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 #include "legacyvar.h" 46 47 static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device"); 48 struct legacy_device { 49 int lg_pcibus; 50 }; 51 52 #define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev)) 53 54 static int legacy_identify(driver_t *, device_t); 55 static int legacy_probe(device_t); 56 static int legacy_attach(device_t); 57 static int legacy_print_child(device_t, device_t); 58 static device_t legacy_add_child(device_t, device_t, int, const char *, int); 59 static int legacy_read_ivar(device_t, device_t, int, uintptr_t *); 60 static int legacy_write_ivar(device_t, device_t, int, uintptr_t); 61 62 static device_method_t legacy_methods[] = { 63 /* Device interface */ 64 DEVMETHOD(device_identify, legacy_identify), 65 DEVMETHOD(device_probe, legacy_probe), 66 DEVMETHOD(device_attach, legacy_attach), 67 DEVMETHOD(device_detach, bus_generic_detach), 68 DEVMETHOD(device_shutdown, bus_generic_shutdown), 69 DEVMETHOD(device_suspend, bus_generic_suspend), 70 DEVMETHOD(device_resume, bus_generic_resume), 71 72 /* Bus interface */ 73 DEVMETHOD(bus_print_child, legacy_print_child), 74 DEVMETHOD(bus_add_child, legacy_add_child), 75 DEVMETHOD(bus_read_ivar, legacy_read_ivar), 76 DEVMETHOD(bus_write_ivar, legacy_write_ivar), 77 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 78 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 79 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 80 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 81 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 82 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 83 84 DEVMETHOD_END 85 }; 86 87 static driver_t legacy_driver = { 88 "legacy", 89 legacy_methods, 90 1, /* no softc */ 91 }; 92 static devclass_t legacy_devclass; 93 94 DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, NULL, NULL); 95 96 static int 97 legacy_identify(driver_t *driver, device_t parent) 98 { 99 /* 100 * Basically a static device, there's no point reinstalling it 101 * on rescan. 102 */ 103 if (device_get_state(parent) == DS_ATTACHED) 104 return (0); 105 if (device_get_state(parent) == DS_INPROGRESS) 106 return (0); 107 108 /* 109 * Add child device with order of 11 so it gets probed 110 * after ACPI (which is at order 10). 111 */ 112 if (BUS_ADD_CHILD(parent, parent, 11, "legacy", 0) == NULL) 113 panic("legacy: could not attach"); 114 return (0); 115 } 116 117 static int 118 legacy_probe(device_t dev) 119 { 120 #if 0 /* ACPI_ENABLE_PCI */ 121 device_t acpi; 122 123 /* 124 * Fail to probe if ACPI is ok. 125 */ 126 acpi = devclass_get_device(devclass_find("acpi"), 0); 127 if (acpi != NULL && device_is_alive(acpi)) 128 return (ENXIO); 129 #endif /* ACPI_ENABLE_PCI */ 130 device_set_desc(dev, "legacy system"); 131 device_quiet(dev); 132 return (0); 133 } 134 135 static int 136 legacy_attach(device_t dev) 137 { 138 device_t child; 139 140 /* 141 * Let our child drivers identify any child devices that they 142 * can find. Once that is done attach any devices that we 143 * found. 144 */ 145 bus_generic_probe(dev); 146 bus_generic_attach(dev); 147 148 /* 149 * If we didn't see ISA on a pci bridge, create a 150 * connection point now so it shows up "on motherboard". 151 */ 152 if (!devclass_get_device(devclass_find("isa"), 0)) { 153 child = BUS_ADD_CHILD(dev, dev, 0, "isa", 0); 154 if (child == NULL) 155 panic("legacy_attach isa"); 156 device_probe_and_attach(child); 157 } 158 159 return 0; 160 } 161 162 static int 163 legacy_print_child(device_t bus, device_t child) 164 { 165 struct legacy_device *atdev = DEVTOAT(child); 166 int retval = 0; 167 168 retval += bus_print_child_header(bus, child); 169 if (atdev->lg_pcibus != -1) 170 retval += kprintf(" pcibus %d", atdev->lg_pcibus); 171 retval += kprintf(" on motherboard\n"); /* XXX "motherboard", ick */ 172 173 return (retval); 174 } 175 176 static device_t 177 legacy_add_child(device_t bus, device_t parent, int order, const char *name, int unit) 178 { 179 device_t child; 180 struct legacy_device *atdev; 181 atdev = kmalloc(sizeof(struct legacy_device), M_LEGACYDEV, 182 M_NOWAIT | M_ZERO); 183 if (atdev == NULL) 184 return(NULL); 185 atdev->lg_pcibus = -1; 186 187 child = device_add_child_ordered(bus, order, name, unit); 188 if (child == NULL) { 189 kfree(atdev, M_LEGACYDEV); 190 } 191 else { 192 /* should we kfree this in legacy_child_detached? */ 193 device_set_ivars(child, atdev); 194 } 195 return (child); 196 } 197 198 static int 199 legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 200 { 201 struct legacy_device *atdev = DEVTOAT(child); 202 203 switch (which) { 204 case LEGACY_IVAR_PCIDOMAIN: 205 *result = 0; 206 break; 207 case LEGACY_IVAR_PCIBUS: 208 *result = atdev->lg_pcibus; 209 break; 210 default: 211 return ENOENT; 212 } 213 return 0; 214 } 215 216 static int 217 legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 218 { 219 struct legacy_device *atdev = DEVTOAT(child); 220 221 switch (which) { 222 case LEGACY_IVAR_PCIDOMAIN: 223 return EINVAL; 224 case LEGACY_IVAR_PCIBUS: 225 atdev->lg_pcibus = value; 226 break; 227 default: 228 return ENOENT; 229 } 230 return 0; 231 } 232 233 #ifdef notyet 234 /* 235 * Legacy CPU attachment when ACPI is not available. Drivers like 236 * cpufreq(4) hang off this. 237 */ 238 static void cpu_identify(driver_t *driver, device_t parent); 239 static int cpu_read_ivar(device_t dev, device_t child, int index, 240 uintptr_t *result); 241 static device_t cpu_add_child(device_t bus, int order, const char *name, 242 int unit); 243 static struct resource_list *cpu_get_rlist(device_t dev, device_t child); 244 245 struct cpu_device { 246 struct resource_list cd_rl; 247 struct pcpu *cd_pcpu; 248 }; 249 250 static device_method_t cpu_methods[] = { 251 /* Device interface */ 252 DEVMETHOD(device_identify, cpu_identify), 253 DEVMETHOD(device_probe, bus_generic_probe), 254 DEVMETHOD(device_attach, bus_generic_attach), 255 DEVMETHOD(device_detach, bus_generic_detach), 256 DEVMETHOD(device_shutdown, bus_generic_shutdown), 257 DEVMETHOD(device_suspend, bus_generic_suspend), 258 DEVMETHOD(device_resume, bus_generic_resume), 259 260 /* Bus interface */ 261 DEVMETHOD(bus_add_child, cpu_add_child), 262 DEVMETHOD(bus_read_ivar, cpu_read_ivar), 263 DEVMETHOD(bus_print_child, bus_generic_print_child), 264 DEVMETHOD(bus_get_resource_list, cpu_get_rlist), 265 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 266 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 267 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 268 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 269 DEVMETHOD(bus_driver_added, bus_generic_driver_added), 270 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 271 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 272 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 273 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 274 275 DEVMETHOD_END 276 }; 277 278 static driver_t cpu_driver = { 279 "cpu", 280 cpu_methods, 281 1, /* no softc */ 282 }; 283 static devclass_t cpu_devclass; 284 DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, NULL, NULL); 285 286 static void 287 cpu_identify(driver_t *driver, device_t parent) 288 { 289 device_t child; 290 int i; 291 292 /* 293 * Attach a cpuX device for each CPU. We use an order of 150 294 * so that these devices are attached after the Host-PCI 295 * bridges (which are added at order 100). 296 */ 297 for (i = 0; i <= mp_maxid; i++) 298 if (!CPU_ABSENT(i)) { 299 child = BUS_ADD_CHILD(parent, 150, "cpu", i); 300 if (child == NULL) 301 panic("legacy_attach cpu"); 302 } 303 } 304 305 static device_t 306 cpu_add_child(device_t bus, int order, const char *name, int unit) 307 { 308 struct cpu_device *cd; 309 device_t child; 310 struct pcpu *pc; 311 312 if ((cd = kmalloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) 313 return (NULL); 314 315 resource_list_init(&cd->cd_rl); 316 pc = pcpu_find(device_get_unit(bus)); 317 cd->cd_pcpu = pc; 318 319 child = device_add_child_ordered(bus, order, name, unit); 320 if (child != NULL) { 321 pc->pc_device = child; 322 device_set_ivars(child, cd); 323 } else 324 kfree(cd, M_DEVBUF); 325 return (child); 326 } 327 328 static struct resource_list * 329 cpu_get_rlist(device_t dev, device_t child) 330 { 331 struct cpu_device *cpdev; 332 333 cpdev = device_get_ivars(child); 334 return (&cpdev->cd_rl); 335 } 336 337 static int 338 cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 339 { 340 struct cpu_device *cpdev; 341 342 if (index != CPU_IVAR_PCPU) 343 return (ENOENT); 344 cpdev = device_get_ivars(child); 345 *result = (uintptr_t)cpdev->cd_pcpu; 346 return (0); 347 } 348 #endif 349