1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * Copyright 2001 by Thomas Moestl <tmm@FreeBSD.org>. 4 * Copyright 2006 by Marius Strobl <marius@FreeBSD.org>. 5 * All rights reserved. 6 * 7 * Permission to use, copy, modify, and distribute this software and 8 * its documentation for any purpose and without fee is hereby 9 * granted, provided that both the above copyright notice and this 10 * permission notice appear in all copies, that both the above 11 * copyright notice and this permission notice appear in all 12 * supporting documentation, and that the name of M.I.T. not be used 13 * in advertising or publicity pertaining to distribution of the 14 * software without specific, written prior permission. M.I.T. makes 15 * no representations about the suitability of this software for any 16 * purpose. It is provided "as is" without express or implied 17 * warranty. 18 * 19 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 20 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 21 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 22 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 23 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 26 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 27 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 28 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 29 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: FreeBSD: src/sys/i386/i386/nexus.c,v 1.43 2001/02/09 33 */ 34 35 #include <sys/cdefs.h> 36 __FBSDID("$FreeBSD$"); 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/bus.h> 41 #include <sys/kdb.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/module.h> 45 #include <sys/pcpu.h> 46 #include <sys/rman.h> 47 #include <sys/smp.h> 48 49 #include <vm/vm.h> 50 #include <vm/pmap.h> 51 52 #include <dev/ofw/ofw_bus.h> 53 #include <dev/ofw/ofw_bus_subr.h> 54 #include <dev/ofw/openfirm.h> 55 56 #include <machine/bus.h> 57 #include <machine/intr_machdep.h> 58 #include <machine/resource.h> 59 60 /* 61 * The nexus handles root-level resource allocation requests and interrupt 62 * mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY(). 63 */ 64 65 static device_probe_t nexus_probe; 66 static device_attach_t nexus_attach; 67 static bus_setup_intr_t nexus_setup_intr; 68 static bus_teardown_intr_t nexus_teardown_intr; 69 static bus_activate_resource_t nexus_activate_resource; 70 static bus_deactivate_resource_t nexus_deactivate_resource; 71 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); 72 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t, 73 cpuset_t *); 74 #ifdef SMP 75 static bus_bind_intr_t nexus_bind_intr; 76 #endif 77 static bus_config_intr_t nexus_config_intr; 78 static ofw_bus_map_intr_t nexus_ofw_map_intr; 79 80 static device_method_t nexus_methods[] = { 81 /* Device interface */ 82 DEVMETHOD(device_probe, nexus_probe), 83 DEVMETHOD(device_attach, nexus_attach), 84 85 /* Bus interface */ 86 DEVMETHOD(bus_add_child, bus_generic_add_child), 87 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 88 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 89 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 90 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 91 #ifdef SMP 92 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 93 #endif 94 DEVMETHOD(bus_config_intr, nexus_config_intr), 95 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), 96 DEVMETHOD(bus_get_cpus, nexus_get_cpus), 97 98 /* ofw_bus interface */ 99 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), 100 101 DEVMETHOD_END 102 }; 103 104 static devclass_t nexus_devclass; 105 106 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 107 EARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0, 108 BUS_PASS_BUS); 109 MODULE_VERSION(nexus, 1); 110 111 static int 112 nexus_probe(device_t dev) 113 { 114 115 device_quiet(dev); /* suppress attach message for neatness */ 116 117 return (BUS_PROBE_DEFAULT); 118 } 119 120 static int 121 nexus_attach(device_t dev) 122 { 123 124 bus_generic_probe(dev); 125 bus_generic_attach(dev); 126 127 return (0); 128 } 129 130 static int 131 nexus_setup_intr(device_t bus __unused, device_t child, struct resource *r, 132 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, 133 void **cookiep) 134 { 135 int error, domain; 136 137 if (r == NULL) 138 panic("%s: NULL interrupt resource!", __func__); 139 140 if (cookiep != NULL) 141 *cookiep = NULL; 142 if ((rman_get_flags(r) & RF_SHAREABLE) == 0) 143 flags |= INTR_EXCL; 144 145 /* We depend here on rman_activate_resource() being idempotent. */ 146 error = rman_activate_resource(r); 147 if (error) 148 return (error); 149 150 if (bus_get_domain(child, &domain) != 0) { 151 if(bootverbose) 152 device_printf(child, "no domain found\n"); 153 domain = 0; 154 } 155 error = powerpc_setup_intr(device_get_nameunit(child), 156 rman_get_start(r), filt, intr, arg, flags, cookiep, domain); 157 158 return (error); 159 } 160 161 static int 162 nexus_teardown_intr(device_t bus __unused, device_t child __unused, 163 struct resource *r, void *ih) 164 { 165 166 if (r == NULL) 167 return (EINVAL); 168 169 return (powerpc_teardown_intr(ih)); 170 } 171 172 static bus_space_tag_t 173 nexus_get_bus_tag(device_t bus __unused, device_t child __unused) 174 { 175 176 return(&bs_be_tag); 177 } 178 179 static int 180 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize, 181 cpuset_t *cpuset) 182 { 183 184 switch (op) { 185 #ifdef SMP 186 case INTR_CPUS: 187 if (setsize != sizeof(cpuset_t)) 188 return (EINVAL); 189 *cpuset = all_cpus; 190 return (0); 191 #endif 192 default: 193 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset)); 194 } 195 } 196 197 #ifdef SMP 198 static int 199 nexus_bind_intr(device_t bus __unused, device_t child __unused, 200 struct resource *r, int cpu) 201 { 202 203 return (powerpc_bind_intr(rman_get_start(r), cpu)); 204 } 205 #endif 206 207 static int 208 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 209 enum intr_polarity pol) 210 { 211 212 return (powerpc_config_intr(irq, trig, pol)); 213 } 214 215 static int 216 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, 217 pcell_t *irq) 218 { 219 u_int intr = MAP_IRQ(iparent, irq[0]); 220 if (icells > 1) 221 powerpc_fw_config_intr(intr, irq[1]); 222 return (intr); 223 } 224 225 static int 226 nexus_activate_resource(device_t bus __unused, device_t child __unused, 227 int type, int rid __unused, struct resource *r) 228 { 229 230 if (type == SYS_RES_MEMORY) { 231 vm_paddr_t start; 232 void *p; 233 234 start = (vm_paddr_t) rman_get_start(r); 235 if (bootverbose) 236 printf("nexus mapdev: start %jx, len %jd\n", 237 (uintmax_t)start, rman_get_size(r)); 238 239 p = pmap_mapdev(start, (vm_size_t) rman_get_size(r)); 240 if (p == NULL) 241 return (ENOMEM); 242 rman_set_virtual(r, p); 243 rman_set_bustag(r, &bs_be_tag); 244 rman_set_bushandle(r, (u_long)p); 245 } 246 return (rman_activate_resource(r)); 247 } 248 249 static int 250 nexus_deactivate_resource(device_t bus __unused, device_t child __unused, 251 int type __unused, int rid __unused, struct resource *r) 252 { 253 254 /* 255 * If this is a memory resource, unmap it. 256 */ 257 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 258 bus_size_t psize; 259 260 psize = rman_get_size(r); 261 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); 262 } 263 264 return (rman_deactivate_resource(r)); 265 } 266 267