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/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/module.h> 44 #include <sys/pcpu.h> 45 #include <sys/rman.h> 46 47 #include <vm/vm.h> 48 #include <vm/pmap.h> 49 50 #include <dev/ofw/ofw_bus.h> 51 #include <dev/ofw/ofw_bus_subr.h> 52 #include <dev/ofw/openfirm.h> 53 54 #include <machine/bus.h> 55 #include <machine/intr_machdep.h> 56 #include <machine/resource.h> 57 58 /* 59 * The nexus handles root-level resource allocation requests and interrupt 60 * mapping. All direct subdevices of nexus are attached by DEVICE_IDENTIFY(). 61 */ 62 63 static device_probe_t nexus_probe; 64 static device_attach_t nexus_attach; 65 static bus_setup_intr_t nexus_setup_intr; 66 static bus_teardown_intr_t nexus_teardown_intr; 67 static bus_activate_resource_t nexus_activate_resource; 68 static bus_deactivate_resource_t nexus_deactivate_resource; 69 static bus_space_tag_t nexus_get_bus_tag(device_t, device_t); 70 #ifdef SMP 71 static bus_bind_intr_t nexus_bind_intr; 72 #endif 73 static bus_config_intr_t nexus_config_intr; 74 static ofw_bus_map_intr_t nexus_ofw_map_intr; 75 76 static device_method_t nexus_methods[] = { 77 /* Device interface */ 78 DEVMETHOD(device_probe, nexus_probe), 79 DEVMETHOD(device_attach, nexus_attach), 80 81 /* Bus interface */ 82 DEVMETHOD(bus_add_child, bus_generic_add_child), 83 DEVMETHOD(bus_activate_resource, nexus_activate_resource), 84 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 85 DEVMETHOD(bus_setup_intr, nexus_setup_intr), 86 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 87 #ifdef SMP 88 DEVMETHOD(bus_bind_intr, nexus_bind_intr), 89 #endif 90 DEVMETHOD(bus_config_intr, nexus_config_intr), 91 DEVMETHOD(bus_get_bus_tag, nexus_get_bus_tag), 92 93 /* ofw_bus interface */ 94 DEVMETHOD(ofw_bus_map_intr, nexus_ofw_map_intr), 95 96 DEVMETHOD_END 97 }; 98 99 static devclass_t nexus_devclass; 100 101 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1); 102 EARLY_DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0, 103 BUS_PASS_BUS); 104 MODULE_VERSION(nexus, 1); 105 106 static int 107 nexus_probe(device_t dev) 108 { 109 110 device_quiet(dev); /* suppress attach message for neatness */ 111 112 return (BUS_PROBE_DEFAULT); 113 } 114 115 static int 116 nexus_attach(device_t dev) 117 { 118 119 bus_generic_probe(dev); 120 bus_generic_attach(dev); 121 122 return (0); 123 } 124 125 static int 126 nexus_setup_intr(device_t bus __unused, device_t child, struct resource *r, 127 int flags, driver_filter_t *filt, driver_intr_t *intr, void *arg, 128 void **cookiep) 129 { 130 int error; 131 132 if (r == NULL) 133 panic("%s: NULL interrupt resource!", __func__); 134 135 if ((rman_get_flags(r) & RF_SHAREABLE) == 0) 136 flags |= INTR_EXCL; 137 138 /* We depend here on rman_activate_resource() being idempotent. */ 139 error = rman_activate_resource(r); 140 if (error) 141 return (error); 142 143 error = powerpc_setup_intr(device_get_nameunit(child), 144 rman_get_start(r), filt, intr, arg, flags, cookiep); 145 146 return (error); 147 } 148 149 static int 150 nexus_teardown_intr(device_t bus __unused, device_t child __unused, 151 struct resource *r, void *ih) 152 { 153 154 if (r == NULL) 155 return (EINVAL); 156 157 return (powerpc_teardown_intr(ih)); 158 } 159 160 static bus_space_tag_t 161 nexus_get_bus_tag(device_t bus __unused, device_t child __unused) 162 { 163 164 return(&bs_be_tag); 165 } 166 167 #ifdef SMP 168 static int 169 nexus_bind_intr(device_t bus __unused, device_t child __unused, 170 struct resource *r, int cpu) 171 { 172 173 return (powerpc_bind_intr(rman_get_start(r), cpu)); 174 } 175 #endif 176 177 static int 178 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 179 enum intr_polarity pol) 180 { 181 182 return (powerpc_config_intr(irq, trig, pol)); 183 } 184 185 static int 186 nexus_ofw_map_intr(device_t dev, device_t child, phandle_t iparent, int icells, 187 pcell_t *irq) 188 { 189 u_int intr = MAP_IRQ(iparent, irq[0]); 190 if (icells > 1) 191 powerpc_fw_config_intr(intr, irq[1]); 192 return (intr); 193 } 194 195 static int 196 nexus_activate_resource(device_t bus __unused, device_t child __unused, 197 int type, int rid __unused, struct resource *r) 198 { 199 200 if (type == SYS_RES_MEMORY) { 201 vm_paddr_t start; 202 void *p; 203 204 start = (vm_paddr_t) rman_get_start(r); 205 if (bootverbose) 206 printf("nexus mapdev: start %jx, len %jd\n", 207 (uintmax_t)start, rman_get_size(r)); 208 209 p = pmap_mapdev(start, (vm_size_t) rman_get_size(r)); 210 if (p == NULL) 211 return (ENOMEM); 212 rman_set_virtual(r, p); 213 rman_set_bustag(r, &bs_be_tag); 214 rman_set_bushandle(r, (u_long)p); 215 } 216 return (rman_activate_resource(r)); 217 } 218 219 static int 220 nexus_deactivate_resource(device_t bus __unused, device_t child __unused, 221 int type __unused, int rid __unused, struct resource *r) 222 { 223 224 /* 225 * If this is a memory resource, unmap it. 226 */ 227 if ((type == SYS_RES_MEMORY) || (type == SYS_RES_IOPORT)) { 228 bus_size_t psize; 229 230 psize = rman_get_size(r); 231 pmap_unmapdev((vm_offset_t)rman_get_virtual(r), psize); 232 } 233 234 return (rman_deactivate_resource(r)); 235 } 236 237