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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/pcpu.h>
36 #include <sys/resource.h>
37 #include <sys/rman.h>
38
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/ofw_bus_subr.h>
41 #include <dev/ofw/openfirm.h>
42
43 #include <machine/bus.h>
44 #include <machine/bus_common.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
139         /* ofw_bus interface */
140         DEVMETHOD(ofw_bus_get_devinfo,  upa_get_devinfo),
141         DEVMETHOD(ofw_bus_get_compat,   ofw_bus_gen_get_compat),
142         DEVMETHOD(ofw_bus_get_model,    ofw_bus_gen_get_model),
143         DEVMETHOD(ofw_bus_get_name,     ofw_bus_gen_get_name),
144         DEVMETHOD(ofw_bus_get_node,     ofw_bus_gen_get_node),
145         DEVMETHOD(ofw_bus_get_type,     ofw_bus_gen_get_type),
146
147         KOBJMETHOD_END
148 };
149
150 static devclass_t upa_devclass;
151
152 DEFINE_CLASS_0(upa, upa_driver, upa_methods, sizeof(struct upa_softc));
153 DRIVER_MODULE(upa, nexus, upa_driver, upa_devclass, 0, 0);
154
155 static const struct intr_controller upa_ic = {
156         upa_intr_enable,
157         upa_intr_disable,
158         upa_intr_assign,
159         /* The interrupts are pulse type and thus automatically cleared. */
160         NULL
161 };
162
163 struct upa_icarg {
164         struct upa_softc        *uica_sc;
165         u_int                   uica_imr;
166 };
167
168 static int
169 upa_probe(device_t dev)
170 {
171         const char* compat;
172
173         compat = ofw_bus_get_compat(dev);
174         if (compat != NULL && strcmp(ofw_bus_get_name(dev), "upa") == 0 &&
175             strcmp(compat, "upa64s") == 0) {
176                 device_set_desc(dev, "UPA bridge");
177                 return (BUS_PROBE_DEFAULT);
178         }
179         return (ENXIO);
180 }
181
182 static int
183 upa_attach(device_t dev)
184 {
185         struct upa_devinfo *udi;
186         struct upa_icarg *uica;
187         struct upa_softc *sc;
188         phandle_t child, node;
189         device_t cdev;
190         uint32_t portid;
191         int i, imr, j, rid;
192 #if 1
193         device_t *children, schizo;
194         u_long scount, sstart, ucount, ustart;
195         int nchildren;
196 #endif
197
198         sc = device_get_softc(dev);
199         node = ofw_bus_get_node(dev);
200         for (i = UPA_CFG; i <= UPA_IMR2; i++) {
201                 rid = i;
202                 /*
203                  * The UPA_IMR{1,2} resources are shared with that of the
204                  * Schizo PCI bus B CSR bank.
205                  */
206 #if 0
207                 sc->sc_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
208                     &rid, ((i == UPA_IMR1 || i == UPA_IMR2) ? RF_SHAREABLE :
209                     0) | RF_ACTIVE);
210                 if (sc->sc_res[i] == NULL) {
211                         device_printf(dev,
212                             "could not allocate resource %d\n", i);
213                         goto fail;
214                 }
215                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
216                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
217 #else
218                 /*
219                  * Workaround for the fact that rman(9) only allows to
220                  * share resources of the same size.
221                  */
222                 if (i == UPA_IMR1 || i == UPA_IMR2) {
223                         if (bus_get_resource(dev, SYS_RES_MEMORY, i, &ustart,
224                             &ucount) != 0) {
225                                 device_printf(dev,
226                                     "could not determine UPA resource\n");
227                                 goto fail;
228                         }
229                         if (device_get_children(device_get_parent(dev),
230                             &children, &nchildren) != 0) {
231                                 device_printf(dev, "could not get children\n");
232                                 goto fail;
233                         }
234                         schizo = NULL;
235                         for (j = 0; j < nchildren; j++) {
236                                 if (ofw_bus_get_type(children[j]) != NULL &&
237                                     strcmp(ofw_bus_get_type(children[j]),
238                                     "pci") == 0 &&
239                                     ofw_bus_get_compat(children[j]) != NULL &&
240                                     strcmp(ofw_bus_get_compat(children[j]),
241                                     "pci108e,8001") == 0 &&
242                                     ((bus_get_resource_start(children[j],
243                                     SYS_RES_MEMORY, 0) >> 20) & 1) == 1) {
244                                         schizo = children[j];
245                                         break;
246                                 }
247                         }
248                         free(children, M_TEMP);
249                         if (schizo == NULL) {
250                                 device_printf(dev, "could not find Schizo\n");
251                                 goto fail;
252                         }
253                         if (bus_get_resource(schizo, SYS_RES_MEMORY, 0,
254                             &sstart, &scount) != 0) {
255                                 device_printf(dev,
256                                     "could not determine Schizo resource\n");
257                                 goto fail;
258                         }
259                         sc->sc_res[i] = bus_alloc_resource(dev, SYS_RES_MEMORY,
260                             &rid, sstart, sstart + scount - 1, scount,
261                             RF_SHAREABLE | RF_ACTIVE);
262                 } else
263                         sc->sc_res[i] = bus_alloc_resource_any(dev,
264                             SYS_RES_MEMORY, &rid, RF_ACTIVE);
265                 if (sc->sc_res[i] == NULL) {
266                         device_printf(dev,
267                             "could not allocate resource %d\n", i);
268                         goto fail;
269                 }
270                 sc->sc_bt[i] = rman_get_bustag(sc->sc_res[i]);
271                 sc->sc_bh[i] = rman_get_bushandle(sc->sc_res[i]);
272                 if (i == UPA_IMR1 || i == UPA_IMR2)
273                         bus_space_subregion(sc->sc_bt[i], sc->sc_bh[i],
274                             ustart - sstart, ucount, &sc->sc_bh[i]);
275 #endif
276         }
277
278         if (OF_getprop(node, "portid", &sc->sc_ign, sizeof(sc->sc_ign)) == -1) {
279                 device_printf(dev, "could not determine IGN\n");
280                 goto fail;
281         }
282
283         sc->sc_nrange = OF_getprop_alloc(node, "ranges", sizeof(*sc->sc_ranges),
284             (void **)&sc->sc_ranges);
285         if (sc->sc_nrange == -1) {
286                 device_printf(dev, "could not determine ranges\n");
287                 goto fail;
288         }
289
290         /*
291          * Hunt through all the interrupt mapping regs and register our
292          * interrupt controller for the corresponding interrupt vectors.
293          * We do this early in order to be able to catch stray interrupts.
294          */
295         for (i = UPA_INO_BASE; i <= UPA_INO_MAX; i++) {
296                 imr = 0;
297                 for (j = UPA_IMR1; j <= UPA_IMR2; j++) {
298                         if (INTVEC(UPA_READ(sc, j, 0x0)) ==
299                             INTMAP_VEC(sc->sc_ign, i)) {
300                                 imr = j;
301                                 break;
302                         }
303                 }
304                 if (imr == 0)
305                         continue;
306                 uica = malloc(sizeof(*uica), M_DEVBUF, M_NOWAIT);
307                 if (uica == NULL)
308                         panic("%s: could not allocate interrupt controller "
309                             "argument", __func__);
310                 uica->uica_sc = sc;
311                 uica->uica_imr = imr;
312 #ifdef UPA_DEBUG
313                 device_printf(dev, "intr map (INO %d) IMR%d: %#lx\n",
314                     i, imr, (u_long)UPA_READ(sc, imr, 0x0));
315 #endif
316                 j = intr_controller_register(INTMAP_VEC(sc->sc_ign, i),
317                     &upa_ic, uica);
318                 if (j != 0)
319                         device_printf(dev, "could not register interrupt "
320                             "controller for INO %d (%d)\n", i, j);
321         }
322
323         /* Make sure the power level is appropriate for normal operation. */
324         if (UPA_READ(sc, UPA_CFG, UPA_CFG_IF) != UPA_CFG_IF_POK) {
325                 if (bootverbose)
326                         device_printf(dev, "applying power\n");
327                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_ESTAR, UPA_CFG_ESTAR_SPEED_1_2);
328                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_ESTAR, UPA_CFG_ESTAR_SPEED_FULL);
329                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_ESTAR);
330                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_IF, UPA_CFG_IF_POK_RST);
331                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_IF);
332                 DELAY(20000);
333                 UPA_WRITE(sc, UPA_CFG, UPA_CFG_IF, UPA_CFG_IF_POK);
334                 (void)UPA_READ(sc, UPA_CFG, UPA_CFG_IF);
335         }
336
337         for (child = OF_child(node); child != 0; child = OF_peer(child)) {
338                 /*
339                  * The `upa-portid' properties of the children are used as
340                  * index for the interrupt mapping registers.
341                  * The `upa-portid' properties are also used to make up the
342                  * INOs of the children as the values contained in their
343                  * `interrupts' properties are bogus.
344                  */
345                 if (OF_getprop(child, "upa-portid", &portid,
346                     sizeof(portid)) == -1) {
347                         device_printf(dev,
348                             "could not determine upa-portid of child 0x%lx\n",
349                             (unsigned long)child);
350                         continue;
351                 }
352                 if (portid > 1) {
353                         device_printf(dev,
354                             "upa-portid %d of child 0x%lx invalid\n", portid,
355                             (unsigned long)child);
356                         continue;
357                 }
358                 if ((udi = upa_setup_dinfo(dev, sc, child, portid)) == NULL)
359                         continue;
360                 if ((cdev = device_add_child(dev, NULL, -1)) == NULL) {
361                         device_printf(dev, "<%s>: device_add_child failed\n",
362                             udi->udi_obdinfo.obd_name);
363                         upa_destroy_dinfo(udi);
364                         continue;
365                 }
366                 device_set_ivars(cdev, udi);
367         }
368
369         return (bus_generic_attach(dev));
370
371  fail:
372         for (i = UPA_CFG; i <= UPA_IMR2 && sc->sc_res[i] != NULL; i++)
373                 bus_release_resource(dev, SYS_RES_MEMORY,
374                     rman_get_rid(sc->sc_res[i]), sc->sc_res[i]);
375         return (ENXIO);
376 }
377
378 static int
379 upa_print_child(device_t dev, device_t child)
380 {
381         int rv;
382
383         rv = bus_print_child_header(dev, child);
384         rv += upa_print_res(device_get_ivars(child));
385         rv += bus_print_child_footer(dev, child);
386         return (rv);
387 }
388
389 static void
390 upa_probe_nomatch(device_t dev, device_t child)
391 {
392         const char *type;
393
394         device_printf(dev, "<%s>", ofw_bus_get_name(child));
395         upa_print_res(device_get_ivars(child));
396         type = ofw_bus_get_type(child);
397         printf(" type %s (no driver attached)\n",
398             type != NULL ? type : "unknown");
399 }
400
401 static struct resource *
402 upa_alloc_resource(device_t dev, device_t child, int type, int *rid,
403     u_long start, u_long end, u_long count, u_int flags)
404 {
405         struct resource_list *rl;
406         struct resource_list_entry *rle;
407         struct upa_softc *sc;
408         struct resource *rv;
409         bus_addr_t cend, cstart;
410         int i, isdefault, passthrough;
411
412         isdefault = (start == 0UL && end == ~0UL);
413         passthrough = (device_get_parent(child) != dev);
414         sc = device_get_softc(dev);
415         rl = BUS_GET_RESOURCE_LIST(dev, child);
416         rle = NULL;
417         switch (type) {
418         case SYS_RES_IRQ:
419                 return (resource_list_alloc(rl, dev, child, type, rid, start,
420                     end, count, flags));
421         case SYS_RES_MEMORY:
422                 if (!passthrough) {
423                         rle = resource_list_find(rl, type, *rid);
424                         if (rle == NULL)
425                                 return (NULL);
426                         if (rle->res != NULL)
427                                 panic("%s: resource entry is busy", __func__);
428                         if (isdefault) {
429                                 start = rle->start;
430                                 count = ulmax(count, rle->count);
431                                 end = ulmax(rle->end, start + count - 1);
432                         }
433                 }
434                 for (i = 0; i < sc->sc_nrange; i++) {
435                         cstart = sc->sc_ranges[i].child;
436                         cend = cstart + sc->sc_ranges[i].size - 1;
437                         if (start < cstart || start > cend)
438                                 continue;
439                         if (end < cstart || end > cend)
440                                 return (NULL);
441                         start += sc->sc_ranges[i].parent - cstart;
442                         end += sc->sc_ranges[i].parent - cstart;
443                         rv = bus_generic_alloc_resource(dev, child, type, rid,
444                             start, end, count, flags);
445                         if (!passthrough)
446                                 rle->res = rv;
447                         return (rv);
448                 }
449                 /* FALLTHROUGH */
450         default:
451                 return (NULL);
452         }
453 }
454
455 static void
456 upa_intr_enable(void *arg)
457 {
458         struct intr_vector *iv = arg;
459         struct upa_icarg *uica = iv->iv_icarg;
460
461         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0,
462             INTMAP_ENABLE(iv->iv_vec, iv->iv_mid));
463         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
464 }
465
466 static void
467 upa_intr_disable(void *arg)
468 {
469         struct intr_vector *iv = arg;
470         struct upa_icarg *uica = iv->iv_icarg;
471
472         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0, iv->iv_vec);
473         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
474 }
475
476 static void
477 upa_intr_assign(void *arg)
478 {
479         struct intr_vector *iv = arg;
480         struct upa_icarg *uica = iv->iv_icarg;
481
482         UPA_WRITE(uica->uica_sc, uica->uica_imr, 0x0, INTMAP_TID(
483             UPA_READ(uica->uica_sc, uica->uica_imr, 0x0), iv->iv_mid));
484         (void)UPA_READ(uica->uica_sc, uica->uica_imr, 0x0);
485 }
486
487 static int
488 upa_setup_intr(device_t dev, device_t child, struct resource *ires, int flags,
489     driver_filter_t *filt, driver_intr_t *func, void *arg, void **cookiep)
490 {
491         struct upa_softc *sc;
492         u_long vec;
493
494         sc = device_get_softc(dev);
495         /*
496          * Make sure the vector is fully specified and we registered
497          * our interrupt controller for it.
498          */
499         vec = rman_get_start(ires);
500         if (INTIGN(vec) != sc->sc_ign || intr_vectors[vec].iv_ic != &upa_ic) {
501                 device_printf(dev, "invalid interrupt vector 0x%lx\n", vec);
502                 return (EINVAL);
503         }
504         return (bus_generic_setup_intr(dev, child, ires, flags, filt, func,
505             arg, cookiep));
506 }
507
508 static struct resource_list *
509 upa_get_resource_list(device_t dev, device_t child)
510 {
511         struct upa_devinfo *udi;
512
513         udi = device_get_ivars(child);
514         return (&udi->udi_rl);
515 }
516
517 static const struct ofw_bus_devinfo *
518 upa_get_devinfo(device_t dev, device_t child)
519 {
520         struct upa_devinfo *udi;
521
522         udi = device_get_ivars(child);
523         return (&udi->udi_obdinfo);
524 }
525
526 static struct upa_devinfo *
527 upa_setup_dinfo(device_t dev, struct upa_softc *sc, phandle_t node,
528     uint32_t portid)
529 {
530         struct upa_devinfo *udi;
531         struct upa_regs *reg;
532         uint32_t intr;
533         int i, nreg;
534
535         udi = malloc(sizeof(*udi), M_DEVBUF, M_WAITOK | M_ZERO);
536         if (ofw_bus_gen_setup_devinfo(&udi->udi_obdinfo, node) != 0) {
537                 free(udi, M_DEVBUF);
538                 return (NULL);
539         }
540         resource_list_init(&udi->udi_rl);
541
542         nreg = OF_getprop_alloc(node, "reg", sizeof(*reg), (void **)&reg);
543         if (nreg == -1) {
544                 device_printf(dev, "<%s>: incomplete\n",
545                     udi->udi_obdinfo.obd_name);
546                 goto fail;
547         }
548         for (i = 0; i < nreg; i++)
549                 resource_list_add(&udi->udi_rl, SYS_RES_MEMORY, i, reg[i].phys,
550                     reg[i].phys + reg[i].size - 1, reg[i].size);
551         free(reg, M_OFWPROP);
552
553         intr = INTMAP_VEC(sc->sc_ign, (UPA_INO_BASE + portid));
554         resource_list_add(&udi->udi_rl, SYS_RES_IRQ, 0, intr, intr, 1);
555
556         return (udi);
557
558  fail:
559         upa_destroy_dinfo(udi);
560         return (NULL);
561 }
562
563 static void
564 upa_destroy_dinfo(struct upa_devinfo *dinfo)
565 {
566
567         resource_list_free(&dinfo->udi_rl);
568         ofw_bus_gen_destroy_devinfo(&dinfo->udi_obdinfo);
569         free(dinfo, M_DEVBUF);
570 }
571
572 static int
573 upa_print_res(struct upa_devinfo *udi)
574 {
575         int rv;
576
577         rv = 0;
578         rv += resource_list_print_type(&udi->udi_rl, "mem", SYS_RES_MEMORY,
579             "%#lx");
580         rv += resource_list_print_type(&udi->udi_rl, "irq", SYS_RES_IRQ,
581             "%ld");
582         return (rv);
583 }