348 lines
9.3 KiB
C
348 lines
9.3 KiB
C
/*-
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* Copyright (C) 2009 Nathan Whitehorn
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* Copyright (C) 2015 The FreeBSD Foundation
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* All rights reserved.
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*
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* Portions of this software were developed by Andrew Turner
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* under sponsorship from the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <machine/bus.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/ofw/ofw_cpu.h>
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static int ofw_cpulist_probe(device_t);
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static int ofw_cpulist_attach(device_t);
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static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev,
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device_t child);
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static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information");
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struct ofw_cpulist_softc {
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pcell_t sc_addr_cells;
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};
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static device_method_t ofw_cpulist_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ofw_cpulist_probe),
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DEVMETHOD(device_attach, ofw_cpulist_attach),
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
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/* ofw_bus interface */
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DEVMETHOD(ofw_bus_get_devinfo, ofw_cpulist_get_devinfo),
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DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat),
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DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model),
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DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name),
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DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node),
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DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type),
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DEVMETHOD_END
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};
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static driver_t ofw_cpulist_driver = {
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"cpulist",
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ofw_cpulist_methods,
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sizeof(struct ofw_cpulist_softc)
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};
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static devclass_t ofw_cpulist_devclass;
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DRIVER_MODULE(ofw_cpulist, ofwbus, ofw_cpulist_driver, ofw_cpulist_devclass,
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0, 0);
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static int
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ofw_cpulist_probe(device_t dev)
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{
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const char *name;
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name = ofw_bus_get_name(dev);
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if (name == NULL || strcmp(name, "cpus") != 0)
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return (ENXIO);
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device_set_desc(dev, "Open Firmware CPU Group");
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return (0);
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}
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static int
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ofw_cpulist_attach(device_t dev)
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{
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struct ofw_cpulist_softc *sc;
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phandle_t root, child;
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device_t cdev;
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struct ofw_bus_devinfo *dinfo;
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sc = device_get_softc(dev);
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root = ofw_bus_get_node(dev);
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sc->sc_addr_cells = 1;
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OF_getencprop(root, "#address-cells", &sc->sc_addr_cells,
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sizeof(sc->sc_addr_cells));
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for (child = OF_child(root); child != 0; child = OF_peer(child)) {
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dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO);
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if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) {
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free(dinfo, M_OFWCPU);
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continue;
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}
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cdev = device_add_child(dev, NULL, -1);
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if (cdev == NULL) {
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device_printf(dev, "<%s>: device_add_child failed\n",
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dinfo->obd_name);
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ofw_bus_gen_destroy_devinfo(dinfo);
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free(dinfo, M_OFWCPU);
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continue;
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}
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device_set_ivars(cdev, dinfo);
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}
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return (bus_generic_attach(dev));
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}
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static const struct ofw_bus_devinfo *
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ofw_cpulist_get_devinfo(device_t dev, device_t child)
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{
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return (device_get_ivars(child));
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}
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static int ofw_cpu_probe(device_t);
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static int ofw_cpu_attach(device_t);
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static int ofw_cpu_read_ivar(device_t dev, device_t child, int index,
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uintptr_t *result);
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struct ofw_cpu_softc {
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struct pcpu *sc_cpu_pcpu;
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uint32_t sc_nominal_mhz;
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boolean_t sc_reg_valid;
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pcell_t sc_reg[2];
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};
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static device_method_t ofw_cpu_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ofw_cpu_probe),
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DEVMETHOD(device_attach, ofw_cpu_attach),
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/* Bus interface */
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DEVMETHOD(bus_add_child, bus_generic_add_child),
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DEVMETHOD(bus_read_ivar, ofw_cpu_read_ivar),
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DEVMETHOD(bus_setup_intr, bus_generic_setup_intr),
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DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr),
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DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource),
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DEVMETHOD(bus_release_resource, bus_generic_release_resource),
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DEVMETHOD(bus_activate_resource,bus_generic_activate_resource),
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DEVMETHOD_END
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};
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static driver_t ofw_cpu_driver = {
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"cpu",
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ofw_cpu_methods,
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sizeof(struct ofw_cpu_softc)
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};
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static devclass_t ofw_cpu_devclass;
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DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0);
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static int
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ofw_cpu_probe(device_t dev)
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{
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const char *type = ofw_bus_get_type(dev);
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if (type == NULL || strcmp(type, "cpu") != 0)
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return (ENXIO);
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/* Skip SMT CPUs, which we can't reasonably represent with this code */
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if (OF_hasprop(ofw_bus_get_node(dev), "ibm,ppc-interrupt-server#s"))
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return (ENXIO);
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device_set_desc(dev, "Open Firmware CPU");
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return (0);
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}
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static int
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ofw_cpu_attach(device_t dev)
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{
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struct ofw_cpulist_softc *psc;
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struct ofw_cpu_softc *sc;
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phandle_t node;
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pcell_t cell;
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int rv;
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sc = device_get_softc(dev);
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psc = device_get_softc(device_get_parent(dev));
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if (nitems(sc->sc_reg) < psc->sc_addr_cells) {
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if (bootverbose)
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device_printf(dev, "Too many address cells\n");
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return (EINVAL);
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}
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node = ofw_bus_get_node(dev);
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/* Read and validate the reg property for use later */
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sc->sc_reg_valid = false;
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rv = OF_getencprop(node, "reg", sc->sc_reg, sizeof(sc->sc_reg));
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if (rv < 0)
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device_printf(dev, "missing 'reg' property\n");
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else if ((rv % 4) != 0) {
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if (bootverbose)
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device_printf(dev, "Malformed reg property\n");
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} else if ((rv / 4) != psc->sc_addr_cells) {
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if (bootverbose)
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device_printf(dev, "Invalid reg size %u\n", rv);
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} else
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sc->sc_reg_valid = true;
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sc->sc_cpu_pcpu = pcpu_find(device_get_unit(dev));
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if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) < 0) {
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if (bootverbose)
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device_printf(dev,
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"missing 'clock-frequency' property\n");
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} else
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sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */
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bus_generic_probe(dev);
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return (bus_generic_attach(dev));
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}
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static int
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ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result)
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{
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struct ofw_cpulist_softc *psc;
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struct ofw_cpu_softc *sc;
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sc = device_get_softc(dev);
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switch (index) {
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case CPU_IVAR_PCPU:
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*result = (uintptr_t)sc->sc_cpu_pcpu;
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return (0);
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case CPU_IVAR_NOMINAL_MHZ:
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if (sc->sc_nominal_mhz > 0) {
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*result = (uintptr_t)sc->sc_nominal_mhz;
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return (0);
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}
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break;
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case CPU_IVAR_CPUID_SIZE:
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psc = device_get_softc(device_get_parent(dev));
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*result = psc->sc_addr_cells;
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return (0);
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case CPU_IVAR_CPUID:
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if (sc->sc_reg_valid) {
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*result = (uintptr_t)sc->sc_reg;
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return (0);
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}
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break;
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}
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return (ENOENT);
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}
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int
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ofw_cpu_early_foreach(ofw_cpu_foreach_cb callback, boolean_t only_runnable)
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{
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phandle_t node, child;
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pcell_t addr_cells, reg[2];
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char status[16];
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char device_type[16];
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u_int id, next_id;
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int count, rv;
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count = 0;
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id = 0;
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next_id = 0;
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node = OF_finddevice("/cpus");
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if (node == -1)
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return (-1);
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/* Find the number of cells in the cpu register */
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if (OF_getencprop(node, "#address-cells", &addr_cells,
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sizeof(addr_cells)) < 0)
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return (-1);
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for (child = OF_child(node); child != 0; child = OF_peer(child),
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id = next_id) {
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/* Check if child is a CPU */
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memset(device_type, 0, sizeof(device_type));
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rv = OF_getprop(child, "device_type", device_type,
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sizeof(device_type) - 1);
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if (rv < 0)
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continue;
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if (strcmp(device_type, "cpu") != 0)
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continue;
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/* We're processing CPU, update next_id used in the next iteration */
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next_id++;
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/*
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* If we are filtering by runnable then limit to only
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* those that have been enabled, or do provide a method
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* to enable them.
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*/
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if (only_runnable) {
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status[0] = '\0';
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OF_getprop(child, "status", status, sizeof(status));
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if (status[0] != '\0' && strcmp(status, "okay") != 0 &&
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strcmp(status, "ok") != 0 &&
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!OF_hasprop(child, "enable-method"))
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continue;
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}
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/*
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* Check we have a register to identify the cpu
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*/
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rv = OF_getencprop(child, "reg", reg,
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addr_cells * sizeof(cell_t));
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if (rv != addr_cells * sizeof(cell_t))
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continue;
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if (callback == NULL || callback(id, child, addr_cells, reg))
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count++;
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}
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return (only_runnable ? count : id);
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}
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