cia.c revision 1.19 
1/* $NetBSD: cia.c,v 1.19 1997/04/07 23:40:29 cgd Exp $ */
2
3/*
4 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
5 * All rights reserved.
6 *
7 * Author: Chris G. Demetriou
8 *
9 * Permission to use, copy, modify and distribute this software and
10 * its documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
22 *  School of Computer Science
23 *  Carnegie Mellon University
24 *  Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#include <machine/options.h>		/* Config options headers */
31#include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
32
33__KERNEL_RCSID(0, "$NetBSD: cia.c,v 1.19 1997/04/07 23:40:29 cgd Exp $");
34
35#include <sys/param.h>
36#include <sys/systm.h>
37#include <sys/kernel.h>
38#include <sys/malloc.h>
39#include <sys/device.h>
40#include <vm/vm.h>
41
42#include <machine/autoconf.h>
43#include <machine/rpb.h>
44
45#include <dev/isa/isareg.h>
46#include <dev/isa/isavar.h>
47
48#include <dev/pci/pcireg.h>
49#include <dev/pci/pcivar.h>
50#include <alpha/pci/ciareg.h>
51#include <alpha/pci/ciavar.h>
52#ifdef DEC_KN20AA
53#include <alpha/pci/pci_kn20aa.h>
54#endif
55#ifdef DEC_EB164
56#include <alpha/pci/pci_eb164.h>
57#endif
58
59int	ciamatch __P((struct device *, struct cfdata *, void *));
60void	ciaattach __P((struct device *, struct device *, void *));
61
62struct cfattach cia_ca = {
63	sizeof(struct cia_softc), ciamatch, ciaattach,
64};
65
66struct cfdriver cia_cd = {
67	NULL, "cia", DV_DULL,
68};
69
70static int	ciaprint __P((void *, const char *pnp));
71
72/* There can be only one. */
73int ciafound;
74struct cia_config cia_configuration;
75
76int
77ciamatch(parent, match, aux)
78	struct device *parent;
79	struct cfdata *match;
80	void *aux;
81{
82	struct confargs *ca = aux;
83
84	/* Make sure that we're looking for a CIA. */
85	if (strcmp(ca->ca_name, cia_cd.cd_name) != 0)
86		return (0);
87
88	if (ciafound)
89		return (0);
90
91	return (1);
92}
93
94/*
95 * Set up the chipset's function pointers.
96 */
97void
98cia_init(ccp, mallocsafe)
99	struct cia_config *ccp;
100	int mallocsafe;
101{
102
103	/*
104	 * Can't set up SGMAP data here; can be called before malloc().
105	 * XXX THIS COMMENT NO LONGER MAKES SENSE.
106	 */
107
108	ccp->cc_hae_mem = REGVAL(CIA_CSR_HAE_MEM);
109	ccp->cc_hae_io = REGVAL(CIA_CSR_HAE_IO);
110
111	if (!ccp->cc_initted) {
112		/* don't do these twice since they set up extents */
113		ccp->cc_iot = cia_bus_io_init(ccp);
114		ccp->cc_memt = cia_bus_mem_init(ccp);
115	}
116	ccp->cc_mallocsafe = mallocsafe;
117
118	cia_pci_init(&ccp->cc_pc, ccp);
119
120	/* XXX XXX BEGIN XXX XXX */
121	{							/* XXX */
122		extern vm_offset_t alpha_XXX_dmamap_or;		/* XXX */
123		alpha_XXX_dmamap_or = 0x40000000;		/* XXX */
124	}							/* XXX */
125	/* XXX XXX END XXX XXX */
126
127	ccp->cc_initted = 1;
128}
129
130void
131ciaattach(parent, self, aux)
132	struct device *parent, *self;
133	void *aux;
134{
135	struct cia_softc *sc = (struct cia_softc *)self;
136	struct cia_config *ccp;
137	struct pcibus_attach_args pba;
138
139	/* note that we've attached the chipset; can't have 2 CIAs. */
140	ciafound = 1;
141
142	/*
143	 * set up the chipset's info; done once at console init time
144	 * (maybe), but doesn't hurt to do twice.
145	 */
146	ccp = sc->sc_ccp = &cia_configuration;
147	cia_init(ccp, 1);
148
149	/* XXX print chipset information */
150	printf("\n");
151
152	switch (hwrpb->rpb_type) {
153#ifdef DEC_KN20AA
154	case ST_DEC_KN20AA:
155		pci_kn20aa_pickintr(ccp);
156#ifdef EVCNT_COUNTERS
157		evcnt_attach(self, "intr", &kn20aa_intr_evcnt);
158#endif
159		break;
160#endif
161
162#ifdef DEC_EB164
163	case ST_EB164:
164		pci_eb164_pickintr(ccp);
165#ifdef EVCNT_COUNTERS
166		evcnt_attach(self, "intr", &eb164_intr_evcnt);
167#endif
168		break;
169#endif
170
171	default:
172		panic("ciaattach: shouldn't be here, really...");
173	}
174
175	pba.pba_busname = "pci";
176	pba.pba_iot = ccp->cc_iot;
177	pba.pba_memt = ccp->cc_memt;
178	pba.pba_pc = &ccp->cc_pc;
179	pba.pba_bus = 0;
180	config_found(self, &pba, ciaprint);
181}
182
183static int
184ciaprint(aux, pnp)
185	void *aux;
186	const char *pnp;
187{
188	register struct pcibus_attach_args *pba = aux;
189
190	/* only PCIs can attach to CIAs; easy. */
191	if (pnp)
192		printf("%s at %s", pba->pba_busname, pnp);
193	printf(" bus %d", pba->pba_bus);
194	return (UNCONF);
195}
196