1 /*- 2 * Copyright (C) 2009 Nathan Whitehorn 3 * Copyright (C) 2015 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * Portions of this software were developed by Andrew Turner 7 * under sponsorship from the FreeBSD Foundation. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/kernel.h> 37 #include <sys/module.h> 38 #include <sys/malloc.h> 39 #include <sys/bus.h> 40 #include <sys/cpu.h> 41 #include <machine/bus.h> 42 43 #include <dev/ofw/openfirm.h> 44 #include <dev/ofw/ofw_bus.h> 45 #include <dev/ofw/ofw_bus_subr.h> 46 47 static int ofw_cpulist_probe(device_t); 48 static int ofw_cpulist_attach(device_t); 49 static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev, 50 device_t child); 51 52 static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information"); 53 54 struct ofw_cpulist_softc { 55 pcell_t sc_addr_cells; 56 }; 57 58 static device_method_t ofw_cpulist_methods[] = { 59 /* Device interface */ 60 DEVMETHOD(device_probe, ofw_cpulist_probe), 61 DEVMETHOD(device_attach, ofw_cpulist_attach), 62 63 /* Bus interface */ 64 DEVMETHOD(bus_add_child, bus_generic_add_child), 65 DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str), 66 67 /* ofw_bus interface */ 68 DEVMETHOD(ofw_bus_get_devinfo, ofw_cpulist_get_devinfo), 69 DEVMETHOD(ofw_bus_get_compat, ofw_bus_gen_get_compat), 70 DEVMETHOD(ofw_bus_get_model, ofw_bus_gen_get_model), 71 DEVMETHOD(ofw_bus_get_name, ofw_bus_gen_get_name), 72 DEVMETHOD(ofw_bus_get_node, ofw_bus_gen_get_node), 73 DEVMETHOD(ofw_bus_get_type, ofw_bus_gen_get_type), 74 75 DEVMETHOD_END 76 }; 77 78 static driver_t ofw_cpulist_driver = { 79 "cpulist", 80 ofw_cpulist_methods, 81 sizeof(struct ofw_cpulist_softc) 82 }; 83 84 static devclass_t ofw_cpulist_devclass; 85 86 DRIVER_MODULE(ofw_cpulist, ofwbus, ofw_cpulist_driver, ofw_cpulist_devclass, 87 0, 0); 88 89 static int 90 ofw_cpulist_probe(device_t dev) 91 { 92 const char *name; 93 94 name = ofw_bus_get_name(dev); 95 96 if (name == NULL || strcmp(name, "cpus") != 0) 97 return (ENXIO); 98 99 device_set_desc(dev, "Open Firmware CPU Group"); 100 101 return (0); 102 } 103 104 static int 105 ofw_cpulist_attach(device_t dev) 106 { 107 struct ofw_cpulist_softc *sc; 108 phandle_t root, child; 109 device_t cdev; 110 struct ofw_bus_devinfo *dinfo; 111 112 sc = device_get_softc(dev); 113 root = ofw_bus_get_node(dev); 114 115 sc->sc_addr_cells = 1; 116 OF_getencprop(root, "#address-cells", &sc->sc_addr_cells, 117 sizeof(sc->sc_addr_cells)); 118 119 for (child = OF_child(root); child != 0; child = OF_peer(child)) { 120 dinfo = malloc(sizeof(*dinfo), M_OFWCPU, M_WAITOK | M_ZERO); 121 122 if (ofw_bus_gen_setup_devinfo(dinfo, child) != 0) { 123 free(dinfo, M_OFWCPU); 124 continue; 125 } 126 cdev = device_add_child(dev, NULL, -1); 127 if (cdev == NULL) { 128 device_printf(dev, "<%s>: device_add_child failed\n", 129 dinfo->obd_name); 130 ofw_bus_gen_destroy_devinfo(dinfo); 131 free(dinfo, M_OFWCPU); 132 continue; 133 } 134 device_set_ivars(cdev, dinfo); 135 } 136 137 return (bus_generic_attach(dev)); 138 } 139 140 static const struct ofw_bus_devinfo * 141 ofw_cpulist_get_devinfo(device_t dev, device_t child) 142 { 143 return (device_get_ivars(child)); 144 } 145 146 static int ofw_cpu_probe(device_t); 147 static int ofw_cpu_attach(device_t); 148 static int ofw_cpu_read_ivar(device_t dev, device_t child, int index, 149 uintptr_t *result); 150 151 struct ofw_cpu_softc { 152 struct pcpu *sc_cpu_pcpu; 153 uint32_t sc_nominal_mhz; 154 boolean_t sc_reg_valid; 155 pcell_t sc_reg[2]; 156 }; 157 158 static device_method_t ofw_cpu_methods[] = { 159 /* Device interface */ 160 DEVMETHOD(device_probe, ofw_cpu_probe), 161 DEVMETHOD(device_attach, ofw_cpu_attach), 162 163 /* Bus interface */ 164 DEVMETHOD(bus_add_child, bus_generic_add_child), 165 DEVMETHOD(bus_read_ivar, ofw_cpu_read_ivar), 166 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 167 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 168 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 169 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 170 DEVMETHOD(bus_activate_resource,bus_generic_activate_resource), 171 172 DEVMETHOD_END 173 }; 174 175 static driver_t ofw_cpu_driver = { 176 "cpu", 177 ofw_cpu_methods, 178 sizeof(struct ofw_cpu_softc) 179 }; 180 181 static devclass_t ofw_cpu_devclass; 182 183 DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0); 184 185 static int 186 ofw_cpu_probe(device_t dev) 187 { 188 const char *type = ofw_bus_get_type(dev); 189 190 if (type == NULL || strcmp(type, "cpu") != 0) 191 return (ENXIO); 192 193 device_set_desc(dev, "Open Firmware CPU"); 194 return (0); 195 } 196 197 static int 198 ofw_cpu_attach(device_t dev) 199 { 200 struct ofw_cpulist_softc *psc; 201 struct ofw_cpu_softc *sc; 202 phandle_t node; 203 pcell_t cell; 204 int rv; 205 206 sc = device_get_softc(dev); 207 psc = device_get_softc(device_get_parent(dev)); 208 209 if (nitems(sc->sc_reg) < psc->sc_addr_cells) { 210 if (bootverbose) 211 device_printf(dev, "Too many address cells\n"); 212 return (EINVAL); 213 } 214 215 node = ofw_bus_get_node(dev); 216 217 /* Read and validate the reg property for use later */ 218 sc->sc_reg_valid = false; 219 rv = OF_getencprop(node, "reg", sc->sc_reg, sizeof(sc->sc_reg)); 220 if (rv < 0) 221 device_printf(dev, "missing 'reg' property\n"); 222 else if ((rv % 4) != 0) { 223 if (bootverbose) 224 device_printf(dev, "Malformed reg property\n"); 225 } else if ((rv / 4) != psc->sc_addr_cells) { 226 if (bootverbose) 227 device_printf(dev, "Invalid reg size %u\n", rv); 228 } else 229 sc->sc_reg_valid = true; 230 231 sc->sc_cpu_pcpu = pcpu_find(device_get_unit(dev)); 232 233 if (OF_getencprop(node, "clock-frequency", &cell, sizeof(cell)) < 0) { 234 if (bootverbose) 235 device_printf(dev, 236 "missing 'clock-frequency' property\n"); 237 } else 238 sc->sc_nominal_mhz = cell / 1000000; /* convert to MHz */ 239 240 bus_generic_probe(dev); 241 return (bus_generic_attach(dev)); 242 } 243 244 static int 245 ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 246 { 247 struct ofw_cpu_softc *sc; 248 249 sc = device_get_softc(dev); 250 251 switch (index) { 252 case CPU_IVAR_PCPU: 253 *result = (uintptr_t)sc->sc_cpu_pcpu; 254 return (0); 255 case CPU_IVAR_NOMINAL_MHZ: 256 if (sc->sc_nominal_mhz > 0) { 257 *result = (uintptr_t)sc->sc_nominal_mhz; 258 return (0); 259 } 260 break; 261 } 262 263 return (ENOENT); 264 } 265 266