obio.c revision 1.19 
1/*	$NetBSD: obio.c,v 1.19 1996/01/12 21:44:16 chuck Exp $	*/
2
3/*
4 * Copyright (c) 1993, 1994 Theo de Raadt
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 Theo de Raadt.
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/param.h>
34#include <sys/device.h>
35#include <sys/malloc.h>
36
37#ifdef DEBUG
38#include <sys/proc.h>
39#include <sys/syslog.h>
40#endif
41
42#include <vm/vm.h>
43
44#include <machine/autoconf.h>
45#include <machine/pmap.h>
46#include <machine/oldmon.h>
47#include <machine/cpu.h>
48#include <machine/ctlreg.h>
49#include <sparc/sparc/asm.h>
50#include <sparc/sparc/vaddrs.h>
51
52struct bus_softc {
53	struct	device sc_dev;		/* base device */
54	int	nothing;
55};
56
57/* autoconfiguration driver */
58static int	busmatch __P((struct device *, void *, void *));
59static void	obioattach __P((struct device *, struct device *, void *));
60#if defined(SUN4)
61static void	vmesattach __P((struct device *, struct device *, void *));
62static void	vmelattach __P((struct device *, struct device *, void *));
63static int	busattach __P((struct device *, void *, void *, int));
64void *		bus_map __P((struct rom_reg *, int, int));
65void *		bus_tmp __P((void *, int));
66void		bus_untmp __P((void));
67#endif
68
69struct cfdriver obiocd = { NULL, "obio", busmatch, obioattach,
70	DV_DULL, sizeof(struct bus_softc)
71};
72#if defined(SUN4)
73struct cfdriver vmelcd = { NULL, "vmel", busmatch, vmelattach,
74	DV_DULL, sizeof(struct bus_softc)
75};
76struct cfdriver vmescd = { NULL, "vmes", busmatch, vmesattach,
77	DV_DULL, sizeof(struct bus_softc)
78};
79#endif
80
81
82int
83busmatch(parent, vcf, aux)
84	struct device *parent;
85	void *vcf, *aux;
86{
87	struct cfdata *cf = vcf;
88	register struct confargs *ca = aux;
89	register struct romaux *ra = &ca->ca_ra;
90
91	if (cputyp != CPU_SUN4)
92		return (0);
93	return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
94}
95
96int
97busprint(args, obio)
98	void *args;
99	char *obio;
100{
101	register struct confargs *ca = args;
102
103	if (ca->ca_ra.ra_name == NULL)
104		ca->ca_ra.ra_name = "<unknown>";
105	if (obio)
106		printf("[%s at %s]", ca->ca_ra.ra_name, obio);
107	printf(" addr 0x%x", ca->ca_ra.ra_paddr);
108	if (ca->ca_ra.ra_intr[0].int_vec != -1)
109		printf(" vec 0x%x", ca->ca_ra.ra_intr[0].int_vec);
110	return (UNCONF);
111}
112
113
114int
115busattach(parent, child, args, bustype)
116	struct device *parent;
117	void *args, *child;
118	int bustype;
119{
120	struct cfdata *cf = child;
121	register struct bus_softc *sc = (struct bus_softc *)parent;
122	register struct confargs *ca = args;
123	struct confargs oca;
124	caddr_t tmp;
125
126	if (bustype == BUS_OBIO && cputyp == CPU_SUN4) {
127		/*
128		 * On the 4/100 obio addresses must be mapped at
129		 * 0x0YYYYYYY, but alias higher up (we avoid the
130		 * alias condition because it causes pmap difficulties)
131		 * XXX: We also assume that 4/[23]00 obio addresses
132		 * must be 0xZYYYYYYY, where (Z != 0)
133		 */
134		if (cpumod==SUN4_100 && (cf->cf_loc[0] & 0xf0000000))
135			return 0;
136		if (cpumod!=SUN4_100 && !(cf->cf_loc[0] & 0xf0000000))
137			return 0;
138	}
139
140	if (parent->dv_cfdata->cf_driver->cd_indirect) {
141		printf(" indirect devices not supported\n");
142		return 0;
143	}
144
145	oca.ca_ra.ra_iospace = -1;
146	oca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
147	oca.ca_ra.ra_len = 0;
148	oca.ca_ra.ra_nreg = 1;
149	tmp = NULL;
150	if (oca.ca_ra.ra_paddr)
151		tmp = bus_tmp(oca.ca_ra.ra_paddr,
152		    bustype);
153	oca.ca_ra.ra_vaddr = tmp;
154	oca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
155	if (bustype == BUS_VME16 || bustype == BUS_VME32)
156		oca.ca_ra.ra_intr[0].int_vec = cf->cf_loc[2];
157	else
158		oca.ca_ra.ra_intr[0].int_vec = -1;
159	oca.ca_ra.ra_nintr = 1;
160	oca.ca_ra.ra_name = cf->cf_driver->cd_name;
161	if (ca->ca_ra.ra_bp != NULL &&
162	  ((bustype == BUS_VME16 && strcmp(ca->ca_ra.ra_bp->name,"vmes") ==0) ||
163	   (bustype == BUS_VME32 && strcmp(ca->ca_ra.ra_bp->name,"vmel") ==0) ||
164	   (bustype == BUS_OBIO && strcmp(ca->ca_ra.ra_bp->name,"obio") == 0)))
165		oca.ca_ra.ra_bp = ca->ca_ra.ra_bp + 1;
166	else
167		oca.ca_ra.ra_bp = NULL;
168	oca.ca_bustype = bustype;
169
170	if ((*cf->cf_driver->cd_match)(parent, cf, &oca) == 0)
171		return 0;
172
173	/*
174	 * check if XXmatch routine replaced the temporary mapping with
175	 * a real mapping.   If not, then make sure we don't pass the
176	 * tmp mapping to the attach routine.
177	 */
178	if (oca.ca_ra.ra_vaddr == tmp)
179		oca.ca_ra.ra_vaddr = NULL; /* wipe out tmp address */
180	/*
181	 * the match routine will set "ra_len" if it wants us to
182	 * establish a mapping for it.
183	 * (which won't be seen on future XXmatch calls,
184	 * so not as useful as it seems.)
185	 */
186	if (oca.ca_ra.ra_len)
187		oca.ca_ra.ra_vaddr =
188		    bus_map(oca.ca_ra.ra_reg,
189		    oca.ca_ra.ra_len, oca.ca_bustype);
190
191	config_attach(parent, cf, &oca, busprint);
192	return 1;
193}
194
195#if defined(SUN4)
196int
197obio_scan(parent, child, args)
198	struct device *parent;
199	void *child, *args;
200{
201	return busattach(parent, child, args, BUS_OBIO);
202}
203#endif
204
205void
206obioattach(parent, self, args)
207	struct device *parent, *self;
208	void *args;
209{
210#if defined(SUN4)
211	if (cputyp == CPU_SUN4) {
212		if (self->dv_unit > 0) {
213			printf(" unsupported\n");
214			return;
215		}
216		printf("\n");
217
218		(void)config_search(obio_scan, self, args);
219		bus_untmp();
220	}
221#endif
222}
223
224#if defined(SUN4)
225struct intrhand **vmeints;
226
227int
228vmes_scan(parent, child, args)
229	struct device *parent;
230	void *child, *args;
231{
232	return busattach(parent, child, args, BUS_VME16);
233}
234
235void
236vmesattach(parent, self, args)
237	struct device *parent, *self;
238	void *args;
239{
240	if (self->dv_unit > 0) {
241		printf(" unsupported\n");
242		return;
243	}
244	printf("\n");
245
246	if (vmeints == NULL) {
247		vmeints = (struct intrhand **)malloc(256 *
248		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
249		bzero(vmeints, 256 * sizeof(struct intrhand *));
250	}
251	(void)config_search(vmes_scan, self, args);
252	bus_untmp();
253}
254
255int
256vmel_scan(parent, child, args)
257	struct device *parent;
258	void *child, *args;
259{
260	return busattach(parent, child, args, BUS_VME32);
261}
262
263void
264vmelattach(parent, self, args)
265	struct device *parent, *self;
266	void *args;
267{
268	if (self->dv_unit > 0) {
269		printf(" unsupported\n");
270		return;
271	}
272	printf("\n");
273
274	if (vmeints == NULL) {
275		vmeints = (struct intrhand **)malloc(256 *
276		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
277		bzero(vmeints, 256 * sizeof(struct intrhand *));
278	}
279	(void)config_search(vmel_scan, self, args);
280	bus_untmp();
281}
282
283int pil_to_vme[] = {
284	-1,	/* pil 0 */
285	-1,	/* pil 1 */
286	1,	/* pil 2 */
287	2,	/* pil 3 */
288	-1,	/* pil 4 */
289	3,	/* pil 5 */
290	-1,	/* pil 6 */
291	4,	/* pil 7 */
292	-1,	/* pil 8 */
293	5,	/* pil 9 */
294	-1,	/* pil 10 */
295	6,	/* pil 11 */
296	-1,	/* pil 12 */
297	7,	/* pil 13 */
298	-1,	/* pil 14 */
299	-1,	/* pil 15 */
300};
301
302int
303vmeintr(arg)
304	void *arg;
305{
306	int level = (int)arg, vec;
307	struct intrhand *ih;
308	int i = 0;
309
310	vec = ldcontrolb(AC_VMEINTVEC | (pil_to_vme[level] << 1) | 1);
311	if (vec == -1) {
312		printf("vme: spurious interrupt\n");
313		return 0;
314	}
315
316	for (ih = vmeints[vec]; ih; ih = ih->ih_next)
317		if (ih->ih_fun)
318			i += (ih->ih_fun)(ih->ih_arg);
319	return (i);
320}
321
322void
323vmeintr_establish(vec, level, ih)
324	int vec, level;
325	struct intrhand *ih;
326{
327	struct intrhand *ihs;
328
329	if (vec == -1)
330		panic("vmeintr_establish: uninitialized vec\n");
331
332	if (vmeints[vec] == NULL)
333		vmeints[vec] = ih;
334	else {
335		for (ihs = vmeints[vec]; ihs->ih_next; ihs = ihs->ih_next)
336			;
337		ihs->ih_next = ih;
338	}
339
340	/* ensure the interrupt subsystem will call us at this level */
341	for (ihs = intrhand[level]; ihs; ihs = ihs->ih_next)
342		if (ihs->ih_fun == vmeintr)
343			return;
344
345	ihs = (struct intrhand *)malloc(sizeof(struct intrhand),
346	    M_TEMP, M_NOWAIT);
347	if (ihs == NULL)
348		panic("vme_addirq");
349	bzero(ihs, sizeof *ihs);
350	ihs->ih_fun = vmeintr;
351	ihs->ih_arg = (void *)level;
352	intr_establish(level, ihs);
353}
354
355#define	getpte(va)		lda(va, ASI_PTE)
356
357/*
358 * If we can find a mapping that was established by the rom, use it.
359 * Else, create a new mapping.
360 */
361void *
362bus_map(pa, len, bustype)
363	struct rom_reg *pa;
364	int len;
365	int bustype;
366{
367	u_long	pf = (u_long)(pa->rr_paddr) >> PGSHIFT;
368	u_long	va, pte;
369	int pgtype;
370
371	switch (bt2pmt[bustype]) {
372	case PMAP_OBIO:
373		pgtype = PG_OBIO;
374		break;
375	case PMAP_VME32:
376		pgtype = PG_VME32;
377		break;
378	case PMAP_VME16:
379		pgtype = PG_VME16;
380		break;
381	}
382
383	if (len <= NBPG) {
384		for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) {
385			pte = getpte(va);
386			if ((pte & PG_V) != 0 && (pte & PG_TYPE) == pgtype &&
387			    (pte & PG_PFNUM) == pf)
388				return ((void *)
389				    (va | ((u_long)pa->rr_paddr & PGOFSET)) );
390					/* note: preserve page offset */
391		}
392	}
393	return mapiodev(pa, 0, len, bustype);
394}
395
396void *
397bus_tmp(pa, bustype)
398	void *pa;
399	int bustype;
400{
401	vm_offset_t addr = (vm_offset_t)pa & ~PGOFSET;
402	int pmtype = bt2pmt[bustype];
403
404	pmap_enter(pmap_kernel(), TMPMAP_VA,
405	    addr | pmtype | PMAP_NC,
406	    VM_PROT_READ | VM_PROT_WRITE, 1);
407	return ((void *)(TMPMAP_VA | ((u_long) pa & PGOFSET)) );
408}
409
410void
411bus_untmp()
412{
413	pmap_remove(pmap_kernel(), TMPMAP_VA, TMPMAP_VA+NBPG);
414}
415#endif
416