freebsd-dev/sys/powerpc/ofw/ofw_cpu.c
Nathan Whitehorn 65d08437ef Move Open Firmware device root on PowerPC, ARM, and MIPS systems to
a sub-node of nexus (ofwbus) rather than direct attach under nexus. This
fixes FDT on x86 and will make coexistence with ACPI on ARM systems easier.
SPARC is unchanged.

Reviewed by:	imp, ian
2014-02-05 14:44:22 +00:00

215 lines
5.9 KiB
C

/*-
* Copyright (C) 2009 Nathan Whitehorn
* 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 Benno Rice ``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 TOOLS GMBH 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("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <machine/bus.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
static int ofw_cpulist_probe(device_t);
static int ofw_cpulist_attach(device_t);
static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
device_t child);
static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information");
static device_method_t ofw_cpulist_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ofw_cpulist_probe),
DEVMETHOD(device_attach, ofw_cpulist_attach),
/* Bus interface */
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
/* ofw_bus interface */
DEVMETHOD(ofw_bus_get_devinfo, ofw_cpulist_get_devinfo),
DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
DEVMETHOD_END
};
static driver_t ofw_cpulist_driver = {
"cpulist",
ofw_cpulist_methods,
0
};
static devclass_t ofw_cpulist_devclass;
DRIVER_MODULE(ofw_cpulist, ofwbus, ofw_cpulist_driver, ofw_cpulist_devclass,
0, 0);
static int
ofw_cpulist_probe(device_t dev)
{
const char *name;
name = ofw_bus_get_name(dev);
if (name == NULL || strcmp(name, "cpus") != 0)
return (ENXIO);
device_set_desc(dev, "Open Firmware CPU Group");
return (0);
}
static int
ofw_cpulist_attach(device_t dev)
{
phandle_t root, child;
device_t cdev;
struct ofw_bus_devinfo *dinfo;
root = ofw_bus_get_node(dev);
for (child = OF_child(root); child != 0; child = OF_peer(child)) {
dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO);
if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
free(dinfo, M_OFWCPU);
continue;
}
cdev = device_add_child(dev, NULL, -1);
if (cdev == NULL) {
device_printf(dev, "<%s>: device_add_child failed\n",
dinfo->obd_name);
ofw_bus_gen_destroy_devinfo(dinfo);
free(dinfo, M_OFWCPU);
continue;
}
device_set_ivars(cdev, dinfo);
}
return (bus_generic_attach(dev));
}
static const struct ofw_bus_devinfo *
ofw_cpulist_get_devinfo(device_t dev, device_t child)
{
return (device_get_ivars(child));
}
static int ofw_cpu_probe(device_t);
static int ofw_cpu_attach(device_t);
static int ofw_cpu_read_ivar(device_t dev, device_t child, int index,
uintptr_t *result);
struct ofw_cpu_softc {
struct pcpu *sc_cpu_pcpu;
uint32_t sc_nominal_mhz;
};
static device_method_t ofw_cpu_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, ofw_cpu_probe),
DEVMETHOD(device_attach, ofw_cpu_attach),
/* Bus interface */
DEVMETHOD(bus_add_child, bus_generic_add_child),
DEVMETHOD(bus_read_ivar, ofw_cpu_read_ivar),
DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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_END
};
static driver_t ofw_cpu_driver = {
"cpu",
ofw_cpu_methods,
sizeof(struct ofw_cpu_softc)
};
static devclass_t ofw_cpu_devclass;
DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0);
static int
ofw_cpu_probe(device_t dev)
{
const char *type = ofw_bus_get_type(dev);
if (strcmp(type, "cpu") != 0)
return (ENXIO);
device_set_desc(dev, "Open Firmware CPU");
return (0);
}
static int
ofw_cpu_attach(device_t dev)
{
struct ofw_cpu_softc *sc;
uint32_t cell;
sc = device_get_softc(dev);
OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell));
sc->sc_cpu_pcpu = pcpu_find(cell);
OF_getprop(ofw_bus_get_node(dev), "clock-frequency", &cell, sizeof(cell));
sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */
bus_generic_probe(dev);
return (bus_generic_attach(dev));
}
static int
ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
{
struct ofw_cpu_softc *sc;
sc = device_get_softc(dev);
switch (index) {
case CPU_IVAR_PCPU:
*result = (uintptr_t)sc->sc_cpu_pcpu;
return (0);
case CPU_IVAR_NOMINAL_MHZ:
*result = (uintptr_t)sc->sc_nominal_mhz;
return (0);
}
return (ENOENT);
}