1 /* $NetBSD: apecs.c,v 1.59 2021/08/07 16:18:41 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1995, 1996 Carnegie-Mellon University.
34 * All rights reserved.
35 *
36 * Author: Chris G. Demetriou
37 *
38 * Permission to use, copy, modify and distribute this software and
39 * its documentation is hereby granted, provided that both the copyright
40 * notice and this permission notice appear in all copies of the
41 * software, derivative works or modified versions, and any portions
42 * thereof, and that both notices appear in supporting documentation.
43 *
44 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
45 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
46 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
47 *
48 * Carnegie Mellon requests users of this software to return to
49 *
50 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
51 * School of Computer Science
52 * Carnegie Mellon University
53 * Pittsburgh PA 15213-3890
54 *
55 * any improvements or extensions that they make and grant Carnegie the
56 * rights to redistribute these changes.
57 */
58
59 #include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
60
61 __KERNEL_RCSID(0, "$NetBSD: apecs.c,v 1.59 2021/08/07 16:18:41 thorpej Exp $");
62
63 #include <sys/param.h>
64 #include <sys/systm.h>
65 #include <sys/kernel.h>
66 #include <sys/device.h>
67
68 #include <machine/autoconf.h>
69 #include <machine/rpb.h>
70 #include <machine/sysarch.h>
71
72 #include <dev/isa/isareg.h>
73 #include <dev/isa/isavar.h>
74
75 #include <dev/pci/pcireg.h>
76 #include <dev/pci/pcivar.h>
77 #include <alpha/pci/apecsreg.h>
78 #include <alpha/pci/apecsvar.h>
79
80 static int apecsmatch(device_t, cfdata_t, void *);
81 static void apecsattach(device_t, device_t, void *);
82
83 CFATTACH_DECL_NEW(apecs, 0, apecsmatch, apecsattach, NULL, NULL);
84
85 extern struct cfdriver apecs_cd;
86
87 static int apecs_bus_get_window(int, int,
88 struct alpha_bus_space_translation *);
89
90 /* There can be only one. */
91 static int apecsfound;
92 struct apecs_config apecs_configuration;
93
94 static int
apecsmatch(device_t parent,cfdata_t match,void * aux)95 apecsmatch(device_t parent, cfdata_t match, void *aux)
96 {
97 struct mainbus_attach_args *ma = aux;
98
99 /* Make sure that we're looking for an APECS. */
100 if (strcmp(ma->ma_name, apecs_cd.cd_name) != 0)
101 return (0);
102
103 if (apecsfound)
104 return (0);
105
106 return (1);
107 }
108
109 /*
110 * Set up the chipset's function pointers.
111 */
112 void
apecs_init(struct apecs_config * acp,int mallocsafe)113 apecs_init(struct apecs_config *acp, int mallocsafe)
114 {
115 acp->ac_comanche_pass2 =
116 (REGVAL(COMANCHE_ED) & COMANCHE_ED_PASS2) != 0;
117 acp->ac_memwidth =
118 (REGVAL(COMANCHE_GCR) & COMANCHE_GCR_WIDEMEM) != 0 ? 128 : 64;
119 acp->ac_epic_pass2 =
120 (REGVAL(EPIC_DCSR) & EPIC_DCSR_PASS2) != 0;
121
122 acp->ac_haxr1 = REGVAL(EPIC_HAXR1);
123 acp->ac_haxr2 = REGVAL(EPIC_HAXR2);
124
125 if (!acp->ac_initted) {
126 /* don't do these twice since they set up extents */
127 apecs_bus_io_init(&acp->ac_iot, acp);
128 apecs_bus_mem_init(&acp->ac_memt, acp);
129
130 /*
131 * We have two I/O windows and 3 MEM windows.
132 */
133 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_IO] = 2;
134 alpha_bus_window_count[ALPHA_BUS_TYPE_PCI_MEM] = 3;
135 alpha_bus_get_window = apecs_bus_get_window;
136 }
137 acp->ac_mallocsafe = mallocsafe;
138
139 apecs_pci_init(&acp->ac_pc, acp);
140 alpha_pci_chipset = &acp->ac_pc;
141
142 acp->ac_initted = 1;
143 }
144
145 static void
apecsattach(device_t parent,device_t self,void * aux)146 apecsattach(device_t parent, device_t self, void *aux)
147 {
148 struct apecs_config *acp;
149 struct pcibus_attach_args pba;
150
151 /* note that we've attached the chipset; can't have 2 APECSes. */
152 apecsfound = 1;
153
154 /*
155 * set up the chipset's info; done once at console init time
156 * (maybe), but doesn't hurt to do twice.
157 */
158 acp = &apecs_configuration;
159 apecs_init(acp, 1);
160
161 apecs_dma_init(acp);
162
163 aprint_normal(": DECchip %s Core Logic chipset\n",
164 acp->ac_memwidth == 128 ? "21072" : "21071");
165 aprint_normal_dev(self, "DC21071-CA pass %d, %d-bit memory bus\n",
166 acp->ac_comanche_pass2 ? 2 : 1, acp->ac_memwidth);
167 aprint_normal_dev(self, "DC21071-DA pass %d\n",
168 acp->ac_epic_pass2 ? 2 : 1);
169 /* XXX print bcache size */
170
171 if (!acp->ac_epic_pass2)
172 printf("WARNING: 21071-DA NOT PASS2... NO BETS...\n");
173
174 alpha_pci_intr_init(acp, &acp->ac_iot, &acp->ac_memt, &acp->ac_pc);
175
176 pba.pba_iot = &acp->ac_iot;
177 pba.pba_memt = &acp->ac_memt;
178 pba.pba_dmat =
179 alphabus_dma_get_tag(&acp->ac_dmat_direct, ALPHA_BUS_PCI);
180 pba.pba_dmat64 = NULL;
181 pba.pba_pc = &acp->ac_pc;
182 pba.pba_bus = 0;
183 pba.pba_bridgetag = NULL;
184 pba.pba_flags = PCI_FLAGS_IO_OKAY | PCI_FLAGS_MEM_OKAY |
185 PCI_FLAGS_MRL_OKAY | PCI_FLAGS_MRM_OKAY | PCI_FLAGS_MWI_OKAY;
186 config_found(self, &pba, pcibusprint, CFARGS_NONE);
187 }
188
189 static int
apecs_bus_get_window(int type,int window,struct alpha_bus_space_translation * abst)190 apecs_bus_get_window(int type, int window,
191 struct alpha_bus_space_translation *abst)
192 {
193 struct apecs_config *acp = &apecs_configuration;
194 bus_space_tag_t st;
195
196 switch (type) {
197 case ALPHA_BUS_TYPE_PCI_IO:
198 st = &acp->ac_iot;
199 break;
200
201 case ALPHA_BUS_TYPE_PCI_MEM:
202 st = &acp->ac_memt;
203 break;
204
205 default:
206 panic("apecs_bus_get_window");
207 }
208
209 return (alpha_bus_space_get_window(st, window, abst));
210 }
211