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 30#ifdef __i386__ 31#include "opt_eisa.h" 32#include "opt_mca.h" 33#endif 34#include <sys/cdefs.h> 35__FBSDID("$FreeBSD: releng/10.3/sys/x86/x86/legacy.c 233707 2012-03-30 19:10:14Z jhb $"); 36 37/* 38 * This code implements a system driver for legacy systems that do not 39 * support ACPI or when ACPI support is not present in the kernel. 40 */ 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/bus.h> 45#include <sys/cpu.h> 46#include <sys/kernel.h> 47#include <sys/malloc.h> 48#include <sys/module.h> 49#include <machine/bus.h> 50#include <sys/pcpu.h> 51#include <sys/rman.h> 52#include <sys/smp.h> 53 54#ifdef DEV_MCA 55#include <i386/bios/mca_machdep.h> 56#endif 57 58#include <machine/clock.h> 59#include <machine/resource.h> 60#include <x86/legacyvar.h> 61 62static MALLOC_DEFINE(M_LEGACYDEV, "legacydrv", "legacy system device"); 63struct legacy_device { 64 int lg_pcibus; 65 int lg_pcislot; 66 int lg_pcifunc; 67}; 68 69#define DEVTOAT(dev) ((struct legacy_device *)device_get_ivars(dev)) 70 71static int legacy_probe(device_t); 72static int legacy_attach(device_t); 73static int legacy_print_child(device_t, device_t); 74static device_t legacy_add_child(device_t bus, u_int order, const char *name, 75 int unit); 76static int legacy_read_ivar(device_t, device_t, int, uintptr_t *); 77static int legacy_write_ivar(device_t, device_t, int, uintptr_t); 78 79static device_method_t legacy_methods[] = { 80 /* Device interface */ 81 DEVMETHOD(device_probe, legacy_probe), 82 DEVMETHOD(device_attach, legacy_attach), 83 DEVMETHOD(device_detach, bus_generic_detach), 84 DEVMETHOD(device_shutdown, bus_generic_shutdown), 85 DEVMETHOD(device_suspend, bus_generic_suspend), 86 DEVMETHOD(device_resume, bus_generic_resume), 87 88 /* Bus interface */ 89 DEVMETHOD(bus_print_child, legacy_print_child), 90 DEVMETHOD(bus_add_child, legacy_add_child), 91 DEVMETHOD(bus_read_ivar, legacy_read_ivar), 92 DEVMETHOD(bus_write_ivar, legacy_write_ivar), 93 DEVMETHOD(bus_alloc_resource, bus_generic_alloc_resource), 94 DEVMETHOD(bus_adjust_resource, bus_generic_adjust_resource), 95 DEVMETHOD(bus_release_resource, bus_generic_release_resource), 96 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 97 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 98 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 99 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 100 101 { 0, 0 } 102}; 103 104static driver_t legacy_driver = { 105 "legacy", 106 legacy_methods, 107 1, /* no softc */ 108}; 109static devclass_t legacy_devclass; 110 111DRIVER_MODULE(legacy, nexus, legacy_driver, legacy_devclass, 0, 0); 112 113static int 114legacy_probe(device_t dev) 115{ 116 117 device_set_desc(dev, "legacy system"); 118 device_quiet(dev); 119 return (0); 120} 121 122static int 123legacy_attach(device_t dev) 124{ 125 device_t child; 126 127 /* 128 * Let our child drivers identify any child devices that they 129 * can find. Once that is done attach any devices that we 130 * found. 131 */ 132 bus_generic_probe(dev); 133 bus_generic_attach(dev); 134 135 /* 136 * If we didn't see EISA or ISA on a pci bridge, create some 137 * connection points now so they show up "on motherboard". 138 */ 139#ifdef DEV_EISA 140 if (!devclass_get_device(devclass_find("eisa"), 0)) { 141 child = BUS_ADD_CHILD(dev, 0, "eisa", 0); 142 if (child == NULL) 143 panic("legacy_attach eisa"); 144 device_probe_and_attach(child); 145 } 146#endif 147#ifdef DEV_MCA 148 if (MCA_system && !devclass_get_device(devclass_find("mca"), 0)) { 149 child = BUS_ADD_CHILD(dev, 0, "mca", 0); 150 if (child == 0) 151 panic("legacy_probe mca"); 152 device_probe_and_attach(child); 153 } 154#endif 155 if (!devclass_get_device(devclass_find("isa"), 0)) { 156 child = BUS_ADD_CHILD(dev, 0, "isa", 0); 157 if (child == NULL) 158 panic("legacy_attach isa"); 159 device_probe_and_attach(child); 160 } 161 162 return 0; 163} 164 165static int 166legacy_print_child(device_t bus, device_t child) 167{ 168 struct legacy_device *atdev = DEVTOAT(child); 169 int retval = 0; 170 171 retval += bus_print_child_header(bus, child); 172 if (atdev->lg_pcibus != -1) 173 retval += printf(" pcibus %d", atdev->lg_pcibus); 174 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 175 176 return (retval); 177} 178 179static device_t 180legacy_add_child(device_t bus, u_int order, const char *name, int unit) 181{ 182 device_t child; 183 struct legacy_device *atdev; 184 185 atdev = malloc(sizeof(struct legacy_device), M_LEGACYDEV, 186 M_NOWAIT | M_ZERO); 187 if (atdev == NULL) 188 return(NULL); 189 atdev->lg_pcibus = -1; 190 atdev->lg_pcislot = -1; 191 atdev->lg_pcifunc = -1; 192 193 child = device_add_child_ordered(bus, order, name, unit); 194 if (child == NULL) 195 free(atdev, M_LEGACYDEV); 196 else 197 /* should we free this in legacy_child_detached? */ 198 device_set_ivars(child, atdev); 199 200 return (child); 201} 202 203static int 204legacy_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 205{ 206 struct legacy_device *atdev = DEVTOAT(child); 207 208 switch (which) { 209 case LEGACY_IVAR_PCIDOMAIN: 210 *result = 0; 211 break; 212 case LEGACY_IVAR_PCIBUS: 213 *result = atdev->lg_pcibus; 214 break; 215 case LEGACY_IVAR_PCISLOT: 216 *result = atdev->lg_pcislot; 217 break; 218 case LEGACY_IVAR_PCIFUNC: 219 *result = atdev->lg_pcifunc; 220 break; 221 default: 222 return ENOENT; 223 } 224 return 0; 225} 226 227 228static int 229legacy_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 230{ 231 struct legacy_device *atdev = DEVTOAT(child); 232 233 switch (which) { 234 case LEGACY_IVAR_PCIDOMAIN: 235 return EINVAL; 236 case LEGACY_IVAR_PCIBUS: 237 atdev->lg_pcibus = value; 238 break; 239 case LEGACY_IVAR_PCISLOT: 240 atdev->lg_pcislot = value; 241 break; 242 case LEGACY_IVAR_PCIFUNC: 243 atdev->lg_pcifunc = value; 244 break; 245 default: 246 return ENOENT; 247 } 248 return 0; 249} 250 251/* 252 * Legacy CPU attachment when ACPI is not available. Drivers like 253 * cpufreq(4) hang off this. 254 */ 255static void cpu_identify(driver_t *driver, device_t parent); 256static int cpu_read_ivar(device_t dev, device_t child, int index, 257 uintptr_t *result); 258static device_t cpu_add_child(device_t bus, u_int order, const char *name, 259 int unit); 260static struct resource_list *cpu_get_rlist(device_t dev, device_t child); 261 262struct cpu_device { 263 struct resource_list cd_rl; 264 struct pcpu *cd_pcpu; 265}; 266 267static device_method_t cpu_methods[] = { 268 /* Device interface */ 269 DEVMETHOD(device_identify, cpu_identify), 270 DEVMETHOD(device_probe, bus_generic_probe), 271 DEVMETHOD(device_attach, bus_generic_attach), 272 DEVMETHOD(device_detach, bus_generic_detach), 273 DEVMETHOD(device_shutdown, bus_generic_shutdown), 274 DEVMETHOD(device_suspend, bus_generic_suspend), 275 DEVMETHOD(device_resume, bus_generic_resume), 276 277 /* Bus interface */ 278 DEVMETHOD(bus_add_child, cpu_add_child), 279 DEVMETHOD(bus_read_ivar, cpu_read_ivar), 280 DEVMETHOD(bus_get_resource_list, cpu_get_rlist), 281 DEVMETHOD(bus_get_resource, bus_generic_rl_get_resource), 282 DEVMETHOD(bus_set_resource, bus_generic_rl_set_resource), 283 DEVMETHOD(bus_alloc_resource, bus_generic_rl_alloc_resource), 284 DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource), 285 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 286 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 287 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 288 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 289 290 DEVMETHOD_END 291}; 292 293static driver_t cpu_driver = { 294 "cpu", 295 cpu_methods, 296 1, /* no softc */ 297}; 298static devclass_t cpu_devclass; 299DRIVER_MODULE(cpu, legacy, cpu_driver, cpu_devclass, 0, 0); 300 301static void 302cpu_identify(driver_t *driver, device_t parent) 303{ 304 device_t child; 305 int i; 306 307 /* 308 * Attach a cpuX device for each CPU. We use an order of 150 309 * so that these devices are attached after the Host-PCI 310 * bridges (which are added at order 100). 311 */ 312 CPU_FOREACH(i) { 313 child = BUS_ADD_CHILD(parent, 150, "cpu", i); 314 if (child == NULL) 315 panic("legacy_attach cpu"); 316 } 317} 318 319static device_t 320cpu_add_child(device_t bus, u_int order, const char *name, int unit) 321{ 322 struct cpu_device *cd; 323 device_t child; 324 struct pcpu *pc; 325 326 if ((cd = malloc(sizeof(*cd), M_DEVBUF, M_NOWAIT | M_ZERO)) == NULL) 327 return (NULL); 328 329 resource_list_init(&cd->cd_rl); 330 pc = pcpu_find(device_get_unit(bus)); 331 cd->cd_pcpu = pc; 332 333 child = device_add_child_ordered(bus, order, name, unit); 334 if (child != NULL) { 335 pc->pc_device = child; 336 device_set_ivars(child, cd); 337 } else 338 free(cd, M_DEVBUF); 339 return (child); 340} 341 342static struct resource_list * 343cpu_get_rlist(device_t dev, device_t child) 344{ 345 struct cpu_device *cpdev; 346 347 cpdev = device_get_ivars(child); 348 return (&cpdev->cd_rl); 349} 350 351static int 352cpu_read_ivar(device_t dev, device_t child, int index, uintptr_t *result) 353{ 354 struct cpu_device *cpdev; 355 356 switch (index) { 357 case CPU_IVAR_PCPU: 358 cpdev = device_get_ivars(child); 359 *result = (uintptr_t)cpdev->cd_pcpu; 360 break; 361 case CPU_IVAR_NOMINAL_MHZ: 362 if (tsc_is_invariant) { 363 *result = (uintptr_t)(atomic_load_acq_64(&tsc_freq) / 364 1000000); 365 break; 366 } 367 /* FALLTHROUGH */ 368 default: 369 return (ENOENT); 370 } 371 return (0); 372} 373