autoconf.c revision 1.102 
1/*	$NetBSD: autoconf.c,v 1.102 2009/03/18 10:22:23 cegger Exp $	*/
2
3/*
4 * Copyright (c) 1994 Christian E. Hopps
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *      This product includes software developed by Christian E. Hopps.
18 * 4. The name of the author may not be used to endorse or promote products
19 *    derived from this software without specific prior written permission
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33#include <sys/cdefs.h>
34__KERNEL_RCSID(0, "$NetBSD: autoconf.c,v 1.102 2009/03/18 10:22:23 cegger Exp $");
35
36#include <sys/param.h>
37#include <sys/systm.h>
38#include <sys/reboot.h>
39#include <sys/conf.h>
40#include <sys/buf.h>
41#include <sys/device.h>
42#include <sys/disklabel.h>
43#include <sys/disk.h>
44#include <sys/proc.h>
45#include <machine/cpu.h>
46#include <amiga/amiga/cfdev.h>
47#include <amiga/amiga/device.h>
48#include <amiga/amiga/custom.h>
49
50static void findroot(void);
51void mbattach(struct device *, struct device *, void *);
52int mbprint(void *, const char *);
53int mbmatch(struct device *, struct cfdata *, void *);
54
55#include <sys/kernel.h>
56
57u_long boot_partition;
58
59int amiga_realconfig;
60
61/*
62 * called at boot time, configure all devices on system
63 */
64void
65cpu_configure(void)
66{
67	int s;
68#ifdef DEBUG_KERNEL_START
69	int i;
70#endif
71
72	/*
73	 * this is the real thing baby (i.e. not console init)
74	 */
75	amiga_realconfig = 1;
76#ifdef DRACO
77	if (is_draco()) {
78		*draco_intena &= ~DRIRQ_GLOBAL;
79	} else
80#endif
81	custom.intena = INTF_INTEN;
82	s = splhigh();
83
84	if (config_rootfound("mainbus", NULL) == NULL)
85		panic("no mainbus found");
86
87#ifdef DEBUG_KERNEL_START
88	printf("survived autoconf, going to enable interrupts\n");
89#endif
90
91#ifdef DRACO
92	if (is_draco()) {
93		*draco_intena |= DRIRQ_GLOBAL;
94		/* softints always enabled */
95	} else
96#endif
97	{
98		custom.intena = INTF_SETCLR | INTF_INTEN;
99
100		/* also enable hardware aided software interrupts */
101		custom.intena = INTF_SETCLR | INTF_SOFTINT;
102	}
103#ifdef DEBUG_KERNEL_START
104	for (i=splhigh(); i>=s ;i-=0x100) {
105		splx(i);
106		printf("%d...", (i>>8) & 7);
107	}
108	printf("survived interrupt enable\n");
109#else
110	splx(s);
111#endif
112#ifdef DEBUG_KERNEL_START
113	printf("survived configure...\n");
114#endif
115}
116
117void
118cpu_rootconf(void)
119{
120	findroot();
121#ifdef DEBUG_KERNEL_START
122	printf("survived findroot()\n");
123#endif
124	setroot(booted_device, booted_partition);
125#ifdef DEBUG_KERNEL_START
126	printf("survived setroot()\n");
127#endif
128}
129
130/*ARGSUSED*/
131int
132simple_devprint(void *auxp, const char *pnp)
133{
134	return(QUIET);
135}
136
137int
138matchname(const char *fp, const char *sp)
139{
140	int len;
141
142	len = strlen(fp);
143	if (strlen(sp) != len)
144		return(0);
145	if (bcmp(fp, sp, len) == 0)
146		return(1);
147	return(0);
148}
149
150/*
151 * use config_search_ia to find appropriate device, then call that device
152 * directly with NULL device variable storage.  A device can then
153 * always tell the difference betwean the real and console init
154 * by checking for NULL.
155 */
156int
157amiga_config_found(struct cfdata *pcfp, struct device *pdp, void *auxp, cfprint_t pfn)
158{
159	struct device temp;
160	struct cfdata *cf;
161	const struct cfattach *ca;
162
163	if (amiga_realconfig)
164		return(config_found(pdp, auxp, pfn) != NULL);
165
166	if (pdp == NULL) {
167		memset(&temp, 0, sizeof temp);
168		pdp = &temp;
169	}
170
171	pdp->dv_cfdata = pcfp;
172	pdp->dv_cfdriver = config_cfdriver_lookup(pcfp->cf_name);
173	pdp->dv_unit = pcfp->cf_unit;
174
175	if ((cf = config_search_ia(NULL, pdp, NULL, auxp)) != NULL) {
176		ca = config_cfattach_lookup(cf->cf_name, cf->cf_atname);
177		if (ca != NULL) {
178			(*ca->ca_attach)(pdp, NULL, auxp);
179			pdp->dv_cfdata = NULL;
180			return(1);
181		}
182	}
183	pdp->dv_cfdata = NULL;
184	return(0);
185}
186
187/*
188 * this function needs to get enough configured to do a console
189 * basically this means start attaching the grfxx's that support
190 * the console. Kinda hacky but it works.
191 */
192void
193config_console(void)
194{
195	struct cfdata *cf;
196
197	config_init();
198
199	/*
200	 * we need mainbus' cfdata.
201	 */
202	cf = config_rootsearch(NULL, "mainbus", NULL);
203	if (cf == NULL) {
204		panic("no mainbus");
205	}
206	/*
207	 * delay clock calibration.
208	 */
209	amiga_config_found(cf, NULL, __UNCONST("clock"), NULL);
210
211	/*
212	 * internal grf.
213	 */
214#ifdef DRACO
215	if (!(is_draco()))
216#endif
217		amiga_config_found(cf, NULL, __UNCONST("grfcc"), NULL);
218
219	/*
220	 * zbus knows when its not for real and will
221	 * only configure the appropriate hardware
222	 */
223	amiga_config_found(cf, NULL, __UNCONST("zbus"), NULL);
224}
225
226/*
227 * mainbus driver
228 */
229CFATTACH_DECL(mainbus, sizeof(struct device),
230    mbmatch, mbattach, NULL, NULL);
231
232int
233mbmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
234{
235#if 0	/*
236	 * XXX is this right? but we need to be found twice
237	 * (early console init hack)
238	 */
239	static int mainbus_matched = 0;
240
241	/* Allow only one instance. */
242	if (mainbus_matched)
243		return (0);
244
245	mainbus_matched = 1;
246#endif
247	return (1);
248}
249
250/*
251 * "find" all the things that should be there.
252 */
253void
254mbattach(struct device *pdp, struct device *dp, void *auxp)
255{
256	printf("\n");
257	config_found(dp, __UNCONST("clock"), simple_devprint);
258	if (is_a3000() || is_a4000()) {
259		config_found(dp, __UNCONST("a34kbbc"), simple_devprint);
260	} else
261#ifdef DRACO
262	if (!is_draco())
263#endif
264	{
265		config_found(dp, __UNCONST("a2kbbc"), simple_devprint);
266	}
267#ifdef DRACO
268	if (is_draco()) {
269		config_found(dp, __UNCONST("drbbc"), simple_devprint);
270		config_found(dp, __UNCONST("kbd"), simple_devprint);
271		config_found(dp, __UNCONST("drsc"), simple_devprint);
272		config_found(dp, __UNCONST("drsupio"), simple_devprint);
273	} else
274#endif
275	{
276		config_found(dp, __UNCONST("ser"), simple_devprint);
277		config_found(dp, __UNCONST("par"), simple_devprint);
278		config_found(dp, __UNCONST("kbd"), simple_devprint);
279		config_found(dp, __UNCONST("ms"), simple_devprint);
280		config_found(dp, __UNCONST("grfcc"), simple_devprint);
281		config_found(dp, __UNCONST("amidisplaycc"), simple_devprint);
282		config_found(dp, __UNCONST("fdc"), simple_devprint);
283	}
284	if (is_a4000() || is_a1200()) {
285		config_found(dp, __UNCONST("wdc"), simple_devprint);
286		config_found(dp, __UNCONST("idesc"), simple_devprint);
287	}
288	if (is_a4000())			/* Try to configure A4000T SCSI */
289		config_found(dp, __UNCONST("afsc"), simple_devprint);
290	if (is_a3000())
291		config_found(dp, __UNCONST("ahsc"), simple_devprint);
292	if (/*is_a600() || */is_a1200())
293		config_found(dp, __UNCONST("pccard"), simple_devprint);
294#ifdef DRACO
295	if (!is_draco())
296#endif
297		config_found(dp, __UNCONST("aucc"), simple_devprint);
298
299	config_found(dp, __UNCONST("zbus"), simple_devprint);
300}
301
302int
303mbprint(void *auxp, const char *pnp)
304{
305	if (pnp)
306		aprint_normal("%s at %s", (char *)auxp, pnp);
307	return(UNCONF);
308}
309
310/*
311 * The system will assign the "booted device" indicator (and thus
312 * rootdev if rootspec is wildcarded) to the first partition 'a'
313 * in preference of boot.  However, it does walk unit backwards
314 * to remain compatible with the old Amiga method of picking the
315 * last root found.
316 */
317#include <sys/fcntl.h>		/* XXXX and all that uses it */
318#include <sys/proc.h>		/* XXXX and all that uses it */
319
320#include "fd.h"
321#include "sd.h"
322#include "cd.h"
323#include "wd.h"
324
325#if NFD > 0
326extern  struct cfdriver fd_cd;
327extern	const struct bdevsw fd_bdevsw;
328#endif
329#if NSD > 0
330extern  struct cfdriver sd_cd;
331extern	const struct bdevsw sd_bdevsw;
332#endif
333#if NCD > 0
334extern  struct cfdriver cd_cd;
335extern	const struct bdevsw cd_bdevsw;
336#endif
337#if NWD > 0
338extern  struct cfdriver wd_cd;
339extern	const struct bdevsw wd_bdevsw;
340#endif
341
342struct cfdriver *genericconf[] = {
343#if NFD > 0
344	&fd_cd,
345#endif
346#if NSD > 0
347	&sd_cd,
348#endif
349#if NWD > 0
350	&wd_cd,
351#endif
352#if NCD > 0
353	&cd_cd,
354#endif
355	NULL,
356};
357
358void
359findroot(void)
360{
361	struct disk *dkp;
362	struct partition *pp;
363	device_t *devs;
364	int i, maj, unit;
365	const struct bdevsw *bdp;
366
367#if NSD > 0
368	/*
369	 * If we have the boot partition offset (boot_partition), try
370	 * to locate the device corresponding to that partition.
371	 */
372#ifdef DEBUG_KERNEL_START
373	printf("Boot partition offset is %ld\n", boot_partition);
374#endif
375	if (boot_partition != 0) {
376
377		for (unit = 0; unit < sd_cd.cd_ndevs; ++unit) {
378#ifdef DEBUG_KERNEL_START
379			printf("probing for sd%d\n", unit);
380#endif
381			if (device_lookup(&sd_cd,unit) == NULL)
382				continue;
383
384			/*
385			 * Find the disk corresponding to the current
386			 * device.
387			 */
388			devs = (device_t *)sd_cd.cd_devs;
389			if ((dkp = disk_find(device_xname(device_lookup(&sd_cd, unit)))) == NULL)
390				continue;
391
392			if (dkp->dk_driver == NULL ||
393			    dkp->dk_driver->d_strategy == NULL)
394				continue;
395			bdp = &sd_bdevsw;
396			maj = bdevsw_lookup_major(bdp);
397			if ((*bdp->d_open)(MAKEDISKDEV(maj, unit, RAW_PART),
398			    FREAD | FNONBLOCK, 0, curlwp))
399				continue;
400			(*bdp->d_close)(MAKEDISKDEV(maj, unit, RAW_PART),
401			    FREAD | FNONBLOCK, 0, curlwp);
402			pp = &dkp->dk_label->d_partitions[0];
403			for (i = 0; i < dkp->dk_label->d_npartitions;
404			    i++, pp++) {
405#ifdef DEBUG_KERNEL_START
406				printf("sd%d%c type %d offset %d size %d\n",
407					unit, i+'a', pp->p_fstype,
408					pp->p_offset, pp->p_size);
409#endif
410				if (pp->p_size == 0 ||
411				    (pp->p_fstype != FS_BSDFFS &&
412				    pp->p_fstype != FS_SWAP))
413					continue;
414				if (pp->p_offset == boot_partition) {
415					if (booted_device == NULL) {
416						booted_device = devs[unit];
417						booted_partition = i;
418					} else
419						printf("Ambiguous boot device\n");
420				}
421			}
422		}
423	}
424	if (booted_device != NULL)
425		return;		/* we found the boot device */
426#endif
427
428	for (i = 0; genericconf[i] != NULL; i++) {
429		for (unit = genericconf[i]->cd_ndevs - 1; unit >= 0; unit--) {
430			if (genericconf[i]->cd_devs[unit] == NULL)
431				continue;
432
433			/*
434			 * Find the disk structure corresponding to the
435			 * current device.
436			 */
437			devs = (device_t *)genericconf[i]->cd_devs;
438			if ((dkp = disk_find(device_xname(devs[unit]))) == NULL)
439				continue;
440
441			if (dkp->dk_driver == NULL ||
442			    dkp->dk_driver->d_strategy == NULL)
443				continue;
444
445			bdp = NULL;
446#if NFD > 0
447			if (fd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
448				bdp = &fd_bdevsw;
449#endif
450#if NSD > 0
451			if (sd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
452				bdp = &sd_bdevsw;
453#endif
454#if NWD > 0
455			if (wd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
456				bdp = &wd_bdevsw;
457#endif
458#if NCD > 0
459			if (cd_bdevsw.d_strategy == dkp->dk_driver->d_strategy)
460				bdp = &cd_bdevsw;
461#endif
462#ifdef DIAGNOSTIC
463			if (bdp == NULL)
464				panic("findroot: impossible");
465#endif
466			maj = bdevsw_lookup_major(bdp);
467
468			/* Open disk; forces read of disklabel. */
469			if ((*bdp->d_open)(MAKEDISKDEV(maj,
470			    unit, 0), FREAD|FNONBLOCK, 0, &lwp0))
471				continue;
472			(void)(*bdp->d_close)(MAKEDISKDEV(maj,
473			    unit, 0), FREAD|FNONBLOCK, 0, &lwp0);
474
475			pp = &dkp->dk_label->d_partitions[0];
476			if (pp->p_size != 0 && pp->p_fstype == FS_BSDFFS) {
477				booted_device = devs[unit];
478				booted_partition = 0;
479				return;
480			}
481		}
482	}
483}
484
485/*
486 * Try to determine, of this machine is an A3000, which has a builtin
487 * realtime clock and scsi controller, so that this hardware is only
488 * included as "configured" if this IS an A3000
489 */
490
491int a3000_flag = 1;		/* patchable */
492#ifdef A4000
493int a4000_flag = 1;		/* patchable - default to A4000 */
494#else
495int a4000_flag = 0;		/* patchable */
496#endif
497
498int
499is_a3000()
500{
501	/* this is a dirty kludge.. but how do you do this RIGHT ? :-) */
502	extern long boot_fphystart;
503	short sc;
504
505	if ((machineid >> 16) == 3000)
506		return (1);			/* It's an A3000 */
507	if (machineid >> 16)
508		return (0);			/* It's not an A3000 */
509	/* Machine type is unknown, so try to guess it */
510	/* where is fastram on the A4000 ?? */
511	/* if fastram is below 0x07000000, assume it's not an A3000 */
512	if (boot_fphystart < 0x07000000)
513		return(0);
514	/*
515	 * OK, fastram starts at or above 0x07000000, check specific
516	 * machines
517	 */
518	for (sc = 0; sc < ncfdev; sc++) {
519		switch (cfdev[sc].rom.manid) {
520		case 2026:		/* Progressive Peripherals, Inc */
521			switch (cfdev[sc].rom.prodid) {
522			case 0:		/* PPI Mercury - A3000 */
523			case 1:		/* PP&S A3000 '040 */
524				return(1);
525			case 150:	/* PPI Zeus - it's an A2000 */
526			case 105:	/* PP&S A2000 '040 */
527			case 187:	/* PP&S A500 '040 */
528				return(0);
529			}
530			break;
531
532		case 2112:			/* IVS */
533			switch (cfdev[sc].rom.prodid) {
534			case 242:
535				return(0);	/* A2000 accelerator? */
536			}
537			break;
538		}
539	}
540	return (a3000_flag);		/* XXX let flag tell now */
541}
542
543int
544is_a4000()
545{
546	if ((machineid >> 16) == 4000)
547		return (1);		/* It's an A4000 */
548	if ((machineid >> 16) == 1200)
549		return (0);		/* It's an A1200, so not A4000 */
550#ifdef DRACO
551	if (is_draco())
552		return (0);
553#endif
554	/* Do I need this any more? */
555	if ((custom.deniseid & 0xff) == 0xf8)
556		return (1);
557#ifdef DEBUG
558	if (a4000_flag)
559		printf("Denise ID = %04x\n", (unsigned short)custom.deniseid);
560#endif
561	if (machineid >> 16)
562		return (0);		/* It's not an A4000 */
563	return (a4000_flag);		/* Machine type not set */
564}
565
566int
567is_a1200()
568{
569	if ((machineid >> 16) == 1200)
570		return (1);		/* It's an A1200 */
571	return (0);			/* Machine type not set */
572}
573