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.
51 #include <sys/param.h>
52 #include <sys/systm.h>
54 #include <sys/kernel.h>
55 #include <sys/linker.h>
56 #include <sys/malloc.h>
57 #include <sys/module.h>
58 #include <machine/bus.h>
59 #include <machine/intr_machdep.h>
61 #include <sys/interrupt.h>
63 #include <machine/vmparam.h>
67 #include <machine/metadata.h>
68 #include <machine/nexusvar.h>
69 #include <machine/resource.h>
70 #include <machine/pc/bios.h>
77 #include <isa/isavar.h>
79 #include <pc98/cbus/cbus.h>
81 #include <isa/isareg.h>
84 #include <sys/rtprio.h>
86 #define ELF_KERN_STR ("elf"__XSTRING(__ELF_WORD_SIZE)" kernel")
88 static MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device");
90 #define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev))
92 struct rman irq_rman, drq_rman, port_rman, mem_rman;
94 static int nexus_probe(device_t);
95 static int nexus_attach(device_t);
96 static int nexus_print_all_resources(device_t dev);
97 static int nexus_print_child(device_t, device_t);
98 static device_t nexus_add_child(device_t bus, u_int order, const char *name,
100 static struct resource *nexus_alloc_resource(device_t, device_t, int, int *,
101 rman_res_t, rman_res_t, rman_res_t,
103 static int nexus_adjust_resource(device_t, device_t, int, struct resource *,
104 rman_res_t, rman_res_t);
106 static int nexus_bind_intr(device_t, device_t, struct resource *, int);
108 static int nexus_config_intr(device_t, int, enum intr_trigger,
110 static int nexus_describe_intr(device_t dev, device_t child,
111 struct resource *irq, void *cookie,
113 static int nexus_activate_resource(device_t, device_t, int, int,
115 static int nexus_deactivate_resource(device_t, device_t, int, int,
117 static int nexus_map_resource(device_t bus, device_t child, int type,
119 struct resource_map_request *argsp,
120 struct resource_map *map);
121 static int nexus_unmap_resource(device_t bus, device_t child, int type,
122 struct resource *r, struct resource_map *map);
123 static int nexus_release_resource(device_t, device_t, int, int,
125 static int nexus_setup_intr(device_t, device_t, struct resource *, int flags,
126 driver_filter_t filter, void (*)(void *), void *,
128 static int nexus_teardown_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,
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),
168 DEVMETHOD(bus_bind_intr, nexus_bind_intr),
170 DEVMETHOD(bus_config_intr, nexus_config_intr),
171 DEVMETHOD(bus_describe_intr, nexus_describe_intr),
172 DEVMETHOD(bus_get_resource_list, nexus_get_reslist),
173 DEVMETHOD(bus_set_resource, nexus_set_resource),
174 DEVMETHOD(bus_get_resource, nexus_get_resource),
175 DEVMETHOD(bus_delete_resource, nexus_delete_resource),
176 DEVMETHOD(bus_get_cpus, nexus_get_cpus),
180 DEVMETHOD(pcib_alloc_msi, nexus_alloc_msi),
181 DEVMETHOD(pcib_release_msi, nexus_release_msi),
182 DEVMETHOD(pcib_alloc_msix, nexus_alloc_msix),
183 DEVMETHOD(pcib_release_msix, nexus_release_msix),
184 DEVMETHOD(pcib_map_msi, nexus_map_msi),
190 DEFINE_CLASS_0(nexus, nexus_driver, nexus_methods, 1);
191 static devclass_t nexus_devclass;
193 DRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0);
196 nexus_probe(device_t dev)
199 device_quiet(dev); /* suppress attach message for neatness */
200 return (BUS_PROBE_GENERIC);
204 nexus_init_resources(void)
211 * - IRQ resource creation should be moved to the PIC/APIC driver.
212 * - DRQ resource creation should be moved to the DMAC driver.
213 * - The above should be sorted to probe earlier than any child busses.
215 * - Leave I/O and memory creation here, as child probes may need them.
216 * (especially eg. ACPI)
220 * IRQ's are on the mainboard on old systems, but on the ISA part
221 * of PCI->ISA bridges. There would be multiple sets of IRQs on
222 * multi-ISA-bus systems. PCI interrupts are routed to the ISA
223 * component, so in a way, PCI can be a partial child of an ISA bus(!).
224 * APIC interrupts are global though.
226 irq_rman.rm_start = 0;
227 irq_rman.rm_type = RMAN_ARRAY;
228 irq_rman.rm_descr = "Interrupt request lines";
229 irq_rman.rm_end = num_io_irqs - 1;
230 if (rman_init(&irq_rman))
231 panic("nexus_init_resources irq_rman");
234 * We search for regions of existing IRQs and add those to the IRQ
237 for (irq = 0; irq < num_io_irqs; irq++)
238 if (intr_lookup_source(irq) != NULL)
239 if (rman_manage_region(&irq_rman, irq, irq) != 0)
240 panic("nexus_init_resources irq_rman add");
243 * ISA DMA on PCI systems is implemented in the ISA part of each
244 * PCI->ISA bridge and the channels can be duplicated if there are
245 * multiple bridges. (eg: laptops with docking stations)
247 drq_rman.rm_start = 0;
253 drq_rman.rm_type = RMAN_ARRAY;
254 drq_rman.rm_descr = "DMA request lines";
255 /* XXX drq 0 not available on some machines */
256 if (rman_init(&drq_rman)
257 || rman_manage_region(&drq_rman,
258 drq_rman.rm_start, drq_rman.rm_end))
259 panic("nexus_init_resources drq_rman");
262 * However, IO ports and Memory truely are global at this level,
263 * as are APIC interrupts (however many IO APICS there turn out
264 * to be on large systems..)
266 port_rman.rm_start = 0;
267 port_rman.rm_end = 0xffff;
268 port_rman.rm_type = RMAN_ARRAY;
269 port_rman.rm_descr = "I/O ports";
270 if (rman_init(&port_rman)
271 || rman_manage_region(&port_rman, 0, 0xffff))
272 panic("nexus_init_resources port_rman");
274 mem_rman.rm_start = 0;
276 mem_rman.rm_end = BUS_SPACE_MAXADDR;
278 mem_rman.rm_end = ((1ULL << cpu_maxphyaddr) - 1);
280 mem_rman.rm_type = RMAN_ARRAY;
281 mem_rman.rm_descr = "I/O memory addresses";
282 if (rman_init(&mem_rman)
283 || rman_manage_region(&mem_rman, 0, mem_rman.rm_end))
284 panic("nexus_init_resources mem_rman");
288 nexus_attach(device_t dev)
291 nexus_init_resources();
292 bus_generic_probe(dev);
295 * Explicitly add the legacy0 device here. Other platform
296 * types (such as ACPI), use their own nexus(4) subclass
297 * driver to override this routine and add their own root bus.
299 if (BUS_ADD_CHILD(dev, 10, "legacy", 0) == NULL)
300 panic("legacy: could not attach");
301 bus_generic_attach(dev);
306 nexus_print_all_resources(device_t dev)
308 struct nexus_device *ndev = DEVTONX(dev);
309 struct resource_list *rl = &ndev->nx_resources;
312 if (STAILQ_FIRST(rl))
313 retval += printf(" at");
315 retval += resource_list_print_type(rl, "port", SYS_RES_IOPORT, "%#jx");
316 retval += resource_list_print_type(rl, "iomem", SYS_RES_MEMORY, "%#jx");
317 retval += resource_list_print_type(rl, "irq", SYS_RES_IRQ, "%jd");
323 nexus_print_child(device_t bus, device_t child)
327 retval += bus_print_child_header(bus, child);
328 retval += nexus_print_all_resources(child);
329 if (device_get_flags(child))
330 retval += printf(" flags %#x", device_get_flags(child));
331 retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */
337 nexus_add_child(device_t bus, u_int order, const char *name, int unit)
340 struct nexus_device *ndev;
342 ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO);
345 resource_list_init(&ndev->nx_resources);
347 child = device_add_child_ordered(bus, order, name, unit);
349 /* should we free this in nexus_child_detached? */
350 device_set_ivars(child, ndev);
373 * Allocate a resource on behalf of child. NB: child is usually going to be a
374 * child of one of our descendants, not a direct child of nexus0.
375 * (Exceptions include npx.)
377 static struct resource *
378 nexus_alloc_resource(device_t bus, device_t child, int type, int *rid,
379 rman_res_t start, rman_res_t end, rman_res_t count,
382 struct nexus_device *ndev = DEVTONX(child);
384 struct resource_list_entry *rle;
386 int needactivate = flags & RF_ACTIVE;
389 * If this is an allocation of the "default" range for a given
390 * RID, and we know what the resources for this device are
391 * (ie. they aren't maintained by a child bus), then work out
392 * the start/end values.
394 if (RMAN_IS_DEFAULT_RANGE(start, end) && (count == 1)) {
395 if (device_get_parent(child) != bus || ndev == NULL)
397 rle = resource_list_find(&ndev->nx_resources, type, *rid);
406 rm = nexus_rman(type);
410 rv = rman_reserve_resource(rm, start, end, count, flags, child);
413 rman_set_rid(rv, *rid);
416 if (bus_activate_resource(child, type, *rid, rv)) {
417 rman_release_resource(rv);
426 nexus_adjust_resource(device_t bus, device_t child, int type,
427 struct resource *r, rman_res_t start, rman_res_t end)
431 rm = nexus_rman(type);
434 if (!rman_is_region_manager(r, rm))
436 return (rman_adjust_resource(r, start, end));
440 nexus_activate_resource(device_t bus, device_t child, int type, int rid,
443 struct resource_map map;
446 error = rman_activate_resource(r);
450 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
451 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
452 error = nexus_map_resource(bus, child, type, r, NULL, &map);
454 rman_deactivate_resource(r);
458 rman_set_mapping(r,&map);
464 nexus_deactivate_resource(device_t bus, device_t child, int type, int rid,
467 struct resource_map map;
470 error = rman_deactivate_resource(r);
474 if (!(rman_get_flags(r) & RF_UNMAPPED) &&
475 (type == SYS_RES_MEMORY || type == SYS_RES_IOPORT)) {
476 rman_get_mapping(r, &map);
477 nexus_unmap_resource(bus, child, type, r, &map);
483 nexus_map_resource(device_t bus, device_t child, int type, struct resource *r,
484 struct resource_map_request *argsp, struct resource_map *map)
486 struct resource_map_request args;
487 rman_res_t end, length, start;
492 /* Resources must be active to be mapped. */
493 if (!(rman_get_flags(r) & RF_ACTIVE))
496 /* Mappings are only supported on I/O and memory resources. */
505 resource_init_map_request(&args);
507 bcopy(argsp, &args, imin(argsp->size, args.size));
508 start = rman_get_start(r) + args.offset;
509 if (args.length == 0)
510 length = rman_get_size(r);
512 length = args.length;
513 end = start + length - 1;
514 if (start > rman_get_end(r) || start < rman_get_start(r))
516 if (end > rman_get_end(r) || end < start)
520 * If this is a memory resource, map it into the kernel.
525 error = i386_bus_space_handle_alloc(X86_BUS_SPACE_IO,
526 start, length, &map->r_bushandle);
530 map->r_bushandle = start;
532 map->r_bustag = X86_BUS_SPACE_IO;
533 map->r_size = length;
538 error = i386_bus_space_handle_alloc(X86_BUS_SPACE_MEM,
539 start, length, &map->r_bushandle);
543 map->r_vaddr = pmap_mapdev_attr(start, length, args.memattr);
544 map->r_bustag = X86_BUS_SPACE_MEM;
545 map->r_size = length;
548 * PC-98 stores the virtual address as a member of the
549 * structure in the handle. On plain x86, the handle is
550 * the virtual address.
553 map->r_bushandle->bsh_base = (bus_addr_t)map->r_vaddr;
555 map->r_bushandle = (bus_space_handle_t)map->r_vaddr;
563 nexus_unmap_resource(device_t bus, device_t child, int type, struct resource *r,
564 struct resource_map *map)
568 * If this is a memory resource, unmap it.
572 pmap_unmapdev((vm_offset_t)map->r_vaddr, map->r_size);
576 i386_bus_space_handle_free(map->r_bustag, map->r_bushandle,
577 map->r_bushandle->bsh_sz);
587 nexus_release_resource(device_t bus, device_t child, int type, int rid,
591 if (rman_get_flags(r) & RF_ACTIVE) {
592 int error = bus_deactivate_resource(child, type, rid, r);
596 return (rman_release_resource(r));
600 * Currently this uses the really grody interface from kern/kern_intr.c
601 * (which really doesn't belong in kern/anything.c). Eventually, all of
602 * the code in kern_intr.c and machdep_intr.c should get moved here, since
603 * this is going to be the official interface.
606 nexus_setup_intr(device_t bus, device_t child, struct resource *irq,
607 int flags, driver_filter_t filter, void (*ihand)(void *),
608 void *arg, void **cookiep)
612 /* somebody tried to setup an irq that failed to allocate! */
614 panic("nexus_setup_intr: NULL irq resource!");
617 if ((rman_get_flags(irq) & RF_SHAREABLE) == 0)
621 * We depend here on rman_activate_resource() being idempotent.
623 error = rman_activate_resource(irq);
627 error = intr_add_handler(device_get_nameunit(child),
628 rman_get_start(irq), filter, ihand, arg, flags, cookiep);
634 nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih)
636 return (intr_remove_handler(ih));
641 nexus_bind_intr(device_t dev, device_t child, struct resource *irq, int cpu)
643 return (intr_bind(rman_get_start(irq), cpu));
648 nexus_config_intr(device_t dev, int irq, enum intr_trigger trig,
649 enum intr_polarity pol)
651 return (intr_config_intr(irq, trig, pol));
655 nexus_describe_intr(device_t dev, device_t child, struct resource *irq,
656 void *cookie, const char *descr)
659 return (intr_describe(rman_get_start(irq), cookie, descr));
662 static struct resource_list *
663 nexus_get_reslist(device_t dev, device_t child)
665 struct nexus_device *ndev = DEVTONX(child);
667 return (&ndev->nx_resources);
671 nexus_set_resource(device_t dev, device_t child, int type, int rid,
672 rman_res_t start, rman_res_t count)
674 struct nexus_device *ndev = DEVTONX(child);
675 struct resource_list *rl = &ndev->nx_resources;
677 /* XXX this should return a success/failure indicator */
678 resource_list_add(rl, type, rid, start, start + count - 1, count);
683 nexus_get_resource(device_t dev, device_t child, int type, int rid,
684 rman_res_t *startp, rman_res_t *countp)
686 struct nexus_device *ndev = DEVTONX(child);
687 struct resource_list *rl = &ndev->nx_resources;
688 struct resource_list_entry *rle;
690 rle = resource_list_find(rl, type, rid);
694 *startp = rle->start;
696 *countp = rle->count;
701 nexus_delete_resource(device_t dev, device_t child, int type, int rid)
703 struct nexus_device *ndev = DEVTONX(child);
704 struct resource_list *rl = &ndev->nx_resources;
706 resource_list_delete(rl, type, rid);
710 nexus_get_cpus(device_t dev, device_t child, enum cpu_sets op, size_t setsize,
717 if (setsize != sizeof(cpuset_t))
723 return (bus_generic_get_cpus(dev, child, op, setsize, cpuset));
727 /* Called from the MSI code to add new IRQs to the IRQ rman. */
729 nexus_add_irq(u_long irq)
732 if (rman_manage_region(&irq_rman, irq, irq) != 0)
733 panic("%s: failed", __func__);
738 nexus_alloc_msix(device_t pcib, device_t dev, int *irq)
741 return (msix_alloc(dev, irq));
745 nexus_release_msix(device_t pcib, device_t dev, int irq)
748 return (msix_release(irq));
752 nexus_alloc_msi(device_t pcib, device_t dev, int count, int maxcount, int *irqs)
755 return (msi_alloc(dev, count, maxcount, irqs));
759 nexus_release_msi(device_t pcib, device_t dev, int count, int *irqs)
762 return (msi_release(irqs, count));
766 nexus_map_msi(device_t pcib, device_t dev, int irq, uint64_t *addr, uint32_t *data)
769 return (msi_map(irq, addr, data));
773 /* Placeholder for system RAM. */
775 ram_identify(driver_t *driver, device_t parent)
778 if (resource_disabled("ram", 0))
780 if (BUS_ADD_CHILD(parent, 0, "ram", 0) == NULL)
781 panic("ram_identify");
785 ram_probe(device_t dev)
789 device_set_desc(dev, "System RAM");
794 ram_attach(device_t dev)
796 struct bios_smap *smapbase, *smap, *smapend;
797 struct resource *res;
803 /* Retrieve the system memory map from the loader. */
804 kmdp = preload_search_by_type("elf kernel");
806 kmdp = preload_search_by_type(ELF_KERN_STR);
807 smapbase = (struct bios_smap *)preload_search_info(kmdp,
808 MODINFO_METADATA | MODINFOMD_SMAP);
809 if (smapbase != NULL) {
810 smapsize = *((u_int32_t *)smapbase - 1);
811 smapend = (struct bios_smap *)((uintptr_t)smapbase + smapsize);
814 for (smap = smapbase; smap < smapend; smap++) {
815 if (smap->type != SMAP_TYPE_MEMORY ||
820 * Resources use long's to track resources, so
821 * we can't include memory regions above 4GB.
823 if (smap->base > ~0ul)
826 error = bus_set_resource(dev, SYS_RES_MEMORY, rid,
827 smap->base, smap->length);
830 "ram_attach: resource %d failed set with %d",
832 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
835 panic("ram_attach: resource %d failed to attach",
843 * If the system map is not available, fall back to using
844 * dump_avail[]. We use the dump_avail[] array rather than
845 * phys_avail[] for the memory map as phys_avail[] contains
846 * holes for kernel memory, page 0, the message buffer, and
847 * the dcons buffer. We test the end address in the loop
848 * instead of the start since the start address for the first
851 for (rid = 0, p = dump_avail; p[1] != 0; rid++, p += 2) {
854 * Resources use long's to track resources, so we can't
855 * include memory regions above 4GB.
860 error = bus_set_resource(dev, SYS_RES_MEMORY, rid, p[0],
863 panic("ram_attach: resource %d failed set with %d", rid,
865 res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, 0);
867 panic("ram_attach: resource %d failed to attach", rid);
872 static device_method_t ram_methods[] = {
873 /* Device interface */
874 DEVMETHOD(device_identify, ram_identify),
875 DEVMETHOD(device_probe, ram_probe),
876 DEVMETHOD(device_attach, ram_attach),
880 static driver_t ram_driver = {
886 static devclass_t ram_devclass;
888 DRIVER_MODULE(ram, nexus, ram_driver, ram_devclass, 0, 0);
892 * Placeholder which claims PnP 'devices' which describe system
895 static struct isa_pnp_id sysresource_ids[] = {
896 { 0x010cd041 /* PNP0c01 */, "System Memory" },
897 { 0x020cd041 /* PNP0c02 */, "System Resource" },
902 sysresource_probe(device_t dev)
906 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) {
913 sysresource_attach(device_t dev)
918 static device_method_t sysresource_methods[] = {
919 /* Device interface */
920 DEVMETHOD(device_probe, sysresource_probe),
921 DEVMETHOD(device_attach, sysresource_attach),
922 DEVMETHOD(device_detach, bus_generic_detach),
923 DEVMETHOD(device_shutdown, bus_generic_shutdown),
924 DEVMETHOD(device_suspend, bus_generic_suspend),
925 DEVMETHOD(device_resume, bus_generic_resume),
929 static driver_t sysresource_driver = {
935 static devclass_t sysresource_devclass;
937 DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0);