xref: /titanic_41/usr/src/uts/i86pc/io/isa.c (revision 54925bf60766fbb4f1f2d7c843721406a7b7a3fb)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 /*
29  *	ISA bus nexus driver
30  */
31 
32 #include <sys/types.h>
33 #include <sys/cmn_err.h>
34 #include <sys/conf.h>
35 #include <sys/modctl.h>
36 #include <sys/autoconf.h>
37 #include <sys/errno.h>
38 #include <sys/debug.h>
39 #include <sys/kmem.h>
40 #include <sys/psm.h>
41 #include <sys/ddidmareq.h>
42 #include <sys/ddi_impldefs.h>
43 #include <sys/dma_engine.h>
44 #include <sys/ddi.h>
45 #include <sys/sunddi.h>
46 #include <sys/sunndi.h>
47 #include <sys/acpi/acpi_enum.h>
48 
49 extern int isa_resource_setup(void);
50 static char USED_RESOURCES[] = "used-resources";
51 static void isa_alloc_nodes(dev_info_t *);
52 static void enumerate_BIOS_serial(dev_info_t *);
53 
54 #define	BIOS_DATA_AREA	0x400
55 /*
56  * #define ISA_DEBUG 1
57  */
58 
59 /*
60  *      Local data
61  */
62 static ddi_dma_lim_t ISA_dma_limits = {
63 	0,		/* address low				*/
64 	0x00ffffff,	/* address high				*/
65 	0,		/* counter max				*/
66 	1,		/* burstsize				*/
67 	DMA_UNIT_8,	/* minimum xfer				*/
68 	0,		/* dma speed				*/
69 	(uint_t)DMALIM_VER0, /* version				*/
70 	0x0000ffff,	/* address register			*/
71 	0x0000ffff,	/* counter register			*/
72 	1,		/* sector size				*/
73 	0x00000001,	/* scatter/gather list length		*/
74 	(uint_t)0xffffffff /* request size			*/
75 };
76 
77 static ddi_dma_attr_t ISA_dma_attr = {
78 	DMA_ATTR_V0,
79 	(unsigned long long)0,
80 	(unsigned long long)0x00ffffff,
81 	0x0000ffff,
82 	1,
83 	1,
84 	1,
85 	(unsigned long long)0xffffffff,
86 	(unsigned long long)0x0000ffff,
87 	1,
88 	1,
89 	0
90 };
91 
92 
93 /*
94  * Config information
95  */
96 
97 static int
98 isa_dma_allochdl(dev_info_t *, dev_info_t *, ddi_dma_attr_t *,
99     int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *);
100 
101 static int
102 isa_dma_mctl(dev_info_t *, dev_info_t *, ddi_dma_handle_t, enum ddi_dma_ctlops,
103     off_t *, size_t *, caddr_t *, uint_t);
104 
105 static int
106 isa_ctlops(dev_info_t *, dev_info_t *, ddi_ctl_enum_t, void *, void *);
107 
108 struct bus_ops isa_bus_ops = {
109 	BUSO_REV,
110 	i_ddi_bus_map,
111 	NULL,
112 	NULL,
113 	NULL,
114 	i_ddi_map_fault,
115 	ddi_dma_map,
116 	isa_dma_allochdl,
117 	ddi_dma_freehdl,
118 	ddi_dma_bindhdl,
119 	ddi_dma_unbindhdl,
120 	ddi_dma_flush,
121 	ddi_dma_win,
122 	isa_dma_mctl,
123 	isa_ctlops,
124 	ddi_bus_prop_op,
125 	NULL,		/* (*bus_get_eventcookie)();	*/
126 	NULL,		/* (*bus_add_eventcall)();	*/
127 	NULL,		/* (*bus_remove_eventcall)();	*/
128 	NULL,		/* (*bus_post_event)();		*/
129 	NULL,		/* (*bus_intr_ctl)(); */
130 	NULL,		/* (*bus_config)(); */
131 	NULL,		/* (*bus_unconfig)(); */
132 	NULL,		/* (*bus_fm_init)(); */
133 	NULL,		/* (*bus_fm_fini)(); */
134 	NULL,		/* (*bus_fm_access_enter)(); */
135 	NULL,		/* (*bus_fm_access_exit)(); */
136 	NULL,		/* (*bus_power)(); */
137 	i_ddi_intr_ops	/* (*bus_intr_op)(); */
138 };
139 
140 
141 static int isa_attach(dev_info_t *devi, ddi_attach_cmd_t cmd);
142 
143 /*
144  * Internal isa ctlops support routines
145  */
146 static int isa_initchild(dev_info_t *child);
147 
148 struct dev_ops isa_ops = {
149 	DEVO_REV,		/* devo_rev, */
150 	0,			/* refcnt  */
151 	ddi_no_info,		/* info */
152 	nulldev,		/* identify */
153 	nulldev,		/* probe */
154 	isa_attach,		/* attach */
155 	nodev,			/* detach */
156 	nodev,			/* reset */
157 	(struct cb_ops *)0,	/* driver operations */
158 	&isa_bus_ops	/* bus operations */
159 
160 };
161 
162 /*
163  * Module linkage information for the kernel.
164  */
165 
166 static struct modldrv modldrv = {
167 	&mod_driverops, /* Type of module.  This is ISA bus driver */
168 	"isa nexus driver for 'ISA' %I%",
169 	&isa_ops,	/* driver ops */
170 };
171 
172 static struct modlinkage modlinkage = {
173 	MODREV_1,
174 	&modldrv,
175 	NULL
176 };
177 
178 int
179 _init(void)
180 {
181 	return (mod_install(&modlinkage));
182 }
183 
184 int
185 _fini(void)
186 {
187 	return (mod_remove(&modlinkage));
188 }
189 
190 int
191 _info(struct modinfo *modinfop)
192 {
193 	return (mod_info(&modlinkage, modinfop));
194 }
195 
196 static int
197 isa_attach(dev_info_t *devi, ddi_attach_cmd_t cmd)
198 {
199 	int rval;
200 
201 	if (cmd != DDI_ATTACH)
202 		return (DDI_FAILURE);
203 
204 	if ((rval = i_dmae_init(devi)) == DDI_SUCCESS) {
205 		ddi_report_dev(devi);
206 		/*
207 		 * Enumerate children -- invoking ACPICA
208 		 * This is normally in bus_config(), but we need this
209 		 * to happen earlier to boot.
210 		 */
211 		isa_alloc_nodes(devi);
212 	}
213 	return (rval);
214 }
215 
216 static int
217 isa_dma_allochdl(dev_info_t *dip, dev_info_t *rdip, ddi_dma_attr_t *dma_attr,
218     int (*waitfp)(caddr_t), caddr_t arg, ddi_dma_handle_t *handlep)
219 {
220 	ddi_dma_attr_merge(dma_attr, &ISA_dma_attr);
221 	return (ddi_dma_allochdl(dip, rdip, dma_attr, waitfp, arg, handlep));
222 }
223 
224 static int
225 isa_dma_mctl(dev_info_t *dip, dev_info_t *rdip,
226     ddi_dma_handle_t handle, enum ddi_dma_ctlops request,
227     off_t *offp, size_t *lenp, caddr_t *objp, uint_t flags)
228 {
229 	int rval;
230 	ddi_dma_lim_t defalt;
231 	int arg = (int)(uintptr_t)objp;
232 
233 	switch (request) {
234 
235 	case DDI_DMA_E_PROG:
236 		return (i_dmae_prog(rdip, (struct ddi_dmae_req *)offp,
237 		    (ddi_dma_cookie_t *)lenp, arg));
238 
239 	case DDI_DMA_E_ACQUIRE:
240 		return (i_dmae_acquire(rdip, arg, (int(*)(caddr_t))offp,
241 		    (caddr_t)lenp));
242 
243 	case DDI_DMA_E_FREE:
244 		return (i_dmae_free(rdip, arg));
245 
246 	case DDI_DMA_E_STOP:
247 		i_dmae_stop(rdip, arg);
248 		return (DDI_SUCCESS);
249 
250 	case DDI_DMA_E_ENABLE:
251 		i_dmae_enable(rdip, arg);
252 		return (DDI_SUCCESS);
253 
254 	case DDI_DMA_E_DISABLE:
255 		i_dmae_disable(rdip, arg);
256 		return (DDI_SUCCESS);
257 
258 	case DDI_DMA_E_GETCNT:
259 		i_dmae_get_chan_stat(rdip, arg, NULL, (int *)lenp);
260 		return (DDI_SUCCESS);
261 
262 	case DDI_DMA_E_SWSETUP:
263 		return (i_dmae_swsetup(rdip, (struct ddi_dmae_req *)offp,
264 		    (ddi_dma_cookie_t *)lenp, arg));
265 
266 	case DDI_DMA_E_SWSTART:
267 		i_dmae_swstart(rdip, arg);
268 		return (DDI_SUCCESS);
269 
270 	case DDI_DMA_E_GETLIM:
271 		bcopy(&ISA_dma_limits, objp, sizeof (ddi_dma_lim_t));
272 		return (DDI_SUCCESS);
273 
274 	case DDI_DMA_E_GETATTR:
275 		bcopy(&ISA_dma_attr, objp, sizeof (ddi_dma_attr_t));
276 		return (DDI_SUCCESS);
277 
278 	case DDI_DMA_E_1STPTY:
279 		{
280 			struct ddi_dmae_req req1stpty =
281 			    { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
282 			if (arg == 0) {
283 				req1stpty.der_command = DMAE_CMD_TRAN;
284 				req1stpty.der_trans = DMAE_TRANS_DMND;
285 			} else {
286 				req1stpty.der_trans = DMAE_TRANS_CSCD;
287 			}
288 			return (i_dmae_prog(rdip, &req1stpty, NULL, arg));
289 		}
290 
291 	case DDI_DMA_IOPB_ALLOC:	/* get contiguous DMA-able memory */
292 	case DDI_DMA_SMEM_ALLOC:
293 		if (!offp) {
294 			defalt = ISA_dma_limits;
295 			offp = (off_t *)&defalt;
296 		}
297 		/*FALLTHROUGH*/
298 	default:
299 		rval = ddi_dma_mctl(dip, rdip, handle, request, offp,
300 		    lenp, objp, flags);
301 	}
302 	return (rval);
303 }
304 
305 /*
306  * Check if driver should be treated as an old pre 2.6 driver
307  */
308 static int
309 old_driver(dev_info_t *dip)
310 {
311 	extern int ignore_hardware_nodes;	/* force flag from ddi_impl.c */
312 
313 	if (ndi_dev_is_persistent_node(dip)) {
314 		if (ignore_hardware_nodes)
315 			return (1);
316 		if (ddi_getprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS,
317 		    "ignore-hardware-nodes", -1) != -1)
318 			return (1);
319 	}
320 	return (0);
321 }
322 
323 typedef struct {
324 	uint32_t phys_hi;
325 	uint32_t phys_lo;
326 	uint32_t size;
327 } isa_regs_t;
328 
329 /*
330  * Return non-zero if device in tree is a PnP isa device
331  */
332 static int
333 is_pnpisa(dev_info_t *dip)
334 {
335 	isa_regs_t *isa_regs;
336 	int proplen, pnpisa;
337 
338 	if (ndi_dev_is_persistent_node(dip) == 0)
339 		return (0);
340 	if (ddi_getlongprop(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "reg",
341 		(caddr_t)&isa_regs, &proplen) != DDI_PROP_SUCCESS) {
342 		return (0);
343 	}
344 	pnpisa = isa_regs[0].phys_hi & 0x80000000;
345 	/*
346 	 * free the memory allocated by ddi_getlongprop().
347 	 */
348 	kmem_free(isa_regs, proplen);
349 	if (pnpisa)
350 		return (1);
351 	else
352 		return (0);
353 }
354 
355 /*ARGSUSED*/
356 static int
357 isa_ctlops(dev_info_t *dip, dev_info_t *rdip,
358 	ddi_ctl_enum_t ctlop, void *arg, void *result)
359 {
360 	switch (ctlop) {
361 	case DDI_CTLOPS_REPORTDEV:
362 		if (rdip == (dev_info_t *)0)
363 			return (DDI_FAILURE);
364 		cmn_err(CE_CONT, "?ISA-device: %s%d\n",
365 		    ddi_driver_name(rdip), ddi_get_instance(rdip));
366 		return (DDI_SUCCESS);
367 
368 	case DDI_CTLOPS_INITCHILD:
369 		/*
370 		 * older drivers aren't expecting the "standard" device
371 		 * node format used by the hardware nodes.  these drivers
372 		 * only expect their own properties set in their driver.conf
373 		 * files.  so they tell us not to call them with hardware
374 		 * nodes by setting the property "ignore-hardware-nodes".
375 		 */
376 		if (old_driver((dev_info_t *)arg)) {
377 			return (DDI_NOT_WELL_FORMED);
378 		}
379 
380 		return (isa_initchild((dev_info_t *)arg));
381 
382 	case DDI_CTLOPS_UNINITCHILD:
383 		impl_ddi_sunbus_removechild((dev_info_t *)arg);
384 		return (DDI_SUCCESS);
385 
386 	case DDI_CTLOPS_SIDDEV:
387 		/*
388 		 * All ISA devices need to do confirming probes
389 		 * unless they are PnP ISA.
390 		 */
391 		if (is_pnpisa(dip))
392 			return (DDI_SUCCESS);
393 		else
394 			return (DDI_FAILURE);
395 
396 	default:
397 		return (ddi_ctlops(dip, rdip, ctlop, arg, result));
398 	}
399 }
400 
401 static void
402 isa_vendor(uint32_t id, char *vendor)
403 {
404 	vendor[0] = '@' + ((id >> 26) & 0x1f);
405 	vendor[1] = '@' + ((id >> 21) & 0x1f);
406 	vendor[2] = '@' + ((id >> 16) & 0x1f);
407 	vendor[3] = 0;
408 }
409 
410 /*
411  * Name a child
412  */
413 static int
414 isa_name_child(dev_info_t *child, char *name, int namelen)
415 {
416 	char vendor[8];
417 	int device;
418 	uint32_t serial;
419 	int func;
420 	int bustype;
421 	uint32_t base;
422 	int proplen;
423 	int pnpisa = 0;
424 	isa_regs_t *isa_regs;
425 
426 	void make_ddi_ppd(dev_info_t *, struct ddi_parent_private_data **);
427 
428 	/*
429 	 * older drivers aren't expecting the "standard" device
430 	 * node format used by the hardware nodes.  these drivers
431 	 * only expect their own properties set in their driver.conf
432 	 * files.  so they tell us not to call them with hardware
433 	 * nodes by setting the property "ignore-hardware-nodes".
434 	 */
435 	if (old_driver(child))
436 		return (DDI_FAILURE);
437 
438 	/*
439 	 * Fill in parent-private data
440 	 */
441 	if (ddi_get_parent_data(child) == NULL) {
442 		struct ddi_parent_private_data *pdptr;
443 		make_ddi_ppd(child, &pdptr);
444 		ddi_set_parent_data(child, pdptr);
445 	}
446 
447 	if (ndi_dev_is_persistent_node(child) == 0) {
448 		/*
449 		 * For .conf nodes, generate name from parent private data
450 		 */
451 		name[0] = '\0';
452 		if (sparc_pd_getnreg(child) > 0) {
453 			(void) snprintf(name, namelen, "%x,%x",
454 			    (uint_t)sparc_pd_getreg(child, 0)->regspec_bustype,
455 			    (uint_t)sparc_pd_getreg(child, 0)->regspec_addr);
456 		}
457 		return (DDI_SUCCESS);
458 	}
459 
460 	/*
461 	 * For hw nodes, look up "reg" property
462 	 */
463 	if (ddi_getlongprop(DDI_DEV_T_ANY, child, DDI_PROP_DONTPASS, "reg",
464 	    (caddr_t)&isa_regs, &proplen) != DDI_PROP_SUCCESS) {
465 		return (DDI_FAILURE);
466 	}
467 
468 	/*
469 	 * extract the device identifications
470 	 */
471 	pnpisa = isa_regs[0].phys_hi & 0x80000000;
472 	if (pnpisa) {
473 		isa_vendor(isa_regs[0].phys_hi, vendor);
474 		device = isa_regs[0].phys_hi & 0xffff;
475 		serial = isa_regs[0].phys_lo;
476 		func = (isa_regs[0].size >> 24) & 0xff;
477 		if (func != 0)
478 			(void) snprintf(name, namelen, "pnp%s,%04x,%x,%x",
479 			    vendor, device, serial, func);
480 		else
481 			(void) snprintf(name, namelen, "pnp%s,%04x,%x",
482 			    vendor, device, serial);
483 	} else {
484 		bustype = isa_regs[0].phys_hi;
485 		base = isa_regs[0].phys_lo;
486 		(void) sprintf(name, "%x,%x", bustype, base);
487 	}
488 
489 	/*
490 	 * free the memory allocated by ddi_getlongprop().
491 	 */
492 	kmem_free(isa_regs, proplen);
493 
494 	return (DDI_SUCCESS);
495 }
496 
497 static int
498 isa_initchild(dev_info_t *child)
499 {
500 	char name[80];
501 
502 	if (isa_name_child(child, name, 80) != DDI_SUCCESS)
503 		return (DDI_FAILURE);
504 	ddi_set_name_addr(child, name);
505 
506 	if (ndi_dev_is_persistent_node(child) != 0)
507 		return (DDI_SUCCESS);
508 
509 	/*
510 	 * This is a .conf node, try merge properties onto a
511 	 * hw node with the same name.
512 	 */
513 	if (ndi_merge_node(child, isa_name_child) == DDI_SUCCESS) {
514 		/*
515 		 * Return failure to remove node
516 		 */
517 		impl_ddi_sunbus_removechild(child);
518 		return (DDI_FAILURE);
519 	}
520 	/*
521 	 * Cannot merge node, permit pseudo children
522 	 */
523 	return (DDI_SUCCESS);
524 }
525 
526 /*
527  * called when ACPI enumeration is not used
528  */
529 static void
530 add_known_used_resources(void)
531 {
532 	/* needs to be in increasing order */
533 	int intr[] = {0x1, 0x3, 0x4, 0x6, 0x7, 0xc};
534 	int dma[] = {0x2};
535 	int io[] = {0x60, 0x1, 0x64, 0x1, 0x2f8, 0x8, 0x378, 0x8, 0x3f0, 0x10,
536 	    0x778, 0x4};
537 	dev_info_t *usedrdip;
538 
539 	usedrdip = ddi_find_devinfo(USED_RESOURCES, -1, 0);
540 
541 	if (usedrdip == NULL) {
542 		(void) ndi_devi_alloc_sleep(ddi_root_node(), USED_RESOURCES,
543 		    (pnode_t)DEVI_SID_NODEID, &usedrdip);
544 	}
545 
546 	(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
547 	    "interrupts", (int *)intr, (int)(sizeof (intr) / sizeof (int)));
548 	(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
549 	    "io-space", (int *)io, (int)(sizeof (io) / sizeof (int)));
550 	(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, usedrdip,
551 	    "dma-channels", (int *)dma, (int)(sizeof (dma) / sizeof (int)));
552 	(void) ndi_devi_bind_driver(usedrdip, 0);
553 
554 }
555 
556 static void
557 isa_alloc_nodes(dev_info_t *isa_dip)
558 {
559 	static int alloced = 0;
560 	int circ, i;
561 	dev_info_t *xdip;
562 
563 	/* hard coded isa stuff */
564 	struct regspec asy_regs[] = {
565 		{1, 0x3f8, 0x8},
566 		{1, 0x2f8, 0x8}
567 	};
568 	int asy_intrs[] = {0x4, 0x3};
569 
570 	struct regspec i8042_regs[] = {
571 		{1, 0x60, 0x1},
572 		{1, 0x64, 0x1}
573 	};
574 	int i8042_intrs[] = {0x1, 0xc};
575 	char *acpi_prop;
576 	int acpi_enum = 1; /* ACPI is default to be on */
577 
578 	if (alloced)
579 		return;
580 
581 	ndi_devi_enter(isa_dip, &circ);
582 	if (alloced) {	/* just in case we are multi-threaded */
583 		ndi_devi_exit(isa_dip, circ);
584 		return;
585 	}
586 	alloced = 1;
587 
588 	if (ddi_prop_lookup_string(DDI_DEV_T_ANY, ddi_root_node(),
589 	    DDI_PROP_DONTPASS, "acpi-enum", &acpi_prop) == DDI_PROP_SUCCESS) {
590 		acpi_enum = strcmp("off", acpi_prop);
591 		ddi_prop_free(acpi_prop);
592 	}
593 
594 	if (acpi_enum) {
595 		if (acpi_isa_device_enum(isa_dip)) {
596 			ndi_devi_exit(isa_dip, circ);
597 			if (isa_resource_setup() != NDI_SUCCESS) {
598 				cmn_err(CE_WARN, "isa nexus: isa "
599 				    "resource setup failed");
600 			}
601 
602 			/* serial ports? */
603 			enumerate_BIOS_serial(isa_dip);
604 			return;
605 		}
606 		cmn_err(CE_NOTE, "!Solaris did not detect ACPI BIOS");
607 	}
608 	cmn_err(CE_NOTE, "!ACPI is off");
609 
610 	/* serial ports */
611 	for (i = 0; i < 2; i++) {
612 		ndi_devi_alloc_sleep(isa_dip, "asy",
613 		    (pnode_t)DEVI_SID_NODEID, &xdip);
614 		(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
615 		    "reg", (int *)&asy_regs[i], 3);
616 		(void) ndi_prop_update_int(DDI_DEV_T_NONE, xdip,
617 		    "interrupts", asy_intrs[i]);
618 		(void) ndi_devi_bind_driver(xdip, 0);
619 	}
620 
621 	/* i8042 node */
622 	ndi_devi_alloc_sleep(isa_dip, "i8042",
623 	    (pnode_t)DEVI_SID_NODEID, &xdip);
624 	(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
625 	    "reg", (int *)i8042_regs, 6);
626 	(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
627 	    "interrupts", (int *)i8042_intrs, 2);
628 	(void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
629 	    "unit-address", "1,60");
630 	(void) ndi_devi_bind_driver(xdip, 0);
631 
632 	add_known_used_resources();
633 
634 	ndi_devi_exit(isa_dip, circ);
635 
636 }
637 
638 /*
639  * On some machines, serial port 2 isn't listed in the ACPI table.
640  * This function goes through the BIOS data area and makes sure all
641  * the serial ports there are in the dev_info tree.  If any are missing,
642  * this function will add them.
643  */
644 
645 static int num_BIOS_serial = 2;	/* number of BIOS serial ports to look at */
646 
647 static void
648 enumerate_BIOS_serial(dev_info_t *isa_dip)
649 {
650 	ushort_t *bios_data;
651 	int i;
652 	dev_info_t *xdip;
653 	int found;
654 	int ret;
655 	struct regspec *tmpregs;
656 	int tmpregs_len;
657 	static struct regspec tmp_asy_regs[] = {
658 		{1, 0x3f8, 0x8},
659 	};
660 	static int default_asy_intrs[] = { 4, 3, 4, 3 };
661 	static size_t size = 4;
662 
663 	/*
664 	 * The first four 2-byte quantities of the BIOS data area contain
665 	 * the base I/O addresses of the first four serial ports.
666 	 */
667 	bios_data = (ushort_t *)psm_map_new((paddr_t)BIOS_DATA_AREA, size,
668 		PSM_PROT_READ);
669 	for (i = 0; i < num_BIOS_serial; i++) {
670 		if (bios_data[i] == 0) {
671 			/* no COM[i]: port */
672 			continue;
673 		}
674 
675 		/* Look for it in the dev_info tree */
676 		found = 0;
677 		for (xdip = ddi_get_child(isa_dip); xdip != NULL;
678 		    xdip = ddi_get_next_sibling(xdip)) {
679 			if (strncmp(ddi_node_name(xdip), "asy", 3) != 0) {
680 				/* skip non asy */
681 				continue;
682 			}
683 
684 			/* Match by addr */
685 			ret = ddi_prop_lookup_int_array(DDI_DEV_T_ANY, xdip,
686 				DDI_PROP_DONTPASS, "reg", (int **)&tmpregs,
687 				(uint_t *)&tmpregs_len);
688 			if (ret != DDI_PROP_SUCCESS) {
689 				/* error */
690 				continue;
691 			}
692 
693 			if (tmpregs->regspec_addr == bios_data[i])
694 				found = 1;
695 
696 			/*
697 			 * Free the memory allocated by
698 			 * ddi_prop_lookup_int_array().
699 			 */
700 			ddi_prop_free(tmpregs);
701 		}
702 
703 		/* If not found, then add it */
704 		if (!found) {
705 			ndi_devi_alloc_sleep(isa_dip, "asy",
706 			    (pnode_t)DEVI_SID_NODEID, &xdip);
707 			(void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
708 			    "compatible", "PNP0500");
709 			/* This should be gotten from master file: */
710 			(void) ndi_prop_update_string(DDI_DEV_T_NONE, xdip,
711 			    "model", "Standard PC COM port");
712 			tmp_asy_regs[0].regspec_addr = bios_data[i];
713 			(void) ndi_prop_update_int_array(DDI_DEV_T_NONE, xdip,
714 			    "reg", (int *)&tmp_asy_regs[0], 3);
715 			(void) ndi_prop_update_int(DDI_DEV_T_NONE, xdip,
716 			    "interrupts", default_asy_intrs[i]);
717 			(void) ndi_devi_bind_driver(xdip, 0);
718 		}
719 	}
720 
721 	psm_unmap((caddr_t)bios_data, size);
722 }
723