mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
16a1c0a829
will be used with arm64 to find which cpus to enable, and could also be used with 32-bit arm and mips for the same purpose. Differential Revision: https://reviews.freebsd.org/D1825 Sponsored by: The FreeBSD Foundation
325 lines
8.6 KiB
C
325 lines
8.6 KiB
C
/*-
|
|
* Copyright (C) 2009 Nathan Whitehorn
|
|
* Copyright (C) 2015 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* Portions of this software were developed by Andrew Turner
|
|
* under sponsorship from the FreeBSD Foundation.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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>
|
|
#include <dev/ofw/ofw_cpu.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");
|
|
|
|
struct ofw_cpulist_softc {
|
|
pcell_t sc_addr_cells;
|
|
};
|
|
|
|
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,
|
|
sizeof(struct ofw_cpulist_softc)
|
|
};
|
|
|
|
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)
|
|
{
|
|
struct ofw_cpulist_softc *sc;
|
|
phandle_t root, child;
|
|
device_t cdev;
|
|
struct ofw_bus_devinfo *dinfo;
|
|
|
|
sc = device_get_softc(dev);
|
|
root = ofw_bus_get_node(dev);
|
|
|
|
sc->sc_addr_cells = 1;
|
|
OF_getencprop(root, "#address-cells", &sc->sc_addr_cells,
|
|
sizeof(sc->sc_addr_cells));
|
|
|
|
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;
|
|
boolean_t sc_reg_valid;
|
|
pcell_t sc_reg[2];
|
|
};
|
|
|
|
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 (type == NULL || 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_cpulist_softc *psc;
|
|
struct ofw_cpu_softc *sc;
|
|
phandle_t node;
|
|
pcell_t cell;
|
|
int rv;
|
|
|
|
sc = device_get_softc(dev);
|
|
psc = device_get_softc(device_get_parent(dev));
|
|
|
|
if (nitems(sc->sc_reg) < psc->sc_addr_cells) {
|
|
if (bootverbose)
|
|
device_printf(dev, "Too many address cells\n");
|
|
return (EINVAL);
|
|
}
|
|
|
|
node = ofw_bus_get_node(dev);
|
|
|
|
/* Read and validate the reg property for use later */
|
|
sc->sc_reg_valid = false;
|
|
rv = OF_getencprop(node, "reg", sc->sc_reg, sizeof(sc->sc_reg));
|
|
if (rv < 0)
|
|
device_printf(dev, "missing 'reg' property\n");
|
|
else if ((rv % 4) != 0) {
|
|
if (bootverbose)
|
|
device_printf(dev, "Malformed reg property\n");
|
|
} else if ((rv / 4) != psc->sc_addr_cells) {
|
|
if (bootverbose)
|
|
device_printf(dev, "Invalid reg size %u\n", rv);
|
|
} else
|
|
sc->sc_reg_valid = true;
|
|
|
|
sc->sc_cpu_pcpu = pcpu_find(device_get_unit(dev));
|
|
|
|
if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) < 0) {
|
|
if (bootverbose)
|
|
device_printf(dev,
|
|
"missing 'clock-frequency' property\n");
|
|
} else
|
|
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_cpulist_softc *psc;
|
|
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:
|
|
if (sc->sc_nominal_mhz > 0) {
|
|
*result = (uintptr_t)sc->sc_nominal_mhz;
|
|
return (0);
|
|
}
|
|
break;
|
|
case CPU_IVAR_CPUID_SIZE:
|
|
psc = device_get_softc(device_get_parent(dev));
|
|
*result = psc->sc_addr_cells;
|
|
return (0);
|
|
case CPU_IVAR_CPUID:
|
|
if (sc->sc_reg_valid) {
|
|
*result = (uintptr_t)sc->sc_reg;
|
|
return (0);
|
|
}
|
|
break;
|
|
}
|
|
|
|
return (ENOENT);
|
|
}
|
|
|
|
int
|
|
ofw_cpu_early_foreach(ofw_cpu_foreach_cb callback, boolean_t only_runnable)
|
|
{
|
|
phandle_t node, child;
|
|
pcell_t addr_cells, reg[2];
|
|
char status[16];
|
|
u_int id;
|
|
int count, rv;
|
|
|
|
count = 0;
|
|
id = 0;
|
|
|
|
node = OF_finddevice("/cpus");
|
|
if (node == -1)
|
|
return (-1);
|
|
|
|
/* Find the number of cells in the cpu register */
|
|
if (OF_getencprop(node, "#address-cells", &addr_cells,
|
|
sizeof(addr_cells)) < 0)
|
|
return (-1);
|
|
|
|
for (child = OF_child(node); child != 0; child = OF_peer(child), id++) {
|
|
/*
|
|
* If we are filtering by runnable then limit to only
|
|
* those that have been enabled.
|
|
*/
|
|
if (only_runnable) {
|
|
status[0] = '\0';
|
|
OF_getprop(child, "status", status, sizeof(status));
|
|
if (status[0] != '\0' && strcmp(status, "okay") != 0)
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Check we have a register to identify the cpu
|
|
*/
|
|
rv = OF_getencprop(child, "reg", reg,
|
|
addr_cells * sizeof(cell_t));
|
|
if (rv != addr_cells * sizeof(cell_t))
|
|
continue;
|
|
|
|
if (callback == NULL || callback(id, child, addr_cells, reg))
|
|
count++;
|
|
}
|
|
|
|
return (only_runnable ? count : id);
|
|
}
|