
nexus_ofw_get_node(device_t bus, device_t dev)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(dev)) == NULL)
return (0);
return (dinfo->ndi_node);
}
static const char *
nexus_ofw_get_type(device_t bus, device_t dev)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(dev)) == NULL)
return (NULL);
return (dinfo->ndi_device_type);
}
static const char *
nexus_ofw_get_compat(device_t bus, device_t dev)
{
struct nexus_devinfo *dinfo;
if ((dinfo = device_get_ivars(dev)) == NULL)
return (NULL);
return (dinfo->ndi_compatible);
}