obio.c revision 1.11 
1/*	$NetBSD: obio.c,v 1.11 1995/02/01 12:37:26 pk 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 *));
60static void	vmesattach __P((struct device *, struct device *, void *));
61static void	vmelattach __P((struct device *, struct device *, void *));
62
63struct cfdriver obiocd = { NULL, "obio", busmatch, obioattach,
64	DV_DULL, sizeof(struct bus_softc)
65};
66struct cfdriver vmelcd = { NULL, "vmel", busmatch, vmelattach,
67	DV_DULL, sizeof(struct bus_softc)
68};
69struct cfdriver vmescd = { NULL, "vmes", busmatch, vmesattach,
70	DV_DULL, sizeof(struct bus_softc)
71};
72
73static void	busattach __P((struct device *, struct device *, void *, int));
74
75void *		bus_map __P((void *, int, int));
76void *		bus_tmp __P((void *, int));
77void		bus_untmp __P((void));
78
79int
80busmatch(parent, vcf, aux)
81	struct device *parent;
82	void *vcf, *aux;
83{
84	struct cfdata *cf = vcf;
85	register struct confargs *ca = aux;
86	register struct romaux *ra = &ca->ca_ra;
87
88	if (cputyp != CPU_SUN4)
89		return (0);
90	return (strcmp(cf->cf_driver->cd_name, ra->ra_name) == 0);
91}
92
93int
94busprint(args, obio)
95	void *args;
96	char *obio;
97{
98	register struct confargs *ca = args;
99
100	if (ca->ca_ra.ra_name == NULL)
101		ca->ca_ra.ra_name = "<unknown>";
102	if (obio)
103		printf("[%s at %s]", ca->ca_ra.ra_name, obio);
104	printf(" addr %x", ca->ca_ra.ra_paddr);
105	if (ca->ca_ra.ra_intr[0].int_vec != -1)
106		printf(" vec 0x%x", ca->ca_ra.ra_intr[0].int_vec);
107	return (UNCONF);
108}
109
110void
111busattach(parent, self, args, bustype)
112	struct device *parent, *self;
113	void *args;
114	int bustype;
115{
116	register struct bus_softc *sc = (struct bus_softc *)self;
117	extern struct cfdata cfdata[];
118	register struct confargs *ca = args;
119	struct confargs oca;
120	register short *p;
121	struct cfdata *cf;
122	caddr_t tmp;
123
124	if (sc->sc_dev.dv_unit > 0) {
125		printf(" unsupported\n");
126		return;
127	}
128
129	printf("\n");
130
131	for (cf = cfdata; cf->cf_driver; cf++) {
132		if (cf->cf_fstate == FSTATE_FOUND)
133			continue;
134		for (p = cf->cf_parents; *p >= 0; p++)
135			if (self->dv_cfdata == &cfdata[*p]) {
136				oca.ca_ra.ra_iospace = -1;
137				oca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
138				oca.ca_ra.ra_len = 0;
139				oca.ca_ra.ra_nreg = 1;
140				tmp = NULL;
141				if (oca.ca_ra.ra_paddr)
142					tmp = bus_tmp(oca.ca_ra.ra_paddr,
143					    bustype);
144				oca.ca_ra.ra_vaddr = tmp;
145				oca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
146				if (bustype == BUS_VME16 || bustype == BUS_VME32)
147					oca.ca_ra.ra_intr[0].int_vec = cf->cf_loc[2];
148				else
149					oca.ca_ra.ra_intr[0].int_vec = -1;
150				oca.ca_ra.ra_nintr = 1;
151				oca.ca_ra.ra_name = cf->cf_driver->cd_name;
152				oca.ca_ra.ra_bp = ca->ca_ra.ra_bp;
153				oca.ca_bustype = bustype;
154
155				if ((*cf->cf_driver->cd_match)(self, cf, &oca) == 0)
156					continue;
157
158				/*
159				 * check if XXmatch routine replaced the
160				 * temporary mapping with a real mapping.
161				 */
162				if (tmp == oca.ca_ra.ra_vaddr)
163					oca.ca_ra.ra_vaddr = NULL;
164				/*
165				 * or if it has asked us to create a mapping..
166				 * (which won't be seen on future XXmatch calls,
167				 * so not as useful as it seems.)
168				 */
169				if (oca.ca_ra.ra_len)
170					oca.ca_ra.ra_vaddr =
171					    bus_map(oca.ca_ra.ra_paddr,
172					    oca.ca_ra.ra_len, oca.ca_bustype);
173
174				config_attach(self, cf, &oca, busprint);
175			}
176	}
177	bus_untmp();
178}
179
180void
181obioattach(parent, self, args)
182	struct device *parent, *self;
183	void *args;
184{
185	busattach(parent, self, args, BUS_OBIO);
186}
187
188struct intrhand **vmeints;
189
190void
191vmesattach(parent, self, args)
192	struct device *parent, *self;
193	void *args;
194{
195	if (vmeints == NULL) {
196		vmeints = (struct intrhand **)malloc(256 *
197		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
198		bzero(vmeints, 256 * sizeof(struct intrhand *));
199	}
200	busattach(parent, self, args, BUS_VME16);
201}
202
203void
204vmelattach(parent, self, args)
205	struct device *parent, *self;
206	void *args;
207{
208	if (vmeints == NULL) {
209		vmeints = (struct intrhand **)malloc(256 *
210		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
211		bzero(vmeints, 256 * sizeof(struct intrhand *));
212	}
213	busattach(parent, self, args, BUS_VME32);
214}
215
216int pil_to_vme[] = {
217	-1,	/* pil 0 */
218	-1,	/* pil 1 */
219	1,	/* pil 2 */
220	2,	/* pil 3 */
221	-1,	/* pil 4 */
222	3,	/* pil 5 */
223	-1,	/* pil 6 */
224	4,	/* pil 7 */
225	-1,	/* pil 8 */
226	5,	/* pil 9 */
227	-1,	/* pil 10 */
228	6,	/* pil 11 */
229	-1,	/* pil 12 */
230	7,	/* pil 13 */
231	-1,	/* pil 14 */
232	-1,	/* pil 15 */
233};
234
235int
236vmeintr(arg)
237	void *arg;
238{
239	int level = (int)arg, vec;
240	struct intrhand *ih;
241	int i = 0;
242
243	vec = ldcontrolb(AC_VMEINTVEC | (pil_to_vme[level] << 1) | 1);
244	if (vec == -1) {
245		printf("vme: spurious interrupt\n");
246		return 0;
247	}
248
249	for (ih = vmeints[vec]; ih; ih = ih->ih_next)
250		if (ih->ih_fun)
251			i += (ih->ih_fun)(ih->ih_arg);
252	return (i);
253}
254
255void
256vmeintr_establish(vec, level, ih)
257	int vec, level;
258	struct intrhand *ih;
259{
260	struct intrhand *ihs;
261
262	if (vec == -1)
263		panic("vmeintr_establish: uninitialized vec\n");
264
265	if (vmeints[vec] == NULL)
266		vmeints[vec] = ih;
267	else {
268		for (ihs = vmeints[vec]; ihs->ih_next; ihs = ihs->ih_next)
269			;
270		ihs->ih_next = ih;
271	}
272
273	/* ensure the interrupt subsystem will call us at this level */
274	for (ihs = intrhand[level]; ihs; ihs = ihs->ih_next)
275		if (ihs->ih_fun == vmeintr)
276			return;
277
278	ihs = (struct intrhand *)malloc(sizeof(struct intrhand),
279	    M_TEMP, M_NOWAIT);
280	if (ihs == NULL)
281		panic("vme_addirq");
282	bzero(ihs, sizeof *ihs);
283	ihs->ih_fun = vmeintr;
284	ihs->ih_arg = (void *)level;
285	intr_establish(level, ihs);
286}
287
288#define	getpte(va)		lda(va, ASI_PTE)
289
290/*
291 * If we can find a mapping that was established by the rom, use it.
292 * Else, create a new mapping.
293 */
294void *
295bus_map(pa, len, bustype)
296	void *pa;
297	int len;
298	int bustype;
299{
300	u_long	pf = (u_long)pa >> PGSHIFT;
301	u_long	va, pte;
302	int pgtype;
303
304	switch (bt2pmt[bustype]) {
305	case PMAP_OBIO:
306		pgtype = PG_OBIO;
307		break;
308	case PMAP_VME32:
309		pgtype = PG_VME32;
310		break;
311	case PMAP_VME16:
312		pgtype = PG_VME16;
313		break;
314	}
315
316	if (len <= NBPG) {
317		for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) {
318			pte = getpte(va);
319			if ((pte & PG_V) != 0 && (pte & PG_TYPE) == pgtype &&
320			    (pte & PG_PFNUM) == pf)
321				return ((void *)va);
322		}
323	}
324	return mapiodev(pa, len, bustype);
325}
326
327void *
328bus_tmp(pa, bustype)
329	void *pa;
330	int bustype;
331{
332	vm_offset_t addr = (vm_offset_t)pa & ~PGOFSET;
333	int pmtype = bt2pmt[bustype];
334
335	pmap_enter(kernel_pmap, TMPMAP_VA,
336	    addr | pmtype | PMAP_NC,
337	    VM_PROT_READ | VM_PROT_WRITE, 1);
338	return ((void *)TMPMAP_VA);
339}
340
341void
342bus_untmp()
343{
344	pmap_remove(kernel_pmap, TMPMAP_VA, TMPMAP_VA+NBPG);
345}
346