obio.c revision 1.2 
1/*	$NetBSD: obio.c,v 1.2 1994/09/17 23:49:58 deraadt 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/ctlreg.h>
48#include <sparc/sparc/asm.h>
49#include <sparc/sparc/vaddrs.h>
50
51struct obio_softc {
52	struct	device sc_dev;		/* base device */
53	int	nothing;
54};
55
56/* autoconfiguration driver */
57static int	obiomatch(struct device *, struct cfdata *, void *);
58static void	obioattach(struct device *, struct device *, void *);
59struct cfdriver obiocd = { NULL, "cgsix", obiomatch, obioattach,
60	DV_DULL, sizeof(struct obio_softc)
61};
62
63void *		obio_map __P((void *, int));
64void *		obio_tmp_map __P((void *));
65void		obio_tmp_unmap __P((void));
66
67int
68obiomatch(parent, cf, args)
69	struct device *parent;
70	struct cfdata *cf;
71	void *args;
72{
73	/*
74	 * This exists for machines that don't have OpenPROM.
75	 */
76	if (cputyp != CPU_SUN4)
77		return 0;
78	return 1;
79}
80
81int
82obio_print(args, obio)
83	void *args;
84	char *obio;
85{
86	register struct confargs *ca = args;
87
88	if (ca->ca_ra.ra_name == NULL)
89		ca->ca_ra.ra_name = "<unknown>";
90	if (obio)
91		printf("%s at %s", ca->ca_ra.ra_name, obio);
92	printf(" slot %d offset 0x%x", ca->ca_slot, ca->ca_offset);
93	return (UNCONF);
94}
95
96void
97obioattach(parent, self, aux)
98	struct device *parent, *self;
99	void *aux;
100{
101	register struct obio_softc *sc = (struct obio_softc *)self;
102	extern struct cfdata cfdata[];
103	struct confargs ca;
104	register short *p;
105	struct cfdata *cf;
106
107	if (sc->sc_dev.dv_unit > 0) {
108		printf(" unsupported\n");
109		return;
110	}
111
112	for (cf = cfdata; cf->cf_driver; cf++) {
113		if (cf->cf_fstate == FSTATE_FOUND)
114			continue;
115		for (p = cf->cf_parents; *p >= 0; p++)
116			if (parent->dv_cfdata == &cfdata[*p]) {
117				ca.ca_ra.ra_iospace = -1;
118				ca.ca_ra.ra_paddr = (void *)cf->cf_loc[0];
119				ca.ca_ra.ra_len = 0;
120				ca.ca_ra.ra_vaddr = obio_tmp_map(ca.ca_ra.ra_paddr);
121				ca.ca_ra.ra_intr[0].int_pri = cf->cf_loc[1];
122				ca.ca_ra.ra_intr[0].int_vec = 0;
123				ca.ca_ra.ra_nintr = 1;
124				if ((*cf->cf_driver->cd_match)(self, cf, &ca) == 0)
125					continue;
126
127				if (ca.ca_ra.ra_len)
128					ca.ca_ra.ra_vaddr =
129					    obio_map(ca.ca_ra.ra_paddr,
130					    ca.ca_ra.ra_len);
131				ca.ca_bustype = BUS_OBIO;
132				config_attach(self, cf, &ca, NULL);
133			}
134	}
135	obio_tmp_unmap();
136}
137
138#define	getpte(va)		lda(va, ASI_PTE)
139
140/*
141 * If we can find a mapping that was established by the rom, use it.
142 * Else, create a new mapping.
143 */
144void *
145obio_map(pa, len)
146	void *pa;
147	int len;
148{
149	u_long	pf = (int)pa >> PGSHIFT;
150	u_long	va, pte;
151
152	for (va = MONSTART; va < MONEND; va += NBPG) {
153		pte = getpte(va);
154		if ((pte & PG_V) != 0 && (pte & PG_TYPE) == PG_OBIO &&
155		    (pte & PG_PFNUM) == pf)
156			return ((void *)va);
157	}
158	return mapiodev(pa, len);
159}
160
161void *
162obio_tmp_map(pa)
163	void *pa;
164{
165	pmap_enter(kernel_pmap, TMPMAP_VA,
166	    (vm_offset_t)pa | PMAP_OBIO | PMAP_NC,
167	    VM_PROT_READ | VM_PROT_WRITE, 1);
168	return ((void *)TMPMAP_VA);
169}
170
171void
172obio_tmp_unmap()
173{
174	pmap_remove(kernel_pmap, TMPMAP_VA, TMPMAP_VA+NBPG);
175}
176