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1 /*-
2  * Copyright (c) 2006 Marius Strobl <marius@FreeBSD.org>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
29
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/bus.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/resource.h>
36 #include <sys/rman.h>
37
38 #include <dev/ofw/ofw_bus.h>
39 #include <dev/ofw/ofw_bus_subr.h>
40 #include <dev/ofw/openfirm.h>
41
42 #include <machine/bus.h>
43 #include <machine/bus_common.h>
44 #include <machine/intr_machdep.h>
45 #include <machine/resource.h>
46
47 #define UPA_NREG        3
48
49 #define UPA_CFG         0
50 #define UPA_IMR1        1
51 #define UPA_IMR2        2
52
53 /* UPA_CFG bank */
54 #define UPA_CFG_UPA0                    0x00    /* UPA0 config register */
55 #define UPA_CFG_UPA1                    0x08    /* UPA1 config register */
56 #define UPA_CFG_IF                      0x10    /* interface config register */
57 #define  UPA_CFG_IF_RST                 0x00
58 #define  UPA_CFG_IF_POK_RST             0x02
59 #define  UPA_CFG_IF_POK                 0x03
60 #define UPA_CFG_ESTAR                   0x18    /* Estar config register */
61 #define  UPA_CFG_ESTAR_SPEED_FULL       0x01
62 #define  UPA_CFG_ESTAR_SPEED_1_2        0x02
63 #define  UPA_CFG_ESTAR_SPEED_1_64       0x40
64
65 #define UPA_INO_BASE                    0x2a
66 #define UPA_INO_MAX                     0x2b
67
68 struct upa_regs {
69         uint64_t        phys;
70         uint64_t        size;
71 };
72
73 struct upa_ranges {
74         uint64_t        child;
75         uint64_t        parent;
76         uint64_t        size;
77 };
78
79 struct upa_devinfo {
80         struct ofw_bus_devinfo  udi_obdinfo;
81         struct resource_list    udi_rl;
82 };
83
84 struct upa_softc {
85         struct resource         *sc_res[UPA_NREG];
86         bus_space_tag_t         sc_bt[UPA_NREG];
87         bus_space_handle_t      sc_bh[UPA_NREG];
88
89         uint32_t                sc_ign;
90
91         int                     sc_nrange;
92         struct upa_ranges       *sc_ranges;
93 };
94
95 #define UPA_READ(sc, reg, off) \
96         bus_space_read_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off))
97 #define UPA_WRITE(sc, reg, off, val) \
98         bus_space_write_8((sc)->sc_bt[(reg)], (sc)->sc_bh[(reg)], (off), (val))
99
100 static device_probe_t upa_probe;
101 static device_attach_t upa_attach;
102 static bus_alloc_resource_t upa_alloc_resource;
103 static bus_setup_intr_t upa_setup_intr;
104 static bus_print_child_t upa_print_child;
105 static bus_probe_nomatch_t upa_probe_nomatch;
106 static bus_get_resource_list_t upa_get_resource_list;
107 static ofw_bus_get_devinfo_t upa_get_devinfo;
108
109 static void upa_intr_enable(void *);
110 static void upa_intr_disable(void *);
111 static void upa_intr_assign(void *);
112 static struct upa_devinfo *upa_setup_dinfo(device_t, struct upa_softc *,
113     phandle_t, uint32_t);
114 static void upa_destroy_dinfo(struct upa_devinfo *);
115 static int upa_print_res(struct upa_devinfo *);
116
117 static device_method_t upa_methods[] = {
118         /* Device interface */
119         DEVMETHOD(device_probe,         upa_probe),
120         DEVMETHOD(device_attach,        upa_attach),
121         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
122         DEVMETHOD(device_suspend,       bus_generic_suspend),
123         DEVMETHOD(device_resume,        bus_generic_resume),
124
125         /* Bus interface */
126         DEVMETHOD(bus_print_child,      upa_print_child),
127         DEVMETHOD(bus_probe_nomatch,    upa_probe_nomatch),
128         DEVMETHOD(bus_read_ivar,        bus_generic_read_ivar),
129         DEVMETHOD(bus_write_ivar,       bus_generic_write_ivar),
130         DEVMETHOD(bus_alloc_resource,   upa_alloc_resource),
131         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
132         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
133         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
134         DEVMETHOD(bus_setup_intr,       upa_setup_intr),
135         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
136         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
137         DEVMETHOD(bus_get_resource_list, upa_get_resource_list),
138         DEVMETHOD(bus_child_pnpinfo_str, ofw_bus_gen_child_pnpinfo_str),
139
140         /* ofw_bus interface */
141         DEVMETHOD(ofw_bus_get_devinfo,  upa_get_devinfo),
142         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
143         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
144         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
145         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
146         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
147
148         KOBJMETHOD_END
149 };
150
151 static devclass_t upa_devclass;
152
153 DEFINE_CLASS_0(upa, upa_driver, upa_methods, sizeof(struct upa_softc));
154 EARLY_DRIVER_MODULE(upa, nexus, upa_driver, upa_devclass, 0, 0, BUS_PASS_BUS);
155
156 static const struct intr_controller upa_ic = {
157         upa_intr_enable,
158         upa_intr_disable,
159         upa_intr_assign,
160         /* The interrupts are pulse type and thus automatically cleared. */
161         NULL
162 };
163
164 struct upa_icarg {
165         struct upa_softc        *uica_sc;
166         u_int                   uica_imr;
167 };
168
169 static int
170 upa_probe(device_t dev)
171 {
172         const char* compat;
173
174         compat = ofw_bus_get_compat(dev);
175         if (compat != NULL && strcmp(ofw_bus_get_name(dev), "upa") == 0 &&
176             strcmp(compat, "upa64s") == 0) {
177                 device_set_desc(dev, "UPA bridge");
178                 return (BUS_PROBE_DEFAULT);
179         }
180         return (ENXIO);
181 }
182
183 static int
184 upa_attach(device_t dev)
185 {
186         struct upa_devinfo *udi;
187         struct upa_icarg *uica;
188         struct upa_softc *sc;
189         phandle_t child, node;
190         device_t cdev;
191         uint32_t portid;
192         int i, imr, j, rid;
193 #if 1
194         device_t *children, schizo;
195         u_long scount, sstart, ucount, ustart;
196         int nchildren;
197 #endif
198
199         sc = device_get_softc(dev);
200         node = ofw_bus_get_node(dev);
201         for (i = UPA_CFG; i <= UPA_IMR2; i++) {
202                 rid = i;
203                 /*
204                  * The UPA_IMR{1,2} resources are shared with that of the
205                  * Schizo PCI bus B CSR bank.
206                  */
207 #if 0
208                 sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
209                     &rid, ((i == UPA_IMR1 || i == UPA_IMR2) ? RF_SHAREABLE :
210                     0) | RF_ACTIVE);
211                 if (sc->sc_res[i] == NULL) {
212                         device_printf(dev,
213                             "could not allocate resource %d\n", i);
214                         goto fail;
215                 }
216                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
217                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
218 #else
219                 /*
220                  * Workaround for the fact that rman(9) only allows to
221                  * share resources of the same size.
222                  */
223                 if (i == UPA_IMR1 || i == UPA_IMR2) {
224                         if (bus_get_resource(dev, SYS_RES_MEMORY, i, &ustart,
225                             &ucount) != 0) {
226                                 device_printf(dev,
227                                     "could not determine UPA resource\n");
228                                 goto fail;
229                         }
230                         if (device_get_children(device_get_parent(dev),
231                             &children, &nchildren) != 0) {
232                                 device_printf(dev, "could not get children\n");
233                                 goto fail;
234                         }
235                         schizo = NULL;
236                         for (j = 0; j < nchildren; j++) {
237                                 if (ofw_bus_get_type(children[j]) != NULL &&
238                                     strcmp(ofw_bus_get_type(children[j]),
239                                     "pci") == 0 &&
240                                     ofw_bus_get_compat(children[j]) != NULL &&
241                                     strcmp(ofw_bus_get_compat(children[j]),
242                                     "pci108e,8001") == 0 &&
243                                     ((bus_get_resource_start(children[j],
244                                     SYS_RES_MEMORY, 0) >> 20) & 1) == 1) {
245                                         schizo = children[j];
246                                         break;
247                                 }
248                         }
249                         free(children, M_TEMP);
250                         if (schizo == NULL) {
251                                 device_printf(dev, "could not find Schizo\n");
252                                 goto fail;
253                         }
254                         if (bus_get_resource(schizo, SYS_RES_MEMORY, 0,
255                             &sstart, &scount) != 0) {
256                                 device_printf(dev,
257                                     "could not determine Schizo resource\n");
258                                 goto fail;
259                         }
260                         sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
261                             &rid, sstart, sstart + scount - 1, scount,
262                             RF_SHAREABLE | RF_ACTIVE);
263                 } else
264                         sc->sc_res[i] = bus_alloc_resource_any(dev,
265                             SYS_RES_MEMORY, &rid, RF_ACTIVE);
266                 if (sc->sc_res[i] == NULL) {
267                         device_printf(dev,
268                             "could not allocate resource %d\n", i);
269                         goto fail;
270                 }
271                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
272                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
273                 if (i == UPA_IMR1 || i == UPA_IMR2)
274                         bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
275                             ustart - sstart, ucount, &sc->sc_bh[i]);
276 #endif
277         }
278
279         if (OF_getprop(node, "portid", &sc->sc_ign, sizeof(sc->sc_ign)) == -1) {
280                 device_printf(dev, "could not determine IGN\n");
281                 goto fail;
282         }
283
284         sc->sc_nrange = OF_getprop_alloc(node, "ranges", sizeof(*sc->sc_ranges),
285             (void **)&sc->sc_ranges);
286         if (sc->sc_nrange == -1) {
287                 device_printf(dev, "could not determine ranges\n");
288                 goto fail;
289         }
290
291         /*
292          * Hunt through all the interrupt mapping regs and register our
293          * interrupt controller for the corresponding interrupt vectors.
294          * We do this early in order to be able to catch stray interrupts.
295          */
296         for (i = UPA_INO_BASE; i <= UPA_INO_MAX; i++) {
297                 imr = 0;
298                 for (j = UPA_IMR1; j <= UPA_IMR2; j++) {
299                         if (INTVEC(UPA_READ(sc, j, 0x0)) ==
300                             INTMAP_VEC(sc->sc_ign, i)) {
301                                 imr = j;
302                                 break;
303                         }
304                 }
305                 if (imr == 0)
306                         continue;
307                 uica = malloc(sizeof(*uica), M_DEVBUF, M_NOWAIT);
308                 if (uica == NULL)
309                         panic("%s: could not allocate interrupt controller "
310                             "argument", __func__);
311                 uica->uica_sc = sc;
312                 uica->uica_imr = imr;
313 #ifdef UPA_DEBUG
314                 device_printf(dev, "intr map (INO %d) IMR%d: %#lx\n",
315                     i, imr, (u_long)UPA_READ(sc, imr, 0x0));
316 #endif
317                 j = intr_controller_register(INTMAP_VEC(sc->sc_ign, i),
318                     &upa_ic, uica);
319                 if (j != 0)
320                         device_printf(dev, "could not register interrupt "
321                             "controller for INO %d (%d)\n", i, j);
322         }
323
324         /* Make sure the power level is appropriate for normal operation. */
325         if (UPA_READ(sc, UPA_CFG, UPA_CFG_IF) != UPA_CFG_IF_POK) {
326                 if (bootverbose)
327                         device_printf(dev, "applying power\n");
328                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_ESTAR, UPA_CFG_ESTAR_SPEED_1_2);
329                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_ESTAR, UPA_CFG_ESTAR_SPEED_FULL);
330                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_ESTAR);
331                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_IF, UPA_CFG_IF_POK_RST);
332                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_IF);
333                 DELAY(20000);
334                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_IF, UPA_CFG_IF_POK);
335                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_IF);
336         }
337
338         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
339                 /*
340                  * The `upa-portid' properties of the children are used as
341                  * index for the interrupt mapping registers.
342                  * The `upa-portid' properties are also used to make up the
343                  * INOs of the children as the values contained in their
344                  * `interrupts' properties are bogus.
345                  */
346                 if (OF_getprop(child, "upa-portid", &portid,
347                     sizeof(portid)) == -1) {
348                         device_printf(dev,
349                             "could not determine upa-portid of child 0x%lx\n",
350                             (unsigned long)child);
351                         continue;
352                 }
353                 if (portid > 1) {
354                         device_printf(dev,
355                             "upa-portid %d of child 0x%lx invalid\n", portid,
356                             (unsigned long)child);
357                         continue;
358                 }
359                 if ((udi = upa_setup_dinfo(dev, sc, child, portid)) == NULL)
360                         continue;
361                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
362                         device_printf(dev, "<%s>: device_add_child failed\n",
363                             udi->udi_obdinfo.obd_name);
364                         upa_destroy_dinfo(udi);
365                         continue;
366                 }
367                 device_set_ivars(cdev, udi);
368         }
369
370         return (bus_generic_attach(dev));
371
372  fail:
373         for (i = UPA_CFG; i <= UPA_IMR2 && sc->sc_res[i] != NULL; i++)
374                 bus_release_resource(dev, SYS_RES_MEMORY,
375                     rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
376         return (ENXIO);
377 }
378
379 static int
380 upa_print_child(device_t dev, device_t child)
381 {
382         int rv;
383
384         rv = bus_print_child_header(dev, child);
385         rv += upa_print_res(device_get_ivars(child));
386         rv += bus_print_child_footer(dev, child);
387         return (rv);
388 }
389
390 static void
391 upa_probe_nomatch(device_t dev, device_t child)
392 {
393         const char *type;
394
395         device_printf(dev, "<%s>", ofw_bus_get_name(child));
396         upa_print_res(device_get_ivars(child));
397         type = ofw_bus_get_type(child);
398         printf(" type %s (no driver attached)\n",
399             type != NULL ? type : "unknown");
400 }
401
402 static struct resource *
403 upa_alloc_resource(device_t dev, device_t child, int type, int *rid,
404     u_long start, u_long end, u_long count, u_int flags)
405 {
406         struct resource_list *rl;
407         struct resource_list_entry *rle;
408         struct upa_softc *sc;
409         struct resource *rv;
410         bus_addr_t cend, cstart;
411         int i, isdefault, passthrough;
412
413         isdefault = (start == 0UL && end == ~0UL);
414         passthrough = (device_get_parent(child) != dev);
415         sc = device_get_softc(dev);
416         rl = BUS_GET_RESOURCE_LIST(dev, child);
417         rle = NULL;
418         switch (type) {
419         case SYS_RES_IRQ:
420                 return (resource_list_alloc(rl, dev, child, type, rid, start,
421                     end, count, flags));
422         case SYS_RES_MEMORY:
423                 if (!passthrough) {
424                         rle = resource_list_find(rl, type, *rid);
425                         if (rle == NULL)
426                                 return (NULL);
427                         if (rle->res != NULL)
428                                 panic("%s: resource entry is busy", __func__);
429                         if (isdefault) {
430                                 start = rle->start;
431                                 count = ulmax(count, rle->count);
432                                 end = ulmax(rle->end, start + count - 1);
433                         }
434                 }
435                 for (i = 0; i < sc->sc_nrange; i++) {
436                         cstart = sc->sc_ranges[i].child;
437                         cend = cstart + sc->sc_ranges[i].size - 1;
438                         if (start < cstart || start > cend)
439                                 continue;
440                         if (end < cstart || end > cend)
441                                 return (NULL);
442                         start += sc->sc_ranges[i].parent - cstart;
443                         end += sc->sc_ranges[i].parent - cstart;
444                         rv = bus_generic_alloc_resource(dev, child, type, rid,
445                             start, end, count, flags);
446                         if (!passthrough)
447                                 rle->res = rv;
448                         return (rv);
449                 }
450                 /* FALLTHROUGH */
451         default:
452                 return (NULL);
453         }
454 }
455
456 static void
457 upa_intr_enable(void *arg)
458 {
459         struct intr_vector *iv = arg;
460         struct upa_icarg *uica = iv->iv_icarg;
461
462         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0,
463             INTMAP_ENABLE(iv->iv_vec, iv->iv_mid));
464         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
465 }
466
467 static void
468 upa_intr_disable(void *arg)
469 {
470         struct intr_vector *iv = arg;
471         struct upa_icarg *uica = iv->iv_icarg;
472
473         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0, iv->iv_vec);
474         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
475 }
476
477 static void
478 upa_intr_assign(void *arg)
479 {
480         struct intr_vector *iv = arg;
481         struct upa_icarg *uica = iv->iv_icarg;
482
483         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0, INTMAP_TID(
484             UPA_READ(uica->uica_sc, uica->uica_imr, 0x0), iv->iv_mid));
485         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
486 }
487
488 static int
489 upa_setup_intr(device_t dev, device_t child, struct resource *ires, int flags,
490     driver_filter_t *filt, driver_intr_t *func, void *arg, void **cookiep)
491 {
492         struct upa_softc *sc;
493         u_long vec;
494
495         sc = device_get_softc(dev);
496         /*
497          * Make sure the vector is fully specified and we registered
498          * our interrupt controller for it.
499          */
500         vec = rman_get_start(ires);
501         if (INTIGN(vec) != sc->sc_ign || intr_vectors[vec].iv_ic != &upa_ic) {
502                 device_printf(dev, "invalid interrupt vector 0x%lx\n", vec);
503                 return (EINVAL);
504         }
505         return (bus_generic_setup_intr(dev, child, ires, flags, filt, func,
506             arg, cookiep));
507 }
508
509 static struct resource_list *
510 upa_get_resource_list(device_t dev, device_t child)
511 {
512         struct upa_devinfo *udi;
513
514         udi = device_get_ivars(child);
515         return (&udi->udi_rl);
516 }
517
518 static const struct ofw_bus_devinfo *
519 upa_get_devinfo(device_t dev, device_t child)
520 {
521         struct upa_devinfo *udi;
522
523         udi = device_get_ivars(child);
524         return (&udi->udi_obdinfo);
525 }
526
527 static struct upa_devinfo *
528 upa_setup_dinfo(device_t dev, struct upa_softc *sc, phandle_t node,
529     uint32_t portid)
530 {
531         struct upa_devinfo *udi;
532         struct upa_regs *reg;
533         uint32_t intr;
534         int i, nreg;
535
536         udi = malloc(sizeof(*udi), M_DEVBUF, M_WAITOK | M_ZERO);
537         if (ofw_bus_gen_setup_devinfo(&udi->udi_obdinfo, node) != 0) {
538                 free(udi, M_DEVBUF);
539                 return (NULL);
540         }
541         resource_list_init(&udi->udi_rl);
542
543         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
544         if (nreg == -1) {
545                 device_printf(dev, "<%s>: incomplete\n",
546                     udi->udi_obdinfo.obd_name);
547                 goto fail;
548         }
549         for (i = 0; i < nreg; i++)
550                 resource_list_add(&udi->udi_rl, SYS_RES_MEMORY, i, reg[i].phys,
551                     reg[i].phys + reg[i].size - 1, reg[i].size);
552         free(reg, M_OFWPROP);
553
554         intr = INTMAP_VEC(sc->sc_ign, (UPA_INO_BASE + portid));
555         resource_list_add(&udi->udi_rl, SYS_RES_IRQ, 0, intr, intr, 1);
556
557         return (udi);
558
559  fail:
560         upa_destroy_dinfo(udi);
561         return (NULL);
562 }
563
564 static void
565 upa_destroy_dinfo(struct upa_devinfo *dinfo)
566 {
567
568         resource_list_free(&dinfo->udi_rl);
569         ofw_bus_gen_destroy_devinfo(&dinfo->udi_obdinfo);
570         free(dinfo, M_DEVBUF);
571 }
572
573 static int
574 upa_print_res(struct upa_devinfo *udi)
575 {
576         int rv;
577
578         rv = 0;
579         rv += resource_list_print_type(&udi->udi_rl, "mem", SYS_RES_MEMORY,
580             "%#lx");
581         rv += resource_list_print_type(&udi->udi_rl, "irq", SYS_RES_IRQ,
582             "%ld");
583         return (rv);
584 }