obio.c revision 1.13 
1/*	$NetBSD: obio.c,v 1.13 1995/04/10 16:48:34 mycroft 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		if (bustype == BUS_OBIO && cputyp == CPU_SUN4) {
135			/*
136			 * On the 4/100 obio addresses must be mapped at
137			 * 0x0YYYYYYY, but alias higher up (we avoid the
138			 * alias condition because it causes pmap difficulties)
139			 * XXX: We also assume that 4/[23]00 obio addresses
140			 * must be 0xZYYYYYYY, where (Z != 0)
141			 */
142			if (cpumod==SUN4_100 && (cf->cf_loc[0] & 0xf0000000))
143				continue;
144			if (cpumod!=SUN4_100 && !(cf->cf_loc[0] & 0xf0000000))
145				continue;
146		}
147		for (p = cf->cf_parents; *p >= 0; p++)
148			if (self->dv_cfdata == &cfdata[*p]) {
149				oca.ca_ra.ra_iospace = -1;
150				oca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
151				oca.ca_ra.ra_len = 0;
152				oca.ca_ra.ra_nreg = 1;
153				tmp = NULL;
154				if (oca.ca_ra.ra_paddr != (void *)-1)
155					tmp = bus_tmp(oca.ca_ra.ra_paddr,
156					    bustype);
157				oca.ca_ra.ra_vaddr = tmp;
158				oca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
159				if (bustype == BUS_VME16 || bustype == BUS_VME32)
160					oca.ca_ra.ra_intr[0].int_vec = cf->cf_loc[2];
161				else
162					oca.ca_ra.ra_intr[0].int_vec = -1;
163				oca.ca_ra.ra_nintr = 1;
164				oca.ca_ra.ra_name = cf->cf_driver->cd_name;
165				if (ca->ca_ra.ra_bp != NULL &&
166				    strcmp(ca->ca_ra.ra_bp->name, "sbus") == 0)
167					oca.ca_ra.ra_bp = ca->ca_ra.ra_bp + 1;
168				else
169					oca.ca_ra.ra_bp = NULL;
170				oca.ca_bustype = bustype;
171
172				if ((*cf->cf_driver->cd_match)(self, cf, &oca) == 0)
173					continue;
174
175				/*
176				 * check if XXmatch routine replaced the
177				 * temporary mapping with a real mapping.
178				 */
179				if (tmp == oca.ca_ra.ra_vaddr)
180					oca.ca_ra.ra_vaddr = NULL;
181				/*
182				 * or if it has asked us to create a mapping..
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_paddr,
189					    oca.ca_ra.ra_len, oca.ca_bustype);
190
191				config_attach(self, cf, &oca, busprint);
192			}
193	}
194	bus_untmp();
195}
196
197void
198obioattach(parent, self, args)
199	struct device *parent, *self;
200	void *args;
201{
202	busattach(parent, self, args, BUS_OBIO);
203}
204
205struct intrhand **vmeints;
206
207void
208vmesattach(parent, self, args)
209	struct device *parent, *self;
210	void *args;
211{
212	if (vmeints == NULL) {
213		vmeints = (struct intrhand **)malloc(256 *
214		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
215		bzero(vmeints, 256 * sizeof(struct intrhand *));
216	}
217	busattach(parent, self, args, BUS_VME16);
218}
219
220void
221vmelattach(parent, self, args)
222	struct device *parent, *self;
223	void *args;
224{
225	if (vmeints == NULL) {
226		vmeints = (struct intrhand **)malloc(256 *
227		    sizeof(struct intrhand *), M_TEMP, M_NOWAIT);
228		bzero(vmeints, 256 * sizeof(struct intrhand *));
229	}
230	busattach(parent, self, args, BUS_VME32);
231}
232
233int pil_to_vme[] = {
234	-1,	/* pil 0 */
235	-1,	/* pil 1 */
236	1,	/* pil 2 */
237	2,	/* pil 3 */
238	-1,	/* pil 4 */
239	3,	/* pil 5 */
240	-1,	/* pil 6 */
241	4,	/* pil 7 */
242	-1,	/* pil 8 */
243	5,	/* pil 9 */
244	-1,	/* pil 10 */
245	6,	/* pil 11 */
246	-1,	/* pil 12 */
247	7,	/* pil 13 */
248	-1,	/* pil 14 */
249	-1,	/* pil 15 */
250};
251
252int
253vmeintr(arg)
254	void *arg;
255{
256	int level = (int)arg, vec;
257	struct intrhand *ih;
258	int i = 0;
259
260	vec = ldcontrolb(AC_VMEINTVEC | (pil_to_vme[level] << 1) | 1);
261	if (vec == -1) {
262		printf("vme: spurious interrupt\n");
263		return 0;
264	}
265
266	for (ih = vmeints[vec]; ih; ih = ih->ih_next)
267		if (ih->ih_fun)
268			i += (ih->ih_fun)(ih->ih_arg);
269	return (i);
270}
271
272void
273vmeintr_establish(vec, level, ih)
274	int vec, level;
275	struct intrhand *ih;
276{
277	struct intrhand *ihs;
278
279	if (vec == -1)
280		panic("vmeintr_establish: uninitialized vec\n");
281
282	if (vmeints[vec] == NULL)
283		vmeints[vec] = ih;
284	else {
285		for (ihs = vmeints[vec]; ihs->ih_next; ihs = ihs->ih_next)
286			;
287		ihs->ih_next = ih;
288	}
289
290	/* ensure the interrupt subsystem will call us at this level */
291	for (ihs = intrhand[level]; ihs; ihs = ihs->ih_next)
292		if (ihs->ih_fun == vmeintr)
293			return;
294
295	ihs = (struct intrhand *)malloc(sizeof(struct intrhand),
296	    M_TEMP, M_NOWAIT);
297	if (ihs == NULL)
298		panic("vme_addirq");
299	bzero(ihs, sizeof *ihs);
300	ihs->ih_fun = vmeintr;
301	ihs->ih_arg = (void *)level;
302	intr_establish(level, ihs);
303}
304
305#define	getpte(va)		lda(va, ASI_PTE)
306
307/*
308 * If we can find a mapping that was established by the rom, use it.
309 * Else, create a new mapping.
310 */
311void *
312bus_map(pa, len, bustype)
313	void *pa;
314	int len;
315	int bustype;
316{
317	u_long	pf = (u_long)pa >> PGSHIFT;
318	u_long	va, pte;
319	int pgtype;
320
321	switch (bt2pmt[bustype]) {
322	case PMAP_OBIO:
323		pgtype = PG_OBIO;
324		break;
325	case PMAP_VME32:
326		pgtype = PG_VME32;
327		break;
328	case PMAP_VME16:
329		pgtype = PG_VME16;
330		break;
331	}
332
333	if (len <= NBPG) {
334		for (va = OLDMON_STARTVADDR; va < OLDMON_ENDVADDR; va += NBPG) {
335			pte = getpte(va);
336			if ((pte & PG_V) != 0 && (pte & PG_TYPE) == pgtype &&
337			    (pte & PG_PFNUM) == pf)
338				return ((void *)va);
339		}
340	}
341	return mapiodev(pa, len, bustype);
342}
343
344void *
345bus_tmp(pa, bustype)
346	void *pa;
347	int bustype;
348{
349	vm_offset_t addr = (vm_offset_t)pa & ~PGOFSET;
350	int pmtype = bt2pmt[bustype];
351
352	pmap_enter(pmap_kernel(), TMPMAP_VA,
353	    addr | pmtype | PMAP_NC,
354	    VM_PROT_READ | VM_PROT_WRITE, 1);
355	return ((void *)TMPMAP_VA);
356}
357
358void
359bus_untmp()
360{
361	pmap_remove(pmap_kernel(), TMPMAP_VA, TMPMAP_VA+NBPG);
362}
363