1 /*- 2 * Copyright 1998 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/i386/i386/legacy.c,v 1.63.2.1.4.1 2009/04/15 03:14:26 kensmith Exp $ 30 */ 31 32 /* 33 * This code implements a system driver for legacy systems that do not 34 * support ACPI or when ACPI support is not present in the kernel. 35 */ 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/bus.h> 40 #include <sys/kernel.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/rman.h> 44 45 #undef DEV_MCA 46 #ifdef DEV_MCA 47 #include <i386/bios/mca_machdep.h> 48 #endif 49 50 #include "legacyvar.h" 51 52 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device"); 53 struct legacy_device { 54 int lg_pcibus; 55 }; 56 57 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev)) 58 59 static int legacy_identify(driver_t *, device_t); 60 static int legacy_probe(device_t); 61 static int legacy_attach(device_t); 62 static int legacy_print_child(device_t, device_t); 63 static device_t legacy_add_child(device_t, device_t, int, const char *, int); 64 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *); 65 static int legacy_write_ivar(device_t, device_t, int, uintptr_t); 66 67 static device_method_t legacy_methods[] = { 68 /* Device interface */ 69 DEVMETHOD(device_identify, legacy_identify), 70 DEVMETHOD(device_probe, legacy_probe), 71 DEVMETHOD(device_attach, legacy_attach), 72 DEVMETHOD(device_detach, bus_generic_detach), 73 DEVMETHOD(device_shutdown, bus_generic_shutdown), 74 DEVMETHOD(device_suspend, bus_generic_suspend), 75 DEVMETHOD(device_resume, bus_generic_resume), 76 77 /* Bus interface */ 78 DEVMETHOD(bus_print_child, legacy_print_child), 79 DEVMETHOD(bus_add_child, legacy_add_child), 80 DEVMETHOD(bus_read_ivar, legacy_read_ivar), 81 DEVMETHOD(bus_write_ivar, legacy_write_ivar), 82 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 83 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 84 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 85 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 86 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 87 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 88 89 { 0, 0 } 90 }; 91 92 static driver_t legacy_driver = { 93 "legacy", 94 legacy_methods, 95 1, /* no softc */ 96 }; 97 static devclass_t legacy_devclass; 98 99 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0); 100 101 static int 102 legacy_identify(driver_t *driver, device_t parent) 103 { 104 /* 105 * Basically a static device, there's no point reinstalling it 106 * on rescan. 107 */ 108 if (device_get_state(parent) == DS_ATTACHED) 109 return (0); 110 if (device_get_state(parent) == DS_INPROGRESS) 111 return (0); 112 113 /* 114 * Add child device with order of 11 so it gets probed 115 * after ACPI (which is at order 10). 116 */ 117 if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL) 118 panic("legacy: could not attach"); 119 return (0); 120 } 121 122 static int 123 legacy_probe(device_t dev) 124 { 125 #ifdef ACPI_ENABLE_PCI 126 device_t acpi; 127 128 /* 129 * Fail to probe if ACPI is ok. 130 */ 131 acpi = devclass_get_device(devclass_find("acpi"), 0); 132 if (acpi != NULL && device_is_alive(acpi)) 133 return (ENXIO); 134 #endif /* ACPI_ENABLE_PCI */ 135 device_set_desc(dev, "legacy system"); 136 device_quiet(dev); 137 return (0); 138 } 139 140 static int 141 legacy_attach(device_t dev) 142 { 143 device_t child; 144 145 /* 146 * Let our child drivers identify any child devices that they 147 * can find. Once that is done attach any devices that we 148 * found. 149 */ 150 bus_generic_probe(dev); 151 bus_generic_attach(dev); 152 153 /* 154 * If we didn't see EISA or ISA on a pci bridge, create some 155 * connection points now so they show up "on motherboard". 156 */ 157 if (!devclass_get_device(devclass_find("eisa"), 0)) { 158 child = BUS_ADD_CHILD(dev, dev, 0, "eisa", 0); 159 if (child == NULL) 160 panic("legacy_attach eisa"); 161 device_probe_and_attach(child); 162 } 163 #ifdef DEV_MCA 164 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) { 165 child = BUS_ADD_CHILD(dev, dev, 0, "mca", 0); 166 if (child == 0) 167 panic("legacy_probe mca"); 168 device_probe_and_attach(child); 169 } 170 #endif 171 if (!devclass_get_device(devclass_find("isa"), 0)) { 172 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0); 173 if (child == NULL) 174 panic("legacy_attach isa"); 175 device_probe_and_attach(child); 176 } 177 178 return 0; 179 } 180 181 static int 182 legacy_print_child(device_t bus, device_t child) 183 { 184 struct legacy_device *atdev = DEVTOAT(child); 185 int retval = 0; 186 187 retval += bus_print_child_header(bus, child); 188 if (atdev->lg_pcibus != -1) 189 retval += kprintf(" pcibus %d", atdev->lg_pcibus); 190 retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */ 191 192 return (retval); 193 } 194 195 static device_t 196 legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 197 { 198 device_t child; 199 struct legacy_device *atdev; 200 atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV, 201 M_NOWAIT | M_ZERO); 202 if (atdev == NULL) 203 return(NULL); 204 atdev->lg_pcibus = -1; 205 206 child = device_add_child_ordered(bus, order, name, unit); 207 if (child == NULL) { 208 kfree(atdev, M_LEGACYDEV); 209 } 210 else { 211 /* should we kfree this in legacy_child_detached? */ 212 device_set_ivars(child, atdev); 213 } 214 return (child); 215 } 216 217 static int 218 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 219 { 220 struct legacy_device *atdev = DEVTOAT(child); 221 222 switch (which) { 223 case LEGACY_IVAR_PCIDOMAIN: 224 *result = 0; 225 break; 226 case LEGACY_IVAR_PCIBUS: 227 *result = atdev->lg_pcibus; 228 break; 229 default: 230 return ENOENT; 231 } 232 return 0; 233 } 234 235 static int 236 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 237 { 238 struct legacy_device *atdev = DEVTOAT(child); 239 240 switch (which) { 241 case LEGACY_IVAR_PCIDOMAIN: 242 return EINVAL; 243 case LEGACY_IVAR_PCIBUS: 244 atdev->lg_pcibus = value; 245 break; 246 default: 247 return ENOENT; 248 } 249 return 0; 250 } 251 252 #ifdef notyet 253 /* 254 * Legacy CPU attachment when ACPI is not available. Drivers like 255 * cpufreq(4) hang off this. 256 */ 257 static void cpu_identify(driver_t *driver, device_t parent); 258 static int cpu_read_ivar(device_t dev, device_t child, int index, 259 uintptr_t *result); 260 static device_t cpu_add_child(device_t bus, int order, const char *name, 261 int unit); 262 static struct resource_list *cpu_get_rlist(device_t dev, device_t child); 263 264 struct cpu_device { 265 struct resource_list cd_rl; 266 struct pcpu *cd_pcpu; 267 }; 268 269 static device_method_t cpu_methods[] = { 270 /* Device interface */ 271 DEVMETHOD(device_identify, cpu_identify), 272 DEVMETHOD(device_probe, bus_generic_probe), 273 DEVMETHOD(device_attach, bus_generic_attach), 274 DEVMETHOD(device_detach, bus_generic_detach), 275 DEVMETHOD(device_shutdown, bus_generic_shutdown), 276 DEVMETHOD(device_suspend, bus_generic_suspend), 277 DEVMETHOD(device_resume, bus_generic_resume), 278 279 /* Bus interface */ 280 DEVMETHOD(bus_add_child, cpu_add_child), 281 DEVMETHOD(bus_read_ivar, cpu_read_ivar), 282 DEVMETHOD(bus_print_child, bus_generic_print_child), 283 DEVMETHOD(bus_get_resource_list, cpu_get_rlist), 284 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 285 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 286 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 287 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 288 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 289 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 290 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 291 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 292 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 293 294 { 0, 0 } 295 }; 296 297 static driver_t cpu_driver = { 298 "cpu", 299 cpu_methods, 300 1, /* no softc */ 301 }; 302 static devclass_t cpu_devclass; 303 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0); 304 305 static void 306 cpu_identify(driver_t *driver, device_t parent) 307 { 308 device_t child; 309 int i; 310 311 /* 312 * Attach a cpuX device for each CPU. We use an order of 150 313 * so that these devices are attached after the Host-PCI 314 * bridges (which are added at order 100). 315 */ 316 for (i = 0; i <= mp_maxid; i++) 317 if (!CPU_ABSENT(i)) { 318 child = BUS_ADD_CHILD(parent, 150, "cpu", i); 319 if (child == NULL) 320 panic("legacy_attach cpu"); 321 } 322 } 323 324 static device_t 325 cpu_add_child(device_t bus, int order, const char *name, int unit) 326 { 327 struct cpu_device *cd; 328 device_t child; 329 struct pcpu *pc; 330 331 if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) 332 return (NULL); 333 334 resource_list_init(&cd->cd_rl); 335 pc = pcpu_find(device_get_unit(bus)); 336 cd->cd_pcpu = pc; 337 338 child = device_add_child_ordered(bus, order, name, unit); 339 if (child != NULL) { 340 pc->pc_device = child; 341 device_set_ivars(child, cd); 342 } else 343 kfree(cd, M_DEVBUF); 344 return (child); 345 } 346 347 static struct resource_list * 348 cpu_get_rlist(device_t dev, device_t child) 349 { 350 struct cpu_device *cpdev; 351 352 cpdev = device_get_ivars(child); 353 return (&cpdev->cd_rl); 354 } 355 356 static int 357 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 358 { 359 struct cpu_device *cpdev; 360 361 if (index != CPU_IVAR_PCPU) 362 return (ENOENT); 363 cpdev = device_get_ivars(child); 364 *result = (uintptr_t)cpdev->cd_pcpu; 365 return (0); 366 } 367 #endif 368