2 * Copyright 1998 Massachusetts Institute of Technology
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
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
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
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.
52 #include <sys/param.h>
53 #include <sys/systm.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>
62 #include <sys/interrupt.h>
64 #include <machine/md_var.h>
65 #include <machine/vmparam.h>
69 #include <machine/metadata.h>
70 #include <machine/nexusvar.h>
71 #include <machine/resource.h>
72 #include <machine/pc/bios.h>
79 #include <isa/isavar.h>
80 #include <isa/isareg.h>
82 #include <sys/rtprio.h>
84 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel")
86 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
88 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
90 struct rman irq_rman, drq_rman, port_rman, mem_rman;
92 static int nexus_probe(device_t);
93 static int nexus_attach(device_t);
94 static int nexus_print_all_resources(device_t dev);
95 static int nexus_print_child(device_t, device_t);
96 static device_t nexus_add_child(device_t bus, u_int order, const char *name,
98 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
99 rman_res_t, rman_res_t, rman_res_t,
101 static int nexus_adjust_resource(device_t, device_t, int, struct resource *,
102 rman_res_t, rman_res_t);
104 static int nexus_bind_intr(device_t, device_t, struct resource *, int);
106 static int nexus_config_intr(device_t, int, enum intr_trigger,
108 static int nexus_describe_intr(device_t dev, device_t child,
109 struct resource *irq, void *cookie,
111 static int nexus_activate_resource(device_t, device_t, int, int,
113 static int nexus_deactivate_resource(device_t, device_t, int, int,
115 static int nexus_map_resource(device_t bus, device_t child, int type,
117 struct resource_map_request *argsp,
118 struct resource_map *map);
119 static int nexus_unmap_resource(device_t bus, device_t child, int type,
120 struct resource *r, struct resource_map *map);
121 static int nexus_release_resource(device_t, device_t, int, int,
123 static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
124 driver_filter_t filter, void (*)(void *), void *,
126 static int nexus_teardown_intr(device_t, device_t, struct resource *,
128 static int nexus_suspend_intr(device_t, device_t, struct resource *);
129 static int nexus_resume_intr(device_t, device_t, struct resource *);
130 static struct resource_list *nexus_get_reslist(device_t dev, device_t child);
131 static int nexus_set_resource(device_t, device_t, int, int,
132 rman_res_t, rman_res_t);
133 static int nexus_get_resource(device_t, device_t, int, int,
134 rman_res_t *, rman_res_t *);
135 static void nexus_delete_resource(device_t, device_t, int, int);
136 static int nexus_get_cpus(device_t, device_t, enum cpu_sets, size_t,
138 #if defined(DEV_APIC) && defined(DEV_PCI)
139 static int nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs);
140 static int nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs);
141 static int nexus_alloc_msix(device_t pcib, device_t dev, int *irq);
142 static int nexus_release_msix(device_t pcib, device_t dev, int irq);
143 static int nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data);
146 static device_method_t nexus_methods[] = {
147 /* Device interface */
148 DEVMETHOD(device_probe, nexus_probe),
149 DEVMETHOD(device_attach, nexus_attach),
150 DEVMETHOD(device_detach, bus_generic_detach),
151 DEVMETHOD(device_shutdown, bus_generic_shutdown),
152 DEVMETHOD(device_suspend, bus_generic_suspend),
153 DEVMETHOD(device_resume, bus_generic_resume),
156 DEVMETHOD(bus_print_child, nexus_print_child),
157 DEVMETHOD(bus_add_child, nexus_add_child),
158 DEVMETHOD(bus_alloc_resource, nexus_alloc_resource),
159 DEVMETHOD(bus_adjust_resource, nexus_adjust_resource),
160 DEVMETHOD(bus_release_resource, nexus_release_resource),
161 DEVMETHOD(bus_activate_resource, nexus_activate_resource),
162 DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource),
163 DEVMETHOD(bus_map_resource, nexus_map_resource),
164 DEVMETHOD(bus_unmap_resource, nexus_unmap_resource),
165 DEVMETHOD(bus_setup_intr, nexus_setup_intr),
166 DEVMETHOD(bus_teardown_intr, nexus_teardown_intr),
167 DEVMETHOD(bus_suspend_intr, nexus_suspend_intr),
168 DEVMETHOD(bus_resume_intr, nexus_resume_intr),
170 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
172 DEVMETHOD(bus_config_intr, nexus_config_intr),
173 DEVMETHOD(bus_describe_intr, nexus_describe_intr),
174 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
175 DEVMETHOD(bus_set_resource, nexus_set_resource),
176 DEVMETHOD(bus_get_resource, nexus_get_resource),
177 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
178 DEVMETHOD(bus_get_cpus, nexus_get_cpus),
181 #if defined(DEV_APIC) && defined(DEV_PCI)
182 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi),
183 DEVMETHOD(pcib_release_msi, nexus_release_msi),
184 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix),
185 DEVMETHOD(pcib_release_msix, nexus_release_msix),
186 DEVMETHOD(pcib_map_msi, nexus_map_msi),
192 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1);
193 static devclass_t nexus_devclass;
195 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
198 nexus_probe(device_t dev)
201 device_quiet(dev); /* suppress attach message for neatness */
202 return (BUS_PROBE_GENERIC);
206 nexus_init_resources(void)
213 * - IRQ resource creation should be moved to the PIC/APIC driver.
214 * - DRQ resource creation should be moved to the DMAC driver.
215 * - The above should be sorted to probe earlier than any child buses.
217 * - Leave I/O and memory creation here, as child probes may need them.
218 * (especially eg. ACPI)
222 * IRQ's are on the mainboard on old systems, but on the ISA part
223 * of PCI->ISA bridges. There would be multiple sets of IRQs on
224 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
225 * component, so in a way, PCI can be a partial child of an ISA bus(!).
226 * APIC interrupts are global though.
228 irq_rman.rm_start = 0;
229 irq_rman.rm_type = RMAN_ARRAY;
230 irq_rman.rm_descr = "Interrupt request lines";
231 irq_rman.rm_end = num_io_irqs - 1;
232 if (rman_init(&irq_rman))
233 panic("nexus_init_resources irq_rman");
236 * We search for regions of existing IRQs and add those to the IRQ
239 for (irq = 0; irq < num_io_irqs; irq++)
240 if (intr_lookup_source(irq) != NULL)
241 if (rman_manage_region(&irq_rman, irq, irq) != 0)
242 panic("nexus_init_resources irq_rman add");
245 * ISA DMA on PCI systems is implemented in the ISA part of each
246 * PCI->ISA bridge and the channels can be duplicated if there are
247 * multiple bridges. (eg: laptops with docking stations)
249 drq_rman.rm_start = 0;
251 drq_rman.rm_type = RMAN_ARRAY;
252 drq_rman.rm_descr = "DMA request lines";
253 /* XXX drq 0 not available on some machines */
254 if (rman_init(&drq_rman)
255 || rman_manage_region(&drq_rman,
256 drq_rman.rm_start, drq_rman.rm_end))
257 panic("nexus_init_resources drq_rman");
260 * However, IO ports and Memory truely are global at this level,
261 * as are APIC interrupts (however many IO APICS there turn out
262 * to be on large systems..)
264 port_rman.rm_start = 0;
265 port_rman.rm_end = 0xffff;
266 port_rman.rm_type = RMAN_ARRAY;
267 port_rman.rm_descr = "I/O ports";
268 if (rman_init(&port_rman)
269 || rman_manage_region(&port_rman, 0, 0xffff))
270 panic("nexus_init_resources port_rman");
272 mem_rman.rm_start = 0;
273 mem_rman.rm_end = cpu_getmaxphyaddr();
274 mem_rman.rm_type = RMAN_ARRAY;
275 mem_rman.rm_descr = "I/O memory addresses";
276 if (rman_init(&mem_rman)
277 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end))
278 panic("nexus_init_resources mem_rman");
282 nexus_attach(device_t dev)
285 nexus_init_resources();
286 bus_generic_probe(dev);
289 * Explicitly add the legacy0 device here. Other platform
290 * types (such as ACPI), use their own nexus(4) subclass
291 * driver to override this routine and add their own root bus.
293 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL)
294 panic("legacy: could not attach");
295 bus_generic_attach(dev);
300 nexus_print_all_resources(device_t dev)
302 struct nexus_device *ndev = DEVTONX(dev);
303 struct resource_list *rl = &ndev->nx_resources;
306 if (STAILQ_FIRST(rl))
307 retval += printf(" at");
309 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
310 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx");
311 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
317 nexus_print_child(device_t bus, device_t child)
321 retval += bus_print_child_header(bus, child);
322 retval += nexus_print_all_resources(child);
323 if (device_get_flags(child))
324 retval += printf(" flags %#x", device_get_flags(child));
325 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
331 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
334 struct nexus_device *ndev;
336 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
339 resource_list_init(&ndev->nx_resources);
341 child = device_add_child_ordered(bus, order, name, unit);
343 /* should we free this in nexus_child_detached? */
344 device_set_ivars(child, ndev);
367 * Allocate a resource on behalf of child. NB: child is usually going to be a
368 * child of one of our descendants, not a direct child of nexus0.
369 * (Exceptions include npx.)
371 static struct resource *
372 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
373 rman_res_t start, rman_res_t end, rman_res_t count,
376 struct nexus_device *ndev = DEVTONX(child);
378 struct resource_list_entry *rle;
380 int needactivate = flags & RF_ACTIVE;
383 * If this is an allocation of the "default" range for a given
384 * RID, and we know what the resources for this device are
385 * (ie. they aren't maintained by a child bus), then work out
386 * the start/end values.
388 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) {
389 if (device_get_parent(child) != bus || ndev == NULL)
391 rle = resource_list_find(&ndev->nx_resources, type, *rid);
400 rm = nexus_rman(type);
404 rv = rman_reserve_resource(rm, start, end, count, flags, child);
407 rman_set_rid(rv, *rid);
410 if (bus_activate_resource(child, type, *rid, rv)) {
411 rman_release_resource(rv);
420 nexus_adjust_resource(device_t bus, device_t child, int type,
421 struct resource *r, rman_res_t start, rman_res_t end)
425 rm = nexus_rman(type);
428 if (!rman_is_region_manager(r, rm))
430 return (rman_adjust_resource(r, start, end));
434 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
437 struct resource_map map;
440 error = rman_activate_resource(r);
444 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
445 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
446 error = nexus_map_resource(bus, child, type, r, NULL, &map);
448 rman_deactivate_resource(r);
452 rman_set_mapping(r,&map);
458 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
461 struct resource_map map;
464 error = rman_deactivate_resource(r);
468 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
469 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
470 rman_get_mapping(r, &map);
471 nexus_unmap_resource(bus, child, type, r, &map);
477 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r,
478 struct resource_map_request *argsp, struct resource_map *map)
480 struct resource_map_request args;
481 rman_res_t end, length, start;
483 /* Resources must be active to be mapped. */
484 if (!(rman_get_flags(r) & RF_ACTIVE))
487 /* Mappings are only supported on I/O and memory resources. */
496 resource_init_map_request(&args);
498 bcopy(argsp, &args, imin(argsp->size, args.size));
499 start = rman_get_start(r) + args.offset;
500 if (args.length == 0)
501 length = rman_get_size(r);
503 length = args.length;
504 end = start + length - 1;
505 if (start > rman_get_end(r) || start < rman_get_start(r))
507 if (end > rman_get_end(r) || end < start)
511 * If this is a memory resource, map it into the kernel.
515 map->r_bushandle = start;
516 map->r_bustag = X86_BUS_SPACE_IO;
517 map->r_size = length;
521 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr);
522 map->r_bustag = X86_BUS_SPACE_MEM;
523 map->r_size = length;
526 * The handle is the virtual address.
528 map->r_bushandle = (bus_space_handle_t)map->r_vaddr;
535 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r,
536 struct resource_map *map)
540 * If this is a memory resource, unmap it.
544 pmap_unmapdev((vm_offset_t)map->r_vaddr, map->r_size);
555 nexus_release_resource(device_t bus, device_t child, int type, int rid,
559 if (rman_get_flags(r) & RF_ACTIVE) {
560 int error = bus_deactivate_resource(child, type, rid, r);
564 return (rman_release_resource(r));
568 * Currently this uses the really grody interface from kern/kern_intr.c
569 * (which really doesn't belong in kern/anything.c). Eventually, all of
570 * the code in kern_intr.c and machdep_intr.c should get moved here, since
571 * this is going to be the official interface.
574 nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
575 int flags, driver_filter_t filter, void (*ihand)(void *),
576 void *arg, void **cookiep)
580 /* somebody tried to setup an irq that failed to allocate! */
582 panic("nexus_setup_intr: NULL irq resource!");
585 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
589 * We depend here on rman_activate_resource() being idempotent.
591 error = rman_activate_resource(irq);
594 if (bus_get_domain(child, &domain) != 0)
597 error = intr_add_handler(device_get_nameunit(child),
598 rman_get_start(irq), filter, ihand, arg, flags, cookiep, domain);
600 rman_set_irq_cookie(irq, *cookiep);
606 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
610 error = intr_remove_handler(ih);
612 rman_set_irq_cookie(r, NULL);
617 nexus_suspend_intr(device_t dev, device_t child, struct resource *irq)
619 return (intr_event_suspend_handler(rman_get_irq_cookie(irq)));
623 nexus_resume_intr(device_t dev, device_t child, struct resource *irq)
625 return (intr_event_resume_handler(rman_get_irq_cookie(irq)));
630 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
632 return (intr_bind(rman_get_start(irq), cpu));
637 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
638 enum intr_polarity pol)
640 return (intr_config_intr(irq, trig, pol));
644 nexus_describe_intr(device_t dev, device_t child, struct resource *irq,
645 void *cookie, const char *descr)
648 return (intr_describe(rman_get_start(irq), cookie, descr));
651 static struct resource_list *
652 nexus_get_reslist(device_t dev, device_t child)
654 struct nexus_device *ndev = DEVTONX(child);
656 return (&ndev->nx_resources);
660 nexus_set_resource(device_t dev, device_t child, int type, int rid,
661 rman_res_t start, rman_res_t count)
663 struct nexus_device *ndev = DEVTONX(child);
664 struct resource_list *rl = &ndev->nx_resources;
666 /* XXX this should return a success/failure indicator */
667 resource_list_add(rl, type, rid, start, start + count - 1, count);
672 nexus_get_resource(device_t dev, device_t child, int type, int rid,
673 rman_res_t *startp, rman_res_t *countp)
675 struct nexus_device *ndev = DEVTONX(child);
676 struct resource_list *rl = &ndev->nx_resources;
677 struct resource_list_entry *rle;
679 rle = resource_list_find(rl, type, rid);
683 *startp = rle->start;
685 *countp = rle->count;
690 nexus_delete_resource(device_t dev, device_t child, int type, int rid)
692 struct nexus_device *ndev = DEVTONX(child);
693 struct resource_list *rl = &ndev->nx_resources;
695 resource_list_delete(rl, type, rid);
699 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize,
706 if (setsize != sizeof(cpuset_t))
712 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
716 /* Called from the MSI code to add new IRQs to the IRQ rman. */
718 nexus_add_irq(u_long irq)
721 if (rman_manage_region(&irq_rman, irq, irq) != 0)
722 panic("%s: failed", __func__);
725 #if defined(DEV_APIC) && defined(DEV_PCI)
727 nexus_alloc_msix(device_t pcib, device_t dev, int *irq)
730 return (msix_alloc(dev, irq));
734 nexus_release_msix(device_t pcib, device_t dev, int irq)
737 return (msix_release(irq));
741 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
744 return (msi_alloc(dev, count, maxcount, irqs));
748 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs)
751 return (msi_release(irqs, count));
755 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
758 return (msi_map(irq, addr, data));
760 #endif /* DEV_APIC && DEV_PCI */
762 /* Placeholder for system RAM. */
764 ram_identify(driver_t *driver, device_t parent)
767 if (resource_disabled("ram", 0))
769 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL)
770 panic("ram_identify");
774 ram_probe(device_t dev)
778 device_set_desc(dev, "System RAM");
783 ram_attach(device_t dev)
785 struct bios_smap *smapbase, *smap, *smapend;
786 struct resource *res;
793 /* Retrieve the system memory map from the loader. */
794 kmdp = preload_search_by_type("elf kernel");
796 kmdp = preload_search_by_type(ELF_KERN_STR);
797 smapbase = (struct bios_smap *)preload_search_info(kmdp,
798 MODINFO_METADATA | MODINFOMD_SMAP);
799 if (smapbase != NULL) {
800 smapsize = *((u_int32_t *)smapbase - 1);
801 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize);
804 for (smap = smapbase; smap < smapend; smap++) {
805 if (smap->type != SMAP_TYPE_MEMORY ||
808 if (smap->base > mem_rman.rm_end)
810 length = smap->base + smap->length > mem_rman.rm_end ?
811 mem_rman.rm_end - smap->base : smap->length;
812 error = bus_set_resource(dev, SYS_RES_MEMORY, rid,
816 "ram_attach: resource %d failed set with %d",
818 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
821 panic("ram_attach: resource %d failed to attach",
829 * If the system map is not available, fall back to using
830 * dump_avail[]. We use the dump_avail[] array rather than
831 * phys_avail[] for the memory map as phys_avail[] contains
832 * holes for kernel memory, page 0, the message buffer, and
833 * the dcons buffer. We test the end address in the loop
834 * instead of the start since the start address for the first
837 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) {
838 if (p[0] > mem_rman.rm_end)
840 length = (p[1] > mem_rman.rm_end ? mem_rman.rm_end : p[1]) -
842 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0],
845 panic("ram_attach: resource %d failed set with %d", rid,
847 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
849 panic("ram_attach: resource %d failed to attach", rid);
854 static device_method_t ram_methods[] = {
855 /* Device interface */
856 DEVMETHOD(device_identify, ram_identify),
857 DEVMETHOD(device_probe, ram_probe),
858 DEVMETHOD(device_attach, ram_attach),
862 static driver_t ram_driver = {
868 static devclass_t ram_devclass;
870 DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, 0, 0);
874 * Placeholder which claims PnP 'devices' which describe system
877 static struct isa_pnp_id sysresource_ids[] = {
878 { 0x010cd041 /* PNP0c01 */, "System Memory" },
879 { 0x020cd041 /* PNP0c02 */, "System Resource" },
884 sysresource_probe(device_t dev)
888 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) {
895 sysresource_attach(device_t dev)
900 static device_method_t sysresource_methods[] = {
901 /* Device interface */
902 DEVMETHOD(device_probe, sysresource_probe),
903 DEVMETHOD(device_attach, sysresource_attach),
904 DEVMETHOD(device_detach, bus_generic_detach),
905 DEVMETHOD(device_shutdown, bus_generic_shutdown),
906 DEVMETHOD(device_suspend, bus_generic_suspend),
907 DEVMETHOD(device_resume, bus_generic_resume),
911 static driver_t sysresource_driver = {
917 static devclass_t sysresource_devclass;
919 DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0);
920 ISA_PNP_INFO(sysresource_ids);