ofw_cpu.c revision 193156
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 Benno Rice ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 21 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 22 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 * 25 * $FreeBSD: head/sys/powerpc/ofw/ofw_cpu.c 193156 2009-05-31 09:01:23Z nwhitehorn $ 26 */ 27 28#include <sys/param.h> 29#include <sys/systm.h> 30#include <sys/kernel.h> 31#include <sys/module.h> 32#include <sys/malloc.h> 33#include <sys/bus.h> 34#include <sys/cpu.h> 35#include <machine/bus.h> 36 37#include <dev/ofw/openfirm.h> 38#include <dev/ofw/ofw_bus.h> 39#include <dev/ofw/ofw_bus_subr.h> 40 41static int ofw_cpulist_probe(device_t); 42static int ofw_cpulist_attach(device_t); 43static const struct ofw_bus_devinfo *ofw_cpulist_get_devinfo(device_t dev, 44 device_t child); 45 46static MALLOC_DEFINE(M_OFWCPU, "ofwcpu", "OFW CPU device information"); 47 48static device_method_t ofw_cpulist_methods[] = { 49 /* Device interface */ 50 DEVMETHOD(device_probe, ofw_cpulist_probe), 51 DEVMETHOD(device_attach, ofw_cpulist_attach), 52 53 /* Bus interface */ 54 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 55 DEVMETHOD(bus_add_child, bus_generic_add_child), 56 DEVMETHOD(bus_print_child, bus_generic_print_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 { 0, 0 } 68}; 69 70static driver_t ofw_cpulist_driver = { 71 "cpulist", 72 ofw_cpulist_methods, 73 0 74}; 75 76static devclass_t ofw_cpulist_devclass; 77 78DRIVER_MODULE(ofw_cpulist, nexus, ofw_cpulist_driver, ofw_cpulist_devclass, 79 0, 0); 80 81static int 82ofw_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 96static int 97ofw_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 126static const struct ofw_bus_devinfo * 127ofw_cpulist_get_devinfo(device_t dev, device_t child) 128{ 129 return (device_get_ivars(child)); 130} 131 132static int ofw_cpu_probe(device_t); 133static int ofw_cpu_attach(device_t); 134static int ofw_cpu_read_ivar(device_t dev, device_t child, int index, 135 uintptr_t *result); 136 137static device_method_t ofw_cpu_methods[] = { 138 /* Device interface */ 139 DEVMETHOD(device_probe, ofw_cpu_probe), 140 DEVMETHOD(device_attach, ofw_cpu_attach), 141 142 /* Bus interface */ 143 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 144 DEVMETHOD(bus_add_child, bus_generic_add_child), 145 DEVMETHOD(bus_print_child, bus_generic_print_child), 146 DEVMETHOD(bus_read_ivar, ofw_cpu_read_ivar), 147 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 148 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 149 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 150 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 151 DEVMETHOD(bus_activate_resource,bus_generic_activate_resource), 152 153 { 0, 0 } 154}; 155 156static driver_t ofw_cpu_driver = { 157 "cpu", 158 ofw_cpu_methods, 159 0 160}; 161 162static devclass_t ofw_cpu_devclass; 163 164DRIVER_MODULE(ofw_cpu, cpulist, ofw_cpu_driver, ofw_cpu_devclass, 0, 0); 165 166static int 167ofw_cpu_probe(device_t dev) 168{ 169 const char *type = ofw_bus_get_type(dev); 170 171 if (strcmp(type, "cpu") != 0) 172 return (ENXIO); 173 174 device_set_desc(dev, "Open Firmware CPU"); 175 return (0); 176} 177 178static int 179ofw_cpu_attach(device_t dev) 180{ 181 bus_generic_probe(dev); 182 return (bus_generic_attach(dev)); 183} 184 185static int 186ofw_cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 187{ 188 uint32_t cell; 189 190 switch (index) { 191 case CPU_IVAR_PCPU: 192 OF_getprop(ofw_bus_get_node(dev), "reg", &cell, sizeof(cell)); 193 *result = (uintptr_t)(pcpu_find(cell)); 194 return (0); 195 case CPU_IVAR_NOMINAL_MHZ: 196 cell = 0; 197 OF_getprop(ofw_bus_get_node(dev), "clock-frequency", 198 &cell, sizeof(cell)); 199 cell /= 1000000; /* convert to MHz */ 200 *result = (uintptr_t)(cell); 201 return (0); 202 } 203 204 return (ENOENT); 205} 206 207