FreeBSD/Linux Kernel Cross Reference
sys/x86/x86/nexus.c
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 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32
33 /*
34 * This code implements a `root nexus' for Intel Architecture
35 * machines. The function of the root nexus is to serve as an
36 * attachment point for both processors and buses, and to manage
37 * resources which are common to all of them. In particular,
38 * this code implements the core resource managers for interrupt
39 * requests, DMA requests (which rightfully should be a part of the
40 * ISA code but it's easier to do it here for now), I/O port addresses,
41 * and I/O memory address space.
42 */
43
44 #ifdef __amd64__
45 #define DEV_APIC
46 #else
47 #include "opt_apic.h"
48 #endif
49 #include "opt_isa.h"
50 #include "opt_pci.h"
51
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/bus.h>
55 #include <sys/kernel.h>
56 #include <sys/linker.h>
57 #include <sys/malloc.h>
58 #include <sys/module.h>
59 #include <machine/bus.h>
60 #include <machine/intr_machdep.h>
61 #include <sys/rman.h>
62 #include <sys/interrupt.h>
63
64 #include <machine/md_var.h>
65 #include <vm/vm.h>
66 #include <vm/vm_param.h>
67 #include <vm/vm_page.h>
68 #include <vm/vm_phys.h>
69 #include <vm/vm_dumpset.h>
70 #include <vm/pmap.h>
71
72 #include <machine/metadata.h>
73 #include <machine/nexusvar.h>
74 #include <machine/resource.h>
75 #include <machine/pc/bios.h>
76
77 #ifdef DEV_APIC
78 #include "pcib_if.h"
79 #endif
80
81 #ifdef DEV_ISA
82 #include <isa/isavar.h>
83 #include <isa/isareg.h>
84 #endif
85 #include <sys/rtprio.h>
86
87 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel")
88
89 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
90
91 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
92
93 struct rman irq_rman, drq_rman, port_rman, mem_rman;
94
95 static int nexus_probe(device_t);
96 static int nexus_attach(device_t);
97 static int nexus_print_all_resources(device_t dev);
98 static int nexus_print_child(device_t, device_t);
99 static device_t nexus_add_child(device_t bus, u_int order, const char *name,
100 int unit);
101 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
102 rman_res_t, rman_res_t, rman_res_t,
103 u_int);
104 static int nexus_adjust_resource(device_t, device_t, int, struct resource *,
105 rman_res_t, rman_res_t);
106 #ifdef SMP
107 static int nexus_bind_intr(device_t, device_t, struct resource *, int);
108 #endif
109 static int nexus_config_intr(device_t, int, enum intr_trigger,
110 enum intr_polarity);
111 static int nexus_describe_intr(device_t dev, device_t child,
112 struct resource *irq, void *cookie,
113 const char *descr);
114 static int nexus_activate_resource(device_t, device_t, int, int,
115 struct resource *);
116 static int nexus_deactivate_resource(device_t, device_t, int, int,
117 struct resource *);
118 static int nexus_map_resource(device_t bus, device_t child, int type,
119 struct resource *r,
120 struct resource_map_request *argsp,
121 struct resource_map *map);
122 static int nexus_unmap_resource(device_t bus, device_t child, int type,
123 struct resource *r, struct resource_map *map);
124 static int nexus_release_resource(device_t, device_t, int, int,
125 struct resource *);
126 static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
127 driver_filter_t filter, void (*)(void *), void *,
128 void **);
129 static int nexus_teardown_intr(device_t, device_t, struct resource *,
130 void *);
131 static int nexus_suspend_intr(device_t, device_t, struct resource *);
132 static int nexus_resume_intr(device_t, device_t, struct resource *);
133 static struct resource_list *nexus_get_reslist(device_t dev, device_t child);
134 static int nexus_set_resource(device_t, device_t, int, int,
135 rman_res_t, rman_res_t);
136 static int nexus_get_resource(device_t, device_t, int, int,
137 rman_res_t *, rman_res_t *);
138 static void nexus_delete_resource(device_t, device_t, int, int);
139 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t,
140 cpuset_t *);
141 #if defined(DEV_APIC) && defined(DEV_PCI)
142 static int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs);
143 static int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs);
144 static int nexus_alloc_msix(device_t pcib, device_t dev, int *irq);
145 static int nexus_release_msix(device_t pcib, device_t dev, int irq);
146 static int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data);
147 #endif
148
149 static device_method_t nexus_methods[] = {
150 /* Device interface */
151 DEVMETHOD(device_probe, nexus_probe),
152 DEVMETHOD(device_attach, nexus_attach),
153 DEVMETHOD(device_detach, bus_generic_detach),
154 DEVMETHOD(device_shutdown, bus_generic_shutdown),
155 DEVMETHOD(device_suspend, bus_generic_suspend),
156 DEVMETHOD(device_resume, bus_generic_resume),
157
158 /* Bus interface */
159 DEVMETHOD(bus_print_child, nexus_print_child),
160 DEVMETHOD(bus_add_child, nexus_add_child),
161 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
162 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource),
163 DEVMETHOD(bus_release_resource, nexus_release_resource),
164 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
165 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
166 DEVMETHOD(bus_map_resource, nexus_map_resource),
167 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource),
168 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
169 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
170 DEVMETHOD(bus_suspend_intr, nexus_suspend_intr),
171 DEVMETHOD(bus_resume_intr, nexus_resume_intr),
172 #ifdef SMP
173 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
174 #endif
175 DEVMETHOD(bus_config_intr, nexus_config_intr),
176 DEVMETHOD(bus_describe_intr, nexus_describe_intr),
177 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
178 DEVMETHOD(bus_set_resource, nexus_set_resource),
179 DEVMETHOD(bus_get_resource, nexus_get_resource),
180 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
181 DEVMETHOD(bus_get_cpus, nexus_get_cpus),
182
183 /* pcib interface */
184 #if defined(DEV_APIC) && defined(DEV_PCI)
185 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi),
186 DEVMETHOD(pcib_release_msi, nexus_release_msi),
187 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix),
188 DEVMETHOD(pcib_release_msix, nexus_release_msix),
189 DEVMETHOD(pcib_map_msi, nexus_map_msi),
190 #endif
191 { 0, 0 }
192 };
193
194 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1);
195
196 DRIVER_MODULE(nexus, root, nexus_driver, 0, 0);
197
198 static int
199 nexus_probe(device_t dev)
200 {
201
202 device_quiet(dev); /* suppress attach message for neatness */
203 return (BUS_PROBE_GENERIC);
204 }
205
206 void
207 nexus_init_resources(void)
208 {
209 int irq;
210
211 /*
212 * XXX working notes:
213 *
214 * - IRQ resource creation should be moved to the PIC/APIC driver.
215 * - DRQ resource creation should be moved to the DMAC driver.
216 * - The above should be sorted to probe earlier than any child buses.
217 *
218 * - Leave I/O and memory creation here, as child probes may need them.
219 * (especially eg. ACPI)
220 */
221
222 /*
223 * IRQ's are on the mainboard on old systems, but on the ISA part
224 * of PCI->ISA bridges. There would be multiple sets of IRQs on
225 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
226 * component, so in a way, PCI can be a partial child of an ISA bus(!).
227 * APIC interrupts are global though.
228 */
229 irq_rman.rm_start = 0;
230 irq_rman.rm_type = RMAN_ARRAY;
231 irq_rman.rm_descr = "Interrupt request lines";
232 irq_rman.rm_end = num_io_irqs - 1;
233 if (rman_init(&irq_rman))
234 panic("nexus_init_resources irq_rman");
235
236 /*
237 * We search for regions of existing IRQs and add those to the IRQ
238 * resource manager.
239 */
240 for (irq = 0; irq < num_io_irqs; irq++)
241 if (intr_lookup_source(irq) != NULL)
242 if (rman_manage_region(&irq_rman, irq, irq) != 0)
243 panic("nexus_init_resources irq_rman add");
244
245 /*
246 * ISA DMA on PCI systems is implemented in the ISA part of each
247 * PCI->ISA bridge and the channels can be duplicated if there are
248 * multiple bridges. (eg: laptops with docking stations)
249 */
250 drq_rman.rm_start = 0;
251 drq_rman.rm_end = 7;
252 drq_rman.rm_type = RMAN_ARRAY;
253 drq_rman.rm_descr = "DMA request lines";
254 /* XXX drq 0 not available on some machines */
255 if (rman_init(&drq_rman)
256 || rman_manage_region(&drq_rman,
257 drq_rman.rm_start, drq_rman.rm_end))
258 panic("nexus_init_resources drq_rman");
259
260 /*
261 * However, IO ports and Memory truely are global at this level,
262 * as are APIC interrupts (however many IO APICS there turn out
263 * to be on large systems..)
264 */
265 port_rman.rm_start = 0;
266 port_rman.rm_end = 0xffff;
267 port_rman.rm_type = RMAN_ARRAY;
268 port_rman.rm_descr = "I/O ports";
269 if (rman_init(&port_rman)
270 || rman_manage_region(&port_rman, 0, 0xffff))
271 panic("nexus_init_resources port_rman");
272
273 mem_rman.rm_start = 0;
274 mem_rman.rm_end = cpu_getmaxphyaddr();
275 mem_rman.rm_type = RMAN_ARRAY;
276 mem_rman.rm_descr = "I/O memory addresses";
277 if (rman_init(&mem_rman)
278 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end))
279 panic("nexus_init_resources mem_rman");
280 }
281
282 static int
283 nexus_attach(device_t dev)
284 {
285
286 nexus_init_resources();
287 bus_generic_probe(dev);
288
289 /*
290 * Explicitly add the legacy0 device here. Other platform
291 * types (such as ACPI), use their own nexus(4) subclass
292 * driver to override this routine and add their own root bus.
293 */
294 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL)
295 panic("legacy: could not attach");
296 bus_generic_attach(dev);
297 return 0;
298 }
299
300 static int
301 nexus_print_all_resources(device_t dev)
302 {
303 struct nexus_device *ndev = DEVTONX(dev);
304 struct resource_list *rl = &ndev->nx_resources;
305 int retval = 0;
306
307 if (STAILQ_FIRST(rl))
308 retval += printf(" at");
309
310 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
311 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx");
312 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
313
314 return retval;
315 }
316
317 static int
318 nexus_print_child(device_t bus, device_t child)
319 {
320 int retval = 0;
321
322 retval += bus_print_child_header(bus, child);
323 retval += nexus_print_all_resources(child);
324 if (device_get_flags(child))
325 retval += printf(" flags %#x", device_get_flags(child));
326 retval += printf("\n");
327
328 return (retval);
329 }
330
331 static device_t
332 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
333 {
334 device_t child;
335 struct nexus_device *ndev;
336
337 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
338 if (!ndev)
339 return(0);
340 resource_list_init(&ndev->nx_resources);
341
342 child = device_add_child_ordered(bus, order, name, unit);
343
344 /* should we free this in nexus_child_detached? */
345 device_set_ivars(child, ndev);
346
347 return(child);
348 }
349
350 static struct rman *
351 nexus_rman(int type)
352 {
353 switch (type) {
354 case SYS_RES_IRQ:
355 return (&irq_rman);
356 case SYS_RES_DRQ:
357 return (&drq_rman);
358 case SYS_RES_IOPORT:
359 return (&port_rman);
360 case SYS_RES_MEMORY:
361 return (&mem_rman);
362 default:
363 return (NULL);
364 }
365 }
366
367 /*
368 * Allocate a resource on behalf of child. NB: child is usually going to be a
369 * child of one of our descendants, not a direct child of nexus0.
370 * (Exceptions include npx.)
371 */
372 static struct resource *
373 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
374 rman_res_t start, rman_res_t end, rman_res_t count,
375 u_int flags)
376 {
377 struct nexus_device *ndev = DEVTONX(child);
378 struct resource *rv;
379 struct resource_list_entry *rle;
380 struct rman *rm;
381 int needactivate = flags & RF_ACTIVE;
382
383 /*
384 * If this is an allocation of the "default" range for a given
385 * RID, and we know what the resources for this device are
386 * (ie. they aren't maintained by a child bus), then work out
387 * the start/end values.
388 */
389 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) {
390 if (device_get_parent(child) != bus || ndev == NULL)
391 return(NULL);
392 rle = resource_list_find(&ndev->nx_resources, type, *rid);
393 if (rle == NULL)
394 return(NULL);
395 start = rle->start;
396 end = rle->end;
397 count = rle->count;
398 }
399
400 flags &= ~RF_ACTIVE;
401 rm = nexus_rman(type);
402 if (rm == NULL)
403 return (NULL);
404
405 rv = rman_reserve_resource(rm, start, end, count, flags, child);
406 if (rv == NULL)
407 return 0;
408 rman_set_rid(rv, *rid);
409
410 if (needactivate) {
411 if (bus_activate_resource(child, type, *rid, rv)) {
412 rman_release_resource(rv);
413 return 0;
414 }
415 }
416
417 return rv;
418 }
419
420 static int
421 nexus_adjust_resource(device_t bus, device_t child, int type,
422 struct resource *r, rman_res_t start, rman_res_t end)
423 {
424 struct rman *rm;
425
426 rm = nexus_rman(type);
427 if (rm == NULL)
428 return (ENXIO);
429 if (!rman_is_region_manager(r, rm))
430 return (EINVAL);
431 return (rman_adjust_resource(r, start, end));
432 }
433
434 static int
435 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
436 struct resource *r)
437 {
438 struct resource_map map;
439 int error;
440
441 error = rman_activate_resource(r);
442 if (error != 0)
443 return (error);
444
445 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
446 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
447 error = nexus_map_resource(bus, child, type, r, NULL, &map);
448 if (error) {
449 rman_deactivate_resource(r);
450 return (error);
451 }
452
453 rman_set_mapping(r,&map);
454 }
455 return (0);
456 }
457
458 static int
459 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
460 struct resource *r)
461 {
462 struct resource_map map;
463 int error;
464
465 error = rman_deactivate_resource(r);
466 if (error)
467 return (error);
468
469 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
470 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
471 rman_get_mapping(r, &map);
472 nexus_unmap_resource(bus, child, type, r, &map);
473 }
474 return (0);
475 }
476
477 static int
478 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r,
479 struct resource_map_request *argsp, struct resource_map *map)
480 {
481 struct resource_map_request args;
482 rman_res_t end, length, start;
483
484 /* Resources must be active to be mapped. */
485 if (!(rman_get_flags(r) & RF_ACTIVE))
486 return (ENXIO);
487
488 /* Mappings are only supported on I/O and memory resources. */
489 switch (type) {
490 case SYS_RES_IOPORT:
491 case SYS_RES_MEMORY:
492 break;
493 default:
494 return (EINVAL);
495 }
496
497 resource_init_map_request(&args);
498 if (argsp != NULL)
499 bcopy(argsp, &args, imin(argsp->size, args.size));
500 start = rman_get_start(r) + args.offset;
501 if (args.length == 0)
502 length = rman_get_size(r);
503 else
504 length = args.length;
505 end = start + length - 1;
506 if (start > rman_get_end(r) || start < rman_get_start(r))
507 return (EINVAL);
508 if (end > rman_get_end(r) || end < start)
509 return (EINVAL);
510
511 /*
512 * If this is a memory resource, map it into the kernel.
513 */
514 switch (type) {
515 case SYS_RES_IOPORT:
516 map->r_bushandle = start;
517 map->r_bustag = X86_BUS_SPACE_IO;
518 map->r_size = length;
519 map->r_vaddr = NULL;
520 break;
521 case SYS_RES_MEMORY:
522 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr);
523 map->r_bustag = X86_BUS_SPACE_MEM;
524 map->r_size = length;
525
526 /*
527 * The handle is the virtual address.
528 */
529 map->r_bushandle = (bus_space_handle_t)map->r_vaddr;
530 break;
531 }
532 return (0);
533 }
534
535 static int
536 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r,
537 struct resource_map *map)
538 {
539
540 /*
541 * If this is a memory resource, unmap it.
542 */
543 switch (type) {
544 case SYS_RES_MEMORY:
545 pmap_unmapdev(map->r_vaddr, map->r_size);
546 /* FALLTHROUGH */
547 case SYS_RES_IOPORT:
548 break;
549 default:
550 return (EINVAL);
551 }
552 return (0);
553 }
554
555 static int
556 nexus_release_resource(device_t bus, device_t child, int type, int rid,
557 struct resource *r)
558 {
559
560 if (rman_get_flags(r) & RF_ACTIVE) {
561 int error = bus_deactivate_resource(child, type, rid, r);
562 if (error)
563 return error;
564 }
565 return (rman_release_resource(r));
566 }
567
568 /*
569 * Currently this uses the really grody interface from kern/kern_intr.c
570 * (which really doesn't belong in kern/anything.c). Eventually, all of
571 * the code in kern_intr.c and machdep_intr.c should get moved here, since
572 * this is going to be the official interface.
573 */
574 static int
575 nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
576 int flags, driver_filter_t filter, void (*ihand)(void *),
577 void *arg, void **cookiep)
578 {
579 int error, domain;
580
581 /* somebody tried to setup an irq that failed to allocate! */
582 if (irq == NULL)
583 panic("nexus_setup_intr: NULL irq resource!");
584
585 *cookiep = NULL;
586 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
587 flags |= INTR_EXCL;
588
589 /*
590 * We depend here on rman_activate_resource() being idempotent.
591 */
592 error = rman_activate_resource(irq);
593 if (error)
594 return (error);
595 if (bus_get_domain(child, &domain) != 0)
596 domain = 0;
597
598 error = intr_add_handler(device_get_nameunit(child),
599 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain);
600 if (error == 0)
601 rman_set_irq_cookie(irq, *cookiep);
602
603 return (error);
604 }
605
606 static int
607 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
608 {
609 int error;
610
611 error = intr_remove_handler(ih);
612 if (error == 0)
613 rman_set_irq_cookie(r, NULL);
614 return (error);
615 }
616
617 static int
618 nexus_suspend_intr(device_t dev, device_t child, struct resource *irq)
619 {
620 return (intr_event_suspend_handler(rman_get_irq_cookie(irq)));
621 }
622
623 static int
624 nexus_resume_intr(device_t dev, device_t child, struct resource *irq)
625 {
626 return (intr_event_resume_handler(rman_get_irq_cookie(irq)));
627 }
628
629 #ifdef SMP
630 static int
631 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
632 {
633 return (intr_bind(rman_get_start(irq), cpu));
634 }
635 #endif
636
637 static int
638 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
639 enum intr_polarity pol)
640 {
641 return (intr_config_intr(irq, trig, pol));
642 }
643
644 static int
645 nexus_describe_intr(device_t dev, device_t child, struct resource *irq,
646 void *cookie, const char *descr)
647 {
648
649 return (intr_describe(rman_get_start(irq), cookie, descr));
650 }
651
652 static struct resource_list *
653 nexus_get_reslist(device_t dev, device_t child)
654 {
655 struct nexus_device *ndev = DEVTONX(child);
656
657 return (&ndev->nx_resources);
658 }
659
660 static int
661 nexus_set_resource(device_t dev, device_t child, int type, int rid,
662 rman_res_t start, rman_res_t count)
663 {
664 struct nexus_device *ndev = DEVTONX(child);
665 struct resource_list *rl = &ndev->nx_resources;
666
667 /* XXX this should return a success/failure indicator */
668 resource_list_add(rl, type, rid, start, start + count - 1, count);
669 return(0);
670 }
671
672 static int
673 nexus_get_resource(device_t dev, device_t child, int type, int rid,
674 rman_res_t *startp, rman_res_t *countp)
675 {
676 struct nexus_device *ndev = DEVTONX(child);
677 struct resource_list *rl = &ndev->nx_resources;
678 struct resource_list_entry *rle;
679
680 rle = resource_list_find(rl, type, rid);
681 if (!rle)
682 return(ENOENT);
683 if (startp)
684 *startp = rle->start;
685 if (countp)
686 *countp = rle->count;
687 return(0);
688 }
689
690 static void
691 nexus_delete_resource(device_t dev, device_t child, int type, int rid)
692 {
693 struct nexus_device *ndev = DEVTONX(child);
694 struct resource_list *rl = &ndev->nx_resources;
695
696 resource_list_delete(rl, type, rid);
697 }
698
699 static int
700 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize,
701 cpuset_t *cpuset)
702 {
703
704 switch (op) {
705 #ifdef SMP
706 case INTR_CPUS:
707 if (setsize != sizeof(cpuset_t))
708 return (EINVAL);
709 *cpuset = intr_cpus;
710 return (0);
711 #endif
712 default:
713 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
714 }
715 }
716
717 /* Called from the MSI code to add new IRQs to the IRQ rman. */
718 void
719 nexus_add_irq(u_long irq)
720 {
721
722 if (rman_manage_region(&irq_rman, irq, irq) != 0)
723 panic("%s: failed", __func__);
724 }
725
726 #if defined(DEV_APIC) && defined(DEV_PCI)
727 static int
728 nexus_alloc_msix(device_t pcib, device_t dev, int *irq)
729 {
730
731 return (msix_alloc(dev, irq));
732 }
733
734 static int
735 nexus_release_msix(device_t pcib, device_t dev, int irq)
736 {
737
738 return (msix_release(irq));
739 }
740
741 static int
742 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
743 {
744
745 return (msi_alloc(dev, count, maxcount, irqs));
746 }
747
748 static int
749 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs)
750 {
751
752 return (msi_release(irqs, count));
753 }
754
755 static int
756 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
757 {
758
759 return (msi_map(irq, addr, data));
760 }
761 #endif /* DEV_APIC && DEV_PCI */
762
763 /* Placeholder for system RAM. */
764 static void
765 ram_identify(driver_t *driver, device_t parent)
766 {
767
768 if (resource_disabled("ram", 0))
769 return;
770 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL)
771 panic("ram_identify");
772 }
773
774 static int
775 ram_probe(device_t dev)
776 {
777
778 device_quiet(dev);
779 device_set_desc(dev, "System RAM");
780 return (0);
781 }
782
783 static int
784 ram_attach(device_t dev)
785 {
786 struct bios_smap *smapbase, *smap, *smapend;
787 struct resource *res;
788 rman_res_t length;
789 vm_paddr_t *p;
790 caddr_t kmdp;
791 uint32_t smapsize;
792 int error, rid;
793
794 /* Retrieve the system memory map from the loader. */
795 kmdp = preload_search_by_type("elf kernel");
796 if (kmdp == NULL)
797 kmdp = preload_search_by_type(ELF_KERN_STR);
798 smapbase = (struct bios_smap *)preload_search_info(kmdp,
799 MODINFO_METADATA | MODINFOMD_SMAP);
800 if (smapbase != NULL) {
801 smapsize = *((u_int32_t *)smapbase - 1);
802 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize);
803
804 rid = 0;
805 for (smap = smapbase; smap < smapend; smap++) {
806 if (smap->type != SMAP_TYPE_MEMORY ||
807 smap->length == 0)
808 continue;
809 if (smap->base > mem_rman.rm_end)
810 continue;
811 length = smap->base + smap->length > mem_rman.rm_end ?
812 mem_rman.rm_end - smap->base : smap->length;
813 error = bus_set_resource(dev, SYS_RES_MEMORY, rid,
814 smap->base, length);
815 if (error)
816 panic(
817 "ram_attach: resource %d failed set with %d",
818 rid, error);
819 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
820 0);
821 if (res == NULL)
822 panic("ram_attach: resource %d failed to attach",
823 rid);
824 rid++;
825 }
826 return (0);
827 }
828
829 /*
830 * If the system map is not available, fall back to using
831 * dump_avail[]. We use the dump_avail[] array rather than
832 * phys_avail[] for the memory map as phys_avail[] contains
833 * holes for kernel memory, page 0, the message buffer, and
834 * the dcons buffer. We test the end address in the loop
835 * instead of the start since the start address for the first
836 * segment is 0.
837 */
838 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) {
839 if (p[0] > mem_rman.rm_end)
840 break;
841 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) -
842 p[0];
843 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0],
844 length);
845 if (error)
846 panic("ram_attach: resource %d failed set with %d", rid,
847 error);
848 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
849 if (res == NULL)
850 panic("ram_attach: resource %d failed to attach", rid);
851 }
852 return (0);
853 }
854
855 static device_method_t ram_methods[] = {
856 /* Device interface */
857 DEVMETHOD(device_identify, ram_identify),
858 DEVMETHOD(device_probe, ram_probe),
859 DEVMETHOD(device_attach, ram_attach),
860 { 0, 0 }
861 };
862
863 static driver_t ram_driver = {
864 "ram",
865 ram_methods,
866 1, /* no softc */
867 };
868
869 DRIVER_MODULE(ram, nexus, ram_driver, 0, 0);
870
871 #ifdef DEV_ISA
872 /*
873 * Placeholder which claims PnP 'devices' which describe system
874 * resources.
875 */
876 static struct isa_pnp_id sysresource_ids[] = {
877 { 0x010cd041 /* PNP0c01 */, "System Memory" },
878 { 0x020cd041 /* PNP0c02 */, "System Resource" },
879 { 0 }
880 };
881
882 static int
883 sysresource_probe(device_t dev)
884 {
885 int result;
886
887 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) {
888 device_quiet(dev);
889 }
890 return(result);
891 }
892
893 static int
894 sysresource_attach(device_t dev)
895 {
896 return(0);
897 }
898
899 static device_method_t sysresource_methods[] = {
900 /* Device interface */
901 DEVMETHOD(device_probe, sysresource_probe),
902 DEVMETHOD(device_attach, sysresource_attach),
903 DEVMETHOD(device_detach, bus_generic_detach),
904 DEVMETHOD(device_shutdown, bus_generic_shutdown),
905 DEVMETHOD(device_suspend, bus_generic_suspend),
906 DEVMETHOD(device_resume, bus_generic_resume),
907 { 0, 0 }
908 };
909
910 static driver_t sysresource_driver = {
911 "sysresource",
912 sysresource_methods,
913 1, /* no softc */
914 };
915
916 DRIVER_MODULE(sysresource, isa, sysresource_driver, 0, 0);
917 ISA_PNP_INFO(sysresource_ids);
918 #endif /* DEV_ISA */
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