1 /*- 2 * Copyright (C) 2009 Nathan Whitehorn 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/module.h> 34 #include <sys/malloc.h> 35 #include <sys/bus.h> 36 #include <sys/cpu.h> 37 #include <machine/bus.h> 38 39 #include <dev/ofw/openfirm.h> 40 #include <dev/ofw/ofw_bus.h> 41 #include <dev/ofw/ofw_bus_subr.h> 42 43 static int ofw_cpulist_probe(device_t); 44 static int ofw_cpulist_attach(device_t); 45 static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev, 46 device_t child); 47 48 static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information"); 49 50 static device_method_t ofw_cpulist_methods[] = { 51 /* Device interface */ 52 DEVMETHOD(device_probe, ofw_cpulist_probe), 53 DEVMETHOD(device_attach, ofw_cpulist_attach), 54 55 /* Bus interface */ 56 DEVMETHOD(bus_add_child, bus_generic_add_child), 57 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 58 59 /* ofw_bus interface */ 60 DEVMETHOD(ofw_bus_get_devinfo, ofw_cpulist_get_devinfo), 61 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 62 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 63 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 64 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 65 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 66 67 DEVMETHOD_END 68 }; 69 70 static driver_t ofw_cpulist_driver = { 71 "cpulist", 72 ofw_cpulist_methods, 73 0 74 }; 75 76 static devclass_t ofw_cpulist_devclass; 77 78 DRIVER_MODULE(ofw_cpulist, ofwbus, ofw_cpulist_driver, ofw_cpulist_devclass, 79 0, 0); 80 81 static int 82 ofw_cpulist_probe(device_t dev) 83 { 84 const char *name; 85 86 name = ofw_bus_get_name(dev); 87 88 if (name == NULL || strcmp(name, "cpus") != 0) 89 return (ENXIO); 90 91 device_set_desc(dev, "Open Firmware CPU Group"); 92 93 return (0); 94 } 95 96 static int 97 ofw_cpulist_attach(device_t dev) 98 { 99 phandle_t root, child; 100 device_t cdev; 101 struct ofw_bus_devinfo *dinfo; 102 103 root = ofw_bus_get_node(dev); 104 105 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 106 dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO); 107 108 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 109 free(dinfo, M_OFWCPU); 110 continue; 111 } 112 cdev = device_add_child(dev, NULL, -1); 113 if (cdev == NULL) { 114 device_printf(dev, "<%s>: device_add_child failed\n", 115 dinfo->obd_name); 116 ofw_bus_gen_destroy_devinfo(dinfo); 117 free(dinfo, M_OFWCPU); 118 continue; 119 } 120 device_set_ivars(cdev, dinfo); 121 } 122 123 return (bus_generic_attach(dev)); 124 } 125 126 static const struct ofw_bus_devinfo * 127 ofw_cpulist_get_devinfo(device_t dev, device_t child) 128 { 129 return (device_get_ivars(child)); 130 } 131 132 static int ofw_cpu_probe(device_t); 133 static int ofw_cpu_attach(device_t); 134 static int ofw_cpu_read_ivar(device_t dev, device_t child, int index, 135 uintptr_t *result); 136 137 struct ofw_cpu_softc { 138 struct pcpu *sc_cpu_pcpu; 139 uint32_t sc_nominal_mhz; 140 }; 141 142 static device_method_t ofw_cpu_methods[] = { 143 /* Device interface */ 144 DEVMETHOD(device_probe, ofw_cpu_probe), 145 DEVMETHOD(device_attach, ofw_cpu_attach), 146 147 /* Bus interface */ 148 DEVMETHOD(bus_add_child, bus_generic_add_child), 149 DEVMETHOD(bus_read_ivar, ofw_cpu_read_ivar), 150 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 151 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 152 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 153 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 154 DEVMETHOD(bus_activate_resource,bus_generic_activate_resource), 155 156 DEVMETHOD_END 157 }; 158 159 static driver_t ofw_cpu_driver = { 160 "cpu", 161 ofw_cpu_methods, 162 sizeof(struct ofw_cpu_softc) 163 }; 164 165 static devclass_t ofw_cpu_devclass; 166 167 DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0); 168 169 static int 170 ofw_cpu_probe(device_t dev) 171 { 172 const char *type = ofw_bus_get_type(dev); 173 174 if (type == NULL || strcmp(type, "cpu") != 0) 175 return (ENXIO); 176 177 device_set_desc(dev, "Open Firmware CPU"); 178 return (0); 179 } 180 181 static int 182 ofw_cpu_attach(device_t dev) 183 { 184 struct ofw_cpu_softc *sc; 185 phandle_t node; 186 uint32_t cell; 187 188 sc = device_get_softc(dev); 189 node = ofw_bus_get_node(dev); 190 if (OF_getencprop(node, "reg", &cell, sizeof(cell)) < 0) { 191 cell = device_get_unit(dev); 192 device_printf(dev, "missing 'reg' property, using %u\n", cell); 193 } 194 sc->sc_cpu_pcpu = pcpu_find(cell); 195 if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) < 0) { 196 device_printf(dev, "missing 'clock-frequency' property\n"); 197 return (ENXIO); 198 } 199 sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */ 200 201 bus_generic_probe(dev); 202 return (bus_generic_attach(dev)); 203 } 204 205 static int 206 ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 207 { 208 struct ofw_cpu_softc *sc; 209 210 sc = device_get_softc(dev); 211 212 switch (index) { 213 case CPU_IVAR_PCPU: 214 *result = (uintptr_t)sc->sc_cpu_pcpu; 215 return (0); 216 case CPU_IVAR_NOMINAL_MHZ: 217 *result = (uintptr_t)sc->sc_nominal_mhz; 218 return (0); 219 } 220 221 return (ENOENT); 222 } 223 224